PIC16F18876-E/P
PIC16F18876-E/P - 8-Bit MCU 28KB Flash 32MHz 40-PDIP | Microchip
The Microchip Technology PIC16F18876-E/P is an 8-bit PIC microcontroller in the PIC16F188x6 family featuring 28KB of Flash program memory, 2KB of RAM, and 256 bytes of EEPROM, operating at up to 32MHz from a 1.8V to 5.5V supply in a 40-pin PDIP (E/P) through-hole package. The part integrates Core Independent Peripherals (CIPs), eXtreme Low Power (XLP) technology, and Functional Safety (FuSa) support, making it suitable for general-purpose, low-power, and safety-critical embedded applications. The PIC16F18876 carries the PIC XLP™ 16F family branding and is the Extended (-E) temperature grade variant rated from -40°C to +125°C.
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, integrating a CPU core, non-volatile program memory (Flash), working RAM, EEPROM data storage, and a set of on-chip peripherals such as timers, ADC, communication interfaces, and I/O ports. Within the broader taxonomy, an 8-bit MCU sits below 16-bit and 32-bit MCUs in computational throughput but excels at deterministic, low-power, cost-sensitive tasks. The PIC16F18876 belongs to the PIC (Peripheral Interface Controller) family of microcontrollers -> 8-bit MCU -> microcontroller -> semiconductor -> embedded IC. Microchip's XLP variants are engineered for battery-powered designs where nanoWatt sleep currents and fast wake-up times dominate the design budget.
Key features of the PIC16F18876-E/P include 32MHz internal oscillator, 36 instructions, hardware CRC/SCAN and HLT (Hardware Limit Timer) peripherals, 12-bit ADC with computation, multiple PWM and CCP modules, EUSART, I2C, and SPI communication interfaces, and configurable logic cells (CLC) for hardware-level state-machine glue. The XLP technology enables deep-sleep currents in the nanoampere range, and the Functional Safety documentation assists designers building IEC 60730 Class B appliance-safety firmware.
The PIC16F18876 uses a 14-bit modified Harvard architecture with separate program and data buses, executing one instruction per cycle (except branches) at 32MHz for an 8-MIPS throughput. Its instruction set is orthogonal and predictable, which simplifies compiler code generation. The integrated Core Independent Peripherals - CLC, NCO, DSM, and HLT - operate without CPU intervention, freeing the core for application logic and reducing firmware complexity for tasks like motor commutation, signal generation, and sensor conditioning.
Typical applications include home appliance control (washing machines, refrigerators, induction cookers), IoT sensor nodes, battery-powered metering, automotive body and chassis subsystems, HVAC thermostats, industrial sensor hubs, and small consumer electronics such as remote controls and toys. The wide operating voltage range (1.8V to 5.5V) and 40-pin PDIP footprint make it a drop-in fit for legacy 5V PIC16 and PIC18 designs that need modern CIP integration without a layout change.
When designing with this device, pay attention to the ICP/ICD programming pin assignments (PGC/PGD) and ensure the MCLR pull-up is sized correctly to avoid unintended resets. The 40-pin PDIP footprint provides easy breadboard and socketed prototyping but at the cost of board area; if space is constrained, the same silicon is available in QFN and TQFP packages (PIC16F18876-E/ML, PIC16F18876-E/PT).
This page synthesizes verified distributor pricing, drop-in alternatives, application circuits, and practical design notes not consolidated in a single Microchip document. The 40-pin PDIP package simplifies hobbyist and through-hole manufacturing, while pin-compatible variants in QFN and TQFP allow easy migration to surface mount without firmware changes.
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