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SN74F574

更新时间: 2024-10-02 22:53:35
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德州仪器 - TI 触发器输出元件
页数 文件大小 规格书
5页 72K
描述
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOP WITH 3-STATE OUTPUTS

SN74F574 数据手册

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SN74F574  
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOP  
WITH 3-STATE OUTPUTS  
SDFS005A – D3034, SEPTEMBER 1987 – REVISED OCTOBER 1993  
DW OR N PACKAGE  
(TOP VIEW)  
Eight D-Type Flip-Flops in a Single  
Package  
3-State Bus-Driving True Outputs  
Full Parallel Access for Loading  
Buffered Control Inputs  
Package Options Include Plastic  
Small-Outline Packages and Standard  
Plastic 300-mil DIPs  
OE  
1D  
2D  
3D  
4D  
5D  
6D  
7D  
8D  
V
CC  
1
2
3
4
5
6
7
8
9
20  
19  
18  
17  
16  
15  
14  
13  
12  
1Q  
2Q  
3Q  
4Q  
5Q  
6Q  
7Q  
8Q  
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.  
GND 10  
11 CLK  
The eight flip-flops of the SN74F574 are edge-triggered D-type flip-flops. On the positive transition of the clock  
(CLK) input, the Q outputs will be set to the logic levels that were set up at the data (D) inputs.  
A buffered output enable (OE) input can be used to place the eight outputs in either a normal logic state (high  
or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive  
the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus  
lines without need for interface or pullup components.  
The output enable (OE) does not affect the internal operations of the flip-flops. Old data can be retained or new  
data can be entered while the outputs are in the high-impedance state.  
The SN74F574 is characterized for operation from 0°C to 70°C.  
FUNCTION TABLE  
(each flip-flop)  
INPUTS  
OUTPUT  
Q
OE  
L
CLK  
D
H
L
H
L
L
L
L
X
X
X
Q
0
H
Z
Copyright 1993, Texas Instruments Incorporated  
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.  
2–1  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  

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