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Negative voltage regulators used in Commodore and Amiga equipment

IC numbers

79xx, 79Lxx

IC function

Negative voltage regulator

Related components

78xx, 78Lxx (positive voltage regulators)

Component documentation

IC number	Manufacturer	Documentation
MC7905	Motorola (now ON Semiconductor)	Web page, Datasheet (PDF)
LM7905	National Semiconductor (now Texas Instruments)	Web page, Datasheet (PDF)

Component versions

IC number	Package	Voltage	Current	CBM part number	CBM part description
79L05	TO-92	-5V				79L05 available from: Conrad Electronic
7905	TO-220	-5V	1A	901527-03	IC, Voltage Regulator, Fixed Output, TO-220, 7905	L7905CV available from: Conrad Electronic L7905CV available from: Conrad Electronic

Positions

Device	Position	Components	Package
A4000	U198	7905	TO-220
A1060	VR1	7905	TO-220
PC10 I/O board	VR1	7905	TO-220
PC10 combined board	VR1	7905	TO-220
PC10-III	VR501	7905	TO-220
PC30-III	VR501	7905	TO-220
PC40-III	VR501	7905	TO-220
SL286/SL386SX main board	VR601	7905	TO-220
PET assy 8032090	VR1	7905	TO-220
PET assy 8032080	VR1	7905	TO-220
PET assy 8032030	VR1	7905	TO-220
PET assy 320351	VR6	7905	TO-220
SuperPET compu/think board	U61	7905	TO-220
64k PET memory expansion board	VR3	79L05	TO-92

Pinout TO-220

Pin	Function
1	Ground
2	Input
3	Output
case	Input

Pinout TO-92

Pin	Function
1	Ground
2	Input
3	Output

Copyright © 2003-2010 Ronald van Dijk - All rights reserved
Last update: 8 August 2010