Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modi鏗乪d to remove devices not offered.
CY74FCT2374T
CY74FCT2574T
SCCS040 - September 1994 - Revised March 2000
8-Bit Registers
Functional Description
The FCT2374T and FCT2574T are high-speed low-power
octal D-type 鏗俰p-鏗俹ps featuring separate D-type inputs for each
鏗俰p-鏗俹p. On-chip termination resistors have been added to the
outputs to reduce system noise caused by re鏗俥ctions. 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 鏗俰p-鏗俹ps. 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 鏗俰p-鏗俹ps 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 鏗俰p-鏗俹ps 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 鏗俰p-鏗俹ps.
The outputs are designed with a power-off disable feature to
allow for live insertion of boards.
Features
鈥?Function and pinout compatible with FCT and F logic
鈥?25鈩?output series resistors to reduce transmission line
re鏗俥ction noise
鈥?FCT-C speed at 5.2 ns max.
鈥?Reduced V
OH
(typically=3.3V) versions of equivalent
FCT functions
鈥?Edge-rate control circuitry for signi鏗乧antly improved
noise characteristics
鈥?Power-off disable feature
鈥?Matched rise and fall times
鈥?Fully compatible with TTL input and output logic levels
鈥?ESD > 2000V
鈥?Sink current
12 mA
Source current
15 mA
鈥?Edge-triggered D-type inputs
鈥?250 MHz typical toggle rate
鈥?Extended commercial temp. range of 鈥?0藲C to +85藲C
Logic Block Diagram
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
Logic Symbol
D
0
CP
OE
O
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
O
1
O
2
O
3
O
4
O
5
O
6
O
7
OE
FCT2374T-5
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
FCT2374T-6
Pin Configurations
SOIC/QSOP
Top View
OE
O
0
D
0
D
1
O
1
O
2
D
2
D
3
O
3
GND
1
2
3
4
5
6
7
8
9
10
FCT2374T
20
19
18
17
16
15
14
13
12
11
V
CC
O
7
D
7
D
6
O
6
O
5
D
5
D
4
O
4
CP
FCT2374T-2
OE
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
GND
SOIC/QSOP
Top View
1
2
3
4
5
6
7
8
9
10
FCT2574
20
19
18
17
16
15
14
13
12
11
V
CC
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
CP
FCT2374T-4
Copyright
漏
2000, Texas Instruments Incorporated
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