Table of Contents
Advertisement
Heathkit3
CIRCUIT
HEATH
COMPONENT
PART
NUMBER
U1
442-54
U2
443-754
U4
443-755
INTEGRATED CIRCUIT IDENTIFICATION
MAYBE
REPLACED
DESCRIPTION
(TOP VIEW)
5-volt regulator
7805
Tri-state
74LS240
inverting buffer
Hex inverter
74LS04
LEAD CONFIGURATION
OUT
OUT
2G
1V1
2A4
1V2
2A3
1Y3
1G
1A1
2A4
1A2
2Y3
1A3
2Y2
Vcc
2CLR
2D
2CK
2PR
1CLR
ID
1CK
1PR
2A2
1Y4
2A1
1A4
2Y1
GND
20
2Q
IQ
IQ
GND
Advertisement
Table of Contents
