Integrated Device Technology, Inc.
FAST CMOS OCTAL D IDT54/74FCT374T/AT/CT/DT - 2374T/AT/CT
REGISTERS (3-STATE)
IDT54/74FCT534T/AT/CT
IDT54/74FCT574T/AT/CT/DT - 2574T/AT/CT
FEATURES:
• Common features:
– Low input and output leakage ≤1µA (max.)
– CMOS power levels
– True TTL input and output compatibility
– VOH = 3.3V (typ.)
– VOL = 0.3V (typ.)
– 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, SSOP, QSOP, CERPACK
and LCC packages
• Features for FCT374T/FCT534T/FCT574T:
– Std., A, C and D speed grades
– High drive outputs (-15mA IOH, 48mA IOL)
• Features for FCT2374T/FCT2574T:
– Std., A, and C speed grades
– Resistor outputs (-15mA IOH, 12mA IOL Com.)
(-12mA IOH, 12mA IOL Mil.)
– 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
D0 D1 D2 D3 D4 D5
CP
CP D
Q
CP D
Q
CP D
Q
CP D
Q
CP D
Q
CP D
Q
D6
CP D
Q
D7
CP D
Q
OE
Q0 Q1 Q2
FUNCTIONAL BLOCK DIAGRAM FCT534T
D0 D1 D2
CP
CP D
Q
CP D
Q
CP D
Q
Q3
D3
CP D
Q
Q4
D4
CP D
Q
Q5
D5
CP D
Q
Q6 Q7
2569 drw 01
D6 D7
CP D
Q
CP D
Q
OE
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
2569 drw 02
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1995 Integrated Device Technology, Inc.
6.13
AUGUST 1995
DSC-4214/5
1
