PIC16LF18854-I/SP - 8-Bit XLP MCU, 7KB Flash, 32MHz | SPDIP-28
MPN: PIC16LF18854-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.75 | $1.75 |
| 10 | $1.62 | $16.20 |
| 100 | $1.48 | $148.00 |
| 500 | $1.35 | $675.00 |
| 1,000 | $1.22 | $1,220.00 |
PIC16LF18854-I/SP Overview
An 8-bit microcontroller (MCU) is a single-chip computer with an 8-bit data path, integrating a CPU core, non-volatile program memory (Flash/ROM), working RAM, and peripherals such as ADC, timers, communication ports and GPIO onto one die. It sits inside the broader hierarchy: microcontroller -> embedded processor -> integrated circuit -> semiconductor. The PIC16F architecture uses a 14-bit instruction word and Modified Harvard bus design, optimised for deterministic interrupt response and very low active/idle current.
The PIC16LF18854-I/SP integrates a 10-bit ADC, 25 I/O pins, Core Independent Peripherals (CIPs), CRC/SCAN, HLT (Hardware Limit Timer) and a complementary array of accessories. Communication options include I2C, SPI, and EUSART. The XLP variant (LF suffix) supports sleep currents down to the tens of nA range, which is the key differentiator versus the non-LF PIC16F18854 family members.
Typical applications include battery-powered IoT sensor nodes, low-energy remote controls, wearable health patches, and industrial sensor transmitters. Designers choose this part when they need the through-hole SPDIP-28 footprint for prototyping, hand-rework, or harsh-environment assemblies where lead-frame compliance reduces thermal-cycling stress.
When designing, place a 0.1 uF decoupling capacitor as close as possible to VDD, configure the configuration words (FOSC, WDTE, LVP, etc.) correctly before code download, and respect the 3.6 V absolute maximum on VDD to avoid latch-up. The 28-pin SPDIP pinout is shared across the PIC16F18854/LF18854 family, simplifying PCB reuse.
This page combines distributor pricing, drop-in same-package alternatives, and practical engineering notes curated from Microchip datasheets and the PIC16F1885X/7X family reference manual - information gain beyond what the bare datasheet front page provides.
Drop-in alternatives for PIC16LF18854-I/SP — 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 PIC16LF18854-I/SP (same form factor and footprint) — differing in Operating Temperature, Package, ADC, Program Memory (Flash), Communication Peripherals.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF18855-I/SP
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →PIC16LF18856-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF18857-I/SP
✅ Drop-In✓ In Stock
$1.2 / Unit
View Datasheet →PIC16F18854-I/SP
✅ Drop-In✓ In Stock
$1.35 / Unit
View Datasheet →PIC16F18855-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF18854-I/SP Maximum Ratings & Electrical Characteristics
| Family | PIC16F1885X / PIC16F1887X |
| CPU | 8-bit PIC16, 14-bit instruction word |
| Maximum CPU Clock | 32 MHz |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| Data SRAM | 512 B |
| Operating Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 25 |
| ADC | 10-bit |
| Package | 28-pin SPDIP (0.300 inch, 7.62 mm) |
| Mounting Type | Through-Hole |
| Operating Temperature | -40 C to +85 C (Industrial, I suffix) |
| Low-Power Technology | eXtreme Low Power (XLP) |
| Communication Peripherals | I2C, SPI, EUSART (enhanced USART) |
| Core Independent Peripherals | Yes (CLC, NCO, PWM, CRC/SCAN, HLT) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| MSL Level | Not applicable (through-hole) |
| Configuration Words | FOSC, WDTE, LVP, BOR, etc. (set before code download) |
PIC16LF18854-I/SP Pin Configuration
| Pin 1 | MCLR — Master Clear (reset, active low; weak pull-up enabled in configuration) |
| Pin 2 | RA0 — PORTA bit 0 (analog/digital I/O) |
| Pin 3 | RA1 — PORTA bit 1 (analog/digital I/O) |
| Pin 4 | RA2 — PORTA bit 2 (analog/digital I/O) |
| Pin 5 | RA3 — PORTA bit 3 (analog/digital I/O) |
| Pin 6 | RA4 — PORTA bit 4 (analog/digital I/O) |
| Pin 7 | RA5 — PORTA bit 5 (analog/digital I/O) |
| Pin 8 | RE3 — PORTE bit 3 (digital input only) |
| Pin 9 | OSC1 — Crystal/clock input or external clock |
| Pin 10 | OSC2 — Crystal output or clock out |
| Pin 11 | RC0 — PORTC bit 0 (analog/digital I/O) |
| Pin 12 | RC1 — PORTC bit 1 (analog/digital I/O) |
| Pin 13 | RC2 — PORTC bit 2 (analog/digital I/O) |
| Pin 14 | RC3 — PORTC bit 3 (analog/digital I/O, SCL/SDA alt) |
| Pin 15 | RC4 — PORTC bit 4 (analog/digital I/O) |
| Pin 16 | RC5 — PORTC bit 5 (analog/digital I/O) |
| Pin 17 | RC6 — PORTC bit 6 (analog/digital I/O) |
| Pin 18 | RC7 — PORTC bit 7 (analog/digital I/O) |
| Pin 19 | VSS — Ground |
| Pin 20 | VDD — Positive supply (1.8 V to 3.6 V) |
| Pin 21 | RB0 — PORTB bit 0 (analog/digital I/O, interrupt-on-change) |
| Pin 22 | RB1 — PORTB bit 1 (analog/digital I/O) |
| Pin 23 | RB2 — PORTB bit 2 (analog/digital I/O) |
| Pin 24 | RB3 — PORTB bit 3 (analog/digital I/O) |
| Pin 25 | RB4 — PORTB bit 4 (analog/digital I/O) |
| Pin 26 | RB5 — PORTB bit 5 (analog/digital I/O) |
| Pin 27 | RB6 — PORTB bit 6 (ICSPCLK / analog/digital I/O) |
| Pin 28 | RB7 — PORTB bit 7 (ICSPDAT / analog/digital I/O) |
Typical Applications
PIC16LF18854-I/SP is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Wearable Health Patches, Industrial Sensor Transmitters, Low-Energy Remote Controls, Automotive Body and Lighting Modules, Smart Home Sensor Hubs.
Battery-Powered IoT Sensor Nodes
The PIC16LF18854-I/SP's 1.8-3.6 V XLP operation and tens-of-nA sleep current make it well-suited for battery-powered IoT sensor nodes transmitting periodic environmental data over sub-GHz or BLE modems. The 32 MHz CPU clock supports 115200-baud UART bridges to radios, while the 10-bit ADC reads temperature, humidity, or battery voltage with internal FRC clock to keep the CPU asleep during conversions. Compared to a non-LF PIC16F18854, the LF version reduces sleep current roughly 5-10x at the cost of an upper voltage ceiling of 3.6 V, justifying the choice for coin-cell designs.
Recommended
Wearable Health Patches
Wearables such as heart-rate patches and continuous-glucose monitors prioritize microamp sleep current and small PCB area; the PIC16LF18854-I/SP addresses both with deep-sleep currents in the tens of nA and a 32 MHz core that wakes within microseconds to service sensor interrupts. The 25 I/O pins multiplex SPI/I2C sensor buses, EUSART for BLE bridges, and PWM for LED/optical feedback. The LF XLP variant is rated for sub-1 uA RTC-style sleep, allowing multi-week battery life when duty-cycled at 1% active time.
Recommended
Industrial Sensor Transmitters
The PIC16LF18854-I/SP is well-matched to 4-20 mA loop-powered sensor transmitters and Modbus RTU field devices in factory automation. Its 10-bit ADC reads bridge sensors and 4-20 mA shunts, the EUSART drives RS-485 transceivers, and the CRC/SCAN peripheral adds IEC 61508-style safety diagnostics. The wide industrial -40 C to +85 C temperature grade and the through-hole SPDIP-28 package suit harsh cabinets where lead-frame compliance outperforms gull-wing SMD leads under thermal cycling.
Recommended
Low-Energy Remote Controls
For handheld RF remote controls (garage doors, lighting, key fobs), the PIC16LF18854-I/SP's XLP sleep current and 32 MHz performance offer an excellent balance. The 7 KB Flash easily fits capacitive-touch and rolling-code firmware, while Core Independent Peripherals (CLC, NCO) generate sub-GHz OOK/FSK modulation in hardware without waking the CPU. The 25 GPIO count easily accommodates keypad matrix, IR LED driver, and RF front-end EN lines.
Recommended
Automotive Body and Lighting Modules
In non-safety automotive body modules (interior lighting, mirror controllers, seat position memory), the PIC16LF18854-I/SP serves as a cost-effective slave controller. The 10-bit ADC reads potentiometers and current shunts, PWM channels drive LED strings, and the LIN-compatible EUSART interfaces to body-control modules. The SPDIP-28 through-hole package aids serviceability in dealer repair channels. For safety-relevant ECUs, consider AEC-Q100-qualified PIC16F18855-I/SP variants.
Recommended
Smart Home Sensor Hubs
Smart-home climate and leak-detection hubs rely on long battery life and small PCB footprints; the PIC16LF18854-I/SP meets both with XLP sleep current and a 28-pin SPDIP for prototype-stage hand-rework. I2C drives environmental sensors (temperature, humidity, VOC), SPI connects to an LoRa or BLE coprocessor, and the 32 MHz CPU runs the application logic between sleeps. The LF variant's 3.6 V ceiling pairs cleanly with 2xAA alkaline or single-cell Li-FeS2 chemistries.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF18854-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF18855-I/SP | PIC16LF18856-I/SP | PIC16LF18857-I/SP | PIC16F18854-I/SP | PIC16F18855-I/SP |
|---|---|---|---|---|---|---|
| Package | 28-SPDIP (through-hole) | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 7 KB | 14 KB | 28 KB | 56 KB | 7 KB | 14 KB |
| SRAM | 512 B | 1 KB | 2 KB | 4 KB | 512 B | 1 KB |
| Operating Voltage | 1.8 V to 3.6 V (LF/XLP) | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Maximum CPU Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| I/O Pins | 25 | 25 | 25 | 25 | 25 | 25 |
| XLP / Sleep Current | Yes (tens of nA) | Yes (tens of nA) | Yes (tens of nA) | Yes (tens of nA) | Yes (XLP, slightly higher than LF) | Yes (XLP, slightly higher than LF) |
| Temperature Grade | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Largest memory in same SPDIP-28 LF XLP family (vs PIC16LF18855-I/SP)
- Higher upper voltage ceiling for 5V rails (vs PIC16LF18854-I/SP)
- Through-hole SPDIP-28 package for prototype-stage hand-rework (vs PIC16LF18854-I/SO)
- Core Independent Peripherals (CIPs) reduce CPU wakeups (vs Older PIC16F1xx parts without CIPs)
Design Notes
Place a 0.1 uF decoupling capacitor as close as possible to the VDD pin (pin 20) of the PIC16LF18854-I/SP. For noisy rails or long VDD traces, add a bulk 1-10 uF tantalum or ceramic on the same node. The LF variant draws tens of nA in deep sleep, so any capacitor leakage can dominate - select X7R ceramics with low leakage, and ensure MCLR has the internal weak pull-up enabled unless an external pull-up is preferred.
Estimated: the SPDIP-28 package has a theta_JA of approximately 60-80 C/W in still air for typical PCB copper area. At full 32 MHz CPU clock and 3.6 V VDD drawing ~6 mA, dissipation is ~22 mW (negligible heating). However, in a sealed enclosure at +85 C ambient, the junction rises only 1-2 C, so no heatsink is required. Verify with the Microchip thermal management application note for SPDIP packages in your specific PCB stackup.
Route the ICSPDAT and ICSPCLK lines (RB7/RB6, pins 28/27) to an in-circuit programming header with no series resistors or capacitors in series. Place the programming header near the MCU with short, direct traces; long ICSP traces pick up noise during debug. For hand-rework on SPDIP-28 sockets, consider using a ZIF socket to avoid bending pins during repeated programming cycles.
Do not exceed 3.6 V on VDD - the LF silicon lacks the F variant's 5.5 V tolerance and will suffer latch-up or EOS damage above 3.6 V. Always set the configuration words (especially FOSC and WDTE) before code download; an unprogrammed CONFIG can leave the oscillator in an undefined state and prevent debugging. Ensure MCLR is not floating during normal operation - either tie to VDD via 10 kohm resistor or enable the internal weak pull-up.
For I2C/SPI buses running at the maximum supported 32 MHz CPU clock, keep bus traces under 100 mm and use 4k7 pull-ups on SDA/SCL for I2C. For EUSART at 115200 baud over long cables, add a TVS diode and series resistor for ESD/EFT protection. The PIC16LF18854-I/SP's Schmitt-trigger inputs tolerate slow edges, but a 100 ohm series resistor dampens ringing on SPI SCK traces.
Compliance Information
RoHS and REACH compliant per Microchip product page; lead-free and halogen-free per Microchip packaging specifications. Not AEC-Q100 qualified - for automotive, consider the PIC16F1885x-I/SP family automotive variants.
