W78C32B-16 suppliers list
The W78C32B is an 8‑bit CMOS microcontroller with a fully static design, 256 bytes of on‑chip RAM, ROM‑less operation, and a 64 KB program and data address space. It offers four 8‑bit bidirectional ports, three 16‑bit timer/counters, a full‑duplex serial port, and six‑source, two‑level interrupt capability. Power‑saving modes include idle and power‑down, selectable by software.
The document details pin configurations for DIP, PLCC, and QFP packages, describes each port and alternate functions, and lists electrical characteristics such as operating voltage, current consumption, and absolute maximum ratings. Package dimensions and mechanical drawings are also provided.
| Operating Voltage (VCC‑VSS) | -0.3 V to +7.0 V |
|---|---|
| Operating Temperature | 0 °C to 70 °C |
| Storage Temperature | -55 °C to +150 °C |
| Maximum Clock Frequency | 40 MHz |
| Idle Current (Idle mode, VCC = 5.5 V) | 6 mA |
| Power‑down Current (Power‑down mode, VCC = 5.5 V) | 50 µA |
| Input Leakage Current | -10 pA to +10 pA (VPP = 5.5 V) |
| Number of I/O Ports | Four 8‑bit bidirectional ports |
The microcontroller provides two software‑selectable power‑reduction modes: idle mode, which stops the processor clock while keeping peripherals active, and power‑down mode, which stops all clocks including the oscillator.
The device contains 256 bytes of on‑chip scratchpad RAM.
The W78C32B can operate up to 40 MHz.
The microcontroller is offered in 40‑pin DIP, 44‑pin PLCC, and 44‑pin QFP packages.