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74FCT2373CTSOCTG4 Datasheet(PDF) 1 Page - Texas Instruments

No. de pieza 74FCT2373CTSOCTG4
Descripción Electrónicos  8-Bit Latches
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74FCT2373CTSOCTG4 Datasheet(HTML) 1 Page - Texas Instruments

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8-Bit Latches
CY74FCT2373T
CY74FCT2573T
SCCS039 - September 1994 - Revised March 2000
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
Copyright
© 2000, Texas Instruments Incorporated
1CY74FCT2573T
Features
• Function and pinout compatible with the fastest bipolar
logic
•25
Ω output series resistors to reduce transmission line
refelection noise
• FCT-C speed at 4.7 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
• ESD > 2000V
• Fully compatible with TTL input and output logic levels
• Sink current
12 mA
Source current
15 mA
• Extended commercial temp. range of –40˚C to +85˚C
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
Ω termination resistors have
been added to the outputs to reduce system noise caused by
reflections. 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 flip-flops 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.
FCT2373T-1
Logic Block Diagram
Pin Configurations
1
2
3
4
5
6
7
8
9
10
11
12
16
17
18
19
20
13
14
VCC
15
SOIC/QSOP
Top View
O0
D0
D1
O2
D2
D3
O3
D7
D6
O6
O5
D5
D4
O4
LE
OE
GND
O7
O1
CP
D
Q
O0
D0
LE
OE
CP
D
Q
O1
D1
CP
D
Q
O2
D2
CP
D
Q
O3
D3
CP
D
Q
O4
D4
CP
D
Q
O5
D5
CP
D
Q
O6
D6
CP
D
Q
O7
D7
FCT2373T-2
Logic Symbol
FCT2373T
LE
OE
D0
O0
D1
O1
D2
O2
D3
O3
D4
O4
D5
O5
D6
O6
D7
O7
FCT2373T-4
1
2
3
4
5
6
7
8
9
10
11
12
16
17
18
19
20
13
14
VCC
15
SOIC/QSOP
Top View
D0
D1
D2
D4
D5
D6
D7
O1
O2
O3
O4
O5
O6
O7
LE
OE
GND
O0
D3
FCT2373T-6


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