PIC16C770-E/P
PIC16C770-E/P - 8-Bit 20MHz 3.5KB OTP MCU 20-PDIP | Microchip
The Microchip Technology PIC16C770-E/P is a member of the PIC® 16C family of 8-bit CMOS microcontrollers featuring 3.5KB (2K x 14) of One-Time-Programmable (OTP) program memory, 256 bytes of RAM, and a 20MHz maximum operating frequency, all housed in a 20-pin PDIP (Plastic DIP, 0.300"/7.62mm) through-hole package. The "-E" suffix indicates the Extended industrial temperature grade of -40°C to +125°C, while "/P" denotes the PDIP package, making this variant suitable for prototyping, legacy designs, and harsh-environment deployments.
What is an 8-bit microcontroller? An 8-bit microcontroller (MCU) is a single-chip computer with an 8-bit data path, typically used for embedded control applications. Within the semiconductor taxonomy, the PIC16C770 belongs to: microcontroller -> 8-bit MCU -> CMOS MCU -> OTP-programmable MCU -> mixed-signal control IC. These devices integrate a CPU core, program memory (ROM/OTP/Flash), data RAM, peripherals, and I/O into a single package, and are widely used where cost, simplicity, and deterministic real-time response outweigh raw throughput.
Key features of the PIC16C770-E/P include its 20MHz maximum clock speed, 14-bit instruction word, 8-level hardware stack, and an instruction set optimized for compact code generation. The device integrates multiple peripherals such as a 10-bit Analog-to-Digital Converter (ADC), comparators, capture/compare/PWM (CCP) modules, USART, and multiple timers. These peripherals are essential for mixed-signal applications, enabling direct interface with sensors, actuators, and communication buses without external ICs.
Architecturally, the PIC16C770 uses a RISC-based Harvard architecture with separate program and data buses, executing most instructions in a single cycle. Its OTP program memory allows one-time field programming using Microchip's development tools (e.g., PICkit, MPLAB X), providing a cost-effective solution for low-to-medium volume production. The 256-byte RAM is well suited for stack-intensive operations and modest data buffering in control loops.
Typical applications include industrial control systems, sensor signal conditioning, motor control interfaces, automotive subsystems (non-safety-critical), and embedded consumer products. The extended temperature range also enables deployment in outdoor or ruggedized equipment. Designers choose this MCU for deterministic interrupt response, low system cost, and a stable, mature toolchain.
When designing with the PIC16C770-E/P, ensure the operating voltage (typically 2.5V–5.5V) and clock configuration match the application. For new designs, consider Flash-based PIC16F series equivalents, as the OTP variant cannot be reprogrammed and requires careful code validation. For prototyping, the 20-pin PDIP is breadboard-friendly, simplifying development cycles.
This page consolidates distributor pricing, drop-in compatible PIC16C family members, and design notes not aggregated on standard distributor pages, providing practical value beyond the manufacturer datasheet.
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