PIC16C77-10/PQ
PIC16C77-10/PQ - 14KB OTP 8-bit MCU, 44-PQFP, 20MHz | Microchip
The Microchip Technology PIC16C77-10/PQ is a CMOS, fully-static, OTP-based 8-bit microcontroller belonging to the PIC16C7X mid-range family, offered in a 44-pin Plastic Quad Flat Pack (MQFP/PQFP) package. It executes instructions in a 200 ns single-cycle period (at 20 MHz clock), features 14 KB of program memory and 368 bytes of RAM, and integrates 33 digital I/O lines plus an 8-channel, 8-bit Analog-to-Digital converter, two additional timers, two Capture/Compare/PWM modules, and a synchronous serial port configurable as 3-wire SPI or 2-wire I2C alongside a USART.
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, volatile data memory, and peripheral interfaces on one die. PIC microcontrollers belong to the broader hierarchy: 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor. The PIC16C7X mid-range family is upwardly instruction-compatible with the PIC16C5X baseline and PIC12CXXX devices, allowing code portability across the family while offering richer peripherals.
Key features include 35 single-word instructions, a 4 to 5.5 V supply range, an 8-bit ADC with 8 input channels, hardware USART for asynchronous/synchronous serial communication, a synchronous serial port (SSP) for SPI or I2C master/slave operation, two CCP modules for PWM generation or input capture, two 8-bit timers plus one 16-bit timer (Timer1), and a watchdog timer with its own on-chip RC oscillator. The 44-pin PQFP provides ample I/O for interfacing with displays, sensors, and external memory in commercial-temperature embedded designs.
Architecturally, the PIC16C77 uses a Harvard-style memory organization with separate program and data buses, a 14-bit instruction word, and a peripheral-rich mid-range core that supports priority-based interrupts. The OTP (One-Time-Programmable) program memory is suited to volume production where code is finalized, while the UV-erasable CERDIP variant supports development; the /PQ suffix denotes the windowless Plastic Quad Flat Pack.
Typical applications include industrial control panels, instrumentation, sensor interfacing with on-chip ADC, motor control using CCP/PWM outputs, embedded communication bridges (USART, SPI, I2C), and consumer appliance controllers. The wide I/O count also suits keypad-scanned human-machine interfaces and small graphical LCD drivers.
When designing, observe the 4.0 V minimum supply for oscillator start-up, ensure decoupling capacitors are placed within 1 cm of VDD/VSS pins, and confirm that the ADC acquisition time meets the source-impedance requirements of the chosen analog channel. New designs should evaluate the flash-based PIC16F77 as a direct pin-compatible modern alternative with in-circuit reprogrammability.
This page synthesizes distributor pricing, drop-in alternatives, pinout detail, and practical design notes not found in a single source on the manufacturer datasheet, enabling faster BOM validation and second-source decisions.
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