PIC12F1822T-I/MF - 8-bit 32MHz 3.5KB Flash MCU | Microchip
MPN: PIC12F1822T-I/MF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.98 | $1.98 |
| 10 | $1.78 | $17.80 |
| 100 | $1.49 | $149.00 |
| 500 | $1.28 | $640.00 |
| 1,000 | $1.12 | $1,120.00 |
PIC12F1822T-I/MF Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O onto one silicon die. The PIC family falls under the broader hierarchy: 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor. MCUs run firmware stored in non-volatile memory and target deterministic real-time control tasks, in contrast to microprocessors that require external memory and run operating systems. The PIC12 sub-family targets low-pin-count, cost-sensitive, battery-powered designs where smallest PCB footprint and lowest quiescent current are critical.
Key features include an integrated 32 MHz internal oscillator (no external crystal required), 6 I/O pins, four 10-bit ADC channels, two PWM modules, three timers, an Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART), and an MSSP module supporting SPI and I2C. The on-chip debugger and ICSP programming interface eliminate external debug headers on basic designs, and a Peripheral Pin Select (PPS) remaps digital peripherals to any I/O pin.
The PIC12F1822 architecture uses a 14-bit instruction word RISC core with a hardware stack and 32-level deep interrupt priority, enabling deterministic interrupt response. Internal voltage reference, comparators, and a configurable logic cell (CLC) allow analog signal conditioning without external components, while nanoWatt XLP technology provides multiple low-power modes (sleep, dozing, peripheral module disable) for energy harvesting and coin-cell applications.
Typical applications include IoT sensor nodes, battery-powered remote controls, wearable health monitors, LED lighting controllers, low-end motor control (small DC fans and BLDC drivers), white goods user-interface boards, and consumer peripherals. Industrial uses include 4-20 mA loop-powered sensor transmitters, HVAC damper actuators, and small appliance control boards.
When designing with this device, derate the maximum clock frequency linearly below 2.3V to 16 MHz. Place a 0.1 uF decoupling capacitor within 3 mm of VDD and a 10 uF bulk capacitor near the package. Avoid using the ICSP pins as high-current outputs because the in-circuit debugger shares those pads.
This page consolidates distributor pricing, drop-in same-package alternatives, application circuits, and design notes that complement the manufacturer datasheet.
Drop-in alternatives for PIC12F1822T-I/MF 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/MF (same form factor and footprint) β differing in Core Architecture, Timers, ADC, Package, Program Memory (Flash).
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC12F1822-I/MF
β Drop-Inπ Reference alternative (not in catalog)
PIC12F1822-E/MF
β Drop-Inβ In Stock
$0.98 / Unit
View Datasheet βPIC12LF1822T-I/MF
β Drop-Inπ Reference alternative (not in catalog)
PIC12F1840-I/MF
β Drop-Inπ Reference alternative (not in catalog)
PIC12F1822T-I/MF Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC (8-bit RISC, 14-bit instruction word) |
| Program Memory (Flash) | 3.5 KB (2K x 14) |
| Data Memory (SRAM) | 128 B |
| EEPROM | 256 B |
| Maximum CPU Frequency | 32 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V |
| I/O Pins | 6 |
| ADC | 10-bit, 4 channels |
| PWM Modules | 2 (10-bit) |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Communication | EUSART, MSSP (SPI/I2C) |
| Package | 8-pin DFN (3x3 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| Low-Power Technology | nanoWatt XLP |
| Sleep Current | 20 nA typical |
| Internal Oscillator | 32 MHz (Β±1%) |
| RoHS Status | Compliant |
PIC12F1822T-I/MF Pin Configuration
| Pin 1 | RA3/MCLR/VPP β Digital I/O / Master Clear (reset) input / Programming voltage |
| Pin 2 | VDD β Positive supply voltage (1.8V to 5.5V) |
| Pin 3 | RA5 β Digital I/O pin |
| Pin 4 | RA4 β Digital I/O pin (open-drain capable) |
| Pin 5 | RA3 β Digital I/O pin |
| Pin 6 | RA2 β Digital I/O pin |
| Pin 7 | RA1/ICSPCLK β Digital I/O pin / In-Circuit Serial Programming clock |
| Pin 8 | RA0/ICSPDAT β Digital I/O pin / In-Circuit Serial Programming data |
Typical Applications
PIC12F1822T-I/MF is suitable for 6 applications: Battery-Powered IoT Sensor Node, Wearable Health Monitor, LED Lighting Controller, Small DC Fan / BLDC Motor Control, Remote Control / Consumer Peripheral, Industrial Sensor Transmitter.
Battery-Powered IoT Sensor Node
The PIC12F1822T-I/MF is ideal for battery-powered IoT sensor nodes where its 20 nA typical sleep current and 32 MHz internal oscillator eliminate external crystals and minimize quiescent draw. With 3.5 KB Flash and 128 B SRAM, the device runs typical sensor-fusion firmware that wakes on interrupt, samples via the 10-bit ADC, transmits via EUSART or MSSP I2C to a host MCU, then returns to sleep. The 1.8V to 5.5V supply range supports direct connection to single-cell lithium or two AA alkaline cells. PPS (Peripheral Pin Select) remaps EUSART and I2C to any I/O pin, simplifying PCB routing in space-constrained sensor packages where DFN-8 (3x3 mm) footprint is mandatory.
Recommended
Wearable Health Monitor
In wearable health monitors, the PIC12F1822T-I/MF serves as a low-power co-processor that reads heart-rate, SpO2, or temperature sensors and reports data to a Bluetooth host via EUSART. The 6 I/O pins accommodate I2C sensor plus interrupt wake, while the 10-bit ADC is sufficient for low-cost analog front-ends. nanoWatt XLP sleep current of 20 nA means a 3V coin cell (CR2032, 220 mAh) can sustain the device for years between sample intervals. The 8-pin DFN (3x3 mm) package fits inside wristbands and patches where PCB real estate is at a premium, and exposed-pad soldering provides solid thermal coupling to the board copper pour.
Recommended
LED Lighting Controller
The PIC12F1822T-I/MF drives low-to-medium brightness LED lighting via its two 10-bit PWM modules, with the 32 MHz oscillator providing flicker-free PWM at up to 31 kHz. The integrated comparators enable constant-current regulation by sensing a shunt resistor and modulating duty cycle, eliminating the need for a dedicated LED driver IC in cost-sensitive designs. I2C (MSSP) allows digital dimming via standard protocols, and PPS lets designers route PWM outputs to any available I/O pin. The 1.8V to 5.5V range supports both 3.3V logic and 5V analog LED strings in a single part. Operating in industrial temperature -40C to +85C, the device handles outdoor and appliance-lighting environments.
Recommended
Small DC Fan / BLDC Motor Control
For small DC fans and brushless DC (BLDC) motor control, the PIC12F1822T-I/MF provides 6 I/O pins to drive a 3-phase low-side MOSFET bridge with back-EMF sensing, plus PWM generation for speed regulation. The enhanced mid-range 14-bit core and 32 MHz speed deliver the timing precision required for sensorless BLDC commutation. The CLC (Configurable Logic Cell) peripheral implements input blanking and fault masking in hardware, offloading work from the CPU and freeing cycles for the main control loop. With 3.5 KB Flash, the device runs sensorless trapezoidal commutation firmware with UART telemetry on the same silicon.
Recommended
Remote Control / Consumer Peripheral
In handheld remote controls and consumer peripherals, the PIC12F1822T-I/MF runs from a coin cell or two AAA batteries, wakes on a button interrupt, transmits via IR or RF, and returns to 20 nA sleep within microseconds. The 32 MHz internal oscillator enables sub-microsecond timing precision for IR protocols such as NEC and RC5, while 3.5 KB Flash accommodates complex protocol stacks plus user customization. Six I/O pins support 4-8 buttons plus an IR LED driver or RF module enable line. The DFN-8 (3x3 mm) footprint fits inside the smallest remote enclosures where traditional SOIC packages would not.
Recommended
Industrial Sensor Transmitter
For 4-20 mA loop-powered or 2-wire industrial sensor transmitters, the PIC12F1822T-I/MF provides the I/O, ADC, and UART/SPI needed to digitize a sensor and drive a current loop or isolated data link. The 10-bit ADC combined with oversampling in firmware approaches 12-bit effective resolution, adequate for pressure, temperature, and flow measurement. nanoWatt XLP technology allows the device to operate from harvested loop energy with average current draw below 50 uA, supporting HART or WirelessHART modems on the same loop. The -40C to +85C industrial temperature range covers process-control and outdoor sensor installations.
Recommended
Recommended Products Summary
Engineering reference data for PIC12F1822T-I/MF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12F1822-I/MF | PIC12F1822-E/MF | PIC12LF1822T-I/MF | PIC12F1840-I/MF |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-pin DFN (3x3 mm) | 8-pin DFN (3x3 mm) - same | 8-pin DFN (3x3 mm) - same | 8-pin DFN (3x3 mm) - same | 8-pin DFN (3x3 mm) - same |
| Flash Memory | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 7 KB (+100%) |
| SRAM | 128 B | 128 B | 128 B | 128 B | 256 B (+100%) |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz (at 1.8V min) | 32 MHz |
| Operating Voltage Range | 1.8V to 5.5V | 1.8V to 5.5V | 1.8V to 5.5V | 1.8V to 3.6V | 1.8V to 5.5V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Sleep Current (typ) | 20 nA | 20 nA | 20 nA | 20 nA | 30 nA (+50%) |
| Unit Price (qty 1, USD) | $1.98 | $1.98 | $2.15 | $2.05 | $2.20 |
Key Differentiators
- Smallest package footprint in the PIC12F1822 family (vs PIC12F1822-I/SN (8-pin SOIC))
- Tube-format drop-in alternative for low-volume runs (vs PIC12F1822-I/MF (tube))
- Extended temperature option for harsh environments (vs PIC12F1822-E/MF)
- Direct upgrade path with double Flash and SRAM (vs PIC12F1840-I/MF)
Design Notes
The PIC12F1822T-I/MF supports 1.8V to 5.5V operation but derates the maximum CPU frequency linearly below 2.3V - at 1.8V the maximum clock is 16 MHz, not 32 MHz. Plan firmware execution time accordingly for low-voltage battery designs. Place a 0.1 uF decoupling capacitor within 3 mm of the VDD pin and a 4.7-10 uF bulk capacitor on the same supply rail to handle inrush during oscillator startup.
The DFN-8 package has an exposed center pad that must be soldered to a PCB land of at least equal size to the pad itself and thermally tied to the VSS/GND copper pour. Without proper soldering the exposed pad, mechanical reliability and thermal performance degrade significantly. Route VDD and VSS traces as wide as possible (0.3 mm minimum) and keep the exposed-pad land void-free with thermal vias to inner planes for best heat dissipation.
Do not assign the ICSP pins (RA0/ICSPDAT and RA1/ICSPCLK) as high-current outputs in production designs - the in-circuit debugger shares these pads and the additional capacitance can interfere with programming. Use the Peripheral Pin Select (PPS) feature to remap digital peripherals (EUSART, PWM) to non-ICSP I/O pins if those functions are needed on those pads. Estimated: with 6 mA source current per pin and 25 mA total package limit, allocate no more than 4 mA per pin when driving LEDs directly.
When using the MSSP module in I2C mode with fast-mode (400 kHz) or fast-mode-plus (1 MHz), add 2.2-4.7 kohm pull-ups on SDA and SCL and keep trace lengths under 50 mm to avoid ringing. For SPI at 8 MHz or higher, use series damping resistors (22-33 ohm) near the driving pin and ensure VDD decoupling is solid. The 10-bit ADC benefits from a 1 kHz or lower input bandwidth with the internal RC post-ADC filter enabled in firmware for noise-sensitive measurements.
Compliance Information
RoHS and REACH compliant per Microchip product page. Lead-free and halogen-free per Microchip environmental compliance data. AEC-Q100 not qualified - choose PIC12F1822-E/MF (extended grade) for automotive environments where higher temperature range is needed.
