PIC16F877A-I/L - 8-bit 20MHz 14KB Flash MCU 44-PLCC | Microchip
Teilenummer: PIC16F877A-I/L ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $11.5634 | $11,56 |
| 10 | $10.21 | $102,10 |
| 100 | $8.74 | $874,00 |
| 500 | $7.83 | $3.915,00 |
| 1.000 | $7.12 | $7.120,00 |
PIC16F877A-I/L Übersicht
What is a PIC16F microcontroller? PIC (Peripheral Interface Controller) microcontrollers from Microchip are 8-bit RISC-based Harvard-architecture MCUs known for deterministic instruction execution, low power consumption, and a small instruction set (typically 35 instructions for the mid-range family). Within the broader taxonomy, the PIC16F877A sits in the PIC16 mid-range family (PIC10/12/16/18 family hierarchy -> 8-bit MCU -> microcontroller -> embedded IC -> semiconductor), which targets applications that need more peripherals and code space than baseline PICs but do not require the 16-bit performance of PIC24/dsPIC devices.
Key features include an integrated 10-bit ADC with up to 8 channels, two 8-bit and one 16-bit timers, two Capture/Compare/PWM (CCP) modules, a USART for asynchronous serial, an MSSP module supporting both SPI and I²C, 256 bytes of EEPROM, in-circuit serial programming (ICSP), and an ICD interface for in-circuit debugging. Operating voltage spans 2.0V to 5.5V, with the industrial temperature grade (-40°C to +85°C) denoted by the 'I' suffix.
Architecturally, the PIC16F877A uses a 14-bit instruction word with separate code and data buses (Harvard), allowing simultaneous instruction fetch and data access. Its 8-level hardware stack and 35-instruction RISC set deliver predictable timing that simplifies real-time control code. FLASH program memory plus self-programming support enables field firmware updates.
Typical applications include industrial process control, motor drives, HVAC, security and alarm panels, instrumentation, automotive body electronics, and legacy embedded products. The 44-PLCC package is socket-friendly, simplifying prototyping and field replacement. Educational platforms and textbook designs have used this part for decades, and pin-compatible successors such as PIC16F887 and PIC18F4520 are common upgrades.
When designing with the PIC16F877A-I/L, ensure decoupling: place 100 nF and 10 µF capacitors near VDD, tie all unused inputs to VDD or ground through 10 kΩ resistors, and respect the maximum 20 MHz clock and 200 ns instruction cycle. The MPLAB X IDE and XC8 compiler provide the standard firmware toolchain.
This page synthesizes distributor pricing, drop-in PIC family alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in-Alternativen für PIC16F877A-I/L – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit PIC16F877A-I/L (gleiche Bauform und Footprint) – abweichend in Program Memory Size, Core Architecture, Mounting Type, RAM Size, Instruction Cycle Time.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC16F887-I/L
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC18F4520-I/L
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC16F877A-E/L
✅ Drop-In✓ Auf Lager
$7.4 / Stück
Datenblatt ansehen →PIC16F874A-I/L
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$5.2 / Stück
Datenblatt ansehen →PIC16F877-20I/L
✅ Drop-In✓ Auf Lager
$9.05 / Stück
Datenblatt ansehen →PIC16F871-I/L
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$2.75 / Stück
Datenblatt ansehen →PIC16F877A-I/L Grenzwerte & elektrische Eigenschaften
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Family | PIC16F mid-range |
| Program Memory | 14 KB FLASH (8K x 14 words) |
| RAM | 368 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns |
| Instruction Set Size | 35 single-word instructions |
| Operating Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 33 digital I/O |
| ADC | 10-bit, up to 8 channels |
| Timers | 2 x 8-bit, 1 x 16-bit |
| CCP Modules | 2 (Capture/Compare/PWM) |
| Serial Interfaces | USART (SCI), MSSP (SPI / I²C) |
| Comparators | 2 |
| In-Circuit Programming | ICSP |
| In-Circuit Debug | Yes (ICD) |
| Gehäuse | 44-pin PLCC (16.59 x 16.59 mm) |
| Betriebstemperatur | -40 °C to +85 °C (industrial grade) |
| Montageart | Surface Mount (PLCC socket compatible) |
PIC16F877A-I/L Pin-Konfiguration
| Pin 1 | MCLR/VPP — Master Clear (Reset) input / programming voltage |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC Vref- |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC Vref+ |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| Pin 8 | RE0/RD/AN5 — PORTE bit 0 / read control / analog input 5 |
| Pin 9 | RE1/WR/AN6 — PORTE bit 1 / write control / analog input 6 |
| Pin 10 | RE2/CS/AN7 — PORTE bit 2 / chip select / analog input 7 |
| Pin 11 | VDD — Positive supply (2.0 V - 5.5 V) |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1/CLKI — Crystal oscillator input / external clock |
| Pin 14 | OSC2/CLKO — Crystal oscillator output / clock out |
| Pin 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / clock input |
| Pin 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Pin 17 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Pin 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I²C clock |
| Pin 19 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| Pin 20 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| Pin 21 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| Pin 22 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| Pin 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I²C data |
| Pin 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 25 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Pin 26 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Pin 27 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| Pin 28 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| Pin 29 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| Pin 30 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply (2.0 V - 5.5 V) |
| Pin 33 | RB0/INT — PORTB bit 0 / external interrupt |
| Pin 34 | RB1 — PORTB bit 1 |
| Pin 35 | RB2 — PORTB bit 2 |
| Pin 36 | RB3/PGM — PORTB bit 3 / LVP programming |
| Pin 37 | RB4 — PORTB bit 4 |
| Pin 38 | RB5 — PORTB bit 5 |
| Pin 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 41 | NC — Not connected (per datasheet) |
| Pin 42 | NC — Not connected (per datasheet) |
| Pin 43 | NC — Not connected (per datasheet) |
| Pin 44 | NC — Not connected (per datasheet) |
Typische Anwendungen
PIC16F877A-I/L ist geeignet für 7 Anwendungs: Industrial Process Control, Motor Control and PWM Drive, HVAC and Building Automation, Security and Alarm Panels, Test and Measurement Instrumentation, Educational and Legacy Embedded Platforms, Automotive Body Electronics (Legacy).
Industrial Process Control
The PIC16F877A-I/L fits industrial process control with its 33 I/O pins for sensor multiplexing, 10-bit ADC (8 channels) for 4-20 mA loop measurements, and USART/MSSP for Modbus RTU or SPI sensor networks. Operating from 2.0 V to 5.5 V and -40 °C to +85 °C industrial temperature, it runs PID loops at the 200 ns instruction cycle rate, easily sampling at sub-millisecond rates for closed-loop valve and heater control. In-circuit debugging via ICD allows on-line tuning without removing the board, and the 256-byte EEPROM stores calibration constants across power cycles. Compared with discrete analog controllers, integrating the PIC16F877A shrinks BOM, reduces drift, and simplifies firmware upgrades via ICSP.
Empfohlen
Motor Control and PWM Drive
The PIC16F877A-I/L suits small motor drives thanks to its two CCP modules generating complementary PWM at up to 20 MHz CPU clock. With a 200 ns instruction cycle, the firmware can implement sensorless trapezoidal commutation for brushless DC motors or variable-frequency PWM for brushed DC and small stepper drives. The 33 digital I/O drive direction logic, brake FETs, and Hall-sensor inputs directly, while the 10-bit ADC samples motor current through a shunt amplifier for closed-loop torque limiting. Hardware protection such as overcurrent trips via the analog comparator completes the integration. The 44-PLCC package and standard 5 V supply simplify retrofitting into existing motor boards.
Empfohlen
HVAC and Building Automation
HVAC controllers benefit from the PIC16F877A-I/L's combination of ADC channels, EEPROM for setpoints, and USART/MSSP for sensor and display buses. Operating from 2.0 V to 5.5 V and industrial temperature range, the MCU reads thermistor bridges via the 10-bit ADC, drives triac outputs through opto-isolators, and logs operating hours in 256-byte EEPROM for service diagnostics. The MSSP port interfaces to I²C temperature/humidity sensors and SPI EEPROM expansion, while the USART communicates with a wall thermostat or Modbus network. Compared with logic-only controllers, the integrated ADC eliminates external multiplexer ICs, reducing board area and cost.
Empfohlen
Security and Alarm Panels
Alarm panels use the PIC16F877A-I/L for its many I/O pins (33) that accept multiple zone inputs, keypad scanning matrices, and PIR sensor feeds, plus the 10-bit ADC for battery-voltage monitoring during mains fail. The 256-byte EEPROM retains user codes and event logs across battery replacement, and ICSP allows field firmware updates without opening the enclosure. The USART links to a GSM or PSTN modem for off-premises reporting, while the MSSP port drives an I²C keypad or LCD expander. Industrial temperature range ensures reliable operation in unconditioned utility closets; FLASH self-programming supports remote firmware updates in service.
Empfohlen
Test and Measurement Instrumentation
Bench instruments use the PIC16F877A-I/L as a system controller: the 10-bit ADC digitizes panel-meter inputs, the MSSP drives an LCD or OLED display, and the USART outputs data to a PC log. The 200 ns instruction cycle and hardware CCP modules handle timing-critical tasks such as frequency counting and PWM generation for stimulus channels. With 368 bytes of RAM, the MCU can buffer measurement sweeps before USB transmission via the USART bridge to an FT232. Industrial temperature range supports laboratory and field environments, and ICSP allows in-the-box firmware updates during calibration.
Empfohlen
Educational and Legacy Embedded Platforms
The PIC16F877A-I/L has been a staple of university embedded courses and hobbyist designs since its introduction, owing to the 44-PLCC socket-friendly package, simple 35-instruction mid-range RISC core, and abundant teaching materials. The 14 KB FLASH accommodates introductory C and assembly projects, while ICSP and ICD allow students to debug in-circuit with low-cost programmers such as PICkit 3. The 33 I/O drive LEDs, character LCDs, keypads, and 7-segment displays directly. The MPLAB X IDE and free XC8 compiler provide a complete toolchain, and pin-compatible PIC16F887/PIC18F4520 paths let students scale up their designs without re-learning the architecture.
Empfohlen
Automotive Body Electronics (Legacy)
While modern AEC-Q100 parts dominate new automotive designs, the PIC16F877A-I/L still appears in legacy aftermarket body modules such as central locking, lighting timers, and accessory controllers. The 33 I/O drive relay coils and sense switches, the 10-bit ADC monitors battery voltage and ambient light sensors, and the USART/MSSP interfaces to wireless remote modules. Industrial temperature range covers in-cabin conditions; FLASH self-programming supports dealer firmware updates. For new automotive designs, AEC-Q100-qualified PIC18 alternatives are recommended.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC16F877A-I/L – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC16F887-I/L | PIC18F4520-I/L | PIC16F877A-E/L | PIC16F877-20I/L |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin PLCC (16.59 x 16.59 mm) | 44-pin PLCC - same | 44-pin PLCC - same | 44-pin PLCC - same | 44-pin PLCC - same |
| Program Memory | 14 KB FLASH | 14 KB FLASH | 32 KB FLASH (+128%) | 14 KB FLASH | 14 KB FLASH |
| RAM | 368 bytes | 368 bytes | 1536 bytes (+308%) | 368 bytes | 368 bytes |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 40 MHz (+100%) | 20 MHz | 20 MHz |
| ADC Channels | 8 x 10-bit | 14 x 10-bit | 13 x 10-bit | 8 x 10-bit | 8 x 10-bit |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +125 °C (extended) | -40 °C to +85 °C |
| Core Architecture | PIC16 mid-range (14-bit instruction) | PIC16 mid-range (14-bit instruction) | PIC18 enhanced (16-bit instruction) | PIC16 mid-range (14-bit instruction) | PIC16 mid-range (14-bit instruction) |
| I/O Pins | 33 | 36 | 36 | 33 | 33 |
Wichtigste Unterscheidungsmerkmale
- Highest pin count and ADC channels in PIC16F family (vs. PIC16F887-I/L)
- Better mid-range instruction compatibility than PIC18 upgrade (vs. PIC18F4520-I/L)
- Extended temperature option for harsh environments (vs. PIC16F877A-I/L vs PIC16F877A-E/L)
Designhinweise
Decouple VDD with both a 100 nF ceramic and a 10 µF electrolytic placed within 5 mm of the VDD pins (pins 11 and 32 on the 44-PLCC). Use a separate analog AVdd path if available; tie unused analog inputs to VDD or VSS through 10 kΩ resistors to prevent ADC channel noise. Brown-out detection (BOR) should be enabled in configuration bits to prevent code runaway on marginal supply. Estimated: total quiescent current is below 20 mA in active mode at 5 V / 20 MHz per Microchip datasheet 39582C, so decoupling is more critical than bulk supply sizing.
Keep the crystal or external clock traces to OSC1/OSC2 short and surrounded by a ground pour to avoid radiating harmonics. Place the ICSP connector (MCLR, VPP, PGD, PGC, VSS, VDD) at the board edge for in-circuit programming access. For 44-PLCC, allow clearance for the PLCC socket/test clip; do not route traces directly under the socket.
Set the CONFIG bits correctly before code download: HS oscillator mode for >4 MHz crystal, WDT off unless deliberately used, and LVP enabled only if RB3/PGM is dedicated to programming. Forgetting to disable the analog function on a digital I/O pin (e.g., AN0-AN7) leaves the digital input buffer disabled and the pin reads zero - configure the corresponding PCFGx bits in ADCON1. MCLR must be pulled up through a 10 kΩ resistor; floating MCLR causes random resets.
When driving long cables from PORTB or PORTC outputs (e.g., RS-232 lines), place 100 Ω series resistors to limit ringing and to protect the MCU from ESD events. For I²C buses, use 4.7 kΩ pull-ups at 5 V and ensure total bus capacitance stays below 400 pF to meet standard-mode timing. The MSSP module hardware manages bus arbitration, but firmware must release the SCL line via clock-stretching wait states when serving slave data.
Estimated: the PIC16F877A-I/L dissipates approximately 200 mW at 5 V / 20 MHz / 33 I/O driving full DC loads. The 44-PLCC package has theta_JA around 50 °C/W, so junction rise is ~10 °C above ambient - no heatsink is needed. At extended temperature grades (-40 °C to +125 °C), verify that output drive current derating in the datasheet still meets the load requirements near the upper temperature limit.
Compliance-Informationen
RoHS and lead-free status confirmed by Microchip product page. Not AEC-Q100 qualified; for automotive designs use AEC-Q100-qualified PIC18 equivalents. REACH status inferred from Microchip compliance statements.
