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SN54F74 PDF预览

SN54F74

更新时间: 2024-11-20 22:15:59
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德州仪器 - TI 触发器
页数 文件大小 规格书
6页 100K
描述
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH CLEAR AND PRESET

SN54F74 数据手册

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SN54F74, SN74F74  
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS  
WITH CLEAR AND PRESET  
SDFS046A – MARCH 1987 – REVISED OCTOBER 1993  
SN54F74 . . . J PACKAGE  
SN74F74 . . . D OR N PACKAGE  
Package Options Include Plastic  
Small-Outline Packages, Ceramic Chip  
Carriers, and Standard Plastic and Ceramic  
300-mil DIPs  
(TOP VIEW)  
1CLR  
1D  
1CLK  
1PRE  
1Q  
V
CC  
2CLR  
1
2
3
4
5
6
7
14  
13  
12  
11  
10  
9
description  
2D  
These devices contain two independent positive-  
edge-triggered D-type flip-flops. A low level at the  
preset (PRE) or clear (CLR) inputs sets or resets  
the outputs regardless of the levels of the other  
inputs. When PRE and CLR are inactive (high),  
data at the data (D) input meeting the setup time  
requirements is transferred to the outputs on the  
positive-going edge of the clock pulse. Clock  
triggering occurs at a voltage level and is not  
directly related to the rise time of the clock pulse.  
Following the hold-time interval, data at the  
D input may be changed without affecting the  
levels at the outputs.  
2CLK  
2PRE  
2Q  
1Q  
GND  
2Q  
8
SN54F74 . . . FK PACKAGE  
(TOP VIEW)  
3
2
1
20 19  
18  
1CLK  
NC  
2D  
17 NC  
4
5
6
7
8
16  
15  
14  
1PRE  
NC  
2CLK  
NC  
The SN54F74 is characterized for operation over  
the full military temperature range of 55°C to  
125°C. The SN74F74 is characterized for  
operation from 0°C to 70°C.  
1Q  
2PRE  
9 10 11 12 13  
FUNCTION TABLE  
INPUTS  
OUTPUTS  
NC – No internal connection  
PRE  
L
CLR  
CLK  
X
D
X
X
X
H
L
Q
H
L
Q
L
H
L
H
X
H
H
L
L
X
H
H
H
H
H
H
L
L
H
H
H
L
X
Q
Q
0
0
The output levels are not guaranteed to meet the  
minimum levels for Furthermore, this  
V
OH  
.
configuration is nonstable; that is, it will not persist  
when PRE or CLR returns to its inactive (high)  
level.  
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  

SN54F74 替代型号

型号 品牌 替代类型 描述 数据表
SN74F74 TI

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