NationalSemi > NatSemiINS8040N-6
Modified: May 30, 2005, 6:12 pm
Manufacturer:National Semiconductor
Data Code:8718
Process:3 Micron
Architecture:8 bit MCU
Used in:Control applications
Description:The Intel 8048 microcontroller, Intel's first µC,
was used in the Magnavox Odyssey˛ video game console
and (in its 8042 variant) in the original IBM PC
keyboard. The 8048 is probably the most prominent
member of Intel's MCS-48 familiy of microcontrollers.
It was inspired by, and is somewhat similar to, t
he Fairchild F8 microprocessor.

A 8048-family chip with UV EPROM, the 8749.
This one is made by NEC.The 8048 has a modified
Harvard architecture, with internal or external
program ROM and 64–256 bytes of internal (on-chip) RAM.
The I/O is mapped into its own address space,
separate from programs and data. Though the 8048
was eventually replaced by the very popular Intel
8051, even at the turn of the millennium it remains
quite popular, due to its low cost, wide
availability, memory efficient one-byte instruction
set, and mature development tools. Because of this
it is much used in high-volume consumer electronics
devices such as TV sets, TV remotes, toys, and other
gadgets where cost-cutting is essential.

Device -Internal Memory-
8050 -4Kx8 ROM --256x8 RAM
8049 -2Kx8 ROM --128x8 RAM
8749 -2Kx8 EPROM 128x8 RAM
8048 -1Kx8 ROM --64x8 RAM
8748 -1Kx8 EPROM 64x8 RAM
8040 -none ------256x8 RAM
8039 -none ------128x8 RAM
8038 -none ------64x8 RAM
8035 -none ------64x8 RAM
National was an Intel second source.