ACT3492 Series MIL-STD-553B RT, BC, or Passive Hyb (7/07)

ACT3492 Series
MIL-STD-1553B Remote Terminal, BUS Controller,
or Passive Monitor Hybrid with Status Word Control
& Dual Low Power Monolithic BUS Tranceivers
www.aeroflex.com/Avionics
July 10, 2007
FEATURES
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Fully integrated MIL-STD-1553 RT / BC / MT Terminal
One (1) sq-in low profile 100-pin PGA hermetic package
+5V DC Operation
250mW typical standby power consumption
Automated self-test functions
Allows setting of the message error bit on illegal commands
Provides programmable control over terminal flag and subsystem flag status bits
Full military (-55°C to +125°C) temperature range
Designed for commercial, industrial and aerospace applications
MIL-PRF-38534 compliant
DESC SMD# Pending
+5V
Encoder
Clk
ASIC
Decoder
"O"
T/R
Hybrid
BUS "0"
ASIC
T/R
Hybrid
BUS "1"
Terminal
Address
Inputs
Sub Address
&
Word Count
Outputs
Interface
Unit
Status
Word
Control
Program
Inputs
Discrete
Outputs
Driver
Select
&
Enable
Decoder
"1"
Control
Inputs
Internal
Highway
Control
ASIC
ACT3492
Figure 1 – BLOCK DIAGRAM (WITH TRANSFORMERS)
DESCRIPTION
The Aeroflex Plainview ACT3492 Series is a monolithic implementation of the MIL-STD-1553B Bus Controller,
Remote Terminal and Passive Monitor functions including Dual Low Power Bus Tranceivers. All protocol
functions of MIL-STD-1553B are incorporated and a number of options are included to improve flexibility. These
features include programming of the status word, illegalizing specific commands and an independent loop back
self-test which is initiated by the subsystem. This unit is directly compatible with all microprocessor interfaces such
as the Aeroflex CT1611 and CT1800 products.
SCD3492 Rev C
ABSOLUTE MAXIMUM RATINGS (DIGITAL SECTION)
Parameter
Min
Max
Units
VCC (Logic)
-0.3
7.0
V
Input or Output Voltage at any Pin
-0.3
VCC + 0.3V
V
Storage Case Temperature
-65
+150
°C
-
+300
°C
Load Temperature (Soldering 10 Sec)
DIGITAL PROTOCOL LOGIC CHARACTERISTICS (OVER FULL TEMPERATURE RANGE)
Parameter
Test Conditions
VCC (Logic)
Min
Typ
Max
Unit
4.5
5.0
5.5
V
Notes
VIH
VCC (Logic) = 5.0V
2.2
-
VIL
VCC (Logic) = 5.0V
-
-
0.7
V
VOH High Level Output Voltage
VCC (Logic) = 4.5V
2.4
-
-
V
1
VOL Low Level Output Voltage
VCC (Logic) = 4.5V
-
-
0.4
V
1
IIH High Level Input Current
VCC (Logic) = 5.5V,
VIN = 2.7V
-200
-25
-50
-10
-
-700
-400
-800
-50
µA
µA
µA
µA
2
2A
2B
2C
IIL Low Level Input Current
VCC (Logic) = 5.5V,
VIN = 0.4V
-400
-25
-50
-25
-
-900
-400
-800
-75
µA
µA
µA
µA
2
2A
2B
2C
ICC (Logic)
VCC (Logic) = 5.5V
-
-
20
mA
3
-0.1
-0.01
45
6
-
+0.1
+0.01
55
MHz
%
%
%
Clock Input (6MCK)
Nominal Value
Long Term Tolerance
Short Term tolerance, 1 second
Duty Cycle
V
Notes:
1/ IOL = 3mA maximum, IOH = -2 mA maximum for all outputs and bidirectionals.
2/ RTAD 0, 1, 2, 3, 4 and RTADPAR only.
2A/ All inputs, 6MCK (clock) and bidirectionals other than those in note 2, 2B & 2C.
2B/ For signal TEST only.
2C/ For signal Master Reset only.
3/ Input clock (running) = 6MHz, Master Reset < 0.7V, all remaining Inputs are Open and All Outputs and Bidirectionals have no load.
ABSOLUTE MAXIMUM RATINGS (ANALOG TRANSCEIVER)
Parameter
+5VAA / +5VAB /+5VBA /+5VBB
Receiver Differential Voltage
Receiver Common-Mode Voltage
Driver Peak Output Current
SCD3492 Rev C 7/10/07
Min
Max
Units
-0.3
7.0
V
-
10 Vp-p
V
-5.0
+5.0
Vdc
-
800
mA
Aeroflex Plainview
2
ANALOG TRANSCEIVER RECOMMENDED OPERATING CONDITIONS
Parameter
Min
Max
Unit
4.75
5.5
V
-
4.0
VP-P
-1.75
+5
VDC
Driver Peak Output Current
-
700
mA
Serial Data Rate
-
1.0
MHz
-55
+125
°C
+5VAA / +5VAB /+5VBA /+5VBB
Receiver Differential Voltage (See Point A Figure 4)
Receiver Common-Mode Voltage (See Figure 4)
Case Operating Temperature
ANALOG TRANSCEIVER CHARACTERISTICS (OVER FULL TEMPERATURE RANGE)
Parameter
Min
Max
Unit
Notes
-8
+8
Vp-p
1,3
-1.75
+5
V
1,3
0.6
1.1
V
4
Differential Input Level
Input Common-Mode Voltage
Threshold Voltage
ANALOG TRANSCEIVER CHARACTERISTICS (OVER FULL TEMPERATURE RANGE)
Parameter
Sym
Test Conditions
(See Figure 4)
Min
Max
Unit
Notes
Differential Output Voltage
VO
35 ohm load, Point A
70 ohm load, Point C
6.0
18
9.0
26
Vp-p
Vp-p
1
Differential Output Noise
VON
Inhibited, Point A
-
10
mVp-p
3
Terminal Input Impedance
ZIN
Transmitter off
1 Mhz sine wave
As measured from the 1553
bus (direct coupled) Point A
2.0
-
KΩ
1
Differential Offset Voltage
Vos
35 ohm load, Point A
-
±90
mV
1, 3, 5
70 ohm load, Point C
-
±250
mV
1,5
35 or 70 ohm load
Points A or C
100
300
nSec
1
Rise/Fall Time
tR & tF
ANALOG TRANSCEIVER POWER SUPPLY CHARACTERISTICS (EACH CHANNEL)
Parameter
Sym
Test Conditions
Min
Max
Unit
Notes
Supply Current
ICC1
Standby
-
25
mA
1,2
ICC2
25% duty cycle
-
160
mA
1,2
ICC3
50% duty cycle
-
290
mA
1,2
ICC4
100% duty cycle
-
550
mA
1,2,3
Notes:
1/ VCC = 5.0 Volts dc +/-0.1 Volts dc unless otherwise specified.
2/ All specifications and limits are for a single channel with no connections made to the other channel.
3/ Parameters shall be tested as part of device initial characterization and after design and process changes. Parameter shall be
guaranteed to limits specified in above tables for all lots not specifically tested.
4/ Threshold determined by first no response to a receive 32 word command.
5/ Measured 2.5µSec after the mid-bit zero crossing of the last parity bit of a 660µSec transmission.
SCD3492 Rev C 7/10/07
Aeroflex Plainview
3
REMOTE TERMINAL OPERATION
Receive Data Operation
All valid data words associated with a valid receive data command word for the RT are passed to the subsystem.
The RT examines all command words from the bus and will respond to valid (i.e. correct Manchester, parity
coding etc.) commands which have the correct RT address (or broadcast address if the RT broadcast option is
enabled). When the data words are received, they are decoded and checked by the RT and, if valid, passed to the
subsystem on a word by word basis at 20 µs intervals. This applies to receive data words in both Bus Controller
to RT and RT to RT messages. When the RT detects that the message has finished, it checks that the correct
number of words have been received and if the message is fully valid, then a Good Block Received signal is sent
to the subsystem, which must be used by the subsystem as permission to use the data just received.
The subsystem must therefore have a temporary buffer store up to 32 words long into which these data words can
be placed. The Good Block Received signal will allow use of the buffer store data once the message has been
validated.
If a block of data is not validated, then Good Block Received will not be generated. This may be caused by any
sort of message error or by a new valid command for the RT being received on another bus to which the RT must
switch.
Transmit Data Operation
If the RT receives a valid transmit data command addressed to the RT, then the RT will request the data words
from the subsystem for transmission on a word by word basis. To allow maximum time for the subsystem to
collect each data word, the next word is requested by the RT as soon as the transmission of the current word has
commenced.
It is essential that the subsystem should provide all the data words requested by the RT once a transmit sequence
has been accepted. Failure to do so will be classed by the RT as a subsystem failure and reported as such to the
Bus Controller.
Control of Data Transfers
This section describes the detailed operation of the data transfer mechanism between the RT and subsystems. It
covers the operations of the signals DTRQ, DTAK, IUSTB, H/L, GBR, NBGT, TX/RX during receive data and
transmit data transfers. Figures 29 and 30 show typical interfacing logic.
Figures 5 and 15 shows the operation of the data handshaking signals during a receive command with one data
word. When the RT has fully checked the command word, NBGT is pulsed low, which can be used by the
subsystem as an initialization signal. TX/RX will be set low indicating a receive command. When the first data
word has been fully validated, DTRQ is set low. The subsystem must then reply within approximately 1.5 µs by
setting DTAK low. This indicates to the RT that the subsystem is ready to accept data. The data word is then
passed to the subsystem on the internal highway IH08-IH715 in two bytes using IUSTB as a strobe signal and
H/L as the byte indicator (high byte first followed by low byte). Data is valid about both edges of IUSTB. Signal
timing for this handshaking is shown in Figure 15. Also see Figures 19 and 20.
If the subsystem does not declare itself busy, then it must respond to DTRQ going low by setting DTAK low
within approximately 1.5 us. Failure to do so will be classed by the RT as a subsystem failure and reported as
such to the Bus Controller.
It should be noted that IUSTB is also used for internal working in the RT. DTRQ being low should be used as an
enable for clocking data to the subsystem with IUSTB.
Once the receive data block has finished and been checked by the RT, GBR is pulsed low if the block is entirely
correct and valid. This is used by the subsystem as permission to make use of the data block. If no GBR signal is
generated, then an error has been detected by the RT and the entire data block is invalid and no data words in it
may be used.
If the RT is receiving data in an RT to RT transfer, the data handshaking signals will operate in an identical
SCD3492 Rev C 7/10/07
Aeroflex Plainview
4
fashion but there will be a delay of approx 70 µs between NBGT going low and DTRQ first going low. Figures 6
and 15 show the operation of the data handshaking signals during transmit command with one data word. As
with the receive command discussed previously, NBGT is pulsed low if the command is valid and for the RT.
TX/RX will be set high indicating a transmit data command. While the RT is transmitting its status word, it
requests the first data word from the subsystem by setting DTRQ low. The subsystem must then reply within
approximately 13.5 µs by setting DTAK low. By setting DTAK low, the subsystem is indicating that it has the
data word ready to pass to the RT. Once DTAK is set low by the subsystem, DTRQ should be used together with
H/L and TX/RX to enable first the high byte and then the low byte of the data word onto the internal highway
IH08-IH715. The RT will latch the data bytes during IUSTB, and will then return DTRQ high. Data for each byte
must remain stable until IUSTB has returned low. Signal timing for this handshaking is shown in Figure 15.
Additional Data Information Signals
At the same time as data transfers take place, a number of information signals are made available to the
subsystem. These are INCMD, the subaddress lines SA0-SA4, the word count lines WC0-WC4 and current word
count lines CWC0-CWC4. Use of these signals is optional.
INCMD will go active low while the RT is servicing a valid command for the RT. The subaddress,
transmit/receive bit, and word count from the command word are all made available to the subsystem as
SA0-SA4, TX/RX and WC0-WC4 respectively. They may be sampled when INCMD goes low and will remain
valid while INCMD is low. See Figure 11.
The subaddress is intended to be used by the subsystem as an address pointer for the data block. Subaddress
0 and 31 are mode commands, and there can be no receive or transmit data blocks associated with these. (Any
data word associated with a mode command uses different handshaking operations. If the subsystem does not use
all the subaddresses available, then some of the subaddress lines may be ignored.
The TX/RX signal indicates the direction of data transfer across the RT - subsystem interface. Its use is described
in the previous section.
The word count tells the subsystem the number of words to expect to receive or transmit in a message, up to 32
words. A word count of all 0s indicates a count of 32 words.
The current word count is set to 0 at the beginning of a new message and is incremented following each data
word transfer across the RT - subsystem interface. (It is clocked on the falling edge of the second IUSTB pulse in
each word transfer). It should be noted that there is no need for the subsystem to compare the word count and
current word count to validate the number of words in a message. This is done by the RT.
SUBSYSTEM USE OF STATUS BITS AND MODE COMMANDS
General Description
Use of the status bits and the mode commands is one of the most confusing aspects of MIL-STD-1553B. This is
because much of their use is optional, and also because some involve only the RT while others involve both the
RT and the subsystem.
The ACT3492 allows full use to be made of all the Status Bits, and also implements all the Mode Commands.
External programming of the Terminal Flag and Subsystem Flag Bits plus setting of the Message Error Bit on
reception of an illegal command when externally decoded is available. The subsystem is given the opportunity to
make use of Status Bits, and is only involved in Mode Commands which have a direct impact on the subsystem.
The mode commands in which the subsystem may be involved are Synchronize, Sychronize with data word,
Transmit Vector Word, Reset and Dynamic Bus Control Acceptance. The Status Bits to which the subsystem has
access, or control are Service Request, Busy, Dynamic Bus Control Acceptance, Terminal Flag, Subsystem Flag,
and Message Error Bit. Operation of each of these Mode Commands and of the Status Bits is described in the
following sections.
SCD3492 Rev C 7/10/07
Aeroflex Plainview
5
All other Mode Commands are serviced internally by the RT. The Terminal Flag and Message Error Status Bits
and BIT Word contents are controlled by the RT; however the subsystem has the option to set the Message Error
Bit and to control the reset conditions for the Terminal Flag and Subsystem Flag Bits in the Status Word, and the
Transmitter Timeout, Subsystem Handshake, and Loop Test Fail Bits in the BIT Word.
Synchronize Mode Commands
Once the RT has validated the command word and checked for the correct address, the SYNC line is set low. The
signal WC4 will be set low for a Synchronize mode command, and high for a Synchronize with data word mode
command (See Figure 9). In a Synchronize with data word mode command, SYNC remains low during the time
that the data word is received. Once the data word has been validated, it is passed to the subsystem on the internal
highway IH08-IH715 in two bytes using IUSTB as a strobe signal and H/L as the byte indicator (high byte first
followed by low byte). SYNC being low should be used on the enable to allow IUSTB to clock synchronize
mode data to the subsystem.
If the subsystem does not need to implement either of these mode commands, the SYNC signal can be ignored,
since the RT requires no response from the subsystem.
Transmit Vector Word Mode Command
Figures 8 and 17 illustrates the relevant signal timings for an RT receiving a valid Transmit Vector Word mode
command. The RT requests data by setting VECTEN low. The subsystem should use H/L to enable first the high
byte and then the low byte of the Vector word onto the internal highway IH08-IH715.
It should be noted that the RT expects the Vector word contents to be already prepared in a latch ready for
enabling onto the internal highway when VECTEN goes low. If the subsystem has not been designed to handle
the Vector word mode command, it will be the fault of the Bus Controller if the RT receives such a command.
Since the subsystem is not required to acknowledge the mode command, the RT will not be affected in any way
by Vector word circuitry not being implemented in the subsystem. It will however transmit a data word as the
Vector word, but this word will have no meaning.
Reset Mode Command
Figure 7 shows the relevant signal timings for an RT receiving a valid reset mode command. Once the command
word has been fully validated and serviced, the RESET signal is pulsed low. This signal may be used as a reset
function for subsystem interface circuitry.
Dynamic Bus Allocation
This mode command is intended for use with a terminal which has the capability of configuring itself into a bus
controller on command from the bus. The line DBCREQ (See Figure 7) cannot go true unless the DBCACC line
was true at the time of the valid command, i.e. tied low. For terminals acting only as RTs, the signal DBCACC
should be tied high (inactive), and the signal DBCREQ should be ignored and left unconnected.
Use of the Busy Status Bit
The Busy Bit is used by the subsystem to indicate that it is not ready to handle data transfers either to or from the
RT.
The RT sets the bit to logic one if the BUSY line from the subsystem is active low at the time of the second
falling edge of INCLK after INCMD goes low. This is shown in Figures 14 and 20. Once the Busy bit is set, the
RT will stop all receive and transmit data word transfers to and from the subsystem. The data transfers in the
Synchronize with data word and Transmit Vector word mode commands are not affected by the Busy bit and will
take place even if it has been set.
It should be noted that a minimum of 0.5 µs subaddress decoding time is given to the subsystem before setting of
status bits. This allows the subsystem to selectively set the Busy bit if for instance one subaddress is busy but
others are ready. This option will prove useful when an RT is interfacing with multiple subsystems.
SCD3492 Rev C 7/10/07
Aeroflex Plainview
6
Use of the Service Request Status Bit
The Service Request bit is used by the subsystem to indicate to the Bus Controller that an asynchronous service
is requested.
The timing of the setting of this bit is the same as the Busy bit and is shown in Figures 14 and 20. Use of
SERVREQ has no effect on the RT apart from setting the Service Request bit.
It should be noted that certain mode commands require that the last status word be transmitted by the RT instead
of the current one, and therefore a currently set status bit will not be seen by the Bus Controller. Therefore the
user is advised to hold SERVREQ low until the requested service takes place.
Use of the Subsystem Status Bit
This status bit is used by the RT to indicate a subsystem fault condition. If the subsystem sets SSERR low at any
time, the subsystem fault condition in the RT will be set, and the Subsystem Flag status bit will subsequently be
set. The fault condition will also be set if a handshaking failure takes place during a data transfer to or from the
subsystem. The fault condition is cleared on power-up or by a Reset mode command.
Dynamic Bus Control Acceptance Status Bit
DBCACC, when set true, enables an RT to configure itself into a Bus Controller, if the subsystem has the
capability, by allowing DBCREQ to pulse true and BIT TIME 18 to be set in the status response. If Dynamic Bus
Control is not required then DBCACC must be tied high. DBCACC tied high inhibits DBCREQ and clears BIT
TIME 18 in the status response.
OPTIONAL STATUS WORD CONTROL
Message Error Bit
The ACT3492 monitors all receptions for errors and sets the Message Error Bit as prescribed in
MIL-STD-1553B. The subsystem designer may, however, exercise the option of monitoring for illegal
commands and forcing the Message Error Bit to be set.
The word count and subaddress lines for the current command are valid when INCMD goes low. The subsystem
must then determine whether or not the word count or subaddress is to be considered illegal by the RT. If either
of them is considered illegal, the subsystem must produce a positive-going pulse called MEREQ. The
positive-going edge of MEREQ must occur within 500 nSec of the falling edge of INCMD .
Subsystem Flag and Terminal Flag Bits
The conditions that cause the Subsystem Flag and Terminal Flag Bits in the Status Word to be reset may be
controlled by the subsystem using the ENABLE, BIT DECODE, NEXT STATUS, and STATUS UPDATE
inputs. If ENABLE is inactive (high), then the Terminal Flag and Subsystem Flag behavior is the same as
described below: (i.e. the other three option lines are disabled).
Subsystem Flag Bit
This bit is reset to logic zero by a power up initialization or the servicing of a legal mode command to reset
the remote terminal (code 01000).
This bit shall be set in the current status register if the subsystem error line, SSERR, from the subsystem
ever goes active low. This bit shall also be set if an RT/subsystem handshaking failure occurs. This bit,
once set, shall be repeatedly set until the detected error condition is known to be no longer present.
SCD3492 Rev C 7/10/07
Aeroflex Plainview
7
Terminal Flag Bit
This bit is reset to logic zero by a power up initialization or the servicing of a legal mode command to reset
the remote terminal (code 01000). This bit can be set to logic one in the current status register in four
possible ways:
1) If the RX detects any message encoding or content error in the terminals transmission. A loop test
failure, LTFAIL, will be signalled which shall cause the Terminal Flag to be set and the transmission
aborted.
2) If a transmitter timeout occurs while the terminal is transmitting.
3) If a remote terminal self test fails.
4) If there is a parity error in the hard wired address to the RX chip.
This bit, once set, shall be repeatedly set until the detected error condition is known to be no longer present.
The transmission of this bit as a logic one can be inhibited by a legal mode command to inhibit terminal flag
bit (code 00110). Similarly, this inhibit can be removed by a mode command to override inhibit terminal
flag bit (code 00111), a power up initialization or a legal mode command to reset remote terminal (code
01000).
If ENABLE is held low, then the three options described below are available and are essentially independent.
Any, all, or none may be selected. Also, reporting of faults by the subsystem requires that SSERR be latched (not
pulsed) low until the fault is cleared.
Resetting SSF and TF on Receipt of Valid Commands
If ENABLE is selected and the other three option lines are held high, then the Status Word Register will be reset
on receipt of any valid command with the exception of Transmit Status and Transmit Last Command. Note that
in this mode, the TF will never be seen in the Status Word, and the SSF will only be seen if SSERR is latched
low. Also note that the SSF will not be seen in response to Transmit Status or Transmit Last Command if the
preceding Status Word was clear, regardless of actions taken on the SSERR line after the clear status
transmission.
Status Register Update at Fault Occurrence
If STATUS UPDATE is selected (held low), then the TF or SSF will appear in response to a Transmit Status or
Transmit Last Command issued as the first command after the fault occurs. Any other command (except as noted
in the Preserving the BIT Word section) will reset the TF and SSF. Repeated Transmit Status or Transmit Last
Command immediately following the fault will continue to show the TF and/or SSF in the Status Word. Note
that this behavior may not meet the "letter-of-the-spec" as described in MIL-STD-1553B, but is considered the
"preferred" behavior by some users.
TF and SSF Reporting in the Next Status Word
After the Fault
If NEXT STATUS is selected (held low), then the TF or SSF will appear in response to the very next valid
command after the fault except for Transmit Status or Transmit Last Command. The flag(s) will be reset on
receipt of any valid command following the status transmission with the flag(s) set except for Transmit Status,
Transmit Last Command, or as noted in the following section on Preserving the BIT Word.
Preserving the BIT Word
In order to preserve the Transmitter Timeout Flag, Subsystem Handshake Failure, and Loop Test Failure Bits in
the BIT Word, it is necessary to select BIT DECODE (hold it low). This will prevent resetting those bits if the
Transmit Bit Word Mode Command immediately follows the fault or follows a Transmit Last Command or
Transmit Status immediately following the fault. It will also prevent resetting the TF and SSF Bits in the Status
Word. Any other valid commands will cause those BIT Word Bits and the Status Word Bits to be reset.
SCD3492 Rev C 7/10/07
Aeroflex Plainview
8
BUS CONTROL OPERATION
To enable its use in a bus controller the ASIC has additional logic within it. This logic can be enabled by pulling
the pin labelled RT/BC low. Once the ASIC is in bus control mode, all data transfers must be initiated by the bus
control processor correctly commanding the ASIC via the subsystem interface. In bus control mode six inputs are
activated which in RT mode are inoperative and four signals with dual functions exercise the second function
(the first being for the RT operation).
To use the ACT3492 as a 1553B bus control interface, the bus control processor must be able to carry out four
basic bus-related functions. Two inputs, BCOPA and BCOPB allow these four options to be selected. The option
is then initiated by sending a negative-going strobe on the BCOPSTB input. BCOPSTB must only be strobed low
when NDRQ is high. This is particularly important when two options are required during a single transfer.See
Figure 28 and Table 1.
With these options all message types and lengths can be handled. Normal BC/RT exchanges are carried out in
option zero. This is selected by setting BCOPA and BCOPB to a zero and strobing BCOPSTB. On receipt of the
strobe, the ACT3492 loads the command word from an external latch using CWEN and H/L. The command
word is transmitted down the bus. The TX/RX bit is, however, considered as being its inverse and so if a transmit
command is sent to a RT (Figure 21), the ACT3492 in BC mode believes it has been given a receive command.
As the RT returns the requested number of data words plus its status, the BC carries out a full validation check
and passes the data into the subsystem using DTRQ, DTAK, H/L, IUSTB and CWC as in RT operation. It also
supplies GBR at the end of a valid transmission. Conversely, a receive command sent down the bus is interpreted
by the BC as a transmit command, and so the requisite data words are added to the command word. See
Figure 22.
For mode commands, where a single command word is required, option one is selected by strobing BCOPSTB
when BCOPA is high and BCOPB is low. On receiving the strobe, the command word is loaded from the
external latch using CWEN and H/L, the correct sync and parity bits are added and the word transmitted (See
Figure 23). Mode commands followed by a data word requires option two. Option two, selected by strobing
BCOPSTB while BCOPA is low and BCOPB is high, loads a data word via DWEN and H/L, adds sync and
parity and transmits them to the bus (See Figure 25). If the mode code transmitted required the RT to return a
data word, then selecting option three by strobing BCOPSTB when BCOPA and BCOPB are both high will
identify that data word and if validated, output it to the subsystem interface using RMDSTB and H/L. This
allows data words resulting from mode codes to be identified differently from ordinary data words and routed
accordingly (See Figure 24). All received status words are output to the subsystem interface using STATSTB
and H/L.
In BC option three, if the signal PASMON is active, then all data appearing on the selected bus is output to the
subsystem using STATSTB for command and status words or RMDSTB for data words. See Passive Monitor.
RT to RT transfers require the transmission of two command words. A receive command to one RT is
contiguously followed by a transmit command to the other RT. This can be achieved by selecting option one
followed by option zero for the second command. The strobe (BCOPSTB) for option zero must be delayed until
NDRQ has gone low and returned high following the strobe for option one. The RT transmissions are checked
and transferred in the subsystem interface to the bus control processor (See Figure 26).
BC must wait for RTO to pulse before issuing subsequent messages.
PASSIVE MONITOR
The Monitor Mode may be utilized to analyze or collect all activities which occur on a selected bus. This is
initiated by selecting a bus, placing the unit in BC option three and setting PASMON low. All data appearing on
the selected bus is output to the subsystem using STATSTB for Command and Status Words or RMDSTB for
Data Words. See Figure 27.
SCD3492 Rev C 7/10/07
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9
AUTOMATED SELF-TEST
The ACT3492 has been designed to fully support a wrap-around self-test which ensures a high degree of fault
coverage. The monolithic circuit includes all circuitry required to perform the self-test.
Self-test can be an on-line or off-line function which is initiated by simple subsystem intervention. The
DRVINH signal selects on-line or off-line testing. The circuit accomplishes the on-line test without accessing
the MIL-STD-1553 data bus by providing an internal data path which connects the encoder circuitry directly to
the decoder circuitry. The transceiver is inhibited during this on-line test. The off-line test is designed to include
the transceiver as well as the protocol device. This mode will generally be useful as an off-line card test where
no live bus is in use.
To initiate the self-test a word is placed in the Vector Word Latch, Loop Test Enable (LTEN) is held low, and the
Loop Test Trigger (LTTRIG) signal is pulsed low. The primary bus will be tested with the word that resides in
the Vector Word Latch, encoded then looped back, decoded and presented to the subsystem as a normal data
transfer would be accomplished. The secondary bus is sequentially tested after the primary bus is completed via
Request Bus A (REQBUSA) utilizing the same word residing in the Vector Word Latch. Upon completion of
each test, pass/fail signals will be asserted reporting the results of the test. This test implementation verifies
MIL-STD-1553 protocol compliance; proper sync character, 16 data bits, Manchester II coding, odd parity,
contiguous word checking and a bit by bit comparison of the transmitted data. The self-test circuitry increases
the fault coverage by insuring that the internal function blocks; encoder, decoder, and internal control circuitry
are operating correctly. An effective data pattern to accomplish this is HEX AA55 since each bit is toggled,
(8 bit internal highway) on a high/low byte basis. The total time required to complete the self-test cycle is
89 microseconds. The Loop Test Enable signal must remain in the low state throughout the diagnostic cycle.
SCD3492 Rev C 7/10/07
Aeroflex Plainview
10
PIN DESCRIPTION
Signal
Direction
Pin
Signal Description
RTAD 0-4
INPUT
K6,K5
J5,H5
F4
RT address lines - These should be hardwired by the user. RTAD4
is the most significant bit.
RTADPAR
INPUT
J6
RT address parity line - This must be hardwired by the user to give
odd parity.
BIT DECODE
INPUT
J4
Bitword Decode - When held low, prevents resetting TXTO Bit,
HSFAIL Bit, and LTFAIL Bit in the BIT Word (as well as TF and
SSF Bits in the Status Word) upon receipt of a Transmit Bit Word
Mode Command.
BCSTEN 1
INPUT
F5
Broadcast command enable Bus 1 - When low the recognition of
broadcast command is prevented on Bus 1.
BCSTEN 0
INPUT
G5
Broadcast command enable Bus 0 - When low the recognition of
broadcast command is prevented on Bus 0.
6MCK (Clock)
INPUT
E4
6 Megahertz master clock.
IH 08 (LSB)
IH 19
IH 210
IH 311
IH 412
IH 513
IH614
IH715 (MSB)
BIDIR
E9
D6
D7
A9
D8
B9
D9
C9
Internal Highway - Bi-directional 8 bit highway on which 16 bit
words are passed in two bytes. IH 715 is the most significant bit of
each byte, the most significant byte being transferred first. The
highway should only be driven by the subsystem when data is to be
transferred to the RT.
DTRQ
OUTPUT
K10
Data Transfer Request - Goes low to request a data transfer
between the ASIC and subsystem. Goes high at the end of the
transfer.
DTAK
INPUT
F6
Data Transfer Acknowledge - Goes low to indicate that the
subsystem is ready for the data transfer.
IUSTB
OUTPUT
G6
Interface Unit Strobe - This is a double pulse strobe used to transfer
the two bytes of data
H/L
OUTPUT
J9
High/Low - Indicates which byte of data is on the internal highway.
Logic level "0" for least significant byte.
GBR
OUTPUT
J7
Good Block Received - Pulses low for 500ns when a block of data
has been received by the ASIC and has passed all the validity and
error checks.
NBGT
OUTPUT
G9
New Bus Grant - Pulses low whenever a new command is accepted
by the ASIC.
MEREQ
INPUT
E8
Message Error Request - Positive-going edge will cause Message
Error Bit in Status Word to be set.
TX/RX
OUTPUT
H10
Transmit/Receive - The state of this line informs the subsystem
whether it is to transmit or receive data. The signal is valid while
INCMD is low.
SCD3492 Rev C 7/10/07
Aeroflex Plainview
11
PIN DESCRIPTION (con’t)
Signal
Direction
Pin
Signal Description
INCMD
OUTPUT
K9
In Command - Goes low when the RT is servicing a valid
command. The subaddress and word count lines are valid while the
signal is low.
WC0-WC4
OUTPUT
B7,C8
A6,B6
A4
Word Count - These five lines specify the requested number of data
words to be received or transmitted. Valid when INCMD is low.
SA0-SA4
OUTPUT
J10,K8
H7,K3
H2
Sub Address - These five lines are a label for the data being
transferred. Valid when INCMD is low.
CWC0-CWC4
OUTPUT
H4,H8
K4,J8
K1
Current Word Count - These five lines define which data word in
the message is currently being transferred.
SYNC
OUTPUT
G7
Synchronize - Goes low when a synchronize mode code is being
serviced.
VECTEN/DWEN
OUTPUT
G8
Vector Word Enable/DataWord Enable - In the RT mode, this
signal is provided to enable the contents of the vector word latch
(which is situated in the subsystem) onto the ASIC’s internal
highway. This signal, when in the Bus Controller mode, is used to
enable mode code data from the subsystem onto the internal
highway.
RESET
OUTPUT
C4
Reset - This line pulses low for 500ns on completion of the servicing
of a valid and legal mode command to reset remote terminal.
SSERR
INPUT
A5
Subsystem Error - By taking this line low, the subsystem can set
the Subsystem Flag in the Status Word.
BUSY
INPUT
C7
Busy - This signal should be driven low if the subsystem is not ready
to perform a data transfer to or from the ASIC.
SERVREQ
INPUT
A3
Service Request - This signal should be driven low to request an
asynchronous transfer and left low until the transfer has taken place.
INCLK
OUTPUT
G10
Internal Clock (2 MHz) - This is made available for
synchronization use by the subsystem if required. However, many of
the outputs to the subsystem are asynchronous.
EOT
OUTPUT
H9
End of Transmission - Goes low if a valid sync plus two data bits
do not appear in time to be contiguous with preceding word.
RTADER
OUTPUT
A1
Remote Terminal Address Error - This line goes low if an error is
detected in the RT address parity of the selected receiver. Any
receiver detecting an error in the RT address will turn itself off.
HSFAIL
OUTPUT
B5
Handshake Failure - This line pulses low if the allowable time for
DTAK response has been exceeded during the ASIC/subsystem data
transfer handshaking.
LSTCMD/CWEN
OUTPUT
D5
Last Command/Command Word Enable - This line pulses low
when servicing a valid and legal mode command to transmit last
command. When in RT mode this line must not be used to enable
data from the subsystem. This line also pulses low, when in the Bus
Control mode, when a command word is required for transmission.
SCD3492 Rev C 7/10/07
Aeroflex Plainview
12
PIN DESCRIPTION (con’t)
Signal
Direction
Pin
STATEN/
STATSTB
OUTPUT
K7
Status Enable/Status Strobe - This line pulses low to enable the
status word onto the internal highway for transmission. When in RT
mode this line must not be used to enable data from the subsystem.
This line also pulses high, when in the Bus Control mode, to strobe
received status words into the subsystem. When PASMON is true
this line pulses high for Command and Status words.
INPUT
E6
Status Update - When held low, causes TF or SSF to appear in
Status Word response to Transmit Status or Transmit Last
Command issued immediately after fault occurrence
BITEN/RMDSTB
OUTPUT
C6
Built In Test Enable/Receive Mode Data Strobe - This line pulses
low when servicing a valid and legal mode command to transmit the
internal BIT word. This signal is for information only and must not
be used to enable data from the subsystem. This line also pulses high
when in the Bus Control mode when mode data is received to be
passed to the subsystem and when data is passed to the subsystem
during PASMON.
DWSYNC
OUTPUT
G3
Data Word Sync - This line goes low if a data word sync and two
Manchester biphase bits are valid.
ENABLE
INPUT
E7
Enable - When held low, enables Bit Decode, Next Status, and
Status Update program lines.
CMSYNC
OUTPUT
G4
Command Word Sync - This line goes low if a command word
sync and two Manchester biphase bits are valid.
NDRQ
OUTPUT
D10
No Data Required - This line goes low if the encoder transmit
buffer is full i.e. another word is going to be transmitted. This signal
is for information only and must not be used to enable data from the
subsystem.
NEXT STAT
INPUT
A10
Next Status - When held low, causes TF or SSF to appear in very
next Status Word after fault occurrence (except for Transmit Status
or Transmit Last Command).
MASTER RESET
INPUT
B8
Master Reset - A logic low on this input (100 nSec minimum) will
reset the interface.
PASMON
INPUT
F8
Passive Monitor - When functioning as a Bus Controller this line
acts as a passive monitor select. The active going edge of this line
will cause the REQBUS lines to be latched and that bus, now
selected will be monitored so long as PASMON remains low. All
traffic on the bus will be handed, after validation, to the subsystem
via STATSTB for status and commands words, and RMDSTB for
data words.
BCOPSTB
INPUT
F7
Bus Controller Operation Strobe - When functioning as a Bus
Controller a low going pulse on this line will initiate the selected bus
controller operation on the requested bus, using BCOPA&B and
REQBUSA&B.
BCOPA
INPUT
B10
Bus Control Operation A - Least significant bit of the bus
controller operation select lines.
BCOPB
INPUT
C10
Bus Control Operation B - Most significant bit of the bus controller
operation select lines.
STAT UPDATE
Signal Description
SCD3492 Rev C 7/10/07
Aeroflex Plainview
13
PIN DESCRIPTION (con’t)
Signal
Direction
Pin
Signal Description
REQBUS A
BIDIR
E5
Request Bus A - This line, when in RT mode, is the least significant
bit of the bus request lines which specify the origin of the command,
i.e. they are sources. When in BC mode these lines are sinks and
specify which bus is to be used for the next command.
REQBUS B
BIDIR
H6
Request Bus B - Most significant bit of the bus request lines. (See
above for description.)
RT/BC
INPUT
B4
Remote Terminal/Bus Control - This line when high causes the
ASIC to function as a remote terminal. When low the ASIC
functions as a bus controller or passive monitor.
DBCACC
INPUT
B3
Dynamic Bus Control Accept - This line should be permanently
tied low if a subsystem is able to accept control of the bus if offered.
LTFAIL
OUTPUT
E2
Loop Test Fail - This line goes low if any error in the transmitted
waveform is detected or if any parity error in the hardwired RT
address is detected.
ERROR
OUTPUT
F2
Error - This line latches low if a Manchester or parity error is
detected. It is reset by the next CMSYNC (RT mode) and also by
RTO in the BC mode.
RTO
OUTPUT
F3
Reply Time Out - This signal will pulse low whenever the reply
time for a transmitting terminal has been exceeded. This line is
intended for the bus controller use.
TXTO
OUTPUT
C3
Transmitter Time Out - This line latches low if the transmitter time
out limits are exceeded.
PARER
OUTPUT
D3
Parity Error - This line will pulse low if a parity error is detected by
the decoder.
MANER
OUTPUT
E3
Manchester Error - This line will pulse low if a Manchester error is
detected by the decoder.
DBCREQ
OUTPUT
C5
Dynamic Bus Control Request - This line will pulse low when the
status reply for a mode code Dynamic Bus Control has finished
where the accept bit was set.
VALD
OUTPUT
C2
Valid Data - This line will pulse low when a valid data word is
received.
DRVINH
INPUT
H3
Driver Inhibit - Selects on-line or off-line testing during automated
self test. When high self test is on-line. Must be high when LTEN is
high.
LTEN
INPUT
A7
Loop Test Enable - Enables automated self-test when low.
Normally high.
LTTRIG
INPUT
A8
Loop Test Trigger - When pulsed low while LTEN is low
automated self-test is initiated. LTEN pulse width should be 100ns
< PW < 5µs.
TX/RX A1
TX/RX A2
BIDIR
B2
B1
Bus A Transmit/Receive - HIGH output to the primary side of the
coupling transformer that connects to the A Channel of the 1553
Bus.
SCD3492 Rev C 7/10/07
Aeroflex Plainview
14
PIN DESCRIPTION (con’t)
Signal
Direction
Pin
TX/RX A1
TX/RX A2
BIDIR
D2
D1
Bus A Transmit/Receive - LOW output to the primary side of the
coupling transformer that connects to the A Channel of the 1553
Bus.
TX/RX B1
TX/RX B2
BIDIR
G1
G2
Bus B Transmit/Receive - HIGH output to the primary side of the
coupling transformer that connects to the B Channel of the 1553
Bus.
TX/RX B1
TX/RX B2
BIDIR
J1
J2
Bus B Transmit/Receive - LOW output to the primary side of the
coupling transformer that connects to the B Channel of the 1553
Bus.
+5VAA
+5VAB
POWER
E1
A2
+5V Input Power Supply connection for the A Channel Tranceiver
+5VBA
+5VBB
POWER
K2
F1
+5V Input Power Supply connection for the B Channel Tranceiver
VCC (Logic)
POWER
E10
+5V Input Power Supply connection for the Digital Protocol section.
GND A
POWER
C1
Power Supply return for the A Channel Tranceiver.
GND B
POWER
H1
Power Supply return for the B Channel Tranceiver.
DIGGND 1
DIGGND 2
POWER
F9
F10
Power Supply return for the Digital Protocol section.
Input
D4
Factory Test Point - Do not connect.
TEST
CASE
Signal Description
Connected to DIGGND1 and DIGGND2
SCD3492 Rev C 7/10/07
Aeroflex Plainview
15
NEXT
....
Data
Word
..
Status
Word
§
Command
Word
Status
Word
Data
Word
Data
Word
....
Data
Word
§
Command
Word
..
Status
Word
Data
Word
Data
Word
....
Data
Word
..
§
Command
Word
Controller to
RT Transfer
Receive
Command
Data
Word
Data
Word
RT to
Controller
Transfer
Transmit
Command
..
RT to RT
Transfer
Receive Transmit
Command Command
NEXT
NEXT
Mode Command
Without Data
Word
Status
Word
§
Command
Word
NEXT
Mode
Command
..
Status
Word
Mode Command
With Data
Word
(Transmit)
Mode
Command
..
Status
Word
Data
Word
§
Command
Word
Mode Command
With Data
Word
(Receive)
Mode
Command
Data
Word
..
Status
Word
§
Command
Word
NEXT
NEXT
NOTE:
§ = Intermessage Gap
. . = Response Time
Figure 1 – TYPICAL MESSAGE FORMATS
T/R
Bit
Mode Code
Function
Associated
Data Word
1
00000
Dynamic Bus Control
No
No
1
00001
Synchronize
No
Yes
1
00010
Transmit Status Word
No
No
1
00011
Initiate Self Test
No
Yes
1
00100
Transmitter Shutdown
No
Yes
1
00101
Override Transmitter Shutdown
No
Yes
1
00110
Inhibit Terminal Flag Bit
No
Yes
1
00111
Override lnhibit Terminal Flag Bit
No
Yes
1
01000
Reset Remote Terminal
No
Yes
1
01001
Reserved
No
TBD
↓
↓
↓
Broadcast Command
Allowed
↓
1
01111
Reserved
No
TBD
1
10000
Transmit Vector Word
Yes
No
0
10001
Synchronize
Yes
Yes
1
10010
Transmit Last Command
Yes
No
1
10011
Transmit BlTWord
Yes
No
0
10100
Selected Transmitter Shutdown
Yes
Yes
0
10101
Override Selected Transmitter
Shutdown
Yes
Yes
1 or 0
10110
Reserved
Yes
TBD
↓
1 or 0
11111
↓
↓
Reserved
Yes
↓
TBD
Figure 2 – ASSIGNED MODE CODES
SCD3492 Rev C 7/10/07
Aeroflex Plainview
16
SYNC
12
11
10
9
8
7
6
5
4
3
2
1
0
Bus 0 Shutdown
Broadcast Transmit Data Received
Word Count High
Word Count Low
REMOTE TERMINAL
ADDRESS
SCD3492 Rev C 7/10/07
17
1
1
1
1
1
1
1
1
1
Parity
RESERVED
Transmitter Timeout Flag
3
Terminal Flag
14
Subsystem Handshake Failure
13
Dynamic Bus Control Acceptance
DATA WORD
12
Loop Test Failure
SYNC
11
Subsystem Flag
10
Mode T/R Bit Wrong
9
Busy
8
Illegal Mode Command
7
Broadcast Command Received
COMMAND
WORD
6
Service Request
5
13
Bus 1 Shutdown
5
Instrumentation
STATUS
WORD
14
Bus 2 Shutdown
4
Message Error
SYNC
15
Bus 3 Shutdown
BIT WORD
Transmitter Timeout on Bus 0
SYNC
3
Transmitter Timeout on Bus 1
2
Transmitter Timeout on Bus 2
1
Transmitter Timeout on Bus 3
BIT TIMES
15
16
17
18
1
19
Note: T/R – Transmit/Receive
P – Parity
Figure 3 – WORD FORMATS
Aeroflex Plainview
20
5
1
5
5
1
REMOTE TERMINAL
ADDRESS
T/R
SUBADDRESS/MODE
DATA WORD
COUNT/MODE CODE
P
16
1
DATA
P
LSB
20
P
Transformer Coupled Stubs
TX/RX
STUB
ISOLATION
1 : 1.5
1 : 1.41
C
70Ω
55Ω
A
TX/RX
55Ω
Zoi
VCMT = ±10 VPK
DC to 2MHZ
Direct Coupled Stubs
STUB
TX/RX
55Ω
1 : 2.12
B
A
TX/RX
55Ω
Zoi
NOTES:
1. Point C, Vo = 18 Vpp Minimum
2. Transformer self Impedance ≥ 3KΩ at 1MHz
3. VCMT for transformer coupled stubs
VCMD for direct coupled stubs
35Ω
35Ω
+
±VCMD
-
Figure 4 – TRANCEIVER SIGNAL POINTS
SCD3492 Rev C 7/10/07
Aeroflex Plainview
18
SCD3492 Rev C 7/10/07
19
Aeroflex Plainview
L
VALID
PREVIOUS VALUE
PREVIOUS VALUE
WC 0-4
CWC 0-4
P
H
L
H
L
STATUS
CWC = 00001
DATA
DTAK = 0
PW1
TD2
Mid-Sync
Figure 5 – RT RECEIVE 1 WORD (NON MODE)
Mid-Parity
16 DATA BITS
CWC = 00000
VALID
PREVIOUS VALUE
TD1
SA 0-2
VALID
COMMAND
H
(Request Bus 1)
PREVIOUS VALUE
3-STATE WITH PULLUP
Mid-Sync
P DATA
SA 3-4
TD1
16 DATA BITS
PREVIOUS VALUE
CMD
TX/RX
IH 08-715
NDRQ
GBR
DTRQ
VALD
STATEN
INCMD
IUSTB
H/L
NBGT
REQBUS B
REQBUS A
RTO
EOT
DWSYNC
CMSYNC
Mid-Sync
POINT A
Fig 4
TRESP
STAT
16 DATA BITS
P
SCD3492 Rev C 7/10/07
20
Aeroflex Plainview
PREVIOUS VALUE
CWC 0-4
L
H
L
CWC = 00000
VALID
VALID
VALID
COMMAND STATUS
H
Mid-Sync
TD1
STAT
H
L
CWC = 00001
DATA
DTAK = 0
16 DATA BITS
PW1
P DATA
Figure 6 – RT TRANSMIT 1 WORD (NON MODE)
PREVIOUS VALUE
WC 0-4
PREVIOUS VALUE
SA 0-2
P
PREVIOUS VALUE
3-STATE WITH PULLUP
Mid-Parity
SA 3-4
PW1
16 DATA BITS
PREVIOUS VALUE
CMD
TX/RX
IH 08-715
NDRQ
DTRQ
STATEN
INCMD
IUSTB
H/L
NBGT
REQBUS B
REQBUS A
RTO
EOT
DWSYNC
CMSYNC
Mid-Sync
POINT A
Fig 4
TRESP
16 DATA BITS
TD2
TD1
Mid-Parity
P
PW2
SCD3492 Rev C 7/10/07
21
Aeroflex Plainview
P
L
CWC = 00000
PREVIOUS VALUE
CWC 0-4
DURING “SYNC NO DATA”
PW1
Mid-Parity
16 DATA BITS
DURING “RESET REMOTE TERMINAL”
STAT
P
Figure 7 – RT TRANSMIT MODE (NO DATA)
VALID
VALID
VALID
H
STATUS
PREVIOUS VALUE
PREVIOUS VALUE
SA 0-2
L
WC 0-4
PREVIOUS VALUE
H
COMMAND
TD2
PW1
Mid-Sync
(Request Bus 1)
SA 3-4
3-STATE WITH PULLUP
Mid-Parity
16 DATA BITS
PREVIOUS VALUE
CMD
TX/RX
IH 08-715
NDRQ
STATEN
SYNC
INCMD
RESET
IUSTB
H/L
NBGT
REQBUS B
REQBUS A
RTO
EOT
DBCREQ
CMSYNC
POINT A
Fig 4
TRESP
IF DBCACC = 0
TD1
SCD3492 Rev C 7/10/07
22
Aeroflex Plainview
Mid-Parity
L
H
L
Mid-Sync
VALID
PREVIOUS VALUE
PREVIOUS VALUE
WC 0-4
CWC 0-4
STAT
H
L
DATA
P DATA
INPUT DURING ‘TRANSMIT VECTOR‘ ONLY
ACTIVE DURING “TRANSMIT LAST COMMAND”
ACTIVE DURING “TRANSMIT BIT WORD’
16 DATA BITS
Figure 8 – RT TRANSMIT MODE (WITH DATA)
CWC = 00000
VALID
PREVIOUS VALUE
SA 0-2
VALID
COMMAND STATUS
H
(Request Bus 0)
PREVIOUS VALUE
P
SA 3-4
3-STATE WITH PULLUP
16 DATA BITS
PREVIOUS VALUE
CMD
TX/RX
IH 08-715
NDRQ
LSTCMD
BITEN
VECTEN
STATEN
INCMD
IUSTB
H/L
NBGT
REQBUS B
REQBUS A
RTO
EOT
DWSYNC
CMSYNC
POINT A
Fig 4
TRESP
16 DATA BITS
P
SCD3492 Rev C 7/10/07
23
Aeroflex Plainview
PREVIOUS VALUE
CWC 0-4
CWC = 00000
VALID
VALID
VALID
Mid-Parity
16 DATA BITS
PW1
P
H
L
DATA
L
STATUS
H
Mid-Sync
STAT
Figure 9 – RT RECEIVE MODE (WITH DATA )
PREVIOUS VALUE
PREVIOUS VALUE
SA 0-2
WC 0-4
PREVIOUS VALUE
SA 3-4
L
COMMAND
H
TD1
(Request Bus 0)
P DATA
3-STATE WITH PULLUP
16 DATA BITS
PREVIOUS VALUE
CMD
TX/RX
IH 08-715
NDRQ
SYNC
VALD
STATEN
INCMD
IUSTB
H/L
NBGT
REQBUS B
REQBUS A
RTO
EOT
DWSYNC
CMSYNC
POINT A
Fig 4
TRESP
16 DATA BITS
P
SCD3492 Rev C 7/10/07
24
Aeroflex Plainview
PREVIOUS VALUE
CWC(4:0)
PREVIOUS VALUE
16 DATA BITS
PREVIOUS VALUE
CMD1
WC(4:0)
SA(4:0)
GBR
STATEN
IH(7:0)
IUSTB
H/L
DTAK
DTRQ
NDRQ
INCMD
TX/RX
NBGT
REQBUSB
REQBUSA
RTO
EOT
DWSYNC
CMSYNC
POINT A
Fig 4
HL
P CMD2
VALID
VALID
VALID
3 STATE WITH PULLUP
16 DATA BITS
P
STAT2
16 DATA BITS
P DATA
16 DATA BITS
Figure 10 – RT RT to RT TRANSFER
4 to 12 µs
P
HL HL
TRESP
STAT1
16 DATA BITS
P
1553 BUS
DATA BITS
P
DATA WORD WHEN REQUIRED
MID PARITY – COMMAND WORD
TD1
REQBUS A
REQBUS B
TD2
NBGT
PW1
INCMD
H/L
TD3
TD4
IUSTB
PW2
PW2
TDSULOW
TDHLDHI
TDSUHI
IH08–715
TX/RX
TDHLDLO
3 STATE WITH PULLUP
HI
LO
COMMAND
PREVIOUS STATE
VALID
TD5
SA3–SA4
PREVIOUS STATE
VALID
TD5
SA0–SA2
WC0–WC4
PREVIOUS STATE
VALID
VALID
PREVIOUS STATE
TD6
CWC0–CWC4
PREVIOUS STATE
CWC = 00000
Figure 11 – COMMAND WORD TRANSFER (ALL)
SCD3492 Rev C 7/10/07
Aeroflex Plainview
25
SCD3492 Rev C 7/10/07
26
Aeroflex Plainview
CWC0–CWC4
IH08–715
IUSTB
H/L
GBR
STATEN
NDRQ
DTRQ
VALD
INCMD
PREVIOUS STATE
CWC0–CWC4
LOW
TDSUHI
TD5
PW1
CWC = 00000
COMMAND
HI
TD4
TD1
LOW
STATUS
HI
TDHLDLO
TDSULO
TD2
HI
LOW
TX DATA
TIED TO DTAK
CWC = 00001
TD3
HI
LOW
CWC
RX DATA
CWC = CWC + 1
LOW
STATUS
HI
PW1
TD1
Figure 13 – RT RECEIVE COMMAND SERVICE (NON-MODE)
3 STATE WITH PULLUP
TIED TO DTAK
Figure 12 – RT TRANSMIT COMMAND SERVICE (NON-MODE)
PREVIOUS STATE
3 STATE WITH PULLUP
TX/RX
IH08–715
IUSTB
H/L
STATEN
NDRQ
DTRQ
INCMD
NBGT
1.5µs Minimum
TX/RX
Previous command value
Valid
SA4-SA0
Previous command value
Valid
WC4-WC0
Previous command value
Valid
CWC4-CWC0
INCMD
INCLK
BUSY Latched here
Figure 14 – NEW COMMAND INITIALIZATION
SCD3492 Rev C 7/10/07
Aeroflex Plainview
27
DTRQ
TDHS
DTAK
TDHSHLD
H/L
TD1
IUSTB
TDSUHI
TDHLDHI
IH08-IH715
TDHLDLO
TDSULO
H
L
RX DATA
TD2
CWC3-CWC4
CWC
CWC=CWC+1
TRANSMIT
RECEIVE
H/L
TD1
IUSTB
TDSUHI
TDHLDHI
TDSULO
TDHLDLO
H
IH08-IH715
L
RX DATA
TD2
CWC3-CWC4
CWC
CWC=CWC+1
Figure 15 – DATA HANDSHAKE TRANSMIT / RECEIVE
SCD3492 Rev C 7/10/07
Aeroflex Plainview
28
SCD3492 Rev C 7/10/07
29
Aeroflex Plainview
CWC0-CWC4
TX/RX
IH08-715
IUSTB
H/L
STATEN
NDRQ
SYNC
INCMD
LOW
LOW
STATUS
HI
CWC = 00000
COMMAND
HI
PW2
PW1
Figure 16 – RT TRANSMIT MODE SERVICE (NO DATA)
PREVIOUS STATE
PREVIOUS STATE
3 STATE WITH PULLUP
TD2
TD1
INCMD
TD1
VECTEN
PW1
BITEN
LSTCMD
TD2
TD3
NDRQ
PW2
STATEN
TD4
H/L
TDSULO
TDHLDLO
IUSTB
TDSUHI
IH08-715
3 STATE WITH PULLUP
HI
LOW
HI
COMMAND
TX/RX
CWC0-CWC4
TDHLDHI
HI
LOW
STATUS
LOW
MODE DATA
PREVIOUS STATE
PREVIOUS STATE
CWC = 00000
Figure 17 – RT TRANSMIT MODE SERVICE (WITH DATA)
INCMD
VALD
NDRQ
STATEN
TD1
TD2
SYNC
H/L
TD3
IUSTB
TDSUHI
TDHLDHI
TDSULO
TDHLDLO
IH08-715
3 STATE WITH PULLUP
HI
LOW
MODE DATA
HI
LOW
STATUS
Figure 18 – RT RECEIVE MODE SERVICE (WITH DATA)
SCD3492 Rev C 7/10/07
Aeroflex Plainview
30
PARAMETRICS
Test Conditions:
Vcc = +5V± 10%, Vss = 0, RL(PULL-UP) = 1.6KΩ, RL(PULL-DOWN) = 5KΩ, CL = 20 pf (Including Test Jig)
TRANSMIT
(NON MODE) (See Figure 6)
Symbol
RECEIVE
(NON MODE) (See Figure 5)
Limits
Min
Max
Units
TRESP
10.5
11.75
µs
PW1
275
550
PW2
475
TD1
TD2
Limits
Symbol
Min
Max
Units
TRESP
9.0
10
µs
ns
PW1
875
1325
ns
525
ns
TD1
3.65
3.95
µs
6.5
7.0
µs
TD2
2.8
3.5
µs
18.5
19
µs
RECEIVE COMMAND SERVICE
(NON MODE) (See Figure 13)
TRANSMIT COMMAND SERVICE
(NON MODE) (See Figure 12)
Symbol
Limits
Min
Max
Units
PW1
1.4
1.6
µs
TD1
6.7
6.9
µs
TD2
10
75
ns
TD3
225
275
ns
TD4
1.7
1.8
µs
TD5
700
800
ns
Limits
Symbol
Min
Max
Units
PW1
400
600
ns
TD1
700
800
ns
DATA HANDSHAKE
(See Figure 15)
Symbol
Limits
Min
Max
Units
TDHS (TX)
0
13.5
µs
TDHSHLD
750
-
ns
TDSUHI
25
-
ns
TDHLDHI
25
-
ns
TDSULO
25
-
ns
TRANSMIT
COMMAND WORD TRANSFER
(ALL) (See Figure 11)
Symbol
Limits
Min
Max
Units
PW1
475
525
ns
TDHLDLO
25
-
ns
PW2
225
275
ns
TD1
675
800
ns
TD1
3.0
3.4
µs
TD2
50
-
ns
TD2
275
350
ns
RECEIVE
TD3
50
500
ns
TDHS (RX)
0
1.5
µs
TD4
450
550
ns
TDHSHLD
750
-
ns
TD5
-
75
ns
TDSUHI
400
-
ns
TD6
50
-
ns
TDHLDHI
150
-
ns
TDSUHI
400
-
ns
TDSULO
400
-
ns
TDHLDHI
150
-
ns
TDHLDLO
150
-
ns
TDSULO
400
-
ns
TD1
675
800
ns
TDHLDLO
150
-
ns
TD2
50
-
ns
SCD3492 Rev C 7/10/07
Aeroflex Plainview
31
PARAMETRICS con’t
Test Conditions:
Vcc = +5V± 10%, Vss = 0, RL(PULL-UP) = 1.6KΩ, RL(PULL-DOWN) = 5KΩ, CL = 20 pf (Including Test Jig)
RECEIVE MODE
(WITH DATA) (See Figure 9)
TRANSMIT MODE
(WITH DATA) (See Figure 8)
Symbol
TRESP
Limits
Min
Max
Units
9.5
10.5
µs
Symbol
Min
Max
Units
9.0
10
µs
PW1
21.75
23.0
µs
TD1
200
300
ns
TRESP
TRANSMIT MODE SERVICE
(WITH DATA) (See Figure 17)
Symbol
Limits
RECEIVE MODE SERVICE
(WITH DATA) (See Figure 18)
Limits
Min
Max
Units
PW1
1.4
1.6
µs
PW2
1.4
1.6
TD1
6.2
TD2
Symbol
Limits
Min
Max
Units
TD1
725
825
ns
µs
TD2
680
760
ns
6.3
µs
TD3
375
825
ns
400
600
ns
TDSUHI
400
-
ns
TD3
10
-
µs
TDHLDHI
150
-
ns
TD4
700
800
ns
TDSULO
400
-
ns
TDSUHI
-
100
ns
TDHLDLO
150
-
ns
TDHLDHI
0
-
ns
TDSULO
-
100
ns
TDHLDLO
0
-
ns
TRANSMIT MODE
(NO DATA) (See Figure 7)
Symbol
TRANSMIT MODE SERVICE
(NO DATA) (See Figure 16)
Limits
Min
Max
Units
TRESP
9.5
11
µs
PW1
400
600
TD1
600
TD2
150
Symbol
Limits
Min
Max
Units
PW1
2.45
2.55
µs
ns
PW2
1.4
1.6
µs
1000
ns
TD1
450
550
ns
275
ns
TD2
700
800
ns
SCD3492 Rev C 7/10/07
Aeroflex Plainview
32
SCD3492 Rev C 7/10/07
33
Aeroflex Plainview
CWC(4:0)
WC(4:0)
SA(4:0)
GBR
STATEN
IH(7:0)
IUSTB
H/L
DTAK
DTRQ
NDRQ
INCMD
TX/RX
INCLK
NBGT
CLOCK
CWC(4:0)
GBR
STATEN
IH(7:0)
IUSTB
H/L
DTAK
DTRQ
NDRQ
INCMD
INCLK
CLOCK
CMD LO
SA3,4 VALID
PREVIOUS
PREVIOUS
CMD HI
DATA LO
STAT HI
STAT LO
Figure 20 INCLK TIMING – TRANSMIT (DTAK DELAYED)
VALID
ALL VALID
STAT HI
BUSY sampled here (Both Transmit and Receive)
Figure 19 INCLK TIMING – RECEIVE (DTAK DELAYED)
DATA HI
DATA HI
STAT LO
DATA LO
SCD3492 Rev C 7/10/07
34
Aeroflex Plainview
PREVIOUS VALUE
WC(4:0)
CWC(4:0)
PREVIOUS VALUE
16 DATA BITS
3 STATE WITH PULLUP
CWC = 00000
WC = 00001
SA
COMMAND
HL
CMD
SA(4:0)
GBR
IH(7:0)
INCMD
DWEN
CWEN
RMDSTB
STATSTB
IUSTB
H/L
DTAK
DTRQ
NDRQ
NBGT
RTO
EOT
CMSYNC
DWSYNC
TX/RX
VALD
REQBUSB
REQBUSA
BCOPSTB
BCOPB
BCOPA
POINT A
Fig 4
RT/BC
4 TO 12 µs
STAT
16 DATA BITS
HL
STATUS
P DATA
Figure 21 – BC TRANSMIT 1 WORD (NON MODE)
P
16 DATA BITS
HL
DATA
CWC = CWC + 1
P
SCD3492 Rev C 7/10/07
35
Aeroflex Plainview
PREVIOUS VALUE
WC(4:0)
CWC(4:0)
PREVIOUS VALUE
CWC = 00000
WC = 00001
SA
H L
DATA
H L
CWC = CWC + 1
3 STATE WITH PULLUP
16 DATA BITS
COMMAND
CMD
SA(4:0)
IH(7:0)
INCMD
DWEN
CWEN
RMDSTB
STATSTB
IUSTB
H/L
DTAK
DTRQ
NDRQ
NBGT
RTO
EOT
CMSYNC
DWSYNC
TX/RX
VALD
REQBUSB
REQBUSA
BCOPSTB
BCOPB
BCOPA
RT/BC
POINT A
Fig 4
4 TO 12 µs
STAT
16 DATA BITS
P DATA
Figure 22 – BC RECEIVE 1 WORD (NON MODE)
P
16 DATA BITS
HL
STATUS
P
SCD3492 Rev C 7/10/07
36
Aeroflex Plainview
H L
PREVIOUS VALUE
PREVIOUS VALUE
PREVIOUS VALUE
WC(4:0)
CWC(4:0)
RT/BC = 0
CMD
COMMAND
SA(4:0)
GBR
IH(7:0)
INCMD
DWEN
CWEN
RMDSTB
STATSTB
H/L
IUSTB
DTRQ
DTAK
NDRQ
NBGT
RTO
EOT
CMSYNC
DWSYNC
TX/RX
VALD
REQBUSB
REQBUSA
BCOPSTB
BCOPB
BCOPA
POINT A
Fig 4
3 STATE WITH PULLUP
16 DATA BITS
4 TO 12 µs
STAT
16 DATA BITS
Figure 23 – BC TRANSMIT MODE (NO DATA)
P
P
H L
STATUS
SCD3492 Rev C 7/10/07
37
Aeroflex Plainview
HL
PREVIOUS VALUE
PREVIOUS VALUE
WC(4:0)
CWC(4:0)
RT/BC = 0
PREVIOUS VALUE
COMMAND
CMD
SA(4:0)
GBR
CWEN
DWEN
INCMD
IH(7:0)
RMDSTB
STATSTB
IUSTB
H/L
DTRQ
DTAK
NDRQ
NBGT
RTO
EOT
CMSYNC
DWSYNC
TX/RX
VALD
REQBUSB
REQBUSA
BCOPSTB
BCOPB
BCOPA
POINT A
Fig 4
P
3 STATE WITH PULLUP
16 DATA BITS
STAT
16 DATA BITS
STATUS
HL
P DATA
16 DATA BITS
Figure 24 – BC TRANSMIT MODE (WITH DATA)
4 TO 12 µs
P
HL
DATA
SCD3492 Rev C 7/10/07
38
Aeroflex Plainview
PREVIOUS VALUE
PREVIOUS VALUE
WC(4:0)
CWC(4:0)
RT/BC = 0
PREVIOUS VALUE
HL
DATA
HL
3 STATE WITH PULLUP
16 DATA BITS
COMMAND
CMD
SA(4:0)
GBR
IH(7:0)
INCMD
DWEN
CWEN
RMDSTB
STATSTB
H/L
IUSTB
DTRQ
DTAK
NDRQ
NBGT
RTO
EOT
CMSYNC
DWSYNC
TX/RX
VALD
REQBUSB
REQBUSA
BCOPSTB
BCOPB
BCOPA
POINT A
Fig 4
16 DATA BITS
P
4 to 12 µs
STAT
Figure 25 – BC RECEIVE MODE (WITH DATA)
P DATA
16 DATA BITS
HL
STATUS
P
SCD3492 Rev C 7/10/07
39
Aeroflex Plainview
H L
H L
PREVIOUS VALUE
CWC(4:0)
RT/BC = 0
PREVIOUS VALUE
PREVIOUS VALUE
WC = ?
SA = ?
16 DATA BITS P
3 STATE WITH PULLUP
16 DATA BITS P CMD2
COMMAND COMMAND
CMD1
WC(4:0)
GBR
SA(4:0)
IH(7:0)
INCMD
CWEN
DWEN
RMDSTB
STATSTB
IUSTB
DTAK
H/L
DTRQ
NDRQ
NBGT
RTO
EOT
DWSYNC
CMSYNC
TX/RX
VALD
REQBUSB
REQBUSA
BCOPSTB
BCOPB
BCOPA
POINT A
Fig 4
STAT2
16 DATA BITS P DATA
STATUS
H L
16 DATA BITS P
Figure 26 – BC RT TO RT TRANSFER
4 to 12 µs
STAT1
16 DATA BITS P
CWC = CWC + 1
DATA
H L
4 to 12 µs
H L
STATUS
SCD3492 Rev C 7/10/07
40
Aeroflex Plainview
IH(7:0)
RMDSTB
STATSTB
H/L
NBGT
RTO
EOT
DMSYNC
CMSYNC
TX/RX
VALD
REQBUSB
REQBUSA
BCOPB
BCOPA
PASMON
RT/BC
POINT A
Fig 4
CSYNC
3 STATE WITH PULLUP
DATA
L
COMMAND or
STATUS WORD
H
DSYNC
DATA
Figure 27 MONITOR MODE
P
P
H
L
DATA WORD
BCOP-A,BCOP-B
REQBUS-A,REQBUS-B
t3
t3
VALID
VALID
t4
t4
BCOPSTB
First
t1
t1
Second
t2
Limits:
250nS < t1 < 5µS
7µS < t2 < 17µS
t3 < 500nS
t4 > 1.5µS
Figure 28 – BCOP SEQUENCE TIMING
First or Only
BCOPSTB
Transfer Type
Second
BCOPSTB
BCOP-B
BCOP-A
BCOP-B
BCOP-A
Normal Data (BC to RT / RT to BC)
0
0
N/A
N/A
RT to RT
0
1
0
0
Mode Codes (No Data)
0
1
N/A
N/A
0
1
1
1
0
1
1
0
[T/R = 0]
00h
01h
02h
03h
04h
05h
06h
07h
08h
Dynamic Bus Control
Synchronize (No DATA)
Transmit Status
Initiate Self Test
Transmitter Shutdown
Override TX Shutdown
Inhibit TF Flag
Override Inhibit TF Flag
Reset Remote Terminal
Mode Codes (Data RT to BC)
[T/R = 1]
10h Transmit Vector Word
12h Transmit Last Command
13h Transmit Bit Word
Mode Codes (Data BC to RT)
[T/R = 0]
11h Synchronize (With DATA)
14h Selected TX Shutdown
15h Override Selected TX Shutdown
Table 1 – BCOP SEQUENCES
SCD3492 Rev C 7/10/07
Aeroflex Plainview
41
SCD3492 Rev C 7/10/07
42
Aeroflex Plainview
LOW BYTE DATA
LOW DATA CLOCK
HIGH DATA CLOCK
HIGH BYTE DATA
4
3
0
14
5
7
4
3
2
1
0
Q0
Q1
Q2
Q8
Q4
Q5
Q6
Q7
Q0
Q1
Q2
Q8
Q4
Q5
Q6
Q7
GND VCC
OE
D0
D1
D2
D3
D4
D5
D6
D7
GND VCC
OE
D0
D1
D2
D3
D4
D5
D6
D7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
20
+Vcc
2
5
6
9
12
15
16
19
20
+Vcc
2
5
6
9
12
15
16
19
0
1
2
3
4
5
6
7
DTAK may be connected to
DTRQ, Ground or controlled
DTRQ (K10) or
VECTEN (G8)
H/L (J9)
TX/RX (H10)
ACT3492
IH715 (C9)
IH614 (D9)
IH513 (B9)
IH412 (D8)
IH311 (A9)
IH210 (D7)
IH19 (D6)
IH08 (E9)
Figure 29 TYPICAL TRANSMIT DATA INTERFACE
10
11
1
8
3
13
17
6
4
18
7
10
11
1
7
1
13
4
2
14
5
8
17
6
3
18
7
SCD3492 Rev C 7/10/07
43
Aeroflex Plainview
LOW BYTE ENABLE
LOW BYTE DATA
HIGH BYTE ENABLE
HIGH BYTE DATA
16
15
12
6
5
4
6
5
2
2
1
0
16
15
12
6
5
4
6
5
2
2
1
0
OE
D0
D1
D2
D3
D4
D5
D6
D7
OE
D0
D1
D2
D3
D4
D5
D6
D7
GND VCC
Q0
Q1
Q2
Q8
Q4
Q5
Q6
Q7
GND VCC
Q0
Q1
Q2
Q8
Q4
Q5
Q6
Q7
10
3
11
1
4
7
8
13
14
17
18
10
3
11
1
4
7
8
13
14
17
18
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Figure 30 TYPICAL RECEIVE DATA INTERFACE
20
9
3
+Vcc
19
7
20
9
3
+Vcc
19
7
DTAK may be connected to
DTRQ, Ground or controlled
ACT3492
TX/RX (H10)
SYNC (G7) or
DTRQ (K10)
IUSTB (G6)
H/L (J9)
IH715 (C9)
IH614 (D9)
IH513 (B9)
IH412 (D8)
IH311 (A9)
IH210 (D7)
IH19 (D6)
IH08 (E9)
PACKAGE PIN OUT DESCRIPTION BY PIN - ACT3492
Pin #
Function
Pin #
Function
Pin #
Function
A1
RTADER
D5
LSTCMD/CWEN
G9
NBGT
A2
+5VAB
D6
IH19
G10
INCLK
A3
SERVREQ
D7
IH210
H1
GNDB
A4
WC4
D8
IH412
H2
SA4
A5
SSERR
D9
IH614
H3
DRVINH
A6
WC2
D10
NDRQ
H4
CWC0
A7
LTEN
E1
+5VAA
H5
RTAD3
A8
LTTRIG
E2
LTFAIL
H6
REQBUSB
A9
IH311
E3
MANER
H7
SA2
A10
NEXTSTAT
E4
6MCK
H8
CWC1
B1
TXRX A2
E5
REQBUSA
H9
EOT
B2
TXRX A1
E6
STATUPDATE
H10
TX/RX
B3
DBCACC
E7
ENABLE
J1
TXRX B1
B4
RT/BC
E8
MEREQ
J2
TXRX B2
B5
HSFAIL
E9
IH08
J3
PASS
B6
WC3
E10
+5V LOGIC
J4
BITDECODE
B7
WC0
F1
+5VBB
J5
RTAD2
B8
MASTER RESET
F2
ERROR
J6
RTADPAR
B9
IH513
F3
RTO
J7
GBR
B10
BCOPA
F4
RTAD4
J8
CWC3
C1
GNDA
F5
BCSTEN 1
J9
H/L
C2
VALD
F6
DTAK
J10
SA0
C3
TXTO
F7
BCOPSTB
K1
CWC4
C4
RESET
F8
PASMON
K2
+5VBA
C5
DBCREQ
F9
DIG GND 1 / CASE
K3
SA3
C6
BITEN/RMDSTB
F10
DIG GND 2 / CASE
K4
CWC2
C7
BUSY
G1
TXRX B1
K5
RTAD1
C8
WC1
G2
TXRX B2
K6
RTAD0
C9
IH715
G3
DWSYNC
K7
STATEN/STATSTB
C10
BCOPB
G4
CMSYNC
K8
SA1
D1
TXRX A2
G5
BCSTEN 0
K9
INCMD
D2
TXRX A1
G6
IUSTB
K10
DTRQ
D3
PARER
G7
SYNC
D4
TEST
G8
VECTEN/DWEN
SCD3492 Rev C 7/10/07
Aeroflex Plainview
44
PACKAGE PIN OUT DESCRIPTION BY FUNCTION - ACT3492
Function
Pin #
Function
Pin #
Function
Pin #
+5VAA
E1
H/L
J9
RTAD4
F4
+5VAB
A2
HSFAIL
B5
RTADER
A1
+5VBA
K2
IH08
E9
RTADPAR
J6
+5VBB
F1
IH19
D6
RTO
F3
+5V LOGIC
E10
IH210
D7
SA0
J10
6MCK
E4
IH311
A9
SA1
K8
BCOPA
B10
IH412
D8
SA2
H7
BCOPB
C10
IH513
B9
SA3
K3
BCOPSTB
F7
IH614
D9
SA4
H2
BCSTEN 0
G5
IH715
C9
SERVREQ
A3
BCSTEN 1
F5
INCLK
G10
SSERR
A5
BITDECODE
J4
INCMD
K9
STATEN/STATSTB
K7
BITEN/RMDSTB
C6
IUSTB
G6
STATUPDATE
E6
BUSY
C7
LSTCMD/CWEN
D5
SYNC
G7
CMSYNC
G4
LTEN
A7
TEST
D4
CWC0
H4
LTFAIL
E2
TX/RX
H10
CWC1
H8
LTTRIG
A8
TXRX A1
B2
CWC2
K4
MANER
E3
TXRX A2
B1
CWC3
J8
MASTER RESET
B8
TXRX B1
G1
CWC4
K1
MEREQ
E8
TXRX B2
G2
DBCACC
B3
NBGT
G9
TXRX A1
D2
DBCREQ
C5
NDRQ
D10
TXRX A2
D1
DIG GND 1 / CASE
F9
NEXTSTAT
A10
TXRX B1
J1
DIG GND 2 / CASE
F10
PARER
D3
TXRX B2
J2
DRVINH
H3
PASMON
F8
TXTO
C3
DTAK
F6
PASS
J3
VALD
C2
DTRQ
K10
REQBUSA
E5
VECTEN/DWEN
G8
DWSYNC
G3
REQBUSB
H6
WC0
B7
ENABLE
E7
RESET
C4
WC1
C8
EOT
H9
RT/BC
B4
WC2
A6
ERROR
F2
RTAD0
K6
WC3
B6
GBR
J7
RTAD1
K5
WC4
A4
GNDA
C1
RTAD2
J5
GNDB
H1
RTAD3
H5
SCD3492 Rev C 7/10/07
Aeroflex Plainview
45
CERAMIC COFIRED 100-Pin PGA PACKAGE OUTLINE
Pin A1 & ESD
Designator
.040 REF 45°
CHAMFER BRAZE RING
.020 REF 45°
CHAMFER 4X
.065 SQ
.065 DIA TYP
1
2
3
.100
TYP
4
5
SQ
.900 1.060
±.015
6
7
8
9
10
A
B
C
D
E
F
G
H
J
K
Standoffs
Pins B2, J2, B9 & J9
.160
MAX
.050
±.005
.050
4X
.018
±.002
SCD3492 Rev C 7/10/07
.180
±.010
Aeroflex Plainview
46
ORDERING INFORMATION
Model Number
DESC Part Number
ACT3492
Package
Pending
1.06" x 1.06" Ceramic 100-pin
PGA Plug In
Notes
1. Contact factory for extended military temperature range products
2. The ACT3492 can be used as a 100-pin equivalent to the 12MHz BUS-65600 DDC part. Please refer to the CT2565 data sheet for a
form-fit-functional replacement to the discontinued DDC BUS-65600.
3. Contact the factory for a 100-pin equivalent to the 16MHz, BC/RT/MT, BUS-65610 MIL-STD-1553 terminal.
PART NUMBER BREAKDOWN
ACT 3492 – I
Screening
ACT Series
I = Industrial Temp, -40°C to +85°C
R = Extended Temp, -55°C to +110°C Note 1
T = Military Temp, -55°C to +125°C
Blank = Military Temp, -55°C to +125°C, Screened *
Base
* Screened to the individual test methods of MIL-STD-883
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Tel: 719-594-8017
Fax: 719-594-8468
www.aeroflex.com
[email protected]
Aeroflex Microelectronic Solutions reserves the right to
change at any time without notice the specifications, design,
function, or form of its products described herein. All
parameters must be validated for each customer's application
by engineering. No liability is assumed as a result of use of
this product. No patent licenses are implied.
Our passion for performance is defined by three
attributes represented by these three icons:
solution-minded, performance-driven and customer-focused
SCD3492 Rev C 7/10/07
47
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