Datasheet

December 1990 3
Philips Semiconductors Product specification
4-bit bidirectional universal shift register 74HC/HCT194
ORDERING INFORMATION
See “74HC/HCT/HCU/HCMOS Logic Package Information” .
PIN DESCRIPTION
PIN NO. SYMBOL NAME AND FUNCTION
1
MR asynchronous master reset input (active LOW)
2D
SR
serial data input (shift right)
3, 4, 5, 6 D
0
to D
3
parallel data inputs
7D
SL
serial data input (shift left)
8 GND ground (0 V)
9, 10 S
0
, S
1
mode control inputs
11 CP clock input (LOW-to-HIGH edge-triggered)
15, 14, 13, 12 Q
0
to Q
3
parallel outputs
16 V
CC
positive supply voltage
Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol.