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74HC191DB Datasheet(PDF) 4 Page - NXP Semiconductors

Part # 74HC191DB
Description  Presettable synchronous 4-bit binary up/down counter
PDF  14 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HC191DB Datasheet(HTML) 4 Page - NXP Semiconductors

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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
Q0 to Q3
flip-flop outputs
4
CE
count enable input (active LOW)
5
U/D
up/down input
8
GND
ground (0 V)
11
PL
parallel load input (active LOW)
12
TC
terminal count output
13
RC
ripple clock output (active LOW)
14
CP
clock input (LOW-to-HIGH, edge triggered)
15, 1, 10, 9
D0 to D3
data inputs
16
VCC
positive supply voltage
Fig.1 Pin configuration.
Fig.2 Logic symbol.
Fig.3 IEC logic symbol.



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