PIC16F18855T-I/SO - 8-Bit 32MHz XLP MCU 14KB Flash 28-SOIC | Microchip
MPN: PIC16F18855T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.46 | $14.60 |
| 100 | $1.21 | $121.00 |
| 500 | $1.04 | $520.00 |
| 1,000 | $0.92 | $920.00 |
| 3,000 | $0.81 | $2,430.00 |
PIC16F18855T-I/SO Overview
A microcontroller (MCU) is a single-chip computer that contains a processor core, memory, and programmable input/output peripherals. Within the semiconductor taxonomy, an MCU belongs to the integrated circuits hierarchy: microcontroller -> 8-bit microcontroller -> embedded controller -> semiconductor. The PIC16F18855 specifically belongs to Microchip's enhanced mid-range 8-bit core family, which adds more instructions and peripherals over baseline PIC16 devices. The 'XLP' (eXtreme Low Power) designation indicates deep-sleep currents in the nanoamp range, making the part suited to battery-powered designs.
Key differentiating features of the PIC16F18855T-I/SO include 14KB of self-programmable Flash, 1KB of SRAM, 256 bytes of EEPROM, integrated CRC/SCAN for functional safety, Hardware Limit Timer (HLT), and a suite of Core Independent Peripherals that operate without CPU intervention. The device supports operation from 1.8V to 5.5V and integrates communication peripherals such as EUSART, SPI, and I2C, alongside multiple timers and a 10-bit ADC with computation.
Technically, the PIC16F18855 implements an enhanced mid-range 8-bit Harvard architecture with a 14-bit instruction word, delivering 32MHz operation (8MHz internal oscillator with 4x PLL) and a wide array of analog and digital peripherals. The 'T' suffix indicates Tape and Reel packaging, the 'I' indicates the industrial temperature grade (-40C to +85C), and 'SO' denotes the 28-pin SOIC wide-body (300-mil) package.
Typical applications include consumer electronics remote controls, IoT sensor nodes, battery-powered handheld instruments, LED lighting controllers, and low-power industrial sensor interfaces. The wide voltage range and functional-safety features make it suitable for safety-critical home appliances and industrial control.
Designers should verify pin assignments against the datasheet pinout table and confirm that the chosen programmer/debugger (such as PICkit 4 or MPLAB ICD 4) supports this specific device within MPLAB X IDE. For automotive applications, dedicated AEC-Q100 qualified parts in the same family should be considered instead.
Drop-in alternatives for PIC16F18855T-I/SO — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16F18855T-I/SO (same form factor and footprint) — differing in ADC, MSL Level, Package, Program Memory (Flash), Family.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18855-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18855-E/SO
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16F18854T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18455T-I/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.08 / Unit
View Datasheet →PIC16F18875-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18855T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit Enhanced Mid-Range |
| Family | PIC® XLP™ 16F, Functional Safety (FuSa) |
| CPU Speed (Max) | 32 MHz |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| SRAM | 1 KB |
| EEPROM | 256 bytes |
| Operating Voltage Range | 1.8 V to 5.5 V |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Package | 28-SOIC (Wide Body, 300-mil) |
| Pin Count | 28 |
| Mounting Type | Surface Mount |
| ADC | 10-bit with Computation |
| Communication Peripherals | EUSART, SPI, I2C |
| Core Independent Peripherals (CIPs) | Yes (CRC/SCAN, HLT, CWG, NCO, DSM) |
| MSL Level | MSL1 (per JEDEC J-STD-020) |
| Lead-Free / RoHS | Yes / Compliant |
| Functional Safety Support | Yes (FuSa features) |
| Packaging Format | Tape and Reel |
PIC16F18855T-I/SO Pin Configuration
| Pin 1 | VDD — Positive power supply (1.8V to 5.5V) |
| Pin 2 | RA0 — Bidirectional I/O / analog input / op-amp output |
| Pin 3 | RA1 — Bidirectional I/O / analog input / op-amp inverting input |
| Pin 4 | RA2 — Bidirectional I/O / analog input / DAC output |
| Pin 5 | RA3 — Bidirectional I/O (input only) / analog input / VREF+ |
| Pin 6 | RA4 — Bidirectional I/O / analog input |
| Pin 7 | RA5 — Bidirectional I/O / analog input / VREF- |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA7 — Bidirectional I/O / analog input / OSC1 |
| Pin 10 | RA6 — Bidirectional I/O / analog input / OSC2 |
| Pin 11 | RC0 — Bidirectional I/O / analog input |
| Pin 12 | RC1 — Bidirectional I/O / analog input |
| Pin 13 | RC2 — Bidirectional I/O / analog input |
| Pin 14 | RC3 — Bidirectional I/O / analog input / SCL (I2C) |
| Pin 15 | RC4 — Bidirectional I/O / analog input / SDA (I2C) |
| Pin 16 | RC5 — Bidirectional I/O / analog input |
| Pin 17 | RC6 — Bidirectional I/O / TX/CK (EUSART) |
| Pin 18 | RC7 — Bidirectional I/O / RX/DT (EUSART) |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive power supply (1.8V to 5.5V) |
| Pin 21 | RB0 — Bidirectional I/O / analog input / INT |
| Pin 22 | RB1 — Bidirectional I/O / analog input |
| Pin 23 | RB2 — Bidirectional I/O / analog input |
| Pin 24 | RB3 — Bidirectional I/O / analog input |
| Pin 25 | RB4 — Bidirectional I/O / analog input |
| Pin 26 | RB5 — Bidirectional I/O / analog input |
| Pin 27 | RB6 — Bidirectional I/O / ICD clock (programming/debug) |
| Pin 28 | RB7/ICSPDAT — Bidirectional I/O / ICD data (programming/debug) |
Typical Applications
PIC16F18855T-I/SO is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Consumer Electronics Remote Controls, Industrial Sensor Interface Modules, LED Lighting Controllers, Home Appliance User Interface Boards, Automotive Interior Sub-Systems (Non-Safety).
Battery-Powered IoT Sensor Nodes
The PIC16F18855T-I/SO fits IoT sensor nodes because its 1.8V to 5.5V operating range and XLP eXtreme Low Power modes deliver nanoamp-level sleep current directly compatible with single-cell Li-ion or 2x AA batteries. The 14KB Flash and 1KB SRAM host firmware stacks including periodic sensor reads, calibration coefficients, and AES-128 secured transmissions. Its Core Independent Peripherals (CRC/SCAN for data integrity, Hardware Limit Timer for safety, Configurable Logic Cell for wake-up events) offload work from the CPU, letting the part stay in deep sleep for 99% of the duty cycle and run at 32MHz only during transmission bursts - a trade-off that single-chip ARM Cortex-M0+ devices cannot match at this price point.
Recommended
Consumer Electronics Remote Controls
The PIC16F18855T-I/SO is a strong fit for consumer remote controls because its XLP sleep current under 100nA keeps coin-cell batteries alive for years. With 14KB of Flash it can host multi-protocol IR libraries (RC5/RC6/Sony/NEC) plus additional BLE pairing logic, while the integrated 10-bit ADC handles battery voltage monitoring without external components. The PIC16F18855's Hardware Limit Timer (HLT) allows safe motor control for projector-screen remotes or camera shutters. Compared with 32-bit ARM alternatives, the 28-SOIC PIC16F18855T-I/SO offers a sub-$1 bill-of-materials price point while still exposing UART, SPI, and I2C for accessories such as OLED status displays.
Recommended
Industrial Sensor Interface Modules
The PIC16F18855T-I/SO is well suited for industrial sensor interfaces thanks to its 1.8V to 5.5V range, integrated 10-bit ADC with computation, and Functional Safety (FuSa) features including CRC/SCAN memory integrity checking. In a 4-20mA sensor transmitter, the 32MHz CPU can sample, linearize, and output at up to 100kHz. The 28-SOIC wide-body package supports -40C to +85C industrial temperature operation, and the device tolerates harsh factory environments with on-chip EMC hardening. For HART-protocol sensor nodes, the integrated EUSART handles asynchronous serial framing without external bridge ICs, reducing PCB area and BOM cost.
Recommended
LED Lighting Controllers
The PIC16F18855T-I/SO is widely used in LED lighting controllers because its Configurable Logic Cell (CLC), Complementary Waveform Generator (CWG), and Numerically Controlled Oscillator (NCO) deliver flicker-free PWM dimming without CPU intervention. The 14KB Flash stores lighting effects libraries, while 1KB SRAM supports DMX-512 or DALI protocol parsing. The 1.8V minimum supply allows direct operation from a single-cell LiFePO4 battery in portable or emergency luminaires. At 32MHz the device computes gamma-corrected brightness curves in real time, matching the visual quality of larger Cortex-M0 designs at lower cost.
Recommended
Home Appliance User Interface Boards
The PIC16F18855T-I/SO is appropriate for home appliance UI boards because its Functional Safety (FuSa) features satisfy IEC 60730 Class B requirements for household appliances. The 10-bit ADC with hardware Capacitive Voltage Divider (CVD) drives up to 16 touch buttons without a dedicated touch IC, while the integrated EUSART/SPI/I2C interfaces connect directly to the appliance main controller. Industrial -40C to +85C operation handles kitchen environments. Compared with more expensive Cortex-M0+ designs, the PIC16F18855T-I/SO delivers adequate MIPS for capacitive touch scanning, LED animation, and user feedback at a bill-of-materials cost typically 30-40% lower.
Recommended
Automotive Interior Sub-Systems (Non-Safety)
The PIC16F18855T-I/SO can be used for non-safety automotive interior sub-systems such as ambient lighting controllers, seat memory switches, and HVAC knob interfaces, where its Functional Safety (FuSa) support and CRC/SCAN provide diagnostic coverage. Its wide voltage range tolerates 12V battery transients when paired with a simple LDO. For safety-critical applications like airbag or electronic stability control, designers should select AEC-Q100 qualified PIC16F18855 variants rather than the industrial-grade 'I' suffix part shown here. The 28-SOIC wide-body package survives automotive vibration profiles and is compatible with standard SMT lines used by tier-1 suppliers.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18855T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18855-I/SO | PIC16F18855-E/SO | PIC16F18854T-I/SO | PIC16F18455T-I/SO | PIC16F18875-I/SO |
|---|---|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Family | PIC16F XLP FuSa 8-bit | PIC16F XLP FuSa 8-bit | PIC16F XLP FuSa 8-bit | PIC16F XLP FuSa 8-bit | PIC16F XLP 8-bit (no FuSa) | PIC16F XLP FuSa 8-bit |
| Flash Program Memory | 14 KB | 14 KB | 14 KB | 7 KB | 14 KB | 28 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Maximum CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 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 5.5 V | 1.8 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (I) | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Functional Safety (FuSa) | Yes (CRC/SCAN, HLT) | Yes (CRC/SCAN, HLT) | Yes (CRC/SCAN, HLT) | Yes (CRC/SCAN, HLT) | No | Yes (CRC/SCAN, HLT) |
Key Differentiators
- Functional Safety (FuSa) features integrated (vs PIC16F18455T-I/SO)
- Larger program memory than nearest-cost sibling (vs PIC16F18854T-I/SO)
- Same-package family upgrade path (vs PIC16F18855-I/SO)
Design Notes
Place a 100nF decoupling capacitor as close as possible to each VDD/VSS pin pair (pins 1/8 and 20/19 on the 28-SOIC) plus a single bulk 10uF ceramic on the main VDD trace. The PIC16F18855T-I/SO supports 1.8V to 5.5V, so for 5V USB-powered designs a simple LDO such as MCP1700 is adequate. For battery operation, route the cell directly to VDD to benefit from XLP nanoamp sleep current; add a series ferrite bead to suppress high-frequency noise from switching regulators placed upstream.
Keep the ICSP clock and data lines (RB6/RB7, pins 27/28) routed as short as possible, with no series resistors or signal vias between the MCU and the ICSP header, because the debugger imposes logic-level edges at up to 10MHz. Reserve a 6-pin 0.1 inch header footprint (or 4-wire Tag-Connect pads) on production boards even if you program in-circuit during OEM build, since field firmware updates require ICSP access. Place the ICSP connector at the PCB edge to avoid interference with shields or housings.
Do not connect RA0/RA1 to analog signals exceeding VDD; the op-amp inputs are rail-to-rail but ESD structures are not. Always configure unused pins as outputs low (not inputs with pull-ups) to minimize sleep current by 1-2uA per floating pin. When migrating from PIC16F18455 to PIC16F18855, verify the Configuration Word settings because the new FuSa bits (CRCEN, SCANEN) change reset behavior - default values disable them but the firmware linker script must mirror these settings.
For I2C lines (RC3/RC4), place 4.7kohm pull-ups to VDD and keep the bus under 100mm total length to maintain 400kHz Fast Mode integrity. If the design uses long cables or capacitive loads, switch to 100kHz Standard Mode or add an I2C buffer such as LTC4311. For SPI signals used with flash or radio modules, source-terminate the CLK line with a 33ohm resistor when the trace exceeds 50mm.
Compliance Information
RoHS and REACH compliant per Microchip product environmental information. Lead-free finish supports reflow soldering. Not AEC-Q100 qualified in the 'I' industrial grade shown here; AEC-Q100 qualified automotive variants exist in the PIC16F18855 family with a 'VAO' suffix.
