參數(shù)資料
型號(hào): M54HC221AC1R
廠(chǎng)商: 意法半導(dǎo)體
英文描述: DUAL MONOSTABLE MULTIVIBRATOR
中文描述: 雙單穩(wěn)態(tài)觸發(fā)器
文件頁(yè)數(shù): 4/14頁(yè)
文件大小: 288K
代理商: M54HC221AC1R
TRUTH TABLE
INPUTS
B
H
L
X
OUTPUTS
NOTE
A
CLR
H
H
H
H
Q
Q
OUTPUT ENABLE
INHIBIT
INHIBIT
OUTPUT ENABLE
OUTPUT ENABLE
INHIBIT
X
H
L
L
X
L (*)
L (*)
H (*)
H (*)
H
X
L
L
H
X:Don’tCare
(*):Except for monostble period
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1, 9
SYMBOL
1A, 2A
NAME AND FUNCTION
Trigger Inputs (Negative
Edge Triggered)
Trigger Inputs (Positive
Edge Triggered)
Direct Reset LOW and
Trigger Action at Positive
Edge
Outputs (Active LOW)
External Resistor
Capacitor Connection
Outputs (Active HIGH)
External Capacitor
Connection
External Resistor
Capacitor Connection
Ground (0V)
Positive Supply Voltage
2, 10
1B, 2B
3, 11
1CLR,
2CLR
4, 12
7
1Q, 2Q
2R
EXT
/C
EXT
13, 5
14, 6
1Q, 2Q
1C
EXT
2C
EXT
1R
EXT
/C
EXT
15
8
GND
V
CC
16
IEC LOGIC SYMBOL
M54/M74HC221/221A
4/14
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