PIC16F631T-I/SS - 8-bit 20MHz PIC MCU 1.75KB FLASH SSOP-20
MPN: PIC16F631T-I/SS ✓ Hoạt độngPIC16F631T-I/SS Tóm tắt
A PIC microcontroller is a compact microcontroller unit (MCU) built around a Harvard-architecture RISC core with separate program and data buses, widely used in embedded control applications. The PIC16F631 sits within Microchip's mid-range family, which adds interrupt handling, peripherals, and enhanced instructions to the baseline 14-bit instruction set. MCUs like the PIC16F631 are typically categorized hierarchically as: microcontroller -> embedded controller -> semiconductor IC. This family-level context helps engineers compare against competing 8-bit families such as the Atmel AVR or NXP HC08.
Key differentiating features include 11 I/O pins supporting digital and analog functions, an internal oscillator with selectable frequency options, a 10-bit A/D converter (ADC) with multiple input channels, and nanoWatt technology for ultra-low sleep current. The device supports an operating voltage range of 2.0 V to 5.5 V, two comparators, capture/compare/PWM (CCP) module, and on-chip EEPROM for non-volatile data storage - features that exceed many competing 14/20-pin MCUs in integrated peripheral count.
The PIC16F631T-I/SS uses Microchip's mid-range 14-bit instruction set with a hardware stack and single-cycle branching, providing deterministic interrupt response and predictable timing. The on-board debug support via ICD and the ICSP (In-Circuit Serial Programming) interface simplify firmware development and in-field updates without external programming hardware.
Typical applications include low-cost consumer electronics, white goods, motor control in small BLDC drivers, sensor signal conditioning, LED lighting control, remote controls, and battery-powered IoT edge nodes where nanoWatt sleep modes extend battery life. The wide 2.0V-5.5V supply range supports direct Li-ion battery operation.
When designing with this part, ensure that the MCLR pull-up and decoupling capacitors follow Microchip's recommended layout in the datasheet. Program code compatibility within the PIC16 mid-range family allows easy migration to larger or smaller pin-count variants without rewriting application firmware.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, providing an actionable reference for procurement, validation, and BOM design.
Bộ thay thế dễ dàng lắp đặt cho PIC16F631T-I/SS — 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 PIC16F631T-I/SS (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, ADC, Internal Oscillator, I/O Pins.
PIC16F631-I/SS
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Xem tài liệu →PIC16F631T-I/ML
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Xem tài liệu →PIC16F631-E/SS
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Xem tài liệu →PIC16F631T-I/SS Tỷ lệ tối đa & tính chất điện
| Architecture | PIC16 mid-range 8-bit RISC (14-bit instruction set) |
| Program Memory (Flash) | 1.75 KB (1K x 14) |
| Data SRAM | 64 bytes |
| Data EEPROM | 128 bytes |
| Maximum CPU Clock | 20 MHz |
| Supply Voltage (VDD) | 2.0 V to 5.5 V (industrial operating range) |
| I/O Pins | 11 |
| ADC | 10-bit, multiple channels |
| Comparators | 2 |
| Timers | Timer0, Timer1, Timer2 |
| CCP Module | Yes (Capture/Compare/PWM) |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Hộp | 20-pin SSOP (Shrink Small Outline Package) |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
| Low-Power Mode | nanoWatt technology |
| Trạng thái RoHS | Compliant (Lead-Free) |
Cấu hình chân PIC16F631T-I/SS
| Chân 1 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| Chân 2 | RA5/T1CKI — Digital I/O / Timer1 clock input |
| Chân 3 | RA4 — Digital I/O |
| Chân 4 | RA3/MCLR/VPP — Digital I/O / Master Clear reset (active low) / Programming voltage |
| Chân 5 | RC5 — Digital I/O |
| Chân 6 | RC4 — Digital I/O |
| Chân 7 | RC3 — Digital I/O |
| Chân 8 | RC2 — Digital I/O |
| Chân 9 | RC1 — Digital I/O |
| Chân 10 | RC0 — Digital I/O |
| Chân 11 | RA2 — Digital I/O |
| Chân 12 | RA1 — Digital I/O |
| Chân 13 | RA0 — Digital I/O |
| Chân 14 | VSS — Ground reference |
| Chân 15 | RB4 — Digital I/O |
| Chân 16 | RB5 — Digital I/O |
| Chân 17 | RB6/ICSPCLK — Digital I/O / ICSP clock |
| Chân 18 | RB7/ICSPDAT — Digital I/O / ICSP data |
| Chân 19 | RB0 — Digital I/O |
| Chân 20 | RB1 — Digital I/O |
Ứng dụng tiêu biểu
PIC16F631T-I/SS phù hợp cho 6 Áp dụngs: Low-Cost Consumer Electronics Control, Sensor Signal Conditioning, LED Lighting Control, Battery-Powered IoT Edge Nodes, Small Motor Control (BLDC / Stepper), White Goods and Home Appliances.
Low-Cost Consumer Electronics Control
The PIC16F631T-I/SS is well-suited for low-cost consumer appliances and battery-powered gadgets where BOM cost matters as much as features. Its 1.75 KB Flash accommodates small state-machine firmware while the 10-bit ADC and two analog comparators allow direct sensor interfacing without external signal conditioning. Operating from 2.0 V to 5.5 V supports direct Li-ion or 2x AA battery connection. nanoWatt technology cuts sleep current below 1 uA, making it ideal for always-on remote controls, small appliances, and toys.
Được đề xuất
Sensor Signal Conditioning
Use the PIC16F631T-I/SS as a dedicated analog front-end controller for thermistor, photodiode, or strain-gauge sensor modules. Its on-chip 10-bit ADC, two comparators, and CCP module support waveform capture and PWM excitation of sensors. The 128-byte EEPROM is ideal for storing per-unit calibration coefficients. Industrial -40C to +85C operation allows deployment in unheated enclosures and outdoor IoT sensor nodes.
Được đề xuất
LED Lighting Control
The PIC16F631T-I/SS drives LED arrays via its CCP PWM module, with 10-bit resolution enabling smooth dimming and color-mixing transitions. The wide 2.0-5.5 V supply accepts 3.3 V or 5 V LED driver rails, and nanoWatt sleep modes support always-on standby with sub-uA quiescent draw. Engineered into RGB strips, downlights, and architectural fixtures where small BOM and integrated analog/digital peripherals replace external timer ICs.
Được đề xuất
Battery-Powered IoT Edge Nodes
The PIC16F631T-I/SS powers remote wireless sensor endpoints where sleep current dominates battery life. Its nanoWatt technology reduces quiescent current below 1 uA in sleep, while periodic wake-up via WDT or interrupts drives ADC sampling and short RF bursts. Direct Li-ion or 2x AA operation (2.0-5.5 V) eliminates boost converters. The 128-byte EEPROM retains configuration and network credentials across power cycles.
Được đề xuất
Small Motor Control (BLDC / Stepper)
Leverage the PIC16F631T-I/SS as a low-cost stepper or small BLDC motor controller in fans, pumps, and valve actuators. The CCP module generates step/direction signals, while the two on-chip comparators implement back-EMF sensing for sensorless BLDC commutation. The 20 MHz clock supports smooth commutation at moderate RPMs. Industrial -40C to +85C range allows under-hood automotive aftermarket or HVAC actuator deployment.
Được đề xuất
White Goods and Home Appliances
The PIC16F631T-I/SS integrates control logic, user input sensing, and actuator drive in washing machines, dishwashers, microwaves, and small kitchen appliances. Industrial temperature grade (-40C to +85C) handles the heat of enclosed appliance cabinets. Its 11 I/O pins drive keypads, LEDs, relays, and triac interfaces, while the ADC reads temperature and humidity sensors. Combined with EEPROM-backed user settings, it provides reliable appliance control at minimal cost.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F631T-I/SS — 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 | PIC16F631-I/SS | PIC16F631-E/SS | PIC16F631T-E/SS | PIC16F631T-I/SO | PIC16F631T-I/ML |
|---|---|---|---|---|---|---|
| Package | SSOP-20 | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SOIC-20 (wider body) | QFN-20 (ML) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB |
| Data SRAM | 64 bytes | 64 bytes | 64 bytes | 64 bytes | 64 bytes | 64 bytes |
| Data EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Temperature | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) |
| Packaging Carrier | Tape & Reel (T) | Tube | Tube | Tape & Reel | Tape & Reel | Tape & Reel |
| Price (qty 1, USD) | 1.45 | 1.45 | 1.65 | 1.65 | 1.45 | 1.55 |
Bảo phân biệt quan trọng
- Tape & Reel packaging optimized for SMT production lines (vsPIC16F631-I/SS (tube))
- Industrial temperature grade covers -40C to +85C (vsStandard 'no-grade' PIC16F631 variants)
- Compact SSOP-20 footprint saves PCB area vs SOIC-20 (vsPIC16F631T-I/SO (SOIC-20))
Ghi chú thiết kế
Place a 0.1 uF decoupling capacitor as close as possible to VDD (pin 1) and VSS (pin 14), with a bulk 10 uF tantalum or ceramic capacitor at the supply input. For battery applications with the nanoWatt sleep mode, ensure that any unused I/O pins are configured as outputs driving low (not floating) to minimize sleep current leakage.
The SSOP-20 package has a fine 0.65 mm pitch and ~5.3 mm body width. Per Microchip's recommended footprint, use NSMD pads with a 0.4 mm pad width and 0.4 mm solder mask opening. Keep the MCLR pull-up (typically 10 kohm) within 5 mm of pin 4, and route ICSPCLK/ICSPDAT to test points accessible to the PICkit/ICD header without crossing signal lines.
Configuration word settings (oscillator, WDT, MCLR, code protect) are critical and must match the application - an incorrect configuration word is the #1 cause of 'dead' PIC16F631 boards. Brown-out reset (BOR) should remain enabled for production firmware to prevent code execution corruption during VDD dips. Never leave the MCLR pin floating - always tie through a 10 kohm resistor to VDD.
The PIC16F631T-I/SS is a low-power CMOS MCU with typical active current around 5-8 mA at 20 MHz and 5 V, giving ~25-40 mW dissipation - well within SSOP-20 thermal limits (theta-JA ~80-100 C/W on a standard 4-layer board). No special thermal management is required for typical embedded control duty cycles. In sleep mode, current drops below 1 uA so self-heating is negligible.
Thông tin tuân thủ
RoHS compliant per Microchip product declaration; industrial temperature grade not AEC-Q100 qualified - for automotive applications consult Microchip's automotive-grade PIC portfolio.
