IDT IDT74FCT621ATSO Fast cmos octal bus transceiver (open drain) Datasheet

IDT54/74FCT621T/AT
FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT54/74FCT621T/AT
FAST CMOS
OCTAL BUS TRANSCEIVER
(OPEN DRAIN)
Integrated Device Technology, Inc.
FEATURES:
DESCRIPTION:
•
•
•
•
The IDT54/74FCT621T/AT is an octal transceiver with
non-inverting Open-Drain bus compatible outputs in both
send and receive directions. The B bus outputs are capable
of sinking 64mA providing very good capacitive drive
characteristics. These octal bus transceivers are designed for
asynchronous two-way communication between data buses.
The control function implementation allows for maximum
flexibility in timing.
•
•
•
•
•
Std. and A speed grades
Low input and output leakage ≤1µA (max.)
CMOS power levels
True TTL input and output compatibility
– VOH = 3.3V (typ.)
– VOL = 0.3V (typ.)
Power off disable outputs permit “live insertion”
Meets or exceeds JEDEC standard 18 specifications
Product available in Radiation Tolerant and Radiation
Enhanced versions
Military product compliant to MIL-STD-883, Class B
and DESC listed (dual marked)
Available in DIP, SOIC, CERPACK and LCC packages
FUNCTIONAL BLOCK DIAGRAM (1)
PIN CONFIGURATIONS
GAB
A1
A2
A3
A4
A5
A6
A7
A8
GND
GBA
GAB
B1
A1
1
20
2
19
3
18
P20-1,
D20-1,
SO20-2
&
E20-1
4
5
6
7
17
16
15
14
8
13
9
12
10
11
Vcc
GBA
B1
B2
B3
B4
B5
B6
B7
B8
2538 drw 02
A2
A1
GAB
Vcc
GBA
DIP/SOIC/CERPACK
TOP VIEW
INDEX
3
A3
A4
A5
A6
A7
B 2 –B 8
A 2 –A 8
2538 drw 01
2
1
20 19
18
5
6
17
L20-2
16
7
15
8
14
9 10 11 12 13
A8
GND
B8
B7
B6
7 Other Transceivers
4
B1
B2
B3
B4
B5
2538 drw 03
LCC
TOP VIEW
The IDT logo is a registered trademark of Integreted Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
1995 Integrated Device Technology, Inc.
6.18
6.18
APRIL 1994
DSC-4222/4
1
1
IDT54/74FCT621T/AT
FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
FUNCTION TABLE(1)
PIN DESCRIPTION
Pin Names
GBA, GAB
Description
GBA
Enable Inputs
A1 – A 8
A Inputs or Open-drain Outputs
B1 – B 8
B Inputs or Open-drain Outputs
L
H
H
L
2538 tbl 01
Enable Inputs
GAB
L
H
L
H
Function
B data to A bus
A data to B bus
OFF
B data to A bus
A data to B bus
NOTE:
2538 tbl 02
1. H = HIGH Voltage Level.
L = LOW Voltage Level.
OFF = HIGH if pull-up resistor is connected to Open-Drain output.
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Rating
Commercial
(2)
VTERM
Terminal Voltage
–0.5 to +7.0
with Respect to
GND
VTERM(3) Terminal Voltage
–0.5 to
with Respect to
VCC +0.5
GND
TA
Operating
0 to +70
Temperature
TBIAS
Temperature
–55 to +125
Under Bias
TSTG
Storage
–55 to +125
Temperature
PT
Power Dissipation
0.5
I OUT
DC Output
Current
–60 to +120
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Military
–0.5 to +7.0
Unit
V
–0.5 to
VCC +0.5
V
–55 to +125
°C
–65 to +135
°C
–65 to +150
°C
0.5
W
–60 to +120
mA
Symbol
Parameter(1)
CIN
Input
Capacitance
COUT
Output
Capacitance
Conditions
VIN = 0V
Typ.
6
VOUT = 0V
8
Max. Unit
10
pF
12
pF
2538 lnk 04
NOTE:
1. This parameter is measured at characterization but not tested.
2538 lnk 03
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions
above those indicated in the operational sections of this specification is
not implied. Exposure to absolute maximum rating conditions for
extended periods may affect reliability. No terminal voltage may exceed
VCC by +0.5V unless otherwise noted.
2. Input and VCC terminals only.
3. Outputs and I/O terminals only.
6.18
2
IDT54/74FCT621T/AT
FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following conditions Apply Unless Otherwise Specified:
Commercial: TA = 0°C to +70°C, VCC = 5.0V ± 5%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10%
Symbol
Test Conditions(1)
Parameter
Min.
Typ.(2)
Max.
Unit
2.0
—
—
V
VIH
Input HIGH Level
VIL
Input LOW Level
Guaranteed Logic LOW Level
—
—
0.8
V
IIH
Input HIGH Current(5)
VCC = Max., VI = 2.7V
—
—
±1
µA
IIL
Input LOW Current(5)
VCC = Max., VI = 0.5V
—
—
±1
µA
VCC = Max., VI = VCC (Max.)
—
—
±1
µA
VCC = Min., IN= –18mA
—
–0.7
–1.2
V
VOH = Vcc (Max.)
—
—
20
µA
IOL = 48mA MIL.(4)
—
0.3
0.55
V
—
0.3
0.5
V
—
—
±1
µA
—
200
—
mV
—
0.01
1
mA
Guaranteed Logic HIGH Level
(5)
II
Input HIGH Current
VIK
Clamp Diode Voltage
IOH
Output HIGH Current
VCC = Max.
VIN = VIH or VIL
VOL
Output LOW Voltage
(B Bus)
VIN = VIH or VIL
IOL = 64mA COM’L.
VOL
Output LOW Voltage
VCC = Min.
IOL = 32mA MIL.(4)
(A Bus)
VIN = VIH or VIL
IOL = 48mA COM’L.
Input/Output Power Off
VCC = 0V, VIN or VO ≤ 4.5V
IOFF
VCC = Min.
Leakage(5)
VH
Input Hysteresis
ICC
Quiescent Power Supply
—
VCC = max., VIN = GND or Vcc
Current
NOTES:
2538 tbl 05
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, +25°C ambient.
3. These are maximum IOL values per output, for 8 outputs turned on simultaneously. Total maximum IOL (all outputs) is 512mA for commercial and
384mA for military. Derate IOL for number of outputs exceeding 8 turned on simultaneously.
4. The test limit for this parameter is ±5µA at TA = –55°C.
5. This parameter is guaranteed but not tested.
6.18
3
IDT54/74FCT621T/AT
FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol
Test Conditions(1)
Parameter
Min.
Typ.(2)
Max.
Unit
—
0.5
2.0
mA
∆ICC
Quiescent Power Supply Current
TTL Inputs HIGH
VCC = Max.
VIN = 3.4V(3)
ICCD
Dynamic Power Supply Current(4)
Vcc = Max.
Outputs Open
GBA = GAB = GND or VCC
One Input Toggling
50% Duty Cycle
VIN = VCC
VIN = GND
—
0.15
0.25
mA/MHz
IC
Total Power Supply Current(6,7)
Vcc = Max.
Outputs Open
GBA = GAB = GND or VCC
One Bit Toggling
at fi =10MHz
50% Duty Cycle
VIN = VCC
VIN = GND
—
1.5
3.5
mA
VIN = 3.4V
VIN = GND
—
1.8
4.5
Vcc = Max.
Outputs Open
GBA = GAB = GND or VCC
Eight Bits Toggling
at fi = 2.5MHz
50% Duty Cycle
VIN = VCC
VIN = GND
—
3.0
6.0(5)
VIN = 3.4V
VIN = GND
—
5.0
14.0(5)
NOTES:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V); all other inputs at VCC or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fiNi)
ICC = Quiescent Current
∆ICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current Caused by an Output Transition Pair (HLH or LHL)
fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
fi = Input Frequency
Ni = Number of Inputs at fi
All currents are in milliamps and all frequencies are in megahertz.
7. This test is performed with outputs tied to GND through a pull-down resistor.
2538 tbl 06
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
IDT54/74FCT621T
Com’l.
Symbol
tPLH
Parameter
Propagation Delay A to B
tPHL
tPLH
tPHL
tPLH
(1)
Condition
Max. Min.
(2)
Com’l.
Max. Min.
(2)
Mil.
Max. Min.
(2)
Max. Unit
CL = 50pF
5.5
13.0
5.5
13.5
5.5
12.0
5.5
12.5
RL = 500Ω
1.5
8.5
1.5
9.5
1.5
6.8
1.5
7.6
5.5
12.5
5.5
13.0
5.5
12.0
5.5
12.5
1.5
8.0
1.5
9.0
1.5
6.4
1.5
7.2
5.5
14.0
5.5
14.5
5.5
13.0
5.5
13.5
Propagation Delay B to A
Propagation Delay GBA to A
tPHL
tPLH
Min.
(2)
IDT54/74FCT621AT
Mil.
Propagation Delay GAB to B
tPHL
1.5
8.5
1.5
9.5
1.5
6.8
1.5
7.6
5.5
14.0
5.5
14.5
5.5
13.0
5.5
13.5
1.5
8.0
1.5
9.0
1.5
6.4
1.5
7.2
ns
ns
ns
ns
2538 tbl 07
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
6.18
4
IDT54/74FCT621T/AT
FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS
SWITCH POSITION
V CC
7.0V
500Ω
Switch
Open Drain
Disable Low
Closed
Enable Low
V OUT
VIN
Pulse
Generator
Test
Open
All Other Tests
D.U.T.
50pF
RT
2538 lnk 08
DEFINITIONS:
CL= Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
Generator.
500Ω
CL
2538 drw 03
SET-UP, HOLD AND RELEASE TIMES
DATA
INPUT
tH
tSU
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
ETC.
tREM
tSU
PULSE WIDTH
3V
1.5V
0V
3V
1.5V
0V
LOW-HIGH-LOW
PULSE
1.5V
tW
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
1.5V
3V
1.5V
0V
tH
2538 drw 05
2538 drw 04
PROPAGATION DELAY
ENABLE AND DISABLE TIMES
ENABLE
SAME PHASE
INPUT TRANSITION
tPLH
tPHL
OUTPUT
tPLH
OPPOSITE PHASE
INPUT TRANSITION
tPHL
3V
1.5V
0V
DISABLE
3V
CONTROL
INPUT
tPLZ
tPZL
VOH
1.5V
VOL
OUTPUT
NORMALLY
LOW
3V
1.5V
0V
SWITCH
CLOSED
3.5V
1.5V
tPZH
OUTPUT
NORMALLY
HIGH
2538 drw 06
SWITCH
OPEN
1.5V
0V
3.5V
0.3V
VOL
tPHZ
0.3V
1.5V
0V
VOH
0V
2538 drw 07
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control DisableHIGH
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns
6.18
5
IDT54/74FCT621T/AT
FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION
IDT
XX
FCT
Temperature Range
X
Family
X
X
DeviceType Package
X
Process
Blank
B
Commercial
MIL-STD-883, Class B
P
D
SO
L
E
Plastic DIP
CERDIP
Small Outline IC
Leadless Chip Carrier
CERPACK
621T
621AT
Octal Bus Transceiver
Blank
High Drive
54
74
–55°C to +125°C
0°C to +70°C
2538 drw 08
6.18
6
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