16-bit MCS-96 MCU for legacy control systems
The Intel TN80C196KC20 is a 16-bit MCS-96 CHMOS microcontroller clocked at 20 MHz, designed for embedded control applications that require a mature, well-characterized architecture. It integrates 48 I/O lines, an 8-channel 10-bit ADC, PWM outputs, and a watchdog timer (WDT) — a peripheral set suited for industrial automation, motor control, and instrumentation panels where deterministic response and a known instruction set matter more than the latest core.
20 MHz clock — what it buys the bus
The 20 MHz clock defines the instruction cycle time for this 16-bit core. For a ROMless part like this one, external program memory access timing is the real constraint — the bus must accommodate the memory's access time at 20 MHz. If you are replacing a failed controller in an existing board, verify that the external EPROM or Flash is rated for the bus speed this part expects.
48 I/O and on-chip ADC — panel-fit check
With 48 I/O lines and an integrated 8-channel 10-bit ADC, this MCU can handle a mix of discrete inputs, relay drivers, and analog sensor feedback without external expanders. The PWM and WDT peripherals cover actuator control and system supervision in a single chip — a BOM consolidation point for a control board that previously used separate ADC and timer ICs.