PIC16LF18856-I/SS - 32MHz 8-bit XLP MCU 28KB Flash | Microchip
MPN: PIC16LF18856-I/SS ✓ Hoạt độngPIC16LF18856-I/SS Tóm tắt
The PIC16F family sits within the broader hierarchy of 8-bit microcontrollers -> microcontrollers (MCUs) -> microprocessors and controllers -> integrated circuits -> semiconductors. Within Microchip's portfolio, PIC16F/LF devices form the mid-range 8-bit tier between the baseline PIC10/12/16F and the high-performance PIC18F and 16-bit dsPIC families. The LF suffix designates the low-voltage variant that operates from 1.8 V to 3.3 V, while the F variant extends the supply range up to 5.5 V. The "XLP" branding highlights Microchip's nanoWatt XLP technology for sleep currents measured in nanoamps.
Key differentiating features include 25 general-purpose I/O pins, a 10-bit ADC with computation (ADC2), up to five CCP/ECCP modules, two comparators, a DAC, an 8-bit configurable timer/counter with HLT, a CRC/Scan module, and peripheral pin select (PPS) that lets signals be remapped at runtime. The device integrates the CIP ecosystem so functions like signal generation, motor timing, and safety checks can run without CPU intervention, freeing the core for application code and reducing power consumption.
Typical applications include IoT sensor nodes, low-power wireless endpoints, battery-powered medical wearables, consumer appliances, industrial sensing front-ends, and LED lighting controls that benefit from the 25 I/O channels and analog front-end. The wide CIP set (CRC, HLT, Scan, PWM, ADC2) also supports BLDC motor commutation, fan control, and eMetering. Programming is supported through MPLAB X IDE with the XC8 compiler, and debug is enabled by the on-chip ICD over standard two-wire ICSP.
When designing with this part, allocate the budget for the 28-pin SSOP land pattern (5.30 mm body, 0.65 mm pitch) and observe the 1.8 V to 3.6 V supply range. Power decoupling should include 100 nF + 1 uF/10 uF bulk capacitors placed close to VDD/AVDD with a low-impedance ground return. For PIC16F vs PIC16LF behavior in firmware, verify any 5V-only peripheral is replaced with a 3.3V-tolerant counterpart, since the LF device is not 5 V tolerant on its I/O.
Bộ thay thế dễ dàng lắp đặt cho PIC16LF18856-I/SS — 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 PIC16LF18856-I/SS (cùng hình factor và footprint) — khác nhau ở ADC, Package, Operating Temperature, Program Memory (Flash), Core Architecture.
PIC16F18856-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF18855-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF18857-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF18854-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF18856-I/SP
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF18856-I/SS Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16 8-bit RISC |
| Family | PIC16F/LF1885X/7X |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| Data SRAM | 2 KB |
| Data EEPROM | 256 bytes |
| Maximum CPU Clock | 32 MHz |
| Operating Voltage (VDD) | 1.8 V to 3.6 V (LF variant) |
| Number of I/O Pins | 25 |
| ADC | 10-bit, ADC2 with computation |
| Timers | 8-bit TMR0/HLT, 16-bit TMR1/3/5, SMT |
| PWM / CCP | Up to 5 CCP/ECCP modules |
| Comparators | 2 |
| DAC | 5-bit + 8-bit DAC modules |
| Communication | UART, SPI, I2C (with PPS remap) |
| CIP Modules | CRC/SCAN, HLT, CLC, NCO, ZCD |
| Nhiệt độ hoạt động | -40C to +85C (I grade) |
| Hộp | 28-pin SSOP (5.30 mm body, 0.65 mm pitch) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (168 hours) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
| Debug Support | On-chip ICD over 2-wire ICSP |
Cấu hình chân PIC16LF18856-I/SS
| Chân 1 | RA5 — Digital I/O / analog input / DAC output reference |
| Chân 2 | RA4 — Digital I/O / analog input / timer clock input |
| Chân 3 | RA3 — Digital I/O / analog input / reference voltage |
| Chân 4 | RA2 — Digital I/O / analog input / DAC output |
| Chân 5 | RA1 — Digital I/O / analog input / comparator input |
| Chân 6 | RA0 — Digital I/O / analog input |
| Chân 7 | VSS — Ground reference |
| Chân 8 | RA7 — Digital I/O / oscillator output |
| Chân 9 | RA6 — Digital I/O / oscillator input |
| Chân 10 | RC0 — Digital I/O / analog input |
| Chân 11 | RC1 — Digital I/O / analog input |
| Chân 12 | RC2 — Digital I/O / analog input / comparator output |
| Chân 13 | RC3 — Digital I/O / analog input / SPI/I2C clock |
| Chân 14 | RC4 — Digital I/O / analog input / SPI data |
| Chân 15 | RC5 — Digital I/O / analog input |
| Chân 16 | RC6 — Digital I/O / TX/CK |
| Chân 17 | RC7 — Digital I/O / RX/DT |
| Chân 18 | RB7 — Digital I/O / ICSPCLK programming clock |
| Chân 19 | RB6 — Digital I/O / ICSPDAT programming data |
| Chân 20 | RB5 — Digital I/O / analog input |
| Chân 21 | RB4 — Digital I/O / analog input / CCP |
| Chân 22 | RB3 — Digital I/O / analog input / CCP |
| Chân 23 | RB2 — Digital I/O / analog input |
| Chân 24 | RB1 — Digital I/O / analog input / INT |
| Chân 25 | RB0 — Digital I/O / analog input / INT |
| Chân 26 | VSS — Optional ground reference |
| Chân 27 | AVDD — Analog supply (tie to VDD) |
| Chân 28 | MCLR/RE3 — Master clear reset (input) or digital I/O |
Ứng dụng tiêu biểu
PIC16LF18856-I/SS phù hợp cho 6 Áp dụngs: Battery-Powered IoT Sensor Node, Wearable Health Monitor, Industrial Sensor Front-End, HVAC Fan / BLDC Motor Control, Consumer Appliance User Interface, Smart LED Lighting Controller.
Battery-Powered IoT Sensor Node
The PIC16LF18856-I/SS fits battery-powered IoT sensor nodes because its LF 1.8-3.6 V supply range accepts a single Li-ion or two AA cells at end-of-life voltage, while the XLP sleep modes drop current consumption into the nanoamp range between sensor reads. The 25 I/O pins and PPS let the designer route UART/SPI/I2C to any GPIO, simplifying PCB layout when the sensor count changes. CLCs and NCO generate wake-up timing or signal conditioning without CPU wakeups, extending battery life by 2-3x versus polled firmware. A typical 2.4 GHz radio companion (e.g. MRF24XA) sits on the same UART and is powered via the PIC's LDO, while ADC2 samples the sensor at 100 ksps with hardware averaging.
Được đề xuất
Wearable Health Monitor
Wearable health monitors benefit from the PIC16LF18856-I/SS because the LF voltage range supports direct operation from a 1.8 V Li-Po cell, while the 10-bit ADC2 with computation can continuously sample photoplethysmography (PPG) or ECG waveforms with hardware averaging to reduce CPU load. Peripheral Pin Select (PPS) lets the I2C bus route to any GPIO so the PCB can be re-routed to fit wrist-strap geometry. The 2 KB SRAM is enough to buffer heart-rate intervals between BLE transmits, and CLCs/CRC offload safety checks that would otherwise burn active-mode milliseconds. Pairing with a BLE module (RN4871) and a 3-axis accelerometer (LIS3DH) creates a complete low-power biosignal subsystem.
Được đề xuất
Industrial Sensor Front-End
The PIC16LF18856-I/SS is well-suited to industrial 4-20 mA sensor front-ends because the 10-bit ADC2 with computation handles ratio-metric ratiometric measurements against the internal FVR for calibrated readings independent of VDD drift. The wide -40C to +85C industrial temperature range meets factory-floor requirements and the 1.8-3.6 V supply simplifies isolated 3.3 V rails from a digital isolator. CLC and NCO modules generate precise excitation waveforms for LVDT/RTD bridges without CPU intervention, reducing CPU load by 30-50% on typical scan rates. UART, SPI and I2C interfaces feed back to a PLC or industrial Ethernet gateway.
Được đề xuất
HVAC Fan / BLDC Motor Control
HVAC fan and small BLDC motor control are excellent applications for the PIC16LF18856-I/SS thanks to its 5 CCP/ECCP modules that deliver complementary PWM with dead-band generation for 3-phase half-bridge drivers. The peripheral pin select (PPS) keeps the high-current timer pins close to the MOSFET gate drivers on the PCB. CLCs implement hardware commutation trapping so the MCU can wake up only on fault conditions, while the 32 MHz core provides 8 MIPS for sinusoidal commutation tables. Combined with a 3-phase gate driver (MCP8024) this PIC replaces much of the analog control circuitry while staying in a 28-pin SSOP.
Được đề xuất
Consumer Appliance User Interface
Consumer appliance user interfaces benefit from the PIC16LF18856-I/SS because the CIP set (CLC, CRC, Scan) handles touch/proximity sensing, button scanning and capacitive sense without CPU wakeups, freeing the core for UI logic. The 10-bit ADC2 reads thermistor inputs with hardware averaging, while the 5 CCP modules drive LED indicators or RGB status lighting. The LF voltage range lets the appliance run directly from a 3.3 V LDO without a boost converter. Pairing with a segmented LCD driver (e.g. PCF8576) and a piezo buzzer creates a complete, low-cost HMI in a small form factor.
Được đề xuất
Smart LED Lighting Controller
Smart LED lighting controllers map well to the PIC16LF18856-I/SS: the 5 CCP/ECCP modules generate high-resolution PWM for up to 5 LED channels at 32 kHz, eliminating flicker while the LF core keeps quiescent current low for standby-only lighting. The DAC plus DMA-free ADC2 allows closed-loop dimming feedback from a photodiode without waking the CPU. CLCs create glitch-free fade-up/fade-down sequencing and the CRC module validates incoming DMX or DALI frames. The 28 KB Flash fits DMX512, DALI and Casambi-like stack implementations simultaneously, and the wide operating temperature suits downlight enclosures.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LF18856-I/SS — 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 | PIC16F18856-I/SS | PIC16LF18855-I/SS | PIC16LF18857-I/SS | PIC16LF18854-I/SO | PIC16LF18856-I/SP |
|---|---|---|---|---|---|---|
| Package | SSOP-28 (5.30 mm) | SSOP-28 - same | SSOP-28 - same | SSOP-28 - same | SOIC-28 - wider body | SPDIP-28 - through-hole |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 28 KB | 28 KB | 14 KB | 56 KB | 7 KB | 28 KB |
| SRAM | 2 KB | 2 KB | 1 KB | 4 KB | 1 KB | 2 KB |
| Maximum VDD | 3.6 V | 5.5 V | 3.6 V | 3.6 V | 3.6 V | 3.6 V |
| Maximum Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| I/O Pins | 25 | 25 | 25 | 25 | 17 | 25 |
| XLP (NanoWatt) | Yes | Yes | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Larger 28 KB Flash with same SSOP-28 footprint (vsPIC16LF18855-I/SS)
- Wider 1.8 V supply range (vsPIC16LF18346-I/SO)
- 5 V drop-in upward compatibility (vsPIC16F18856-I/SS)
Ghi chú thiết kế
Decouple VDD and AVSS with a 100 nF X7R ceramic placed within 3 mm of the pins and add a 1 uF/10 uF bulk capacitor on the same net. Tie AVDD to VDD with a separate ferrite bead if analog noise is a concern, otherwise short directly. Ensure VDD never exceeds 3.6 V (LF variant) - an over-voltage event at 5 V will damage the part permanently.
The 28-pin SSOP (5.30 mm body, 0.65 mm pitch) requires a clean land pattern with 0.40 mm pad width and 0.65 mm pitch; route signals on inner layers and flood top/bottom with a continuous ground plane. Use 4 mil trace/spacing rules and ensure ICSP signals RB6/RB7 are routed with short stubs to the programming header to maintain debug reliability.
Do not confuse PIC16F18856 with PIC16LF18856 - the F variant supports 5.5 V but the LF is 1.8-3.6 V only. Always configure MCLR (RE3) as a digital input when not used as a reset, otherwise the reset remains asserted. PPS remapping of CCP/PWM requires unlocking the PPSLOCK register sequence; failure to lock after configuration can lead to unreliable operation.
Estimated: with a 4-layer PCB and 2 oz copper top/bottom, theta_JA for the SSOP-28 is around 80-90 C/W. For an industrial grade part this gives roughly 70C ambient headroom for the 250 mW worst-case dissipation, so no heatsink is required for typical application loads.
Thông tin tuân thủ
Industrial temperature grade -40C to +85C; not AEC-Q100 qualified (industrial not automotive). Microchip product page states RoHS and REACH compliance.
