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Microchip Technology PIC18F55Q43-E/6LX — Microcontrollers & Processors (MCU / MPU / DSP)

Microchip PIC18F55Q43-E/6LX 8-bit MCU, 64MHz, 32KB Flash

MPNPIC18F55Q43-E/6LX
Active

Microchip PIC® XLP™ 18F series, PIC18F55Q43-E/6LX, 8-bit MCU, 64MHz, 32KB Flash, 2K x 8 RAM, 1K x 8 EEPROM, 44 I/O, I²C/LINbus/SPI/UART/USART, A/D 43x12b; D/A 1x8b, -40°C~125°C, 48-VFQFN Exposed Pad.

$2.3700Ref. price · indicative, final on quote
Microchip Technology PIC18F55Q43-E/6LX datasheet (PDF)
Packaging48-VFQFN Exposed Pad
RoHSROHS3 Compliant
SeriesPIC® XLP™ 18F
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

PIC18F55Q43-E/6LX specifications
ParameterValue
SeriesPIC® XLP™ 18F
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.8V ~ 5.5V
Operating temperature-40°C~125°C(TA)
Speed64MHz
PackageTube
RAM size2K x 8
Core size8-Bit
EEPROM size1K x 8
PeripheralsBrown-out Detect/Reset, LVD, POR, PWM, WDT
ConnectivityI²C, LINbus, SPI, UART/USART
Number of i (O)44
Core processorPIC
Case48-VFQFN Exposed Pad
Data convertersA/D 43x12b; D/A 1x8b
Program memory size32KB (32K x 8)

Product details

64 MHz 8-bit core in a 48-VQFN — what the extended temp range means for fit

The Microchip PIC18F55Q43-E/6LX is an 8-bit PIC MCU from the PIC® XLP™ 18F series, clocked at 64 MHz with 32 KB Flash program memory, 2 KB RAM, and 1 KB EEPROM.

Microchip lists the PIC18F55Q43-E/6LX as Active.

32 KB Flash with 1 KB EEPROM — firmware-update and calibration storage

The 32 KB Flash (32K x 8) is sized for moderate-complexity control loops, bootloaders, and protocol stacks. The separate 1 KB EEPROM (1K x 8) holds calibration coefficients, node IDs, and fault logs without wearing the Flash — useful when the product's service life exceeds the Flash endurance on frequent writes. Brown-out detect, low-voltage detect, POR, PWM, and WDT are integrated peripherals, so the design can skip external supervisor ICs for basic watchdog and power-fail handling.

Frequently asked questions

What programmer is required for PIC18F55Q43-E/6LX?

The PIC18F55Q43 family uses Microchip's standard ICSP (In-Circuit Serial Programming) interface on the PGD/PGC pins. Any PIC-compatible programmer that supports the PIC18F enhanced core — such as the PICkit 4, ICD 5, or MPLAB Snap — will program this device. The debug interface is the same two-wire ICSP, no special adapter needed for the 48-VQFN package.