Datasheet IDT54FCT373T, IDT54FCT373AT, IDT54FCT373CT, IDT54FCT373DT, IDT74FCT373T Datasheet (Integrated Device Technology)
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IDT54/74FCT623T/AT/CT
FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
FAST CMOS OCTAL
BUS TRANSCEIVERS
(3-STATE)
Integrated Device Technology, Inc.
IDT54/74FCT623T/AT/CT
FEATURES:
• Std., A and C 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.)
• High drive outputs (-15mA IOH, 64mA IOL)
• 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
DESCRIPTION
The FCT623T/AT/CT is a non-inverting octal transceiver
with 3-state bus-driving outputs in both the send and receive
directions. The B bus outputs are capable of sinking 64mA and
sourcing up to 15mA, 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.
One important feature of the FCT623T/AT/CT is the Power
Down Disable capability. When the GAB and GBA inputs are
conditioned to put the device in high-Z state, the I/O ports will
maintain high impedance during power supply ramps and
when V
applications where it may be necessary to perform “live”
insertion and removal of cards for on-line maintenance. It is
also a benefit in systems with multiple redundancy where one
or more redundant cards may be powered-off.
CC = 0V. This is a desirable feature in back-plane
GBA
GAB
A1
A2 - A8
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
B1
B2 - B8
7 other transceivers
2563 drw 01
MILITARY AND COMMERCIAL TEMPERATURE RANGES NOVEMBER 1995
1996 Integrated Device Technology, Inc. 6.19 DSC-2563/5
6.19 1
1
IDT54/74FCT623T/AT/CT
FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
PIN CONFIGURATIONS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
GAB
A
A2
A3
A4
A5
A6
A7
A8
GND
1
2
3
4
P20-1
D20-1
5
SO20-2
6
&
7
E20-1
8
9
10 11
DIP/SOIC/CERPACK
20
19
18
17
16
15
14
13
12
VCC1
GBA
B
1
B2
B3
B4
B5
B6
B7
B8
2563 drw 02
TOP VIEW
DEFINITION OF FUNCTIONAL TERMS
Pin Names Description
G
BA, GAB Enable Inputs
A1 - A8 A Bus Inputs or 3-State Outputs
B1 - B8 B Bus Inputs or 3-State Outputs
2563 tbl 01
FUNCTION TABLE
Enable Inputs
GGBA GAB
L L B data to A bus
H H A data to B bus
HL Z
L H B data to A bus
NOTES: 2563 tbl 02
1. H = HIGH Voltage Level
2. L = LOW Volage Level
3. Z = High-Impedance (OFF) state
(1)
Outputs
A data to B bus
INDEX
A3
A4
A5
A6
A7
A2
3 2 20 19
4
5
6
7
8
A1
1
L20-2
GAB
CC
V
GBA
18
17
16
15
14
B1
B2
B3
B4
B5
9 10111213
8
8
GND
B7
B
B6
2563 drw 03
A
LCC
TOP VIEW
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol Rating Commercial Military Unit
(2)
VTERM
Terminal Voltage
–0.5 to +7.0 –0.5 to +7.0 V
with Respect to
GND
(3)
VTERM
TA Operating
Terminal Voltage
with Respect to
GND
–0.5 to
V
CC +0.5
–0.5 to
VCC +0.5
0 to +70 –55 to +125 °C
V
Temperature
TBIAS Temperature
–55 to +125 –65 to +135 °C
Under Bias
TSTG Storage
–55 to +125 –65 to +150 °C
Temperature
PT Power Dissipation 0.5 0.5 W
IOUT DC Output
–60 to +120 –60 to +120 mA
Current
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
V
CC by +0.5V unless otherwise noted.
2. Input and V
3. Outputs and I/O terminals only.
CC terminals only.
2563 lnk 03
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Symbol Parameter
CIN Input
Capacitance
COUT Output
Capacitance
NOTE:
1. This parameter is measured at characterization but not tested.
6.19 2
(1)
Conditions Typ. Max. Unit
VIN = 0V 6 10 pF
VOUT = 0V 8 12 pF
2563 lnk 04
IDT54/74FCT623T/AT/CT
FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
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 Parameter Test Conditions
(1)
Min. Typ.
VIH Input HIGH Level Guaranteed Logic HIGH Level 2.0 — — V
VIL Input LOW Level Guaranteed Logic LOW Level — — 0.8 V
(5)
(5)
(5)
VCC = Max., VI = 2.7V — — ±1 µA
VCC = Max., VI = 0.5V — — ±1 µA
VCC = Max., VI = VCC (Max.) — — ±1 µA
II H Input HIGH Current
II L Input LOW Current
II Input HIGH Current
VIK Clamp Diode Voltage VCC = Min., IN = –18mA — –0.7 –1.2 V
IOS Short Circuit Current VCC = Max.
VOH Output HIGH Voltage
(A and B Bus)
VCC = Min.
V
IN = VIH or VIL
VOL Output LOW Voltage (A Bus) VCC = Min.
V
IN = VIH or VIL
VOL Output LOW Voltage (B Bus) VCC = Min.
V
IN = VIH or VIL
IOFF Input/Output Power Off Leakage
(6)
VCC = 0V, VIN or VO ≤ 4.5V — — ±1 µA
(3)
, VO = GND –60 –120 –225 mA
IOH = –6mA MIL.
I
OH = –8mA COM'L.
IOH = –12mA MIL.
I
OH = –15mA COM'L.
IOL = 32mA MIL.
(4)
2.4 3.3 — V
2.0 3.0 — V
— 0.3 0.5 V
IOL = 48mA COM'L.
IOL = 48mA MIL.
(4)
— 0.3 0.55 V
IOL = 64mA COM'L.
VH Input Hysteresis — — 200 — mV
ICC Quiescent Power Supply Current VCC = Max., VIN = GND or VCC — 0.01 1 µA
NOTES: 2563 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 V
3. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second.
4. These are maximum I
for military. Derate I
5. The test limit for this parameter is ±5µA at T
6. This parameter is guaranteed but not tested.
CC = 5.0V, +25°C ambient.
OL values per output, for 8 outputs turned on simultaneously. Total maximum IOL (all outputs) is 512mA for commercial and 384mA
OL for number of outputs exceeding 8 turned on simultaneously.
A = –55°C.
(2)
Max. Unit
6.19 3
IDT54/74FCT623T/AT/CT
FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol Parameter Test Conditions
∆ICC
ICCD Dynamic Power Supply
Quiescent Power Supply Current
TTL Inputs HIGH
(4)
Current
VCC = Max.
IN = 3.4V
V
(3)
VCC = Max.
Outputs Open
G
BA = GAB = GND
(1)
IN = VCC
V
IN = GND
V
Min. Typ.
— 0.5 2.0 mA
— 0.15 0.25 mA/
One Input Toggling
50% Duty Cycle
IC Total Power Supply Current
(6)
VCC = Max.
Outputs Open
VIN = VCC
IN = GND
V
— 1.5 3.5 mA
fi = 10MHz
50% Duty Cycle
G
BA = GAB = GND
IN = 3.4V
V
IN = GND
V
— 1.8 4.5
One Bit Toggling
VCC = Max.
Outputs Open
IN = VCC
V
IN = GND
V
— 3.0 6.0
fi = 2.5MHz
50% Duty Cycle
G
BA = GAB = GND
IN = 3.4V
V
IN = GND
V
— 5.0 14.0
Eight Bits Toggling
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 V
3. Per TTL driven input (V
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 I
6. I
C = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fiNi)
CC = Quiescent Current
I
CC = Power Supply Current for a TTL High Input (VIN = 3.4V)
∆I
D
H = Duty Cycle for TTL Inputs High
T = Number of TTL Inputs at DH
N
ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
CP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
f
f
i = Input Frequency
i = Number of Inputs at fi
N
All currents are in milliamps and all frequencies are in megahertz.
CC = 5.0V, +25°C ambient.
IN = 3.4V). All other inputs at VCC or GND.
CC formula. These limits are guaranteed but not tested.
(2)
Max. Unit
MHz
(5)
(5)
2563 tbl 07
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
54/74FCT623T 54/74FCT623AT 54/74FCT623CT
Com'l. Mil. Com'l. Mil. Com'l. Mil.
Symbol Parameter Condition
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
NOTES: 2563 tbl 07
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays
Propagation Delay
An to Bn
Propagation Delay
Bn to An
Output Enable Time
G
BA to An
Output Disable Time
G
BA to An
Output Enable Time
GAB to Bn
Output Disable Time
GAB to Bn
CL = 50pF
R
(1)
L = 500Ω
(2)
Min.
Max. Min.
1.5 7.5 1.5 9.0 1.5 5.5 1.5 6.3 1.5 4.8 1.5 5.4 ns
1.5 7.5 1.5 9.5 1.5 5.5 1.5 6.3 1.5 4.8 1.5 5.4 ns
1.5 9.0 1.5 10.0 1.5 7.0 1.5 8.0 1.5 6.1 1.5 6.9 ns
1.5 8.0 1.5 9.0 1.5 6.5 1.5 7.4 1.5 5.6 1.5 6.4 ns
1.5 9.0 1.5 10.5 1.5 7.0 1.5 8.0 1.5 6.1 1.5 6.9 ns
1.5 8.0 1.5 9.0 1.5 6.5 1.5 7.4 1.5 5.6 1.5 6.4 ns
6.19 4
(2)
Max. Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max.
Unit
IDT54/74FCT623T/AT/CT
FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS
SWITCH POSITION
Test Switch
V
CC
7.0V
Open Drain
Disable Low
Pulse
Generator
500Ω
V
V
IN
D.U.T.
T
R
OUT
50pF
CL
500Ω
2563 drw 05
DEFINITIONS:
L= Load capacitance: includes jig and probe capacitance.
C
T = Termination resistance: should be equal to ZOUT of the Pulse
R
Enable Low
All Other Tests
Generator.
SET-UP, HOLD AND RELEASE TIMES PULSE WIDTH
DATA
INPUT
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
ETC.
tSU
tSU
tH
tREM
tH
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
2563 drw 06
LOW-HIGH-LOW
PULSE
HIGH-LOW-HIGH
PULSE
Closed
Open
2563 lnk 09
1.5V
tW
1.5V
2563 drw 07
SAME PHASE
INPUT TRANSITION
OUTPUT
OPPOSITE PHASE
INPUT TRANSITION
tPLH
tPHL
tPLH tPHL
3V
1.5V
0V
OH
V
1.5V
VOL
3V
1.5V
0V
2563 drw 08
ENABLE AND DISABLE TIMESPROPAGATION DELAY
ENABLE DISABLE
3V
CONTROL
INPUT
t
PLZtPZL
OUTPUT
NORMALLY
LOW
SWITCH
CLOSED
3.5V
1.5V
tPZH tPHZ
OUTPUT
NORMALLY
HIGH
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control DisableHIGH
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; t
SWITCH
OPEN
1.5V
0V
F ≤ 2.5ns; tR ≤ 2.5ns
0.3V
0.3V
1.5V
0V
3.5V
VOL
VOH
0V
2563 drw 09
6.19 5
IDT54/74FCT623T/AT/CT
FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
ORDERING INFORMATION
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT XX
Temp. Range
FCT
X
Family
XXXX
Device TypeXPackage
X
Process
Blank
B
P
D
SO
L
E
623T
623AT
Commercial
MIL-STD-883, Class B
Plastic DIP
CERDIP
Small Outline IC
Leadless Chip Carrier
CERPACK
Octal Bus Transceiver (Inverting)
Octal Bus Transceiver (Non-Inverting)
623CT
Blank High Drive
°
54
74
C to +125°C
–55
°
C to +70°C
0
6.19 6
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