PIC12LF1822-I/P - 8-bit MCU, 3.5KB Flash, 32MHz XLP | Microchip
MPN: PIC12LF1822-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.49 | $1.49 |
| 10 | $1.39 | $13.90 |
| 100 | $1.18 | $118.00 |
| 500 | $1.05 | $525.00 |
| 1,000 | $0.95 | $950.00 |
PIC12LF1822-I/P Overview
An 8-bit microcontroller (MCU) is a small computer on a single integrated circuit containing a CPU, RAM, non-volatile program memory, and I/O peripherals, designed for embedded control tasks. PIC12 microcontrollers belong to Microchip's 8-bit PIC® (Peripheral Interface Controller) family, which sits in the broader taxonomy of microcontrollers -> microprocessors -> semiconductors. Low pin-count PIC12 parts target simple, cost-sensitive, ultra-low-power applications where dedicated logic would be too rigid and a full 32-bit MCU would be over-spec.
Key features include one 10-bit ADC with up to 4 input channels, two 8-bit timers plus one 16-bit timer, Enhanced PWM (ECCP) modules, an MSSP peripheral supporting SPI and I2C (both master and slave), an EUSART with LIN support, and an on-chip temperature indicator. The LF silicon supports 1.8V–3.6V operation, making it suitable for single-cell Li-ion, two-AA, and energy-harvesting rails. The part carries an industrial temperature rating of -40 °C to +85 °C.
Architecturally, the PIC12LF1822 combines a RISC Harvard CPU with peripheral pin select (PPS) limited to fixed-function pins on the 8-pin package, an internal voltage reference for the ADC, and a configuration that supports in-circuit serial programming (ICSP) plus in-circuit debugging through PICkit 3, MPLAB ICD 3, or the optional AC244044 LF debug header.
Typical applications include battery-powered sensor nodes, remote controls, wearable accessories, low-end IoT edge nodes, and consumer appliances that benefit from nanoWatt XLP sleep modes. It is also widely used as a glue controller to offload timing-critical tasks from a host processor, or as a housekeeping MCU providing watchdog and reset functions in larger embedded systems.
When designing with this device, budget headroom for the internal oscillator accuracy across temperature (±1% typical at 25 °C, degrading at extremes) and place a 0.1 µF decoupling capacitor close to VDD. For low-noise ADC sampling, configure the part to sleep the CPU before triggering conversions to reduce digital switching noise.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet, supporting faster sourcing and design-in decisions for the PIC12LF1822-I/P.
Drop-in alternatives for PIC12LF1822-I/P — 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 PIC12LF1822-I/P (same form factor and footprint) — differing in Core Architecture, Internal Oscillator, Timers, ADC, Maximum CPU Frequency.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12LF1822-E/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.84 / Unit
View Datasheet →PIC12LF1612-I/P
✅ Drop-In✓ In Stock
$0.58 / Unit
View Datasheet →PIC12LF1501-I/P
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC12LF1822-I/P Maximum Ratings & Electrical Characteristics
| Core Architecture | Enhanced Mid-Range 8-bit PIC (Harvard RISC) |
| Maximum CPU Frequency | 32 MHz (200 ns instruction cycle) |
| Program Memory (Flash) | 3.5 KB (2K x 14 words) |
| Data SRAM | 128 bytes |
| Data EEPROM | 256 bytes |
| I/O Pins | 6 |
| ADC | 10-bit, up to 4 channels |
| Timers | 2 x 8-bit, 1 x 16-bit |
| PWM | ECCP Enhanced PWM module(s) |
| Communication Peripherals | 1 x MSSP (SPI/I2C), 1 x EUSART (LIN-capable) |
| Operating Voltage (VDD) | 1.8 V to 3.6 V (LF silicon, industrial temp) |
| Internal Oscillator | 32 MHz, factory calibrated |
| Low-Power Technology | nanoWatt XLP, ~20 nA sleep current |
| Operating Temperature | -40 °C to +85 °C (industrial) |
| Package | 8-pin PDIP (P) |
| Programming/Debug | ICSP via PICkit 3 / MPLAB ICD 3 (header AC244044) |
| RoHS Status | Compliant (PDIP package, lead-free terminal finish) |
PIC12LF1822-I/P Pin Configuration
| Pin 1 | RA5 — Digital I/O / general-purpose pin |
| Pin 2 | RA4/AN3 — Digital I/O or analog input channel 3 |
| Pin 3 | RA3/MCLR/VPP — Digital input only (MCLR master clear reset, VPP programming voltage) |
| Pin 4 | VSS — Ground reference |
| Pin 5 | RA0/AN0/ICSPDAT — Digital I/O, analog input channel 0, ICSP data line |
| Pin 6 | RA1/AN1/ICSPCLK — Digital I/O, analog input channel 1, ICSP clock line |
| Pin 7 | RA2/AN2 — Digital I/O or analog input channel 2 |
| Pin 8 | VDD — Positive supply voltage (1.8V to 3.6V) |
Typical Applications
PIC12LF1822-I/P is suitable for 6 applications: Battery-Powered Sensor Node, Remote Control Transmitter, Wearable Health Monitor, Industrial Housekeeping MCU, Consumer Appliance User Interface, Low-End IoT Edge Node.
Battery-Powered Sensor Node
The PIC12LF1822-I/P fits battery-powered sensor nodes because its nanoWatt XLP sleep current (~20 nA with WDT off, per Microchip datasheet 40001413F) and 1.8V-3.6V operation match single-cell Li-ion or 2xAA chemistries with minimal quiescent drain. In a typical 3.3V coin-cell design, the MCU wakes periodically to read the ADC (10-bit, 4 channels), transmits via the EUSART or MSSP I2C interface, and returns to sleep, achieving multi-year battery life. The integrated 32 MHz internal oscillator eliminates an external crystal, reducing BOM cost and PCB area.
Recommended
Remote Control Transmitter
The PIC12LF1822-I/P is well suited for handheld remote controls thanks to its 6 I/O pins (enough for 4-6 button rows/columns), on-chip PWM/ECCP for IR carrier generation, and nanoWatt XLP sleep that keeps idle current negligible. The integrated 32 MHz internal oscillator provides accurate IR carrier frequencies (commonly 38/40 kHz) without an external resonator. The 1.8V-3.6V range pairs cleanly with two AAA cells, and the 10-bit ADC can read battery voltage for low-battery indication.
Recommended
Wearable Health Monitor
The PIC12LF1822-I/P suits compact wearable designs because its 8-pin PDIP or 8-pin SOIC package occupies less than 30 mm², and its 20 nA sleep current preserves tiny coin-cell batteries for months. The internal temperature-indicator ADC channel can measure die temperature for basic health metrics or thermal compensation, while the EUSART or MSSP I2C bus streams data to a Bluetooth module. The 1.8V-3.6V VDD range matches the typical CR2032 discharge curve, eliminating the need for a boost converter.
Recommended
Industrial Housekeeping MCU
The PIC12LF1822-I/P works well as a housekeeping/watchdog MCU on industrial controller boards, monitoring supply rails with its 10-bit ADC, generating system resets, and providing low-speed I2C glue logic. Its 32 MHz CPU executes background tasks in real time while leaving the host processor free for primary control. The -40C to +85C industrial temperature grade covers most factory-floor enclosures, and the 8-pin PDIP simplifies through-hole rework and prototyping. Programming over ICSP allows field firmware updates without removing the part.
Recommended
Consumer Appliance User Interface
The PIC12LF1822-I/P can drive simple user interfaces in consumer appliances - a few buttons, a buzzer, and 2-3 status LEDs - because its 6 I/O pins cover the basic interaction set and the ECCP PWM module can produce tones on a piezo buzzer. The 1.8V-3.6V VDD range lets it share a 3.3V regulator with the main appliance controller, while the EUSART links to the main board for status reporting. The XLP sleep mode drops standby power below regulatory standby limits (often <0.5 W).
Recommended
Low-End IoT Edge Node
The PIC12LF1822-I/P suits simple IoT edge nodes that wake from a sensor, pre-process data (averaging, thresholding), and forward only meaningful events to a host or radio module via I2C/SPI. Its nanoWatt XLP technology lets the node sleep at ~20 nA between events, while its 32 MHz speed handles signal-conditioning algorithms on demand. The 8-pin PDIP package is breadboard-friendly for prototyping, and the AC244044 debug header enables on-board MPLAB ICD debugging without reworking the PCB.
Recommended
Recommended Products Summary
Engineering reference data for PIC12LF1822-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12LF1822-E/P | PIC12LF1612-I/P | PIC12LF1501-I/P |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-8 (P) | PDIP-8 (P) - same | PDIP-8 (P) - same | PDIP-8 (P) - same |
| Operating Voltage (VDD) | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 20 MHz |
| Flash Memory | 3.5 KB | 3.5 KB | 1.75 KB | 1 KB |
| SRAM | 128 bytes | 128 bytes | 128 bytes | 64 bytes |
| EEPROM | 256 bytes | 256 bytes | 0 bytes (none) | 0 bytes (none) |
| I/O Pins | 6 | 6 | 6 | 6 |
| Temperature Range | -40C to +85C (industrial) | -40C to +125C (extended) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| Approx. Unit Price (qty 100) | USD 1.18 | USD ~1.25 (small premium) | USD ~1.10 | USD ~0.95 |
Key Differentiators
- Larger flash and richer peripheral set than smaller PIC12LF siblings (vs PIC12LF1612-I/P)
- Industrial temperature range at lower cost than the extended-temp variant (vs PIC12LF1822-E/P)
- Wider memory and faster CPU than the value-line PIC12LF1501 (vs PIC12LF1501-I/P)
Design Notes
Estimated: at 32 MHz active current is about 50 µA/MHz (3.3V supply), so peak active draw is roughly 1.6 mA plus any pin source/sink current. Place a 0.1 µF decoupling capacitor within 5 mm of VDD (pin 8) and a 10 µF bulk capacitor at the regulator output to suppress dips during ADC sampling or RF transmission bursts. For deep-sleep designs, route MCLR through a 10 kΩ pull-up to VDD to keep reset current negligible.
Keep the analog input traces (RA0-RA2, RA4) short and away from switching nodes such as PWM outputs and the EUSART TX line. Connect VSS (pin 4) directly to the ground pour with a via close to the pin. For ICSP debugging, expose the RA0/ICSPDAT, RA1/ICSPCLK and MCLR/VPP pins on the PCB as a 3-pin header or test points; Microchip recommends the AC244044 external debug header for LF silicon instead of the on-chip debug.
RA3 (pin 3) is INPUT-ONLY - never drive it as an output, or you risk damaging the part. The MCLR function shares this pin; if MCLR is disabled in configuration, RA3 still cannot be driven high by external logic without internal pull-up. Also, do not exceed 3.6 V on VDD even briefly - the LF silicon lacks 5 V tolerance. If a 5 V rail is present on the board, use a 3.3V LDO (e.g. MCP1700) or choose the PIC12F1822 (F) variant instead.
For accurate ADC readings, sleep the CPU immediately before triggering a conversion and use the dedicated FRC or internal reference; the CPU switching noise couples onto VDD and degrades ADC SNR otherwise. The internal 1.024 V bandgap reference is stable enough for ratiometric measurements but is not calibrated for absolute voltage accuracy - calibrate against a known rail if precise measurements are needed.
When using the 32 MHz internal oscillator across the industrial -40C to +85C range, the frequency tolerance degrades from ±1% (typ at 25C) to ±2% at temperature extremes. If your design needs tight UART baud rates over temperature, calibrate against a known reference (e.g. capture the LF 31 kHz against mains frequency), or switch to an external crystal on RA4/RA5.
Compliance Information
RoHS compliance for PDIP lead-free terminal finish confirmed on Microchip product page. AEC-Q100 not qualified; for automotive use consider PIC12F1822-E/P automotive variants or dedicated AEC-Q100 parts. Halogen-free status not stated in the verified data.
