FAST CMOS OCTAL D
REGISTERS (3-STATE)
Integrated Device Technology, Inc.
IDT54/74FCT374T/AT/CT/DT - 2374T/AT/CT
IDT54/74FCT534T/AT/CT
IDT54/74FCT574T/AT/CT/DT - 2574T/AT/CT
FEATURES:
鈥?Common features:
鈥?Low input and output leakage
鈮?碌A
(max.)
鈥?CMOS power levels
鈥?True TTL input and output compatibility
鈥?V
OH
= 3.3V (typ.)
鈥?V
OL
= 0.3V (typ.)
鈥?Meets or exceeds JEDEC standard 18 specifications
鈥?Product available in Radiation Tolerant and Radiation
Enhanced versions
鈥?Military product compliant to MIL-STD-883, Class B
and DESC listed (dual marked)
鈥?Available in DIP, SOIC, SSOP, QSOP, CERPACK
and LCC packages
鈥?Features for FCT374T/FCT534T/FCT574T:
鈥?Std., A, C and D speed grades
鈥?High drive outputs (-15mA I
OH
, 48mA I
OL
)
鈥?Features for FCT2374T/FCT2574T:
鈥?Std., A, and C speed grades
鈥?Resistor outputs (-15mA I
OH
, 12mA I
OL
Com.)
(-12mA I
OH
, 12mA I
OL
Mil.)
鈥?Reduced system switching noise
DESCRIPTION
The FCT374T/FCT2374T, FCT534T and FCT574T/
FCT2574T are 8-bit registers built using an advanced dual
metal CMOS technology. These registers consist of eight D-
type flip-flops with a buffered common clock and buffered 3-
state output control. When the output enable (
OE
) input is
LOW, the eight outputs are enabled. When the
OE
input is
HIGH, the outputs are in the high-impedance state.
Input data meeting the set-up and hold time requirements
of the D inputs is transferred to the Q outputs on the LOW-to-
HIGH transition of the clock input.
The FCT2374T and FCT2574T 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. FCT2xxxT
parts are plug-in replacements for FCTxxxT parts.
FUNCTIONAL BLOCK DIAGRAM FCT374/FCT2374T AND FCT574/FCT2574T
D
0
CP
CP D
Q
CP D
Q
CP
D
Q
CP
D
Q
CP
D
Q
CP
D
Q
CP
D
Q
CP
D
Q
D
1
D
2
D
3
D
4
D
5
D
6
D
7
OE
Q
0
Q
1
Q
2
Q
3
Q
4
Q
5
Q
6
Q
7
2569 drw 01
FUNCTIONAL BLOCK DIAGRAM FCT534T
D
0
CP
CP
D
Q
CP
D
Q
CP
D
Q
CP
D
Q
CP
D
Q
CP
D
Q
CP
D
Q
CP
D
Q
D
1
D
2
D
3
D
4
D
5
D
6
D
7
OE
Q
0
Q
1
Q
2
Q
3
Q
4
Q
5
Q
6
Q
7
2569 drw 02
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
漏1995
Integrated Device Technology, Inc.
AUGUST 1995
DSC-4214/5
6.13
1
1
2
3
4
5
6
7
8
