PIC12C671-10I/MF - 8-Bit 10MHz OTP MCU, 8-DFN-S | Microchip
MPN: PIC12C671-10I/MF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.66 | $26.60 |
| 100 | $2.36 | $236.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.86 | $1,860.00 |
PIC12C671-10I/MF Overview
A PIC microcontroller (Programmable Interface Controller) is a Harvard-architecture 8-bit MCU family from Microchip Technology that combines a RISC CPU core, non-volatile program memory, RAM, and integrated peripherals such as timers, ADC, and comparators into a single IC. Within the broader embedded hierarchy, PIC MCUs sit under the umbrella of microcontrollers, which themselves belong to integrated circuits and to the semiconductor product family. The PIC12C6xx sub-family is positioned as one of the smallest and lowest-pin-count PIC offerings, optimized for compact, cost-sensitive applications where small PCB area and minimal external component count matter most.
Key specifications for the PIC12C671-10I/MF include 5 digital I/O pins (the remaining pins are dedicated to VDD, VSS, MCLR, and OSC), an internal RC oscillator, an internal Power-on Reset (POR) circuit, a Watchdog Timer (WDT) for code integrity, and an 8-bit ADC with 4 input channels. The device uses the standard mid-range PIC14 instruction set (35 instructions), providing predictable timing and deterministic code execution well suited to real-time control loops.
Architecturally, the PIC12C671 separates program and data buses (Harvard), allowing simultaneous instruction fetch and operand access. The OTP program memory is one-time programmable, meaning each unit is dedicated to a single firmware image - ideal for production runs. Built-in peripherals such as the 8-bit ADC and timer reduce BOM count, and the internal oscillator eliminates the need for an external crystal in many designs, allowing a complete application to be realized with the IC and a few passive components.
Typical applications for the PIC12C671-10I/MF include battery chargers, smart sensors, low-end appliance controllers, personal-care devices, automotive interior lighting modules, and simple closed-loop control subsystems such as fan speed controllers and small DC motor drivers. Designers also deploy the part in edge-of-network IoT sensor nodes where 8-bit processing is sufficient.
When designing with this device, attention should be paid to the OTP memory constraint - firmware must be finalized before production programming, since OTP cannot be reprogrammed in-circuit. Programming is performed via the ICSP interface using tools such as MPLAB PM3. Adequate decoupling and proper layout of the exposed thermal pad to the ground plane will improve ADC noise performance.
This page synthesizes distributor pricing from DigiKey and Mouser, drop-in same-package alternatives from the PIC12C family, and practical design notes that are not found in the standalone manufacturer datasheet.
Drop-in alternatives for PIC12C671-10I/MF — 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 PIC12C671-10I/MF (same form factor and footprint) — differing in RAM Size, Program Memory Size, Package, Operating Temperature, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12C671-04I/MF
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC12C672-10I/MF
✅ Drop-In✓ In Stock
$2.5 / Unit
View Datasheet →PIC12C509A-04I/MF
✅ Drop-In✓ In Stock
$0.99 / Unit
View Datasheet →PIC12C671T-10I/MF
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC12LF1822-I/MF
✅ Drop-In📋 Reference alternative (not in catalog)
PIC12C672-04I/MF
✅ Drop-In✓ In Stock
$3.2 / Unit
View Datasheet →PIC12C671-10I/MF Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit RISC |
| Core Size | 8-bit |
| Program Memory Size | 1.75KB (1K x 14) |
| Program Memory Type | OTP |
| EEPROM Size | Not present |
| RAM Size | 128 x 8 bytes |
| Maximum Clock Frequency | 10MHz |
| Number of I/O Pins | 5 |
| ADC | 4 channels x 8-bit |
| Supply Voltage (Vcc/Vdd) | 3.0V to 5.5V |
| Oscillator Type | Internal |
| Peripherals | POR, WDT |
| Connectivity | ICSP programming |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 8-VDFN Exposed Pad (6x5 mm) |
| Mounting Type | Surface Mount |
| Lead-Free / RoHS | Lead-Free / RoHS Compliant |
PIC12C671-10I/MF Pin Configuration
| Pin 1 | GP3/MCLR/VPP — Digital I/O / Master Clear (reset) / Programming voltage |
| Pin 2 | GP0/ICSPDAT/AN0 — Digital I/O / ICSP data / Analog input 0 |
| Pin 3 | GP1/ICSPCLK/AN1 — Digital I/O / ICSP clock / Analog input 1 |
| Pin 4 | GP2/AN2/COUT/CCP1 — Digital I/O / Analog input 2 / Comparator out / Capture-Compare-PWM |
| Pin 5 | GP4/AN3/T0CKI — Digital I/O / Analog input 3 / Timer0 clock input |
| Pin 6 | GP5/T1CKI/OSC1/CLKIN — Digital I/O / Timer1 clock / Oscillator input (per datasheet alternate function) |
| Pin 7 | VDD — Positive supply voltage (3.0V to 5.5V) |
| Pin 8 | VSS — Ground reference |
Typical Applications
PIC12C671-10I/MF is suitable for 7 applications: Battery-Powered Sensor Node, Small Appliance Control Board, Automotive Interior Lighting Module, Personal Care Device Controller, Smart Sensor Conditioning Front-End, Industrial Fan/Pump Speed Controller, Simple IoT Edge Sensor Node.
Battery-Powered Sensor Node
The PIC12C671-10I/MF fits battery-powered sensor nodes because its integrated 4-channel 8-bit ADC samples analog inputs (temperature, light, voltage) without external signal conditioning, and the 5 I/O pins are sufficient for a sensor plus an interrupt output. Operates from 3.0V-5.5V directly from a 3V coin cell or two AA cells, with the internal RC oscillator eliminating the crystal. Brown-out and POR features protect against low-voltage corruption. Industrial -40C to +85C range suits outdoor enclosures.
Recommended
Small Appliance Control Board
In coffee makers, blenders, or hand-blenders, the PIC12C671-10I/MF drives TRIACs or relays via its 5 I/O pins, reads keypad inputs, and senses temperature through the on-chip ADC. OTP memory ensures the production firmware cannot be tampered with. The 10MHz speed grade handles timing for TRIAC zero-cross switching and PWM motor control loops. The 8-DFN-S (6x5 mm) package fits into tight enclosures where a SOIC-8 would not.
Recommended
Automotive Interior Lighting Module
Ambient LED lighting controllers in automotive cabins use the PIC12C671-10I/MF to PWM-drive LED strings through MOSFETs while monitoring current via the ADC. The industrial -40C to +85C temperature range suits cabin environments, and OTP memory locks the firmware against field tampering. The wide 3.0V-5.5V supply tolerance tolerates automotive battery transients. CAN/LIN is not present; this fits simple single-node lighting modules rather than networked body controllers.
Recommended
Personal Care Device Controller
Electric toothbrushes, shavers, and hair clippers integrate the PIC12C671-10I/MF to control brushed-DC motors via PWM, manage Li-ion battery charging profiles through the ADC, and time drive cycles through the internal oscillator. The 128-byte RAM accommodates small state-machine firmware and the 1.75KB OTP holds the complete charge-profile algorithm. The compact 8-DFN-S footprint fits within the slim housing typical of handheld personal care products.
Recommended
Smart Sensor Conditioning Front-End
The PIC12C671-10I/MF serves as an analog front-end digitizer that reads multiple sensors via its 4-channel 8-bit ADC and outputs the data over a single GPIO as a one-wire protocol. This isolates the main application processor from sensor noise while adding local intelligence. The internal RC oscillator provides deterministic timing for the protocol, and the small 8-DFN-S package allows the sensor module to be mounted close to the transducers for short analog traces.
Recommended
Industrial Fan/Pump Speed Controller
Industrial fans, water pumps, and small blowers use the PIC12C671-10I/MF to read tachometer feedback through one ADC channel, drive a TRIAC or MOSFET through PWM on another I/O, and provide closed-loop speed regulation. The internal RC oscillator eliminates a crystal, reducing BOM cost in cost-sensitive industrial controllers. The industrial -40C to +85C range and wide 3-5.5V supply suit 24V-bus-derived rails and harsh environments.
Recommended
Simple IoT Edge Sensor Node
At the edge of an IoT network, the PIC12C671-10I/MF can be used as a low-cost node that digitizes a sensor reading with the integrated ADC and triggers a wake-up signal to a higher-tier MCU or radio module when a threshold is crossed. The OTP memory keeps node firmware immutable. Combined with an external SPI-controlled radio such as the MRF24J40, the PIC handles sensor acquisition and basic protocol framing at minimal cost and footprint.
Recommended
Recommended Products Summary
Engineering reference data for PIC12C671-10I/MF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12C671-04I/MF | PIC12C672-10I/MF | PIC12C509A-04I/MF | PIC12LF1822-I/MF | PIC12C672-04I/MF |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-VDFN Exposed Pad (6x5 mm) | 8-VDFN Exposed Pad (6x5 mm) - same | 8-VDFN Exposed Pad (6x5 mm) - same | 8-VDFN Exposed Pad (6x5 mm) - same | 8-VDFN Exposed Pad (6x5 mm) - same | 8-VDFN Exposed Pad (6x5 mm) - same |
| Maximum Clock Frequency | 10MHz | 4MHz | 10MHz | 4MHz | 32MHz | 4MHz |
| Program Memory Size | 1.75KB (1K x 14) OTP | 1.75KB OTP | 2KB (1K x 14) OTP | 1.75KB OTP | 3.5KB Flash | 2KB OTP |
| RAM Size | 128 bytes | 128 bytes | 128 bytes | 41 bytes | 128 bytes | 128 bytes |
| ADC | 4 x 8-bit | 4 x 8-bit | 4 x 8-bit | None | 4 x 10-bit | 4 x 8-bit |
| Number of I/O Pins | 5 | 5 | 5 | 5 | 5 | 5 |
| Program Memory Type | OTP | OTP | OTP | OTP | Flash (reprogrammable) | OTP |
| Supply Voltage | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 1.8V to 3.6V | 3.0V to 5.5V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Integrated 4-channel 8-bit ADC in 8-pin package (vs PIC12C509A-04I/MF)
- Higher 10MHz speed grade available (vs PIC12C671-04I/MF)
- In-system reprogrammability with Flash-based successor (vs PIC12LF1822-I/MF)
Design Notes
Estimated: At maximum 10MHz clock, 5.5V supply, and all peripherals active, the PIC12C671-10I/MF core current is in the low single-digit mA range. Place a 100nF decoupling capacitor as close as possible to the VDD pin (pin 7) with a short trace to the VSS pin (pin 8). For ADC accuracy, add a 10uF bulk capacitor on the supply rail if the source impedance is high. The exposed thermal pad must be soldered to a ground plane for thermal dissipation and electrical reference.
OTP (One-Time-Programmable) memory cannot be erased after programming - any code change requires a new device. Verify firmware thoroughly before production programming using MPLAB simulators and the PIC12C671-04I/MF (windowed or extendable development parts) as a development substitute. Also note that GP3 doubles as the MCLR/VPP pin, so designers must choose between using GP3 as a digital I/O or as a hardware reset - it cannot function as both simultaneously on this package variant.
The 8-VDFN Exposed Pad package (6x5 mm) requires proper land pattern design per the Microchip package drawing. The exposed thermal pad must be soldered to a PCB ground pad to provide electrical grounding and thermal dissipation; without proper soldering, the device may overheat or suffer logic errors. Keep analog input traces short and away from digital switching signals to preserve ADC accuracy. Per the Microchip PIC12C671 datasheet, the ICSP programming pins (ICSPCLK/ICSPDAT) share pins with GP1/GP0, so design for accessibility during programming.
Compliance Information
RoHS and lead-free status confirmed per Microchip product page and DigiKey listing. Not AEC-Q100 qualified (industrial grade only). Halogen-free status not explicitly listed in provided data; flagged as 'unknown' rather than assumed.
