PIC16LF18455-I/SO - 8-Bit 32MHz 14KB Flash MCU | Microchip
MPN: PIC16LF18455-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.66 | $1.66 |
| 10 | $1.49 | $14.90 |
| 100 | $1.32 | $132.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.05 | $1,050.00 |
PIC16LF18455-I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable peripherals. The PIC16LF18455 belongs to the 8-bit PIC16F family of microcontrollers, a sub-category of microcontrollers within integrated circuits. The "LF" prefix denotes the extended eXtreme Low-Power (XLP) variant, supporting 1.8V to 3.6V operation for energy harvesting and battery applications. The "18455" part identifies it as the 28-pin member of the PIC16(L)F184xx family that pairs high-resolution analog with Core Independent Peripherals (CIPs).
Key features include 14KB (8K x 14) self-programmable Flash program memory, 1KB SRAM data memory, 26 I/O pins, two 10-bit PWMs with independent timers, and a 12-bit ADC2 with computation engine and oversampling. Communication peripherals include one EUSART (RS-232/RS-485), one SPI, and one I2C with address masking. The integrated CWG, zero-cross detect, and 5-bit DAC support advanced motor-control and lighting topologies without an external driver.
Architecturally, the PIC16LF18455 employs a 32MHz internal oscillator with 4x PLL, selectable peripheral pin select, Memory Access Partitioning (MAP) for bootloader security, and the Device Information Area (DIA) for unique per-chip calibration data. The CIP-based architecture allows the ADC, PWM, CWG, and communication peripherals to operate without CPU intervention, dramatically reducing power consumption in real-time control loops.
Typical applications include IoT sensor nodes, battery-powered portable instrumentation, LED lighting control, low-end motor control (BLDC, fan), home appliance user interfaces, and industrial sensor conditioning. Its 1.8V minimum supply enables direct connection to single-cell Li-Ion or two-coin-cell alkaline batteries.
When designing, allocate the MAP-protected region early for a bootloader if field updates are required, and use the PPS feature to remap peripherals, freeing pin assignments for PCB routing. For ADC2 + CWG motor applications, follow the datasheet's recommended grounding and decoupling network to minimize PWM-induced digital noise coupling into the analog inputs.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet, giving embedded engineers a single-page reference for PIC16LF18455-I/SO selection, sourcing, and BOM risk planning.
Drop-in alternatives for PIC16LF18455-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 PIC16LF18455-I/SO (same form factor and footprint) — differing in Package, ADC, Low-Power Technology, DAC, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18455-I/SO
✅ Drop-In✓ In Stock
$1.38 / Unit
View Datasheet →PIC16LF18455T-I/SO
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16LF18445-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.15 / Unit
View Datasheet →PIC16LF18345-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.02 / Unit
View Datasheet →PIC16LF18446-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.02 / Unit
View Datasheet →PIC16LF18455-I/SO Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit Microcontroller (MCU) |
| Core | PIC16 (Enhanced Mid-Range) |
| Program Memory | 14 KB Flash (8K x 14 words) |
| Data RAM | 1 KB |
| Data EEPROM | 256 B |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V |
| Number of I/O Pins | 26 |
| ADC | 12-bit ADC2 with Computation |
| DAC | 5-bit DAC |
| PWM Channels | 2 x 10-bit PWM |
| Comparators | 2 |
| Communication Peripherals | 1x EUSART, 1x SPI, 1x I2C |
| Package | 28-pin SOIC (7.50 mm / 0.295" wide) |
| Mounting Type | Surface Mount (SMD/SMT) |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| MSL Level | 1 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
PIC16LF18455-I/SO Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O port A bit 2; analog-capable |
| Pin 2 | RA3 — Bidirectional I/O port A bit 3; analog-capable |
| Pin 3 | RA4 — Bidirectional I/O port A bit 4; analog-capable |
| Pin 4 | RA5 — Bidirectional I/O port A bit 5; analog-capable |
| Pin 5 | RA6 — Bidirectional I/O port A bit 6; analog-capable |
| Pin 6 | RA7 — Bidirectional I/O port A bit 7; analog-capable |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RA1 — Bidirectional I/O port A bit 1; analog-capable |
| Pin 9 | RA0 — Bidirectional I/O port A bit 0; analog-capable |
| Pin 10 | RA4 — Bidirectional I/O port A bit 4 (shared bond) |
| Pin 11 | VDD — Positive supply voltage (1.8V to 3.6V) |
| Pin 12 | VSS — Ground reference (alternate) |
| Pin 13 | RB7 — Bidirectional I/O port B bit 7; ICSP programming clock |
| Pin 14 | RB6 — Bidirectional I/O port B bit 6; ICSP programming data |
| Pin 15 | RB5 — Bidirectional I/O port B bit 5; analog-capable |
| Pin 16 | RB4 — Bidirectional I/O port B bit 4; analog-capable |
| Pin 17 | RB3 — Bidirectional I/O port B bit 3; analog-capable |
| Pin 18 | RB2 — Bidirectional I/O port B bit 2; analog-capable |
| Pin 19 | RB1 — Bidirectional I/O port B bit 1; analog-capable, ICSPCLK |
| Pin 20 | RB0 — Bidirectional I/O port B bit 0; analog-capable, INT input |
| Pin 21 | RC0 — Bidirectional I/O port C bit 0 |
| Pin 22 | RC1 — Bidirectional I/O port C bit 1 |
| Pin 23 | RC2 — Bidirectional I/O port C bit 2 |
| Pin 24 | RC3 — Bidirectional I/O port C bit 3 |
| Pin 25 | RC4 — Bidirectional I/O port C bit 4 |
| Pin 26 | RC5 — Bidirectional I/O port C bit 5 |
| Pin 27 | RC6 — Bidirectional I/O port C bit 6 |
| Pin 28 | RC7 — Bidirectional I/O port C bit 7 |
Typical Applications
PIC16LF18455-I/SO is suitable for 7 applications: Battery-Powered IoT Sensor Node, LED Lighting Controller, Low-End BLDC Motor Control, Industrial Sensor Conditioning, Home Appliance User Interface, Portable Health Monitoring Device, Smart Sensor Hub with SPI/I2C Bridge.
Battery-Powered IoT Sensor Node
The PIC16LF18455-I/SO fits battery-powered IoT sensor nodes because its 1.8V minimum supply enables direct operation from a single-cell Li-Ion battery down to 2.0V cut-off, while the XLP nanoWatt sleep mode drops current below 50 nA typical per the Microchip datasheet (DS40002038C). The 14KB Flash supports TCP/IP or LoRaWAN protocol stacks, and the 12-bit ADC2 with computation engine can perform oversampling on-board to reduce noise on environmental sensor readings. The I2C bus connects directly to low-power sensors, while EUSART supports modem wake-up. Designers can replace the LF with the F variant only if the supply stays above 2.3V, making the LF the safer default.
Recommended
LED Lighting Controller
The PIC16LF18455-I/SO suits LED lighting controllers because the integrated 12-bit ADC2 reads ambient light sensors and potentiometer dimmers, while the two 10-bit PWMs plus Complementary Waveform Generator (CWG) drive high-side/low-side MOSFETs for non-isolated buck or boost LED topologies per the Microchip datasheet. The CWG eliminates software dead-time overhead by generating hardware-based dead-band delays, reducing CPU load and EMI. The 5-bit DAC enables current-setpoint calibration without external trim components. For 1.8V supply operation, the LF variant supports direct battery backup for emergency lighting controllers, while peripheral pin select (PPS) lets the PCB re-route PWM outputs to any chosen pin.
Recommended
Low-End BLDC Motor Control
The PIC16LF18455-I/SO enables low-end BLDC motor control because its 32MHz core executes sensor-less back-EMF or Hall-effect sensor commutation loops within tight 50us cycle times, while the CWG generates dead-time-correct complementary PWM outputs that directly drive 3-phase MOSFET bridges per the Microchip datasheet. The two comparators detect zero-cross events on the back-EMF signal, avoiding external op-amps, and the ADC2 with computation engine handles current sensing and over-current protection. The 14KB Flash supports field-tuned speed/PI control loops, while the EUSART provides a debug/configuration channel for in-field motor tuning via RS-485.
Recommended
Industrial Sensor Conditioning
The PIC16LF18455-I/SO fits industrial sensor conditioning because the 12-bit ADC2 with computation engine supports on-chip oversampling (16x to 64x), reducing effective noise below 50 uV-RMS for thermocouple and strain-gauge bridges per the Microchip datasheet (DS40002038C). The MAP feature secures calibration constants in protected Flash regions to prevent field corruption, while the EUSART (RS-485) interfaces with industrial fieldbuses (Modbus RTU). For 4-20 mA loop-powered sensors, the LF variant's 1.8V minimum supply allows it to operate directly from the loop with a small linear regulator. The 26 I/O pins handle digital inputs, keypad scanning, and parallel sensor multiplexing.
Recommended
Home Appliance User Interface
The PIC16LF18455-I/SO powers home appliance user interfaces because its 14KB Flash stores multi-language menu strings and its 26 I/O pins drive up to 7-segment displays, keypads, and LED status indicators per the Microchip family datasheet. The integrated comparators debounce mechanical switches, while the EUSART communicates with the main appliance controller for parameter passing. The LF variant supports 1.8V LCD bias rails for low-power segment displays, and peripheral pin select (PPS) allows the PCB designer to relocate display segment lines for routing flexibility. Watchdog timer, BOR, and MAP boot regions provide the robustness required for unattended appliance deployment.
Recommended
Portable Health Monitoring Device
The PIC16LF18455-I/SO fits portable health monitoring devices because its XLP nanoWatt sleep current below 50 nA typical extends battery life in spot-check wearables, while the 12-bit ADC2 with computation engine handles ECG/EMG bio-signal acquisition with hardware-accelerated averaging per the Microchip datasheet. The I2C bus connects to optical heart-rate, temperature, and SpO2 sensor modules, and the 5-bit DAC calibrates analog front-end bias. The 14KB Flash stores algorithm code and calibration tables, while the EEPROM holds patient logs. Designers can leverage peripheral pin select (PPS) to assign SPI/I2C to any pins for compact PCB layout.
Recommended
Smart Sensor Hub with SPI/I2C Bridge
The PIC16LF18455-I/SO acts as a smart sensor hub because its simultaneous I2C and SPI peripherals bridge legacy 3.3V sensor buses to host processors over UART or RS-485, with 14KB Flash supporting custom protocol translation per the Microchip datasheet. The 12-bit ADC2 with computation engine filters noise on sensor output lines, and the CWG generates a watchdog trigger pulse if the host bus stalls. The 26 I/O pins multiplex multiple slave devices, and the MAP feature secures the bridge firmware against field tampering. With 1.8V operation, the LF variant suits battery-backed sensor hubs that need to retain clock state during sleep.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF18455-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18455-I/SO | PIC16LF18455T-I/SO | PIC16LF18445-I/SO | PIC16LF18345-I/SO | PIC16LF18446-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (7.50mm) | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same |
| Operating Voltage | 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 | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Program Memory (Flash) | 14 KB | 14 KB | 14 KB | 8 KB | 8 KB | 28 KB |
| Data RAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB |
| ADC | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 10-bit ADC | 12-bit ADC2 |
| PWM Channels | 2 x 10-bit | 2 x 10-bit | 2 x 10-bit | 2 x 10-bit | 2 x 10-bit | 2 x 10-bit |
| CWG Peripheral | Yes | Yes | Yes | Yes | Yes | Yes |
| Max CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
Key Differentiators
- Lowest minimum voltage in 28-SOIC PIC16 family with full ADC2 (vs PIC16F18455-I/SO)
- Larger Flash than predecessors (vs PIC16LF18345-I/SO)
- Smaller package code density advantage (vs PIC16LF18446-I/SO)
Design Notes
The PIC16LF18455-I/SO features XLP nanoWatt sleep current below 50 nA typical per the Microchip datasheet (DS40002038C), but this is only achieved when all peripherals are disabled, ADC2 is off, and the WDT is configured for the slowest interval. Decouple each VDD/VSS pair with a 0.1 uF X7R ceramic capacitor placed within 3 mm of the pin. For battery applications, route high-current traces away from the VDD pin to avoid ground bounce-induced BOR resets.
Place the ICSP programming header (RB6/RB7/MCLR/VSS/VDD) on the PCB so that in-circuit programming can be performed without removing the chip. The Microchip datasheet recommends adding a 10 kohm pull-up on MCLR to avoid spurious resets during power ramp. For analog applications, isolate digital return currents from analog VSS using a star-ground topology to minimize ADC2 reading noise. The exposed-pad version is not present on the SOIC package - the 28-SOIC dissipates heat through the SOIC lead frame.
Do not exceed 3.6 V on the VDD pin of the PIC16LF18455-I/SO; the LF variant is NOT 5V tolerant. Although the PIC16F18455-I/SO is a drop-in alternative that handles 5V, swapping between the two requires verifying your regulator. Also, the 14KB Flash is mapped as 8K x 14 words - never assume byte-addressable memory. When using the MAP boot feature, allocate the boot region at the start of firmware development to avoid linker conflicts.
The 28-SOIC package has a thermal resistance theta_JA of approximately 80 C/W per the Microchip packaging specification. At 32 MHz active core and 3.6V supply, the active current is typically 8 mA, so power dissipation is approximately 29 mW - well within the 1W SOIC rating. Estimated: maximum junction temperature rise above 25 C ambient is 80 C/W x 29 mW = 2.3 C, so no heatsink is required. No thermal shutdown is built into the chip; the user firmware should monitor the internal temperature indicator for protection.
Compliance Information
RoHS compliant per Microchip product page. Industrial grade - not AEC-Q100 qualified. For automotive applications use PIC16LF18455-I/SO in production modules after additional environmental qualification testing.
