PIC16F18876-E/P - 8-Bit MCU 28KB Flash 32MHz 40-PDIP | Microchip
MPN: PIC16F18876-E/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.88 | $28.80 |
| 100 | $2.55 | $255.00 |
| 500 | $2.29 | $1,145.00 |
| 1,000 | $2.04 | $2,040.00 |
PIC16F18876-E/P Overview
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.
Drop-in alternatives for PIC16F18876-E/P — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16F18876-E/P (same form factor and footprint) — differing in Package, Maximum CPU Speed, ADC, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18877-E/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18875-E/P
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC16F18876-I/P
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F18855-E/P
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F18876-E/P Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC (enhanced mid-range, 14-bit instruction word) |
| Family | PIC XLP™ 16F (PIC16F188x6 sub-family) |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| Data SRAM | 2 KB |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz (8 MIPS) |
| Operating Voltage | 1.8 V to 5.5 V |
| I/O Pins | 36 (on 40-pin PDIP) |
| ADC | 12-bit differential, with computation |
| Communication | EUSART, I2C/SMBus, SPI, CAN-FD (F variant only) |
| PWM / CCP | Multiple 16-bit PWM, CCP modules |
| Core Independent Peripherals | CLC, NCO, DSM, HLT, CRC/SCAN |
| Package | 40-pin PDIP (E/P), 15.24 mm row spacing |
| Temperature Range | -40 °C to +125 °C (Extended) |
| Functional Safety | FuSa support (IEC 60730 Class B documentation) |
| RoHS Status | Compliant |
PIC16F18876-E/P Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Pin 2 | RA0/AN0 — PORTA bit 0 / ADC input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / ADC input 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / ADC input 2 |
| Pin 5 | RA3/AN3 — PORTA bit 3 / ADC input 3 / reference voltage |
| Pin 6 | RA4/AN4 — PORTA bit 4 / ADC input 4 |
| Pin 7 | RA5/AN5 — PORTA bit 5 / ADC input 5 |
| Pin 8 | RE0/AN6 — PORTE bit 0 / ADC input 6 |
| Pin 9 | RE1/AN7 — PORTE bit 1 / ADC input 7 |
| Pin 10 | RE2/AN8 — PORTE bit 2 / ADC input 8 |
| Pin 11 | VDD — Positive supply voltage (1.8V-5.5V) |
| Pin 12 | VSS — Ground reference |
| Pin 13 | RA7 — PORTA bit 7 |
| Pin 14 | RA6 — PORTA bit 6 / oscillator |
| Pin 15 | RC0 — PORTC bit 0 |
| Pin 16 | RC1 — PORTC bit 1 |
| Pin 17 | RC2 — PORTC bit 2 |
| Pin 18 | RC3 — PORTC bit 3 |
| Pin 19 | RD0 — PORTD bit 0 |
| Pin 20 | RD1 — PORTD bit 1 |
| Pin 21 | RD2 — PORTD bit 2 |
| Pin 22 | RD3 — PORTD bit 3 |
| Pin 23 | RC4 — PORTC bit 4 |
| Pin 24 | RC5 — PORTC bit 5 |
| Pin 25 | RC6 — PORTC bit 6 / EUSART TX |
| Pin 26 | RC7 — PORTC bit 7 / EUSART RX |
| Pin 27 | RD4 — PORTD bit 4 |
| Pin 28 | RD5 — PORTD bit 5 |
| Pin 29 | RD6 — PORTD bit 6 |
| Pin 30 | RD7 — PORTD bit 7 |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage (1.8V-5.5V) |
| Pin 33 | RB0/INT — PORTB bit 0 / external interrupt |
| Pin 34 | RB1 — PORTB bit 1 |
| Pin 35 | RB2 — PORTB bit 2 |
| Pin 36 | RB3 — PORTB bit 3 |
| Pin 37 | RB4 — PORTB bit 4 |
| Pin 38 | RB5 — PORTB bit 5 |
| Pin 39 | RB6/PGC — PORTB bit 6 / ICD programming clock |
| Pin 40 | RB7/PGD — PORTB bit 7 / ICD programming data |
Typical Applications
PIC16F18876-E/P is suitable for 6 applications: Home Appliance Control (Washing Machines, Refrigerators), Battery-Powered IoT Sensor Node, HVAC Thermostat and Climate Controller, Industrial Sensor Hub (4-20mA Loop Powered), Automotive Body Electronics (Door Modules, Seat Controllers), Consumer Electronics - Remote Controls and Toys.
Home Appliance Control (Washing Machines, Refrigerators)
The PIC16F18876-E/P is a strong fit for white-goods control boards where Functional Safety (IEC 60730 Class B) documentation is mandatory. Its 28KB Flash holds the main wash-cycle state machine plus user-interface routines, while the 2KB SRAM buffers sensor data and the 256B EEPROM stores calibration constants and fault logs that survive power loss. The on-chip CLC and NCO peripherals generate zero-crossing triac timing for heater and motor control without CPU load, freeing the 8-MIPS core for sensor fusion. The Extended (-40°C to +125°C) temperature grade survives steam and compressor-side environments, and the 1.8V-5.5V supply range allows direct connection to 3.3V or 5V HMI displays.
Recommended
Battery-Powered IoT Sensor Node
Battery-powered wireless sensor nodes need nA-range sleep currents to achieve multi-year coin-cell life, and the PIC16F18876-E/P's XLP technology delivers exactly that. In deep sleep with RTCC and WDT active, the device draws well under 1µA, waking on interrupt to take a sensor reading via the 12-bit ADC, transmit via the EUSART-connected radio, and return to sleep. The 1.8V minimum supply matches the voltage curve of two Alkaline or one CR2032 cell, eliminating boost converters. The 28KB Flash fits Thread or Zigbee endpoint stacks on top of application logic, and CLCs handle wake-on-motion logic without CPU intervention, preserving battery for transmission events only.
Recommended
HVAC Thermostat and Climate Controller
Wall-mounted HVAC thermostats combine temperature/humidity sensing, a relay-driven fan, and a backlit LCD user interface - exactly the workload where the PIC16F18876-E/P's CIPs shine. The 12-bit ADC with computation reads NTC thermistors directly, while the NCO generates PWM for proportional damper control. The Hardware Limit Timer (HLT) ensures a fan relay cannot exceed its rated on-time, protecting downstream MOSFETs. The Extended temperature rating handles attic and rooftop equipment enclosures. The 32MHz CPU runs LCD segments at 128Hz without flicker while leaving cycles for BLE pairing via an EUSART-connected module. The 40-pin PDIP form factor makes hand-soldered thermostat prototypes trivial.
Recommended
Industrial Sensor Hub (4-20mA Loop Powered)
Loop-powered 4-20mA industrial transmitters historically used ASICs, but the PIC16F18876-E/P enables a software-defined approach with on-chip peripherals. The 12-bit ADC with PGA measures a bridge sensor with 0.01% resolution; the EUSART drives a HART modem via a small analog front-end; the CLCs implement the HART receive filter in hardware. The 2KB SRAM buffers calibration tables and HART burst data, while the 256B EEPROM stores tag and unit identifiers. The Extended -40°C to +125°C rating covers pipe-side and field-mount enclosures. The 40-pin PDIP allows integration of redundant power and communication in one through-hole assembly.
Recommended
Automotive Body Electronics (Door Modules, Seat Controllers)
Body-control modules - door lock actuators, mirror positioners, seat memory modules - need a robust 8-bit MCU that tolerates automotive temperature swings and load-dump transients. The PIC16F18876-E/P's Extended -40°C to +125°C grade is qualified for cabin environments, and its 5V-tolerant I/O interfaces directly with LIN bus transceivers and H-bridge drivers. The CLCs implement window anti-pinch logic in hardware for IEC 26262 BIST support, while the EUSART drives the LIN master. The 28KB Flash holds the LIN stack plus seat-position lookup tables, and the 256B EEPROM retains user presets through battery disconnects. The 40-pin PDIP suits low-volume aftermarket and service replacements.
Recommended
Consumer Electronics - Remote Controls and Toys
Cost-sensitive consumer products like TV remotes, universal controllers, and hobbyist toys need a low-cost MCU with enough Flash for IR protocols and a low sleep current for years of battery life. The PIC16F18876-E/P's XLP technology delivers 20nA deep-sleep typical, allowing two AAA cells to last the product's life. The 28KB Flash holds the NEC, RC5, RC6, and SIRC IR databases along with a BLE pairing stack. The CLCs implement the 38kHz IR carrier in hardware, freeing the CPU to manage button debouncing and battery monitoring. The 40-pin PDIP is also friendly to hobbyists - a breadboard-friendly footprint keeps learning-curve costs low.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18876-E/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18877-E/P | PIC16F18875-E/P | PIC16F18876-I/P | PIC16F18855-E/P |
|---|---|---|---|---|---|
| Package | 40-pin PDIP (E/P) | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 28 KB | 56 KB (+100%) | 14 KB (-50%) | 28 KB (same) | 14 KB (-50%) |
| RAM | 2 KB | 4 KB (+100%) | 1 KB (-50%) | 2 KB (same) | 1 KB (-50%) |
| EEPROM | 256 bytes | 256 bytes (same) | 256 bytes (same) | 256 bytes (same) | 256 bytes (same) |
| Max CPU Speed | 32 MHz (8 MIPS) | 32 MHz (same) | 32 MHz (same) | 32 MHz (same) | 32 MHz (same) |
| Temperature Range | -40C to +125C (Extended) | -40C to +125C (same) | -40C to +125C (same) | -40C to +85C (Industrial) | -40C to +125C (same) |
| Core Independent Peripherals | CLC, NCO, DSM, HLT, CRC/SCAN | Same set (identical die family) | Same set (identical die family) | Same set (identical silicon) | Same set (subset, fewer I/O) |
Key Differentiators
- Largest Flash density in the 40-pin PDIP PIC16F188x6/7x family at this price point (vs PIC16F18855-E/P)
- Extended temperature grade for harsh environments (vs PIC16F18876-I/P)
- Functional Safety documentation for IEC 60730 Class B appliances (vs PIC16F877A-I/P)
- Lower sleep current than PIC18F alternatives (vs PIC18F46K22-I/P)
Design Notes
Place a 100nF decoupling capacitor as close as possible to each VDD pin (pins 11 and 32), with the ground side returning directly to the nearest VSS pin (pins 12 and 31). Add a 10µF bulk capacitor on the supply rail near the MCU. For sensitive ADC measurements, add a small ferrite bead or 10Ò resistor between the MCU VDD and the analog VDD rail. Keep ICP programming traces (RB6/PGC, RB7/PGD) short and away from switching nodes to ensure reliable in-circuit programming in production.
The MCLR pin (pin 1) requires an external pull-up resistor of 10kΩ to VDD for normal operation. Without this resistor, the device may experience intermittent resets or fail to start. If using the internal MCLR (RE3 disabled), tie MCLR directly to VDD through the resistor. For noisy environments, add a 100nF capacitor from MCLR to VSS to filter high-frequency transients. Estimated: 10kΩ x 1nA quiescent = negligible additional supply load.
Route the HFINTOSC crystal or external oscillator traces symmetrically and surrounded by a ground guard ring to minimize EMI. If using the 32.768 kHz secondary oscillator for RTCC, keep its traces under 5mm and shield with ground pour. The 40-pin PDIP footprint leaves plenty of room for a ground plane underneath the device; route noisy signals (PWM, relay drive) on the opposite side from ADC inputs (RA0-RA5, RE0-RE2) to avoid digital-noise coupling into analog measurements.
Do not exceed 5.5V on any I/O pin, including during hot-plug events - the PIC16F18876 is not 5V-tolerant on I/O when VDD is below 5V. Use an MCP1700 LDO for the 3.3V rail to limit inrush. The internal weak pull-ups on PORTB are disabled by default - enable them in firmware via WPUB register if buttons need pull-up. The LVP (Low-Voltage Programming) bit must be disabled in configuration if not used, otherwise pin RB5 is locked out as I/O.
When using the EUSART for high-speed communication (>1 Mbaud), place a 100Ω series resistor near the TX pin to dampen reflections on the line. For SPI at >4MHz with long PCB traces (>50mm), add a small 22-47pF load capacitor on the SCK line to slow edges and reduce ringback. The MSSP module supports both I2C SMBus and SPI - verify the SDA/SCL traces are under 100mm and matched in length for >400kHz I2C to avoid timing violations.
Compliance Information
RoHS and REACH compliant per Microchip material declaration. Not AEC-Q100 qualified (automotive grade is -VAO suffix variant); for automotive applications choose the -VAO part or PIC18F equivalent. Lead-free (Pb-free) and halogen-free packaging per Microchip environmental compliance documentation.
