參數(shù)資料
型號: 74HCT191PW
廠商: NXP SEMICONDUCTORS
元件分類: 通用總線功能
英文描述: Presettable synchronous 4-bit binary up/down counter
中文描述: HCT SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, PDSO16
文件頁數(shù): 4/14頁
文件大?。?/td> 108K
代理商: 74HCT191PW
December 1990
4
Philips Semiconductors
Product specification
Presettable synchronous 4-bit binary
up/down counter
74HC/HCT191
PIN DESCRIPTION
PIN NO.
SYMBOL
NAME AND FUNCTION
3, 2, 6, 7
4
5
8
11
12
13
14
15, 1, 10, 9
16
Q
0
to Q
3
CE
U/D
GND
PL
TC
RC
CP
D
0
to D
3
V
CC
flip-flop outputs
count enable input (active LOW)
up/down input
ground (0 V)
parallel load input (active LOW)
terminal count output
ripple clock output (active LOW)
clock input (LOW-to-HIGH, edge triggered)
data inputs
positive supply voltage
Fig.1 Pin configuration.
Fig.2 Logic symbol.
Fig.3 IEC logic symbol.
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