PIC12F629T-I/SN - 8-bit Flash MCU, 1.75KB, 20MHz, SOIC-8 | Microchip
MPN: PIC12F629T-I/SN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.28 | $12.80 |
| 100 | $1.14 | $114.00 |
| 500 | $1.02 | $510.00 |
| 1,000 | $0.91 | $910.00 |
| 3,300 | $0.82 | $2,706.00 |
PIC12F629T-I/SN Overview
A PIC (Peripheral Interface Controller) microcontroller is a compact RISC-based computer-on-a-chip that integrates a CPU, non-volatile program memory (Flash), volatile data memory (SRAM), non-volatile data memory (EEPROM), and configurable digital and analog peripherals into a single IC. Within the broader embedded taxonomy, PIC microcontrollers belong to the microcontroller (MCU) family, which sits under microcontrollers, integrated circuits, and finally semiconductors. Microchip's PIC architecture is widely recognized for its deterministic instruction execution and small footprint.
The PIC12F629T-I/SN delivers six general-purpose I/O pins, one analog comparator, a 16-bit timer with pre-scaler, an 8-bit timer, a Watchdog Timer (WDT) with its own independent oscillator, programmable code protection, and an in-circuit serial programming (ICSP) interface. It supports 2.0V-5.5V operation across the extended industrial temperature range, allowing a single part to cover 3.3V and 5V rails without hardware changes.
Architecturally, the device uses a Harvard-style RISC core with separate program and data buses, enabling simultaneous instruction fetch and operand access. The Flash program memory supports in-circuit programming, allowing firmware updates without removing the part. The 128-byte EEPROM provides non-volatile storage for calibration data, user settings, and serial numbers that must survive power cycles.
Typical applications include consumer appliance control, sensor signal conditioning, low-power remote control transmitters, LED driver sequencers, simple battery chargers, and automotive body electronics subsystems such as lighting controllers and seat-position memories. The combination of small package, low pin count, and integrated EEPROM makes it well suited to replace discrete logic in cost-sensitive designs.
When designing with the PIC12F629T-I/SN, ensure that GP3/MCLR is correctly handled - this pin is only usable as a MCLR reset input in this device and is not available as general-purpose I/O, unlike several other PIC12F variants. Decoupling capacitors of 100 nF should be placed as close as possible to VDD and VSS pins, and unused I/O pins must be configured as outputs to minimize current consumption.
This page synthesizes the manufacturer datasheet, current distributor pricing, drop-in alternatives from the same PIC12F family, and practical design notes not found in any single source.
Drop-in alternatives for PIC12F629T-I/SN — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC12F629T-I/SN (same form factor and footprint) — differing in Timers, Internal Oscillator, Package, ADC, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12F629-I/SN
✅ Drop-In✓ In Stock
$0.82 / Unit
View Datasheet →PIC12F675-I/SN
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →PIC12F615-I/SN
✅ Drop-In✓ In Stock
$0.52 / Unit
View Datasheet →PIC12F617-I/SN
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →PIC12F510-I/SN
✅ Drop-In✓ In Stock
$0.62 / Unit
View Datasheet →PIC12F509-I/SN
✅ Drop-In✓ In Stock
$0.71 / Unit
View Datasheet →PIC12F629T-I/SN Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Program Memory Type | Flash |
| Program Memory Size | 1.75 KB (1K x 14) |
| SRAM | 64 bytes |
| EEPROM | 128 bytes |
| CPU Speed | 20 MHz (200 ns instruction cycle) |
| Number of I/O Pins | 6 |
| Number of Instructions | 35 single-word |
| Supply Voltage | 2.0 V to 5.5 V |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 8-pin SOIC (SN) |
| Mounting Type | Surface Mount |
| Timers | 1 x 8-bit, 1 x 16-bit with pre-scaler |
| Analog Comparator | 1 channel |
| Watchdog Timer | Yes, with independent oscillator |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
| MSL Level | 1 (unlimited floor life) |
| RoHS Status | Compliant |
PIC12F629T-I/SN Pin Configuration
| Pin 1 | VDD — Positive supply voltage |
| Pin 2 | GP5/T1CKI/OSC1/CLKIN — General-purpose I/O / Timer1 clock / Oscillator input |
| Pin 3 | GP4/AN3/T1G/OSC2/CLKOUT — General-purpose I/O / Oscillator output |
| Pin 4 | GP3/MCLR/VPP — Master Clear reset input / Programming voltage |
| Pin 5 | GP2/AN2/T0CKI/INT/COUT — General-purpose I/O / Comparator output |
| Pin 6 | GP1/AN1/CIN-/ICSPCLK — General-purpose I/O / Comparator in- / ICSP clock |
| Pin 7 | GP0/AN0/CIN+/ICSPDAT — General-purpose I/O / Comparator in+ / ICSP data |
| Pin 8 | VSS — Ground reference |
Typical Applications
PIC12F629T-I/SN is suitable for 7 applications: Consumer Appliance Control, Automotive Body Electronics, Industrial Sensor Signal Conditioning, Battery-Powered Remote Controls, LED Driver Sequencing, IoT Edge Sensor Nodes, Smart Home Battery Charger.
Consumer Appliance Control
The PIC12F629T-I/SN is well suited to consumer appliance control boards where its 8-pin SOIC footprint, 1.75 KB Flash, and integrated 128-byte EEPROM fit on small PCAs. Its 25 mA per-pin drive capability sources indicator LEDs and low-current relays directly, while the on-chip comparator handles sensor thresholds without an external op-amp. The 2.0 V to 5.5 V supply range covers both 3.3 V and 5 V designs from a single SKU, simplifying BOM management across product variants. Typical appliances include coffee makers, rice cookers, and small kitchen gadgets where deterministic firmware execution and in-circuit reprogramming shorten development cycles.
Recommended
Automotive Body Electronics
In automotive body electronics such as lighting controllers, seat-position memories, and simple sensor nodes, the PIC12F629T-I/SN provides the right balance of cost, EEPROM, and deterministic timing. Its industrial -40C to +85C temperature rating survives under-dash environments, and the 128-byte EEPROM stores user-configurable parameters such as seat presets that survive battery disconnects. The 6 GPIO pins support switch inputs, LED outputs, and LIN bus wake-up. While not AEC-Q100 qualified itself, it is widely used in non-safety subsystems. Designers should add external ESD protection and reverse-battery protection on VDD.
Recommended
Industrial Sensor Signal Conditioning
The PIC12F629T-I/SN's on-chip analog comparator enables threshold detection and zero-crossing detection directly, eliminating the external op-amp that discrete designs often require. With 1.75 KB Flash and 64-byte SRAM, it accommodates modest calibration routines and lookup tables for sensor linearization. The ICSP interface allows firmware updates and calibration constants to be programmed in-circuit, ideal for factory calibration workflows. Industrial applications include pressure transducers, flow meters, and proximity switches that need EEPROM-backed calibration data surviving power cycles.
Recommended
Battery-Powered Remote Controls
Battery-powered RF and IR remote controls benefit from the PIC12F629T-I/SN's low sleep current, wide 2.0 V to 5.5 V operating range, and small SOIC-8 footprint. Two AA cells can power the design from approximately 3.0 V at fresh to 2.0 V at end-of-life without regulator losses. The on-chip WDT with independent oscillator handles wake-up timing without external components, and the 128-byte EEPROM stores pairing codes and user preferences. The 20 MHz internal oscillator eliminates external crystals, reducing BOM cost and board area for handheld transmitters.
Recommended
LED Driver Sequencing
The PIC12F629T-I/SN's 16-bit timer and PWM capability make it ideal for sequencing multiple LED strings in decorative lighting, signage, and architectural fixtures. Each GPIO can source 25 mA, sufficient for indicator LEDs and small accent lighting strips via external MOSFETs. The Flash-based program memory supports field firmware updates for new lighting patterns, while EEPROM stores user-selected modes and brightness levels. The 20 MHz instruction rate provides smooth fade transitions and color-mixing algorithms without flicker.
Recommended
IoT Edge Sensor Nodes
For simple IoT edge sensor nodes that interface with host processors via UART or I2C, the PIC12F629T-I/SN provides local decision-making and sensor conditioning at very low cost. The on-chip comparator detects analog thresholds, while the ICSP interface supports firmware updates over the air via a companion wireless module. The 128-byte EEPROM stores device calibration, network credentials, and identification data. With 6 I/O pins, the device interfaces with temperature sensors, push-buttons, and a UART-controlled wireless module for compact wireless sensor designs.
Recommended
Smart Home Battery Charger
Single-cell NiMH or Li-ion charger circuits benefit from the PIC12F629T-I/SN's on-chip comparator for voltage termination detection and 128-byte EEPROM for storing charging profiles. The 6 GPIO pins monitor temperature sensors, drive charge FETs, and interface with status LEDs. The wide 2.0 V to 5.5 V operating range supports direct USB power and battery stacks. The Flash memory stores multiple charging algorithms that can be selected by the user, and ICSP enables firmware updates for new battery chemistries without hardware changes.
Recommended
Recommended Products Summary
Engineering reference data for PIC12F629T-I/SN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12F629-I/SN | PIC12F675-I/SN | PIC12F615-I/SN | PIC12F617-I/SN | PIC12F510-I/SN | PIC12F509-I/SN |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-8 (SN) | SOIC-8 (SN) | SOIC-8 (SN) | SOIC-8 (SN) | SOIC-8 (SN) | SOIC-8 (SN) | SOIC-8 (SN) |
| Program Memory | 1.75 KB Flash | 1.75 KB Flash | 1.75 KB Flash | 2 KB Flash | 2 KB Flash | 1.5 KB Flash | 1.5 KB Flash (ROM/OTP) |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 0 bytes | 0 bytes | 0 bytes | 0 bytes |
| ADC | No | No | 10-bit, 4 ch | 10-bit, 4 ch | 10-bit, 4 ch | 8-bit, 3 ch | No |
| CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 8 MHz | 8 MHz |
| Supply 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 | 2.0 V to 5.5 V |
| I/O Pins | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Includes 128-byte EEPROM (vs PIC12F615-I/SN)
- Smaller Flash but full EEPROM support (vs PIC12F675-I/SN)
- Higher CPU speed than PIC10F/older PIC12 baseline (vs PIC12F509-I/SN)
Design Notes
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 1) with traces kept short and direct to VSS (pin 8). For designs with high-current switching loads such as relays or LEDs, add a 10 uF bulk capacitor on VDD to handle transient inrush without voltage droop that could trigger brown-out reset. The PIC12F629T-I/SN does not require an external voltage regulator when supplied from a regulated 2.0 V to 5.5 V source.
Pin 4 (GP3/MCLR) on the PIC12F629 family is fixed as a Master Clear reset input and cannot be used as general-purpose I/O - this differs from several newer PIC12F variants such as PIC12F615/PIC12F617 where GP3 is configurable. Always consult the per-device pinout table before assigning pin functions. To allow in-circuit programming via ICSP, pin 4 must be accessible to the programming header and not be tied directly to VDD.
Use a single solid ground plane on the bottom layer of the PCB with vias stitched around the IC for low-impedance return paths. For mixed-signal designs using the on-chip comparator, keep analog traces (GP0, GP1) short and away from digital switching signals. SOIC-8 land pattern should follow JEDEC MS-012 with thermal pad on the exposed lead if present - the PIC12F629 in SOIC-8 has no thermal pad, so copper fill on top side is sufficient for heat dissipation at typical 5 mA operating currents.
When using the on-chip analog comparator for sensor threshold detection, add a small RC filter (10 kohm and 100 pF) on the comparator input pin to suppress high-frequency noise that could cause false triggers. The comparator output can be routed to GP2 (COUT) for software polling or used as a hardware interrupt via INT on GP2. For sensitive measurements, calibrate the comparator offset in firmware using the internal bandgap reference.
Compliance Information
RoHS and REACH compliant per Microchip product declaration. SOIC-8 package has lead-free (NiPdAu) finish with MSL1 floor life. Not AEC-Q100 qualified; this is an industrial-grade part suitable for -40C to +85C operation but not automotive safety-critical subsystems.
