PIC16LF18855T-I/SS - 8-Bit 32MHz MCU 14KB Flash | Microchip
MPN: PIC16LF18855T-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.79 | $1.79 |
| 10 | $1.65 | $16.50 |
| 100 | $1.5 | $150.00 |
| 500 | $1.39 | $695.00 |
| 1,000 | $1.28 | $1,280.00 |
PIC16LF18855T-I/SS Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path and a RISC instruction set. Within the broader hierarchy, the PIC16LF18855 sits as: PIC16 MCU -> 8-bit PIC microcontroller -> microcontroller -> embedded processor -> semiconductor. The PIC16 family is positioned between Microchip's PIC10/PIC12 baseline parts and the PIC18/PIC24 high-performance tiers, making it a workhorse class for cost-sensitive, low-power applications.
Key features of this part include 24-channel 10-bit ADC with automated averaging, 5-bit and 10-bit DAC, complementary output PWMs with independent time bases, multiple serial interfaces (I2C, SPI, UART with LIN support), and up to 25 I/O pins. The CIPs let designers offload tasks like signal conditioning, waveform generation, and timing from the CPU, freeing cycles for application code while reducing power consumption. According to the PIC16(L)F1885X/7X datasheet, the XLP technology delivers sub-uA sleep currents with retention, enabling multi-year coin-cell or energy-harvesting deployments.
Architecturally the device pairs a Harvard RISC core with a 14-bit instruction word and hardware multiplier, executed at 32 MHz for an 8 MIPS peak throughput. The non-volatile memory uses Flash with self-programming support (ICSP) and configurable code protection, while the analog chain integrates op-amps, comparators, and a zero-cross detector so that mixed-signal designs can be built with minimal external components.
Typical applications include low-power IoT sensor nodes, battery-powered handheld instrumentation, LIN-based automotive body controllers, white-goods and appliance control boards, LED lighting controllers, and general-purpose embedded control where low quiescent current and integrated peripherals outweigh raw CPU performance. The wide VDD range also suits USB-C powered accessories and energy-harvesting designs.
When designing with this part, select the internal 32 MHz HFINTOSC when BOM count and standby power matter, and reserve the external crystal for USB-bridge or LIN-physical-layer timing where cycle accuracy is critical. Validate sleep-mode current budgets at your target VDD using the XLP datasheet curves before finalizing battery sizing. This page synthesizes distributor pricing, drop-in package-compatible alternatives, and design considerations not collected on any single manufacturer or distributor page.
Drop-in alternatives for PIC16LF18855T-I/SS — 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 PIC16LF18855T-I/SS (same form factor and footprint) — differing in Package, ADC, Operating Temperature, DAC, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF18855-I/SS
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16LF18855-I/SO
✅ Drop-In✓ In Stock
$1.24 / Unit
View Datasheet →PIC16LF18855-E/SS
✅ Drop-In✓ In Stock
$1.28 / Unit
View Datasheet →PIC16LF18855T-I/ML
✅ Drop-In✓ In Stock
$1.34 / Unit
View Datasheet →PIC16LF18854-I/SO
✅ Drop-In✓ In Stock
$1.63 / Unit
View Datasheet →PIC16LF18855T-I/SS Maximum Ratings & Electrical Characteristics
| Core Processor | PIC |
| Core Size | 8-Bit |
| Core Architecture | RISC, 14-bit instruction word |
| Maximum CPU Speed | 32 MHz (8 MIPS) |
| Program Memory (Flash) | 14 KB (8K x 14) |
| SRAM | 1 KB |
| EEPROM | 256 B |
| Operating Voltage (VDD) | 1.8 V to 3.6 V (LF family) |
| I/O Pins | Up to 25 |
| ADC | 10-bit, up to 24 channels |
| DAC | 5-bit and 10-bit |
| PWM | Multiple complementary outputs, independent time bases |
| Serial Interfaces | I2C, SPI, UART/USART with LIN |
| Core Independent Peripherals | CLC, NCO, CRC/SCAN, HLT, op-amps, comparators |
| XLP (eXtreme Low Power) | Yes, sub-uA sleep with retention |
| Package | 28-SSOP |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (Industrial, "I") |
| Packaging Form | Tape & Reel ("T") |
| RoHS Status | Compliant |
PIC16LF18855T-I/SS Pin Configuration
| Pin 1 | RA0 — PORTA bit 0 / analog input |
| Pin 2 | RA1 — PORTA bit 1 / analog input |
| Pin 3 | RA2 — PORTA bit 2 / analog input |
| Pin 4 | RA3 — PORTA bit 3 / analog input / reference |
| Pin 5 | RA4 — PORTA bit 4 / analog input |
| Pin 6 | RA5 — PORTA bit 5 / analog input |
| Pin 7 | RA6 — PORTA bit 6 / analog input |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA7 — PORTA bit 7 / analog input |
| Pin 10 | RC0 — PORTC bit 0 |
| Pin 11 | RC1 — PORTC bit 1 |
| Pin 12 | RC2 — PORTC bit 2 |
| Pin 13 | RC3 — PORTC bit 3 / SCL |
| Pin 14 | RC4 — PORTC bit 4 / SDA |
| Pin 15 | RC5 — PORTC bit 5 |
| Pin 16 | RC6 — PORTC bit 6 / TX |
| Pin 17 | RC7 — PORTC bit 7 / RX |
| Pin 18 | RE3 — PORTE bit 3 / MCLR |
| Pin 19 | VDD — Positive supply |
| Pin 20 | RA5 — PORTA bit 5 (second mapping reference) |
| Pin 21 | RC0 — PORTC bit 0 (second mapping reference) |
| Pin 22 | OSC2 — Crystal/oscillator output |
| Pin 23 | OSC1 — Crystal/oscillator input |
| Pin 24 | RA0 — PORTA bit 0 (second mapping reference) |
| Pin 25 | RA1 — PORTA bit 1 (second mapping reference) |
| Pin 26 | RA2 — PORTA bit 2 (second mapping reference) |
| Pin 27 | RA7 — PORTA bit 7 / OSC1 alt |
| Pin 28 | RA6 — PORTA bit 6 / OSC2 alt |
Typical Applications
PIC16LF18855T-I/SS is suitable for 6 applications: Battery-Powered IoT Sensor Node, LIN Automotive Body Controller, White Goods Appliance Control Board, LED Lighting Controller, Portable Medical Monitoring Accessory, USB-C Powered Consumer Accessory.
Battery-Powered IoT Sensor Node
The PIC16LF18855T-I/SS fits IoT sensor nodes because its XLP technology delivers sub-uA sleep currents with RAM retention per the Microchip family datasheet. With 14 KB Flash and 1 KB SRAM, designers can run a small RTOS-lite loop or polled state machine for temperature, humidity, or motion sensing. The Core Independent Peripherals (CLC, NCO, CRC/SCAN) keep wake, sample, and transmit sequencing in hardware while the core sleeps, extending coin-cell lifetime to multi-year windows. The 1.8V minimum VDD also lets the device ride directly off a single-cell alkaline or two-cell coin-cell supply without a boost converter.
Recommended
LIN Automotive Body Controller
The PIC16LF18855T-I/SS integrates a UART with LIN hardware support, making it a slave node candidate for LIN-based body electronics like window lifters, mirror adjusters, or seat controllers. The 10-bit ADC with up to 24 channels handles multiple analog sensor inputs (current sense, position feedback) without an external ADC, and the complementary PWMs drive small DC motor bridges directly. The 32 MHz core executes LIN 2.x scheduling and diagnostic routines with margin, while the -40C to +85C industrial temperature range covers cabin environments. Designers should pair this MCU with a TJA1027 LIN transceiver for bus physical-layer compliance.
Recommended
White Goods Appliance Control Board
Appliances like washing machines, dishwashers and refrigerators benefit from the PIC16LF18855T-I/SS's combination of CIPs (CLC, NCO, HLT) and multiple PWMs for motor and valve control. The integrated op-amps and comparators close the loop on triac-controlled AC loads without external analog stages, lowering BOM cost. The 14 KB Flash supports state-machine firmware for sensor-driven cycles, and EEPROM provides 256 bytes of parameter storage for calibration and user settings. The wide 1.8V-3.6V range simplifies 3.3V rail designs where the MCU shares power with Wi-Fi or BLE modules.
Recommended
LED Lighting Controller
The PIC16LF18855T-I/SS drives architectural and accent LED strips using its multiple complementary PWM outputs with independent time bases, allowing smooth color-mixing without external logic. The 10-bit PWM resolution (and the 16-bit PWM via the Capture/Compare module) enables flicker-free dimming curves, and the 10-bit DAC generates analog trim voltages for LED-driver current-set pins. With 1.8V-3.6V operation the MCU runs directly off a buck-converter 3.3V rail, and XLP sleep modes keep standby power below the Energy Star threshold for connected lighting fixtures.
Recommended
Portable Medical Monitoring Accessory
The PIC16LF18855T-I/SS serves as the low-power MCU in portable medical accessories such as pulse oximeter probes, peak-flow meters and wearable thermometers. Its 14 KB Flash and 1 KB SRAM are sufficient for sensor-sampling firmware and BLE/HID stacks linking to a phone, and the integrated 10-bit ADC (24 channels) handles multiple biosensors directly. Sub-uA XLP sleep preserves battery life between readings, and the -40C to +85C range supports clinical and home environments. Designers should follow IEC 60601-1 and IEC 62366-1 usability guidance when this MCU sits in the path of patient-contact devices.
Recommended
USB-C Powered Consumer Accessory
USB-C powered consumer accessories (dongles, hubs, small appliances) can leverage the PIC16LF18855T-I/SS as a monitor/control MCU on the 3.3V rail derived from USB-C VBUS. The integrated I2C/SPI/UART interfaces connect to USB-PD controllers and downstream peripherals, while the 10-bit ADC monitors VBUS current via a sense resistor. The 32 MHz instruction rate is sufficient for USB-C alternate-mode state machines and simple HID interfaces; designers pair the MCU with a USB-PD controller such as the FUSB302. The 1.8V minimum VDD simplifies the 3.3V LDO load budget.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF18855T-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF18855-I/SS | PIC16LF18855-E/SS | PIC16LF18854-I/SO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SOIC - differs |
| Core | 8-bit PIC RISC | 8-bit PIC RISC | 8-bit PIC RISC | 8-bit PIC RISC |
| Maximum CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Program Memory (Flash) | 14 KB | 14 KB | 14 KB | 7 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B |
| Operating Voltage | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V |
| Temperature Range | -40C to +85C (Industrial) | -40C to +85C | -40C to +125C (Extended) | -40C to +85C |
| Packaging Form | Tape & Reel | Tube | Tube | Tube |
Key Differentiators
- Lowest-voltage LF member with full XLP sleep modes (vs PIC16LF18855-I/SS)
- Full industrial temperature window (vs PIC16LF18855-E/SS)
- Higher memory density at same price tier (vs PIC16LF18854-I/SO)
Design Notes
Estimated (typical XLP LF figures from family datasheet): with all peripherals off and the 32 kHz secondary oscillator running, sleep current at 3.3V VDD is on the order of 50-100 nA. Adding ADC retention or BOR pushes this to roughly 1-3 uA. For battery-life calculations use the active current at 32 MHz (~2 mA typical) and scale duty-cycle. Always validate on your BOM at your VDD using a uA-current meter; silicon-to-silicon variation can exceed 2x in deep-sleep.
Place 100 nF decoupling capacitor as close to VDD (pin 19) as practical; add 10 uF bulk on the VDD rail if the design uses PWMs or radio modules. For SSOP-28 keep the ground pin (pin 8) return path short and stitch the GND plane around the MCU body. ICSP programming lines (PGC/PGD) should be routed with <10 cm trace length and 10 kohm pull-up on MCLR per Microchip debug spec.
Don't confuse the LF (1.8V-3.6V) and non-LF (2.3V-5.5V) variants - the PIC16F18855-I/SS does not run below 2.3V. Verify VDD before substituting. The 28-SSOP footprint differs from 28-SOIC; never hand-swap SSOP and SOIC parts without re-laying out the PCB. MCLR must not be left floating - tie through a 10 kohm pull-up to VDD or the device will not exit reset reliably.
Compliance Information
Microchip PIC16LF18855 family parts are RoHS and REACH compliant per distributor product pages. Not AEC-Q100 qualified; for AEC-Q100 automotive applications consult Microchip's automotive-grade PIC16F18855-Q1 variants separately.
