The FCT16374T/AT/CT/ET and FCT162374T/AT/CT/ET
16-bit edge-triggered D-type registers are built using advanced dual metal CMOS technology. These high-speed,
low-power registers are ideal for use as buffer registers for
data synchronization and storage. The Output Enable (xOE)
and clock (xCLK) controls are organized to operate each
device as two 8-bit registers or one 16-bit register with
common clock. Flow-through organization of signal pins simplifies layout. All inputs are designed with hysteresis for
improved noise margin.
The FCT16374T/AT/CT/ET are ideally suited for driving
high-capacitance loads and low-impedance backplanes. The
output buffers are designed with power off disable capability
to allow "live insertion" of boards when used as backplane
drivers.
The FCT162374T/AT/CT/ET have balanced output drive
with current limiting resistors. This offers low ground bounce,
minimal undershoot, and controlled output fall times– reducing the need for external series terminating resistors. The
FCT162374T/AT/CT/ET are plug-in replacements for the
FCT16374T/AT/CT/ET and ABT16374 for on-board bus interface applications.
FUNCTIONAL BLOCK DIAGRAM
OE
1O1
2
2
CLK
2D1
TO 7 OTHER CHANNELS
1
D
2O1
C
2542 drw 01
OE
1
1
CLK
1D1
TO 7 OTHER CHANNELS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
D
C
2542 drw 01
MILITARY AND COMMERCIAL TEMPERATURE RANGESAUGUST 1996
IDT54/74FCT16374T/AT/CT/ET, 162374T/AT/CT/ET
FAST CMOS 16-BIT REGISTER (3-STATE)MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN DESCRIPTION
Pin NamesDescription
xDxData Inputs
xCLKClock Inputs
xOx3-State Outputs.
x
OE
ABSOLUTE MAXIMUM RATINGS
SymbolDescriptionMax.Unit
(2)
V
TERM
(3)
V
TERM
T
STG
I
OUT
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.
2. All device terminals except FCT162XXXT Output and I/O terminals.
3. Output and I/O terminals for FCT162XXXT.
3-State Output Enable Input (Active LOW)
2542 tbl 01
(1)
Terminal Voltage with Respect to
GND
Terminal Voltage with Respect to
GND
–0.5 to +7.0V
–0.5 to
V
CC
+0.5
V
Storage Temperature–65 to +150°C
DC Output Current–60 to +120 mA
2542 lnk 03
FUNCTION TABLE
(1)
InputsOutputs
FunctionxDxxCLKx
OE
OE
xOx
Hi-ZXLHZ
XHHZ
LoadL↑LL
RegisterH↑LH
L↑HZ
H↑HZ
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High Impedance
2542 tbl 02
↑ = LOW-to-HIGH Transition
CAPACITANCE (TA = +25°C, f = 1.0MHz)
SymbolParameter
CINInput
Capacitance
CI/OI/O
Capacitance
NOTE:
1. This parameter is measured at characterization but not tested.
(1)
ConditionsTyp.Max. Unit
VIN = 0V3.56.0pF
VOUT = 0V3.58.0pF
2542 lnk 04
5.83
IDT54/74FCT16374T/AT/CT/ET, 162374T/AT/CT/ET
FAST CMOS 16-BIT REGISTER (3-STATE)MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Commercial: TA = –40°C to +85°C, VCC = 5.0V ± 10%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10%
SymbolParameterTest Conditions
(1)
Min. Typ.
VIHInput HIGH LevelGuaranteed Logic HIGH Level2.0——V
VILInput LOW LevelGuaranteed Logic LOW Level——0.8V
II HInput HIGH Current (Input pins)