PIC16F18855-I/MV - 8-Bit XLP MCU 14KB Flash 28-UQFN | Microchip
MPN: PIC16F18855-I/MV ✓ Hoạt độngPIC16F18855-I/MV Tóm tắt
A microcontroller is a single-chip computer that combines a CPU core, program and data memory, and a set of peripheral blocks on one silicon die. PIC microcontrollers from Microchip use a Harvard architecture with a RISC instruction set, which keeps the instruction pipeline simple and lets most instructions execute in a single clock cycle. The PIC16F18855 belongs to the mid-range PIC16 family and sits one tier below the enhanced PIC18 line, occupying the same niche as ATmega328P-class parts from Atmel/Microchip AVR. The product type hierarchy is: PIC16F18855 -> 8-bit MCU -> microcontroller -> embedded processor -> integrated circuit. The XLP sub-family specifically targets ultra-low-power, battery-friendly edge nodes, sharing lineage with the PIC16F18854/6/7 and PIC16F18875/6 family members.
Key differentiating features include a 10-bit ADC with computation (ADC2) that automates averaging, threshold comparison and burst-mode sampling, two 10-bit DACs, two comparators with configurable hysteresis, an 8-bit DAC, a 16-bit PWM with complementary outputs and center-aligned mode, four Configurable Logic Cells (CLC), two Zero-Cross Detect (ZCD) modules, and a math accelerator (hardware multiply) for sensor-filter algorithms. Communication peripherals cover EUSART (LIN-capable), I2C and SPI, while two 16-bit timer/counters and three 8-bit timer/counters provide flexible timing. Functional-safety features include an HLT (Hardware Limit Timer) and CRC/SCAN for memory integrity checks, supporting IEC 60730-class appliance-safety designs.
Architecture-wise, the PIC16F18855 uses a 14-bit wide instruction word Flash and a 12-bit standard core with hardware stack, single-cycle branching, interrupt-driven context save, and a 49-instruction RISC set. The XLP implementation includes nanoWatt XLP technology with brown-out-reset variants (BOR), ultra-low-power watchdog timer with dedicated ~32 kHz internal oscillator, and the IDLE/DOZE/SLEEP states. The wide 2.3-5.5 V operating range lets the same firmware run from a single Li-Ion cell, two AAs, or a regulated 5 V rail.
Typical applications include low-power IoT sensor nodes, battery-powered HVAC controls, white-goods and appliance front-panel controllers, LED-lighting controllers with dimming, automotive body controllers (LIN slaves), and small industrial sensor conditioning platforms. The 28-UQFN package suits space-constrained PCBAs such as wearable patches and remote-control PCBs.
When designing, place a 100 nF decoupling capacitor within 2 mm of the VDD pin and use the exposed pad as the thermal and electrical ground return for VSS. The internal 32 MHz HFINTOSC is factory-trimmed and removes the need for an external crystal in most designs, freeing two GPIOs. ICSP programming is multiplexed on the RA and RB ports; reserve these pins or plan a programming-probe friendly layout.
This page consolidates distributor stock, lifecycle status and drop-in family alternatives alongside practical design notes, going beyond the bare datasheet to help embedded engineers select and qualify the part in a single visit.
Bộ thay thế dễ dàng lắp đặt cho PIC16F18855-I/MV — 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 PIC16F18855-I/MV (cùng hình factor và footprint) — khác nhau ở Package, ADC, DAC, Operating Temperature, I/O Pins.
PIC16F18854-I/MV
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Xem tài liệu →PIC16F18857-I/MV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF18855-I/MV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F18856-I/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F18855-I/MV Tỷ lệ tối đa & tính chất điện
| Product Type | 8-bit Microcontroller (MCU) |
| Core | PIC16 / Mid-Range 14-bit Instruction Word |
| Family | PIC16F1885X/7X (XLP, Functional Safety) |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 1 KB |
| Data EEPROM | 256 bytes |
| Maximum CPU Frequency | 32 MHz |
| Operating Voltage (VDD) | 2.3 V to 5.5 V |
| I/O Pins | 25 (maximum, package-dependent) |
| Hộp | 28-pin UQFN (4x4 mm) with exposed pad (MV) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial / 'I') |
| MSL Moisture Sensitivity Level | MSL1 |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
| ADC | 10-bit ADC2 with computation, up to ~25 channels |
| DAC | 2 x 10-bit DAC + 1 x 8-bit DAC |
| Comparators | 2 with configurable hysteresis |
| PWM | 16-bit with complementary outputs, center-aligned mode |
| Communication Peripherals | 1 x EUSART (LIN), 1 x MSSP (I2C/SPI) |
| Timers | 2 x 16-bit + 3 x 8-bit timer/counters |
| Configurable Logic Cells (CLC) | 4 |
| Zero-Cross Detect (ZCD) | 2 modules |
| Functional Safety | HLT, CRC/SCAN, Windowed Watchdog Timer |
| Low-Power Technology | nanoWatt XLP (Sleep currents in nA range) |
Cấu hình chân PIC16F18855-I/MV
| Chân 1 | RA5 — Bidirectional I/O / ADC / DAC5REF+ / CLC / ZCD / ICSP programming |
| Chân 2 | RA4 — Bidirectional I/O / ADC / CLC / ZCD / ICSP programming |
| Chân 3 | RA3 — Bidirectional I/O / VREF+ input / ADC / CLC / ICSP programming |
| Chân 4 | RA2 — Bidirectional I/O / ADC / DAC1 / CLC / ICSP programming |
| Chân 5 | RA1 — Bidirectional I/O / ADC / CLC / ICSP programming |
| Chân 6 | RA0 — Bidirectional I/O / ICSP programming |
| Chân 7 | VSS — Ground reference |
| Chân 8 | RA7 — Bidirectional I/O / OSC1 / CLKIN |
| Chân 9 | RA6 — Bidirectional I/O / OSC2 / CLKOUT |
| Chân 10 | RC0 — Bidirectional I/O / SOSCO / ADC |
| Chân 11 | RC1 — Bidirectional I/O / SOSCI / ADC |
| Chân 12 | RC2 — Bidirectional I/O / ADC / CLC |
| Chân 13 | RC3 — Bidirectional I/O / SCL / SCK / ADC |
| Chân 14 | RC4 — Bidirectional I/O / SDA / SDI / ADC |
| Chân 15 | RC5 — Bidirectional I/O / SDO / ADC |
| Chân 16 | RC6 — Bidirectional I/O / TX / CK / ADC |
| Chân 17 | RC7 — Bidirectional I/O / RX / DT / ADC |
| Chân 18 | RB7 — Bidirectional I/O / ADC / ICSP programming |
| Chân 19 | RB6 — Bidirectional I/O / ADC / ICSP programming |
| Chân 20 | RB5 — Bidirectional I/O / ADC / PWM |
| Chân 21 | RB4 — Bidirectional I/O / ADC / PWM |
| Chân 22 | RB3 — Bidirectional I/O / ADC / PWM |
| Chân 23 | RB2 — Bidirectional I/O / ADC / PWM |
| Chân 24 | RB1 — Bidirectional I/O / ADC / PWM |
| Chân 25 | RB0 — Bidirectional I/O / ADC / PWM / ZCD |
| Chân 26 | VDD — Positive supply voltage (2.3 V to 5.5 V) |
| Chân 27 | VSS — Ground reference |
| Chân 28 | MCLR — Master Clear reset (active-low) / ICSP programming |
Ứng dụng tiêu biểu
PIC16F18855-I/MV phù hợp cho 6 Áp dụngs: Battery-Powered IoT Sensor Nodes, White-Goods and Appliance Front-Panel Controllers, LED Lighting Controllers with Dimming, Automotive LIN Body Controllers, HVAC and Building Automation Sensors, Industrial Sensor Conditioning and Edge Filtering.
Battery-Powered IoT Sensor Nodes
The PIC16F18855-I/MV is purpose-built for battery-driven IoT sensor endpoints where its nanoWatt XLP feature set and sub-microamp deep-sleep currents can stretch a coin cell across months of unattended operation. Its 32 MHz core is enough bandwidth to run sensor conditioning, moving-average filters and a small protocol stack (Modbus-RTU over EUSART, MQTT-SN over SPI) without waking a coprocessor. The integrated 10-bit ADC2 with computation offloads averaging, thresholding and oversampling from the CPU, while the two comparators implement window-detect wake-ups on analogue signals (e.g. a thermistor bridge), enabling event-driven firmware that wakes only on real sensor events. Typical design uses a 3.0 V Li-MnO2 primary cell, the LFINTOSC (~32 kHz) for sleep duty-cycling, and a sub-GHz radio or BLE module on EUSART/SPI - this combination typically yields 1-3 uA average current with hourly transmissions.
Được đề xuất
White-Goods and Appliance Front-Panel Controllers
The PIC16F18855-I/MV is well-suited to washing-machine, dishwasher and oven front-panel controllers where functional-safety compliance (IEC 60730) and a mix of analogue sensing plus AC-line zero-cross switching are required. The on-chip CRC/SCAN, windowed watchdog and HLT (Hardware Limit Timer) directly support Class B firmware validation, reducing external supervisor cost. The two Zero-Cross Detect (ZCD) modules cleanly fire on the AC-line zero crossings to drive triac gates with minimal EMI, while the 16-bit PWM with complementary outputs handles brushless DC or universal-motor speed control. The four Configurable Logic Cells (CLC) implement custom glue logic (fault interlocks, frequency multiplication) without external gates, saving BOM cost. Typical operating point is a 5 V regulated rail, brown-out-reset supervision, and an SPI-controlled OLED or segment display driven from the same MCU.
Được đề xuất
LED Lighting Controllers with Dimming
Commercial LED drivers need precise dimming, colour-temperature mixing and fault detection across long-life fixtures, and the PIC16F18855-I/MV covers this with its 16-bit PWM (centre-aligned, complementary, with dead-band control) plus the four CLC cells for implementing digital filters and inter-channel synchronisation. The two 10-bit DACs provide 0-10 V analogue dimming outputs alongside DALI/0-10 V protocols over EUSART or I2C, while the comparators and ADC monitor LED string current and temperature for foldback and end-of-life protection. The XLP sleep modes let the controller enter microamp quiescent during standby, helping fixtures meet energy-star standby budgets. A typical design pairs the MCU with a buck or PFC front end, a current-sense amplifier, and an isolated gate driver for the switching FET.
Được đề xuất
Automotive LIN Body Controllers
The PIC16F18855-I/MV with its EUSART supporting LIN 2.x, plus CRC/SCAN, windowed watchdog and the AEC-grade (Q) variants in the same family, is a strong fit for automotive body controllers such as door modules, mirror actuators and HVAC flaps. The wide 2.3-5.5 V VDD tolerates 12 V automotive cranking transients via a simple LDO front end, while the 32 MHz core and PWM channels drive small brushed DC motors via FET half-bridges. The 10-bit ADC2 reads position-feedback pots and temperature sensors, and the ZCD modules synchronise PWM to a 50/60 Hz supply reference where needed. Typical LIN slave implementations use the EUSART in LIN mode, a 100 mA-capable LDO, and a TJA1027 LIN transceiver for physical-layer compliance.
Được đề xuất
HVAC and Building Automation Sensors
HVAC and building-automation nodes (room temperature, CO2, occupancy, leakage) need stable analogue performance, low quiescent current and a robust serial interface, all of which the PIC16F18855-I/MV delivers. The ADC2 with computation handles up to 25 channels for multi-sensor boards (temperature, humidity, light, VOC), while the four CLC cells can implement a hardware filter for the CO2 NDIR sensor without burdening the CPU. The MSSP peripheral drives I2C sensors, the EUSART connects to a 4 mA current-loop or RS-485 bus via a small external transceiver, and the XLP sleep currents keep battery- or energy-harvested wireless nodes alive for years. The wide temperature range (-40 to +85 C industrial) covers rooftop and plant-room deployments.
Được đề xuất
Industrial Sensor Conditioning and Edge Filtering
Industrial 4-20 mA loop transmitters and edge filtering nodes need deterministic timing, hardware-accelerated DSP-like functions, and functional-safety diagnostics - all in scope for the PIC16F18855-I/MV. The hardware multiplier (math accelerator) speeds up IIR/FIR sensor-filter loops without loading the core, the CLC cells implement custom timing/pulse-train logic, and the HLT plus CRC/SCAN provide the diagnostic coverage demanded by IEC 61508 SIL-1/2 capable designs. The 16-bit PWM with dead-band generates clean excitation signals for bridge sensors, while the two comparators and ZCDs handle over-current and zero-cross protection on the analogue front end. Typical 4-20 mA designs pair the MCU with an XTR105UA loop transmitter and an isolated DC-DC converter, achieving SIL-2-capable signal chains.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F18855-I/MV — 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 | PIC16F18854-I/MV | PIC16F18856-I/MV | PIC16F18857-I/MV | PIC16LF18855-I/MV |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-UQFN (4x4, MV) | 28-UQFN (4x4, MV) - same | 28-UQFN (4x4, MV) - same | 28-UQFN (4x4, MV) - same | 28-UQFN (4x4, MV) - same |
| Flash | 14 KB | 7 KB | 28 KB | 28 KB | 14 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 2 KB | 1 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| Maximum Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V |
| I/O Pins | 25 | 25 | 25 | 25 | 25 |
| Functional Safety | HLT, CRC/SCAN, WWDT | HLT, CRC/SCAN, WWDT | HLT, CRC/SCAN, WWDT | HLT, CRC/SCAN, WWDT | HLT, CRC/SCAN, WWDT |
| Lifecycle / Stock | Active, in stock | Active, in stock | Active, in stock | Active, in stock | Active, in stock |
Bảo phân biệt quan trọng
- Higher Flash density at same package cost (vsPIC16F18854-I/MV)
- Wider VDD operating range than the LF variant (vsPIC16LF18855-I/MV)
- Built-in functional-safety diagnostics (vsATmega328P (8-bit AVR))
- Hardware math accelerator for sensor DSP (vsPIC16F18854-I/MV)
Ghi chú thiết kế
The PIC16F18855-I/MV integrates nanoWatt XLP technology with sleep currents in the nanoamp range when SLEEP, IDLE and DOZE modes are used with the LFINTOSC. For typical coin-cell sensor nodes: place a 100 nF X7R decoupling cap within 2 mm of the VDD pin (pin 26), connect the exposed pad (EP) to VSS with at least 6 thermal vias, and use the LFINTOSC (~32 kHz) for time-keeping in deep sleep. Wake-up sources should be limited to WDT, IOC, CLC event, or comparator edge to keep average current under 2 uA at one measurement per minute.
The 28-UQFN (4x4 mm) package requires careful pad design - the recommended PCB land pattern is non-cubic to accommodate the 0.4 mm pitch; use NSMD pads with a 0.2 mm solder-mask-defined opening and ensure the EP (exposed pad) is connected to VSS with at least 6 thermal vias (0.3 mm drill) for both electrical reference and thermal dissipation. Trace the MCLR line (pin 28) directly to the programming header with no series resistors; place a 10 kohm pull-up to VDD and a 100 nF cap to VSS as the standard ICSP layout.
Common pitfalls: (1) Do not exceed VDD > 5.5 V - the part has no internal clamping; (2) when migrating from PIC16F1885X to PIC16LF1885X (the 'LF' variant) note the VDD upper limit drops to 3.6 V which can brown-out at 5 V rails; (3) ICSP pins (RA0/RA1/RA2/RA5/RB6/RB7) are multiplexed with general I/O, so a strong pull on these during reset can block programming - use the standard ICSP header; (4) the CLC cells are powerful but their propagation delay adds to interrupt response - budget for 1-2 instruction cycles when using CLC output as an interrupt source.
Keep the analog and digital grounds as a single VSS pour connected only at the EP (single-point star) to avoid ground-loop noise coupling into the ADC. Route the analog reference (VREF+ at RA3) with a guarded trace surrounded by ground; place any external VREF capacitor (typically 100 nF + 10 uF) within 3 mm of the pin. For PWM-driven FET half-bridges, keep the RC5/RC6/RC7 EUSART lines away from switching nodes to avoid injected noise on RX.
Thông tin tuân thủ
RoHS compliant and lead-free per Microchip product page (MV package). Industrial temperature grade -40 to +85 C. AEC-Q100 automotive variants exist in the same family with /MV package - select PIC16F18855-E/MV or PIC16F18855T-I/MV for automotive applications. Conflict-mineral statement available from Microchip corporate compliance.
