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Microchip Technology PIC16F18456-I/STX — Microcontrollers & Processors (MCU / MPU / DSP)

PIC16F18456-I/STX 8-bit MCU, 32 MHz, 28 KB Flash, 28-VQFN

MPNPIC16F18456-I/STX
Active

Microchip PIC® XLP™ 16F series PIC16F18456-I/STX, 8-bit MCU, 32 MHz, 28 KB Flash, 2K x 8 RAM, 256 x 8 EEPROM, 28-VFQFN Exposed Pad, -40°C to 85°C.

$1.7600Ref. price · indicative, final on quote
Microchip Technology PIC16F18456-I/STX datasheet (PDF)
Packaging28-VFQFN Exposed Pad
RoHSROHS3 Compliant
SeriesPIC® XLP™ 16F
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

PIC16F18456-I/STX specifications
ParameterValue
SeriesPIC® XLP™ 16F
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2.5V ~ 5.5V
Operating temperature-40°C ~ 85°C (TA)
Speed32MHz
PackageTube
RAM size2K x 8
Core size8-Bit
EEPROM size256 x 8
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityEUSART, I2C, LINbus, MSSP, SMBus/PMBus, RS-232, RS-485, SPI, UART/USART
Number of i (O)26
Core processorPIC
Case28-VFQFN Exposed Pad
Data convertersA/D 24x12b; D/A 1x5b
Program memory size28KB (16K x 14)

Product details

The Microchip PIC16F18456-I/STX is an 8-bit PIC MCU from the XLP 16F family, built around a 32 MHz internal oscillator. The 24-channel 12-bit ADC and a single 5-bit DAC let it handle analog sensor inputs directly, reducing external signal-chain parts. Serial connectivity spans EUSART, I2C, SPI, LINbus, RS-232/485, and SMBus/PMBus, so it can bridge to industrial fieldbuses or a host processor without extra transceivers in many cases.

28-VQFN with exposed pad — layout and thermal considerations

The part comes in a 28-VFQFN Exposed Pad package (4x4 mm body).

It is ROHS3 compliant. The base number PIC16F18456 covers multiple package and temperature variants, so a design can migrate to a different package option without a full requalification.

Sourcing posture

The active lifecycle means the factory channel is still producing, so lead times tend to be predictable for volume commitments.

Frequently asked questions

Is the PIC16F18456 obsolete or active?

It is safe for new designs and long-term production without a last-time-buy deadline.

What is the memory size of PIC16F18456?

The PIC16F18456 has 28 KB of Flash program memory, 2 KB of SRAM, and 256 bytes of EEPROM. The EEPROM is separate from the Flash, so you can store calibration data without wearing the program memory.

What are the alternatives to PIC16F18456?

A close functional alternative within the same XLP 16F family is the PIC16LF1559-I/SS, which also runs at 32 MHz and includes I²C, SPI, and UART, but it has 17 I/O, a 10-bit ADC, and operates down to 1.8 V.