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Positive voltage regulators used in Commodore and Amiga equipment

IC numbers

78xx, 78Lxx, TL780-xx, LM340, LM323

IC function

Positive voltage regulator

Related components

79xx, 79Lxx (negative voltage regulators)

Component documentation

IC number	Manufacturer	Documentation
µA78L05A	Texas Instruments	Web page, Datasheet (PDF)
MC7805	Motorola (now ON Semiconductor)	Web page, Datasheet (PDF)
MC7812	Motorola (now ON Semiconductor)	Web page, Datasheet (PDF)
LM7805	National Semiconductor (now Texas Instruments)	Web page, Datasheet (PDF)
LM7812	National Semiconductor (now Texas Instruments)	Web page, Datasheet (PDF)
µA7805	Fairchild Semiconductor	Not available
HA17805	Hitachi	Not available
L7812	SGS Microelectronics (now STMicroelectronics)	Datasheet (PDF)
AN7812	Panasonic	Not available
µA7812	Texas Instruments	Web page, Datasheet (PDF)
TL780-05	Texas Instruments	Web page, Datasheet (PDF)
LM340	National Semiconductor (now Texas Instruments)	Web page, Datasheet (PDF)
LM323	National Semiconductor (now Texas Instruments)	Web page, Datasheet (PDF)
	Motorola (now ON Semiconductor)	Datasheet (PDF)

Component versions

IC number	Package	Voltage	Current	CBM part number	CBM part description	Replacement parts
78L05	8-pin SO	5V	100mA	391262-01	Voltage Regulator, 78L05, SM	78L05 available from: Conrad Electronic
7805	TO-220	5V	1A	901527-02	Voltage regulator MC7805CT	7805 available from: Conrad Electronic MC7805CT available from: Conrad Electronic L7805CV available from: Conrad Electronic
LM340-5	TO-3	5V	1A	901528-03	Voltage regulator, LM340-5, +5V/1.5A
TL780-05	TO-220	5V	1.5A	390764-01	TL780-05CKC 5 Volt regulator 2%
LM323	TO-3	5V	3A	901528-01	Volt regulator LM323
7812, LM340-12	TO-220	12V	1A	901527-01	Voltage regulator MC7812CT	7812 available from: Conrad Electronic MC7812CT available from: Conrad Electronic L7812CV available from: Conrad Electronic
7812	TO-3	12V	1A	901528-04	Voltage regulator, 7812, +12V/1A

Positions

Device	Position	Components	Package
A3000T	U198	TL780-05	TO-220
CD³²	U32	78L05	8-pin SO
A2300	IC17	7805	TO-220
A2301	IC17	7805	TO-220
CD1301	IC7	7805	TO-220
CD³² MPEG board	U211	7805	TO-220
	U311	78L05	8-pin SO
C64	VR1	7812, LM340-12	TO-220
	VR2	7805	TO-220
C64C B-3 board	VR1	7812	TO-220
	VR2	7805	TO-220
C128	U59	7812	TO-220
C16	VR1	7805	TO-220
C116	VR1	7805	TO-220
VIC-20	VR1	LM323	TO-3
PET assy 8032090	VR2	7812	TO-3
	VR4	LM323	TO-3
PET assy 8032080	VR2	7812	TO-3
	VR3, VR4	LM340-5	TO-3
PET assy 8032030	VR2	7812	TO-3
	VR3, VR4	LM340-5, LM323	TO-3
PET assy 320351	VR5	7812	TO-3
	VR3, VR4	LM340-5, LM323	TO-3
SuperPET BMB board	VR1, VR2, VR3	7805	TO-220
SuperPET compu/think board	U19	7812	TO-220
	U24	7805	TO-220
SuperPET combo board	VR1, VR2	7805	TO-220
64k PET memory expansion board	VR1	LM340-5	TO-3
	VR2	7812	TO-220
2040 digital board	VR1, VR2	7812	TO-3
	VR3	LM323	TO-3
8050, 8250 digital board	VR1, VR2	7812	TO-3
	VR3	LM323	TO-3
2031 HP	VR1	LM323	TO-3
	VR2	LM340-12	TO-3
2031 LP	VR1	LM340-12	TO-3
	VR2	LM323	TO-3
1540, 1541	VR1	LM340-12	TO-3
	VR2	LM340-5, LM323	TO-3

Pinout TO-220

Pin	Function
1	Input
2	Ground
3	Output
case	Ground

Pinout TO-3

Pin	Function
1	Input
2	Output
case	Ground

Pinout SO

Pin	Function
1	Output
2..3	Ground
4..5	Not connected
6..7	Ground
8	Input

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