PIC16F18856-I/SS - 8-Bit 32MHz 28KB Flash MCU 28-SSOP | Microchip
MPN: PIC16F18856-I/SS ✓ Hoạt độngPIC16F18856-I/SS Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC16F18856-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 PIC16F18856-I/SS (cùng hình factor và footprint) — khác nhau ở ADC, Package, Core Architecture, Program Memory (Flash), Operating Temperature.
PIC16F18876-I/SS
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F18857-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F18855-I/SSVAO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF18856-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F15344-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F18856-I/SS Tỷ lệ tối đa & tính chất điện
| 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 |
| Nhiệt độ hoạt động | -40 °C to +85 °C (Industrial) |
| Hộp | 28-pin SSOP (5.30 mm body) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân PIC16F18856-I/SS
| Chân 1 | RA5 — General-purpose I/O / PPS-reassignable |
| Chân 2 | RA4 — General-purpose I/O / PPS-reassignable |
| Chân 3 | RA3 — General-purpose I/O |
| Chân 4 | RA2 — General-purpose I/O |
| Chân 5 | RA1 — General-purpose I/O / ICSPCLK |
| Chân 6 | RA0 — General-purpose I/O / ICSPDAT |
| Chân 7 | VSSOP — Ground reference |
| Chân 8 | RA7 — General-purpose I/O / OSC1 |
| Chân 9 | RA6 — General-purpose I/O / OSC2 |
| Chân 10 | RC0 — General-purpose I/O / PPS-reassignable |
| Chân 11 | RC1 — General-purpose I/O / PPS-reassignable |
| Chân 12 | RC2 — General-purpose I/O / PPS-reassignable |
| Chân 13 | RC3 — General-purpose I/O / SCL1 |
| Chân 14 | RC4 — General-purpose I/O / SDA1 |
| Chân 15 | RC5 — General-purpose I/O / PPS-reassignable |
| Chân 16 | RC6 — General-purpose I/O / TX1 |
| Chân 17 | RC7 — General-purpose I/O / RX1 |
| Chân 18 | VSSOP — Ground reference |
| Chân 19 | RB0 — General-purpose I/O / ZCD input |
| Chân 20 | RB1 — General-purpose I/O / PPS-reassignable |
| Chân 21 | RB2 — General-purpose I/O / PPS-reassignable |
| Chân 22 | RB3 — General-purpose I/O / PPS-reassignable |
| Chân 23 | RB4 — General-purpose I/O / PPS-reassignable |
| Chân 24 | RB5 — General-purpose I/O / PPS-reassignable |
| Chân 25 | RB6 — General-purpose I/O / ICSPCLK |
| Chân 26 | RB7 — General-purpose I/O / ICSPDAT |
| Chân 27 | VDDOP — Positive supply voltage |
| Chân 28 | MCLROP — Master Clear / reset input |
Ứng dụng tiêu biểu
PIC16F18856-I/SS phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F18856-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 | 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 |
Bảo phân biệt quan trọng
- Functional Safety (IEC 60730 Class B) on-chip (vsPIC16F15344-I/SS)
- XLP nanoamp-range sleep current (vsPIC16F18855-I/SS)
- Wide 1.8V-5.5V Vdd with full 32MHz operation (vsPIC16LF18856-I/SS)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
