M74HC190RM13TR 데이터 시트보기 (PDF) - STMicroelectronics
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M74HC190RM13TR Datasheet PDF : 14 Pages
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M74HC190
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
INPUTS
LOAD ENABLE D/U
CLOCK
QA
L
X
X
X
a
H
L
L
H
L
H
H
H
X
H
X
X
X : Don’t Care
a - d : The level of steady state inputs a through d respectively
PIN DESCRIPTION
PIN No
3, 2, 6, 7
4
5
11
12
13
14
15, 1, 10, 9
8
16
SYMBOL NAME AND FUNCTION
QA to QD Flip-Flop Outputs
ENABLE
Count Enable Input
(Active LOW)
D/U
Parallel Data Input
LOAD Load Input (Active LOW)
MAX/MIN Terminal Count Output
RCO
Ripple Clock Output
(Active LOW)
CLOCK
Clock Input (LOW to
HIGH, edge triggered)
DATA A to D Data Inputs
GND Ground (0V)
Vcc
Positive Supply Voltage
OUTPUTS
QB
QC
QD
FUNCTION
b
c
UP COUNT
d
PRESET DATA
UP COUNT
DOWN COUNT
DOWN COUNT
NO CHANGE
NO COUNT
NO CHANGE
NO COUNT
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