PIC12F1822T-I/RF - 8-Bit MCU, 3.5KB Flash, 32MHz, 8-UDFN | Microchip
MPN: PIC12F1822T-I/RF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.28 | $12.80 |
| 100 | $1.1 | $110.00 |
| 500 | $0.95 | $475.00 |
| 1,000 | $0.82 | $820.00 |
| 3,300 | $0.74 | $2,442.00 |
PIC12F1822T-I/RF Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), working memory (RAM), non-volatile data storage (EEPROM), and programmable I/O peripherals. PIC microcontrollers from Microchip use a RISC Harvard architecture with separate program and data buses, providing deterministic single-cycle instruction execution. The 8-bit PIC12F family is positioned for cost-sensitive, space-constrained embedded designs that require low power consumption and minimal pin count, and sits within the broader semiconductor hierarchy of microcontrollers, embedded processors, and integrated circuits.
Key features include nanoWatt XLP technology for ultra-low-power sleep modes (down to sub-microamp quiescent currents), an internal 32MHz high-speed oscillator selectable via configuration bits, an on-board 10-bit ADC with computation, and multiple communication peripherals including EUSART, MSSP (SPI/I2C), and PWM modules. The device also integrates a configurable logic cell (CLC), Complementary Waveform Generator (CWG), and Numerically Controlled Oscillator (NCO) for flexible signal generation without external components.
Typical applications include battery-powered IoT sensor nodes, automotive body and lighting controllers, white-goods user interfaces, low-cost motor control, and consumer remote controls. The 8-UDFN package footprint of 3x3mm is one of the smallest available for PIC MCUs, enabling dense PCB layouts in wearables and space-constrained modules.
When designing with the PIC12F1822T-I/RF, prioritize decoupling capacitor placement near the VDD pin and use the MPLAB X IDE with the XC8 compiler for firmware development. The integrated debug logic via ICSP allows in-circuit programming without a debug header, reducing BOM cost for prototype to production transition. Ensure configuration bits are properly set for the desired oscillator source before code deployment.
Drop-in alternatives for PIC12F1822T-I/RF 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 PIC12F1822T-I/RF (same form factor and footprint) β differing in ADC, Package, Program Memory (Flash), Core Architecture, Maximum CPU Speed.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC12F1822T-I/MF
β Drop-Inβ In Stock
$1.12 / Unit
View Datasheet βPIC12F1822T-E/RF
β Drop-Inπ Reference alternative (not in catalog)
PIC12LF1822T-I/RF
β Drop-Inπ Reference alternative (not in catalog)
PIC12F1822-I/MF
β Drop-Inπ Reference alternative (not in catalog)
PIC12F1572-I/RF
β Drop-Inπ Reference alternative (not in catalog)
PIC12F1501-I/RF
β Drop-Inπ Reference alternative (not in catalog)
PIC12F1571-I/RF
β Drop-Inβ In Stock
$0.72 / Unit
View Datasheet βPIC12F1822T-I/RF Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit Enhanced Mid-Range |
| Program Memory (Flash) | 3.5 KB (2K x 14 words) |
| Data SRAM | 128 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V |
| I/O Pins | 6 |
| Package | 8-UDFN (3x3x0.5 mm) with Exposed Pad |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| ADC | 10-bit, up to 8 channels |
| Timers | 4 (8-bit and 16-bit) |
| Communication | EUSART, MSSP (SPI/I2C) |
| PWM Outputs | Yes (10-bit) |
| AEC-Q100 Automotive Qualified | Yes |
| Low-Power Technology | nanoWatt XLP |
| MSL Level | 1 |
| RoHS Status | Compliant |
PIC12F1822T-I/RF Pin Configuration
| Pin 1 | RA3/ICSPCLK β Bidirectional I/O; also ICSP clock pin |
| Pin 2 | VDD β Positive supply voltage (1.8V to 5.5V) |
| Pin 3 | RA4 β Bidirectional I/O |
| Pin 4 | RA5 β Bidirectional I/O |
| Pin 5 | VSS β Ground reference |
| Pin 6 | RA0 β Bidirectional I/O; analog input capable |
| Pin 7 | RA1/ICSPDAT β Bidirectional I/O; also ICSP data pin |
| Pin 8 | RA2 β Bidirectional I/O; analog input capable |
| Pin 9 | EP β Exposed thermal pad - connect to VSS |
Typical Applications
PIC12F1822T-I/RF is suitable for 6 applications: Automotive Interior Lighting Controller, Battery-Powered IoT Sensor Node, Wearable Fitness Device Controller, White Goods User Interface Module, Low-Cost BLDC Fan Motor Controller, Universal Remote Control Transmitter.
Automotive Interior Lighting Controller
The PIC12F1822T-I/RF is well suited for automotive interior lighting modules such as dome lights, ambient LEDs, and puddle lamps because its AEC-Q100 qualification, -40C to +85C industrial operating range, and 32 MHz Enhanced Mid-Range core provide the deterministic response needed for CAN/LIN-driven lighting commands. The integrated CLC and CWG peripherals generate hardware-driven PWM dimming at up to 10-bit resolution, eliminating the need for external LED-driver ICs in low-channel-count zones. nanoWatt XLP sleep currents below 30 nA allow the module to remain in standby while the vehicle is parked without draining the 12V battery over weeks of inactivity. The 3x3 mm UDFN package fits inside lamp-housing PCBs where space is severely constrained.
Recommended
Battery-Powered IoT Sensor Node
The PIC12F1822T-I/RF excels in coin-cell-powered wireless sensor nodes for IoT applications thanks to its nanoWatt XLP technology delivering typical sleep currents under 30 nA and a 1.8V to 5.5V operating range compatible with two AA alkaline cells or single CR2032 lithium coin cells. The internal 32 MHz oscillator eliminates an external crystal, reducing BOM cost and PCB area. The on-board 10-bit ADC reads temperature, humidity, or analog sensor outputs while the MSSP peripheral handles I2C communication with sensors and the EUSART interfaces to low-cost RF transceivers such as the MRF89XA sub-GHz module. Average current budgets of 5 to 10 uA are routinely achievable for periodic wake-and-transmit cycles, enabling multi-year battery life.
Recommended
Wearable Fitness Device Controller
The PIC12F1822T-I/RF is an ideal main controller for compact wearable devices including fitness bands, smartwatches accessory modules, and heart-rate sensor packs because its 3x3 mm UDFN footprint occupies less than 9 mm squared of PCB area while delivering 32 MIPS of computational throughput. The Enhanced Mid-Range core executes interrupt-driven sensor-fusion algorithms at sub-mA active currents, balancing battery life against real-time response. nanoWatt XLP sleep modes reduce quiescent draw during wrist-down idle periods to nanoampere levels, critical for wearables that spend most of their time in standby. The EUSART and I2C peripherals interface to BLE modules, optical heart-rate sensors, and haptic-feedback drivers without requiring external glue logic.
Recommended
White Goods User Interface Module
White-goods appliances such as washing machines, dishwashers, and microwave ovens use the PIC12F1822T-I/RF as the user-interface MCU driving capacitive touch buttons, rotary encoders, 7-segment LED displays, and buzzer feedback. The integrated CLC and NCO peripherals produce precise touch-scan waveforms and piezo-buzzer tones without external timer ICs, reducing BOM cost. Industrial-grade temperature tolerance allows direct placement behind the front panel where heat from power stages reaches 70C+. The 5.5V maximum VDD tolerates unregulated 5V rails derived from capacitive droppers. MPLAB X IDE compatibility enables rapid firmware iteration across consumer appliance product lines.
Recommended
Low-Cost BLDC Fan Motor Controller
The PIC12F1822T-I/RF is suitable for small brushless DC fan controllers used in consumer cooling, PC case fans, and appliance ventilation because its 10-bit PWM module and Complementary Waveform Generator (CWG) produce the complementary drive signals needed for three-phase sensorless BLDC commutation when combined with external gate drivers. The 32 MHz CPU speed executes sensorless BEMF zero-crossing routines in under 10 us, providing smooth torque and quiet operation across the full speed range. nanoWatt XLP sleep modes drop below 1 uA when the fan is commanded off, satisfying Energy Star standby requirements for household appliances.
Recommended
Universal Remote Control Transmitter
Consumer infrared and RF remote controls use the PIC12F1822T-I/RF as the main controller because of its tiny 8-UDFN package, sub-1 uA sleep current, and integrated CWG that directly drives IR LEDs at 38 kHz carrier frequency without external timers. The 6 I/O pins multiplex a 4x4 keypad matrix using a simple diode scheme while leaving pins for IR output, status LED, and wake-up interrupt. The 32 KB instruction throughput handles complex protocols like NEC, RC5, and SIRC with margin for future protocol additions. Operating voltage down to 1.8V allows the device to function reliably down to the last 10% of alkaline battery capacity.
Recommended
Recommended Products Summary
Engineering reference data for PIC12F1822T-I/RF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12F1822T-I/MF | PIC12F1822T-E/RF | PIC12LF1822T-I/RF | PIC12F1572-I/RF | PIC12F1571-I/RF |
|---|---|---|---|---|---|---|
| Package | 8-UDFN (3x3 mm) | 8-UDFN (3x3 mm) - same | 8-UDFN (3x3 mm) - same | 8-UDFN (3x3 mm) - same | 8-UDFN (3x3 mm) - same | 8-UDFN (3x3 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 1.75 KB |
| Data SRAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Maximum CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| 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 +85 C | -40 C to +85 C |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | Yes | Yes |
| I/O Pins | 6 | 6 | 6 | 6 | 6 | 6 |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 8-bit |
Key Differentiators
- Richest peripheral set in the 8-pin PIC12F family at 3.5KB Flash (vs PIC12F1501-I/RF)
- AEC-Q100 automotive grade with full 5.5V operation (vs PIC12LF1822T-I/RF)
- Industrial temperature range with extended grade alternative (vs PIC12F1571-I/RF)
Design Notes
Place a 0.1 uF decoupling capacitor as close as possible to the VDD pin (pin 2) on the 8-UDFN package, and a bulk capacitor of at least 10 uF on the power-entry node. The PIC12F1822T-I/RF has internal POR (Power-On Reset) and BOR (Brown-Out Reset), but noisy supply rails or high-impedance batteries can trigger spurious resets without adequate decoupling. For battery-operated designs drawing average current below 10 uA, use a 4.7 uF to 10 uF ceramic capacitor on VDD to handle transient current demands during RF transmission or sensor wake events.
The 8-UDFN package has an exposed thermal pad (EP, pin 9) that must be soldered to a PCB land connected to VSS. The EP improves thermal dissipation and provides mechanical board-attach strength. According to Microchip AN-2043 (UDFN PCB layout guidelines), use an array of 5x5 thermal vias under the EP land to conduct heat to the inner ground plane. Without proper EP soldering, junction temperatures can exceed ratings at full CPU load, especially at 32 MHz with all peripherals active.
Configuration bits (CONFIG1, CONFIG2) must be set explicitly before code deployment to select the correct oscillator source, watchdog timer state, code protection, and low-voltage-programming mode. The PIC12F1822T-I/RF defaults to internal oscillator at power-on, but the wrong configuration can lock out ICSP programming. Always verify configuration bits using MPLAB X IDE Configuration Bits window before clicking 'Program'. Also note that RA3 is input-only on PIC12F devices - do not configure it as output in firmware.
When using the MSSP peripheral for SPI or I2C communication at high frequencies (>1 MHz), route the clock and data lines with impedance-controlled traces (typically 50 ohms single-ended) and keep total trace length under 50 mm to avoid ringing. Place 22-100 ohm series termination resistors on clock lines for very short traces between the MCU and nearby peripherals. For long-distance I2C buses (>200 mm), use a buffer IC such as the LTC4311 or PCA9600 instead of relying on internal weak pull-ups alone.
Compliance Information
AEC-Q100 Grade 3 qualified for automotive applications. RoHS and REACH compliant per Microchip product declaration. Lead-free and halogen-free assembly per IPC/JEDEC J-STD-020 MSL1.
