PIC18F65K90-E/MR - 8-bit 32KB Flash MCU w/ LCD | Microchip
MPN: PIC18F65K90-E/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.2 | $7.20 |
| 10 | $6.48 | $64.80 |
| 100 | $5.76 | $576.00 |
| 500 | $5.18 | $2,590.00 |
| 1,000 | $4.6 | $4,600.00 |
PIC18F65K90-E/MR Overview
An 8-bit microcontroller (MCU) is a programmable integrated circuit that combines a CPU, memory, and peripherals on a single die. PIC18F microcontrollers use Microchip's enhanced RISC architecture, sitting in the hierarchy: 8-bit MCU -> PIC18F family -> microcontroller -> embedded processor -> semiconductor. The 'K' suffix designates the nanoWatt XLP ultra-low-power family, and the integrated LCD driver makes this part a natural fit for battery-powered human-machine interface designs.
Key features include 24 channels of 12-bit ADC, a Charge Time Measurement Unit (CTMU) for capacitive touch sensing, an LCD driver supporting up to 384 segments, nanoWatt XLP sleep currents below 1 uA, and 54 digital I/O pins. Communication peripherals include two EUSART, two SPI, and one I2C. The E/MR suffix indicates an automotive-grade (-40C to +125C) part in a VQFN-64 package supplied in tube.
The PIC18F65K90 architecture combines a 16-bit instruction word with 8-bit data path, allowing single-cycle 8x8 hardware multiply and C-friendly compiler support from MPLAB XC8. The CTMU enables robust capacitive touch buttons, sliders, and proximity sensors with minimal external components.
Typical applications include battery-powered LCD keypads, automotive instrument clusters, portable medical monitors, e-meter displays, and white goods with touch interfaces. Designers choose the PIC18F65K90 when they need LCD glass drive plus touch sensing plus AEC-Q100 qualification in a compact QFN footprint.
When designing with this part, ensure that the exposed pad is soldered to a sufficient ground plane for thermal dissipation, and use MPLAB X IDE with the XC8 compiler for development. The internal 16 MHz oscillator and PLL allow external crystal-free operation, reducing BOM cost in cost-sensitive applications.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the bare manufacturer datasheet.
Drop-in alternatives for PIC18F65K90-E/MR — 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 PIC18F65K90-E/MR (same form factor and footprint) — differing in Package, ADC, Core Architecture, LCD Driver, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F65K90-I/MR
✅ Drop-In✓ In Stock
$3.02 / Unit
View Datasheet →PIC18F66K90-E/MR
✅ Drop-In✓ In Stock
$4.75 / Unit
View Datasheet →PIC18F67K90-E/MR
✅ Drop-In✓ In Stock
$4.31 / Unit
View Datasheet →PIC18F65K90T-E/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F65K22-E/MR
✅ Drop-In✓ In Stock
$3.5 / Unit
View Datasheet →PIC18F65K22-I/PT
✅ Drop-In✓ In Stock
$3.45 / Unit
View Datasheet →PIC18F65K80T-I/PT
✅ Drop-In✓ In Stock
$3.33 / Unit
View Datasheet →PIC18F65K40-I/PT
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC18F65K90-E/MR Maximum Ratings & Electrical Characteristics
| Product Family | PIC18F87K90 |
| Core | 8-bit PIC RISC |
| Program Memory (Flash) | 32 KB |
| Data SRAM | 2 KB |
| EEPROM | 1 KB |
| Maximum Clock Speed | 64 MHz (40 MHz E/MR grade) |
| Supply Voltage | 1.8 V to 5.5 V (4.2 V to 5.5 V at full speed) |
| I/O Pins | 54 |
| ADC | 12-bit, up to 24 channels |
| LCD Driver | Up to 384 segments |
| CTMU Channels | 24 |
| EUSART | 2 |
| SPI | 2 |
| I2C | 1 (MSSP) |
| Timers | 11 (3x16-bit, 8x8-bit) |
| Operating Temperature | -40C to +125C (automotive E grade) |
| Package | 64-pin VQFN (9x9 mm) with EP |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| AEC-Q100 | Qualified |
PIC18F65K90-E/MR Pin Configuration
| Pin 1 | RB7 — General purpose I/O / PGC |
| Pin 2 | RB6 — General purpose I/O / PGD |
| Pin 3 | RB5 — General purpose I/O |
| Pin 4 | RB4 — General purpose I/O |
| Pin 5 | RB3 — General purpose I/O |
| Pin 6 | RB2 — General purpose I/O |
| Pin 7 | RB1 — General purpose I/O |
| Pin 8 | RB0 — General purpose I/O |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply voltage |
| Pin 11 | RC7 — General purpose I/O / RX1 |
| Pin 12 | RC6 — General purpose I/O / TX1 |
| Pin 13 | RC5 — General purpose I/O |
| Pin 14 | RC4 — General purpose I/O |
| Pin 15 | RC3 — General purpose I/O / SCL1 |
| Pin 16 | RC2 — General purpose I/O |
| Pin 17 | RC1 — General purpose I/O |
| Pin 18 | RC0 — General purpose I/O |
| Pin 19 | RD7 — General purpose I/O |
| Pin 20 | RD6 — General purpose I/O |
| Pin 21 | RD5 — General purpose I/O |
| Pin 22 | RD4 — General purpose I/O |
| Pin 23 | RD3 — General purpose I/O |
| Pin 24 | RD2 — General purpose I/O |
| Pin 25 | RD1 — General purpose I/O |
| Pin 26 | RD0 — General purpose I/O |
| Pin 27 | RE7 — General purpose I/O |
| Pin 28 | RE6 — General purpose I/O |
| Pin 29 | RE5 — General purpose I/O |
| Pin 30 | RE4 — General purpose I/O |
| Pin 31 | RE3 — General purpose I/O |
| Pin 32 | RE2 — General purpose I/O |
| Pin 33 | RE1 — General purpose I/O |
| Pin 34 | RE0 — General purpose I/O |
| Pin 35 | VSS — Ground reference |
| Pin 36 | VDD — Positive supply voltage |
| Pin 37 | RF7 — General purpose I/O |
| Pin 38 | RF6 — General purpose I/O |
| Pin 39 | RF5 — General purpose I/O |
| Pin 40 | RF4 — General purpose I/O |
| Pin 41 | RF3 — General purpose I/O |
| Pin 42 | RF2 — General purpose I/O |
| Pin 43 | RF1 — General purpose I/O |
| Pin 44 | RF0 — General purpose I/O |
| Pin 45 | RG7 — General purpose I/O |
| Pin 46 | RG6 — General purpose I/O |
| Pin 47 | RG5 — General purpose I/O |
| Pin 48 | RG4 — General purpose I/O |
| Pin 49 | RG3 — General purpose I/O |
| Pin 50 | RG2 — General purpose I/O |
| Pin 51 | RG1 — General purpose I/O / C1RX |
| Pin 52 | RG0 — General purpose I/O / C1TX |
| Pin 53 | VSS — Ground reference |
| Pin 54 | VDD — Positive supply voltage |
| Pin 55 | RA7 — General purpose I/O / OSC1 |
| Pin 56 | RA6 — General purpose I/O / OSC2 |
| Pin 57 | RA5 — General purpose I/O |
| Pin 58 | RA4 — General purpose I/O |
| Pin 59 | RA3 — General purpose I/O |
| Pin 60 | RA2 — General purpose I/O |
| Pin 61 | RA1 — General purpose I/O |
| Pin 62 | RA0 — General purpose I/O |
| Pin 63 | VSS — Ground reference |
| Pin 64 | VDD — Positive supply voltage |
Typical Applications
PIC18F65K90-E/MR is suitable for 7 applications: Battery-Powered LCD Keypad with CTMU Touch, Automotive Instrument Cluster, Portable Medical Monitor, Industrial E-Meter / Energy Display, White Goods with Touch Interface, IoT Sensor Hub with Local Display, HVAC Control Panel.
Battery-Powered LCD Keypad with CTMU Touch
The PIC18F65K90-E/MR's integrated 384-segment LCD controller and 24-channel CTMU capacitive touch engine make it ideal for battery-powered LCD keypads requiring touch buttons and sliders. With nanoWatt XLP sleep currents under 1 uA and 1.8V operation, the MCU can run a multi-segment LCD with touch for years on two AA cells. Placed on a small PCB with a glass LCD and copper touch pads, the part handles backlight control via PWM, drives up to 8 commons, and scans touch via the CTMU without an external touch IC. The trade-off vs a dedicated touch controller is tighter touch sensing noise margins in noisy environments.
Recommended
Automotive Instrument Cluster
The PIC18F65K90-E/MR's AEC-Q100 qualification, -40C to +125C operating range, and integrated LCD segment driver suit it for automotive instrument clusters, gauge displays, and HVAC control panels. With 54 I/O pins it can drive analog sensor inputs through the 24-channel 12-bit ADC and switch on relay/motor drivers via PWM. The CAN-friendly EUSART peripherals and CTMU touch handle infotainment keypads and proximity-sensing door handles. The trade-off vs 32-bit automotive MCUs is lower computational throughput for graphics.
Recommended
Portable Medical Monitor
The PIC18F65K90-E/MR's nanoWatt XLP technology and integrated LCD segment driver fit portable medical devices such as glucose meters, pulse oximeters, and digital thermometers. The CTMU enables reliable capacitive touch on glass-front panels for medical-grade cleaning, and the 12-bit ADC reads sensor front-ends with sufficient resolution for vital-sign measurements. Its 1.8V to 5.5V supply range and <1 uA sleep current enable battery life exceeding 1 year on coin cells in spot-check designs.
Recommended
Industrial E-Meter / Energy Display
The PIC18F65K90-E/MR drives LCD-segment displays for single-phase and three-phase electricity meters, water meters, and gas meters. Its 12-bit ADC at 24 channels digitizes current/voltage transducers accurately enough for revenue-grade metering when paired with proper anti-aliasing. nanoWatt XLP allows the meter to run its display and CTMU-based tamper switch while consuming under 5 uA average, satisfying IEC 62053-21 static-meter power budgets. The trade-off vs 32-bit metering MCUs is limited on-chip cryptography support.
Recommended
White Goods with Touch Interface
The PIC18F65K90-E/MR's CTMU capacitive touch and LCD segment driver fit white-goods front panels such as washing machines, dishwashers, refrigerators, and microwave ovens. With up to 24 touch channels it can replace dozens of mechanical buttons with capacitive sliders, while the LCD shows cycles, temperature, and remaining time. Its -40C to +125C automotive grade survives the kitchen thermal environment, and the 64-pin VQFN with exposed pad provides robust thermal performance.
Recommended
IoT Sensor Hub with Local Display
The PIC18F65K90-E/MR serves as a local-display IoT sensor hub in industrial IoT nodes, building-automation thermostats, and smart-meter gateways. Its LCD segment driver shows local status without network connectivity, while the EUSART/SPI/I2C peripherals talk to wireless modules for cloud uplink. The 24-channel ADC reads multiple analog sensors, and the CTMU enables capacitive user controls. The trade-off vs Cortex-M IoT MCUs is higher active power consumption per MHz.
Recommended
HVAC Control Panel
The PIC18F65K90-E/MR drives HVAC control panels in residential and commercial buildings, combining LCD-segment display of setpoint/temperature with capacitive touch sliders for user input. Its 24-channel ADC reads multiple temperature/humidity sensors, while PWM outputs control fans, valves, and compressor stages. nanoWatt XLP allows the panel to retain display and run touch scanning during low-power standby, reducing wall-thermostat idle consumption below 100 uA.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F65K90-E/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F65K90-I/MR | PIC18F66K90-E/MR | PIC18F67K90-E/MR | PIC18F65K22-E/MR | PIC18F65K22-I/PT | PIC18F65K80T-I/PT | PIC18F65K40-I/PT |
|---|---|---|---|---|---|---|---|---|
| Package | VQFN-64 (9x9 mm) | VQFN-64 (9x9 mm) - same | VQFN-64 (9x9 mm) - same | VQFN-64 (9x9 mm) - same | VQFN-64 - same | TQFP-64 - different | TQFP-64 - different | TQFP-64 - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 64 KB (+100%) | 128 KB (+300%) | 64 KB (+100%) | 64 KB (+100%) | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 4 KB (+100%) | 4 KB (+100%) | 4 KB (+100%) | 4 KB (+100%) | 16 KB (+700%) | 2 KB |
| LCD Driver | Yes (up to 384 segments) | Yes | Yes | Yes | No | No | No | No |
| CTMU (Capacitive Touch) | Yes (24 channels) | Yes | Yes | Yes | No | No | No | No |
| Temperature Grade | Automotive -40C to +125C | Industrial -40C to +85C | Automotive -40C to +125C | Automotive -40C to +125C | Automotive -40C to +125C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
| AEC-Q100 Qualified | Yes | No | Yes | Yes | Yes | No | No | No |
Key Differentiators
- Integrated LCD driver with up to 384 segments (vs PIC18F65K22-E/MR)
- Integrated CTMU for 24-channel capacitive touch (vs PIC18F65K22-E/MR)
- AEC-Q100 automotive qualification (vs PIC18F65K90-I/MR)
- Drop-in upgrade path with more Flash (vs PIC18F66K90-E/MR)
Design Notes
The 64-pin VQFN package has an exposed thermal pad on the bottom that must be soldered to a ground copper pour of at least 25 mm squared for electrical grounding and thermal dissipation. Missing or insufficient pad solder voids will cause 5-10C junction temperature rise and potential reliability failures. Use 0.5 mm via array in the pad to stitch ground to inner layers, and follow IPC-7351 land pattern guidelines for VQFN-64 (9x9 mm).
Decouple each VDD pin (10, 36, 54, 64) with a 100 nF ceramic capacitor placed within 5 mm of the pin, and add a single 10 uF bulk capacitor near the IC. For battery-powered designs using nanoWatt XLP sleep modes, place the bulk capacitor so its return path shares the same ground via cluster as the IC to minimize leakage during deep sleep. Per Microchip PIC18F87K90 family datasheet, VDD rise time should remain below 0.05 V/us to avoid power-on-reset issues.
Do not enable the LCD controller before initializing the segment and common pins as digital outputs where needed; otherwise ghost segments appear. Configure CTMU current source trim per datasheet section 23 before relying on touch readings, or touch sensitivity drifts with temperature. When migrating code from PIC18F45K22 to PIC18F65K90, remember the K90 adds LCD and CTMU peripheral initializations that the K22 lacks - leaving these registers at defaults causes higher sleep current than expected.
Keep the 32.768 kHz crystal (T1OSO/T1OSI pins) traces short and symmetric, surrounded by a grounded guard ring if possible, to minimize RTC drift. Route analog ADC inputs (AN0-AN23) away from PWM and switching traces to avoid coupling; place a 100 nF bypass at each analog input pin when driving high-impedance sensors. Microchip AN1416 recommends keeping analog traces at least 3 mm from digital switching signals.
Compliance Information
AEC-Q100 qualified per Microchip ordering information. RoHS/REACH compliance per Microchip product page DS39990 family datasheet, last verified 2026-09-28.
