PIC18F65K90T-I/MR - 8-bit PIC MCU, 32KB Flash, LCD Driver | Microchip
MPN: PIC18F65K90T-I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.22 | $3.22 |
| 10 | $2.95 | $29.50 |
| 100 | $2.62 | $262.00 |
| 500 | $2.4 | $1,200.00 |
| 1,000 | $2.18 | $2,180.00 |
| 3,000 | $1.95 | $5,850.00 |
PIC18F65K90T-I/MR Overview
An 8-bit microcontroller (MCU) is a compact programmable processor that combines a CPU, memory, and peripherals on a single silicon die. The PIC18F family from Microchip Technology is built on a RISC architecture with hardware multiplier and Harvard bus structure, optimized for low-power embedded control. Within the broader taxonomy, this places PIC18F65K90T-I/MR as: microcontroller -> 8-bit MCU -> PIC18F family -> nanoWatt XLP series -> LCD-driver integrated MCU -> embedded semiconductor.
Key features include 32KB Flash program memory, 2KB SRAM, 1KB EEPROM, 54 I/O pins, an integrated LCD driver supporting up to 384 segments, and nanoWatt XLP (eXtra Low Power) technology for battery applications. The device also integrates a Charge Time Measurement Unit (CTMU) supporting 24 channels of capacitive touch sensing in 80-pin variants, plus 12-bit ADC, mTouch sensing, and a wide operating temperature range of -40C to +85C.
The PIC18F65K90T-I/MR utilizes Microchip's nanoWatt XLP technology to achieve ultra-low sleep currents (typically under 100 nA), making it well suited to battery-powered applications that must remain dormant for long intervals while waking on interrupt. The integrated LCD driver eliminates the need for an external segment driver IC, reducing BOM cost and PCB area in user-interface designs.
Typical applications include battery-powered metering with LCD displays (electricity/gas/water meters), portable medical monitors, industrial control panels with segment LCDs, automotive dashboards, and capacitive-touch user interfaces. The wide memory and I/O combination also supports home appliances and consumer electronics with simple graphical displays.
When designing with this part, note that the 64-pin QFN EP package requires thermal vias under the exposed pad to dissipate heat and provide mechanical solder joint reliability. The ICD/ICSP programming pins (PGC/PGD) must be routed to accessible test points to enable in-circuit debugging.
This page synthesizes distributor pricing across Mouser/DigiKey/JLCPCB, drop-in alternatives in the same 64-pin QFN EP footprint, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC18F65K90T-I/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 PIC18F65K90T-I/MR (same form factor and footprint) — differing in Package, ADC, Operating Temperature, LCD Driver, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F65K90-I/MR
✅ Drop-In✓ In Stock
$3.02 / Unit
View Datasheet →PIC18F65K90-E/MR
✅ Drop-In✓ In Stock
$4.6 / Unit
View Datasheet →PIC18F65K22-E/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.5 / 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/MR Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC |
| Family | PIC18F |
| Program Memory (Flash) | 32 KB |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Maximum Clock Speed | 40 MHz |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| I/O Pins | 54 |
| LCD Driver | Integrated, up to 384 segments (package-dependent) |
| ADC | 12-bit |
| Capacitive Touch Channels | Up to 24 (via CTMU, family-level) |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 64-pin QFN EP (MR), 9x9 mm |
| Mounting Type | Surface Mount |
| Power Technology | nanoWatt XLP (eXtra Low Power) |
| Charge Time Measurement Unit (CTMU) | Yes |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC18F65K90T-I/MR Pin Configuration
| Pin 1 | RH0/SEG47 — Port H bit 0 / LCD segment 47 |
| Pin 2 | RH1/SEG46 — Port H bit 1 / LCD segment 46 |
| Pin 3 | RH2/SEG45 — Port H bit 2 / LCD segment 45 |
| Pin 4 | RH3/SEG44 — Port H bit 3 / LCD segment 44 |
| Pin 5 | RH4/SEG43 — Port H bit 4 / LCD segment 43 |
| Pin 6 | RH5/SEG42 — Port H bit 5 / LCD segment 42 |
| Pin 7 | RH6/SEG41 — Port H bit 6 / LCD segment 41 |
| Pin 8 | RH7/SEG40 — Port H bit 7 / LCD segment 40 |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply voltage |
| Pin 11 | AVDD — Analog supply voltage |
| Pin 12 | AVSS — Analog ground |
| Pin 13 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Pin 14 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Pin 15 | RA2/AN2/VREF- — Port A bit 2 / Analog input 2 / VREF- |
| Pin 16 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / VREF+ |
| Pin 17 | RA4/AN4 — Port A bit 4 / Analog input 4 |
| Pin 18 | RA5/AN5 — Port A bit 5 / Analog input 5 |
| Pin 19 | RA6/OSC2 — Port A bit 6 / Oscillator output |
| Pin 20 | RA7/OSC1/CLKIN — Port A bit 7 / Oscillator input / Clock in |
| Pin 21 | VSS — Ground reference |
| Pin 22 | VDD — Positive supply voltage |
| Pin 23 | RB0/INT0/FLT0 — Port B bit 0 / External interrupt 0 / PWM fault |
| Pin 24 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| Pin 25 | RB2/INT2 — Port B bit 2 / External interrupt 2 |
| Pin 26 | RB3/INT3 — Port B bit 3 / External interrupt 3 |
| Pin 27 | RB4 — Port B bit 4 |
| Pin 28 | RB5 — Port B bit 5 |
| Pin 29 | RB6/PGC — Port B bit 6 / ICSP clock |
| Pin 30 | RB7/PGD — Port B bit 7 / ICSP data |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage |
| Pin 33 | RC0 — Port C bit 0 |
| Pin 34 | RC1 — Port C bit 1 |
| Pin 35 | RC2 — Port C bit 2 |
| Pin 36 | RC3 — Port C bit 3 |
| Pin 37 | RC4 — Port C bit 4 |
| Pin 38 | RC5 — Port C bit 5 |
| Pin 39 | RC6 — Port C bit 6 |
| Pin 40 | RC7 — Port C bit 7 |
| Pin 41 | VSS — Ground reference |
| Pin 42 | VDD — Positive supply voltage |
| Pin 43 | RD0 — Port D bit 0 |
| Pin 44 | RD1 — Port D bit 1 |
| Pin 45 | RD2 — Port D bit 2 |
| Pin 46 | RD3 — Port D bit 3 |
| Pin 47 | RD4 — Port D bit 4 |
| Pin 48 | RD5 — Port D bit 5 |
| Pin 49 | RD6 — Port D bit 6 |
| Pin 50 | RD7 — Port D bit 7 |
| Pin 51 | VSS — Ground reference |
| Pin 52 | VDD — Positive supply voltage |
| Pin 53 | RE0 — Port E bit 0 |
| Pin 54 | RE1 — Port E bit 1 |
| Pin 55 | RE2 — Port E bit 2 |
| Pin 56 | RE3 — Port E bit 3 |
| Pin 57 | RE4 — Port E bit 4 |
| Pin 58 | RE5 — Port E bit 5 |
| Pin 59 | RE6 — Port E bit 6 |
| Pin 60 | RE7 — Port E bit 7 |
| Pin 61 | VSS — Ground reference |
| Pin 62 | VDD — Positive supply voltage |
| Pin 63 | MCLR/RE3 — Master clear reset / Port E bit 3 alt |
| Pin 64 | EP — Exposed thermal pad (connect to VSS) |
Typical Applications
PIC18F65K90T-I/MR is suitable for 7 applications: Battery-Powered Electricity Meter with LCD, Industrial Control Panel with Segment LCD, Portable Medical Monitor, Capacitive Touch User Interface, Home Appliance with Segment LCD Display, Automotive Dashboard Cluster (Non-Safety), Water/Gas Meter with LCD and Touch Wake.
Battery-Powered Electricity Meter with LCD
The PIC18F65K90T-I/MR fits electricity meter designs because its integrated LCD driver supports up to 384 segments without an external segment driver IC, reducing BOM cost by $0.50-1.00 per meter. With nanoWatt XLP technology delivering sub-100nA sleep current, a 3.6V lithium battery can power the meter for 10+ years in metrology-only sleep mode. The 32KB Flash fits IEC 62056 DLMS/COSEM protocol stacks with room for tariff tables and tamper detection firmware. The CTMU enables capacitive touch buttons replacing mechanical meter buttons, improving sealing and reliability.
Recommended
Industrial Control Panel with Segment LCD
The PIC18F65K90T-I/MR drives industrial HMI panels because its 384-segment LCD driver eliminates separate HT1621-style driver chips, simplifying the BOM. The 12-bit ADC and 54 I/O pins handle multiple sensor inputs (temperature, pressure, flow) plus relay outputs within a single chip. Operating from 4.2V-5.5V with -40C to +85C industrial temperature range, it survives factory floor environments. The PIC18F's 16 MIPS instruction throughput executes PID loops within 1 ms update rates needed for process control.
Recommended
Portable Medical Monitor
The PIC18F65K90T-I/MR serves portable medical devices because its nanoWatt XLP sleep current under 100nA extends battery life on coin-cell or Li-coin power sources. The 32KB Flash fits simple vital-signs algorithms (pulse-oximetry front-end, temperature trending) while leaving room for IEC 62304-compliant firmware. The 12-bit ADC pairs with photodiode front-ends for SpO2 measurement. CTMU capacitive touch enables sealed-button enclosures meeting IP54 ingress requirements without mechanical switches that could harbor pathogens.
Recommended
Capacitive Touch User Interface
The PIC18F65K90T-I/MR supports capacitive touch interfaces because its CTMU module drives up to 24 touch channels on the 64-pin package without external touch controller ICs. The integrated LCD driver simultaneously displays touch feedback on segment displays, enabling single-chip touch + display designs. The mTouch firmware library from Microchip supports buttons, sliders, and proximity sensing with sub-50 ms response, suitable for appliance front panels.
Recommended
Home Appliance with Segment LCD Display
The PIC18F65K90T-I/MR drives home appliances because its integrated segment LCD driver eliminates HT1621-type external drivers, while 54 I/O pins connect to relays, triacs, and keypads for washers, ovens, and HVAC thermostats. The 32KB Flash holds appliance-specific UI state machines plus safety diagnostics. Operating from 5V nominal industrial rails with -40C to +85C temperature range, it tolerates appliance under-cabinet thermal environments without derating.
Recommended
Automotive Dashboard Cluster (Non-Safety)
The PIC18F65K90T-I/MR fits non-safety automotive clusters because its 384-segment LCD driver powers small gauge displays without external drivers, while the 54 I/O pins read switches, drive warning LEDs, and interface LIN bus for body electronics. The -40C to +85C industrial range covers cabin environments; under-hood applications require the automotive-grade variant. The PIC18F's deterministic interrupt latency suits real-time switch debouncing.
Recommended
Water/Gas Meter with LCD and Touch Wake
The PIC18F65K90T-I/MR is ideal for water and gas meters because its nanoWatt XLP technology achieves sub-100nA sleep current while integrated LCD segments display consumption readings without external drivers. CTMU enables capacitive touch wake-up buttons that draw zero current in standby, with the MCU waking on touch and driving the LCD for a few seconds before re-entering sleep. With 32KB Flash, the meter can implement auto-meter-reading protocol stacks (wM-Bus or LoRa WAN MAC).
Recommended
Recommended Products Summary
Engineering reference data for PIC18F65K90T-I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F65K90-I/MR | PIC18F65K90-E/MR | PIC18F65K22-E/MR |
|---|---|---|---|---|
| Package | 64-pin QFN EP (MR) | 64-pin QFN EP (MR) - same | 64-pin QFN EP (MR) - same | 64-pin QFN EP (MR) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 32 KB | 32 KB | 32 KB | 64 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 4 KB |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +125C (Extended) | -40C to +125C (Extended) |
| LCD Driver | Integrated, up to 384 segments | Integrated, 384 segments | Integrated, 384 segments | No integrated LCD |
| CTMU Touch Channels | Up to 24 | Up to 24 | Up to 24 | Up to 16 |
| Supply Voltage | 4.2V to 5.5V | 4.2V to 5.5V | 4.2V to 5.5V | 2.3V to 5.5V |
| Packaging Format | Tape & Reel (T-suffix) | Tray (no T-suffix) | Tray | Tray |
Key Differentiators
- Integrated LCD driver up to 384 segments with no external driver IC (vs PIC18F65K22-E/MR)
- Industrial temperature range -40C to +85C in standard grade (vs PIC18F65K90-E/MR)
- Higher touch channel count via CTMU (vs PIC18F65K22-E/MR)
Design Notes
The 64-pin QFN EP package's exposed thermal pad MUST be soldered to a ground plane with thermal vias (typically 9-16 vias in a 3x3 or 4x4 array) to achieve the rated thermal performance. Estimated: at 40 MHz with all peripherals active and typical 25 mA I/O current, power dissipation is approximately 100-150 mW; without the EP soldered, junction temperature rises 30-40 C/W above ambient, potentially exceeding 85C at high ambient. Per Microchip AN2074 and the PIC18F65K90 family datasheet thermal section, the EP should use 0.2 mm diameter vias with 0.5 mm pitch.
Place decoupling capacitors (100 nF ceramic) on every VDD/AVDD pin within 3 mm of the pin, plus a bulk 10 uF tantalum or ceramic at the supply input. The PIC18F65K90 has multiple VDD/VSS pairs (pins 10/9, 22/21, 32/31, 42/41, 52/51, 62/61); each pair requires its own 100 nF decoupling. A single bulk cap is insufficient. The 32 kHz crystal or resonator on OSC1/OSC2 should be placed within 5 mm with short traces and a grounded guard ring.
Route the ICSP programming pins PGC (RB6) and PGD (RB7) directly to a 2x5 header or test pad array with no series components; Microchip ICD programmers require direct access. The MCLR pin needs a 10 kohm pull-up to VDD plus a 100 nF cap to ground for proper reset; if using in-circuit serial programming, isolate MCLR from external reset circuitry. Keep analog traces (AN0-AN12) short and away from digital switching traces to minimize ADC noise.
Common pitfalls: (1) Configuring a pin as analog when its digital input is also enabled causes 1-2 mA shoot-through current - always clear the corresponding ANSEL bit for digital pins. (2) The LCD segment pins are multiplexed with port H; configuring port H as output while LCD is active results in display ghosting. (3) Forgetting to disable peripherals before sleep mode can prevent nanoWatt XLP from achieving sub-uA current - explicitly disable ADC, comparators, and unused peripherals in firmware before WFI or sleep instructions.
The 12-bit ADC achieves 60+ dB SNR only with proper analog ground isolation. Estimated: separate the AGND and DGND planes with a single-point connection under the AVDD pin; route analog traces over the AGND plane and digital traces over the DGND plane. Place a ferrite bead or small resistor between AVDD and VDD to isolate ADC switching noise. Reference Microchip AN1251 for ADC layout best practices on the PIC18F65K90 family.
Compliance Information
RoHS and REACH compliant per Microchip product declaration. Not AEC-Q100 qualified - for automotive applications, choose PIC18F65K90T-I/MRRSL or PIC18F65K90-E/MR with automotive-grade screening. Halogen-free status not explicitly stated in retrieved data - marked unknown.
