PIC18F65K90T-I/MRRSL - 32KB Flash 8-bit MCU with LCD Driver
MPN: PIC18F65K90T-I/MRRSL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.42 | $6.42 |
| 10 | $5.78 | $57.80 |
| 100 | $5.13 | $513.00 |
| 500 | $4.61 | $2,305.00 |
| 1,000 | $4.1 | $4,100.00 |
PIC18F65K90T-I/MRRSL Overview
An 8-bit microcontroller is a single-chip computer that processes data in 8-bit words and integrates CPU, RAM, non-volatile program memory, and peripherals on one die. PIC18F-series MCUs sit within the broader Microcontroller -> Microcontroller IC -> Integrated Circuit taxonomy. Compared to 16-bit or 32-bit alternatives, 8-bit parts trade raw throughput for deterministic interrupt latency, lower cost, and ultra-low sleep current suitable for battery-powered designs.
Key features include 53 digital I/O pins, a Charge Time Measurement Unit (CTMU) supporting up to 24 channels of capacitive touch sensing, an LCD driver with up to 192 segments, multiple serial interfaces (UART, SPI, I2C), and 12-bit ADC. nanoWatt XLP technology provides deep-sleep currents below 100 nA, enabling years of battery life on coin cells. The 64-pin VQFN package exposes a thermal pad for improved heat spreading.
Typical applications include battery-powered consumer electronics with segmented LCD displays, capacitive touch human-machine interfaces, medical glucose meters, e-bike and fitness instruments, and metering pumps. The combination of LCD driver and capacitive touch eliminates the need for separate display and touch controller ICs, reducing BOM cost and PCB area in space-constrained designs.
Industrial temperature grade parts operate from -40C to +85C ambient and require a 1.8V to 3.6V supply rail. Microchip's MPLAB X IDE and XC8 compiler provide a complete development toolchain. The device ships in Tape & Reel packaging for high-volume SMT assembly.
This page synthesizes distributor pricing, same-brand drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC18F65K90T-I/MRRSL — 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 PIC18F65K90T-I/MRRSL (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Core Architecture, LCD Driver.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F65K90T-I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.95 / Unit
View Datasheet →PIC18F65K90-I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.02 / Unit
View Datasheet →PIC18F65K90-E/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.6 / Unit
View Datasheet →PIC18F65K80T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.33 / Unit
View Datasheet →PIC18F65K40-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.55 / Unit
View Datasheet →PIC18F65K90T-I/MRRSL Maximum Ratings & Electrical Characteristics
| Core | PIC18 8-bit |
| Program Memory Size | 32KB (16K x 16) FLASH |
| RAM Size | 2KB |
| EEPROM Size | 1KB |
| Maximum Clock Frequency | 64 MHz |
| Number of I/O | 53 |
| Package / Case | 64-VFQFN Exposed Pad (9x9 mm) |
| Oscillator Type | Internal |
| Supply Voltage | 1.8V to 3.6V |
| Operating Temperature | -40C to +85C |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel |
| LCD Driver | Integrated, up to 192 segments |
| Capacitive Touch Channels (CTMU) | Up to 24 |
| RoHS Status | Compliant |
PIC18F65K90T-I/MRRSL Pin Configuration
| Pin 1 | RB5/KBI3/SEG13/AN13/C1IND — Port B bit 5 / Keyboard interrupt / LCD segment 13 / ADC analog input 13 |
| Pin 2 | RB4/KBI2/SEG12/AN11/C1INC — Port B bit 4 / Keyboard interrupt / LCD segment 12 / ADC analog input 11 |
| Pin 3 | RB3/KBI1/SEG11/AN9/C1INA — Port B bit 3 / Keyboard interrupt / LCD segment 11 / ADC analog input 9 |
| Pin 4 | RB2/KBI0/SEG10/AN8 — Port B bit 2 / Keyboard interrupt / LCD segment 10 / ADC analog input 8 |
| Pin 5 | RB1/SEG9/AN10/C1INB — Port B bit 1 / LCD segment 9 / ADC analog input 10 |
| Pin 6 | RB0/SEG8/AN12 — Port B bit 0 / LCD segment 8 / ADC analog input 12 |
| Pin 7 | VDD — Positive supply voltage (1.8V to 3.6V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA7/OSC1/CLKI — Port A bit 7 / Oscillator input / External clock input |
| Pin 10 | RA6/OSC2/CLKO — Port A bit 6 / Oscillator output / Clock output |
| Pin 11 | RC0/SOSCO — Port C bit 0 / Secondary oscillator output |
| Pin 12 | RC1/SOSCI — Port C bit 1 / Secondary oscillator input |
| Pin 13 | RC2/CCP1 — Port C bit 2 / Capture/Compare/PWM 1 |
| Pin 14 | RC3/SCL — Port C bit 3 / I2C clock |
| Pin 15 | RC4/SDA — Port C bit 4 / I2C data |
| Pin 16 | RC5/SDO — Port C bit 5 / SPI data out |
| Pin 17 | RC6/TX/CK — Port C bit 6 / UART TX / clock |
| Pin 18 | RC7/RX/DT — Port C bit 7 / UART RX / data |
| Pin 19 | RD0/SEG0 — Port D bit 0 / LCD segment 0 |
| Pin 20 | RD1/SEG1 — Port D bit 1 / LCD segment 1 |
| Pin 21 | RD2/SEG2 — Port D bit 2 / LCD segment 2 |
| Pin 22 | RD3/SEG3 — Port D bit 3 / LCD segment 3 |
| Pin 23 | RD4/SEG4 — Port D bit 4 / LCD segment 4 |
| Pin 24 | RD5/SEG5/CCP2 — Port D bit 5 / LCD segment 5 / Capture/Compare/PWM 2 |
| Pin 25 | RD6/SEG6 — Port D bit 6 / LCD segment 6 |
| Pin 26 | RD7/SEG7 — Port D bit 7 / LCD segment 7 |
| Pin 27 | VSS — Ground reference |
| Pin 28 | VDD — Positive supply voltage |
| Pin 29 | RE0/AN5/SEG32 — Port E bit 0 / ADC analog input 5 / LCD segment 32 |
| Pin 30 | RE1/AN6/SEG33 — Port E bit 1 / ADC analog input 6 / LCD segment 33 |
| Pin 31 | RE2/AN7/SEG34 — Port E bit 2 / ADC analog input 7 / LCD segment 34 |
| Pin 32 | RE3/SEG35 — Port E bit 3 / LCD segment 35 |
| Pin 33 | RA0/AN0/ULPWU — Port A bit 0 / ADC analog input 0 / Ultra Low Power Wake-up |
| Pin 34 | RA1/AN1 — Port A bit 1 / ADC analog input 1 |
| Pin 35 | RA2/AN2 — Port A bit 2 / ADC analog input 2 |
| Pin 36 | RA3/AN3/VREF+ — Port A bit 3 / ADC analog input 3 / Positive voltage reference |
| Pin 37 | RA4/AN4 — Port A bit 4 / ADC analog input 4 |
| Pin 38 | RA5/AN5 — Port A bit 5 / ADC analog input 5 |
| Pin 39 | VSS — Ground reference |
| Pin 40 | VDD — Positive supply voltage |
| Pin 41 | RF0/SEG36 — Port F bit 0 / LCD segment 36 |
| Pin 42 | RF1/SEG37 — Port F bit 1 / LCD segment 37 |
| Pin 43 | RF2/SEG38 — Port F bit 2 / LCD segment 38 |
| Pin 44 | RF3/SEG39 — Port F bit 3 / LCD segment 39 |
| Pin 45 | RF4/SEG40 — Port F bit 4 / LCD segment 40 |
| Pin 46 | RF5/SEG41 — Port F bit 5 / LCD segment 41 |
| Pin 47 | RF6/SEG42 — Port F bit 6 / LCD segment 42 |
| Pin 48 | RF7/SEG43 — Port F bit 7 / LCD segment 43 |
| Pin 49 | RG0/SEG44 — Port G bit 0 / LCD segment 44 |
| Pin 50 | RG1/SEG45 — Port G bit 1 / LCD segment 45 |
| Pin 51 | RG2/SEG46 — Port G bit 2 / LCD segment 46 |
| Pin 52 | RG3/SEG47 — Port G bit 3 / LCD segment 47 |
| Pin 53 | RG4/SEG48 — Port G bit 4 / LCD segment 48 |
| Pin 54 | MCLR — Master Clear reset input (active low) |
| Pin 55 | RH0/SEG58 — Port H bit 0 / LCD segment 58 |
| Pin 56 | RH1/SEG59 — Port H bit 1 / LCD segment 59 |
| Pin 57 | RH2/SEG60 — Port H bit 2 / LCD segment 60 |
| Pin 58 | RH3/SEG61 — Port H bit 3 / LCD segment 61 |
| Pin 59 | RH4/SEG62 — Port H bit 4 / LCD segment 62 |
| Pin 60 | RH5/SEG63 — Port H bit 5 / LCD segment 63 |
| Pin 61 | RH6/SEG64 — Port H bit 6 / LCD segment 64 |
| Pin 62 | RH7/SEG65 — Port H bit 7 / LCD segment 65 |
| Pin 63 | VSS — Ground reference |
| Pin 64 | VDD — Positive supply voltage |
Typical Applications
PIC18F65K90T-I/MRRSL is suitable for 6 applications: Battery-Powered Consumer Electronics with LCD, Capacitive Touch Human-Machine Interfaces, Medical Glucose and Health Meters, Industrial Metering and Pump Controllers, Automotive Accessory and Aftermarket Devices, Smart Home Sensor Hubs with Local Display.
Battery-Powered Consumer Electronics with LCD
The PIC18F65K90T-I/MRRSL is purpose-built for battery-powered consumer devices with segmented LCD displays such as e-bike computers, fitness trackers, and portable media players. Its integrated LCD driver supports up to 192 segments, eliminating the need for an external display controller IC and reducing BOM cost. The nanoWatt XLP technology delivers deep-sleep currents below 100 nA per Microchip datasheet, enabling multi-year battery life on coin cells. Operating from 1.8V to 3.6V, the device is compatible with single-cell Li-ion and two-cell AA battery rails commonly used in portable consumer products. The 32KB Flash and 2KB SRAM provide ample code space for graphics rendering and user interface logic in cost-sensitive consumer designs.
Recommended
Capacitive Touch Human-Machine Interfaces
The PIC18F65K90T-I/MRRSL integrates a Charge Time Measurement Unit (CTMU) supporting up to 24 capacitive touch channels, enabling buttons, sliders, and proximity sensors without dedicated touch controller ICs. This eliminates external touch hardware and reduces PCB area in appliance control panels, smart thermostats, and industrial HMI terminals. The CTMU measures capacitance changes via charge-time digitization, providing reliable touch detection even through glass overlays up to several millimeters thick. Combined with the LCD driver, the MCU enables full touch-and-display functionality in a single chip, simplifying firmware development with Microchip's MPLAB Code Configurator and reducing time-to-market for touch interface designs.
Recommended
Medical Glucose and Health Meters
The PIC18F65K90T-I/MRRSL fits medical handheld meters such as glucose monitors, pulse oximeters, and blood pressure cuffs where low power consumption, integrated LCD, and reliable touch input are critical. The 12-bit ADC provides accurate analog measurement of electrochemical sensor outputs, while the LCD driver directly interfaces with segmented display glass for clear numeric readouts. nanoWatt XLP technology extends battery life across thousands of measurements per charge, meeting portable medical device usability requirements. The industrial -40C to +85C temperature range supports operation across home, clinical, and field environments. Microchip's validation documentation aids IEC 60730 compliance for Class B medical device firmware per the PIC18F87K90 family datasheet.
Recommended
Industrial Metering and Pump Controllers
The PIC18F65K90T-I/MRRSL supports industrial metering pumps, flow controllers, and process instruments where LCD-based local display and capacitive touch interface improve operator usability. The 53 digital I/O pins allow direct connection to sensor inputs, valve drivers, and communication interfaces such as UART, SPI, and I2C for SCADA or Modbus integration. The 64 MHz clock speed and 16 MIPS throughput provide real-time response for closed-loop control algorithms. Industrial temperature rating to +85C ambient supports deployment in control cabinets and field enclosures. The 64-pin VQFN package with exposed thermal pad enables reliable operation at moderate power levels in DIN-rail mounted equipment per Microchip datasheet thermal specifications.
Recommended
Automotive Accessory and Aftermarket Devices
The PIC18F65K90T-I/MRRSL is well-suited for non-safety automotive aftermarket accessories such as battery monitors, tire pressure display units, garage door openers, and remote starters where LCD visualization is required. While not AEC-Q100 qualified itself, the industrial temperature grade and robust PIC18 architecture support under-dash and cabin-mounted installations. The integrated LCD driver eliminates external display hardware, reducing cost in volume aftermarket products. The CTMU capacitive touch supports sealed button interfaces resistant to moisture and contamination. Designers targeting AEC-Q100 applications should select PIC18F family members with explicit automotive qualification suffixes and review Microchip's automotive product portfolio per family datasheet guidance.
Recommended
Smart Home Sensor Hubs with Local Display
The PIC18F65K90T-I/MRRSL fits smart home sensor hubs and environmental monitors that combine temperature, humidity, and air-quality sensing with a segmented LCD for at-a-glance status display. The 12-bit ADC reads multiple analog sensors directly, while the LCD driver shows real-time values without requiring an always-on host processor. nanoWatt XLP sleep modes allow battery-backed operation across power outages, maintaining display functionality for safety-relevant information such as CO2 levels or filter status. I2C and SPI interfaces connect to digital environmental sensors and wireless modules, supporting integration into broader smart home ecosystems per Microchip PIC18F87K90 family application notes.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F65K90T-I/MRRSL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F65K90T-I/MR | PIC18F65K90-I/MR | PIC18F65K90-E/MR | PIC18F65K80T-I/PT | PIC18F65K40-I/PT |
|---|---|---|---|---|---|---|
| Package | VQFN-64 (9x9 mm) with Exposed Pad | VQFN-64 (9x9 mm) - identical | VQFN-64 (9x9 mm) - identical | VQFN-64 (9x9 mm) - identical | TQFP-64 (different footprint) | TQFP-64 (different footprint) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 32KB (16K x 16) | 32KB (16K x 16) | 32KB (16K x 16) | 32KB (16K x 16) | 32KB equivalent | 32KB |
| Maximum Clock Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| RAM Size | 2KB | 2KB | 2KB | 2KB | 2KB | 2KB |
| EEPROM Size | 1KB | 1KB | 1KB | 1KB | 1KB | 1KB |
| Number of I/O | 53 | 53 | 53 | 53 | 53 | 53 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C |
| Packaging Form | Tape & Reel (RSL suffix) | Tape & Reel (MR suffix) | Tray | Tray | Tape & Reel | Tray |
Key Differentiators
- Reel packaging variant of base PIC18F65K90T-I/MR with identical silicon and footprint (vs PIC18F65K90T-I/MR)
- Extended temperature grade variant available for harsh-environment deployments (vs PIC18F65K90-E/MR)
- Newer-generation K40 family migration path with enhanced peripherals (vs PIC18F65K40-I/PT)
Design Notes
Decouple VDD pins (7, 28, 40, 64) with 100 nF ceramic capacitors placed within 5 mm of each VDD pin, plus a bulk 4.7 uF to 10 uF tantalum or ceramic capacitor on the main supply rail. The PIC18F65K90T-I/MRRSL has four VDD pins distributed across the package; each must be properly decoupled to suppress switching noise during nanoWatt XLP mode transitions. Per Microchip PIC18F87K90 family datasheet, inadequate decoupling can cause POR resets and corrupted EEPROM writes during deep-sleep wake events.
The 64-pin VQFN package features a center exposed thermal pad that MUST be soldered to a PCB land pattern with at least 8 thermal vias to the ground plane for mechanical reliability and thermal dissipation. Missing or insufficient solder joints under the e-pad can cause intermittent connections and lift during thermal cycling. Per IPC-7351 land pattern guidelines, allocate a 5x5 array of 0.3 mm vias on 1.0 mm pitch for optimal thermal performance in surface-mount reflow.
Do not leave unused I/O pins floating; configure them as outputs driving low or enable the internal weak pull-ups via firmware to avoid excessive supply current in sleep modes. Floating LCD segment pins can also cause ghost segments on the display. Per the PIC18F87K90 family datasheet, unused CTMU channels must be disabled to prevent charge accumulation leakage that degrades nanoWatt XLP deep-sleep current below the specified minimum.
Route the LCD segment lines (SEG0 through SEG65) as short as possible and avoid running them parallel to high-frequency switching signals such as PWM outputs or oscillator traces to minimize capacitive coupling and display ghosting. The CTMU touch channels require guard traces or grounded shielding around sensor electrodes for moisture immunity per Microchip application note AN1250. Keep analog ADC traces away from digital switching signals and place a ground pour under the MCU to reduce noise pickup on low-level sensor measurements.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade; not AEC-Q100 qualified - select AEC-Q100 qualified PIC18 variants for automotive safety applications.
