CY74FCT2373T Datasheet, PDF (1/6 Pages) Texas Instruments – 8-Bit Latches

1CY74FCT2573T
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CY74FCT2373T
CY74FCT2573T
SCCS039 - September 1994 - Revised March 2000
Features
• Function and pinout compatible with the fastest bipolar
logic
• 25Ω output series resistors to reduce transmission line
refelection noise
• FCT-C speed at 4.7 ns max.
• Reduced V_OH (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
Source current
12 mA
15 mA
• Extended commercial temp. range of –40˚C to +85˚C
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 25Ω 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.
Logic Symbol
Pin Configurations
D₀ D₁ D₂ D₃ D₄ D₅ D₆ D₇
LE
OE
O₀ O₁ O₂ O₃ O₄ O₅ O₆ O₇
FCT2373T-1
Logic Block Diagram
D₀
D₁
D₂
D₃
D₄
D₅
D₆
D₇
LE
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
O₀
O₁
O₂
O₃
O₄
O₅
O₆
O₇
FCT2373T-2
SOIC/QSOP
Top View
OE ₁
O_{0 2}
20 VCC
19 O7
D₀ 3
18 ^D7
D₁ 4
17 ^D6
O_{1 5}
16 ^O6
O₂ 6 ^FCT2373T15 O₅
D_{2 7}
14 D5
D₃ 8
13 D4
O₃ 9
12 O4
GND 10
11 LE
FCT2373T-4
SOIC/QSOP
Top View
OE ₁
D_{0 2}
D₁ 3
D_{2 4}
D_{3 5}
D₄ 6
D_{5 7}
D₆ 8
D₇ 9
GND 10
20 VCC
19 O0
18 ^O1
17 ^O2
16 ^O3
15 ^O4
14 O5
13 O6
12 O7
11 LE
FCT2373T-6
Copyright © 2000, Texas Instruments Incorporated