PIC12LF1822-E/SN - 8-Bit 32MHz XLP MCU 3.5KB Flash | Microchip
MPN: PIC12LF1822-E/SN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.4 | $1.40 |
| 10 | $1.26 | $12.60 |
| 100 | $1.1 | $110.00 |
| 500 | $0.95 | $475.00 |
| 1,000 | $0.82 | $820.00 |
| 3,000 | $0.72 | $2,160.00 |
PIC12LF1822-E/SN Overview
An 8-bit microcontroller (MCU) is a compact, deterministic computing device that integrates a CPU, memory, and peripherals on a single silicon die, forming the lowest tier of the embedded controller hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. The PIC12 architecture uses a modified Harvard RISC core with a 14-bit instruction word, achieving 200 ns instruction execution at 32 MHz, well-suited for sensor interfacing, control loops, and low-power IoT endpoints.
Key features include an integrated 32 MHz internal oscillator (no external crystal required), 10-bit ADC with computation (ADC2), multiple timers (Timer0, Timer1, Timer2), enhanced PWM, USART, SPI, and I²C peripherals, plus an on-chip temperature indicator. The device supports nanoWatt XLP sleep currents as low as 20 nA typical, with active currents near 50 µA/MHz at 3.3 V, enabling multi-year battery life in remote sensor nodes.
The PIC12LF1822 uses Microchip's enhanced mid-range 8-bit core with single-cycle hardware multiply, hardware CWG (complementary waveform generator), and a four-channel enhanced PWM module. Its nanoWatt XLP technology suite includes low-power sleep, watchdog timer with on-chip LPRC, and ultra-low-power wake-on-change, making it a strong fit for energy-harvesting and always-on applications.
Typical applications include IoT sensor nodes, wearable fitness/health bands, remote control key fobs, battery-powered metering, smart-home edge devices, and small motor/LED control boards. Its 1.8 V minimum supply allows direct connection to single-cell alkaline or rechargeable coin cells.
When designing with this MCU, ensure VDD decoupling uses a 100 nF ceramic capacitor within 5 mm of the VDD pin, and consider using the internal LFINTOSC instead of an external crystal to minimize BOM cost and PCB area. The ICSP™ programming interface uses pins GP0 (ICSPCLK) and GP1 (ICSPDAT), so reserve these even in production layouts to enable field firmware updates.
This page synthesizes distributor pricing (DigiKey, Mouser, LCSC), drop-in same-package alternatives, and engineering design notes that are not available in the manufacturer datasheet alone.
Drop-in alternatives for PIC12LF1822-E/SN — 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-E/SN (same form factor and footprint) — differing in ADC, I/O Pins, Package, Core Architecture, Maximum CPU Speed.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12F1822-I/SN
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →PIC12F1822-E/SN
✅ Drop-In📋 Reference alternative (not in catalog)
PIC12LF1822-I/SN
✅ Drop-In✓ In Stock
$0.79 / Unit
View Datasheet →PIC12F1840-I/SN
✅ Drop-In✓ In Stock
$0.82 / Unit
View Datasheet →PIC12LF1840-E/SN
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →PIC12F1501-E/SN
✅ Drop-In✓ In Stock
$0.58 / Unit
View Datasheet →PIC12LF1822-E/SN Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit enhanced mid-range |
| Program Memory (Flash) | 3.5 KB (2K x 14 words) |
| Data RAM | 128 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz (200 ns instruction cycle) |
| Operating Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 6 (with Peripheral Pin Select) |
| Internal Oscillator | 32 MHz HFINTOSC + 31 kHz LFINTOSC |
| ADC | 10-bit, up to 4 channels with ADC2 (computation) |
| Timers | Timer0, Timer1, Timer2 |
| PWM | Enhanced PWM, up to 4 channels |
| Communication | EUSART (LIN-capable), SPI, I²C (MSSP) |
| Other Peripherals | CWG, NCO, Temperature Indicator, Configurable Logic Cell |
| Sleep Current (XLP) | 20 nA typical (nanoWatt XLP) |
| Active Current | Approx. 50 µA/MHz at 3.3 V (estimated from family data) |
| Package | 8-pin SOIC (SN), 3.90 mm body width |
| Operating Temperature (E suffix) | -40 °C to +125 °C (extended) |
| Programming | ICSP™ (high-voltage and low-voltage) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | MSL1 (per JEDEC J-STD-020) |
PIC12LF1822-E/SN Pin Configuration
| Pin 1 | VDD — Positive power supply input, 1.8 V to 3.6 V |
| Pin 2 | RA5 — Digital I/O / ICSPCLK programming clock / GPIO GP5 |
| Pin 3 | RA4 — Digital I/O / ICSPDAT programming data / GPIO GP4 |
| Pin 4 | RA3 / MCLR / VPP — Digital input / Master Clear (reset) / Programming voltage |
| Pin 5 | RA2 / AN2 — Digital I/O / Analog input 2 / GPIO GP2 (PPS: TX, CWG1FLT) |
| Pin 6 | RA1 / AN1 — Digital I/O / Analog input 1 / GPIO GP1 (PPS: CIN-, ICSPCLK) |
| Pin 7 | RA0 / AN0 — Digital I/O / Analog input 0 / GPIO GP0 (PPS: CIN+, ICSPDAT) |
| Pin 8 | VSS — Ground reference |
Typical Applications
PIC12LF1822-E/SN is suitable for 7 applications: Battery-Powered IoT Sensor Nodes, Wearable Health & Fitness Bands, Remote Control Key Fobs / RF Transmitters, Smart Home Edge Devices, Battery-Powered Metering (Water/Gas/Electric), LED Lighting Control / Drivers, Small DC Motor / Fan Speed Control.
Battery-Powered IoT Sensor Nodes
The PIC12LF1822-E/SN is ideally suited for always-on IoT sensor nodes where multi-year battery life from a single CR2032 or 2×AAA cell is mandatory. Its nanoWatt XLP sleep current of 20 nA typical allows the MCU to spend >99% of its duty cycle asleep while a periodic wake event (WDT or interrupt on change) performs a sensor read and transmits via SPI/I²C. The 1.8 V minimum VDD is below the cutoff of an alkaline cell, capturing usable residual charge. The ADC2 with computation provides hardware averaging for thermistor or gas-sensor signal chains, offloading noise filtering from firmware. Placed as the system controller with a 32.768 kHz external crystal for RTC duty-cycled measurements, it delivers roughly 5-10 years of operation at a 1-10% duty cycle. Use the internal 31 kHz LFINTOSC for ultra-low-power wake intervals to eliminate external timing components entirely.
Recommended
Wearable Health & Fitness Bands
For wearable fitness bands and health-monitoring patches, the PIC12LF1822-E/SN provides the right balance of small size, ultra-low power, and integrated analog peripherals. The MCU operates from 1.8 V-3.6 V, ideal for direct connection to a Li-ion or rechargeable coin cell without an LDO. Its 6 I/O pins (with peripheral pin select) drive multi-color LEDs via hardware PWM, read heart-rate or SpO2 photodiode signals through the 10-bit ADC2, and communicate via I²C to an external accelerometer or BLE module. The 'E' extended temperature range of -40 °C to +125 °C tolerates body-heat rise, ambient temperature swings, and reflow profiles. Pair with a small LIPO charger IC and a coin-cell battery for a multi-day wearable design. Designers use Timer1 with an external 32.768 kHz crystal for real-time clock duty-cycling.
Recommended
Remote Control Key Fobs / RF Transmitters
The PIC12LF1822-E/SN is well-matched to sub-GHz RF key fobs (315/433/868 MHz) where standby life on a CR2032 coin cell is 3-5 years. The MCU sleeps at 20 nA, wakes via an interrupt-on-change on a button press, reads a button matrix, encrypts or rolling-codes the command, and transmits a short OOK/FSK burst via an external SAW-resonator-based transmitter IC. Its 32 MHz internal oscillator eliminates external RF crystals from the MCU side, and the EUSART can drive the TX data line directly. The 1.8 V minimum supply is compatible with depleted-but-still-functional cells (often usable down to 2.0 V). With 6 I/O, designers can support up to 6 buttons plus a status LED without external logic. Place the MCU adjacent to the TX IC with short traces for clean signal integrity.
Recommended
Smart Home Edge Devices
For smart-home edge devices such as door/window sensors, occupancy sensors, and battery-powered push-buttons (used in Zigbee, Z-Wave, or BLE mesh networks), the PIC12LF1822-E/SN delivers deterministic response time and ultra-low standby current. Its 32 MHz CPU executes the radio-stack glue logic and sensor sampling in <2 ms, then returns to deep sleep. The integrated hardware CWG (complementary waveform generator) and NCO (numerically controlled oscillator) allow direct synthesis of 32 kHz clock output for some peripherals. The 1.8 V minimum supply is ideal for direct connection to a single CR2032 cell or a 2×AAA alkaline pack with no LDO. ADC2 with computation performs low-pass filtering on analog sensor channels without firmware overhead. With 6 I/O, it provides button, LED, and sensor interface plus the SPI/UART link to a companion radio SoC.
Recommended
Battery-Powered Metering (Water/Gas/Electric)
The PIC12LF1822-E/SN is widely used in low-end metering and metering-edge modules where its low cost and ultra-low sleep current extend battery life to 10-15 years. The MCU pulses a sensor (e.g. reed switch, Hall-effect sensor, or piezoceramic element) via a GPIO, counts events in Timer0/1, and stores cumulative consumption in the 256-byte EEPROM (rated for >=100K cycles, with wear-leveling via firmware). The 10-bit ADC2 monitors battery voltage to flag low-battery warnings and detects tamper attempts via external switch inputs. The -40 °C to +125 °C extended temperature range tolerates outdoor enclosures in cold winters and hot rooftops. Engineers typically combine the MCU with an external LCD driver or a small LED loop indicator for visual feedback, and an external EEPROM or FRAM for non-volatile event logging.
Recommended
LED Lighting Control / Drivers
For small LED lighting controllers (RGB strips, architectural dimming, grow-lighting sub-modules), the PIC12LF1822-E/SN provides up to 4 enhanced PWM channels plus hardware complement via peripheral pin select, sufficient for a single RGBW channel. The hardware CWG can drive half-bridge MOSFETs without external gate-driver timing logic. The MCU receives commands via UART, SPI, or I²C from a host controller, then runs a local PID loop or scheduled dimming pattern. Its 32 MHz CPU handles high-resolution PWM frequencies (>1 kHz) above the flicker-fusion threshold, eliminating visible flicker in dimmed LED strings. The 1.8 V minimum VDD is well-suited for 3.3 V-only logic rails. The 6 I/O count is sufficient for one RGBW LED channel plus a status indicator and a button input.
Recommended
Small DC Motor / Fan Speed Control
For small DC motor, brushless-fan, or pump speed control, the PIC12LF1822-E/SN integrates a hardware complementary waveform generator (CWG) that drives a half- or full-bridge FET stage with programmable dead-time insertion, eliminating the need for an external gate-driver IC. The enhanced PWM module delivers a 10-bit duty cycle resolution at >20 kHz PWM frequency, well above the audible range. The integrated 10-bit ADC reads back motor current or back-EMF for closed-loop speed control, while Timer1 measures tacho pulses from the motor for RPM feedback. The MCU runs the PID loop at 32 MHz with sub-millisecond update rates. The 1.8 V minimum VDD supports 3.3 V-only logic rails in battery-powered or USB-powered systems. The 'E' extended temperature grade handles the thermal rise inside small enclosures.
Recommended
Recommended Products Summary
Engineering reference data for PIC12LF1822-E/SN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12F1822-I/SN | PIC12F1822-E/SN | PIC12LF1822-I/SN | PIC12F1840-I/SN | PIC12LF1840-E/SN | PIC12F1501-E/SN |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-SOIC (SN) | 8-SOIC (SN) - same | 8-SOIC (SN) - same | 8-SOIC (SN) - same | 8-SOIC (SN) - same | 8-SOIC (SN) - same | 8-SOIC (SN) - same |
| Program Memory (Flash) | 3.5 KB (2K x 14) | 3.5 KB (2K x 14) | 3.5 KB (2K x 14) | 3.5 KB (2K x 14) | 7 KB (4K x 14) | 7 KB (4K x 14) | 1.75 KB (1K x 14) |
| Data RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 256 bytes | 256 bytes | 64 bytes |
| Maximum CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 20 MHz |
| Operating Voltage (VDD) | 1.8 V to 3.6 V (LF) | 1.8 V to 5.5 V (F) | 1.8 V to 5.5 V (F) | 1.8 V to 3.6 V (LF) | 1.8 V to 5.5 V (F) | 1.8 V to 3.6 V (LF) | 1.8 V to 5.5 V (F) |
| Operating Temperature | -40 °C to +125 °C (E) | -40 °C to +85 °C (I) | -40 °C to +125 °C (E) | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) | -40 °C to +125 °C (E) | -40 °C to +125 °C (E) |
| Sleep Current (typical) | 20 nA (XLP) | 20 nA (XLP) | 20 nA (XLP) | 20 nA (XLP) | 30 nA typical (XLP) | 30 nA typical (XLP) | 20 nA (XLP) |
| Unit Price (qty 1) | $1.40 | ~$1.40 | ~$1.40 | ~$1.40 | ~$1.65 | ~$1.65 | ~$0.95 |
Key Differentiators
- Lowest VDD in 8-pin SOIC XLP family at 1.8 V-3.6 V (vs PIC12F1822-I/SN)
- Extended -40 °C to +125 °C operating temperature (vs PIC12LF1822-I/SN)
- Twice the Flash and RAM of the smaller PIC12F1501 (vs PIC12F1501-E/SN)
- Lower power consumption than PIC12F1840 family in deep sleep (vs PIC12F1840-I/SN)
- Peripheral pin select for flexible signal routing (vs PIC12F1501-E/SN)
Design Notes
Place a 100 nF low-ESR ceramic decoupling capacitor within 5 mm of the VDD pin (Pin 1), and add a bulk capacitor (>= 1 µF) at the regulator output. For battery-powered designs, an additional 100 nF at the cell terminal suppresses voltage transients during transmit bursts. The MCU's 20 nA typical sleep current is achievable only when all peripherals are disabled (PMD bits set), WDT disabled, and unused pins configured as outputs driving low. Always use the lowest-power SLEEP mode consistent with wake-up latency requirements.
Reserve pins RA0 (GP0) and RA1 (GP1) on production PCBs even when not used by the application, because these pins double as ICSPDAT and ICSPCLK for in-circuit serial programming. Placing 0 Ω jumpers or test points allows field firmware updates without reworking. The 8-pin SOIC footprint has standard JEDEC land pattern recommendations; ensure pad geometry is 0.65 mm pitch to match the SOIC body. Avoid routing high-speed signals near the ICSP pins to keep programming noise immunity high.
When using the ICSP programming interface on production boards, place a series resistor (typically 10 kΩ) on the MCLR/VPP line to limit inrush current if the pin is also used as a button input. For analog measurements using the ADC2, route analog traces away from digital switching signals, use a separate analog ground if possible, and place the ADC input capacitor as close to the pin as possible. Decouple AVDD (when used as a separate pin in larger MCUs) with a 100 nF + 10 µF combination for clean analog references.
Do not exceed the absolute maximum VDD of 4.0 V on the LF variant (3.6 V recommended maximum). Misconfigured PPS can lock the ICSP pins away from programming mode - always test on a prototype board first. When using the internal 31 kHz LFINTOSC for sleep timing, note its accuracy is only ±5% typical; for time-critical wake intervals use a 32.768 kHz external crystal on Timer1. The 'E' suffix temperature grade (-40 °C to +125 °C) is NOT the same as the 'I' industrial grade (-40 °C to +85 °C); ensure the operating temperature window matches the deployment environment.
Estimated: At full 32 MHz CPU activity with VDD=3.6 V, the MCU's active current is roughly 50 µA/MHz, totaling about 1.6 mA. Power dissipation is therefore P = V × I = 3.6 V × 1.6 mA ≈ 5.8 mW. The 8-pin SOIC package has θJA of approximately 100 °C/W (per Microchip family datasheets), yielding a junction-temperature rise of about 0.6 °C above ambient - well within thermal limits. Sleep power is negligible. No external heatsinking is required.
Compliance Information
RoHS compliant per Microchip product family compliance documentation. Not AEC-Q100 qualified (industrial/consumer grade). For automotive applications contact Microchip for PIC12LF1822 automotive-grade variant selection. Halogen-free per Microchip PIC12 family material declaration.
