PIC12F629-I/P - 8-bit 20MHz Flash MCU 1.75KB | Microchip
MPN: PIC12F629-I/P ✓ Hoạt độngPIC12F629-I/P Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU, program memory (Flash/ROM), data memory (RAM), peripherals, and I/O on one die. The PIC® 12F family sits at the bottom of Microchip's 8-bit hierarchy - smaller than PIC16F and PIC18F parts, and simpler than 16-bit PIC24F or 32-bit PIC32MX MCUs. With only 35 single-word instructions, PIC12F629 enables rapid firmware development for embedded engineers new to the Microchip ecosystem.
Key features include an internal 4MHz/8MHz oscillator (eliminating external crystal requirements), 100,000 erase/write cycle Flash endurance, watchdog timer with independent oscillator, in-circuit serial programming (ICSP), and programmable code protection. The 6 bidirectional I/O pins each support weak pull-ups and interrupt-on-change, with GP5/MCLR/VPP pin configurable for digital I/O when MCLR is disabled.
Technically, the PIC12F629 uses a 14-bit modified Harvard architecture with separate program and data buses, allowing instruction fetch and operand access in the same cycle. The CMOS process yields <1 mA active current at 4MHz/2V, and <1 uA typical standby current - enabling battery-powered applications spanning years from a single coin cell.
Typical applications include consumer appliance control, sensor signal conditioning, LED driving, simple state machines, hobby projects, and educational embedded platforms. The 8-pin footprint and minimal external components suit space-constrained PCBs.
When designing with this device, add a 0.1 uF decoupling capacitor adjacent to VDD, a 4.7k-10k pull-up on MCLR (if not disabled), and verify programming tool compatibility (PICkit 3, PICkit 4, MPLAB SNAP, MPLAB ICD 4 supported).
This page synthesizes distributor pricing, drop-in alternatives, parametric comparisons, and design notes that complement (rather than duplicate) the Microchip datasheet for engineers evaluating PIC12F629-I/P for new designs or legacy maintenance.
Bộ thay thế dễ dàng lắp đặt cho PIC12F629-I/P — 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/P (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, Timers, Instruction Set, ADC.
PIC12F675-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12F617-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12F629-E/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12F615-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12F1840-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12F508-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12F629-I/P Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit (14-bit instruction word, modified Harvard) |
| Program Memory (Flash) | 1.75 KB (1K x 14 words) |
| Data Memory (RAM) | 64 bytes |
| Data EEPROM | 128 bytes |
| Maximum CPU Frequency | 20 MHz (200 ns instruction cycle) |
| I/O Pins | 6 bidirectional GPIO |
| Internal Oscillator | 4 MHz / 8 MHz selectable |
| Timers | 1 x 8-bit/16-bit Timer0 with pre-scaler |
| Analog Comparator | 1 channel |
| ADC | None (PIC12F675 variant has 10-bit ADC) |
| Watchdog Timer | Yes, with independent oscillator |
| ICSP Programming | Yes (In-Circuit Serial Programming) |
| Operating Voltage (VDD) | 2.0 V to 5.5 V |
| Nhiệt độ hoạt động | -40C to +85C (Industrial -I grade) |
| Hộp | 8-pin PDIP (P) |
| Instruction Set | 35 single-word instructions |
| Flash Endurance | 100,000 erase/write cycles typical |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC12F629-I/P
| Chân 1 | GP5/MCLR/VPP — Digital I/O pin GP5 (or MCLR reset input, or ICSP VPP programming voltage) |
| Chân 2 | GP0/AN0/CIN+/ICSPDAT — Digital I/O GP0; comparator non-inverting input; ICSP data |
| Chân 3 | GP1/AN1/CIN-/ICSPCLK — Digital I/O GP1; comparator inverting input; ICSP clock |
| Chân 4 | GP2/COUT/T0CKI — Digital I/O GP2; comparator output; Timer0 clock input |
| Chân 5 | GP3/MCLR/VPP — Input-only GP3; can serve as MCLR reset |
| Chân 6 | GP4/AN3/T1G/OSC2/CLKOUT — Digital I/O GP4; Timer1 gate; oscillator output |
| Chân 7 | GP5/OSC1/CLKIN — Digital I/O GP5; oscillator input |
| Chân 8 | VDD — Positive supply voltage 2.0V to 5.5V |
Ứng dụng tiêu biểu
PIC12F629-I/P phù hợp cho 7 Áp dụngs: Consumer Appliance Control, Battery-Powered Wireless Sensor Nodes (Sub-GHz Companion MCU), LED Lighting Drivers and Effects Controllers, Industrial Sensor Signal Conditioning, Automotive Under-Hood Sub-Systems, Educational and Hobby Embedded Platforms, Simple State Machine and Timing Controllers.
Consumer Appliance Control
The PIC12F629-I/P fits consumer appliance control boards where 6 GPIO, 1 comparator, and 1.75 KB Flash handle simple state machines. The internal 4/8 MHz oscillator eliminates the external crystal BOM, and the industrial temperature grade covers kitchen and laundry environments. With <1 uA standby current and 2.0-5.5 V VDD, the device runs for years from battery or directly from rectified mains via a small regulator. The watchdog timer with independent oscillator ensures recovery from firmware lockup in unattended appliance operation.
Được đề xuất
Battery-Powered Wireless Sensor Nodes (Sub-GHz Companion MCU)
The PIC12F629-I/P pairs with a sub-GHz RF transmitter (MRF49XA, CC1101) as a low-cost sensor-edge MCU in battery-powered nodes. Its 128-byte EEPROM stores calibration constants across power cycles, and 1.75 KB Flash holds sensor-reading routines and interrupt-driven sleep scheduling. The internal oscillator plus 2.0 V minimum VDD enables operation directly from a single 1.5 V AA cell via a boost converter. Brown-out detection prevents undefined behavior during battery end-of-life, and 100,000 Flash erase cycles support field reconfiguration via ICSP.
Được đề xuất
LED Lighting Drivers and Effects Controllers
The PIC12F629-I/P drives RGB LED strips, decorative lighting, and signage effects via PWM-emulated bit-banging on its GPIO pins. Its 20 MHz instruction rate supports flicker-free color transitions with 256-step PWM resolution per channel at 60 Hz refresh. The 128-byte EEPROM retains last state across power cycles, and the internal comparator provides current-limit sensing through a shunt resistor. Industrial temperature rating suits outdoor LED installations and stage lighting fixtures where ambient temperatures fluctuate widely.
Được đề xuất
Industrial Sensor Signal Conditioning
The PIC12F629-I/P serves as a low-cost analog-front-end MCU for industrial 4-20 mA loop sensors, thermocouple cold-junction compensation, and switch-debouncing modules. Its 1 analog comparator digitizes threshold events, while the 64-byte RAM buffers data before transmission. The ICSP programming interface allows field firmware updates via pick-and-place programming fixtures during production calibration. With -40C to +85C industrial temperature rating and 5.5 V VDD tolerance, the device withstands factory-floor transients.
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Automotive Under-Hood Sub-Systems
The PIC12F629-I/P supports non-safety automotive sub-systems such as seat-position encoders, mirror-adjustment switches, and accessory lighting controllers when paired with the -E temperature variant. Its 20 MHz CPU speed and 6 GPIO handle encoder decoding and PWM motor-drive signals. The internal oscillator eliminates external components for vibration resilience, while the ICSP interface supports factory programming and field re-flashing through automotive service tooling. Operating from a regulated 5 V automotive rail at -40C to +85C ensures reliable operation across cabin and engine-bay environments.
Được đề xuất
Educational and Hobby Embedded Platforms
The PIC12F629-I/P is a popular teaching MCU due to its 35-instruction RISC architecture, 8-pin PDIP that fits a breadboard, and broad MPLAB X IDE support. Students learn timer interrupts, comparator-based ADC emulation, and GPIO multiplexing in firmware. The 1.75 KB Flash accommodates small real-world projects (thermometer, dice roller, PWM fan controller) while remaining within the instruction budget for classroom assignments. Programming via PICkit 3/4 or MPLAB SNAP at low cost makes this part ideal for undergraduate embedded-systems labs and maker spaces.
Được đề xuất
Simple State Machine and Timing Controllers
The PIC12F629-I/P implements standalone state machines in vending machines, access control keypads, and irrigation controllers where deterministic timing is critical. Its 1 hardware timer generates interrupt-driven schedules, while 6 GPIO drive relays, solenoids, and indicator LEDs. The watchdog timer prevents firmware lockup in unattended field installations, and the 128-byte EEPROM stores configuration parameters (pulse durations, sensor thresholds) that survive power cycles. With 35 single-cycle instructions, the MCU responds within microseconds to external events.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC12F629-I/P — 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/P | PIC12F617-I/P | PIC12F629-E/P | PIC12F615-I/P | PIC12F1840-I/P | PIC12F508-I/P |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-8 | PDIP-8 - same | PDIP-8 - same | PDIP-8 - same | PDIP-8 - same | PDIP-8 - same | PDIP-8 - same |
| Program Memory (Flash) | 1.75 KB | 1.75 KB - same | 2 KB (+14%) | 1.75 KB - same | 1.4 KB (-20%) | 7 KB (+300%) | 0.75 KB (-57%) |
| RAM | 64 bytes | 64 bytes - same | 128 bytes (+100%) | 64 bytes - same | 64 bytes - same | 256 bytes (+300%) | 25 bytes (-61%) |
| ADC | None | 10-bit, 4 channels | 8-bit, 4 channels | None - same | 10-bit, 4 channels | 10-bit, 4 channels | None - same |
| Maximum CPU Frequency | 20 MHz | 20 MHz - same | 20 MHz - same | 20 MHz - same | 20 MHz - same | 32 MHz (+60%) | 20 MHz - same |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C - same | -40C to +85C - same | -40C to +125C (Extended) | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same |
Bảo phân biệt quan trọng
- SAME PINOUT as PIC12F675 with no ADC (vsPIC12F675-I/P)
- Extended temperature variant available (vsPIC12F629-E/P)
- More mature and lower cost than enhanced 8-bit core (vsPIC12F1840-I/P)
Ghi chú thiết kế
Add a 0.1 uF decoupling capacitor as close as possible (within 5 mm) to the VDD pin (pin 8). For applications with high GPIO switching currents, add a bulk 10 uF tantalum or aluminum electrolytic capacitor at the regulator output. The PIC12F629's <1 uA standby current depends on the watchdog timer being disabled in software; enable WDT only when fault recovery is required, as WDT adds approximately 1-3 uA quiescent current. Brown-out reset (BOR) is recommended for battery-powered designs to prevent code execution at indeterminate VDD voltages below 2.0 V.
GP3 is input-only - never configure it as an output in firmware, or the pin will appear to be stuck low. When MCLR is disabled via configuration bits (CONFIG_MCLRE = OFF), pin 4 becomes a general-purpose digital input, freeing it for application use - but disabling MCLR removes external reset capability. Pin 1 (GP5) serves as both GPIO and VPP programming voltage; if used as output in the application, ensure the ICSP programmer can still drive VPP without contention. Configuration bits must be set explicitly before first code execution - factory default may not match the application.
The 8-pin PDIP package has 2.54 mm (0.1 inch) pin pitch, compatible with standard through-hole breadboards and IC sockets. For production, allow at least 1.5 mm of pad-to-trace clearance to prevent solder bridges during wave soldering. Keep the ICSP programming footprint (3-wire: ICSPCLK, ICSPDAT, VPP, plus VDD and GND) accessible for in-circuit firmware updates - either as test pads or a 5-pin header. Route analog comparator inputs (GP0, GP1) away from high-frequency digital switching traces to minimize coupling noise.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC12F629-E/P for harsh environment. Lead-free and halogen-free per Microchip environmental compliance data.
