PIC12F629-I/SN - 8-Bit 20MHz Flash MCU, 1.75KB | Microchip
MPN: PIC12F629-I/SN ✓ Hoạt độngPIC12F629-I/SN Tóm tắt
An 8-bit microcontroller (MCU) is a small computer-on-a-chip integrating a CPU, non-volatile program memory (Flash or ROM), volatile data memory (RAM), small non-volatile data storage (EEPROM), and peripherals (timers, ADC, GPIO, communication interfaces) on a single CMOS die. The PIC12F629 belongs to Microchip's PIC10/12/16 mid-range 8-bit MCU family, which occupies the same hierarchical role as Atmel/Microchip AVR, NXP S08, and STM8 devices: a sub-tier of microcontroller -> 8-bit microcontroller -> embedded MCU -> semiconductor. It is engineered for low-cost, low-power, deterministic real-time control.
Key features include 6 bidirectional I/O pins with individual direction control, one 8-bit/16-bit timer with pre-scaler, four oscillator options (internal 4MHz, internal 31kHz, external RC, external crystal), in-circuit serial programming (ICSP), and an extended industrial temperature range of -40C to +85C. The Flash-based program memory supports >100,000 erase/write cycles and >40-year retention, simplifying firmware updates and reducing time-to-market.
The PIC12F629 uses a Harvard RISC architecture with separate program and data buses, a hardware multiplier-free ALU, and a deep 8-level hardware stack. The device operates from 2.0V to 5.5V, enabling both 3.3V and 5V system designs. It is fabricated on a low-power CMOS process, achieving typical sleep currents below 1uA with the WDT disabled, making it ideal for battery-powered applications. The PIC12F675 variant adds a 10-bit ADC, while the PIC12F629 focuses purely on digital I/O for lowest cost.
Typical applications include consumer appliance control, LED drivers, sensor interface modules, low-end remote controls, battery chargers, smart toys, security keypads, and small appliances. It is also well-suited to industrial low-power sensor nodes and automotive body electronics when paired with the AEC-Q100 qualified PIC12F629-I/SN variant family.
Design tip: when migrating firmware, leverage MPLAB X IDE with the XC8 compiler and the PICkit 3/4 programmer. Decouple VDD with a 100nF ceramic cap placed within 5mm of the pin; if the internal 4MHz oscillator is used, no external crystal capacitors are required, simplifying BOM.
This page synthesizes distributor pricing, drop-in SOIC-8 alternatives from the same Microchip family, application patterns, and practical design notes - information not consolidated on the manufacturer product page alone.
Bộ thay thế dễ dàng lắp đặt cho PIC12F629-I/SN — 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 PIC12F629-I/SN (cùng hình factor và footprint) — khác nhau ở Package, Timers, Internal Oscillator, Operating Temperature, Core Architecture.
PIC12F675-I/SN
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12F629-I/SNG
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC12F629T-I/SN
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12F508-I/SN
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12F509-I/SN
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12F510-I/SN
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12F615-I/SN
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12F629-I/SN Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Program Memory (Flash) | 1.75 KB (1K x 14 words) |
| Data RAM | 64 bytes |
| Data EEPROM | 128 bytes |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns at 20 MHz |
| Operating Voltage (VDD) | 2.0 V to 5.5 V |
| Number of I/O Pins | 6 (bidirectional) |
| Timers | 1 x 8-bit/16-bit with pre-scaler |
| ADC | None (digital-only MCU) |
| Internal Oscillator | 4 MHz precision (software selectable) |
| Watchdog Timer | Yes, with independent oscillator |
| ICSP (In-Circuit Serial Programming) | Yes |
| Code Protection | Programmable |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 8-pin SOIC (SN) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân PIC12F629-I/SN
| Chân 1 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| Chân 2 | GP5/T1CKI/OSC1/CLKIN — GPIO5 / Timer1 clock input / Oscillator input / External clock input |
| Chân 3 | GP4/!MCLR/OSC2/CLKOUT — GPIO4 / Master Clear (reset, active low) / Oscillator output / Clock out |
| Chân 4 | GP3/!MCLR/!PGM — GPIO3 (input-only) / !MCLR alternate / Low-voltage programming |
| Chân 5 | GP2/T0CKI/INT/COUT — GPIO2 / Timer0 clock input / External interrupt / Comparator output |
| Chân 6 | GP1/CIN-/ICSPCLK — GPIO1 / Comparator inverting input / ICSP clock |
| Chân 7 | GP0/CIN+/ICSPDAT — GPIO0 / Comparator non-inverting input / ICSP data |
| Chân 8 | VSS — Ground reference (0 V) |
Ứng dụng tiêu biểu
PIC12F629-I/SN phù hợp cho 6 Áp dụngs: Consumer Appliance Control, Battery-Powered Sensor Nodes, LED Lighting and Decorative Drivers, IR Remote Control Transmitters, Security Keypads and Access Panels, Smart Toys and Hobby Electronics.
Consumer Appliance Control
The PIC12F629-I/SN fits low-end consumer appliances such as coffee makers, toasters, blenders, and small kitchen electronics where 6 I/O pins and 1.75 KB of Flash are sufficient. Its 2.0-5.5 V supply supports both rectified mains-derived 5 V rails and 3 V battery packs; the internal 4 MHz oscillator removes the need for external crystals, lowering BOM cost by ~$0.10. With 35 instructions and 200 ns execution, the device can scan 4x4 keypads, drive LED indicators via PWM-like bit-banging, and run state-machine logic for safety interlocks. Its -40 to +85 C range survives steam and heat in appliance enclosures, and Flash-based firmware supports field updates via ICSP.
Được đề xuất
Battery-Powered Sensor Nodes
The PIC12F629-I/SN is engineered for battery-powered sensor nodes such as window/door contacts, motion detectors, and remote environmental monitors. Sleep current below 1 uA (WDT disabled) and a 2.0 V minimum supply let the device run for years on two AA cells or CR2032 coin cells. Its internal 4 MHz oscillator eliminates two crystal components, and its INT-on-change wake capability on GP0/GP1/GP3 allows event-driven duty cycling that minimizes average current. With 128 B of EEPROM, calibration constants and tamper counters can be written up to 1M times across the device lifetime, ideal for metering or intrusion-log applications.
Được đề xuất
LED Lighting and Decorative Drivers
The PIC12F629-I/SN drives LED strings, decorative lighting patterns, and small RGB controllers. Bit-banged PWM on 3-4 GPIO pins can deliver 8-bit dimming at >100 Hz, sufficient to eliminate visible flicker. Its 20 MHz clock supports software-generated WS2812 / NeoPixel bit-banging at 800 kHz with margin to spare, enabling 60-LED chain control from a single MCU. The wide 2.0-5.5 V range lets the device power directly from a 3.3 V buck regulator or a 5 V USB rail without level shifters. Industrial temperature grade supports outdoor string-light applications.
Được đề xuất
IR Remote Control Transmitters
The PIC12F629-I/SN is a strong fit for IR remote transmitters used in TV/STB/audio equipment. Its 20 MHz instruction rate can synthesize 38 kHz / 56 kHz carrier PWM in software with sub-microsecond precision, supporting RC5, NEC, SIRC, and proprietary protocols. The 1.75 KB Flash fits NEC and RC5/RC6 protocol stacks plus custom button-mapping tables. GP2 can drive the IR LED via a single transistor, while 4-6 remaining I/Os read the key matrix. Sleep current under 1 uA extends battery life across years of standby, and ICSP allows firmware updates during manufacture.
Được đề xuất
Security Keypads and Access Panels
The PIC12F629-I/SN is well-suited to security keypads, RFID access panels, and door-entry controllers. Its 6 GPIO can scan a 3x4 matrix keypad using only 7 I/O; with an external 74HC138 decoder it scales to 4x4. 128 bytes of EEPROM store access codes, audit trails, and tamper flags with >1M write cycles, sufficient for years of logging. Watchdog timer with independent oscillator protects against code lock-up in unattended installations. Programmable code protection prevents firmware cloning, while ICSP allows factory provisioning. The industrial -40 to +85 C range covers outdoor keypad housings.
Được đề xuất
Smart Toys and Hobby Electronics
The PIC12F629-I/SN drives smart toys, hobby robots, model-train controllers, and educational STEM kits. Its 35-instruction RISC core is widely taught in universities and supported by free MPLAB X + XC8, lowering the learning curve. With 20 MHz speed, hobbyists can generate servo PWM signals, drive small DC motor H-bridges, and read encoder feedback in software. The 8-pin SOIC fits breadboard-friendly breakout boards. ICSP enables reflashing without removing the MCU, ideal for classroom use. 128 B of EEPROM stores calibration, score, and configuration data.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC12F629-I/SN — 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 | PIC12F675-I/SN | PIC12F508-I/SN | PIC12F509-I/SN | PIC12F510-I/SN | PIC12F615-I/SN |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-8 (SN) | SOIC-8 (SN) - same | SOIC-8 (SN) - same | SOIC-8 (SN) - same | SOIC-8 (SN) - same | SOIC-8 (SN) - same |
| Program Memory (Flash) | 1.75 KB | 1.75 KB | 768 B | 1.75 KB | 1.5 KB | 1.75 KB |
| RAM | 64 B | 64 B | 25 B | 41 B | 38 B | 64 B |
| Data EEPROM | 128 B | 128 B | None | None | None | 128 B |
| ADC | None | 10-bit, 4 ch | None | None | 8-bit, 3 ch | 10-bit, 4 ch |
| Max CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Internal Oscillator | 4 MHz | 4 MHz | 4 MHz | 4 MHz + 31 kHz LF | 4 MHz + 31 kHz LF | 8 MHz + 31 kHz LF |
Bảo phân biệt quan trọng
- Internal 4 MHz oscillator eliminates external crystal (vsPIC12F508-I/SN)
- 128-byte on-chip EEPROM (vsPIC12F509-I/SN)
- Digital-only for lowest cost (vsPIC12F675-I/SN)
Ghi chú thiết kế
Decouple VDD (pin 1) with a 100 nF X7R ceramic capacitor placed within 5 mm of the pin and tied to a low-impedance ground plane. For 5 V supplies, an additional 10 uF bulk capacitor near the MCU improves transient response when GP outputs switch simultaneously. The PIC12F629-I/SN draws under 1 uA in sleep (WDT off) and ~11 uA at 4 MHz / 3.3 V active; estimate average current as I_avg = (I_active * t_active + I_sleep * t_sleep) / (t_active + t_sleep). For battery sizing, assume CR2032 self-discharge of ~1% per year plus MCU sleep current.
Use a continuous ground plane beneath the SOIC-8 footprint to minimize EMI and provide thermal sinking. Keep the ICSP pins (GP0/ICSPDAT, GP1/ICSPCLK) accessible - do not route high-frequency signals over them, and consider adding a 2x3 0.1 inch header footprint for in-system programming. If the internal 4 MHz oscillator is used, OSC1/OSC2 (GP5/GP4) can be repurposed as digital I/O, but ensure the CONFIG register has OSC set to INTOSC and !MCLR is disabled on GP3 if used as I/O.
GP3 is input-only and shares pin with !MCLR by default; leaving !MCLR disabled in CONFIG frees GP3 as an input but requires a software reset path. The internal comparator shares pins with GP0/GP1/GP2; if the comparator is enabled, those pins lose digital I/O function. Always program CONFIG bits before main code to prevent the device from hanging in an undefined clock mode. Watchdog timer postscaler must be set in software - enabling WDT with default postscaler can reset the MCU every 18 ms during normal code execution.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Industrial -40 to +85 C operating range; not AEC-Q100 qualified (use automotive-grade PIC variants or external qualification for vehicle applications).
