PIC16F874A-I/P 8-Bit Flash Microcontroller with ADC and USART DIP-40 (PIC16F874A-I/P DIP IC)

The PIC16F874A-I/P is a high-performance, 40-pin 8-bit Flash-based microcontroller from Microchip’s enhanced mid-range family. This "A" version provides improved Flash endurance and more flexible power-management features compared to the original series. It features a powerful RISC architecture with 35 single-word instructions, 7KB of Flash program memory, and 128 bytes of high-endurance EEPROM. A key highlight of this IC is its extensive peripheral set, including an 8-channel 10-bit Analog-to-Digital Converter (ADC), dual Capture/Compare/PWM (CCP) modules, and a Synchronous Serial Port (SSP) supporting SPI and I2C. With 33 I/O pins and a hardware USART, it offers a robust platform for complex control systems in a standard 40-pin DIP package.

This IC is primarily used in industrial automation, multi-point environmental monitoring, and automotive diagnostic tools. It is an exceptionally popular component for Arduino electronics projects in India for building DIY smart irrigation systems, multi-sensor industrial controllers, and advanced embedded gateways that require a high number of analog/digital pins and reliable serial communication.

Key Features

• High-performance RISC CPU with 35 single-word instructions
• 8-channel 10-bit Analog-to-Digital Converter (ADC)
• Two Capture/Compare/PWM (CCP) modules for high-resolution control
• 128 Bytes of high-endurance Data EEPROM (1,000,000 cycles)
• Universal Synchronous Asynchronous Receiver Transmitter (USART/UART)
• Synchronous Serial Port (SSP) with Master SPI and I2C modes
• Parallel Slave Port (PSP) for fast 8-bit parallel communication
• Three hardware timers (2 x 8-bit, 1 x 16-bit)
• In-Circuit Serial Programming (ICSP) and In-Circuit Debug (ICD)
• High current source/sink capability (25mA per I/O)

Specifications

• IC Type = 8-Bit Flash Microcontroller
• Program Memory = 7KB (4096 Words)
• Data RAM = 192 Bytes
• Data EEPROM = 128 Bytes
• ADC Resolution = 10-Bit (8 Channels)
• Maximum Speed = 20MHz
• I/O Pins = 33 (Each programmable for direction)
• Supply Voltage = 2.0V to 5.5V (4.0V-5.5V for 20MHz)
• Current Sink/Source = 25mA
• Package Type = PDIP-40
• Number of Pins = 40
• Mounting Type = Through-Hole
• Operating Temperature = -40 to 85 degrees Celsius

Interfaces

• PIN 1 (MCLR/VPP) = Master Clear / Programming Voltage
• PIN 2 to 5, 7 to 10 (RA0 to RA5, RE0 to RE2) = Port A and E / Analog Inputs
• PIN 13, 14 (OSC1, OSC2) = External Crystal/Oscillator Inputs
• PIN 11, 32 (VDD) = Positive Supply Voltage (5V)
• PIN 12, 31 (VSS) = Ground (0V)
• PIN 15 to 18, 23 to 26 (RC0 to RC7) = Port C / Timers / CCP / USART / SPI / I2C
• PIN 19 to 22, 27 to 30 (RD0 to RD7) = 8-Bit Port D / Parallel Slave Port
• PIN 33 to 40 (RB0 to RB7) = 8-Bit Port B I/O (Interrupt-on-change) / ICSP