Datasheet

December 1990 3
Philips Semiconductors Product specification
Quad buffer/line driver; 3-state 74HC/HCT125
PIN DESCRIPTION
PIN NO. SYMBOL NAME AND FUNCTION
1, 4, 10, 13 1
OE to 4OE outputs enable inputs (active LOW)
2, 5, 9, 12 1A to 4A data inputs
3, 6, 8, 11 1Y to 4Y data outputs
7 GND ground (0 V)
14 V
CC
positive supply voltage
Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol.
(a) (b)
Fig.4 Functional diagram. Fig.5 Logic diagram (one buffer).
FUNCTION TABLE
Note
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
INPUTS OUTPUT
nOE nA nY
L
L
H
L
H
X
L
H
Z