PIC16F18455T-I/SS - 32MHz 8-bit MCU, 14KB Flash, 28-SSOP
MPN: PIC16F18455T-I/SS β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.78 | $1.78 |
| 10 | $1.55 | $15.50 |
| 100 | $1.32 | $132.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.05 | $1,050.00 |
PIC16F18455T-I/SS Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash), data memory (RAM), and a range of peripherals onto one die. Within the broader semiconductor taxonomy, MCUs belong to the embedded controller category, sitting beneath microprocessors in processing power but above simple logic ICs in functional integration. PIC16F series devices are Microchip's mid-range 8-bit family, optimized for low-power general-purpose and consumer/industrial applications.
Key features of the PIC16F18455T-I/SS include 14 KB (8K x 14 words) of self-programmable Flash, 1 KB of SRAM, 256 bytes of EEPROM, 26 I/O pins, and rich on-chip peripherals: 2 EUSART, 2 MSSP (SPI/I2C), 2 PWM modules with complementary outputs, CWG (Complementary Waveform Generator), 12-bit ADC2, 5-bit DAC, 2 comparators, and a windowed WDT. The XLP deep-sleep current is typically under 50 nA with full RAM retention.
The PIC16F18455 architecture uses a Harvard RISC core with a 14-bit instruction word and single-cycle execution at 32 MHz (8 MIPS). The 12-bit ADC2 with computation automates averaging, threshold comparison, and oversampling, reducing firmware burden. Peripheral Pin Select (PPS) and Memory Access Partitioning (MAP) provide flexible pin remapping and bootloader protection.
Typical applications include low-power IoT sensor nodes, battery-powered consumer devices, smart home controls, LED lighting controllers, small appliance user interfaces, and industrial sensor conditioning. The XLP nanoWatt features and 32 MHz performance balance responsive computation with multi-year battery life.
When designing with this part, allocate at least one decoupling capacitor per power pin (typically 100 nF ceramic) and follow Microchip's MPLAB X IDE / XC8 compiler toolchain. The wide 1.8 V to 5.5 V supply range enables both single-cell Li-ion and 5 V regulated designs.
This page synthesizes distributor pricing, drop-in package alternatives, and practical design notes not found in the manufacturer datasheet alone, providing engineers with a faster selection path for the PIC16F18455 family.
Drop-in alternatives for PIC16F18455T-I/SS β 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 PIC16F18455T-I/SS (same form factor and footprint) β differing in ADC, DAC, Package, Core Architecture, Program Memory (Flash).
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F18455-I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F18455T-I/SO
β Drop-Inβ In Stock
$1.08 / Unit
View Datasheet βPIC16F18455T-I/STX
β Drop-Inπ Reference alternative (not in catalog)
PIC16F18345T-I/SS
β Drop-Inβ In Stock
$1.02 / Unit
View Datasheet βPIC16F18455-E/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F18455T-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 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 (8 MIPS) |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| I/O Pins | 26 |
| ADC | 12-bit ADC2 with Computation |
| DAC | 5-bit, 2 channels |
| Comparators | 2 |
| PWM Modules | 2 (with complementary outputs) |
| Communication Peripherals | 2x EUSART, 2x MSSP (SPI/I2C) |
| Package | 28-SSOP (5.30 mm) |
| Operating Temperature | -40C to +85C (Industrial) |
| XLP Sleep Current | Typical 50 nA (deep sleep) |
| Mounting Type | Surface Mount, Tape & Reel |
| RoHS Status | Compliant |
PIC16F18455T-I/SS Pin Configuration
| Pin 1 | RA0/ICDDAT β Bidirectional I/O / ICD Data |
| Pin 2 | RA1 β Bidirectional I/O |
| Pin 3 | RA2 β Bidirectional I/O |
| Pin 4 | RA3/MCLR β Bidirectional I/O / Master Clear (reset) |
| Pin 5 | RA4 β Bidirectional I/O |
| Pin 6 | RA5 β Bidirectional I/O |
| Pin 7 | RA6 β Bidirectional I/O |
| Pin 8 | RA7 β Bidirectional I/O |
| Pin 9 | VSS β Ground reference |
| Pin 10 | RB0 β Bidirectional I/O |
| Pin 11 | RB1 β Bidirectional I/O |
| Pin 12 | RB2 β Bidirectional I/O |
| Pin 13 | RB3 β Bidirectional I/O |
| Pin 14 | RB4 β Bidirectional I/O |
| Pin 15 | RB5 β Bidirectional I/O |
| Pin 16 | RB6/ICDCLK β Bidirectional I/O / ICD Clock |
| Pin 17 | RB7 β Bidirectional I/O |
| Pin 18 | VPP/RB7 β Alternate high-voltage programming pin |
| Pin 19 | RC0 β Bidirectional I/O |
| Pin 20 | RC1 β Bidirectional I/O |
| Pin 21 | RC2 β Bidirectional I/O |
| Pin 22 | RC3 β Bidirectional I/O |
| Pin 23 | RC4 β Bidirectional I/O |
| Pin 24 | RC5 β Bidirectional I/O |
| Pin 25 | RC6 β Bidirectional I/O |
| Pin 26 | RC7 β Bidirectional I/O |
| Pin 27 | VDD β Positive supply (1.8 V to 5.5 V) |
| Pin 28 | VSS β Ground reference |
Typical Applications
PIC16F18455T-I/SS is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Smart Home Control Panels, Consumer Appliance User Interfaces, LED Lighting Controllers, Industrial Sensor Conditioning, Automotive Body and Accessory Modules.
Battery-Powered IoT Sensor Nodes
The PIC16F18455T-I/SS is ideal for battery-powered IoT sensor nodes thanks to its XLP nanoWatt technology delivering approximately 50 nA deep-sleep current with full 1 KB SRAM retention. The integrated 12-bit ADC2 with computation enables autonomous sensor sampling while the CPU remains asleep, dramatically reducing average power consumption. With 14 KB of Flash and rich peripherals including EUSART and MSSP, it connects directly to low-power RF modules such as Sub-GHz transceivers or BLE modules for years of operation on a single coin cell. The 1.8 V to 5.5 V supply range accommodates single-cell Li-ion, 2xAA alkaline, and regulated 3.3 V rails.
Recommended
Smart Home Control Panels
For smart home wall switches, dimmer controllers, and HVAC user interfaces, the PIC16F18455T-I/SS provides the right balance of analog performance, PWM channels, and low-power sleep. Two 16-bit PWM modules with complementary outputs can directly drive MOSFET half-bridges for AC phase-cut dimming or DC motor control. The 26 I/O pins handle multiple capacitive touch buttons via the Peripheral Touch Controller (PTC) and LED indicators. The CWG and 12-bit ADC2 simplify zero-cross detection and current sensing in single designs.
Recommended
Consumer Appliance User Interfaces
In small kitchen and personal-care appliances, the PIC16F18455T-I/SS drives segment LCDs (via the integrated LCD driver on family members), capacitive touch panels, and motor control PWM without external logic. Its 32 MHz core handles UI state machines and brushless-DC commutation in real time. The 1.8 V to 5.5 V supply allows direct connection to 4xAA or USB 5 V rails. Industrial-grade -40C to +85C temperature range handles the inside-of-oven or freezer environments found in modern appliance cabinets.
Recommended
LED Lighting Controllers
Addressable and architectural LED lighting controllers benefit from the PIC16F18455T-I/SS's 32 MHz performance and rich PWM architecture. The two 16-bit PWM modules with dead-band control can drive high-power RGBW LED strings, while the EUSART and MSSP peripherals receive DMX-512 or SPI-driven pixel data from upstream controllers. The 12-bit ADC2 supports illuminance sensing for daylight harvesting with hardware averaging that offloads the CPU. Deep-sleep under 1 uA enables always-on ambient light sensing in battery-powered decorative fixtures.
Recommended
Industrial Sensor Conditioning
The PIC16F18455T-I/SS is well suited for industrial 4-20 mA loop-powered sensor transmitters and RTD/thermocouple signal conditioning. The 12-bit ADC2 with oversampling achieves effective 14- to 16-bit resolution suitable for precision instrumentation, and the integrated 5-bit DAC plus comparators enable on-chip excitation and ratiometric measurement. The EUSART interfaces directly to RS-485 transceivers for industrial fieldbus nodes, while XLP sleep extends battery life in remote wireless sensor installations.
Recommended
Automotive Body and Accessory Modules
Although the PIC16F18455T-I/SS is not AEC-Q100 qualified, it is widely used in non-safety automotive body modules such as ambient lighting controllers, USB charging ports, accessory switch panels, and aftermarket infotainment accessories. Its 32 MHz performance, CWG for half-bridge drive, and 12-bit ADC2 with threshold-detection simplify body-electronics designs. For safety-critical or under-hood applications, designers should select the AEC-Q100 qualified PIC16F18455-E/SS extended-temperature variant or migrate to a Q-graded PIC16F18xxx K-series part.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18455T-I/SS β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18455-I/SS | PIC16F18455T-I/SO | PIC16F18455T-I/STX | PIC16F18345T-I/SS | PIC16F18455-E/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP (same) | 28-SOIC (same pinout, different footprint) | 28-VQFN 4x4 (same pinout, different footprint) | 28-SSOP (same) | 28-SSOP (same) |
| Core / Speed | 8-bit / 32 MHz | 8-bit / 32 MHz | 8-bit / 32 MHz | 8-bit / 32 MHz | 8-bit / 32 MHz | 8-bit / 32 MHz |
| Flash Program Memory | 14 KB | 14 KB | 14 KB | 14 KB | 14 KB | 14 KB |
| Data SRAM / EEPROM | 1 KB / 256 B | 1 KB / 256 B | 1 KB / 256 B | 1 KB / 256 B | 1 KB / 0 B | 1 KB / 256 B |
| ADC Resolution | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 10-bit ADC | 12-bit ADC2 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C |
| Approx. Unit Price (qty 1000) | $1.05 | $1.00 - $1.05 | $1.05 - $1.10 | $1.15 - $1.25 | $0.95 - $1.05 | $1.40 - $1.55 |
Key Differentiators
- Newest-generation PIC16F184xx family with ADC2 hardware computation (vs PIC16F18345T-I/SS)
- EEPROM and MAP boot-loader support (vs PIC16F18345T-I/SS)
- Multiple SSOP-compatible packaging options within same silicon (vs PIC16F18455-E/SS)
Design Notes
Estimated: the PIC16F18455T-I/SS typical active current is approximately 4 mA at 32 MHz / 5 V with peripherals enabled. Always place a 100 nF decoupling capacitor as close as possible to each VDD pin (pin 27) and a bulk 1-10 uF capacitor on the supply rail. For battery applications, use Sleep mode (50 nA typical) and rely on ADC2 autonomous conversions plus EUSART RX interrupts to wake the CPU only on real events, avoiding periodic polling that wastes energy.
The 28-SSOP package has a 0.65 mm pin pitch requiring careful PCB layout. Use 0.4 mm wide SSOP pads with 1:1 trace-to-pad ratio and breakout traces routed between pins to inner layers. Place the ICSP/ICD header (RA0/RA6 or RB6/RB7) on the board edge or test-point cluster for in-circuit debugging with PICkit 4 or MPLAB ICD 4. Keep the MCLR pull-up (typically 10 kohm) close to the RA3/MCLR pin to ensure reliable reset.
When migrating from the older PIC16F182x or PIC16F183x families, verify that PPS (Peripheral Pin Select) remapping is correctly configured in firmware - new code is required even though peripherals are similar. Do not connect the ICP/ICD pins (RA0/RA6 or RB6/RB7) directly to LEDs or strong pull-ups, as this can interfere with in-circuit programming. Always set unused I/O pins as outputs low and disable unused peripherals in firmware to minimize current draw.
At maximum active load (32 MHz, all peripherals, 5 V VDD), the PIC16F18455T-I/SS consumes approximately 8-10 mA, dissipating 40-50 mW of power. The 28-SSOP package theta_JA is approximately 100 C/W in still air, yielding a junction temperature rise of only 4-5 C - well within safe limits. Thermal management is generally not required for typical 8-bit MCU applications, but verify in enclosed housings where ambient may exceed 60 C.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - for AEC-Q100 applications, contact Microchip for the automotive-grade variant. Lead-free and halogen-free per Microchip environmental compliance documentation.
