參數(shù)資料
型號(hào)： M54HC74K1
廠商： STMICROELECTRONICS
元件分類： 鎖存器
英文描述： HC/UH SERIES, DUAL POSITIVE EDGE TRIGGERED D FLIP-FLOP, COMPLEMENTARY OUTPUT, CDFP14
封裝： CERAMIC, DFP-14
文件頁(yè)數(shù)： 5/12頁(yè)
文件大?。?/td> 281K
代理商： M54HC74K1
M54HC74
2/12
Figure 1: IEC Logic Symbols
Figure 2: Input And Output Equivalent Circuit
Table 1: Pin Description
Table 2: Truth Table
X : Don’t Care
PIN N°
SYMBOL
NAME AND FUNCTION
1,13
1CLR,2CLR
Asynchronous Reset -
Direct Input
2, 12
1D, 2D
Data Inputs
3, 11
1CK, 2CK
Clock Input
(LOW-to-HIGH,
Edge-Triggered)
4, 10
1PR,2PR
Asynchronous Set - Direct
Input
5, 9
1Q, 2Q
True Flip-Flop Outputs
6, 8
1Q,2Q
Complement Flip-Flop
Outputs
7
GND
Ground (0V)
14
VCC
Positive Supply Voltage
INPUTS
OUTPUTS
FUNCTION
CLR
PR
DCK
Q
LH
X
LH
CLEAR
H
L
X
H
L
PRESET
L
X
H
----
H
L
H
----
H
L
----
HH
X
Qn
NO CHANGE
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