PIC16F18455T-I/SO - 14KB Flash 8-bit XLP MCU 28-SOIC | Microchip
MPN: PIC16F18455T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.2 | $2.20 |
| 10 | $1.95 | $19.50 |
| 100 | $1.7 | $170.00 |
| 500 | $1.45 | $725.00 |
| 1,000 | $1.25 | $1,250.00 |
| 2,600 | $1.08 | $2,808.00 |
PIC16F18455T-I/SO Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash, RAM, EEPROM), and peripherals on one silicon die. The PIC16F18455 sits in the hierarchical family PIC16F18455 -> PIC16F184xx -> PIC16 -> PIC microcontrollers -> 8-bit microcontrollers -> microcontrollers -> integrated circuits. Microchip's PIC16 family is a workhorse of low-power and general-purpose embedded designs thanks to the eXtreme Low-Power (XLP) technology that delivers nanoWatt sleep currents.
Key features include 14KB (8Kx14 words) of self-programmable Flash, 1KB data SRAM, 256B EEPROM, a 12-bit ADC with Computation (ADC2), 2 PWMs with complementary waveform generation, a 5-bit DAC, two comparators, EUSART, SPI, I2C, a Complementary Waveform Generator (CWG), and Core Independent Peripherals (CIPs) that offload tasks from the CPU. The device operates from 2.3V to 5.5V across -40C to +125C.
The architecture uses a Harvard-style 8-bit RISC core with a modified 14-bit instruction word optimized for code density. Core Independent Peripherals (CIPs) such as the CWG, NCO, and configurable logic cells let the chip handle timing-critical events without CPU intervention, freeing the core for application logic and reducing firmware complexity.
Typical applications include battery-powered IoT sensor nodes, low-power wireless remotes, HVAC controls, small appliances, LED lighting controllers, and consumer white-goods user-interface boards. The trailing 'T' in the part number designates Tape and Reel packaging, and the '/SO' suffix identifies the 300-mil 28-pin SOIC.
When designing with this part, ensure your programmer/debugger is compatible with the device's In-Circuit Serial Programming (ICSP) interface and verify the SOIC pad pitch against your PCB footprint. For applications below 2.5V, drop to 16MHz CPU speed; for full 32MHz operation, keep VDD at 2.5V or above.
This page synthesizes distributor pricing, drop-in PIC16F184xx and PIC16F182xx family alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16F18455T-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 PIC16F18455T-I/SO (same form factor and footprint) — differing in Package, ADC, DAC, Comparators, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18455-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18455-E/SO
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC16F18446T-I/SO
✅ Drop-In✓ In Stock
$0.6406 / Unit
View Datasheet →PIC16F18444T-I/SO
✅ Drop-In✓ In Stock
$0.55 / Unit
View Datasheet →PIC16F18445-I/SO
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →PIC16F18345T-I/SS
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16F18455T-I/SO Maximum Ratings & Electrical Characteristics
| Product Family | PIC16(L)F184xx |
| Core | 8-bit PIC RISC |
| Program Memory (Flash) | 14 KB (8K x 14) |
| Data SRAM | 1 KB |
| EEPROM | 256 B |
| Maximum CPU Speed | 32 MHz |
| Supply Voltage (VDD) | 2.3 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (industrial) |
| ADC | 12-bit ADC with Computation (ADC2) |
| DAC | 5-bit DAC |
| Comparators | 2 |
| PWM Outputs | 2 (with CWG) |
| Communication | EUSART, SPI, I2C |
| Package | 28-pin SOIC (300 mil) |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| RoHS Status | Compliant |
PIC16F18455T-I/SO Pin Configuration
| Pin 1 | RA5/MCLR — Digital I/O / Master Clear (reset) input |
| Pin 2 | RA0 — Digital I/O / analog input |
| Pin 3 | RA1 — Digital I/O / analog input |
| Pin 4 | RA2 — Digital I/O / analog input |
| Pin 5 | RA3 — Digital I/O / analog input |
| Pin 6 | RA4 — Digital I/O / analog input |
| Pin 7 | RA5 — Digital I/O |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA7 — Digital I/O / oscillator |
| Pin 10 | RA6 — Digital I/O / oscillator |
| Pin 11 | RC0 — Digital I/O / analog input |
| Pin 12 | RC1 — Digital I/O / analog input |
| Pin 13 | RC2 — Digital I/O / analog input |
| Pin 14 | RC3 — Digital I/O / analog input |
| Pin 15 | RC4 — Digital I/O |
| Pin 16 | RC5 — Digital I/O |
| Pin 17 | RC6 — Digital I/O / EUSART TX |
| Pin 18 | RC7 — Digital I/O / EUSART RX |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0 — Digital I/O / analog input / interrupt-on-change |
| Pin 22 | RB1 — Digital I/O / analog input / interrupt-on-change |
| Pin 23 | RB2 — Digital I/O / analog input / interrupt-on-change |
| Pin 24 | RB3 — Digital I/O / analog input / interrupt-on-change |
| Pin 25 | RB4 — Digital I/O / interrupt-on-change |
| Pin 26 | RB5 — Digital I/O / interrupt-on-change |
| Pin 27 | RB6 — Digital I/O / ICSP clock |
| Pin 28 | RB7 — Digital I/O / ICSP data |
Typical Applications
PIC16F18455T-I/SO is suitable for 6 applications: Battery-Powered IoT Sensor Node, Low-Power Wireless Remote Control, HVAC Control and Thermostat, Small Appliance Control Board, LED Lighting Controller, Consumer White-Goods User Interface.
Battery-Powered IoT Sensor Node
The PIC16F18455T-I/SO is well suited for battery-powered IoT sensor nodes where its 14KB Flash, 1KB SRAM, and 12-bit ADC2 handle periodic sensor reads with on-chip computation. The XLP (eXtreme Low-Power) technology enables nanoWatt sleep currents, so a coin cell can power a temperature/humidity node for years. Core Independent Peripherals (CIPs) like the CWG and NCO run timers without waking the CPU, keeping firmware lean. Operating from 2.3V to 5.5V, the part works directly from a 3V coin cell or 3.3V regulated rail. EUSART/SPI/I2C allow easy connection to radios or environmental sensors.
Recommended
Low-Power Wireless Remote Control
For handheld IR/RF remotes, the PIC16F18455T-I/SO combines eXtreme Low-Power sleep current with a fast 32MHz wake-up, ensuring long battery life and instant button response. The CWG generates accurate carrier waveforms for IR transmission without CPU overhead, while the 12-bit ADC2 reads joystick or slider positions. Its 2.3-5.5V range allows direct connection to single-cell Li-ion or 2xAA batteries. With 256B EEPROM, pairing codes and user preferences persist across battery swaps. The 28-SOIC package is easy to hand-solder for low-volume custom remote designs.
Recommended
HVAC Control and Thermostat
The PIC16F18455T-I/SO fits HVAC thermostat designs where its 12-bit ADC2 with computation accurately measures NTC thermistor temperature while the CWG drives TRIAC phase-control for heating/cooling stages. Its industrial -40C to +85C temperature grade tolerates equipment-room environments, and the wide 2.3-5.5V supply range accepts 24VAC rectified/regulated rails. The EUSART supports Modbus or BACnet communication with HVAC controllers, while the 14KB Flash accommodates state-machine control firmware. Core Independent Peripherals offload timing-critical TRIAC firing from the CPU.
Recommended
Small Appliance Control Board
For small appliances like coffee makers, blenders, or air purifiers, the PIC16F18455T-I/SO drives brushed DC motors or solenoids via its PWM outputs while reading sensors through the 12-bit ADC2. The 14KB Flash supports menu-driven user interfaces with EEPROM-backed preset storage, and the comparators handle over-current and over-temperature protection without CPU intervention. Its 28-SOIC package is widely accepted by contract-assembly houses. Power consumption is low enough for Energy Star standby targets, with the XLP sleep current under 100nA in deep sleep.
Recommended
LED Lighting Controller
The PIC16F18455T-I/SO suits LED lighting controllers that need precise PWM dimming and color mixing across multiple channels. The CWG with dead-band control generates complementary MOSFET drive signals for buck/boost LED drivers, while 12-bit ADC2 measures driver current and LED string voltage for closed-loop regulation. With EUSART/SPI/I2C, the MCU interfaces with DMX, DALI, or 0-10V dimming front-ends. XLP technology keeps standby power below Energy Star limits when lights are off, and 256B EEPROM retains last-used brightness levels across power cycles.
Recommended
Consumer White-Goods User Interface
For washer/dryer/diswasher front panels, the PIC16F18455T-I/SO drives capacitive touch buttons, rotary encoders, and segment/character LCDs while polling the main appliance controller via UART. The 12-bit ADC2 reads water level or temperature sensors with hardware averaging, and the CWG drives buzzers with precise tone generation. Its 28-SOIC footprint is shared with the older PIC16F1827/1829 families, simplifying PCB reuse across product tiers. The 14KB Flash supports multilingual menu strings in EEPROM, and XLP keeps standby power below 0.5W to meet EU ecodesign rules.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18455T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18455-I/SO | PIC16F18455-E/SO | PIC16F18446T-I/SO | PIC16F18444T-I/SO | PIC16F18445-I/SO | PIC16F18345T-I/SS |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SOIC (300 mil) | 28-pin SOIC (300 mil) - same | 28-pin SOIC (300 mil) - same | 28-pin SOIC (300 mil) - same | 28-pin SOIC (300 mil) - same | 28-pin SOIC (300 mil) - same | 28-pin SSOP - same 28-pin count, different footprint pitch |
| Program Memory (Flash) | 14 KB | 14 KB | 14 KB | 28 KB | 7 KB | 14 KB | 14 KB |
| Data SRAM | 1 KB | 1 KB | 1 KB | 2 KB | 512 B | 1 KB | 1 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Maximum CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Supply 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 | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| Temperature Grade | Industrial -40 C to +85 C | Industrial -40 C to +85 C | Extended -40 C to +125 C | Industrial -40 C to +85 C | Industrial -40 C to +85 C | Industrial -40 C to +85 C | Industrial -40 C to +85 C |
Key Differentiators
- Same-die drop-in via tray packaging (vs PIC16F18455-I/SO)
- Extended temperature grade available (vs PIC16F18455-E/SO)
- Scalable within PIC16(L)F184xx family (vs PIC16F18444T-I/SO and PIC16F18446T-I/SO)
Design Notes
The PIC16F18455T-I/SO operates from 2.3V to 5.5V. For full 32MHz CPU speed, keep VDD at 2.5V or above; at 2.3V the maximum drops to 16MHz. Decouple VDD with a 100nF ceramic cap placed within 5mm of pin 20, and add a bulk 10uF cap on the rail. For battery applications, use the XLP sleep modes - the datasheet specifies nanoWatt-level sleep current with the ADC and references disabled, so current drain between sensor reads is well under 1uA.
For ICSP programming on the 28-SOIC, route PGD (RB7, pin 28) and PGC (RB6, pin 27) to a 2x3 0.1-inch header with MCLR pulled up through 10kohm and accessible from outside the enclosure. Per Microchip's ICSP specification, a 100 ohm series resistor on PGD/PGC reduces programming noise. Keep traces short and avoid routing them under switching converters or motor traces to prevent programming glitches.
Do not leave the MCLR pin floating - it must be pulled to VDD through a 10kohm resistor (or routed directly to a debugger's MCLR line). The 28-SOIC has only one VDD pin (pin 20) and one VSS pin (pin 19); insufficient decoupling here causes ADC2 noise. Note that pins 19 and 8 are both VSS in some package variants - verify against your specific SOIC pinout. Also: do not exceed 5.5V on any pin or the part will latch-up.
When using the CWG to drive MOSFET gates, place a 33-100 ohm series resistor within 5mm of the MCU pin to dampen ringing on the gate trace. Keep gate drive traces away from analog ADC inputs and route them on a separate layer if possible. For EUSART/SPI/I2C lines longer than 50mm, add a 22-33 ohm series resistor at the source end to control edge rates and reduce reflections.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC16F18455-E/SO for extended temperature applications adjacent to automotive. The /SO suffix denotes 28-pin SOIC, the T suffix denotes Tape and Reel.
