PIC16F18856-I/ML - 28KB Flash 8-bit MCU 32MHz QFN-28 | Microchip
MPN: PIC16F18856-I/ML ✓ Hoạt độngPIC16F18856-I/ML Tóm tắt
A microcontroller (MCU) is a single-chip computer that combines a CPU core, non-volatile program memory (Flash/EEPROM), volatile memory (RAM), peripheral interfaces, and programmable I/O pins on one piece of silicon. Within the embedded compute hierarchy, an 8-bit MCU such as the PIC16F18856 sits below 32-bit MCUs and microprocessors in raw compute capability but well above discrete logic in functional density, making it ideal for cost-sensitive, deterministic, low-power embedded control. It belongs to the PIC16F1885X/7X family that targets general-purpose and low-power designs including IoT end nodes, sensor interfaces, and battery-powered instrumentation.
Key differentiating features include Core Independent Peripherals (CIPs) such as Configurable Logic Cells (CLC), Complementary Waveform Generator (CWG), Numerically Controlled Oscillator (NCO), and a 32-bit CRC/SCAN engine with Hardware Limit Timers (HLT) that together enable functional-safety architectures without software overhead. The device integrates a 10-bit ADC with computation, multiple 5/8/10-bit DACs, and four 8-bit timers, which can eliminate many external analog components. Active clock tuning from a dedicated 32 kHz internal reference improves UART baud-rate accuracy without requiring external crystals.
Architecturally, the PIC16F18856 uses an enhanced mid-range 8-bit PIC core with a 14-bit instruction word and a hardware stack, supported by Microchip's MPLAB X IDE and the MPLAB XC8 compiler. The industrial temperature range of -40C to +85C is suitable for non-automotive ruggedized environments, while pin-compatible migration across the PIC16F1885X/7X family enables memory and peripheral scaling without PCB changes.
Typical applications include low-power IoT sensor nodes, battery-powered medical wearables, automotive body and sensor modules (functional safety), consumer remote controls, and industrial sensor or transmitter designs. For instance, the 50 nA sleep current combined with a 32 MHz active clock makes it well suited to thermostats and wireless sensor endpoints that must run for years on a single cell. When designing with this part, tie the exposed pad (EP) to a continuous ground copper pour for thermal and electrical performance, and use the MPLAB Code Configurator (MCC) to initialize CIPs such as CLC and NCO without writing register-level code. This page synthesizes distributor pricing, drop-in alternatives from the PIC16F18855/4/3/2/7/6 family and cross-brand equivalents, plus practical design notes that go beyond the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16F18856-I/ML — 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 PIC16F18856-I/ML (cùng hình factor và footprint) — khác nhau ở Package, ADC, Program Memory (Flash), DAC, Core Architecture.
PIC16F18876-I/ML
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Xem tài liệu →PIC16F18855-I/ML
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Xem tài liệu →PIC16F18854-I/ML
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Xem tài liệu →PIC16F18857-I/ML
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Xem tài liệu →PIC16F18876-E/ML
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Xem tài liệu →PIC16F18856-I/ML Tỷ lệ tối đa & tính chất điện
| Core | PIC16 enhanced mid-range 8-bit |
| Instruction Set | 8-bit PIC RISC, 14-bit instruction word |
| Program Memory (Flash) | 28 KB (16K x 14) |
| RAM | 2 KB |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz (8 MIPS) |
| Operating Voltage Range | 2.3 V to 5.5 V |
| Sleep Current (XLP) | 50 nA typical |
| ADC | 10-bit with computation |
| DAC | 5/8/10-bit multiple instances |
| Timers | 4 x 8-bit (with CCP) |
| Core Independent Peripherals | CLC, CWG, NCO, CRC/SCAN, HLT |
| Functional Safety (FuSa) | Yes (CRC/SCAN + HLT) |
| Hộp | 28-pin QFN (6x6 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Programming/Debug | ICSP + ICD |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16F18856-I/ML
| Chân 1 | RA5 — Bidirectional I/O / ADC input |
| Chân 2 | RA4 — Bidirectional I/O |
| Chân 3 | RA3 — Bidirectional I/O / external interrupt |
| Chân 4 | RA2 — Bidirectional I/O / DAC output |
| Chân 5 | RA1 — Bidirectional I/O / DAC reference |
| Chân 6 | RA0 — Bidirectional I/O / ICSPDAT |
| Chân 7 | VSS — Ground reference |
| Chân 8 | RA7 — Bidirectional I/O / oscillator |
| Chân 9 | RA6 — Bidirectional I/O / oscillator |
| Chân 10 | RC0 — Bidirectional I/O |
| Chân 11 | RC1 — Bidirectional I/O |
| Chân 12 | RC2 — Bidirectional I/O |
| Chân 13 | RC3 — Bidirectional I/O / SCL |
| Chân 14 | RC4 — Bidirectional I/O / SDA |
| Chân 15 | RC5 — Bidirectional I/O |
| Chân 16 | RC6 — Bidirectional I/O / TX |
| Chân 17 | RC7 — Bidirectional I/O / RX |
| Chân 18 | VSS — Ground reference |
| Chân 19 | RB7 — Bidirectional I/O / ICSPCLK |
| Chân 20 | RB6 — Bidirectional I/O / PGM |
| Chân 21 | RB5 — Bidirectional I/O / AN11 |
| Chân 22 | RB4 — Bidirectional I/O / AN10 |
| Chân 23 | RB3 — Bidirectional I/O / AN9 |
| Chân 24 | RB2 — Bidirectional I/O / AN8 |
| Chân 25 | RB1 — Bidirectional I/O / AN7 |
| Chân 26 | RB0 — Bidirectional I/O / interrupt-on-change |
| Chân 27 | VDD — Positive supply 2.3-5.5 V |
| Chân 28 | VDD — Positive supply 2.3-5.5 V |
Ứng dụng tiêu biểu
PIC16F18856-I/ML phù hợp cho 6 Áp dụngs: Battery-Powered IoT Sensor Node, Functional-Safety Sensor Module (Automotive Body), Industrial Sensor and Transmitter, Medical Wearable Health Monitor, Consumer Remote Control and HMI, Smart Thermostat and HVAC Controller.
Battery-Powered IoT Sensor Node
The PIC16F18856-I/ML suits battery-powered IoT sensor nodes where sleep current dominates total energy budget. With 50 nA typical sleep current via XLP and a 32 MHz active mode that completes a sensor read in microseconds, the device can sleep for 99.9% of a measurement interval while still waking periodically via the Windowed Watchdog Timer. The 28 KB Flash holds IEEE 802.15.4 or BLE stack fragments plus sensor calibration tables, while the 256-byte EEPROM stores non-volatile network keys. CRC/SCAN plus HLT CIPs add functional-safety diagnostics without burning CPU cycles, making the part well suited to remote sensor endpoints that must run for years on a single coin cell.
Được đề xuất
Functional-Safety Sensor Module (Automotive Body)
The PIC16F18856-I/ML is positioned for automotive body and sensor modules requiring functional-safety support. Its 32-bit CRC/SCAN engine continuously verifies program flow and peripheral integrity, while Hardware Limit Timers (HLT) enforce watchdog windows in hardware, eliminating software overhead. The CLC, CWG, and NCO CIPs implement sensor signal conditioning, complementary PWM, and precise frequency synthesis without loading the core. With 28 KB Flash capable of holding an IEC 60730 safety library plus application code, and operation across -40C to +85C, the device supports body-control, lighting, and proximity-sensing modules that must detect faults autonomously.
Được đề xuất
Industrial Sensor and Transmitter
For industrial 4-20 mA loop-powered transmitters and process sensors, the PIC16F18856-I/ML combines a 10-bit ADC with computation, hardware averaging, and a 32 MHz core to deliver accurate conversion at low duty cycle. The 2.3-5.5 V operating range supports direct connection to loop-powered rails with a low-Iq LDO front-end. Core Independent Peripherals like CLC and NCO generate precise excitation frequencies for RTD or bridge sensors without CPU intervention. The 50 nA sleep current plus 32 MHz wake-up enables >10-year battery life on wireless HART or IO-Link Wireless sensor endpoints.
Được đề xuất
Medical Wearable Health Monitor
Medical wearables such as continuous glucose monitors, pulse oximeters, and wearable ECG patches benefit from the PIC16F18856-I/ML's XLP sleep current of 50 nA and active 32 MHz throughput. The 10-bit ADC with computation performs on-chip oversampling and averaging for heart-rate or SpO2 front-ends, while CLC and NCO generate stimulus frequencies for optical sensors. The 2 KB RAM buffers samples between BLE transmissions, and 256-byte EEPROM stores patient-specific calibration. Industrial -40C to +85C temperature range supports body-worn operation across climates.
Được đề xuất
Consumer Remote Control and HMI
The PIC16F18856-I/ML is well suited to consumer remote controls, smart-home keypads, and small HMI panels that demand low standby drain and responsive wake-up. The CWG peripheral drives IR or RGB LED PWM directly from hardware, while the CLC implements custom debouncing and gesture logic without firmware overhead. The 28 KB Flash holds rich UI state machines and IR protocol libraries (RC5, RC6, SIRC, NEC), and the 2 KB RAM buffers touch or keypad scans. The QFN-28 footprint plus 50 nA sleep allows multi-year battery life on two AAA cells.
Được đề xuất
Smart Thermostat and HVAC Controller
Smart thermostats and HVAC zone controllers benefit from the PIC16F18856-I/ML's combination of low-power operation, precise analog peripherals, and a generous 28 KB code space. The 10-bit ADC with computation reads NTC thermistors and humidity sensors with on-chip averaging, while multiple 5/8/10-bit DACs drive triacs or 0-10 V lighting dimmers. CWG outputs complementary PWM for synchronous rectifier or triac drive, and CRC/SCAN monitors program integrity for safety-critical relay control. With 50 nA sleep, the device spends most of its life in deep sleep between user interactions, extending battery backup to multi-year durations.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F18856-I/ML — 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 | PIC16F18876-I/ML | PIC16F18855-I/ML | PIC16F18854-I/ML | PIC16F18857-I/ML | PIC16F18876-E/ML |
|---|---|---|---|---|---|---|
| Package | QFN-28 (6x6 mm) | QFN-28 (6x6 mm) - same | QFN-28 (6x6 mm) - same | QFN-28 (6x6 mm) - same | QFN-28 (6x6 mm) - same | QFN-28 (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 28 KB | 56 KB | 14 KB | 7 KB | 56 KB | 56 KB |
| RAM | 2 KB | 4 KB | 1 KB | 1 KB | 4 KB | 4 KB |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Maximum Clock | 32 MHz | 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 | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| Temperature Range | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +125C (extended) |
| Functional Safety (FuSa) | Yes (CRC/SCAN + HLT) | Yes (CRC/SCAN + HLT) | Yes (CRC/SCAN + HLT) | Yes (CRC/SCAN + HLT) | Yes (CRC/SCAN + HLT) | Yes (CRC/SCAN + HLT) |
| Approx. Unit Price (USD, qty 1) | 2.85 | 3.40 | 2.50 | 2.30 | 3.50 | 3.65 |
Bảo phân biệt quan trọng
- Larger Flash and RAM than PIC16F18855 with same peripherals (vsPIC16F18855-I/ML)
- Functional-safety (FuSa) CIP set including CRC/SCAN and HLT (vsPIC16F18854-I/ML)
- 50 nA XLP sleep current at full industrial temperature (vsPIC16F18876-E/ML)
Ghi chú thiết kế
The 28-pin QFN (6x6 mm) package on the PIC16F18856-I/ML exposes a thermal pad (EP) on the underside that MUST be soldered to a continuous ground copper pour for both electrical and thermal performance. Without EP soldering the die dissipates heat only through the perimeter pins, leading to 30-40% higher theta_JA and potential thermal shutdown at sustained 32 MHz operation. Recommended: at least 100 mm^2 of 1 oz copper on the top layer tied directly to the EP and stitched with thermal vias to the inner ground plane.
Place the 0.1 uF VDD decoupling capacitor within 3 mm of pins 27 and 28, with a wider trace and multiple vias to the ground plane to minimize supply noise on the analog ADC readings. For sleep-current-sensitive designs, gate the pull-ups on unused I/O to avoid leakage paths; the XLP datasheet specifies maximum 50 nA sleep only when unused pins are configured as outputs low or inputs without pull-ups. A 10 uF bulk capacitor on VDD plus the local 0.1 uF is recommended for hot-plug and inrush scenarios.
Do not enable the ADC and reference simultaneously without a settling delay; the 10-bit ADC with computation requires the reference to be stable for at least 5 us before conversion start to avoid gain error. When migrating code from PIC16F18855 to PIC16F18856, the configuration words for oscillator and watchdog differ in flash address; verify with MPLAB X that __CONFIG bits match the new device datasheet. Finally, ICSP programming pins RA0 and RB7 must not be pulled low at reset or the device will enter programming mode instead of normal execution.
When using the CWG or NCO peripherals to drive external PWM or frequency outputs, route the output tracks with a 50 ohm characteristic impedance and keep traces shorter than 1/10 of the wavelength at the highest harmonic. For the 32 MHz Fosc, the third harmonic sits at 96 MHz with a wavelength around 3 m, so traces up to 30 cm are usually safe, but tightly coupled adjacent traces may pick up cross-talk. Place a small ferrite bead in series with noise-sensitive analog inputs near the connector to suppress conducted emissions from CWG switching edges.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified; choose PIC16F18856-E/ML (extended temp) or a Q100-grade sibling for automotive. Industrial -40C to +85C temperature range.
