PIC16LF18854T-I/SO - 8-bit XLP MCU, 7KB Flash, 28-SOIC | Microchip
MPN: PIC16LF18854T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.79 | $1.79 |
| 10 | $1.62 | $16.20 |
| 100 | $1.4 | $140.00 |
| 500 | $1.2 | $600.00 |
| 1,000 | $1.05 | $1,050.00 |
PIC16LF18854T-I/SO Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path - it executes instructions one byte at a time and serves as the embedded brain of countless consumer, industrial, and IoT products. Low-power 8-bit MCUs sit in the broader power management and embedded system hierarchy: MCU -> microcontroller -> embedded processor -> semiconductor. The PIC16LF18854 belongs to Microchip's enhanced mid-range family (XLP), combining a 32 MHz internal oscillator, 256 bytes of EEPROM, 10-bit ADC with computation, and Core Independent Peripherals (CIP) for autonomous analog/mixed-signal tasks.
Key features include 256B EEPROM, a 10-bit ADC2 module with computation, Peripheral Pin Select (PPS) for flexible signal routing, an EUSART plus two SPI/I2C interfaces, and the XLP suite (IDLE/DOZE/SLEEP modes, <50 nA sleep current typical on the family). PPS lets designers reassign peripheral I/O to nearly any pin, simplifying PCB layout versus fixed-pinout MCUs. The 7KB Flash self-programmable memory supports in-application updates via the device's bootloader-friendly architecture.
The device integrates a configurable logic cell (CLC), numerically controlled oscillator (NCO), 16-bit PWM, complementary waveform generator (CWG) and zero-cross detect (ZCD) peripherals - all core-independent, meaning timers and state machines run without CPU intervention. This offloads latency-critical work from the 32 MHz CPU and reduces average power consumption in battery applications.
Typical applications include battery-powered sensor nodes (XLP sleep draws microamps), home appliances with user interfaces, low-cost motor control loops, lighting controls, and general-purpose embedded control in industrial, consumer, and white-goods products. The 28-SOIC footprint gives ample I/O for human-machine interfaces and segment displays.
When designing with the PIC16LF18854, take advantage of PPS to optimize PCB routing early: assign I2C/SPI to convenient pins near external sensors, then lock the configuration. Always de-couple VDD with a 0.1uF X7R ceramic placed within 5 mm of the pin, and reserve an ICSP header on the schematic for in-circuit programming.
This page synthesizes distributor pricing, drop-in replacement candidates, and practical design notes that go beyond the manufacturer datasheet, giving engineers a complete side-by-side procurement and engineering reference.
Drop-in alternatives for PIC16LF18854T-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 PIC16LF18854T-I/SO (same form factor and footprint) — differing in ADC, Package, Core Architecture, DAC, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF18854-I/SO
✅ Drop-In✓ In Stock
$1.63 / Unit
View Datasheet →PIC16LF18854-E/SO
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →PIC16F18854-I/SO
✅ Drop-In✓ In Stock
$0.82 / Unit
View Datasheet →PIC16LF18855-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.24 / Unit
View Datasheet →PIC16LF18856-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF18854T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 Enhanced Mid-Range (8-bit) |
| Family | PIC16(L)F1885x |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| EEPROM | 256 B |
| CPU Speed (max) | 32 MHz |
| ADC | 10-bit ADC2 with computation |
| Communication Interfaces | EUSART, 2x SPI, 2x I2C |
| Peripheral Pin Select (PPS) | Yes |
| Core Independent Peripherals | CLC, NCO, CWG, ZCD, 16-bit PWM |
| Low-Power Features | XLP - eXtreme Low Power, Sleep/Idle/Doze |
| Package | 28-SOIC (0.295", 7.50 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40C to +85C (Industrial grade, -I) |
| RoHS Status | Compliant |
PIC16LF18854T-I/SO Pin Configuration
| Pin 1 | RA3/MCLR#/VPP — Digital I/O / Master Clear (reset) / Programming voltage |
| Pin 2 | RA0 — Digital I/O / ICSPDAT / AN0 |
| Pin 3 | RA1 — Digital I/O / ICSPCLK / AN1 |
| Pin 4 | RA2 — Digital I/O / AN2 |
| Pin 5 | RA4 — Digital I/O / SOSCO (secondary oscillator) |
| Pin 6 | RA5 — Digital I/O / SOSCI / VCAP |
| Pin 7 | RA6 — Digital I/O / CLKOUT |
| Pin 8 | RC0 — Digital I/O / SOSCO alt / PWM |
| Pin 9 | RC1 — Digital I/O / SOSCI alt |
| Pin 10 | RC2 — Digital I/O / T0CKI |
| Pin 11 | RB4 — Digital I/O / SDA |
| Pin 12 | RB5 — Digital I/O / RX/DT |
| Pin 13 | RB6 — Digital I/O / TX/CK / ICSPCLK |
| Pin 14 | RB7 — Digital I/O / ICSPDAT |
| Pin 15 | RC6 — Digital I/O / SS (SPI slave select) |
| Pin 16 | RC7 — Digital I/O / SDO (SPI) |
| Pin 17 | RA7 — Digital I/O / CLKIN |
| Pin 18 | RC3 — Digital I/O / SCL (I2C) |
| Pin 19 | RC4 — Digital I/O / SDA (I2C) |
| Pin 20 | RC5 — Digital I/O / SDI (SPI) |
| Pin 21 | RC5 — Digital I/O (alternate function duplicates per datasheet) |
| Pin 22 | AVSS — Analog ground for ADC |
| Pin 23 | AVDD — Analog supply for ADC |
| Pin 24 | RB0 — Digital I/O / INT / AN12 |
| Pin 25 | RB1 — Digital I/O / AN10 |
| Pin 26 | RB2 — Digital I/O / AN8 |
| Pin 27 | RB3 — Digital I/O / AN9 |
| Pin 28 | VSS — Digital ground |
Typical Applications
PIC16LF18854T-I/SO is suitable for 6 applications: Battery-Powered IoT Sensor Node, Home Appliance User Interface, Low-Cost BLDC Motor Control, Lighting Control / Dimmable LED Driver, Industrial Sensor Transmitter, Wearable Health Monitor.
Battery-Powered IoT Sensor Node
The PIC16LF18854T-I/SO is a strong fit for battery-powered IoT sensor nodes because its eXtreme Low Power (XLP) peripherals deliver sub-microamp sleep currents, extending coin-cell lifetime to multi-year spans. The 32 MHz CPU wakes quickly to take ADC2 readings, while Core Independent Peripherals (CLC, NCO, CWG) handle timing and signal-conditioning tasks without CPU intervention - lowering average current. With PPS flexibility and the 28-SOIC footprint, designers can route I2C/SPI to nearby sensors on dense PCBs. Putting this MCU between a sensor and a low-power radio such as the SX1276 yields a robust sensor node.
Recommended
Home Appliance User Interface
For washing machines, ovens, and other home appliances, the PIC16LF18854T-I/SO drives segment LCD or LED indicators, reads capacitive touch or rotary encoder inputs, and controls relay/SSR switching. The EUSART links to a Wi-Fi/BT module for cloud connectivity, while the 10-bit ADC2 monitors temperature/load current with computation averaging. PPS lets designers place RC pins near the rotary encoder header without PCB re-routing. Its industrial temperature grade (-40C to +85C) meets appliance operating ranges.
Recommended
Low-Cost BLDC Motor Control
The PIC16LF18854T-I/SO handles small BLDC and PMSM motor control loops using the Complementary Waveform Generator (CWG) and 16-bit PWM modules - all core-independent, offloading the 32 MHz CPU. ADC2 samples back-EMF or current-sense amplifier output while the CPU runs the commutation table; this reduces software jitter and keeps torque ripple low. For 3-phase motors in fans, pumps, or small appliances the part offers a cost-effective single-chip solution with hardware overcurrent protection.
Recommended
Lighting Control / Dimmable LED Driver
The PIC16LF18854T-I/SO suits commercial and residential lighting controllers where Zero-Cross Detect (ZCD) synchronizes dimming to AC mains cycles. Its 16-bit PWM generates smooth dim curves, while Core Independent Peripherals offload phase control - the CPU commands the dim level rather than toggling each zero-cross event. ADC2 monitors supply current and temperature via an NTC. Paired with an NCP1371 or similar LED driver, the PIC MCU delivers flicker-free 0-100 percent dimming.
Recommended
Industrial Sensor Transmitter
For 4-20 mA industrial sensor transmitters, the PIC16LF18854T-I/SO conditions an analog input through ADC2 with computation (oversampling, averaging), linearizes via piecewise lookup in 7KB Flash, and drives an XTR116 or similar current loop transmitter via PWM-filtered DAC. PPS allows the loop driver to share pins with the diagnostic UART. Industrial temperature grade (-40C to +85C) plus 256-byte EEPROM for calibration data makes it ideal for harsh-environment sensor heads.
Recommended
Wearable Health Monitor
The PIC16LF18854T-I/SO fits compact wearable designs through the 7KB Flash running R-R interval detection, the EUSART streaming heart-rate data to a phone over BLE, and the wide VDD range supporting single 1.8V LIPO operation. The CIP peripherals run sampling in deep sleep, drawing nanoamps when idle. ADC2 computation oversamples at low current, enabling ECG-class frontend pairs like the AD8232 to feed the PIC device directly.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF18854T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF18854-I/SO | PIC16LF18854-E/SO | PIC16F18854-I/SO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC |
| Program Memory (Flash) | 7 KB | 7 KB | 7 KB | 7 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B |
| CPU Speed (max) | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C |
| ADC | 10-bit ADC2 | 10-bit ADC2 | 10-bit ADC2 | 10-bit ADC2 |
| Communication | EUSART + 2xSPI + 2xI2C | EUSART + 2xSPI + 2xI2C | EUSART + 2xSPI + 2xI2C | EUSART + 2xSPI + 2xI2C |
| Peripheral Pin Select (PPS) | Yes | Yes | Yes | Yes |
Key Differentiators
- Tape-and-reel packaging suited for SMT assembly (vs PIC16LF18854-I/SO)
- Industrial temperature grade matches typical sensor applications (vs PIC16LF18854-E/SO)
- XLP full low-voltage support down to 1.8V (vs PIC16F18854-I/SO)
Design Notes
Estimate: assuming VDD=3.3V and CPU active 25 percent duty in a sensor-node loop with ADC2 sampling every 100 ms, average current with XLP sleep draws roughly 100uA range (deep sleep <1uA). Decouple VDD with 0.1uF X7R within 5 mm of pin 27/28 plus a 10uF bulk on each AVSS/AVDD pair. Place ferrite bead or 10ohm resistor between digital VDD and AVDD for ADC noise isolation.
The PIC16LF18854T-I/SO ships from -I/SO and -T/-I/SO variants. Mixing -E (extended temp) parts with -I (industrial) parts in a single reel violates traceability. Always confirm ordering code: PIC16LF18854T-I/SO = tape-and-reel, industrial temp, 28-SOIC. Add pin-1 indicator to schematic and inspect first article for orientation - SOIC-28 has the dot near pin 1 but is sometimes confused with the SOIC-16 variant on crowded reels.
Reserve an ICSP header (ICSPDAT, ICSPCLK, MCLR#, VDD, VSS) on the PCB even if shipped without firmware, since PICs cannot be programmed by JTAG. For PPS flexibility, keep all RC pins accessible (avoid using them as power or ground). Use a 100kohm pull-up on MCLR# (reset) and a series resistor of ~470 ohm on the ICSP clock pin for debug isolation. Place the 32 kHz crystal (secondary oscillator) components close to RA4/RA5 if used.
Compliance Information
RoHS and REACH compliance per Microchip product page. Industrial temperature grade (PIC16LF18854T-I/SO) is not AEC-Q100 qualified - choose automotive-grade PIC16F18854-E/SO equivalent for AEC-Q100 requirements.
