PIC16C774-E/PQ
PIC16C774-E/PQ - 8-Bit MCU, 7KB OTP, 12-bit ADC, 44-MQFP | Microchip
The Microchip Technology PIC16C774-E/PQ is an 8-bit CMOS microcontroller from the PIC16 family built on the RISC architecture, featuring 7KB (4K x 14) of one-time programmable (OTP) program memory, 256 x 8 bytes of RAM, and 33 digital I/O pins, all integrated into a 44-pin MQFP (10x10 mm) surface-mount package. The device executes instructions in a 200 ns cycle at a 20 MHz clock rate, balances powerful processing with a small 35-instruction instruction set, and operates from a single 4.0V to 5.5V supply across a -40C to +125C ambient temperature range suitable for industrial and automotive-grade designs.
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + RAM), and programmable I/O peripherals, used to sense, control, and communicate in embedded systems. PIC microcontrollers sit in the 8-bit MCU category within the broader microcontroller hierarchy (4-bit -> 8-bit -> 16-bit -> 32-bit MCUs -> embedded processors), are widely deployed for deterministic real-time control, and offer low power, low cost, and easy in-circuit programmability. The PIC16C774-E/PQ specifically combines general-purpose digital I/O with high-precision analog conversion, making it a hybrid digital-plus-analog MCU.
Key features include 10 channels of 12-bit A/D conversion (giving designers the ability to discriminate smaller signal changes and reduce external analog signal conditioning), on-chip peripherals for brown-out detect/reset (BOR), power-on reset (POR), pulse-width modulation (PWM), and a watchdog timer (WDT), and serial connectivity via I2C, SPI, and UART/USART. The 12-bit ADC resolution offers 16x the resolution of common 10-bit converters, allowing direct interface with precision sensors without external ADCs.
The PIC16C774 architecture uses a Harvard-style RISC core with separate program/data buses, 14-bit-wide instruction words, and an external oscillator interface. Compared with PIC16C7x predecessors that offer 8-bit ADCs, the 12-bit ADC widens dynamic range by approximately 16x and reduces quantization noise, enabling measurements previously requiring dedicated ADC ICs. The OTP program memory is one-time programmable in-circuit, allowing rapid prototyping without package-specific windowed erase cycles.
Typical applications include industrial automation control, precision sensor signal acquisition, motor and valve control, consumer electronics with analog front ends, automotive body and chassis subsystems, and instrumentation requiring mixed-signal acquisition. The 33 I/O pins and 10 ADC channels suit designs that previously required a microcontroller plus an external ADC.
When designing with this device, note that OTP memory cannot be erased in-circuit. For development, choose the JW windowed ceramic variant, and reserve engineering samples for in-system validation. Decoupling the VDD/VSS pair with 0.1 uF ceramic capacitors close to the pins and following Microchip's recommended oscillator layout minimizes EMI and improves ADC accuracy.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not consolidated on a single manufacturer or distributor product page.
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