Marantz CD110/F1S, Service Manual

Page: 19 / 31

25
IC503/509:74HC08
PIN DESCRIPTION
PIN NO. SYMBOL NAME AND FUNCTION
1, 4, 9, 12 1A to 4A data inputs
2, 5, 10, 13 1B to 4B 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.
FUNCTION TABLE
Note
1. H = HIGH voltage level
L = LOW voltage level
INPUTS OUTPUT
nA nB nY
L
L
H
H
L
H
L
H
L
L
L
H
IC504:74HC166
PIN DESCRIPTION
PIN NO. SYMBOL NAME AND FUNCTION
1
s
serial data input
2, 3, 4, 5, 10, 11, 12, 14 D
0
to D
7
parallel data inputs
6 CE clock enable input (active LOW)
7 CP clock input (LOW-to-HIGH edge-triggered)
8 GND ground (0 V)
9 MR asynchronous master reset (active LOW)
13 Q
7
serial output from the last stage
15 PE parallel enable input (active LOW)
16 V
CC
positive supply voltage
Fig.1 Pin configuration.
Fig.4 Functional diagram.
D