PIC16F15254-I/STX - 8-Bit MCU, 32MHz, 7KB Flash, 28-VQFN | Microchip
MPN: PIC16F15254-I/STX ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.28 | $12.80 |
| 100 | $1.06 | $106.00 |
| 500 | $0.91 | $455.00 |
| 1,000 | $0.78 | $780.00 |
PIC16F15254-I/STX Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and a mix of analog and digital peripherals. The 8-bit PIC16F family belongs to the broader PIC architecture hierarchy (PIC -> PIC10/12/14/16/18/24/32 -> 8/16/32-bit PIC MCUs -> Microcontroller -> Semiconductor). XLP MCUs add deep-sleep current budgets in the nA-to-uA range, allowing years of operation from a single coin cell when duty-cycled. Within Microchip's catalog, the PIC16F152xx sits between the smaller PIC16F15xx and the larger PIC16F18xx families.
Key features include 7 KB self-programmable Flash, 512 B SRAM, 256 B EEPROM, a 10-bit ADC with internal voltage reference, two PWM modules, two CCP modules, an on-chip temperature indicator, a windowed watchdog timer, Peripheral Pin Select (PPS) for flexible pin mapping, and a hardware Limit Timer (HLT). Communication is served by one EUSART (RS-232/RS-485 capable) and one MSSP that handles both SPI and I2C master/slave modes. The 28-VQFN package exposes up to 25 I/O pins.
Architecturally the device uses a Harvard RISC-style core with a single-cycle 32 MHz instruction cycle, hardware multiplier, and interrupt controller with context save. Microchip's CIPs (CLC, NCO, CWG, DSM) operate independently of the CPU, freeing MIPS for the application and reducing firmware complexity. The PPS module lets designers remap digital peripherals onto most I/O pins post-firmware, simplifying PCB layout.
Typical applications include low-cost sensor nodes, IoT HVAC controls, white goods user interfaces, LED lighting controllers, battery-powered medical accessories, and small industrial automation tiles. The wide operating range (1.8 V to 5.5 V) and XLP sleep currents make it well suited to multi-year battery deployments where the MCU spends most of its time in sleep and wakes briefly to take a measurement.
When designing with this MCU, plan for an external decoupling capacitor network (100 nF plus 1-10 uF bulk), keep analog traces short and guarded for ADC accuracy, and budget for in-circuit serial programming (ICSP) pins on the PCB to retain prototype flexibility. PPS assignments should be finalized before PCB layout because unused pins cannot be reassigned after assembly.
This page synthesizes Microchip datasheet parameters, distributor stock and pricing, pin-compatible alternatives from the same PIC16F152xx family, and practical design notes not all collected on any single manufacturer page.
Drop-in alternatives for PIC16F15254-I/STX — 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 PIC16F15254-I/STX (same form factor and footprint) — differing in Package, Program Memory (Flash), ADC, Core Architecture, Watchdog Timer.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F15254-I/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.55 / Unit
View Datasheet →PIC16F15255-I/STX
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F15244-I/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.85 / Unit
View Datasheet →PIC16F15245T-I/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.84 / Unit
View Datasheet →PIC16F15243-I/REB
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.76 / Unit
View Datasheet →PIC16F15254-I/STX Maximum Ratings & Electrical Characteristics
| Core | PIC16 8-bit RISC |
| Maximum CPU Frequency | 32 MHz |
| Program Memory (Flash) | 7 KB (7K x 8) |
| SRAM | 512 B |
| EEPROM | 256 B |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC | 10-bit, multiple channels |
| PWM Modules | 2 |
| CCP Modules | 2 |
| Communication | 1x EUSART, 1x MSSP (SPI / I2C) |
| I/O Count | Up to 25 (package dependent) |
| Peripheral Pin Select (PPS) | Yes |
| Watchdog Timer | Windowed WDT |
| Package | 28-VQFN (4x4 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| RoHS Status | Compliant |
PIC16F15254-I/STX Pin Configuration
| Pin 1 | RA5 — Digital I/O / analog input / PPS remappable |
| Pin 2 | RA4 — Digital I/O / analog input / PPS remappable |
| Pin 3 | RA3 — Digital I/O / analog input / MCLR |
| Pin 4 | RA2 — Digital I/O / analog input / PPS remappable |
| Pin 5 | RA1 — Digital I/O / analog input / PPS remappable |
| Pin 6 | RA0 — Digital I/O / analog input / PPS remappable |
| Pin 7 | VSS — Ground reference |
| Pin 8 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
| Pin 9 | RA7 — Digital I/O / OSC1 / PPS remappable |
| Pin 10 | RA6 — Digital I/O / OSC2 / PPS remappable |
| Pin 11 | RC5 — Digital I/O / analog input / PPS remappable |
| Pin 12 | RC4 — Digital I/O / analog input / PPS remappable |
| Pin 13 | RC3 — Digital I/O / analog input / SCL (MSSP) / PPS remappable |
| Pin 14 | RC2 — Digital I/O / analog input / SDA (MSSP) / PPS remappable |
| Pin 15 | RC1 — Digital I/O / analog input / PPS remappable |
| Pin 16 | RC0 — Digital I/O / analog input / PPS remappable |
| Pin 17 | RB7 — Digital I/O / ICSP programming data / PPS remappable |
| Pin 18 | RB6 — Digital I/O / ICSP programming clock / PPS remappable |
| Pin 19 | RB5 — Digital I/O / analog input / PPS remappable |
| Pin 20 | RB4 — Digital I/O / analog input / PPS remappable |
| Pin 21 | RB3 — Digital I/O / analog input / PPS remappable |
| Pin 22 | RB2 — Digital I/O / analog input / PPS remappable |
| Pin 23 | RB1 — Digital I/O / analog input / PPS remappable |
| Pin 24 | RB0 — Digital I/O / analog input / INT / PPS remappable |
| Pin 25 | VSS — Ground reference |
| Pin 26 | VDD — Positive supply voltage |
| Pin 27 | RA0 — Secondary I/O pin on VQFN package variant / PPS remappable |
| Pin 28 | EP — Exposed thermal pad - tie to VSS |
Typical Applications
PIC16F15254-I/STX is suitable for 6 applications: Battery-Powered IoT Sensor Node, HVAC Thermostat Controller, White Goods User Interface Board, LED Lighting Controller, Small Industrial Sensor Tile, Portable Medical Accessory.
Battery-Powered IoT Sensor Node
PIC16F15254-I/STX is well-suited for battery-powered IoT sensor nodes because its 1.8 V to 5.5 V supply range lets it run directly from a single Li-ion or 2xAA cell, while XLP deep-sleep currents in the sub-uA range enable multi-year battery life. The 10-bit ADC reads temperature, light, or analog sensors, and the MSSP I2C interface connects to a low-power accelerometer or environmental sensor. The 32 MHz HFINTOSC gives 8 MIPS for sensor fusion when awake, then the MCU drops back to sleep with the windowed WDT handling wake-ups. Seven KB Flash is enough for typical sensor stacks and small LoRaWAN/BLE control libraries.
Recommended
HVAC Thermostat Controller
PIC16F15254-I/STX fits HVAC thermostat controllers thanks to the 10-bit ADC for thermistor/NTC input conditioning and two PWM outputs for fan speed or valve control. The EUSART provides a wired link to a wall-wired HVAC bus, while SPI/I2C drives an LCD character display. PPS lets designers remap peripheral pins after PCB layout, easing the analog/digital partition. At 32 MHz the MCU can run a PID loop and a UI state machine concurrently, and the 256-byte EEPROM stores user setpoints and calibration constants across power cycles.
Recommended
White Goods User Interface Board
PIC16F15254-I/STX is ideal for white goods UI boards (washing machines, dishwashers, ovens) where it scans keypads, drives LED indicators and 7-segment displays, and orchestrates appliance sequencing. The two CCP modules generate PWM for indicator dimming and buzzer tones; the MSSP SPI/I2C talks to a companion LED driver or main controller. Industrial -40C to +85C operation supports under-cabinet and inside-appliance thermal environments. 7 KB Flash is sufficient for menu logic, fault detection, and a small bootloader for field firmware updates.
Recommended
LED Lighting Controller
PIC16F15254-I/STX drives smart LED lighting fixtures using its two PWM channels for warm-white / cool-white dimming or RGB color mixing. The EUSART or I2C interface links to a wireless module (BLE or sub-GHz) for app or wall-switch control. Core Independent Peripherals (CLC, NCO) generate accurate PWM dead-time and dimming curves without CPU intervention, leaving MIPS free for protocol handling. The wide 1.8-5.5 V supply works with constant-current LED drivers fed from 12 V or 24 V rails via a local LDO.
Recommended
Small Industrial Sensor Tile
PIC16F15254-I/STX integrates well into small industrial sensor tiles where it digitizes analog process variables, performs linearization, and exposes the result over RS-485 via the EUSART. The 10-bit ADC with internal voltage reference is adequate for pressure, flow, and level transducers in non-critical-control loops. Industrial temperature rating and the windowed watchdog suit unattended factory-deployed tiles. 256 B EEPROM stores calibration constants per channel; PPS lets the same PCB design serve multiple transducer pinout variants.
Recommended
Portable Medical Accessory
PIC16F15254-I/STX suits portable medical accessories (pulse-oximeter boards, pill-dispenser controllers, nebulizer timers) where low-power, deterministic interrupt latency matter. XLP modes keep standby current below 5 uA so a CR2032 coin cell can power a multi-week dosing timer. The MSSP SPI/I2C connects to medical sensors or a small OLED display; the EUSART exposes a service-port debug link. The 256 B EEPROM safely stores patient history or device counters across battery swaps.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F15254-I/STX — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F15254-I/SS | PIC16F15255-I/STX | PIC16F15244-I/SS | PIC16F15245T-I/SO | PIC16F15243-I/REB |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-VQFN (4x4 mm) | 28-SSOP (family equivalent) | 28-VQFN (4x4 mm) - same | 28-SSOP (family equivalent) | 28-SOIC (family equivalent) | 28-DIP (family equivalent) |
| Core Architecture | PIC16 8-bit RISC, 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 |
| Flash Program Memory | 7 KB | 7 KB | 14 KB (+100%) | 4 KB (-43%) | 14 KB (+100%) | 4 KB (-43%) |
| SRAM | 512 B | 512 B | 1 KB (+100%) | 256 B (-50%) | 512 B | 256 B (-50%) |
| EEPROM | 256 B | 256 B | 256 B | 128 B (-50%) | 256 B | 128 B (-50%) |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| PWM / CCP | 2 PWM + 2 CCP | 2 PWM + 2 CCP | 2 PWM + 2 CCP | 2 PWM + 2 CCP | 2 PWM + 2 CCP | 2 PWM + 2 CCP |
| Communication | EUSART + MSSP (SPI/I2C) | EUSART + MSSP | EUSART + MSSP | EUSART + MSSP | EUSART + MSSP | EUSART + MSSP |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
Key Differentiators
- Smallest Flash option in 28-VQFN 4x4 mm footprint of the PIC16F152xx family (vs PIC16F15255-I/STX (14 KB Flash))
- 256-byte EEPROM on-chip for parameter storage (vs PIC16F15244-I/SS (128 B EEPROM))
- 28-VQFN 4x4 mm - one of the smallest footprints in the PIC16F152xx family (vs PIC16F15245T-I/SO (28-SOIC))
- Includes 2x PWM + 2x CCP in this footprint (vs PIC16F15243-I/REB (28-DIP))
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin, plus a 1 uF to 10 uF bulk capacitor on the same rail. For XLP sleep-current-sensitive designs, choose a low-leakage bulk cap (e.g. ceramic or polymer) - electrolytics can leak tens of uA and dominate the standby budget. Tie both VDD pins on the 28-VQFN together on the PCB to share the same decoupling node.
Keep analog input traces short and guarded by a ground pour to maximize ADC accuracy. Route the ICSP pins (RB6/RB7 on this family) to a 6-pin header even on production boards to retain in-field firmware-update capability. The exposed thermal pad (EP) on the 28-VQFN should be soldered to a ground pad with thermal vias to the inner ground plane for mechanical and thermal reliability.
Configure unused I/O pins as outputs with a defined low level (or inputs with the internal weak pull-up enabled) to minimize sleep current - floating inputs can toggle and draw hundreds of uA. Verify the PPS remapping is finalized BEFORE PCB fabrication because PPS does not change the physical pin footprint. Also confirm MCLR functionality - on PIC16F152xx the MCLR pin is shared with RA3, so disabling MCLR changes the pin's reset behavior.
For I2C lines, add 4.7 kohm to 10 kohm pull-ups on SCL and SDA (not on the MCU). If the bus exceeds 400 kHz or the trace length is over 10 cm, lower the pull-up value or switch to a slower speed. The MSSP module supports SMBus timing, but signal integrity on long buses still requires bus-repeater or buffer ICs in industrial environments.
Compliance Information
RoHS compliance confirmed by Microchip product page and distributor listings (DigiKey, Mouser). Not AEC-Q100 qualified - use the automotive-grade PIC16F15254-E/STX variant for non-automotive extended-temperature use, and AEC-Q100 qualified parts separately for automotive.
