PIC16F874-04/PQ

PIC16F874-04/PQ is an 8‑bit Microchip PIC microcontroller from the 16F family. It is a 40‑pin Plastic DIP device (suffix -04/PQ) with Harvard architecture, a 14‑bit instruction word, and an 8‑bit data path. The device runs up to 20 MHz, giving about 5 MIPS.
Key features
- Flash program memory (thousands of words), RAM (a few hundred bytes), and EEPROM for data.
- Peripherals: 8‑channel 10‑bit ADC, several timers (Timer0/1/2), CCP for PWM, USART for serial comms, and an SPI/I2C/MSSP module.
- I/O ports with interrupt capability, on‑chip watchdog timer, BOR, and MCLR for reset.
- Low‑power sleep modes for energy efficiency.
Development and use
- Widely used for learning and small embedded projects.
- Supported by MPLAB X IDE and the XC8 compiler, with abundant example code.
Notes
- For exact memory sizes, pinout, timing, and package details, consult the Microchip PIC16F874 data sheet and the -04/PQ package drawing.

Key features of PIC16F874-04/PQ:
- 8-bit microcontroller (Harvard architecture) with 14‑bit instruction word.
- Flash program memory: 8K x 14 bits.
- RAM: 368 x 8 bits; EEPROM data memory: 256 x 8 bits.
- 8-channel, 10-bit A/D converter with multiplexer; 2 comparators.
- Timers: Timer0 (8‑bit), Timer1 (16‑bit), Timer2 (8‑bit, with PR2).
- Peripherals: CCP1 and CCP2 (PWM/Capture/Compare); EUSART (USART); MSSP (I2C); Parallel Slave Port (PSP).
- Interrupts: multiple sources (multi‑vector capable on devices that support it).
- Power features: Watchdog Timer (WDT), Brown‑out Reset, Power‑on Reset; Sleep mode.
- Operating voltage: 2.0–5.5 V; Maximum clock up to 20 MHz (≈5 MIPS).
- Packaging: common 40‑pin DIP (and other 40‑pin packages).
- Additional: code protection, flash write/erase, In‑Circuit Serial Programming (ICSP).
(Concise overview; exact pinouts and package options depend on variant.)

- Pin count: 40 pins (Plastic DIP package, PQ).
- Function: PIC16F874-04/PQ is an 8-bit Microcontroller unit (MCU) from Microchip with on-chip flash memory, RAM and EEPROM, plus peripherals (ADC, timers, CCP, serial interfaces, I/O ports) for embedded control applications.

- Manufacturer: Microchip Technology Inc.
- Company type: An American multinational semiconductor company that designs and manufactures microcontrollers and other embedded control solutions (memory, analog, etc.). Headquarters: Chandler, Arizona.

- Small embedded controllers for consumer and automotive electronics
- Data acquisition/instrumentation with multi-channel ADC
- Motor/actuator control (PWM/CCP for DC motors and stepper motors)
- Digital interfaces (I2C/SPI, multiple I/O)
- Portable/battery-powered instruments (low power, timers)
- Process control and automation (temperature, pressure, flow)
- Home automation and appliance control
- Education, prototyping and hobby kits

PDIP-40 (Plastic DIP, 40-pin) through-hole package.