SN74AS4374B Datasheet, PDF (1/5 Pages) Texas Instruments – OCTAL EDGE-TRIGGERED D-TYPE DUAL-RANK FLIP-FLOP WITH 3-STATE OUTPUTS

SN74AS4374B
OCTAL EDGE-TRIGGERED D-TYPE DUAL-RANK FLIP-FLOP
WITH 3-STATE OUTPUTS
SDAS109D – APRIL 1989 – REVISED JANUARY 1995
• 3-State Outputs Drive Bus Lines Directly
• Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic (N) 300-mil DIPs
description
This 8-bit flip-flop features 3-state outputs
designed specifically for driving highly capacitive
or relatively low-impedance loads. It is particularly
suitable for implementing buffer registers, I/O
ports, bidirectional bus drivers, and working
registers.
The eight flip-flops of the SN74AS4374B are
edge-triggered D-type flip-flops. On the second
positive transition of the clock (CLK) input, the Q
outputs are set to the logic levels set up at the data
(D) inputs.
DW OR N PACKAGE
(TOP VIEW)
1Q ₁
2Q ₂
3Q 3
4Q 4
GND 5
5Q 6
6Q 7
7Q 8
8Q 9
OE 10
20 ^1D
19 ^2D
18 3D
17 4D
16 V_CC
15 5D
14 6D
13 7D
12 8D
11 CLK
The output-enable (OE) input does not affect internal operations of the flip-flops. Previously stored data can be
retained or new data can be entered while the outputs are in the high-impedance state.
The SN74AS4374B is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each flip-flop)
INPUTS
OE CLK D†
OUTPUT
Q
H
X
X
Z
L
↑
L
L
L
↑
H
H
L
L
X
Q0
† _{Data presented at the D inputs require}
two clock cycles to appear at the Q
outputs.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1995, Texas Instruments Incorporated
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