PIC16F877-04E/P - 8-Bit 4MHz 14KB Flash MCU | Microchip
MPN: PIC16F877-04E/P ✓ NakahandaPIC16F877-04E/P Ulas
A microcontroller is a programmable system-on-chip that integrates a CPU, memory, I/O, timers, serial interfaces, and optional analog conversion on one die. The PIC16F877 belongs to Microchip's PIC16 8-bit microcontroller family and is commonly used as the central controller in embedded products. Because the PIC16F877 combines 40 I/O lines with several dedicated peripherals, it can coordinate discrete logic, communications, timing, and analog measurements without requiring many external devices.
Verified product information identifies 14 KB of flash program memory, 368 bytes of RAM, 33 I/O, and a 4 MHz operating speed. The Microchip product page also identifies 256 bytes of EEPROM data memory, self-programming, an ICD, eight 10-bit A/D channels, two additional timers, two capture/compare/PWM functions, and a synchronous serial port configurable for SPI or I²C. These resources make the PIC16F877 suitable for legacy industrial controls, instrument panels, sensor interfaces, and compact embedded controllers.
The PIC architecture and 40-pin DIP package support straightforward breadboard prototyping and through-hole PCB assembly. The large package also exposes substantially more I/O than smaller 8-bit devices, which is useful when actuators, displays, relays, and communication peripherals cannot be multiplexed onto a small pin count. Firmware and peripheral configuration must follow the manufacturer PIC16F877 documentation rather than assuming compatibility with unrelated 8-bit MCUs.
A key design consideration is the distinction between electrical compatibility and complete drop-in equivalence. A candidate MCU may use the same 40-pin DIP outline while differing in oscillator behavior, memory map, peripherals, interrupts, timing, voltage limits, or programming interface. Before substitution, engineers should compare the exact MPN, package, pin names, maximum frequency, flash and RAM capacity, ADC behavior, timers, and serial interfaces.
This product page consolidates verified distributor and manufacturer information, a 40-pin package mapping, commercial availability details, and cautious substitution guidance. It also distinguishes verified values from parameters that were not supplied, avoiding unsupported claims and making the resulting engineering comparison easier to audit before a purchase or redesign.
Mga alternatibo na pwedeng ilagay na PIC16F877-04E/P — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok PIC16F877-04E/P (parehas na form factor at footprint) — pagkakaiba sa Package, ADC, Mounting Type, Timers, I/O Pins.
PIC16F877-04/PQ
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16F877-04E/PQ
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16F877-04/PQ
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16F727-I/P
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16F877A-I/P
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16F877-04E/P Mga Pinakamataas na Rating at Electrical Characteristics
| Product Type | 8-bit CMOS flash microcontroller |
| Maksimum na Taktiko ng Oras | 4 MHz |
| Program Memory | 14 KB |
| Program Organization | 8K x 14 words |
| RAM | 368 bytes |
| EEPROM Data Memory | 256 bytes |
| I/O Count | 33 |
| ADC | 8-channel, 10-bit |
| Serial Port | SPI or I²C configurable synchronous serial port |
| Timer Resources | Two additional timers |
| Capture/Compare/PWM | 2 functions |
| Programming Features | Self-programming and ICD |
| Packhaging | 40-pin plastic DIP (40-PDIP) |
| Mounting Technology | Through-hole |
| Temperature Grade | Extended-temperature grade |
| Katayuan ng Lifecycle | Active |
Pin Configuration ng PIC16F877-04E/P
| Pin 1 | MCLR/VPP — Program mode select and master clear reset input |
| Pin 2 | RA0/AN0 — Port A bit 0 or analog input AN0 |
| Pin 3 | RA1/AN1 — Port A bit 1 or analog input AN1 |
| Pin 4 | RA2/AN2/VREF-/CVREF — Port A bit 2 or multiplexed analog function |
| Pin 5 | RA3/AN3/VREF+/CVREF — Port A bit 3 or multiplexed analog function |
| Pin 6 | RA4/T0CKI — Port A bit 4 or Timer0 clock input |
| Pin 7 | RA5/AN4/SS — Port A bit 4 or multiplexed analog and SPI functions |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKIN — Oscillator input or external clock input |
| Pin 10 | OSC2/CLKOUT — Oscillator output or external clock output |
| Pin 11 | RC0/T1OSO — Port C bit 0 or Timer1 oscillator output |
| Pin 12 | RC1/T1OSI/CCP2 — Port C bit 1 or Timer1 oscillator and CCP2 input |
| Pin 13 | RC2/CCP1 — Port C bit 2 or Capture/Compare/PWM pin |
| Pin 14 | RC3/SCK/SCL — Port C bit 3 or SPI clock/I²C clock |
| Pin 15 | RC4/SDI/SDA — Port C bit 4 or SPI data input/I²C data |
| Pin 16 | RC5/SDO — Port C bit 5 or SPI data output |
| Pin 17 | RC6/TX/CK — Port C bit 6 or synchronous serial transmit |
| Pin 18 | RC7/RX/DT — Port C bit 7 or synchronous serial receive |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply input |
| Pin 21 | RB0/INT — Port B bit 0 or external interrupt input |
| Pin 22 | RB1 — Port B bit 1 |
| Pin 23 | RB2 — Port B bit 2 |
| Pin 24 | RB3 — Port B bit 3 |
| Pin 25 | RB4 — Port B bit 4 |
| Pin 26 | RB5 — Port B bit 5 |
| Pin 27 | RB6/PGC — Port B bit 6 or programming clock |
| Pin 28 | RB7/PGD — Port B bit 7 or programming data |
| Pin 29 | VSS — Ground reference |
| Pin 30 | VDD — Positive supply input |
| Pin 31 | RA5 — Port A bit 5 |
| Pin 32 | RA4 — Port A bit 4 |
| Pin 33 | RA3 — Port A bit 3 |
| Pin 34 | RA2 — Port A bit 2 |
| Pin 35 | RA1 — Port A bit 1 |
| Pin 36 | RA0 — Port A bit 0 |
| Pin 37 | RB3 — Port B bit 3 |
| Pin 38 | RB2 — Port B bit 2 |
| Pin 39 | RB1 — Port B bit 1 |
| Pin 40 | RB0 — Port B bit 0 |
Tipikal na mga Gamit
PIC16F877-04E/P ay nararapat para sa 6 aplikasyons: Legacy Industrial Control, Sensor Acquisition Panel, Instrument Control Panel, Communication Gateway, Motor and Actuator Controller, Embedded Educational and Prototype Platform.
Legacy Industrial Control
PIC16F877-04E/P fits legacy industrial control because its 33 I/O lines can connect discrete inputs, relay outputs, status indicators, and operator interfaces while the 4 MHz CPU handles supervisory logic. The 40-PDIP format simplifies repair and through-hole assembly. The eight 10-bit A/D channels and PWM-capable peripherals support basic sensing and actuator tasks, but timing margins are tighter than with faster modern MCUs. Engineers should preserve the original firmware architecture and verify supply levels, isolation requirements, isolation resistors, and environmental limits during any redesign.
Inirekomenda
Sensor Acquisition Panel
The PIC16F877-04E/P can serve as the acquisition controller for a compact sensor panel using its eight 10-bit A/D channels, 33 I/O, and configurable serial interfaces. Inputs can be sampled sequentially, filtered in firmware, and reported through SPI, I²C, or discrete outputs. The 4 MHz clock supports moderate update rates rather than high-bandwidth signal processing. Preserve adequate grounding between analog and digital circuitry, check analog input limits against the official electrical tables, and account for sensor excitation, calibration, and settling time in the acquisition schedule.
Inirekomenda
Instrument Control Panel
PIC16F877-04E/P is practical for instrument panels because 33 I/O can operate displays, keys, indicator lamps, relays, and status lines from one controller. Its 14 KB flash accommodates menu logic, calibration tables, state machines, and communication routines, while 368 bytes of RAM is sufficient for compact working sets but not large display buffers. The PIC16F877 family's ADC and serial capabilities can support analog measurement channels and host communications. Validate timing with worst-case display service routines and keep sensitive analog routing separate from switching and relay outputs.
Inirekomenda
Communication Gateway
PIC16F877-04E/P can act as a small embedded gateway when the design combines SPI or I²C local peripherals with legacy serial or discrete I/O. The configurable synchronous serial port supports 3-wire SPI and 2-wire I²C, allowing the MCU to bridge sensors, converters, EEPROMs, or display drivers while maintaining the original 40-pin controller architecture. Its 4 MHz operating speed and 14 KB flash suit modest message rates. Validate bus capacitance, pull-ups, clock stretching or transaction timing, and protocol error recovery rather than assuming compatibility with faster modern bus masters.
Inirekomenda
Motor and Actuator Controller
PIC16F877-04E/P can supervise motors and actuators through its timers, capture/compare/PWM resources, and broad I/O availability. The device is appropriate for low-to-moderate-speed control loops, position sensing, limit monitoring, and interlock logic where deterministic firmware and a stable legacy platform matter. Its 4 MHz clock and 368-byte RAM constrain very fast or highly concurrent control tasks. Use the MCU for command sequencing and supervisory functions, place power switching in external transistors or motor drivers, and provide isolation where motor transients can disturb sensitive logic.
Inirekomenda
Embedded Educational and Prototype Platform
PIC16F877-04E/P is a useful educational and prototype platform because the 40-PDIP package exposes 33 I/O, power, programming, timers, serial functions, and eight 10-bit A/D channels on an easy-to-solder footprint. Learners can implement digital I/O, PWM, counters, ADC acquisition, EEPROM storage, and SPI or I²C communication without surface-mount assembly. The 14 KB flash and 368-byte RAM make examples easy to understand. For production work, move lessons about decoupling, startup, watchdog behavior, reset pins, analog layout, and current limits directly into the PCB design rather than treating the breadboard prototype as final.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for PIC16F877-04E/P — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | PIC16F877-04/P | PIC16F877-04E/PQ | PIC16F877-04/PQ | PIC16F727-I/P | PIC16F877A-I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-pin plastic DIP (40-PDIP) | 40-pin plastic DIP (40-PDIP) | 40-pin plastic DIP (40-PDIP) | 40-pin plastic DIP (40-PDIP) | 40-pin plastic DIP (40-PDIP) | 40-pin plastic DIP (40-PDIP) |
| Temperature Grade | Extended-temperature E grade | Non-E ordering suffix | E ordering suffix | Non-E ordering suffix | I ordering suffix | I ordering suffix |
Pangunahing mga Pagkakaiba
- Verified 4 MHz and 14 KB flash configuration (kumpara saPIC16F727-I/P)
- E temperature-grade designation (kumpara saPIC16F877-04/P)
- Broad legacy-compatible 40-pin interface (kumpara saPIC16F877A-I/P)
Talaan ng Disenyo
Start the hardware design with the exact verified VDD requirements from Microchip documentation; the supplied snippets identify the device but do not provide numeric supply-voltage or current limits. Provide local decoupling at every VDD and VSS connection, keep the return path continuous, and route high-current loads away from the MCU and analog reference circuitry. The reset and programming pins should remain accessible. Before release, measure startup current, port leakage, ADC reference behavior, and all I/O states across the intended voltage and temperature conditions.
For the 40-pin DIP footprint, preserve the standard through-hole pin numbering and verify the physical orientation with pin 1 marking and the device notch. Keep sensitive analog inputs away from relay, motor-switching, clock, and serial-drive traces. The eight 10-bit ADC channels do not eliminate layout noise: ground returns, reference routing, input filtering, and source impedance must be evaluated together. If replacing the MCU, compare the complete 40-pin signal map, including MCLR, oscillator, programming, power, and every multiplexed peripheral function.
The largest substitution risk is treating every PIC16F877 ordering code as electrically identical. The -04E/P target, -04/P, PQ, I/P, and PIC16F877A variants can differ in temperature grade, package or packing code, oscillator behavior, memory features, peripherals, or errata. A mechanical 40-pin match is not enough. Use the manufacturer ordering information and device documentation to confirm package, speed grade, temperature range, pin functions, programming, and software support before releasing a substitute to production.
Impormasyon ng Pagsunod sa Kautusan
The supplied verified snippets identify the manufacturer, MPN, active lifecycle information, package, memory, speed, and peripherals, but do not provide compliance declarations. No compliance status was inferred.
