PIC16F18455-I/SS - 8-Bit 32MHz 14KB Flash XLP MCU | Microchip
MPN: PIC16F18455-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.28 | $12.80 |
| 100 | $1.1 | $110.00 |
| 500 | $0.95 | $475.00 |
| 1,000 | $0.85 | $850.00 |
PIC16F18455-I/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripheral I/O, and interrupt control on one die. The PIC16F18455's 8-bit Harvard architecture executes one instruction per cycle (excluding branches), and its XLP lineage targets sleep currents in the nanoamp range with active run currents below 1 mA/MHz.
Key features include 14 KB self-programmable Flash, 1 KB SRAM, 256 B EEPROM, an integrated 10-bit ADC with computation, multiple 8/16-bit timers, EUSART, SPI, and I2C peripherals, a 32 MHz internal oscillator, and an operating range of -40 °C to +85 °C (industrial grade). The 28-SSOP footprint exposes up to 25 digital I/O, including interrupt-on-change, with peripheral pin select (PPS) routing.
The device combines a low-power analog complement with Core Independent Peripherals, allowing capacitive sensing, power-supply signaling, and real-time control without CPU intervention. Hardware CIPs such as the Configurable Logic Cell (CLC), Complementary Waveform Generator (CWG), and Numerically Controlled Oscillator (NCO) offload tasks from the CPU, reducing active-mode power and freeing MIPS for application code.
Typical applications include low-power IoT sensor nodes, battery-powered HVAC controls, automotive body and interior ECUs, white goods and appliance HMI, LED lighting controllers, and general-purpose 8-bit embedded products. The 32 MHz core plus PPS gives designers flexibility to remap peripherals, while XLP enables multi-year coin-cell operation.
When designing with this part, place a 100 nF decoupling capacitor within 2 mm of VDD and connect unused I/O to a defined logic level to minimize current draw. Programming is supported by Microchip's MPLAB X IDE with free XC8 compiler; in-circuit serial programming (ICSP) uses only two pins, simplifying board layout and field upgrades.
This page synthesizes distributor pricing, drop-in 28-SSOP alternatives, application notes, and practical design guidance that complement the manufacturer datasheet for engineers evaluating the PIC16F18455-I/SS.
Drop-in alternatives for PIC16F18455-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 PIC16F18455-I/SS (same form factor and footprint) — differing in Core Architecture, Data EEPROM, Mounting Type, Program Memory (Flash), Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18456-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.34 / Unit
View Datasheet →PIC16F18444-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16F18446-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16F18445-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16F18455-E/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.05 / Unit
View Datasheet →PIC16F18446-I/GZ
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →PIC16F18346-I/SS
✅ Drop-In✓ In Stock
$0.84 / Unit
View Datasheet →PIC16F18345-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18455-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 8-bit RISC Harvard |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 1 KB |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage (VDD) | 1.8 V to 5.5 V |
| Supply Voltage Range (PIC16F) | 2.3 V to 5.5 V (F suffix, Flash) |
| Operating Temperature | -40 °C to +85 °C (industrial, -I grade) |
| Package / Case | 28-SSOP (5.30 mm body, 0.65 mm pitch) |
| Mounting Type | Surface Mount (Gull-Wing) |
| Communication Peripherals | EUSART, SPI, I2C |
| Core Independent Peripherals (CIPs) | CLC, CWG, NCO, PWM, DSM |
| XLP Low-Power Modes | Yes (eXtreme Low-Power) |
| Internal Oscillator | 32 MHz HFINTOSC |
| Programming Interface | ICSP (In-Circuit Serial Programming), 2-wire |
| MSL Level | 2 (1 Year Floor Life) |
| RoHS Status | Compliant |
| Lead-Free / Halogen-Free | Yes (per Microchip product page) |
| Tube Standard Quantity | 47 pcs/tube |
PIC16F18455-I/SS Pin Configuration
| Pin 1 | RA2 — Port A bit 2 / analog input / I/O |
| Pin 2 | RA3 — Port A bit 3 / analog input / I/O |
| Pin 3 | RA4 — Port A bit 4 / analog input / I/O |
| Pin 4 | RA5 — Port A bit 5 / analog input / I/O |
| Pin 5 | VDD — Positive supply voltage |
| Pin 6 | VSS — Ground reference |
| Pin 7 | RA6 — Port A bit 6 / I/O |
| Pin 8 | RA7 — Port A bit 7 / I/O |
| Pin 9 | RB0 — Port B bit 0 / interrupt-on-change / I/O |
| Pin 10 | RB1 — Port B bit 1 / I/O |
| Pin 11 | RB2 — Port B bit 2 / I/O |
| Pin 12 | RB3 — Port B bit 3 / I/O |
| Pin 13 | RB4 — Port B bit 4 / I/O |
| Pin 14 | RB5 — Port B bit 5 / I/O |
| Pin 15 | RB6 — Port B bit 6 / ICSP programming clock |
| Pin 16 | RB7 — Port B bit 7 / ICSP programming data |
| Pin 17 | RC0 — Port C bit 0 / I/O |
| Pin 18 | RC1 — Port C bit 1 / I/O |
| Pin 19 | RC2 — Port C bit 2 / I/O |
| Pin 20 | RC3 — Port C bit 3 / I/O / SCL (I2C) |
| Pin 21 | RC4 — Port C bit 4 / I/O / SDA (I2C) |
| Pin 22 | RC5 — Port C bit 5 / I/O |
| Pin 23 | RC6 — Port C bit 6 / I/O / TX (EUSART) |
| Pin 24 | RC7 — Port C bit 7 / I/O / RX (EUSART) |
| Pin 25 | RE3 — Port E bit 3 / MCLR#/reset (input only) |
| Pin 26 | RA0 — Port A bit 0 / analog input / I/O |
| Pin 27 | RA1 — Port A bit 1 / analog input / I/O |
| Pin 28 | VDD — Positive supply voltage (second VDD pin) |
Typical Applications
PIC16F18455-I/SS is suitable for 7 applications: Battery-Powered IoT Sensor Node, Automotive Body and Interior ECU, White Goods Appliance HMI, LED Lighting Controller, Industrial HVAC Sensor Module, Portable Medical Monitoring Device, Consumer Audio Accessory.
Battery-Powered IoT Sensor Node
The PIC16F18455-I/SS fits IoT sensor node designs because its XLP technology delivers nanoamp-range sleep currents and <1 mA/MHz active current at 32 MHz. With 14 KB Flash and 1 KB SRAM, the device hosts small sensor-fusion or BLE/Zigbee stacks. Place the MCU in sleep between sensor reads and radio transmits to extend coin-cell life to multiple years. The 10-bit ADC supports direct resistive bridge or thermistor measurement without external signal conditioning.
Recommended
Automotive Body and Interior ECU
The PIC16F18455 family supports automotive body modules such as interior lighting controllers, seat-position memory, and HVAC blend-door actuators. Its Core Independent Peripherals (CLC, CWG, NCO) handle PWM dimming, multi-channel motor drive, and tone generation without CPU load. The PIC16F18455-E/SS extended-temperature variant operates at +125 °C junction, meeting under-dash thermal requirements. AEC-Q100 grade parts may be required for OEM deployments.
Recommended
White Goods Appliance HMI
In washing machines, dishwashers, and ovens, the PIC16F18455-I/SS drives capacitive touch keypads via the mTouch peripheral, multiplexed seven-segment or TFT displays, and rotary encoder inputs. Its 14 KB Flash holds UI state machines plus diagnostic code, while 1 KB SRAM supports display framebuffers. The 32 MHz core gives smooth response, and XLP sleep keeps standby power below EU ErP limits when the appliance is idle.
Recommended
LED Lighting Controller
Smart LED drivers and architectural lighting benefit from the PIC16F18455-I/SS's Complementary Waveform Generator (CWG), PWM, and Numerically Controlled Oscillator (NCO) peripherals for flicker-free dimming and color-mixing PWM. The 10-bit ADC reads ambient light sensors and potentiometers, while I2C drives WS2812-style or analog LED drivers. Low sleep current makes it ideal for always-on standby lighting controls.
Recommended
Industrial HVAC Sensor Module
For HVAC duct sensors, thermostats, and damper controllers, the PIC16F18455-I/SS reads temperature, humidity, and air-quality sensors via its 10-bit ADC, drives 0-10 V or PWM outputs, and communicates over RS-485 or Modbus via EUSART. Industrial -40 to +85 °C operation handles mechanical-room environments, while 14 KB Flash supports sensor calibration tables and PID control loops.
Recommended
Portable Medical Monitoring Device
Handheld pulse-oximeter-style devices and patient wearables rely on the PIC16F18455-I/SS for low-power sensor acquisition, on-screen indication, and BLE uplinks. The 1 KB SRAM holds short sample buffers, and the 256-byte EEPROM stores calibration constants without external memory. Industrial temperature range supports the operating envelope, while XLP sleep extends battery life on a single AAA cell.
Recommended
Consumer Audio Accessory
Low-cost wireless speakers, headphone controllers, and audio accessories use the PIC16F18455-I/SS for volume/power button scanning, LED status indication, and I2C control of audio codecs or DACs. The Core Independent Peripherals offload button debouncing and LED fade effects from the CPU, leaving MIPS available for BLE stack handling.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18455-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18456-I/SS | PIC16F18444-I/SS | PIC16F18446-I/SS | PIC16F18346-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Program Memory (Flash) | 14 KB | 28 KB (+100%) | 7 KB (-50%) | 28 KB (+100%) | 28 KB (+100%) |
| Data SRAM | 1 KB | 2 KB (+100%) | 1 KB (same) | 2 KB (+100%) | 2 KB (+100%) |
| Data EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Maximum CPU Speed | 32 MHz | 32 MHz (same) | 32 MHz (same) | 32 MHz (same) | 32 MHz (same) |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| Operating Temperature (I grade) | -40 to +85 °C | -40 to +85 °C | -40 to +85 °C | -40 to +85 °C | -40 to +85 °C |
| Family / Generation | PIC16F184xx (XLP, CIPs) | PIC16F184xx (same) | PIC16F184xx (same) | PIC16F184xx (same) | PIC16F183xx (prior gen) |
| Core Independent Peripherals (CIPs) | CLC, CWG, NCO, PWM, DSM | Same CIP set | Same CIP set | Same CIP set | Subset CIPs |
Key Differentiators
- Largest CIP integration in PIC16F184xx family at 14 KB Flash tier (vs PIC16F18444-I/SS)
- Cost-optimized mid-memory tier in PIC16F184xx family (vs PIC16F18456-I/SS)
- Modern CIP architecture vs prior-generation PIC16F1827 (vs PIC16F1827-I/SS)
Design Notes
Place a 100 nF decoupling capacitor within 2 mm of each VDD pin (pins 5 and 28) and a bulk 10 uF capacitor near the MCU. For XLP sleep operation, drive unused I/O to a defined logic level (high or low) and disable unused peripherals via PMD registers to achieve the datasheet's nanoamp-range sleep current. Switching from HFINTOSC to LFINTOSC before sleep reduces wake-up current on battery-powered designs.
Route the ICSP signals PGC (RB6) and PGD (RB7) directly to an in-circuit programming header without series resistors above 100 ohm to keep programming margins within the Microchip MPLAB specification. Keep the MCLR#/RE3 line short and place the MCLR pull-up resistor (typically 10 kohm) within 5 mm of the pin to prevent spurious resets from ESD or coupling.
Do not assume pin-compatibility between SSOP and SOIC variants of the PIC16F18455 family - SSOP has 0.65 mm pitch while SOIC has 1.27 mm pitch, so PCB footprints differ. When migrating between temperature grades (I = -40 to +85 °C, E = -40 to +125 °C), confirm AEC-Q100 grade is required for automotive OEM deployments because the standard -I grade is not AEC-Q100 qualified.
Estimated: at 32 MHz the PIC16F18455's internal oscillator has approximately +/-2% accuracy across -40 to +85 °C, which may not meet UART baud-rate tolerance for 115200 bps or higher. For RS-485 or Modbus applications requiring tight baud tolerance, add an external 32.768 kHz or HF crystal on OSC1/OSC2 and switch to HS mode via the configuration registers. The PIC16F18455 supports crystal operation up to 20 MHz on HS and 32 MHz via HSPLL.
Keep analog and digital ground paths separated and joined only at the VSS pin to minimize ADC noise coupling. Place the ADC reference decoupling capacitor (typically 100 nF) within 3 mm of the AVSS/AVDD pins when the design uses an external reference. Route high-speed digital traces (SPI, PWM) away from the analog input pins (RA0-RA5) to preserve ADC measurement integrity.
Compliance Information
RoHS compliant per Microchip product page. Industrial -I grade is not AEC-Q100 qualified; AEC-Q100 qualification must be verified per specific automotive part number if required. Pin-compatible E-grade (-40 to +125 °C) variants are available (e.g., PIC16F18455-E/SS).
