PIC16LF18455-I/SS - 14KB Flash 8-bit MCU, 32MHz XLP | Microchip
MPN: PIC16LF18455-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.47 | $2.47 |
| 10 | $2.28 | $22.80 |
| 100 | $2.05 | $205.00 |
| 500 | $1.85 | $925.00 |
| 1,000 | $1.65 | $1,650.00 |
| 3,000 | $1.45 | $4,350.00 |
PIC16LF18455-I/SS Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, optimised for deterministic real-time control with very low power draw. The PIC16LF18455 belongs to the broader hierarchy: microcontroller -> embedded controller -> semiconductor IC. Within Microchip's portfolio, it sits in the PIC16F XLP family, a sub-family distinguished by eXtreme Low-Power nanoWatt XLP technology that achieves microampcurrents in sleep mode. This makes it well suited to battery-powered and energy-harvesting applications where every microwatt of quiescent current matters.
Key differentiating specifications include 32MHz maximum CPU clock, 14KB self-programmable Flash with Memory Access Partitioning (MAP) support, 1KB linear SRAM, four Configurable Logic Cells, two EUSART (configurable for UART/SPI), two SPI/I2C peripherals, and eleven hardware timers. The integrated 12-bit ADCC performs automated averaging, filtering, and threshold comparisons in the background, offloading work from the CPU. Hardware CIPs allow complex signal generation, sensing, and communication tasks to run without software intervention, dramatically reducing code size and active-mode power.
Typical application domains include low-power IoT sensor nodes, battery-powered remote controls, HVAC and white-goods user interfaces, LED lighting controllers, and portable medical monitors. The wide 1.8V-3.6V supply range allows direct connection to single-cell Li-ion/LiFePO4 or two-cell alkaline battery stacks without an external LDO.
When designing with this device, pay attention to the decoupling network: place a 100nF ceramic between VDD and VSS as close to the pins as practical, and add a bulk 1uF-10uF cap on the supply rail. The MCLR pin should be pulled to VDD through a 10kohm resistor to avoid spurious resets. Program the CONFIG words early in the firmware to lock the oscillator, watchdog, and low-voltage-programming settings.
This page synthesises distributor pricing, drop-in alternative MPNs, application guidance, and design notes not found in the standalone Microchip datasheet.
Drop-in alternatives for PIC16LF18455-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 PIC16LF18455-I/SS (same form factor and footprint) — differing in Package, ADC, Operating Temperature, DAC, Communication.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18455-I/SS
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →PIC16LF18446-I/SS
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →PIC16LF18445-I/SS
✅ Drop-In✓ In Stock
$1.08 / Unit
View Datasheet →PIC16LF18346-I/SO
✅ Drop-In✓ In Stock
$1.22 / Unit
View Datasheet →PIC16LF1829-I/SS
✅ Drop-In✓ In Stock
$1.15 / Unit
View Datasheet →PIC16LF18455-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 8-bit RISC |
| Maximum CPU Clock | 32 MHz |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 1 KB |
| Data EEPROM | 256 B |
| Operating Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | 26 |
| ADC | 12-bit with Computation (ADCC) |
| DAC | 5-bit (reference for comparators) |
| Comparators | 2 |
| PWM Channels | 2 (10-bit) |
| Configurable Logic Cells (CLC) | 4 |
| Complementary Waveform Generator (CWG) | Yes |
| EUSART | 2 |
| SPI / I2C | 2 |
| Timers | 11 |
| Package | SSOP-28 |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Mounting Type | Surface Mount |
| Data Bus Width | 8 bit |
| RoHS Status | Compliant |
| Low-Power Technology | eXtreme Low-Power (XLP) nanoWatt |
PIC16LF18455-I/SS Pin Configuration
| Pin 1 | RA5 — General-purpose I/O / ICD/ICSP programming clock |
| Pin 2 | RA4 — General-purpose I/O |
| Pin 3 | RA3 — General-purpose I/O / MCLR (programmable) |
| Pin 4 | RA2 — General-purpose I/O |
| Pin 5 | RA1 — General-purpose I/O |
| Pin 6 | RA0 — General-purpose I/O |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RA7 — General-purpose I/O / oscillator |
| Pin 9 | RA6 — General-purpose I/O / oscillator |
| Pin 10 | RC0 — General-purpose I/O |
| Pin 11 | RC1 — General-purpose I/O |
| Pin 12 | RC2 — General-purpose I/O |
| Pin 13 | RC3 — General-purpose I/O / SCL (I2C) |
| Pin 14 | RC4 — General-purpose I/O / SDA (I2C) |
| Pin 15 | RC5 — General-purpose I/O |
| Pin 16 | RC6 — General-purpose I/O / TX |
| Pin 17 | RC7 — General-purpose I/O / RX |
| Pin 18 | RB7 — General-purpose I/O / ICD |
| Pin 19 | VSS — Ground reference (second VSS) |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB6 — General-purpose I/O / PGC (ICSP clock) |
| Pin 22 | RB5 — General-purpose I/O / PGD (ICSP data) |
| Pin 23 | RB4 — General-purpose I/O |
| Pin 24 | RB3 — General-purpose I/O |
| Pin 25 | RB2 — General-purpose I/O |
| Pin 26 | RB1 — General-purpose I/O |
| Pin 27 | RB0 — General-purpose I/O / interrupt-on-change |
| Pin 28 | VDD — Positive supply voltage (second VDD) |
Typical Applications
PIC16LF18455-I/SS is suitable for 7 applications: Battery-Powered IoT Sensor Node, Capacitive Touch User Interface, BLDC Motor Control Signal Generator, Industrial HVAC Sensor Transmitter, Portable Medical Monitor / Wearable, Remote Control / Wireless Key Fob, LED Lighting Controller / DMX Decoder.
Battery-Powered IoT Sensor Node
The PIC16LF18455-I/SS fits battery-powered IoT sensor nodes because its eXtreme Low-Power (XLP) technology achieves sub-microamp sleep currents while the 12-bit ADCC with Computation performs sensor reading, averaging, and threshold comparison in hardware. Operates directly from a single CR2032 or Li-ion cell over the 1.8-3.6 V range without an external LDO. Core Independent Peripherals (CIPs) let the CPU sleep while the ADCC and CLCs scan sensors autonomously. This combination typically delivers years of battery life in duty-cycled sensor applications.
Recommended
Capacitive Touch User Interface
The PIC16LF18455-I/SS enables capacitive touch keypads and sliders via Microchip's mTouch CVD library, with up to 26 touch-capable I/O pins and integrated ADCC. The four Configurable Logic Cells (CLCs) can run wake-on-touch state machines without CPU intervention, preserving battery life. The 32 MHz core and 14 KB Flash comfortably host a touch + LED + UART stack. Industrial temperature range (-40 C to +85 C) suits appliances and white-goods panels.
Recommended
BLDC Motor Control Signal Generator
The PIC16LF18455-I/SS is well suited to auxiliary motor-control signal generation through its Complementary Waveform Generator (CWG) and two 10-bit PWM modules. The CWG produces dead-band-controlled complementary outputs for driving MOSFET gate drivers, while the comparators and 5-bit DAC references provide hardware overcurrent protection. The 32 MHz core and 1 KB SRAM can host sensorless commutation timing loops. Industrial temperature range and SSOP-28 footprint suit small-form-factor motor control PCBs.
Recommended
Industrial HVAC Sensor Transmitter
The PIC16LF18455-I/SS suits industrial HVAC transmitters because of its wide 1.8-3.6 V supply range, 12-bit ADCC for accurate temperature/humidity/pressure digitisation, and two EUSARTs for simultaneous RS-485 and local-debug links. The CLCs can implement hardware PID loops running in parallel with the main firmware, reducing CPU load. SSOP-28 fits on standard 4-layer industrial sensor PCBs. Operates across -40 C to +85 C with XLP sleep modes for solar/battery-backed field installations.
Recommended
Portable Medical Monitor / Wearable
The PIC16LF18455-I/SS is a strong fit for portable medical wearables thanks to its eXtreme Low-Power sleep currents (under 1 uA typical), 12-bit ADCC for biosignal acquisition, and CWG/PWM peripherals for driving piezo buzzer alerts. The 14 KB Flash hosts a baseline SpO2 or ECG front-end loop, while the ICSP interface allows firmware updates during FDA validation. The SSOP-28 package and 1.8-3.6 V range suit coin-cell-powered designs.
Recommended
Remote Control / Wireless Key Fob
The PIC16LF18455-I/SS is well suited to remote-control key fobs and wireless sensor tags because of its 1.8-3.6 V supply, sub-microamp sleep current, and ability to wake on comparator or ADCC events without CPU intervention. The two EUSARTs can drive low-power sub-GHz transceivers like the MRF89XA via SPI, while the CLCs implement button-debounce and pattern generation in hardware. Compact SSOP-28 saves PCB area in small enclosures.
Recommended
LED Lighting Controller / DMX Decoder
The PIC16LF18455-I/SS suits LED lighting controllers and DMX-512 decoders because its two 10-bit PWM modules can drive multiple LED channels via external MOSFETs, and the CWG generates accurate complementary drive waveforms. The two EUSARTs handle DMX-512 input and DMX-RDM bidirectional communication, while the 12-bit ADCC reads colour-temperature or light-intensity feedback. 32 MHz CPU easily handles 250 kbps DMX timing, and 1 KB SRAM buffers DMX frame data.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF18455-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18455-I/SS | PIC16LF18446-I/SS | PIC16LF18445-I/SS | PIC16LF18346-I/SO | PIC16LF1829-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SSOP-28 | SSOP-28 - same | SSOP-28 - same | SSOP-28 - same | SOIC-28 - same pin count | SSOP-28 - same |
| Core | PIC16 8-bit, 32 MHz | PIC16 8-bit, 32 MHz | PIC16 8-bit, 32 MHz | PIC16 8-bit, 32 MHz | PIC16 8-bit, 32 MHz | PIC16 8-bit, 32 MHz |
| Program Memory (Flash) | 14 KB | 14 KB - identical | 28 KB (+100%) | 14 KB - identical | 28 KB (+100%) | 16 KB (+14%) |
| Data SRAM | 1 KB | 1 KB - identical | 1 KB - identical | 1 KB - identical | 2 KB (+100%) | 1 KB - identical |
| Operating Voltage | 1.8 V to 3.6 V | 2.3 V to 5.5 V (wider) | 1.8 V to 3.6 V - identical | 1.8 V to 3.6 V - identical | 1.8 V to 3.6 V - identical | 1.8 V to 3.6 V - identical |
| 12-bit ADCC | Yes | Yes | Yes | Yes | Yes | No (10-bit ADC) |
| Configurable Logic Cells (CLC) | 4 | 4 - identical | 4 - identical | 4 - identical | 2 (fewer) | 0 (none) |
| EUSART | 2 | 2 - identical | 2 - identical | 1 (fewer) | 2 - identical | 1 (fewer) |
Key Differentiators
- Integrated 12-bit ADCC with hardware averaging and threshold comparison (vs PIC16LF1829-I/SS)
- Four Configurable Logic Cells (CLCs) for hardware state machines (vs PIC16LF1829-I/SS)
- Complementary Waveform Generator (CWG) with dead-band control (vs PIC16LF1829-I/SS)
- Wider 1.8-3.6 V supply range supports battery-powered designs (vs PIC16F18455-I/SS)
Design Notes
Place a 100 nF ceramic decoupling capacitor between each VDD pin (pin 20 and pin 28) and the nearest VSS pin, with the shortest possible loop. Add a bulk 1 uF to 10 uF capacitor on the supply rail to handle transient loads from the internal ADC and PWM peripherals. The PIC16LF18455-I/SS can draw brief current spikes during Flash writes that exceed the steady-state I_DD spec, so the bulk cap is essential for clean rail voltage.
Ensure the MCLR pin (RA3, shared with general-purpose I/O) is configured correctly in the CONFIG words: either as a reset pin with a 10 kohm pull-up to VDD, or as a digital input only. Leaving MCLR floating is a common cause of spurious resets. According to the Microchip datasheet, programmers like PICkit 4 require VPP on MCLR; if MCLR is repurposed as I/O, external HV programming via ICSP must be used instead.
Keep the SSOP-28 PCB footprint's thermal pad (if any) connected to a small copper island on the top layer, with vias to a bottom-layer ground pour for heat dissipation. Although the PIC16LF18455-I/SS typically runs cool at XLP sleep currents, sustained 32 MHz operation at 3.6 V can push the die temperature 10-15 C above ambient. Route the ICSP signals (PGC/PGD/MCLR/VPP) on inner layers if the top layer is densely packed with I/O traces.
The 12-bit ADCC accuracy depends on a clean analog supply. When using ADCC in mixed-signal designs, isolate AVREF from digital VDD noise by adding a small ferrite bead or 10 ohm resistor between VDD and AVREF, plus a 100 nF + 10 uF decoupling pair directly at the AVREF pin. The PIC16LF18455-I/SS integrates hardware averaging and oversampling, but noisy rails degrade effective ENOB regardless.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - this is an industrial-grade (I) part rated -40 C to +85 C. For automotive applications, contact Microchip for the AEC-Q100 qualified variant.
