PIC12LF1822-I/P - 8-bit MCU, 3.5KB Flash, 32MHz XLP | Microchip
MPN: PIC12LF1822-I/P ✓ Hoạt độngPIC12LF1822-I/P Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC12LF1822-I/P — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC12LF1822-I/P (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, Internal Oscillator, Operating Temperature, Timers.
PIC12LF1822-E/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC12LF1612-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12LF1501-I/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC12LF1822-I/P Tỷ lệ tối đa & tính chất điện
| 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 |
| Nhiệt độ hoạt động | -40 °C to +85 °C (industrial) |
| Hộp | 8-pin PDIP (P) |
| Programming/Debug | ICSP via PICkit 3 / MPLAB ICD 3 (header AC244044) |
| Trạng thái RoHS | Compliant (PDIP package, lead-free terminal finish) |
Cấu hình chân PIC12LF1822-I/P
| Chân 1 | RA5 — Digital I/O / general-purpose pin |
| Chân 2 | RA4/AN3 — Digital I/O or analog input channel 3 |
| Chân 3 | RA3/MCLR/VPP — Digital input only (MCLR master clear reset, VPP programming voltage) |
| Chân 4 | VSS — Ground reference |
| Chân 5 | RA0/AN0/ICSPDAT — Digital I/O, analog input channel 0, ICSP data line |
| Chân 6 | RA1/AN1/ICSPCLK — Digital I/O, analog input channel 1, ICSP clock line |
| Chân 7 | RA2/AN2 — Digital I/O or analog input channel 2 |
| Chân 8 | VDD — Positive supply voltage (1.8V to 3.6V) |
Ứng dụng tiêu biểu
PIC12LF1822-I/P phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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).
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC12LF1822-I/P — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Larger flash and richer peripheral set than smaller PIC12LF siblings (vsPIC12LF1612-I/P)
- Industrial temperature range at lower cost than the extended-temp variant (vsPIC12LF1822-E/P)
- Wider memory and faster CPU than the value-line PIC12LF1501 (vsPIC12LF1501-I/P)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
