SC/MP-II

National Semiconductor

Simple-to-use Cost-effectiv MicroProcessor
Silicon gate, P-channel Isoplanar LSI technology
Designed to fill the gap between four-bit CPUs (4004, 4040) and eight-bit microprocessors, the SC/MP features a 12-bit address bus, interfacing directly to 4 K bytes of standard memory. +5 V and -7 V volts power supply. Providing CMOS compatibility.
Disadvantage: SC/MP-II is much slower than CPUs in N-Channel MOS technology. The simplest instruction takes five microcycles, each 2 us long – making the SC/MP-II about as fast as the 8008. Nevertheless, SC/MP-II should be attractive in industrial controllers in which speed is not critical.

0.2 MHz