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SN74HC534 PDF预览

SN74HC534

更新时间: 2024-11-21 23:03:15
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德州仪器 - TI 触发器输出元件
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7页 111K
描述
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS

SN74HC534 数据手册

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SN54HC534, SN74HC534  
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS  
WITH 3-STATE OUTPUTS  
SCLS311A – JANUARY 1996 – REVISED MAY 1997  
SN54HC534 . . . J OR W PACKAGE  
SN74HC534 . . . DW OR N PACKAGE  
(TOP VIEW)  
High-Current 3-State Inverting Outputs Can  
Drive up to 15 LSTTL Loads  
Package Options Include Plastic  
Small-Outline (DW) and Ceramic Flat (W)  
Packages, Ceramic Chip Carriers (FK), and  
Standard Plastic (N) and Ceramic (J)  
300-mil DIPs  
OE  
1Q  
1D  
2D  
2Q  
3Q  
3D  
4D  
4Q  
V
CC  
8Q  
8D  
1
2
3
4
5
6
7
8
9
20  
19  
18  
17 7D  
16 7Q  
15 6Q  
14 6D  
13 5D  
12 5Q  
11 CLK  
description  
These 8-bit flip-flops feature 3-state outputs  
designed specifically for driving highly capacitive  
or relatively low-impedance loads. They are  
particularly suitable for implementing buffer  
registers, I/O ports, bidirectional bus drivers, and  
working registers.  
GND 10  
SN54HC534 . . . FK PACKAGE  
(TOP VIEW)  
The eight flip-flops of the ’HC534 are  
edge-triggered D-type flip-flops. On the positive  
transition of the clock (CLK) input, the Q outputs  
are set to the complement of the logic states that  
were set up at the data (D) inputs. The ’HC534 are  
functionally equivalent to the ’HC374, but the  
’HC534 have inverted outputs.  
3
2
1
20 19  
18  
8D  
7D  
7Q  
2D  
2Q  
3Q  
3D  
4D  
4
5
6
7
8
17  
16  
15 6Q  
14  
9 10 11 12 13  
An output-enable (OE) input places the eight  
outputs in either a normal logic state (high or low  
logic levels) or the 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  
interface or pullup components.  
6D  
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 off.  
The SN54HC534 is characterized for operation over the full military temperature range of –55°C to 125°C. The  
SN74HC534 is characterized for operation from –40°C to 85°C.  
FUNCTION TABLE  
(each flip-flop)  
INPUTS  
OUTPUT  
Q
OE  
L
CLK  
D
H
L
L
L
H
L
H or L  
X
X
X
Q
0
H
Z
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Copyright 1997, 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.  
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  

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