NEC
Type	Public
Founded	July 17, 1899 Tokyo, Japan
Headquarters	Tokyo, Japan
Website	https://www.nec.com/

NEC Corporation Japanese multinational semiconductor and electronics company.

Microprocessors

• SX (vector processors)

• SX-Aurora (microarch)

Families

• Vector Engine

• Type 10A

• Type 10AE

• Type 10B

• Type 10BE

• Type 10C

• Type 10CE

Microcontrollers

• μPD707/μPD708 (1971)
• μPD751 (1973)

• μCOM-4 extended family

• μCOM-4 ISA

• μCOM-42 family

• μPD548

• μPD555

• μCOM-43 family

• μPD546

• μPD553

• μPD556(B)

• μPD557L

• μPD650

• μCOM-44 family

• μPD547

• μPD547L

• μPD552

• μPD651

• μCOM-45 family

• μPD550

• μPD550L

• μPD554

• μPD554L

• μPD652

• μCOM-46 family

Tables

NEC Microcontrollers
Model	Family	Introduction	ROM	RAM	Pins
μPD546	μCOM-43	1977	2000x10 bit	96x4 bit	42
μPD547	μCOM-44	1977	1000x10 bit	64x4 bit	42
μPD547L	μCOM-44L	1978	1000x10 bit	64x4 bit	42
μPD548	μCOM-42	1977	1920x10 bit	96x4 bit	42
μPD550	μCOM-45	1977	640x8 bit	32x4 bit	28
μPD550L	μCOM-45L	1980	640x8 bit	32x4 bit	28
μPD552	μCOM-44H	1978	1000x10 bit	64x4 bit	42
μPD553	μCOM-43H	1978	2000x8 bit	96x4 bit	42
μPD554	μCOM-45	1978	1000x8 bit	32x4 bit	28
μPD554L	μCOM-45L	1981	1000x8 bit	32x4 bit	28
μPD555	μCOM-42 EVACHIP	1977		96x4 bit	64
μPD556 μPD556B	EVACHIP-43	1977		96x4 bit	64
μPD557L	μCOM-43SL	1981	2000x8 bit	96x4 bit	28
μPD650	μCOM-43C	1978	2000x10 bit	96x4 bit	42
μPD651	μCOM-44C	1978	1000x10 bit	64x4 bit	42
μPD652	μCOM-45C	1978	1000x8 bit	32x4 bit	42