PIC16F18455-I/SP - 8-bit MCU 14KB Flash 32MHz 28-SPDIP | Microchip
MPN: PIC16F18455-I/SP β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.53 | $2.53 |
| 10 | $2.31 | $23.10 |
| 100 | $2.05 | $205.00 |
| 500 | $1.84 | $920.00 |
| 1,000 | $1.62 | $1,620.00 |
PIC16F18455-I/SP Overview
An 8-bit microcontroller is a single-chip computer built around an 8-bit data path, integrating a CPU, Flash program memory, SRAM, and a rich set of peripherals such as ADCs, timers, communication interfaces, and Core Independent Peripherals (CIPs). The PIC16F18455 sits within the larger taxonomy of microcontrollers -> 8-bit MCUs -> PIC16 family -> PIC16F184xx sub-family -> 16KB-Flash low-pin-count devices. It is widely used where deterministic real-time control, low active and sleep power, and compact analog integration matter more than raw MIPS.
Key features include 14KB (8K x 14 words) self-programmable Flash, 1KB RAM, 256-byte EEPROM, a 12-bit ADC with Computation (ADCC), 10-bit DAC, two PWMs, a Complementary Waveform Generator (CWG), EUSART, SPI, I2C, and a configurable Logic Cell. The 12-bit ADCC supports automated averaging, threshold comparison, and hardware accumulator, offloading signal conditioning from the CPU.
Architecturally, the PIC16F18455 uses an enhanced mid-range 8-bit core with a 14-bit instruction word and a hardware multiplier, enabling C-compiled firmware at 32MHz while retaining PIC predictability. XLP technology drives active currents to the sub-100 Β΅A/MIPS range and sleep currents below ~50 nA typical, supporting battery-sourced and energy-harvesting products.
Typical applications include low-power IoT sensor nodes, consumer white goods, HVAC controls, battery-powered instrumentation, LED lighting controllers, and industrial sensor signal conditioning. Designers benefit from the combination of 12-bit analog accuracy and tiny quiescent draw in a single through-hole device.
When designing, select the -I variant (industrial, -40C to +85C) for non-automotive deployments and the -E variant for extended temperature grades. Decoupling 100nF ceramic capacitors at every VDD/VSS pair and a 10Β΅F bulk cap near the MCU are recommended for ADCC noise performance.
This page synthesizes real distributor pricing as of 2026-09-20, drop-in same-package alternatives, and practical design guidance beyond what appears in the manufacturer datasheet.
Drop-in alternatives for PIC16F18455-I/SP 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 PIC16F18455-I/SP (same form factor and footprint) β differing in Core Architecture, I/O Pins, MSL Level, Package, ADC.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F18455-E/SP
β Drop-Inπ Reference alternative (not in catalog)
PIC16F18446-I/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16F18446-I/GZ
β Drop-Inβ In Stock
$1.1 / Unit
View Datasheet βPIC16F18445-I/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16F18426-I/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16F18346-I/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16F18455-I/SP Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC enhanced mid-range (14-bit instruction word) |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 1 KB |
| EEPROM | 256 bytes |
| Max CPU Frequency | 32 MHz |
| Supply Voltage (VDD) | 2.5 V to 5.5 V |
| Operating Temperature (I grade) | -40 C to +85 C |
| I/O Pins | 25 (max) |
| ADC | 12-bit ADCC with Computation, up to 24 channels |
| DAC | 10-bit, 1 channel |
| Timers | 5x 8/16-bit timers |
| PWM | 2x 10-bit PWM |
| Communication | EUSART, SPI, I2C |
| Package | 28-pin SPDIP (0.300", 7.62 mm) |
| Mounting Type | Through-Hole |
| MSL Level | 1 (not moisture sensitive) |
| RoHS Status | Compliant |
| Lead-Free / Halogen-Free | Yes / Yes |
| eXtreme Low-Power (XLP) | Yes, sub-100 uA/MIPS active, ~50 nA sleep typical |
PIC16F18455-I/SP Pin Configuration
| Pin 1 | MCLR/VPP β Master Clear (reset, active low) / ICSP programming voltage |
| Pin 2 | RA0 β Digital I/O / analog input AN0 |
| Pin 3 | RA1 β Digital I/O / analog input AN1 |
| Pin 4 | RA2 β Digital I/O / analog input AN2 |
| Pin 5 | RA3 β Digital I/O / analog input AN3 / VREF+ |
| Pin 6 | RA4 β Digital I/O / analog input AN4 |
| Pin 7 | RA5 β Digital I/O / analog input AN5 |
| Pin 8 | VSS β Ground |
| Pin 9 | RA7 β Digital I/O / oscillator input |
| Pin 10 | RA6 β Digital I/O / oscillator output |
| Pin 11 | RC0 β Digital I/O |
| Pin 12 | RC1 β Digital I/O |
| Pin 13 | RC2 β Digital I/O |
| Pin 14 | RC3 β Digital I/O / SPI/I2C clock |
| Pin 15 | RC4 β Digital I/O / SPI/I2C data |
| Pin 16 | RC5 β Digital I/O |
| Pin 17 | RC6 β Digital I/O / EUSART TX |
| Pin 18 | RC7 β Digital I/O / EUSART RX |
| Pin 19 | VSS β Ground |
| Pin 20 | VDD β Positive supply voltage |
| Pin 21 | RB0 β Digital I/O / interrupt-on-change |
| Pin 22 | RB1 β Digital I/O / interrupt-on-change |
| Pin 23 | RB2 β Digital I/O / interrupt-on-change |
| Pin 24 | RB3 β Digital I/O / interrupt-on-change |
| Pin 25 | RB4 β Digital I/O / interrupt-on-change |
| Pin 26 | RB5 β Digital I/O / interrupt-on-change |
| Pin 27 | RB6 β Digital I/O / ICSPCLK (programming) |
| Pin 28 | RB7 β Digital I/O / ICSPDAT (programming) |
Typical Applications
PIC16F18455-I/SP is suitable for 6 applications: Battery-Powered IoT Sensor Node, Industrial HVAC Sensor Conditioning, Consumer White Goods Control Board, LED Lighting Driver and Color Controller, Portable Medical Monitoring Device, Automotive Aftermarket Accessory Controller.
Battery-Powered IoT Sensor Node
The PIC16F18455-I/SP's eXtreme Low-Power (XLP) technology delivers ~50 nA typical sleep current and sub-100 Β΅A/MIPS active draw, making it ideal for coin-cell or 2x AA battery-powered IoT sensor nodes. Its 12-bit ADCC with hardware averaging directly digitizes thermistor, humidity, or gas-sensor outputs without an external ADC, and the 14KB Flash comfortably hosts a LoRaWAN/Sigfox stack or BLE firmware bridge with room for application logic. Designers route the MCU between sleep and active states via the 32kHz internal Low-Power Timer, extending battery life to multi-year timescales.
Recommended
Industrial HVAC Sensor Conditioning
In industrial HVAC controls the PIC16F18455-I/SP reads 4-20 mA loop transmitters and 0-10 V pressure/temperature sensors via its 12-bit ADCC, then drives 0-10 V actuator outputs via its 10-bit DAC and two 10-bit PWMs. The -I temperature grade (-40C to +85C) covers rooftop and boiler-room environments, while 1KB RAM buffers control-loop data without CPU stall. The 28-SPDIP package remains rework-friendly for field service and supports through-hole screw-terminal PCBs common in building automation.
Recommended
Consumer White Goods Control Board
The PIC16F18455-I/SP suits washing-machine, dishwasher, and refrigerator control boards thanks to its 32MHz enhanced mid-range core (16 MIPS), 14KB Flash for state-machine firmware, and integrated Complementary Waveform Generator (CWG) for motor pre-drive. The 12-bit ADCC samples water-level, temperature, and turbidity sensors with hardware oversampling, offloading the CPU for user-interface handling. EUSART, SPI, and I2C connect to LED drivers, display modules, and Wi-Fi/BLE modules for smart-appliance connectivity.
Recommended
LED Lighting Driver and Color Controller
The PIC16F18455-I/SP's two 10-bit PWMs and the Complementary Waveform Generator (CWG) provide synchronized LED dimming and color-mixing across multiple channels. Its 12-bit ADCC monitors LED current via sense resistors, enabling closed-loop brightness regulation without an external op-amp. XLP sleep current keeps the controller draw below 1 Β΅A in standby, satisfying Energy Star and EU eco-design standby limits. The 28-SPDIP package suits through-hole lighting PCBs and high-voltage creepage requirements.
Recommended
Portable Medical Monitoring Device
For portable pulse-oximeter, glucometer, and patient-wearable designs, the PIC16F18455-I/SP delivers 12-bit ADC precision for SpO2 photodiode signals, plus an integrated 10-bit DAC for sensor bias generation. XLP technology keeps the active duty cycle minimal for multi-day wearable battery life, and the 14KB Flash stores the display driver and BLE communication stack. The -I/SP industrial temperature grade covers body-worn thermal environments; the small SPDIP footprint simplifies low-volume medical device prototyping and IEC 60601-1 safety-clearance layouts.
Recommended
Automotive Aftermarket Accessory Controller
The PIC16F18455-I/SP serves in aftermarket automotive accessories such as alarm systems, auxiliary lighting controllers, and infotainment panel interfaces where AEC-Q100 is not mandated. The industrial -40C to +85C grade handles cabin temperatures, and the -E/SP variant extends to +125C for underhood deployments. EUSART and SPI connect to GPS, cellular, or RF receiver modules, while the 12-bit ADCC monitors battery voltage and current for power-management logic. PIC heritage toolchain and ICSP support fast firmware iteration in low-volume automotive aftermarket production.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18455-I/SP β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18455-E/SP | PIC16F18446-I/P | PIC16F18445-I/P | PIC16F18426-I/P | PIC16F18346-I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP (through-hole) | 28-SPDIP - same | 28-PDIP - same | 28-PDIP - same | 28-PDIP - same | 28-PDIP - same |
| Flash Memory | 14 KB | 14 KB | 16 KB | 8 KB | 28 KB | 28 KB |
| RAM | 1 KB | 1 KB | 1.5 KB | 1 KB | 2 KB | 2 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Max CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| ADC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 10-bit ADC | 12-bit ADC |
| Operating Temperature | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Industrial temperature grade with full toolchain support (vs PIC16F18346-I/P)
- Larger Flash than 8KB cousin at same package (vs PIC16F18445-I/P)
- Industrial -40C to +85C vs E-grade -40C to +125C (vs PIC16F18455-E/SP)
Design Notes
Estimated: at 32 MHz active draw ~3.5 mA at 3.3 V. Place a 100 nF ceramic decoupling capacitor within 3 mm of each VDD/VSS pair, plus a 10 Β΅F bulk aluminum-polymer or ceramic cap near the MCU. For XLP sleep designs, use the Low-Power Timer (T1LP) instead of the main Timer1 to keep wake-up below 1 Β΅A. Verified Web Data did not include exact active current in mA; refer to datasheet DC Characteristics section for guaranteed min/max.
Keep the 12-bit ADCC traces short and guarded by an analog ground plane. Use a separate AVDD/AVSS pair from the digital supply and decouple it with its own 100 nF + 10 Β΅F network. Avoid routing digital switching signals across analog traces to minimize crosstalk. For SPDIP layouts, place ICSP header (5-pin: MCLR, VDD, VSS, RB6, RB7) within 50 mm of the MCU to support PICkit programming in-circuit.
Common mistakes include: (1) tying MCLR directly to VDD - always use the recommended 10 kΞ© pull-up to VDD; (2) omitting the VPP capacitor (typically 100 nF) on MCLR causing programming failures; (3) exceeding 5.5 V on any I/O pin during in-circuit debugging; (4) not configuring CONFIG words to disable unused peripherals (CWG, DAC, PWM) which can raise active current by 200-500 Β΅A. Always set the WDT to OFF or use the windowed mode intentionally.
Compliance Information
Microchip material declaration confirms RoHS, lead-free, halogen-free, and conflict-mineral compliance. Not AEC-Q100 qualified - use PIC16F18455-E/SP at minimum for automotive-adjacent applications, or PIC16F184xx Q-grade variants for full AEC-Q100 requirements.
