MARC4 Family
Developer	Eurosil, Temic, Atmel
Manufacturer	Atmel, Eurosil
Type	microcontrollers
Production	1985-2014
Architecture	4-bit, Harvard architecture
ISA	MARC4
Word size	4 bit 0.5 octets 1 nibbles
Technology	CMOS
Clock	32 kHz-8 MHz
Package	SO16, SO20, SO24, SO28, SO44, QFP80

The MARC4 was a family of 4-bit microcontrollers initially developed by Eurosil in the mid 1980s. Eurosil was later sold to Temic (TELEFUNKEN) and in 1998 was sold off to Atmel which continued to manufacture it well into the 2000s. The MARC4 targeted the ultra-low power and wireless market.

History

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Members

Atmel (>=1998)

Part	ROM (Prog)	ROM (Data)	RAM	I/O Ports	Package	Mem Type	Notes
ATAR080	2 kB		256x4 b	12	SO20	ROM
ATAR080-D	2 kB		256x4 b	12	SO20	ROM
ATAR090	2 kB		256x4 b	12	SO20	ROM
ATAR090-C	2 kB		256x4 b	12	SO20	ROM	IR + PWM (manchester code) + 32x16-bit EEPROM
ATAR090-D	2 kB		256x4 b	12	SO20	ROM	IR + RF communication
ATAR092	4 kB		256x4 b	16	SO20	ROM	IR + PWM (manchester code) + phase control
ATAR092-D	4 kB		256x4 b	16	SO20	ROM	IR + PWM (manchester code) + phase control
ATAR890	2 kB		256x4 b	12	SO20	ROM	IR + PWM (manchester code) + phase control + 32x16-bit EEPROM
ATAR890-C	2 kB		256x4 b	12	SO20	ROM	IR + PWM (manchester code)
ATAR892	4 kB		256x4 b	16	SO20	ROM	IR + PWM (manchester code) + phase control + 32x16-bit EEPROM
ATA6020N	2 kB		256x4 b	12	SO20	ROM	low-current
ATAR510	4 kB		256x4 b	34	SO44	ROM	Larger I/O support
ATAM862-3	4 kB	2x512 b	256x4 b	11	SO24	EEPROM	UHF ASK/FSK Transmitter
ATAM862-4	4 kB	2x512 b	256x4 b	11	SO24	EEPROM	UHF ASK/FSK Transmitter
ATAM862-8	4 kB	2x512 b	256x4 b	11	SO24	EEPROM	UHF ASK/FSK Transmitter
ATAM893	4 kB	2x512 b	256x4 b	16	SO20	EEPROM
ATAM893-D	4 kB	2x512 b	256x4 b	16	SO20	EEPROM
ATAM893-J	4 kB	2x512 b	256x4 b	16	SO20	EEPROM
ATAM894	8 kB	2x32x16 b	256x4 b	16	SO24	EEPROM	extended memory
T44C080	2 kB		256x4 b	12	SO20	ROM
T44C080-V	2 kB		256x4 b	12	SO20	ROM	low-current version
T48C510	4 kB		256x4 b	34	SO44	EEPROM
T48C893	4 kB	2x512 b	256x4 b	16	SO20	EEPROM
T48C893-V	4 kB	2x512 b	256x4 b	16	SO20	EEPROM
ATAM893-J	4 kB	2x512 b	256x4 b	16	SO20	EEPROM
ATAM893-D	4 kB	2x512 b	256x4 b	16	SO20	EEPROM
T48C894	8 kB	2x32x16 b	256x4 b	16	SO24	EEPROM

Temic Semi (<1998)

Older TELEFUNKEN parts, they were still manufactured by Atmel for some time after MARC4 transition to Atmel.

Part	ROM	RAM	I/O	Package	Notes
M40C510					Eval chip for M44C510
M43C505	4 kB	253x4 b	12+1	QFP64 PLCC44
M44C090	2 kB	192x4 b	12	SO16	IR encoder + RF
M44C090-H	2 kB	192x4 b	12	SO16	IR encoder + RF + 32x16-bit EEPROM
M44C090-V	2 kB	192x4 b	12	SO20	IR encoder + RF, low-current version
M44C092	4 kB	256x4 b	16	SO20	IR encoder & decoder
M44C092-H	4 kB	256x4 b	16	SO20	IR encoder & decoder + phase control
M44C890	4 kB	256x4 b			IR encoder + RF
M44C890-H	4 kB	256x4 b			IR encoder + RF + 32x16-bit EEPROM
M44C892	4 kB	256x4 b			IR encoder & decoder
M44C892-H	4 kB	256x4 b			IR encoder & decoder + 32x16-bit EEPROM
M44C260	4 kB	256x4 b	11/16	SO20 SO28
M44C510	4 kB	256x5 b	32	DIP40 SO44	IR encoder
M44C510E	4 kB	256x5 b	33	SO44
M44C588	9 kB	2x256x4 b	20+16	QFP80
M45C535					Eval chip for M43C505
M48C260					Eval chip for M44C260
M48C892					Eval chip for M44C090/M44C092

Design

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ISA

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Documents

• MARC4 Microcontrollers Programmer's Guide (Atmel)
• MARC4 User's Guide qFORTH Compiler (Atmel)
• MARC4 Microcontrollers Programmer's Guide (Temic, 1994)
• Atmel MARC4 brochure
• Atmel SMART RF

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