1CY74FCT2573T
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modi鏗乪d to remove devices not offered.
CY74FCT2373T
CY74FCT2573T
SCCS039 - September 1994 - Revised March 2000
8-Bit Latches
Functional Description
The FCT2373T and FCT2573T are 8-bit, high-speed CMOS
TTL-compatible buffered latches with three-state outputs that
are ideal for driving high-capacitance loads, such as memory
and address buffers. On-chip 25鈩?termination resistors have
been added to the outputs to reduce system noise caused by
re鏗俥ctions. FCT2373T can be used to replace FCT373T, and
FCT2573T to replace FCT573T to reduce noise in an existing
design.
When latch enable (LE) is HIGH, the 鏗俰p-鏗俹ps appear trans-
parent to the data. Data that meets the required set-up times
are latched when LE transitions from HIGH to LOW. Data
appears on the bus when the output enable (OE) is LOW.
When output enable is HIGH, the bus output is in the high
impedance state. In this mode, data can still be entered into
the latches.
The outputs are designed with a power-off disable feature to
allow for live insertion of boards.
Features
鈥?Function and pinout compatible with the fastest bipolar
logic
鈥?25鈩?output series resistors to reduce transmission line
refelection noise
鈥?FCT-C speed at 4.7 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?ESD > 2000V
鈥?Fully compatible with TTL input and output logic levels
鈥?Sink current
12 mA
Source current
15 mA
鈥?/div>
Extended commercial temp. range of 鈥?0藲C to +85藲C
Logic Symbol
Pin Configurations
SOIC/QSOP
Top View
D
0
LE
OE
O
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
OE
O
0
D
0
1
2
3
4
5
20
19
18
17
V
CC
O
7
D
7
D
6
O
6
O
5
D
5
D
4
O
4
LE
FCT2373T-4
O
1
O
2
O
3
O
4
O
5
O
6
O
7
D
1
O
1
O
2
FCT2373T-1
D
2
D
3
O
3
GND
16
6 FCT2373T15
14
7
8
9
10
13
12
11
Logic Block Diagram
D
0
LE
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
D
0
D
1
D
2
D
3
D
4
OE
D
5
D
6
D
7
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
FCT2373T-2
GND
SOIC/QSOP
Top View
1
2
3
4
5
6
7
8
9
10
20
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
LE
FCT2373T-6
Copyright
漏
2000, Texas Instruments Incorporated
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