PIC16F18856-I/SS - 8-Bit 32MHz 28KB Flash MCU 28-SSOP | Microchip
MPN： PIC16F18856-I/SS ✓ 啟用中PIC16F18856-I/SS 概覽
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data-path CPU, optimized for deterministic real-time control and ultra-low-power operation. PIC microcontrollers sit in the broader hierarchy of microcontrollers -> microprocessors -> semiconductors -> integrated circuits, and the PIC16 mid-range family targets general-purpose and low-power embedded applications across industrial, consumer, and automotive markets.
Key features include core-independent peripherals (CIPs), a 10-bit ADC with computation (averaging, oversampling, threshold detection), multiple EUSARTs, I²C, capture/compare/PWM modules, peripheral pin select (PPS) for flexible I/O mapping, a CRC/SCAN hardware block for memory integrity, zero-cross detection on dedicated pins, a 5-bit DAC, multiple comparators, and configurable logic cells. XLP technology delivers sleep currents in the nanoamp range, extending battery life in always-on sensor nodes.
The architecture pairs a RISC-based 8-bit CPU with a 14-bit instruction word and hardware multiply assist, achieving throughput near 1 MIPS/MHz. The ADC-with-compute engine performs averaging, oversampling, and threshold comparisons in hardware, offloading the CPU and reducing firmware complexity in sensor-interface designs. PPS remaps digital peripherals to almost any I/O, simplifying PCB routing when compared with fixed-pin MCUs.
Typical applications include IoT sensor nodes, battery-powered portable instruments, industrial control and sensor conditioning, home appliances, low-power wireless motor control, functional safety subsystems (Class B / IEC 60730), and general-purpose embedded control with safety monitoring requirements.
When designing with this MCU, use the MPLAB X IDE with the XC8 compiler and leverage the peripheral pin select to route digital functions to nearly any I/O pin. Select the LF variant (PIC16LF18856) when the system runs from 3.3V or below to retain full speed at lower Vdd; add a 0.1µF + 10µF decoupling pair adjacent to Vdd to keep ADC readings stable.
This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes beyond what is found in the manufacturer datasheet.
直接替換替代品，適用於 PIC16F18856-I/SS — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16F18856-I/SS （相同外形與佔位） — 差異在於 ADC, Package, Core Architecture, Program Memory (Flash), Operating Temperature.
PIC16F18876-I/SS
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16F18857-I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16F18855-I/SSVAO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF18856-I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16F15344-I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16F18856-I/SS 最大額定值與電氣特性
| Core Architecture | PIC16 8-bit RISC, 14-bit instruction word |
| Maximum CPU Frequency | 32 MHz |
| Program Memory (Flash) | 28 KB |
| Data SRAM | 2048 bytes |
| Data EEPROM | 256 bytes |
| Supply Voltage (Vdd) | 1.8 V to 5.5 V |
| I/O Pins | 25 (typical, package-dependent) |
| ADC | 10-bit with computation, multiple channels |
| DAC | 5-bit |
| Comparators | 2 |
| Timers | 11 |
| CCP / PWM Modules | 5 |
| EUSART | Multiple |
| I²C / SPI | 2 I²C, 2 SPI |
| Functional Safety | Yes (FuSa, IEC 60730 Class B capable) |
| eXtreme Low Power (XLP) | Yes (nA-range sleep current) |
| Peripheral Pin Select (PPS) | Yes |
| CRC/SCAN | Hardware memory-integrity block |
| 工作溫度 | -40 °C to +85 °C (Industrial) |
| 封裝 | 28-pin SSOP (5.30 mm body) |
| 安裝類型 | Surface Mount |
| MSL 等級 | 1 |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
PIC16F18856-I/SS 腳位配置
| 腳位 1 | RA5 — General-purpose I/O / PPS-reassignable |
| 腳位 2 | RA4 — General-purpose I/O / PPS-reassignable |
| 腳位 3 | RA3 — General-purpose I/O |
| 腳位 4 | RA2 — General-purpose I/O |
| 腳位 5 | RA1 — General-purpose I/O / ICSPCLK |
| 腳位 6 | RA0 — General-purpose I/O / ICSPDAT |
| 腳位 7 | VSSOP — Ground reference |
| 腳位 8 | RA7 — General-purpose I/O / OSC1 |
| 腳位 9 | RA6 — General-purpose I/O / OSC2 |
| 腳位 10 | RC0 — General-purpose I/O / PPS-reassignable |
| 腳位 11 | RC1 — General-purpose I/O / PPS-reassignable |
| 腳位 12 | RC2 — General-purpose I/O / PPS-reassignable |
| 腳位 13 | RC3 — General-purpose I/O / SCL1 |
| 腳位 14 | RC4 — General-purpose I/O / SDA1 |
| 腳位 15 | RC5 — General-purpose I/O / PPS-reassignable |
| 腳位 16 | RC6 — General-purpose I/O / TX1 |
| 腳位 17 | RC7 — General-purpose I/O / RX1 |
| 腳位 18 | VSSOP — Ground reference |
| 腳位 19 | RB0 — General-purpose I/O / ZCD input |
| 腳位 20 | RB1 — General-purpose I/O / PPS-reassignable |
| 腳位 21 | RB2 — General-purpose I/O / PPS-reassignable |
| 腳位 22 | RB3 — General-purpose I/O / PPS-reassignable |
| 腳位 23 | RB4 — General-purpose I/O / PPS-reassignable |
| 腳位 24 | RB5 — General-purpose I/O / PPS-reassignable |
| 腳位 25 | RB6 — General-purpose I/O / ICSPCLK |
| 腳位 26 | RB7 — General-purpose I/O / ICSPDAT |
| 腳位 27 | VDDOP — Positive supply voltage |
| 腳位 28 | MCLROP — Master Clear / reset input |
典型應用
PIC16F18856-I/SS 適用於 6 應用s: Battery-Powered IoT Sensor Node, Industrial Sensor Conditioning, Functional Safety Subsystem (Class B / IEC 60730), Low-Power Wireless Motor Control, Portable Medical Instrument, Home Appliance Control Board.
Battery-Powered IoT Sensor Node
The PIC16F18856-I/SS fits IoT sensor nodes because its XLP technology achieves nanoamp-range sleep current and its 10-bit ADC-with-computation performs averaging, oversampling, and threshold comparisons in hardware. The 28KB Flash hosts protocol stacks and sensor-fusion firmware, while the 256-byte EEPROM stores calibration constants that survive battery swaps. With 1.8V-5.5V Vdd, the MCU can be powered directly from a single Li-Ion or two-AA cell. PPS routing keeps the PCB small by remapping I²C/SPI/UART to almost any I/O pin. Brown-out, watchdog timer, and IEC 60730 Class B support increase reliability in unattended field deployments.
推薦
Industrial Sensor Conditioning
The PIC16F18856-I/SS excels in industrial sensor conditioning because its 10-bit ADC with computation delivers hardware averaging and threshold interrupt, offloading the CPU from sampling math. The 2 comparators provide hardware threshold detection for 4-20mA loop signals, while the 5-bit DAC generates excitation voltages for ratiometric bridges. With industrial temperature range (-40°C to +85°C) and 1.8V-5.5V Vdd, the device tolerates plant-supply variations. Functional Safety support (IEC 60730 Class B) with hardware CRC/SCAN helps satisfy safety audit requirements in process-control equipment. PPS keeps board routing simple even with multiple sensor interfaces.
推薦
Functional Safety Subsystem (Class B / IEC 60730)
The PIC16F18856-I/SS is qualified for Functional Safety subsystems because it integrates hardware CRC/SCAN for memory integrity, a windowed watchdog timer, dual oscillator fail-safe, and dedicated self-test firmware libraries. It supports the IEC 60730 Class B Class-C library on whitegoods and HVAC equipment, allowing safety-critical decision logic on-chip without an external supervisor. The XLP technology keeps standby current low in always-on safety monitoring, and the 28-SSOP package is widely accepted by safety-approved appliance designers. The PPS system enables flexible PCB routing while preserving safety-relevant pin assignments.
推薦
Low-Power Wireless Motor Control
The PIC16F18856-I/SS fits low-power wireless motor control because its 11 timers and 5 CCP/PWM modules generate complementary PWM with dead-band control for small brushless DC and brushed DC drivers. The 32MHz clock supports up to 8 MIPS instruction throughput, which is sufficient for closed-loop PID control of small pumps and fans. PPS allows the user to route PWM channels to the most convenient board-edge pins for the gate-driver layout. With nanoamp sleep current, the device can idle between command updates and wake on a comparator edge triggered by an external sensor or RF receiver interrupt.
推薦
Portable Medical Instrument
The PIC16F18856-I/SS fits portable medical instruments because its XLP technology extends battery life, its ADC-with-computation reduces host CPU load in biosignal processing, and its 1.8V-5.5V Vdd simplifies single-cell Li-Ion designs. The Functional Safety libraries can support IEC 60601 self-test workflows in patient-adjacent accessories (subject to qualification by the system integrator). 28KB Flash and 2KB SRAM are sufficient for pulse-oximetry, body-temperature, and simple spirometry firmwares. Hardware CRC/SCAN protects against firmware corruption that could compromise patient data.
推薦
Home Appliance Control Board
The PIC16F18856-I/SS is widely used in home appliance control boards because IEC 60730 Class B library support simplifies safety certification for washing machines, dishwashers, and HVAC actuators. The device's 28-SSOP package and 1.8V-5.5V Vdd accept the wide supply ranges typical of rectified mains appliances. Capture/compare modules handle triac zero-cross detection and PWM motor drive, while PPS routes the user interface UART to the HMI connector without layout changes. XLP enables standby current below IEC energy-saving limits when the appliance is idle.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16F18856-I/SS — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16F18876-I/SS | PIC16F18857-I/SS | PIC16F18855-I/SS | PIC16LF18856-I/SS | PIC16F15344-I/SS |
|---|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP | 28-SSOP | 28-SSOP | 28-SSOP | 28-SSOP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 28 KB | 56 KB | 28 KB | 14 KB | 28 KB | 7 KB |
| Data SRAM | 2048 bytes | 4096 bytes | 2048 bytes | 1024 bytes | 2048 bytes | 512 bytes |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Vdd Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 5.5 V |
| Functional Safety (IEC 60730) | Yes (FuSa) | Yes (FuSa) | Yes (FuSa) | Yes (FuSa) | Yes (FuSa) | No |
| Peripheral Pin Select (PPS) | Yes | Yes | Yes | Yes | Yes | Yes |
主要差異化特點
- Functional Safety (IEC 60730 Class B) on-chip (對比PIC16F15344-I/SS)
- XLP nanoamp-range sleep current (對比PIC16F18855-I/SS)
- Wide 1.8V-5.5V Vdd with full 32MHz operation (對比PIC16LF18856-I/SS)
設計說明
Place a 0.1µF ceramic decoupling capacitor as close as possible to the Vdd pin (pin 27) and a 10µF bulk capacitor on the same net; this combination suppresses high-frequency noise on the analog supply rail and stabilizes ADC readings. For battery-powered designs, the XLP sleep mode drops current into the nanoamp range, but the MCU still needs the 0.1µF cap to retain state through the wake-up transient. Brown-out reset is enabled in configuration bits to prevent code corruption when the cell voltage sags.
Use the Peripheral Pin Select (PPS) feature to remap digital peripherals such as UART, I²C, and SPI to the most convenient board-edge pins. Estimated routing simplification: routing flexibility equivalent to moving up to ~12 pin assignments post-PCB layout. Keep ADC traces short and away from PWM outputs to avoid digital-noise coupling into analog readings.
Do not exceed 5.5V on Vdd; the absolute maximum rating is 6.5V with no reliability guarantee above the data-sheet limit. When migrating from a PIC16F1F (legacy) part, ensure PPS assignments are remapped - the PPS register definitions changed between PIC16F1xD and PIC16F1885X families, and stale code may route peripherals to NC pins. The MCLR pin (pin 28) must be pulled up through a 10kΩ resistor if not used as a reset input.
The 28-SSOP package has θJA ≈ 84°C/W on a 2-layer JEDEC test board, so total power dissipation is limited by ambient temperature. Estimated: at 5V/32MHz with all peripherals active, internal dissipation is roughly 12mW, giving a junction rise of ~1°C above ambient - thermal performance is not a design concern for typical embedded loads.
合規資訊
RoHS compliant per Microchip product page. AEC-Q100 not formally qualified for this part number; automotive-grade variants are released separately. IEC 60730 Class B Functional Safety support is documented in Microchip application libraries and is enabled through specific firmware libraries.
