PIC16F873-04E/SO - 8-bit Flash MCU, 7KB, 22 I/O, SOIC-28 | Microchip
MPN: PIC16F873-04E/SO ✗ Cuối đờiPIC16F873-04E/SO Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and peripheral interfaces. The PIC16F87X family occupies the mid-range tier of Microchip's 8-bit PIC portfolio, sitting between the baseline PIC10/12/16 families and the high-performance PIC18 enhanced family. Flash-based MCUs like this one allow in-circuit re-programming, making them suitable for prototyping and field-upgradeable products. Within the system hierarchy, this part is classified as an 8-bit CISC-style RISC MCU in the embedded controller segment of the semiconductor market.
Key features include a 10-bit Analog-to-Digital Converter (ADC) with up to 8 channels, a USART module for serial communication, an MSSP (Master Synchronous Serial Port) supporting SPI and I2C, two 8-bit timers plus one 16-bit timer, and a watchdog timer with its own on-chip RC oscillator. The nanoWatt Technology features deliver multiple power-managed modes including SLEEP, with typical sleep currents in the microamp range.
Architecturally, the part uses a Harvard bus topology with separate program and data paths, allowing instruction fetch and data access to occur in the same cycle. The 14-bit instruction word packs more capability per opcode than 12-bit baseline parts, but the register set remains compatible with the broader PIC16 mid-range ecosystem for code portability. Brown-out Reset (BOR), Power-on Reset (POR), and the programmable code-protection bitstream are standard on-die features.
Typical applications include industrial sensor nodes, white-goods control boards, low-cost motor controllers, smart meters, automotive body modules (with the -I or -04 extended variants), and standalone peripherals requiring serial bridge functionality. The wide SOIC-28 footprint simplifies hand-soldering and rework for prototype builds.
Design consideration: when migrating between PIC16F873/874/876/877 variants, remember that this -04 part is rated at 4 MHz / 200 ns minimum instruction cycle; for 20 MHz operation, choose the -20 (PIC16F873-20) variant. The 28-pin SOIC package has a thermal resistance theta_JA of approximately 80 C/W which limits continuous dissipation - keep clock-stretched idle states short in thermally enclosed enclosures.
Bộ thay thế dễ dàng lắp đặt cho PIC16F873-04E/SO — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16F873-04E/SO (cùng hình factor và footprint) — khác nhau ở Core Architecture, Package, Mounting Type, Timers, ADC.
PIC16F873-04I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F873T-04E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F876-04E/SO
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F873-04E/SO Tỷ lệ tối đa & tính chất điện
| Family | PIC16F Mid-Range 8-bit |
| Core Architecture | PIC RISC (Harvard) |
| Program Memory Type | Flash |
| Program Memory Size | 7 KB (4K x 14 words) |
| RAM | 192 bytes |
| EEPROM Data Memory | 128 bytes |
| Tần số xung maksimum | 4 MHz (200 ns instruction cycle) |
| Supply Voltage (Vdd) | 4.0 V to 5.5 V |
| I/O Pins | 22 |
| ADC | 10-bit, up to 5 channels |
| Timers | 2 x 8-bit + 1 x 16-bit |
| Communication Interfaces | USART, MSSP (SPI/I2C) |
| Khoảng nhiệt độ hoạt động | -40C to +125C (Extended, "E" suffix) |
| Hộp | 28-pin SOIC (SO), wide-body 0.295 inch (7.50 mm) |
| Kiểu lắp đặt | Surface Mount |
| Instruction Set | 35 single-word instructions |
| Watchdog Timer | Yes (with dedicated on-chip RC oscillator) |
| Power-Saving Modes | SLEEP and nanoWatt Technology modes |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16F873-04E/SO
| Chân 1 | MCLR/VPP/RE3 — Master Clear (reset) input / Programming voltage / PORTE bit 3 |
| Chân 2 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Chân 4 | RA2/AN2/CVREF — PORTA bit 2 / Analog input channel 2 / Comparator voltage reference output |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input channel 3 / ADC positive voltage reference |
| Chân 6 | RA4/T0CKI/C1OUT — PORTA bit 4 / Timer0 clock input / Comparator 1 output |
| Chân 7 | RA5/AN4/SS/C2OUT — PORTA bit 5 / Analog input channel 4 / SPI slave select / Comparator 2 output |
| Chân 8 | VSS — Ground reference |
| Chân 9 | OSC1/CLKIN — Oscillator crystal input / External clock input |
| Chân 10 | OSC2/CLKOUT — Oscillator crystal output / External clock output (FOSC/4) |
| Chân 11 | RB0/INT — PORTB bit 0 / External interrupt input |
| Chân 12 | RB1 — PORTB bit 1 |
| Chân 13 | RB2 — PORTB bit 2 |
| Chân 14 | RB3/PGM — PORTB bit 3 / Low-voltage programming entry |
| Chân 15 | RB4 — PORTB bit 4 |
| Chân 16 | RB5 — PORTB bit 5 |
| Chân 17 | RB6/PGC — PORTB bit 6 / In-Circuit Debugger clock |
| Chân 18 | RB7/PGD — PORTB bit 7 / In-Circuit Debugger data |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply voltage (4.0 V to 5.5 V) |
| Chân 21 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 22 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 module |
| Chân 23 | RC2/CCP1 — PORTC bit 2 / CCP1 (Capture/Compare/PWM) module |
| Chân 24 | RC3/SCK/SCL — PORTC bit 3 / MSSP SPI clock / I2C clock |
| Chân 25 | RC4/SDI/SDA — PORTC bit 4 / MSSP SPI data input / I2C data |
| Chân 26 | RC5/SDO — PORTC bit 5 / MSSP SPI data output |
| Chân 27 | RC6/TX/CK — PORTC bit 6 / USART asynchronous transmit / synchronous clock |
| Chân 28 | RC7/RX/DT — PORTC bit 7 / USART asynchronous receive / synchronous data |
Ứng dụng tiêu biểu
PIC16F873-04E/SO phù hợp cho 6 Áp dụngs: Industrial Sensor Interface Node, Appliance Control Board (White Goods), Low-Cost Serial-to-Bridge Module, Automotive Body Module (Non-Safety), Smart Meter Edge Subsystem, Educational / Hobby Development Board.
Industrial Sensor Interface Node
The PIC16F873-04E/SO fits industrial 4-20 mA sensor interface nodes thanks to its 10-bit ADC (5 channels), 4 MHz deterministic instruction timing, and Extended -40C to +125C temperature rating per the E suffix. In a typical deployment, the MCU digitizes one or more analog transducer signals and exposes the results over the integrated USART (RS-485) or MSSP (I2C) for a host PLC. Its nanoWatt SLEEP mode holds sensor-power draw under 10 uA between samples, and the SOIC-28 wide-body package simplifies hand-rework during commissioning. The 200 ns instruction cycle is fast enough to service ADC, comms, and TIMER1-based sample scheduling without missing events, while the 7KB Flash holds a full command-set interpreter and diagnostics stack.
Được đề xuất
Appliance Control Board (White Goods)
For washing-machine or dishwasher control boards, the PIC16F873-04E/SO provides the right mix of cost, I/O count (22 pins), and ruggedness: the USART drives a UI display, the MSSP in I2C mode talks to a temperature sensor front-end, and the 8-bit Timer2 hardware PWM drives TRIAC-based motor phase control. Per Microchip's PIC16F87X datasheet, the ICSP interface on RB6/RB7 allows firmware tuning on the production line without removing the SOIC-28 part. The Extended temperature rating and built-in brown-out reset keep the part reliable across the wide thermal envelope of laundry equipment, and the 7KB Flash comfortably stores look-up tables for cycle profiles, water-level calibrations, and fault history.
Được đề xuất
Low-Cost Serial-to-Bridge Module
Design engineers use the PIC16F873-04E/SO as a low-cost serial bridge between legacy UART peripherals and a host processor: one USART connects to a 5V sensor string, while MSSP in SPI mode talks to an SPI peripheral, with the MCU repackaging data into a different protocol stream. Its 4 MHz / 200 ns cycle sustains multi-kbaud rates without throttling, and the 22 I/O pins give plenty of GPIO for status LEDs and a fault output. According to Microchip's PIC16F87X family documentation, the part supports in-circuit debugging via ICD on RB6/RB7, letting engineers iterate protocol firmware quickly. The SOIC-28 wide-body is friendly to assembly houses using conservative no-lead reflow profiles.
Được đề xuất
Automotive Body Module (Non-Safety)
Non-safety body electronics such as lighting controllers, mirror adjusters, or seat-position memories can use the PIC16F873-04E/SO with its Extended -40C to +125C rating to ride through cabin temperature extremes. Its 10-bit ADC reads potentiometer wiper voltages, the 16-bit Timer1 times LIN-bus-style intervals, and the PWM outputs ease motor soft-start. The 28-pin SOIC footprint supports the larger-creepage PCB designs typical of under-dash boards. For safety-critical or powertrain modules, Microchip recommends using AEC-Q100 qualified parts such as PIC16F15313-I/SL instead; the E-suffix PIC16F873 is appropriate for cabin comfort modules where functional-safety documentation is not required.
Được đề xuất
Smart Meter Edge Subsystem
In electricity or water-meter edge subsystems, the PIC16F873-04E/SO reads pulses from a metering front-end via its 16-bit Timer1 in counter mode, drives an LCD or LED display via I/O and the MSSP peripheral, and forwards aggregate readings over the USART to a concentrator. Its nanoWatt SLEEP mode keeps battery drain minimal between pulse events, and the brown-out reset ensures the meter keeps its calibration across main-battery swap events. The 4 MHz speed grade is fast enough for 100+ Hz pulse counting, and the 7KB Flash stores calibration coefficients, accumulated readings, and tamper flags per the meter manufacturer's protocol. The wide-body SOIC eases assembly across the long-lifecycle meter product lifespan.
Được đề xuất
Educational / Hobby Development Board
The PIC16F873-04E/SO is a staple of university microcontroller courses and hobby robotics projects because the standard 28-pin SOIC footprint is easy to breadboard with SOIC-to-DIP adapter boards, the ICSP programming scheme needs only two GPIO pins, and 7KB of Flash supports full syllabus-spanning C programs without page banking. The Microchip MPLAB X IDE supports the full PIC16F87X family with free XC8 compiler and in-circuit debugger integration, letting students see register-level effects of their code. The Extended -40C to +125C rating is overkill for a classroom but reinforces the part's reliability for outdoor hobby projects and competitive robotics events. Many legacy reference designs and textbooks from 2000-2010 remain directly applicable.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F873-04E/SO — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16F873-04I/SO | PIC16F873T-04E/SO | PIC16F876-04E/SO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-28 (0.295 inch wide-body) | SOIC-28 (0.295 inch wide-body) - same | SOIC-28 (0.295 inch wide-body) - same | SOIC-28 (0.295 inch wide-body) - same |
| Temperature Range | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +125C (Extended) |
| Maximum Clock Frequency | 4 MHz (200 ns instruction cycle) | 4 MHz | 4 MHz | 4 MHz |
| Flash Program Memory | 7 KB (4K x 14) | 7 KB | 7 KB | 14 KB (8K x 14) |
| RAM | 192 bytes | 192 bytes | 192 bytes | 368 bytes |
| I/O Pins | 22 | 22 | 22 | 22 |
| Operating Voltage | 4.0 V to 5.5 V | 4.0 V to 5.5 V | 4.0 V to 5.5 V | 4.0 V to 5.5 V |
| Packaging Format | Tube (28-pin SOIC) | Tube | Tape and Reel | Tube |
Bảo phân biệt quan trọng
- Extended temperature rating for harsh thermal environments (vsPIC16F873-04I/SO (Industrial grade))
- Doubles Flash and RAM for forward-looking designs (vsPIC16F876-04E/SO (14 KB / 368 B))
- Tube-format production-pack option (vsPIC16F873T-04E/SO (Tape-and-Reel))
Ghi chú thiết kế
Estimated: Power-supply decoupling for the PIC16F873-04E/SO should use a 100 nF ceramic capacitor between VDD (pin 20) and VSS (pin 19) placed within 5 mm of the package, plus a bulk 10 uF tantalum or aluminum-polymer cap at the board power entry. The Microchip PIC16F87X datasheet emphasizes that the brown-out reset (BOR) trip-point accuracy depends on a clean VDD; noisy rails cause spurious resets. Avoid routing high-current switching nodes (relay coils, motors) under or near the MCU's VDD pin to prevent ground-bounce faults. For battery-powered designs, the nanoWatt SLEEP mode with watchdog disabled drops I_DD below 1 uA per the datasheet's typical curve.
Two common pitfalls when using the PIC16F873-04E/SO: (1) confusing the -04E (Extended -40C to +125C) with the -04I (Industrial -40C to +85C) - verify the suffix before committing to a design that runs hot; and (2) choosing -04 instead of -20 for high-speed serial work - the 04 part's 4 MHz oscillator limit restricts USART baud rates to roughly 38.4 kbps at 1.5% error, while the -20 part supports 115.2 kbps. If you later need more code space, the PIC16F876 is a same-footprint upgrade (14 KB Flash / 368 B RAM) per the PIC16F87X family datasheet, but you cannot drop firmware from 876 to 873 if it exceeds 7 KB.
For reliable ICSP programming and in-circuit debugging on the 28-pin SOIC footprint, keep the MCLR/VPP line accessible (one test pad or pull-up to VDD with a 10 kohm resistor and a programming header) and reserve RB6/PGC plus RB7/PGD as a clean 2-pin bus without series resistors greater than 100 ohm. The Microchip PIC16F87X datasheet's AC characteristics list the PGC and PGD slew-rate limits, so source-terminated traces longer than 50 mm need a 33 ohm series resistor. Crystal traces (OSC1/OSC2) should be short, ground-guarded, and routed away from the I/O switching edges to avoid injected jitter on the system clock.
Thông tin tuân thủ
RoHS compliant per Microchip PIC16F87X datasheet and product page. Not AEC-Q100 qualified - use AEC-Q100 grade MCUs (e.g., PIC16F15313-I/SL) for automotive safety-critical applications. REACH compliant per Microchip product page statement. Halogen-free status should be verified from shipment-specific Certificate of Compliance.
