PIC16F18855T-I/SS - 8-bit XLP MCU, 14KB Flash, 28-SSOP | Microchip
MPN: PIC16F18855T-I/SS ✓ Hoạt độngPIC16F18855T-I/SS Tóm tắt
An 8-bit microcontroller (MCU) is a self-contained compute subsystem built around a low-pin-count CPU core, on-chip non-volatile program memory, data SRAM, and a rich set of digital and analog peripherals. PIC microcontrollers from Microchip implement a RISC-based Harvard architecture with single-cycle instruction execution, making them deterministic and easy to use for real-time control. The PIC16F18855 belongs to the eXtreme Low-Power (XLP) family, which minimises active and sleep current to extend battery life in portable products.
Key features include 14KB self-programmable Flash (8K x 14 words), 1KB SRAM, 256 bytes EEPROM, 24 MHz internal HFINTOSC (selectable up to 32 MHz via 4x PLL), 10-bit ADC with Computation (ADC2), 5-/8-bit DAC, multiple comparators, 16-bit PWMs, configurable logic cells (CLC), zero-cross detect (ZCD), and a Hardware Limit Timer (HLT). CRC/SCAN and HLT peripherals support Functional Safety diagnostics commonly needed in IEC 60730-class designs.
Architecturally, the device pairs the enhanced mid-range PIC16 CPU with direct memory-mapped peripherals, allowing single-instruction access to most registers. eXtreme Low Power modes (sleep currents down to the nA range with peripheral wake) make the part suitable for energy-harvesting and always-on sensor nodes. The wide 2.3V–5.5V supply range simplifies interfacing to 3.3V and 5V analog front-ends.
Typical applications include industrial control panels, consumer appliances, low-power IoT sensor nodes, automotive body and comfort subsystems (with the VAO variant), battery-powered instrumentation, and Human-Machine Interface (HMI) drivers that need segmented LCD or PWM-controlled indicators.
When designing with this MCU, allocate the ICSP™/ICD pins (PGC/PGD) away from high-noise traces and provide a 100 nF decoupling capacitor adjacent to every VDD pin pair. The 28-SSOP footprint allows hand-soldering for prototypes while still supporting volume SMT assembly via the Tape-and-Reel format.
This page synthesizes distributor pricing, drop-in alternatives from the PIC16F18855 family, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC16F18855T-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 PIC16F18855T-I/SS (cùng hình factor và footprint) — khác nhau ở Package, ADC, Core Architecture, Operating Temperature, DAC.
PIC16F18855-I/SSVAO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F18855-I/SSVAO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F18855-E/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F18855T-E/SSVAO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F18854-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F18855T-I/SS Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16 enhanced mid-range 8-bit RISC (Harvard) |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 1 KB |
| Data EEPROM | 256 bytes |
| Maximum CPU Frequency | 32 MHz (4x PLL from HFINTOSC) |
| Instruction Cycle Time | 125 ns @ 32 MHz |
| Operating Voltage (VDD) | 2.3 V to 5.5 V |
| I/O Pins | 25 (on 28-pin SSOP) |
| ADC | 10-bit ADC2 with Computation, up to [DATA_NEEDS 21 channels] |
| DAC | 5-bit and 8-bit DAC modules |
| Comparators | 2 rail-to-rail comparators |
| PWM Channels | 16-bit PWM with multiple outputs |
| Timers | Multiple 8/16-bit timers, HLT, SMT |
| Communication Peripherals | UART, SPI, I2C (MSSP), LIN-capable EUSART |
| Core Independent Peripherals | CLC, ZCD, NCO, CRC/SCAN, HLT |
| Functional Safety (FuSa) | Yes - IEC 60730 class-B support features |
| Low-Power Modes | XLP: nA sleep currents with RTCC |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial, "I") |
| Hộp | 28-pin SSOP (0.209" / 5.30 mm body width) |
| Kiểu lắp đặt | Surface Mount (Tape & Reel, "T") |
| Cấp MSL | MSL1 (per JEDEC J-STD-020) |
| Lead-Free / RoHS | Yes - Compliant |
| Programming / Debug | ICSP (PGC/PGD), ICD |
Cấu hình chân PIC16F18855T-I/SS
| Chân 1 | RA2/AN2 — Port A bit 2 / analog input 2 |
| Chân 2 | RA3/AN3 — Port A bit 3 / analog input 3 |
| Chân 3 | RA4/AN4 — Port A bit 4 / analog input 4 |
| Chân 4 | RA5/AN5 — Port A bit 5 / analog input 5 |
| Chân 5 | VDD — Positive supply (2.3V to 5.5V) |
| Chân 6 | VSS — Ground reference |
| Chân 7 | RA0/AN0 — Port A bit 0 / analog input 0 |
| Chân 8 | RA1/AN1 — Port A bit 1 / analog input 1 |
| Chân 9 | RB0/AN12 — Port B bit 0 / analog input 12 |
| Chân 10 | RB1/AN10 — Port B bit 1 / analog input 10 |
| Chân 11 | RB2/AN8 — Port B bit 2 / analog input 8 |
| Chân 12 | RB3/AN9 — Port B bit 3 / analog input 9 |
| Chân 13 | RB4 — Port B bit 4 |
| Chân 14 | RB5 — Port B bit 5 |
| Chân 15 | RB6/PGC — Port B bit 6 / ICSP clock (programming/debug) |
| Chân 16 | RB7/PGD — Port B bit 7 / ICSP data (programming/debug) |
| Chân 17 | RC0 — Port C bit 0 |
| Chân 18 | RC1 — Port C bit 1 |
| Chân 19 | RC2 — Port C bit 2 |
| Chân 20 | RC3 — Port C bit 3 |
| Chân 21 | RC4 — Port C bit 4 |
| Chân 22 | RC5 — Port C bit 5 |
| Chân 23 | RC6 — Port C bit 6 |
| Chân 24 | RC7 — Port C bit 7 |
| Chân 25 | RD0 — Port D bit 0 |
| Chân 26 | RD1 — Port D bit 1 |
| Chân 27 | RD2 — Port D bit 2 |
| Chân 28 | VSS — Ground reference (second VSS pin) |
Ứng dụng tiêu biểu
PIC16F18855T-I/SS phù hợp cho 6 Áp dụngs: Low-Power IoT Sensor Nodes, Industrial Control Panels and HMI, Automotive Body and Comfort Electronics, Battery-Powered Instrumentation, Consumer Appliance Control Boards, Educational and Maker Development Boards.
Low-Power IoT Sensor Nodes
The PIC16F18855T-I/SS fits low-power IoT sensor nodes because its XLP architecture delivers nanoamp sleep currents while keeping the 8-bit PIC16 CPU instantly wakeable on peripheral events such as ADC threshold, ZCD or timer compare. With 14KB Flash it can run a Contiki-class or proprietary 6LoWPAN/BLE-frontend state machine plus UART/SPI/I2C drivers without external memory. The 25 I/O lines on 28-SSOP are sufficient to drive a sensor front-end plus a simple segmented-LCD or status LED. Industrial -40C to +85C rating allows outdoor or factory-floor deployment. Design tip: use Sleep mode with RTCC plus a single ADC2 channel to achieve multi-year battery life from a CR2032 cell.
Được đề xuất
Industrial Control Panels and HMI
For industrial control panels the PIC16F18855T-I/SS provides 16-bit PWM, configurable logic cells (CLC), and 10-bit ADC2 with computation - ideal for driving indicator LEDs, opto-isolated inputs and rotary-encoder or matrix-keypad HMIs. The 32 MHz core delivers 8 MIPS, more than enough for protocol stacks and PID loops running concurrently. Functional Safety features (CRC/SCAN, HLT) help meet IEC 60730-class requirements for white goods and process-control equipment. The 28-SSOP footprint is easily hand-solderable for prototypes and reflow-solderable for production, simplifying NPI. Design tip: use the CLC to debounce quadrature encoder inputs in hardware, freeing CPU bandwidth for the application stack.
Được đề xuất
Automotive Body and Comfort Electronics
The PIC16F18855T-I/SS is suitable for non-safety automotive body and comfort subsystems such as seat heaters, interior lighting, mirror control and HVAC actuators. The integrated EUSART with LIN auto-baud support enables LIN-slave node implementations for window lifters, mirror modules and door locks. For applications that require formal AEC-Q100 qualification, the SSVAO/VAO variant (PIC16F18855-I/SSVAO) drops into the same SSOP-28 footprint. The wide 2.3V-5.5V supply tolerates automotive load-dump transients with external TVS protection. Design tip: use ZCD plus a TRIAC driver stage for mains-dimmable AC lamp modules, and add the Hardware Limit Timer (HLT) to detect stuck keypad or relay faults.
Được đề xuất
Battery-Powered Instrumentation
Battery-powered handheld instruments benefit from the PIC16F18855T-I/SS XLP architecture: deep sleep currents in the nanoamp range, fast wake from the RTCC or ADC2, and the 5-/8-bit DAC for sensor excitation or reference biasing. The 1KB SRAM and 14KB Flash comfortably support small data-logging stacks with SPI/I2C sensor front-ends. The industrial -40C to +85C rating covers cold-weather outdoor use. Design tip: enable the ADC2 hardware averaging and threshold-interrupt to keep the CPU asleep until a meaningful event is detected, dramatically reducing average current.
Được đề xuất
Consumer Appliance Control Boards
White-goods and small appliance mainboards are well served by the PIC16F18855T-I/SS: 16-bit PWM drives brushed or BLDC small motors, the integrated comparators implement zero-cross dimmers, and the 10-bit ADC reads NTC temperature sensors for closed-loop heating control. Core Independent Peripherals (CLC, ZCD, NCO) handle timing-critical signal conditioning in hardware without CPU intervention. The 28-SSOP land pattern is well-supported by global EMS lines and minimises PCB area versus 40-pin devices. Design tip: leverage the Functional Safety (CRC/SCAN, HLT) blocks to meet IEC 60730 class-B without external watchdog parts.
Được đề xuất
Educational and Maker Development Boards
The PIC16F18855T-I/SS is an excellent teaching MCU because it pairs the classic 8-bit PIC16 instruction set with modern CIPs and Functional Safety features, giving students exposure to both legacy and current embedded concepts. The 28-SSOP footprint works on standard breadboard-friendly adapter PCBs and the ICSP pins (PGC/PGD on RB6/RB7) integrate directly with the PICkit 4, MPLAB Snap and Curiosity development boards from Microchip. The free MPLAB X IDE, XC8 compiler and MCC configurator dramatically reduce the learning-curve. Design tip: use the CLC peripheral to teach hardware-state-machine concepts without writing interrupt code.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F18855T-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 | PIC16F18855-I/SS | PIC16F18855-I/SSVAO | PIC16F18855-E/SS | PIC16F18854-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Flash Memory | 14 KB | 14 KB | 14 KB | 14 KB | 7 KB (-50%) |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 512 B (-50%) |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| Max CPU 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 | 2.3 V to 5.5 V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +125C (Auto) | -40C to +125C (Extended) | -40C to +85C |
| AEC-Q100 Qualified | No | No | Yes (VAO) | No | No |
| Reel / Tray Packing | Tape & Reel (T) | Tray (no T) | Tray | Tray | Tray |
Bảo phân biệt quan trọng
- Tape-and-Reel ("T") packing format directly compatible with high-volume SMT lines (vsPIC16F18855-I/SS (tray packing))
- Core Independent Peripherals (CLC, ZCD, NCO, CRC/SCAN, HLT) on-chip (vsPIC16F18854-I/SS)
- Functional Safety (FuSa) IEC 60730-class B hardware features (vsPIC16F18855T-I/ML (QFN-28, same die))
Ghi chú thiết kế
Place a 100 nF X7R 0402/0603 ceramic decoupling capacitor within 3 mm of every VDD pin and a single 10 uF bulk capacitor near the IC. For battery-powered designs, leverage the PIC16F18855 XLP Sleep mode (nA-level current with RTCC active) and ADC2 threshold interrupts to keep the CPU asleep until a meaningful sensor event occurs. The wide 2.3V-5.5V range means a single 3.3V LDO is sufficient; do not add a 1.8V rail unless an external sensor requires it.
Route the ICSP lines PGC (RB6) and PGD (RB7) away from switching traces and PWM outputs. Keep PGC/PGD traces under 100 mm and provide a test-point or 100-mil header footprint for production-line programming. For SSOP-28, use a 0.65 mm pitch land pattern with solder-mask-defined (SMD) pads to reduce tombstoning during reflow. Avoid running long parallel traces under the IC to minimise coupling into the analog AVSS/AVDD pair.
Do not exceed 5.5V on any pin or VDD; the IC does not have 5V-tolerant I/O above the supply. When migrating from PIC16F18855T-I/SS to PIC16F18855-I/SSVAO for automotive qualification, the LATCH-UP and ESD characteristics change; verify IEC 61000-4-2 results on the final board. Also remember the "/SS" 28-SSOP variant and "/ML" 28-QFN variant share the pinout but require different PCB land patterns - mixing them produces assembly failures.
Although the 8-bit PIC16F18855T-I/SS rarely dissipates meaningful power (typically <100 mW at 32 MHz, 5V), verify SSOP-28 thermal resistance in thermally enclosed housings. Estimated: with theta_JA around 95 C/W on a 1-oz copper 4-layer JEDEC test board, full-load operation at 85 C ambient is fine. In an enclosed plastic appliance, derate ambient by 10-15 C to maintain margin and ensure the brown-out reset (BOR) is enabled to protect Flash during supply dips.
Thông tin tuân thủ
Industrial -40C to +85C grade; AEC-Q100 only on VAO/SSVAO orderable parts. RoHS/REACH compliance stated by Microchip product page and distributor listings.
