PIC12LF1612-I/SN - 8-Bit 32MHz MCU 3.5KB Flash 8-SOIC | Microchip
MPN: PIC12LF1612-I/SN β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.85 | $0.85 |
| 10 | $0.78 | $7.80 |
| 100 | $0.66 | $66.00 |
| 500 | $0.55 | $275.00 |
| 1,000 | $0.45 | $450.00 |
PIC12LF1612-I/SN Overview
What is an 8-bit microcontroller? An 8-bit microcontroller (MCU) is a small computer-on-a-chip that processes data 8 bits at a time, integrating a CPU, memory (flash/RAM), and peripherals onto a single die. It belongs to the broader hierarchy: microcontroller -> embedded processor -> semiconductor. 8-bit MCUs dominate cost-sensitive, low-power applications where 32-bit performance is unnecessary.
Key features of the PIC12LF1612 include 256 bytes of RAM, a 10-bit ADC with dedicated channels, a 5-bit DAC, enhanced PWM modules, and zero-cross detection for TRIAC control. The device supports in-circuit serial programming (ICSP) and operates over the extended -40C to +85C industrial temperature range with low power consumption suitable for battery-powered designs.
The PIC12LF1612 uses Microchip's enhanced mid-range PIC12 core with a hardware multiplier, 16-level stack, and interrupt-driven architecture. Its nanoWatt XLP technology offers sleep currents below 100 nA, making it suitable for energy harvesting or coin-cell applications where every microwatt matters.
Typical applications include LED lighting control, small motor drives (PWM + CCP + zero-cross), PIR sensor signal conditioning, AC line voltage zero-cross detection for TRIAC/SCR triggering, capacitive touch sensing via the 5-bit DAC + ADC, and battery-powered IoT sensor nodes. The 1.8V minimum VDD also makes it usable in two-AA-cell designs.
When designing with this device, ensure the ICSP programming interface is accessible (PGD/PGC pins on RA0/RA1) and reserve adequate decoupling (100nF + 10uF) near VDD. Watch the absolute maximum VDD of 4.0V; an LDO ahead of the MCU is mandatory when powered from 5V rails.
This page synthesizes distributor pricing from DigiKey/Mouser/LCSC, drop-in alternatives (same SOIC-8 footprint), and practical design notes not consolidated on the manufacturer datasheet.
Drop-in alternatives for PIC12LF1612-I/SN β 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 PIC12LF1612-I/SN (same form factor and footprint) β differing in Package, Timers, ADC, Operating Temperature, Core Architecture.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC12LF1612-I/P
β Drop-Inβ In Stock
$0.58 / Unit
View Datasheet βPIC12LF1612-E/SN
β Drop-Inβ In Stock
$0.48 / Unit
View Datasheet βPIC12F1612-I/SN
β Drop-Inπ Reference alternative (not in catalog)
PIC12F1612-E/SN
β Drop-Inβ In Stock
$0.62 / Unit
View Datasheet βPIC12F1572-I/SN
β Drop-Inπ Reference alternative (not in catalog)
PIC12F1501-I/SN
β Drop-Inπ Reference alternative (not in catalog)
PIC12LF1612-I/SN Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC12 enhanced mid-range 8-bit |
| CPU Speed | 32 MHz |
| Program Memory (Flash) | 3.5 KB (2K x 14 words) |
| RAM | 256 bytes |
| Operating Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 6 |
| ADC | 10-bit, multiple channels |
| DAC | 5-bit |
| PWM Channels | Yes (enhanced PWM) |
| CCP Modules | Yes |
| Zero-Cross Detection | Yes |
| Timers | Multiple 8/16-bit |
| ICSP (In-Circuit Serial Programming) | Yes |
| Package | 8-SOIC (SN) 3.9 mm body |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (industrial) |
| MSL Level | 1 |
| RoHS Status | Compliant |
PIC12LF1612-I/SN Pin Configuration
| Pin 1 | RA3/MCLR/VPP β GPIO RA3 / Master Clear Reset / High-Voltage Programming |
| Pin 2 | RA0/PGD β GPIO RA0 / ICSP Data |
| Pin 3 | RA1/PGC β GPIO RA1 / ICSP Clock |
| Pin 4 | RA2 β GPIO RA2 |
| Pin 5 | VSS β Ground |
| Pin 6 | RA5 β GPIO RA5 |
| Pin 7 | RA4 β GPIO RA4 |
| Pin 8 | VDD β Positive Supply (1.8-3.6 V) |
Typical Applications
PIC12LF1612-I/SN is suitable for 7 applications: LED Lighting Control, AC Mains Zero-Cross Switching, Battery-Powered IoT Sensor Node, Capacitive Touch Sensing, Small Motor Drive (BLDC/PMSM FOC-Lite), PIR Motion Detector Front-End, Industrial Sensor Conditioning.
LED Lighting Control
The PIC12LF1612's enhanced PWM, 10-bit ADC and 5-bit DAC enable high-resolution dimming and color-mixing LED drivers. Its 32 MHz core supports up to 20 kHz PWM frequency without flicker artifacts. The 1.8-3.6 V VDD range suits two-AA-cell retrofits. Place the MCU on the low-voltage secondary side; the 6 I/O pins drive external MOSFET gate drivers for constant-current LED strings.
Recommended
AC Mains Zero-Cross Switching
The PIC12LF1612's integrated Zero-Cross Detection (ZCD) module senses the AC mains zero-crossing point and synchronises TRIAC or SCR triggering for dimmer and solid-state relay circuits. Its 32 MHz core adds enough headroom for line-frequency RMS calculation. Use the 5-bit DAC to bias the ZCD input and the CCP module for pulse-by-pulse phase-angle control with sub-millisecond timing accuracy.
Recommended
Battery-Powered IoT Sensor Node
For coin-cell or 2xAA-powered wireless sensor nodes, the PIC12LF1612's nanoWatt XLP sleep current (<100 nA) and 1.8 V minimum VDD deliver multi-year battery life. The 10-bit ADC reads analog sensors while the CCP wakes the MCU on threshold events. The 256-byte RAM and 3.5 KB flash hold small sensor drivers and a lightweight MAC, with the 32 MHz core bursting awake to transmit before returning to sleep.
Recommended
Capacitive Touch Sensing
The PIC12LF1612's 10-bit ADC combined with the mTouch capacitive sensing library enables reliable touch buttons and sliders with no external touch IC. The 32 MHz core runs the charge-time measurement loop while the 5-bit DAC sets the reference threshold. Its 1.8 V minimum suits sealed battery-powered touch interfaces in white goods and consumer appliances.
Recommended
Small Motor Drive (BLDC/PMSM FOC-Lite)
The PIC12LF1612's CCP and PWM modules generate the complementary 6-step or sensorless-FOC-lite commutation signals for small brushless DC motors. Its 32 MHz MIPS budget handles trapezoidal commutation and RPM measurement via back-EMF on the 10-bit ADC. For fans, micro-pumps, and hand-tool motors under 50 W, the device delivers sufficient performance at lower BOM cost than dedicated motor MCUs.
Recommended
PIR Motion Detector Front-End
The PIC12LF1612's analog front end interfaces directly to PIR sensor elements via the 10-bit ADC and on-chip op-amp configuration. Its low noise floor and nanoWatt XLP modes make it ideal for always-on security sensors running from a CR2032 coin cell. The CCP module generates alarm pulses while the DAC provides the bias reference for the PIR differential amplifier chain.
Recommended
Industrial Sensor Conditioning
In factory automation, the PIC12LF1612 conditions 4-20 mA / 0-10 V analog sensors and outputs PWM or UART signals. Its 10-bit ADC accuracy, 1.8-3.6 V range, and -40 to +85 C industrial grade handle harsh plant environments. The 32 MHz core runs Modbus RTU framing or IO-Link emulation in low-cost remote I/O blocks.
Recommended
Recommended Products Summary
Engineering reference data for PIC12LF1612-I/SN β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12LF1612-I/P | PIC12LF1612-E/SN | PIC12F1612-I/SN | PIC12F1612-E/SN | PIC12F1572-I/SN | PIC12F1501-I/SN |
|---|---|---|---|---|---|---|---|
| Package | 8-SOIC (SN) | 8-PDIP (P) - same pinout, larger | 8-SOIC (SN) - same | 8-SOIC (SN) - same | 8-SOIC (SN) - same | 8-SOIC (SN) - same | 8-SOIC (SN) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Core | 8-bit PIC12 32 MHz | 8-bit PIC12 32 MHz | 8-bit PIC12 32 MHz | 8-bit PIC12 32 MHz | 8-bit PIC12 32 MHz | 8-bit PIC12 32 MHz | 8-bit PIC12 32 MHz |
| Flash Memory | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 1.75 KB |
| RAM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 128 bytes |
| VDD Range | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.5 V to 3.6 V | 2.5 V to 3.6 V | 2.5 V to 3.6 V | 2.5 V to 3.6 V |
| Zero-Cross Detection | Yes | Yes | Yes | Yes | Yes | No | No |
| DAC | 5-bit | 5-bit | 5-bit | 5-bit | 5-bit | No | No |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C |
| Approx 1k Price (USD) | 0.45 | 0.50 | 0.48 | 0.45 | 0.48 | 0.40 | 0.36 |
Key Differentiators
- Lower minimum VDD for 1.8 V designs (vs PIC12F1612-I/SN)
- Integrated Zero-Cross Detection peripheral (vs PIC12F1572-I/SN)
- Industrial temperature grade with full peripheral set (vs PIC12LF1612-E/SN)
Design Notes
Decouple VDD with 100 nF ceramic plus 10 uF bulk as close to pin 8 (VDD) and pin 5 (VSS) as possible. The PIC12LF1612 has no internal bypass and is sensitive to digital-load transients on shared rails. For 1.8 V designs, place a 3.3 V -> 1.8 V LDO (e.g., Microchip MCP1700) ahead of the MCU; do NOT power VDD directly from a 5 V rail, the absolute maximum is 4.0 V.
RA3/MCLR/VPP must be tied to VDD through a 10 kohm resistor for normal operation; do NOT leave it floating. To allow high-voltage ICSP, place a Schottky diode from MCLR to VDD and ensure the trace can tolerate the 12-13 V programming pulse. Keep ICSP traces (PGD/RA0, PGC/RA1) short - under 50 mm - to avoid programming errors at 32 MHz.
Watch the absolute maximum VDD of 4.0 V. Common mistake: routing 5 V USB or unregulated rails to VDD; the device is NOT 5 V tolerant. Also remember the F variants (PIC12F1612) need 2.5 V minimum - a board swap from LF to F on a 1.8 V rail will not boot. Always use the -I suffix for industrial -40 to +85 C, not blank/automotive suffixes.
Place the decoupling capacitors (100 nF + 10 uF) within 3 mm of VDD/VSS pins with vias to a solid ground plane. For Zero-Cross Detection applications, keep the ZCD analog trace away from PWM switching traces and gate-drive signals to avoid false triggering. Use a guard ring around the high-impedance ZCD input pad.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - not intended for automotive safety-critical applications.
