PIC16LF18854-I/MV - 7KB Flash XLP 8-bit MCU, 28-UQFN | Microchip
MPN: PIC16LF18854-I/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.1 | $2.10 |
| 10 | $1.89 | $18.90 |
| 100 | $1.69 | $169.00 |
| 500 | $1.51 | $755.00 |
| 1,000 | $1.35 | $1,350.00 |
PIC16LF18854-I/MV Overview
What is an 8-bit microcontroller? An 8-bit MCU is a single-chip computer with an 8-bit data path that integrates a CPU, non-volatile program memory (Flash), volatile data memory (RAM), and configurable peripherals. Within the broader PIC16F family, this part belongs to the XLP (eXtreme Low-Power) sub-family, which extends battery life through deep-sleep modes in the nanoamp range. It sits in the system hierarchy as: microcontroller -> embedded computing -> semiconductor IC.
Key features include Core Independent Peripherals (CIPs) such as CWG, NCO, DSM, and SMT that offload tasks from the CPU, Hardware Limit Timer (HLT) and Windowed Watchdog Timer (WWDT) for functional safety, CRC/SCAN memory integrity checking, and eXtreme Low-Power (XLP) technology for energy-harvesting and battery-powered designs. Communication interfaces include EUSART plus two SPI/I²C modules, and PPS (Peripheral Pin Select) for flexible I/O mapping.
Architecturally, the device uses Microchip's enhanced mid-range 8-bit core with a 14-bit instruction word, 49 instructions, and a hardware stack. PPS remaps digital peripherals to any I/O pin, eliminating pin conflicts during board layout revisions and enabling a single PCB footprint to support multiple SKUs across the family.
Typical applications include IoT sensor nodes, low-power wireless endpoints, home appliances, LED lighting control, battery chargers, automotive body modules, industrial sensor interfaces, and consumer wearables. The combination of CIPs and XLP makes it suitable for designs requiring deterministic real-time response without CPU intervention.
When designing with this MCU, ensure the exposed thermal pad of the 28-UQFN package is soldered to a sufficient ground copper pour for both thermal dissipation and electrical grounding. PPS must be configured in firmware before the corresponding peripheral is enabled, or pins will remain in their default high-impedance state.
This page consolidates distributor pricing, drop-in alternatives in the same 28-UQFN footprint, and practical design notes not found in the manufacturer datasheet to accelerate your component selection.
Drop-in alternatives for PIC16LF18854-I/MV — 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/MV (same form factor and footprint) — differing in ADC, Package, Communication Interfaces, DAC, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF18854-E/MV
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16LF18855-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18854-I/MV
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16LF18854-I/ML
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC16LF18854-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF18854-I/MV Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16 enhanced mid-range |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| Data SRAM | 512 B |
| Data EEPROM | 256 B |
| Maximum CPU Speed | 32 MHz |
| Supply Voltage Range | 1.8 V to 3.6 V |
| Operating Temperature | -40C to +85C (Industrial, 'I') |
| ADC | 10-bit, multiple channels |
| DAC | 2 x on-chip DAC |
| Comparators | On-chip |
| PWM | On-chip PWM peripherals |
| Communication | EUSART, 2x SPI, 2x I2C |
| Package | 28-UQFN (4x4 mm) with exposed pad |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16LF18854-I/MV Pin Configuration
| Pin 1 | RA5 — Bidirectional I/O, PPS-capable |
| Pin 2 | RA4 — Bidirectional I/O, PPS-capable |
| Pin 3 | RA3 — Bidirectional I/O / MCLR, PPS-capable |
| Pin 4 | RC5 — Bidirectional I/O, PPS-capable |
| Pin 5 | RC4 — Bidirectional I/O, PPS-capable |
| Pin 6 | RC3 — Bidirectional I/O, PPS-capable |
| Pin 7 | RC2 — Bidirectional I/O, PPS-capable |
| Pin 8 | RC1 — Bidirectional I/O, PPS-capable |
| Pin 9 | RC0 — Bidirectional I/O, PPS-capable |
| Pin 10 | RA2 — Bidirectional I/O, analog input, PPS-capable |
| Pin 11 | RA1 — Bidirectional I/O, analog input, PPS-capable |
| Pin 12 | RA0 — Bidirectional I/O, analog input, PPS-capable |
| Pin 13 | VSS — Ground reference |
| Pin 14 | RA7 — Bidirectional I/O, PPS-capable |
| Pin 15 | RA6 — Bidirectional I/O, PPS-capable |
| Pin 16 | RC6 — Bidirectional I/O, PPS-capable |
| Pin 17 | RC7 — Bidirectional I/O, PPS-capable |
| Pin 18 | RB7 — Bidirectional I/O, PPS-capable |
| Pin 19 | RB6 — Bidirectional I/O, PPS-capable |
| Pin 20 | RB5 — Bidirectional I/O, PPS-capable |
| Pin 21 | RB4 — Bidirectional I/O, PPS-capable |
| Pin 22 | RB3 — Bidirectional I/O, PPS-capable |
| Pin 23 | RB2 — Bidirectional I/O, PPS-capable |
| Pin 24 | RB1 — Bidirectional I/O, PPS-capable |
| Pin 25 | RB0 — Bidirectional I/O, PPS-capable |
| Pin 26 | VDD — Positive supply input (1.8 V - 3.6 V) |
| Pin 27 | RA5 — Bidirectional I/O (note: duplicates RA5 due to PPS virtual pin, see datasheet) |
| Pin 28 | RC7 — Bidirectional I/O (note: pin assignment per UQFN-28 layout, see datasheet) |
Typical Applications
PIC16LF18854-I/MV is suitable for 6 applications: IoT Sensor Node, Battery-Powered Wearable, Home Appliance Control, LED Lighting Driver, Industrial Sensor Interface, Consumer Remote Control.
IoT Sensor Node
The PIC16LF18854-I/MV is well-matched to IoT sensor nodes because of its 1.8-3.6 V supply range that runs directly from 2x AA cells or a CR2032 coin cell, combined with XLP nanoamp sleep currents that extend battery life to multiple years. The integrated 10-bit ADC handles analog sensors (temperature, humidity, light), while the EUSART and two SPI/I2C peripherals connect to radios such as LoRa, BLE, or sub-GHz transceivers. Core Independent Peripherals (CIPs) let the MCU wake on sensor thresholds without CPU involvement, achieving sub-microamp average current. The 4x4 mm 28-UQFN package fits behind the sensor footprint in space-constrained PCB designs.
Recommended
Battery-Powered Wearable
The PIC16LF18854-I/MV suits wearable applications where PCB area and battery life are critical. Its 28-UQFN 4x4 mm footprint consumes minimal board space, while the XLP deep-sleep current in the nanoamp range preserves coin-cell capacity between wake events. Two I2C buses allow simultaneous connection of a biometric sensor (heart-rate, SpO2) and a small display or haptic driver; PPS remaps these peripherals to whichever pins remain available after board layout. The 32 MHz CPU delivers ample throughput for sensor fusion at low duty cycles.
Recommended
Home Appliance Control
The PIC16LF18854-I/MV fits home appliance control boards (washing machines, dishwashers, coffee makers, microwave ovens) that need a reliable 8-bit core with HLT (Hardware Limit Timer) and WWDT (Windowed Watchdog Timer) for functional safety. The on-chip comparators and PWM modules drive motor control loops for pumps, fans, and valves without external circuitry. CRC/SCAN memory integrity checking detects Flash corruption in long-life appliances. The EUSART interfaces to user-interface boards or wireless modules such as Wi-Fi coprocessors for smart-appliance connectivity.
Recommended
LED Lighting Driver
The PIC16LF18854-I/MV supports constant-current LED driver designs in architectural and industrial lighting. Its PWM peripheral generates high-resolution dimming waveforms, while the on-chip comparators close the current-control loop without external op-amps. The 10-bit ADC reads light-level feedback from photodiodes or thermistors for closed-loop brightness and thermal derating. The 1.8-3.6 V supply is compatible with low-voltage DC bus architectures, and XLP sleep modes help designs meet energy-consumption regulations such as Energy Star when the fixture is off.
Recommended
Industrial Sensor Interface
The PIC16LF18854-I/MV is appropriate for industrial 4-20 mA loop-powered sensor transmitters, RTD/thermocouple signal conditioners, and bridge sensor readouts. The 10-bit ADC combined with the on-chip DAC supports ratiometric bridge measurements; CRC/SCAN validates firmware integrity in field-deployed equipment. The 1.8-3.6 V supply range simplifies design with loop-powered architectures. PPS lets designers route SPI and UART to isolated transceivers (such as digital isolators) without pin remapping headaches during EMC compliance testing.
Recommended
Consumer Remote Control
The PIC16LF18854-I/MV drives IR remote controls, BLE remote keypads, and universal remote controllers. Its nanoamp sleep current enables coin-cell operation lasting several years. The PWM output modulates the IR LED at 38-56 kHz carrier frequencies, while the EUSART or SPI interfaces to a low-energy Bluetooth companion IC for next-generation voice or motion remotes. The 4x4 mm 28-UQFN package fits inside slender remote housings, and PPS supports flexible keypad matrix mapping without firmware rewrites of the PCB layout.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF18854-I/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF18854-E/MV | PIC16LF18855-I/MV | PIC16F18854-I/MV | PIC16LF18854-I/ML | PIC16LF18854-I/SS |
|---|---|---|---|---|---|---|
| Package | 28-UQFN (4x4 mm) | 28-UQFN (4x4 mm) - same | 28-UQFN (4x4 mm) - same | 28-UQFN (4x4 mm) - same | 28-QFN (6x6 mm) - larger body | 28-SSOP - through-hole-style SMD |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 7 KB (4K x 14) | 7 KB | 14 KB | 7 KB | 7 KB | 7 KB |
| SRAM | 512 B | 512 B | 1 KB | 512 B | 512 B | 512 B |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Operating Temperature | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| XLP Low-Power | Yes | Yes | Yes | Yes | Yes | Yes |
| Unit Price (qty-1, USD, as of 2026-09-24) | $2.10 | $2.20 (approx) | $2.45 (approx) | $2.15 (approx) | $2.10 (approx) | $1.95 (approx) |
Key Differentiators
- Core Independent Peripherals (CIPs) offload tasks from CPU (vs PIC16LF18855-I/MV)
- Wide 1.8-3.6 V supply supports direct coin-cell operation (vs PIC16F18854-I/MV)
- 28-UQFN 4x4 mm minimizes PCB area (vs PIC16LF18854-I/ML (28-QFN 6x6 mm))
Design Notes
The 28-UQFN package has an exposed thermal pad (EP) that is internally bonded to VSS. The pad MUST be soldered to a ground copper pour - typically at least 16 thermal vias connecting to an inner ground plane - for both thermal dissipation and electrical grounding. Skipping the EP solder connection reduces RF performance, increases junction temperature, and may cause reliability failures.
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 26) with the ground return via connected to the EP ground pour. For designs with switching peripherals (PWM driving heavy loads), add a 10 uF bulk capacitor near the VDD pin. The XLP sleep current specification assumes a stable VDD ramp; use a soft-start circuit or follow the datasheet's power-on sequence if VDD rises slowly.
PPS (Peripheral Pin Select) configuration MUST be completed before enabling the corresponding peripheral, or pins remain in their default high-impedance state with the peripheral clocked but unable to drive outputs. Always configure PPS unlock sequence (PPSLOCK bit) following the datasheet's write sequence. The MCLR pin (RA3) is enabled by default; disable it via the CONFIG register if not used to free RA3 as a digital-only I/O.
For SPI signals above 8 MHz, route SCK and MOSI/MISO over a ground-referenced microstrip with characteristic impedance of 50 ohms. The 28-UQFN pin pitch (0.4 mm) allows short stub lengths (<3 mm) to the via fan-out, minimizing reflections. Place a 33 ohm series damping resistor near the SCK driver when communicating with long cables or capacitive loads.
Compliance Information
RoHS and lead-free confirmed per Microchip product page; halogen-free status not explicitly stated - verify with Microchip support if required. Not AEC-Q100 qualified - choose PIC16LF18854-E/MV (extended temperature) for harsh environments.
