DATASHEET

HD-6409
Data Sheet
October 1, 2015
CMOS Manchester Encoder-Decoder
Features
The HD-6409 Manchester Encoder-Decoder (MED) is a high
speed, low power device manufactured using self-aligned
silicon gate technology. The device is intended for use in
serial data communication, and can be operated in either of
two modes. In the converter mode, the MED converts Non
return-to-Zero code (NRZ) into Manchester code and
decodes Manchester code into Nonreturn-to-Zero code. For
serial data communication, Manchester code does not have
some of the deficiencies inherent in Nonreturn-to-Zero code.
For instance, use of the MED on a serial line eliminates DC
components, provides clock recovery, and gives a relatively
high degree of noise immunity. Because the MED converts
the most commonly used code (NRZ) to Manchester code,
the advantages of using Manchester code are easily realized
in a serial data link.
• Converter or Repeater Mode
FN2951.4
• Independent Manchester Encoder and Decoder
Operation
• Static to One Megabit/sec Data Rate Guaranteed
• Low Bit Error Rate
• Digital PLL Clock Recovery
• On Chip Oscillator
• Low Operating Power: 50mW Typical at +5V
• Pb-Free Available (RoHS Compliant)
Pinout
HD-6409
(20 LD PDIP, SOIC)
TOP VIEW
In the Repeater mode, the MED accepts Manchester code
input and reconstructs it with a recovered clock. This
minimizes the effects of noise on a serial data link. A digital
phase lock loop generates the recovered clock. A maximum
data rate of 1MHz requires only 50mW of power.
Manchester code is used in magnetic tape recording and in
fiber optic communication, and generally is used where data
accuracy is imperative. Because it frames blocks of data, the
HD-6409 easily interfaces to protocol controllers.
BZI
1
20 VCC
BOI
2
19 BOO
UDI
3
18 BZO
SD/CDS
4
17 SS
SDO
5
16 ECLK
SRST
6
15 CTS
NVM
7
14 MS
DCLK
8
13 OX
RST
9
12 IX
GND 10
11 CO
Ordering Information
PART NUMBER
(1 MEGABIT/SEC)
PART MARKING
TEMP. RANGE
(°C)
PACKAGE
PKG. DWG. #
HD3-6409-9
HD3-6409-9
-40 to +85
20 Ld PDIP
E20.3
HD3-6409-9Z (Notes 2, 3)
HD3-6409-9Z
-40 to +85
20 Ld PDIP (Pb-free)
E20.3
HD9P6409-9Z (Notes 2, 3)
HD9P6409-9Z
-40 to +85
20 Ld SOIC (Pb-free)
M20.3
HD9P6409-9Z96 (Notes 1, 2, 3)
HD9P6409-9Z
-40 to +85
20 Ld SOIC Tape & Reel
(Pb-free)
M20.3
NOTES:
1. “96” suffix is for tape and reel. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100%
matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations).
Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC
J STD-020.
3. Pb-free PDIPs can be used for through hole wave solder processing only. They are not intended for use in Reflow solder processing applications.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas LLC
Copyright Intersil Americas LLC 1997, 2005, 2008, 2015. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
HD-6409
Block Diagram
SDO
NVM
BOO
BOI
BZI
DATA
INPUT
LOGIC
5-BIT SHIFT
REGISTER
AND DECODER
UDI
OUTPUT
SELECT
LOGIC
COMMAND
SYNC
GENERATOR
EDGE
DETECTOR
BZO
CTS
SRST
RST
RESET
SD
SD/CDS
INPUT/
OUTPUT
SELECT
MANCHESTER
ENCODER
MS
IX
OX
OSCILLATOR
ECLK
DCLK
COUNTER
CIRCUITS
CO
SS
Logic Symbol
SS
CO
SD/CDS
ECLK
17
11
CLOCK
GENERATOR
4
16
ENCODER
MS
RST
SDO
DCLK
NVM
SRST
2
14
9
12
OX
IX
19
18
15
BOO
BZO
CTS
CONTROL
2
1
3
5
8
7
6
13
BOI
BZI
UDI
DECODER
FN2951.4
October 1, 2015
HD-6409
Pin Descriptions
PIN
NUMBER
TYPE
SYMBOL
1
I
BZl
Bipolar Zero Input
Used in conjunction with pin 2, Bipolar One Input (BOl), to input Manchester II encoded
data to the decoder, BZI and BOl are logical complements. When using pin 3, Unipolar
Data Input (UDI) for data input, BZI must be held high.
2
I
BOl
Bipolar One Input
Used in conjunction with pin 1, Bipolar Zero Input (BZI), to input Manchester II encoded
data to the decoder, BOI and BZI are logical complements. When using pin 3, Unipolar
Data Input (UDI) for data input, BOl must be held low.
3
I
UDI
Unipolar Data Input
An alternate to bipolar input (BZl, BOl), Unipolar Data Input (UDl) is used to input
Manchester II encoded data to the decoder. When using pin 1 (BZl) and pin 2 (BOl) for
data input, UDI must be held low.
4
I/O
SD/CDS
5
O
SDO
Serial Data Out
The decoded serial NRZ data is transmitted out synchronously with the decoder clock
(DCLK). SDO is forced low when RST is low.
6
O
SRST
Serial Reset
In the converter mode, SRST follows RST. In the repeater mode, when RST goes low,
SRST goes low and remains low after RST goes high. SRST goes high only when RST
is high, the reset bit is zero, and a valid synchronization sequence is received.
7
O
NVM
Nonvalid Manchester
A low on NVM indicates that the decoder has received invalid Manchester data and
present data on Serial Data Out (SDO) is invalid. A high indicates that the sync pulse and
data were valid and SDO is valid. NVM is set low by a low on RST, and remains low after
RST goes high until valid sync pulse followed by two valid Manchester bits is received.
8
O
DCLK
Decoder Clock
The decoder clock is a 1X clock recovered from BZl and BOl, or UDI to synchronously
output received NRZ data (SDO).
9
I
RST
Reset
In the converter mode, a low on RST forces SDO, DCLK, NVM, and SRST low. A high on
RST enables SDO and DCLK, and forces SRST high. NVM remains low after RST goes
high until a valid sync pulse followed by two Manchester bits is received, after which it
goes high. In the repeater mode, RST has the same effect on SDO, DCLK and NVM as
in the converter mode. When RST goes low, SRST goes low and remains low after RST
goes high. SRST goes high only when RST is high, the reset bit is zero and a valid
synchronization sequence is received.
10
I
GND
Ground
Ground
NAME
DESCRIPTION
Serial Data/Command In the converter mode, SD/CDS is an input used to receive serial NRZ data. NRZ data is
Data Sync
accepted synchronously on the falling edge of encoder clock output (ECLK). In the
repeater mode, SD/CDS is an output indicating the status of last valid sync pattern
received. A high indicates a command sync and a low indicates a data sync pattern.
11
O
CO
Clock Output
Buffered output of clock input IX. May be used as clock signal for other peripherals.
12
I
IX
Clock Input
IX is the input for an external clock or, if the internal oscillator is used, IX and OX are used
for the connection of the crystal.
13
O
OX
Clock Drive
If the internal oscillator is used, OX and IX are used for the connection of the crystal.
14
I
MS
Mode Select
MS must be held low for operation in the converter mode, and high for operation in the
repeater mode.
15
I
CTS
Clear to Send
In the converter mode, a high disables the encoder, forcing outputs BOO, BZO high and
ECLK low. A high to low transition of CTS initiates transmission of a Command sync pulse.
A low on CTS enables BOO, BZO, and ECLK. In the repeater mode, the function of CTS
is identical to that of the converter mode with the exception that a transition of CTS does
not initiate a synchronization sequence.
16
O
ECLK
Encoder Clock
In the converter mode, ECLK is a 1X clock output used to receive serial NRZ data to
SD/CDS. In the repeater mode, ECLK is a 2X clock which is recovered from BZl and BOl
data by the digital phase locked loop.
17
I
SS
Speed Select
A logic high on SS sets the data rate at 1/32 times the clock frequency while a low sets
the data rate at 1/16 times the clock frequency.
18
O
BZO
Bipolar Zero Output
BZO and its logical complement BOO are the Manchester data outputs of the encoder.
The inactive state for these outputs is in the high state.
19
O
BOO
Bipolar One Out
See pin 18.
20
I
VCC
VCC
VCC is the +5V power supply pin. A 0.1µF decoupling capacitor from VCC (pin 20) to GND
(pin 10) is recommended.
NOTE:
(I) Input
(O) Output
3
FN2951.4
October 1, 2015
HD-6409
CTS
1
ECLK
DON’T CARE
SD/CDS
‘1’
‘0’
‘1’
‘1’
‘0’ ‘1’
BZO
2 0
0
0
0
0
0
0
0 3
4
BOO
EIGHT “0’s”
COMMAND
SYNC
SYNCHRONIZATION SEQUENCE
tCE5
tCE6
FIGURE 1. ENCODER OPERATION
Encoder Operation
The encoder uses free running clocks at 1X and 2X the data
rate derived from the system clock lX for internal timing. CTS
is used to control the encoder outputs, ECLK, BOO and
BZO. A free running 1X ECLK is transmitted out of the
encoder to drive the external circuits which supply the NRZ
data to the MED at pin SD/CDS.
A low on CTS enables encoder outputs ECLK, BOO and
BZO, while a high on CTS forces BZO, BOO high and holds
ECLK low. When CTS goes from high to low 1 , a
synchronization sequence is transmitted out on BOO and
BZO. A synchronization sequence consists of eight
Manchester “0” bits followed by a command sync pulse. 2
A command sync pulse is a 3-bit wide pulse with the first 1
1/2 bits high followed by 1 1/2 bits low. 3 Serial NRZ data is
clocked into the encoder at SD/CDS on the high to low
transition of ECLK during the command sync pulse. The
NRZ data received is encoded into Manchester II data and
transmitted out on BOO and BZO following the command
sync pulse. 4 Following the synchronization sequence,
input data is encoded and transmitted out continuously
without parity check or word framing. The length of the data
block encoded is defined by CTS. Manchester data out is
inverted.
Decoder Operation
The decoder requires a single clock with a frequency 16X or
32X the desired data rate. The rate is selected on the speed
select with SS low producing a 16X clock and high a 32X
clock. For long data links the 32X mode should be used as
this permits a wider timing jitter margin. The internal
operation of the decoder utilizes a free running clock
synchronized with incoming data for its clocking.
Zero inputs will accept data from differential inputs such as a
comparator sensed transformer coupled bus. The Unipolar
Data input can only accept noninverted Manchester II
encoded data i.e. Bipolar One Out through an inverter to
Unipolar Data Input. The decoder continuously monitors this
data input for valid sync pattern. Note that while the MED
encoder section can generate only a command sync pattern,
the decoder can recognize either a command or data sync
pattern. A data sync is a logically inverted command sync.
There is a three bit delay between UDI, BOl, or BZI input and
the decoded NRZ data transmitted out of SDO.
Control of the decoder outputs is provided by the RST pin.
When RST is low, SDO, DCLK and NVM are forced low.
When RST is high, SDO is transmitted out synchronously
with the recovered clock DCLK. The NVM output remains
low after a low to high transition on RST until a valid sync
pattern is received.
The decoded data at SDO is in NRZ format. DCLK is
provided so that the decoded bits can be shifted into an
external register on every high to low transition of this clock.
Three bit periods after an invalid Manchester bit is received
on UDI, or BOl, NVM goes low synchronously with the
questionable data output on SDO. FURTHER, THE
DECODER DOES NOT RE-ESTABLISH PROPER DATA
DECODING UNTIL ANOTHER SYNC PATTERN IS
RECOGNIZED.
The Manchester II encoded data can be presented to the
decoder in either of two ways. The Bipolar One and Bipolar
4
FN2951.4
October 1, 2015
HD-6409
DCLK
UDI
COMMAND
SYNC
1
0
0
1
0
1
0
1
0
1
0
1
0
SDO
RST
NVM
FIGURE 2. DECODER OPERATION
A low on CTS enables ECLK, BOO, and BZO. In contrast to
the converter mode, a transition on CTS does not initiate a
synchronization sequence of eight 0’s and a command sync.
The repeater mode does recognize a command or data sync
pulse. SD/CDS is an output which reflects the state of the
most recent sync pulse received, with high indicating a
command sync and low indicating a data sync.
Repeater Operation
Manchester Il data can be presented to the repeater in either
of two ways. The inputs Bipolar One In and Bipolar Zero In
will accept data from differential inputs such as a comparator
or sensed transformer coupled bus. The input Unipolar Data
In accepts only noninverted Manchester II coded data. The
decoder requires a single clock with a frequency 16X or 32X
the desired data rate. This clock is selected to 16X with
Speed Select low and 32X with Speed Select high. For long
data links the 32X mode should be used as this permits a
wider timing jitter margin.
When RST is low, the outputs SDO, DCLK, and NVM are
low, and SRST is set low. SRST remains low after RST goes
high and is not reset until a sync pulse and two valid
manchester bits are received with the reset bit low. The reset
bit is the first data bit after the sync pulse. With RST high,
NRZ Data is transmitted out of Serial Data Out
synchronously with the 1X DCLK.
The inputs UDl, or BOl, BZl are delayed approximately 1/2
bit period and repeated as outputs BOO and BZO. The 2X
ECLK is transmitted out of the repeater synchronously with
BOO and BZO.
INPUT
COUNT
1
2
3
4
5
6
7
ECLK
SYNC PULSE
UDI
BZO
BOO
RST
SRST
FIGURE 3. REPEATER OPERATION
5
FN2951.4
October 1, 2015
HD-6409
must be re-established. This places relatively stringent
requirements on the incoming data.
Manchester Code
Nonreturn-to-Zero (NRZ) code represents the binary values
logic-O and Iogic-1 with a static level maintained throughout
the data cell. In contrast, Manchester code represents data
with a level transition in the middle of the data cell.
Manchester has bandwidth, error detection, and
synchronization advantages over NRZ code.
The synchronization advantages of using the HD-6409 and
Manchester code are several fold. One is that Manchester is
a self clocking code. The clock in serial data communication
defines the position of each data cell. Non self clocking
codes, as NRZ, often require an extra clock wire or clock
track (in magnetic recording). Further, there can be a phase
variation between the clock and data track. Crosstalk
between the two may be a problem. In Manchester, the
serial data stream contains both the clock and the data, with
the position of the mid bit transition representing the clock,
and the direction of the transition representing data. There is
no phase variation between the clock and the data.
The Manchester II code Bipolar One and Bipolar Zero shown
below are logical complements. The direction of the
transition indicates the binary value of data. A logic-0 in
Bipolar One is defined as a Low to high transition in the
middle of the data cell, and a logic-1 as a high to low mid bit
transition, Manchester Il is also known as Biphase-L code.
The bandwidth of NRZ is from DC to the clock frequency fc/2,
while that of Manchester is from fc/2 to fc. Thus, Manchester
can be AC or transformer coupled, which has considerable
advantages over DC coupling. Also, the ratio of maximum to
minimum frequency of Manchester extends one octave, while
the ratio for NRZ is the range of 5 to 10 octaves. It is much
easier to design a narrow band than a wideband amp.
A second synchronization advantage is a result of the
number of transitions in the data. The decoder
resynchronizes on each transition, or at least once every
data cell. In contrast, receivers using NRZ, which does not
necessarily have transitions, must resynchronize on frame
bit transitions, which occur far less often, usually on a
character basis. This more frequent resynchronization
eliminates the cumulative effect of errors over successive
data cells. A final synchronization advantage concerns the
HD-6409’s sync pulse used to initiate synchronization. This
three bit wide pattern is sufficiently distinct from Manchester
data that a false start by the receiver is unlikely.
Secondly, the mid bit transition in each data cell provides the
code with an effective error detection scheme. If noise
produces a logic inversion in the data cell such that there is
no transition, an error indiction is given, and synchronization
BIT PERIOD
1
2
3
4
5
BINARY CODE
0
1
1
0
0
NONRETURN
TO ZERO
BIPOLAR ONE
BIPOLAR ZERO
FIGURE 4. MANCHESTER CODE
Crystal Oscillator Mode
LC Oscillator Mode
C1
IX
C0
R1
16MHz
X1
C1 = 32pF
C0 = CRYSTAL + STRAY
X1 = AT CUT PARALLEL
RESONANCE
FUNDAMENTAL
MODE
RS (TYP) = 30
OX R1 = 15M
C1
IX
C1 = 20pF
C0 = 5pF
C1
CO
FIGURE 5. CRYSTAL OSCILLATOR MODE
6
C1 – 2C0
C E  -------------------------2
L
OX
1
f O  ----------------------2 LC
e
C1
FIGURE 6. LC OSCILLATOR MODE
FN2951.4
October 1, 2015
HD-6409
Using the 6409 as a Manchester Encoded UART
BIPOLAR IN
BZI
VCC
BIPOLAR IN
BOI
BOO
BIPOLAR OUT
UDI
BZO
BIPOLAR OUT
SD/CDS
SDO
RESET
SS
ECLK
SRST
CTS
NVM
MS
DCLK
OX
RST
IX
GND
CO
CTS
LOAD
A
CP
B
CK
‘164
DATA IN
‘273
QH
A
B
CK
‘164
DATA IN
‘273
CK
LOAD
‘165
QH
SI CK LOAD QH
‘165
PARALLEL DATA IN
PARALLEL DATA OUT
FIGURE 7. MANCHESTER ENCODER UART
7
FN2951.4
October 1, 2015
HD-6409
Absolute Maximum Ratings
Thermal Information
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7.0V
Input, Output or I/O Voltage . . . . . . . . . . . . GND -0.5V to VCC +0.5V
ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 1
Thermal Resistance (Typical, Note 4)
JA (°C/W)
JC (°C/W)
PDIP Package . . . . . . . . . . . . . . . . . . .
75
N/A
SOIC Package . . . . . . . . . . . . . . . . . . .
100
N/A
Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°C
Maximum Junction Temperature
Ceramic Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +175°C
Plastic Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
*Pb-free PDIPs can be used for through hole wave solder
processing only. They are not intended for use in Reflow solder
processing applications.
Operating Conditions
Operating Temperature Range . . . . . . . . . . . . . . . . .-40°C to +85°C
Operating Voltage Range. . . . . . . . . . . . . . . . . . . . . . +4.5V to +5.5V
Input Rise and Fall Times . . . . . . . . . . . . . . . . . . . . . . . . . 50ns Max
Sync. Transition Span (t2) . . . . . . . . . .1.5 DBP Typical, (Notes 1, 2)
Short Data Transition Span (t4) . . . . . . 0.5DBP Typical, (Notes 1, 2)
Long Data Transition Span (t5) . . . . . . 1.0DBP Typical, (Notes 1, 2)
Zero Crossing Tolerance (tCD5) . . . . . . . . . . . . . . . . . . . . . (Note 3)
Die Characteristics
Gate Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250 Gates
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTES:
1. DBP-Data Bit Period, Clock Rate = 16X, one DBP = 16 Clock Cycles; Clock Rate = 32X, one DBP = 32 Clock Cycles.
2. The input conditions specified are nominal values, the actual input waveforms transition spans may vary by 2 IX clock cycles (16X mode) or 6
IX clock cycles (32X mode).
3. The maximum zero crossing tolerance is 2 IX clock cycles (16X mode) or 6 IX clock cycles (32 mode) from the nominal.
4. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Common Electrical Specifications
Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified.
Temperature limits established by characterization and are not production tested.
DC Electrical Specifications VCC = 5.0V10%, TA = -40°C to +85°C (HD-6409-9).
SYMBOL
TEST CONDITIONS
(Note 5)
PARAMETER
MIN
MAX
UNITS
VIH
Logical “1” Input Voltage
VCC = 4.5V
70% VCC
-
V
VIL
Logical “0” Input Voltage
VCC = 4.5V
-
20% VCC
V
VIHR
Logic “1” Input Voltage (Reset)
VCC = 5.5V
VCC -0.5
-
V
VILR
Logic “0” Input Voltage (Reset)
VCC = 4.5V
-
GND +0.5
V
VIHC
Logical “1” Input Voltage (Clock)
VCC = 5.5V
VCC -0.5
-
V
VILC
Logical “0” Input Voltage (Clock)
VCC = 4.5V
-
GND +0.5
V
II
Input Leakage Current (Except IX)
VIN = VCC or GND, VCC = 5.5V
-1.0
+1.0
A
II
Input Leakage Current (IX)
VIN = VCC or GND, VCC = 5.5V
-20
+20
A
IO
I/O Leakage Current
VOUT = VCC or GND, VCC = 5.5V
-10
+10
A
VOH
Output HIGH Voltage (All Except OX)
IOH = -2.0mA, VCC = 4.5V (Note 6)
VCC -0.4
-
V
VOL
Output LOW Voltage (All Except OX)
IOL = +2.0mA, VCC = 4.5V (Note 6)
-
0.4
V
ICCSB
Standby Power Supply Current
VIN = VCC or GND, VCC = 5.5V,
Outputs Open
-
100
A
ICCOP
Operating Power Supply Current
f = 16.0MHz, VIN = VCC or GND
VCC = 5.5V, CL = 50pF
-
18.0
mA
Functional Test
(Note 5)
-
-
-
FT
NOTES:
5. Tested as follows: f = 16MHz, VIH = 70% VCC, VIL = 20% VCC, VOH  VCC/2, and VOL VCC/2, VCC = 4.5V and 5.5V.
6. Interchanging of force and sense conditions is permitted
8
FN2951.4
October 1, 2015
HD-6409
Capacitance TA = +25°C, Frequency = 1MHz.
SYMBOL
CIN
COUT
PARAMETER
Input Capacitance
TEST CONDITIONS
All measurements are referenced to device GND
Output Capacitance
TYP
UNITS
10
pF
12
pF
AC Electrical Specifications VCC = 5.0V 10%, TA = -40°C to +85°C (HD-6409-9).
SYMBOL
PARAMETER
TEST CONDITIONS
(Note 7)
MIN
MAX
UNITS
fC
Clock Frequency
-
-
16
MHz
tC
Clock Period
-
1/fC
-
sec
t1
Bipolar Pulse Width
-
tC+10
-
ns
t3
One-Zero Overlap
-
-
tC-10
ns
tCH
Clock High Time
f = 16.0MHz
20
-
ns
tCL
Clock Low Time
f = 16.0MHz
20
-
ns
tCE1
Serial Data Setup Time
-
120
-
ns
tCE2
Serial Data Hold Time
-
0
-
ns
tCD2
DCLK to SDO, NVM
-
-
40
ns
ECLK to BZO
-
-
40
ns
tR2
tr
Output Rise Time (All except Clock)
From 1.0V to 3.5V, CL = 50pF, Note 8
-
50
ns
tf
Output Fall Time (All except Clock)
From 3.5V to 1.0V, CL = 50pF, Note 8
-
50
ns
tr
Clock Output Rise Time
From 1.0V to 3.5V, CL = 20pF, Note 8
-
11
ns
tf
Clock Output Fall Time
From 3.5V to 1.0V, CL = 20pF, Note 8
-
11
ns
tCE3
ECLK to BZO, BOO
Notes 8, 9
0.5
1.0
DBP
tCE4
CTS Low to BZO, BOO Enabled
Notes 8, 9
0.5
1.5
DBP
tCE5
CTS Low to ECLK Enabled
Notes 8, 9
10.5
11.5
DBP
tCE6
CTS High to ECLK Disabled
Notes 8, 9
-
1.0
DBP
tCE7
CTS High to BZO, BOO Disabled
Notes 8, 9
1.5
2.5
DBP
tCD1
UDI to SDO, NVM
Notes 8, 9
2.5
3.0
DBP
tCD3
RST Low to CDLK, SDO, NVM Low
Notes 8, 9
0.5
1.5
DBP
tCD4
RST High to DCLK, Enabled
Notes 8, 9
0.5
1.5
DBP
tR1
UDI to BZO, BOO
Notes 8, 9
0.5
1.0
DBP
tR3
UDI to SDO, NVM
Notes 8, 9
2.5
3.0
DBP
NOTES:
7. AC testing as follows: f = 4.0MHz, VIH = 70% VCC, VIL = 20% VCC, Speed Select = 16X, VOH  VCC/2, VOL VCC/2, VCC = 4.5V and 5.5V.
Input rise and fall times driven at 1ns/V, Output load = 50pF.
8. Limits established by characterization and are not production tested.
9. DBP-Data Bit Period, Clock Rate = 16X, one DBP = 16 Clock Cycles; Clock Rate = 32X, one DBP = 32 Clock Cycles.
9
FN2951.4
October 1, 2015
HD-6409
Timing Waveforms
NOTE: UDI = 0, FOR NEXT DIAGRAMS
BIT PERIOD
BOI
BIT PERIOD
BIT PERIOD
T1
t2
t3
t3
t1
BZI
t2
COMMAND SYNC
t1
BOI
t2
t3
t3
t1
BZI
DATA SYNC
t2
t1
t1
BOI
t3
BZI
t3
t3
t3
t3
t1
t4
t5
t5
ONE
t4
ZERO
ONE
NOTE: BOI = 0, BZI = 1 FOR NEXT DIAGRAMS
t2
UDI
t2
COMMAND SYNC
t2
UDI
t2
DATA SYNC
t4
UDI
t5
ONE
t5
t4
ZERO
t4
ONE
ONE
FIGURE 8.
tC
tCL
tr
10%
tf
tr
90%
tCH
1.0V
3.5V
tf
FIGURE 9. CLOCK TIMING
10
FIGURE 10. OUTPUT WAVEFORM
FN2951.4
October 1, 2015
HD-6409
Timing Waveforms
(Continued)
ECLK
tCE2
tCE1
SD/CDS
tCE3
BZO
BOO
FIGURE 11. ENCODER TIMING
CTS
CTS
BZO
BOO
tCE6
ECLK
tCE7
tCE4
BZO
tCE5
BOO
ECLK
FIGURE 12. ENCODER TIMING
FIGURE 13. ENCODER TIMING
DCLK
tCD5
UDI
MANCHESTER MANCHESTER MANCHESTER MANCHESTER
LOGIC-1
LOGIC-0
LOGIC-0
LOGIC-1
tCD1
tCD2
SDO
tCD2
NRZ
LOGIC-1
NVM
NOTE: Manchester Data-In is not synchronous with Decoder Clock.
Decoder Clock is synchronous with decoded NRZ out of SDO.
FIGURE 14. DECODER TIMING
50%
RST
RST
tCD3
DCLK, SDO,
NVM
tCD4
50%
FIGURE 15. DECODER TIMING
11
50%
DCLK
FIGURE 16. DECODER TIMING
FN2951.4
October 1, 2015
HD-6409
Timing Waveforms
(Continued)
UDI
MANCHESTER ‘1’
MANCHESTER ‘0’
MANCHESTER ‘0’
MANCHESTER ‘1’
ECLK
tR2
tR1
BZO
tR2
MANCHESTER ‘1’
MANCHESTER ‘0’
MANCHESTER ‘0’
tR3
SDO
tR3
NVM
FIGURE 17. REPEATER TIMING
Test Load Circuit
DUT
CL
(NOTE)
NOTE: INCLUDES STRAY AND JIG
CAPACITANCE
FIGURE 18. TEST LOAD CIRCUIT
12
FN2951.4
October 1, 2015
HD-6409
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to the web to make
sure that you have the latest revision.
DATE
REVISION
October 1, 2015
FN2951.4
CHANGE
Added Rev History beginning with Rev 4.
Added About Intersil Verbiage.
Updated Ordering Information on page 1
Updated POD M20.3 to most current version. Revision changes are as follows:
Top View:
Corrected "7.50 BSC" to "7.60/7.40" (no change from rev 2; error was introduced in conversion)
Changed "10.30 BSC" to "10.65/10.00" (no change from rev 2; error was introduced in conversion)
Side View:
Changed "12.80 BSC" to "13.00/12.60" (no change from rev 2; error was introduced in conversion)
Changed "2.65 max" to "2.65/2.35" (no change from rev 2; error was introduced in conversion)
Changed Note 1 from "ANSI Y14.5M-1982." to "ASME Y14.5M-1994"
Updated to new POD format by moving dimensions from table onto drawing and adding land pattern
About Intersil
Intersil Corporation is a leading provider of innovative power management and precision analog solutions. The company's products
address some of the largest markets within the industrial and infrastructure, mobile computing and high-end consumer markets.
For the most updated datasheet, application notes, related documentation and related parts, please see the respective product
information page found at www.intersil.com.
You may report errors or suggestions for improving this datasheet by visiting www.intersil.com/ask.
Reliability reports are also available from our website at www.intersil.com/support
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9001 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
13
FN2951.4
October 1, 2015
HD-6409
Dual-In-Line Plastic Packages (PDIP)
E20.3 (JEDEC MS-001-AD ISSUE D)
20 LEAD DUAL-IN-LINE PLASTIC PACKAGE
N
E1
INDEX
AREA
1 2 3
INCHES
N/2
SYMBOL
-B-
-AD
E
BASE
PLANE
-C-
SEATING
PLANE
A2
A
L
D1
e
B1
D1
eA
A1
eC
B
0.010 (0.25) M
C
L
C A B S
C
eB
NOTES:
1. Controlling Dimensions: INCH. In case of conflict between English
and Metric dimensions, the inch dimensions control.
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Symbols are defined in the “MO Series Symbol List” in Section 2.2
of Publication No. 95.
4. Dimensions A, A1 and L are measured with the package seated in
JEDEC seating plane gauge GS-3.
MILLIMETERS
MIN
MAX
MIN
MAX
NOTES
A
-
0.210
-
5.33
4
A1
0.015
-
0.39
-
4
A2
0.115
0.195
2.93
4.95
-
B
0.014
0.022
0.356
0.558
-
B1
0.045
0.070
1.55
1.77
8
C
0.008
0.014
0.204
0.355
-
D
0.980
1.060
24.89
26.9
5
D1
0.005
-
0.13
-
5
E
0.300
0.325
7.62
8.25
6
E1
0.240
0.280
6.10
7.11
5
e
0.100 BSC
2.54 BSC
-
eA
0.300 BSC
7.62 BSC
6
eB
-
0.430
-
10.92
7
L
0.115
0.150
2.93
3.81
4
N
20
20
9
Rev. 0 12/93
5. D, D1, and E1 dimensions do not include mold flash or protrusions.
Mold flash or protrusions shall not exceed 0.010 inch (0.25mm).
6. E and eA are measured with the leads constrained to be perpendicular to datum -C- .
7. eB and eC are measured at the lead tips with the leads unconstrained. eC must be zero or greater.
8. B1 maximum dimensions do not include dambar protrusions. Dambar protrusions shall not exceed 0.010 inch (0.25mm).
9. N is the maximum number of terminal positions.
10. Corner leads (1, N, N/2 and N/2 + 1) for E8.3, E16.3, E18.3, E28.3,
E42.6 will have a B1 dimension of 0.030 - 0.045 inch (0.76 - 1.14mm).
14
FN2951.4
October 1, 2015
HD-6409
Package Outline Drawing
M20.3
20 LEAD WIDE BODY SMALL OUTLINE PLASTIC PACKAGE (SOIC)
Rev 3, 2/11
20
INDEX
AREA
7.60
7.40
1
2
10.65
10.00
0.25 (0.10) M B M
3
3
TOP VIEW
13.00
12.60
SEATING PLANE
2
2.65
2.35
5
0.75
1.27
BSC
0.49
0.35
7
0.25 (0.10) M
0.25
0.30
MAX
C A M B S
1.27
0.40
x 45°
8°
MAX
0.10 (0.004)
SIDE VIEW
DETAIL "X"
0.32
0.23
NOTES:
1. Dimensioning and tolerancing per ASME Y14.5M-1994.
(0.60)
1.27 BSC
2. Dimension does not include mold flash, protrusions or gate
burrs. Mold flash, protrusion and gate burrs shall not exceed
0.15mm (0.006 inch) per side.
20
(2.00)
3. Dimension does not include interlead lash or protrusions. Interlead
flash and protrusions shall not exceed 0.25mm (0.010 inch) per side.
4. The chamfer on the body is optional. If it is not present, a visual
index feature must be located within the crosshatched area.
(9.40mm)
5. Dimension is the length of terminal for soldering to a substrate.
6. Terminal numbers are shown for reference only.
7. The lead width as measured 0.36mm (0.14 inch) or greater above
the seating plane, shall not exceed a maximum value of 0.61mm
(0.024 inch)
8. Controlling dimension: MILLIMETER.
1
2
3
9. Dimensions in ( ) for reference only.
TYPICAL RECOMMENDED LAND PATTERN
15
10. JEDEC reference drawing number: MS-013-AC.
FN2951.4
October 1, 2015
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