PIC18F43K20-E/MV - 8KB Flash 8-bit MCU, UQFN-40 | Microchip
MPN: PIC18F43K20-E/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.86 | $48.60 |
| 100 | $4.1 | $410.00 |
| 500 | $3.55 | $1,775.00 |
| 1,000 | $3.12 | $3,120.00 |
PIC18F43K20-E/MV Overview
An 8-bit PIC microcontroller (MCU) is a single-chip computer that combines a CPU, non-volatile Flash memory, volatile RAM, and programmable peripherals into one IC. PIC18 devices use an enhanced RISC Harvard architecture with 16-bit instructions and 8-bit data path, sitting in the PIC family hierarchy of PIC10/PIC12/PIC16/PIC18/PIC24/dsPIC and the broader 8-bit microcontroller category. As a member of the power-management IC ecosystem, the PIC18F43K20 provides the computing and control core for embedded designs, with XLP variants specifically tuned for ultra-low-power standby operation where quiescent current dominates battery life.
Key features include 8KB (4K x 16) self-programmable Flash, 768 bytes SRAM, 256 bytes EEPROM, a 10-bit ADC with up to 14 channels, two analog comparators, enhanced CCP, two USART, MSSP (SPI/I2C), and a 16-bit timer with nanoWatt XLP power management. The MV package is a UQFN-40 (6x6 mm) with exposed thermal pad, offering a compact footprint for space-constrained PCB layouts.
The architecture relies on a modified Harvard bus with separate program and data paths, 31-level stack, hardware multiplier, and C-friendly instruction set that allows efficient code generation while maintaining predictable timing. The integrated 10-bit ADC and analog comparators make the part suitable for mixed-signal sensor interfaces without external components.
Typical applications include low-power sensor nodes, battery-powered instrumentation, industrial control modules, automotive body electronics, consumer peripherals, and USB/HID-capable designs (the family supports USB via peripheral derivatives). The wide temperature range also supports outdoor or industrial enclosures.
When designing with this device, ensure the UQFN exposed pad is soldered to a sufficiently large copper pour to meet thermal dissipation and to satisfy the package's electrical ground requirement. Decoupling capacitors must be placed within 3 mm of each power pin for reliable ADC and oscillator operation.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC18F43K20-E/MV — 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 PIC18F43K20-E/MV (same form factor and footprint) — differing in ADC, Package, Communication, Timers, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F43K20-I/MV
✅ Drop-In✓ In Stock
$1.97 / Unit
View Datasheet →PIC18F43K20T-I/MV
✅ Drop-In✓ In Stock
$1.59 / Unit
View Datasheet →PIC18F43K20-E/ML
✅ Drop-In✓ In Stock
$1.38 / Unit
View Datasheet →PIC18F43K20-I/ML
✅ Drop-In✓ In Stock
$2.46 / Unit
View Datasheet →PIC18F43K22-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F43K20-E/PT
✅ Drop-In✓ In Stock
$2.51 / Unit
View Datasheet →PIC18F43K20-E/MV Maximum Ratings & Electrical Characteristics
| Series | PIC18F43K20 (PIC18 XLP) |
| Core Processor | PIC |
| Core Size | 8-bit |
| Program Memory Size | 8 KB (4K x 16) Flash |
| Data RAM Size | 768 bytes |
| EEPROM Size | 256 bytes |
| Maximum CPU Speed | 48 MHz |
| Supply Voltage Range | 1.8 V to 3.6 V |
| Operating Temperature Range | -40 C to +125 C (Extended, -E grade) |
| Package | 40-pin UQFN (MV) with exposed pad, 6x6 mm |
| ADC | 10-bit, multi-channel |
| Communication | I2C, SPI, UART/USART |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18F43K20-E/MV Pin Configuration
| Pin 1 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| Pin 2 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| Pin 3 | RA2/AN2/VREF- — Digital I/O / Analog input / DAC negative reference |
| Pin 4 | RA3/AN3/VREF+ — Digital I/O / Analog input / DAC positive reference |
| Pin 5 | RA5/AN4 — Digital I/O / Analog input channel 4 |
| Pin 6 | RA4 — Digital I/O (open-drain) |
| Pin 7 | RA7/OSC1 — Digital I/O / Crystal oscillator input |
| Pin 8 | RA6/OSC2 — Digital I/O / Crystal oscillator output |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply voltage |
| Pin 11 | RB0/INT0 — Digital I/O / External interrupt 0 |
| Pin 12 | RB1/INT1 — Digital I/O / External interrupt 1 |
| Pin 13 | RB2/INT2 — Digital I/O / External interrupt 2 |
| Pin 14 | RB3/CCP2 — Digital I/O / Capture/Compare/PWM 2 |
| Pin 15 | RB4 — Digital I/O |
| Pin 16 | RB5 — Digital I/O |
| Pin 17 | RB6/PGC — Digital I/O / ICSP clock |
| Pin 18 | RB7/PGD — Digital I/O / ICSP data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RC0 — Digital I/O |
| Pin 22 | RC1 — Digital I/O |
| Pin 23 | RC2 — Digital I/O |
| Pin 24 | RC3 — Digital I/O |
| Pin 25 | RC4 — Digital I/O |
| Pin 26 | RC5 — Digital I/O |
| Pin 27 | RC6 — Digital I/O |
| Pin 28 | RC7 — Digital I/O |
| Pin 29 | VSS — Ground reference |
| Pin 30 | VDD — Positive supply voltage |
| Pin 31 | RD0 — Digital I/O |
| Pin 32 | RD1 — Digital I/O |
| Pin 33 | RD2 — Digital I/O |
| Pin 34 | RD3 — Digital I/O |
| Pin 35 | RD4 — Digital I/O |
| Pin 36 | RD5 — Digital I/O |
| Pin 37 | RD6 — Digital I/O |
| Pin 38 | RD7 — Digital I/O |
| Pin 39 | RE3/MCLR — Digital I/O / Master Clear (reset) |
| Pin 40 | AVSS — Analog ground reference |
Typical Applications
PIC18F43K20-E/MV is suitable for 6 applications: Battery-Powered Sensor Node, Industrial Control Module, Automotive Body Electronics, Consumer Peripheral Controller, Portable Instrumentation, LED Lighting Controller.
Battery-Powered Sensor Node
The PIC18F43K20-E/MV fits battery-powered sensor nodes because its nanoWatt XLP technology delivers sub-microamp sleep current while retaining the 10-bit ADC for analog sensing. With 8 KB Flash and 768 bytes RAM, the part hosts sensor-firmware plus a small protocol stack (e.g., Modbus RTU slave). Placed on a 3.3 V coin-cell rail, the MCU spends most of its time in sleep and wakes via interrupt to take readings, then transmits over UART or SPI before re-entering sleep.
Recommended
Industrial Control Module
The PIC18F43K20-E/MV is well suited to industrial control modules that must operate in -40 C to +125 C environments, such as factory-floor I/O concentrators. The 40-pin UQFN footprint fits space-constrained DIN-rail PCBs, while the 10-bit ADC and analog comparators handle 4-20 mA current-loop and discrete sensor inputs. With 8 KB Flash and 768 bytes RAM, the part supports ladder-logic style firmware plus UART-based fieldbus bridging.
Recommended
Automotive Body Electronics
The PIC18F43K20-E/MV serves in automotive body modules such as lighting controllers and seat-adjustment units, where the +125 C extended temperature rating matches under-hood thermal exposure. The 10-bit ADC reads thermistor inputs, the comparators monitor current-sense thresholds, and the UART/SPI/I2C peripherals connect to LIN or CAN bus transceivers via a companion IC. Placed near the load-driver ICs, the MCU commands relays and PWMs with deterministic timing from the 48 MHz core.
Recommended
Consumer Peripheral Controller
The PIC18F43K20-E/MV drives consumer peripherals such as smart-home sensors, environmental monitors, and USB HID devices. The PIC18 core runs C-friendly code that fits 8 KB Flash, while UART/SPI/I2C link the MCU to radios, displays, or host processors. The nanoWatt XLP keeps idle power low, satisfying Energy Star standby budgets for always-on consumer products.
Recommended
Portable Instrumentation
The PIC18F43K20-E/MV powers portable test and measurement instruments such as handheld multimeters, clamp meters, and insulation testers. Its 10-bit ADC digitizes sensor inputs, while 8 KB Flash holds calibration routines and 768 bytes RAM buffers measurement samples. The extended -40 C to +125 C temperature range supports outdoor or industrial field use where instruments are exposed to ambient swings.
Recommended
LED Lighting Controller
The PIC18F43K20-E/MV works as an LED lighting controller for architectural and signage applications, where it generates PWM dimming and color-mixing signals. The 16-bit timer and enhanced CCP module produce high-resolution PWM, while UART/SPI accept DMX-512 or wireless-bridge commands. The +125 C rating supports outdoor fixture enclosures, and the 40-pin UQFN footprint fits compact driver PCBs.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F43K20-E/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F43K20-I/MV | PIC18F43K20T-I/MV | PIC18F43K20-E/ML | PIC18F43K20-I/ML | PIC18F43K22-I/P |
|---|---|---|---|---|---|---|
| Package | UQFN-40 (MV) 6x6 mm | UQFN-40 (MV) - same | UQFN-40 (MV) - same | QFN-44 (ML) - different | QFN-44 (ML) - different | PDIP-40 (P) - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Temperature Grade | Extended (-40 to +125 C) | Industrial (-40 to +85 C) | Industrial (-40 to +85 C) | Extended (-40 to +125 C) | Industrial (-40 to +85 C) | Industrial (-40 to +85 C) |
| Program Memory | 8 KB Flash | 8 KB Flash | 8 KB Flash | 8 KB Flash | 8 KB Flash | 8 KB Flash |
| Data RAM | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 768 bytes |
| Maximum CPU Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 64 MHz |
| Supply Voltage Range | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 5.5 V |
| Approx. Unit Price (qty 100) | $4.10 (as of 2026-09-27) | $3.85 (as of 2026-09-27) | $3.85 (as of 2026-09-27) | $4.20 (as of 2026-09-27) | $4.05 (as of 2026-09-27) | $3.95 (as of 2026-09-27) |
Key Differentiators
- Extended +125 C temperature grade in compact UQFN-40 (vs PIC18F43K20-I/MV)
- UQFN-40 6x6 mm surface-mount footprint (vs PIC18F43K22-I/P)
- nanoWatt XLP sub-microamp sleep current (vs PIC18F25K50T-I/SS)
Design Notes
The PIC18F43K20-E/MV UQFN-40 package has an exposed thermal pad (EP) that MUST be soldered to a PCB ground pour of at least 16 mm^2 to meet thermal and electrical ground requirements. Place at least one 0.1 uF decoupling capacitor within 3 mm of every VDD pin (pins 10, 20, 30); add a bulk 10 uF tantalum or ceramic capacitor near the supply entry. For ADC accuracy, place a ferrite bead or small resistor between digital VDD and analog AVDD supply traces.
Estimated: at 48 MHz CPU speed, 3.3 V supply, and typical active current of 10 mA, the PIC18F43K20-E/MV dissipates roughly 33 mW. With UQFN-40 theta_JA of approximately 35 C/W (per the Microchip package thermal data), the junction temperature rise is about 1.2 C above ambient - well within the +125 C extended limit. Derating is not a practical concern unless the part is mounted in an enclosed, unventilated enclosure; in that case, route the EP pour to multiple copper layers with thermal vias.
For reliable ICSP programming via RB6/PGC and RB7/PGD, route these traces away from switching noise sources and keep them shorter than 50 mm. Add 4.7 kohm pull-ups on SDA/SCL lines for I2C, and 10 kohm pull-ups on MCLR to ensure the part does not enter reset spuriously during power-up. Use guarded routing for analog inputs AN0-AN4 to avoid coupling digital switching noise into ADC measurements.
Do not confuse the -E temperature suffix (extended -40 to +125 C) with the -I suffix (industrial -40 to +85 C) when ordering; the PIC18F43K20-E/MV and PIC18F43K20-I/MV share the same UQFN-40 footprint but differ in upper temperature. The /MV suffix denotes the UQFN package; /ML denotes the larger QFN-44 with similar pinout. Do not attempt to source PIC18F43K20-E/MV from unauthorized brokers without verifying the lot code - counterfeit PIC18 parts have been reported in the grey market.
Compliance Information
RoHS and lead-free confirmed per Microchip product page. PIC18F43K20-E/MV is not AEC-Q100 qualified; the -E suffix denotes extended commercial/industrial temperature grade only, not automotive qualification. For AEC-Q100 designs, select PIC18F automotive-grade siblings such as PIC18F46K80-I/PT.
