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CY74FCT2374T Datasheet, PDF (1/6 Pages) Texas Instruments – 8-Bit Registers
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CY74FCT2374T
CY74FCT2574T
SCCS040 - September 1994 - Revised March 2000
Features
• Function and pinout compatible with FCT and F logic
• 25Ω output series resistors to reduce transmission line
reflection noise
• FCT-C speed at 5.2 ns max.
• Reduced VOH (typically=3.3V) versions of equivalent
FCT functions
• Edge-rate control circuitry for significantly improved
noise characteristics
• Power-off disable feature
• Matched rise and fall times
• Fully compatible with TTL input and output logic levels
• ESD > 2000V
• Sink current
Source current
12 mA
15 mA
• Edge-triggered D-type inputs
• 250 MHz typical toggle rate
• Extended commercial temp. range of –40˚C to +85˚C
8-Bit Registers
Functional Description
The FCT2374T and FCT2574T are high-speed low-power
octal D-type flip-flops featuring separate D-type inputs for each
flip-flop. On-chip termination resistors have been added to the
outputs to reduce system noise caused by reflections. The
FCT2374T and FCT2574T can be used to replace the
FCT374T and FCT574T to reduce noise in an existing design.
Both devices have three-state outputs for bus oriented appli-
cations. A buffered clock (CP) and output enable (OE) are
common to all flip-flops. The FCT2574T is identical to the
FCT2374T except that all the outputs are on one side of the
package and inputs on the other side. The flip-flops contained
in the FCT2374T and FCT2574T will store the state of their
individual D inputs that meet the set-up and hold time require-
ments on the LOW-to-HIGH clock (CP) transition. When OE is
LOW, the contents of the flip-flops are available at the outputs.
When OE is HIGH, the outputs will be in the high-impedence
state. The state of output enable does not affect the state of
the flip-flops.
The outputs are designed with a power-off disable feature to
allow for live insertion of boards.
Logic Block Diagram
D0
D1
D2
D3
D4
D5
D6
D7
CP
CP D CP D CP D CP D CP D CP D CP D CP D
Q
Q
Q
Q
Q
Q
Q
Q
OE
Logic Symbol
D0 D1 D2 D3 D4 D5 D6 D7
CP
OE
O0 O1 O2 O3 O4 O5 O6 O7
FCT2374T-5
O0
O1
O2
O3
O4
O5
O6
O7
FCT2374T-6
Pin Configurations
OE
O0
D0
D1
O1
O2
D2
D3
O3
GND
SOIC/QSOP
Top View
1
20
2
19
3
18
4
17
5 FCT2374T 16
6
15
7
14
8
13
9
12
10
11
VCC
O7
D7
D6
O6
O5
D5
D4
O4
CP
FCT2374T-2
SOIC/QSOP
Top View
OE
D0
D1
D2
D3
D4
D5
D6
D7
GND
1
20 VCC
2
19 O0
3
18 O1
4
17 O2
5 FCT2574 16
O3
6
15
O4
7
14 O5
8
13 O6
9
12 O7
10
11 CP
FCT2374T-4
Copyright © 2000, Texas Instruments Incorporated
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