PIC18F65K90T-I/PT - 8-Bit 64MHz 32KB Flash XLP MCU | Microchip
MPN: PIC18F65K90T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.89 | $48.90 |
| 100 | $4.36 | $436.00 |
| 500 | $3.93 | $1,965.00 |
| 1,000 | $3.54 | $3,540.00 |
| 3,000 | $3.1 | $9,300.00 |
PIC18F65K90T-I/PT Overview
A microcontroller (MCU) is a single-chip computer containing a CPU, memory (Flash, RAM, EEPROM), and programmable peripherals. The PIC18F65K90 sits within the 8-bit PIC microcontrollers -> PIC18 family -> Microchip MCU -> microcontroller -> embedded processor hierarchy. The 'K' series in PIC18 nomenclature indicates nanoWatt XLP technology targeting ultra-low-power operation, while the '90' suffix denotes LCD-driver integration and CTMU (Charge Time Measurement Unit) support, making the part a natural fit for human-machine-interface products.
Key features include up to 54 digital I/O pins, an integrated LCD driver (up to 96 segments depending on the variant), an on-chip 12-bit ADC, multiple communication peripherals (UART, SPI, I2C), and nanoWatt XLP sleep currents in the sub-microamp range. The 32KB of self-programmable Flash enables in-application firmware updates, while the 2KB RAM supports modest data buffering without external memory. The wide 1.8V-5.5V operating range lets the same design run from a single-cell Li-ion pack or from a regulated 5V rail.
Typical applications span battery-powered LCD panels, e-metering, white goods with segment displays, capacitive-touch user interfaces (via CTMU), portable medical monitors, and industrial control with local HMI. The CTMU module enables 24 channels of capacitive touch sensing on the larger 80-pin family members, eliminating dedicated touch controllers and reducing BOM cost.
When designing with the PIC18F65K90T-I/PT, choose the '-I' industrial temperature grade for commercial and industrial products; upgrade to '-E' (extended, -40C to +125C) only for harsh-environment designs. Verify that your chosen package pin count (64-pin TQFP here) supports all required I/O, LCD segments, and analog channels for your board revision.
Drop-in alternatives for PIC18F65K90T-I/PT — 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/PT (same form factor and footprint) — differing in Package, ADC, LCD Driver, Operating Temperature, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F65K90T-I/MRRSL
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →PIC18F65K90T-I/MR
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →PIC18F65K90-I/MR
✅ Drop-In✓ In Stock
$3.02 / Unit
View Datasheet →PIC18F65K90-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F65K80T-I/PT
✅ Drop-In✓ In Stock
$3.33 / Unit
View Datasheet →PIC18F65K40-I/PT
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →PIC18F65K90T-I/PT Maximum Ratings & Electrical Characteristics
| Architecture | 8-bit PIC18 RISC |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM | 2 KB |
| Data EEPROM | 1 KB |
| Maximum CPU Speed | 64 MHz |
| Operating Voltage | 1.8 V to 5.5 V |
| I/O Pins | 54 |
| ADC | 12-bit |
| LCD Driver | Integrated segment LCD controller |
| Package | TQFP-64 (PT), 10 x 10 mm |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial, 'I') |
| RoHS Status | Compliant |
| MSL Level | 3 (168 hours) |
| Program Memory Type | Flash (self-programmable) |
PIC18F65K90T-I/PT Pin Configuration
| Pin 1 | MCLR/RE3 — Master Clear (reset) input or digital-only RE3 input |
| Pin 2 | RA0 — PORTA bit 0 / analog AN0 |
| Pin 3 | RA1 — PORTA bit 1 / analog AN1 |
| Pin 4 | RA2 — PORTA bit 2 / analog AN2 |
| Pin 5 | RA3 — PORTA bit 3 / analog AN3 |
| Pin 6 | RA4 — PORTA bit 4 / analog AN4 |
| Pin 7 | RA5 — PORTA bit 5 / analog AN5 |
| Pin 8 | RA6 — PORTA bit 6 / analog AN6 |
| Pin 9 | RA7 — PORTA bit 7 / analog AN7 |
| Pin 10 | VSS — Ground reference |
| Pin 11 | VDD — Positive supply for I/O and logic |
| Pin 12 | RB0 — PORTB bit 0 / INT0 |
| Pin 13 | RB1 — PORTB bit 1 / INT1 |
| Pin 14 | RB2 — PORTB bit 2 / INT2 |
| Pin 15 | RB3 — PORTB bit 3 / INT3 |
| Pin 16 | RB4 — PORTB bit 4 |
| Pin 17 | RB5 — PORTB bit 5 |
| Pin 18 | RB6 — PORTB bit 6 / ICD PGC |
| Pin 19 | RB7 — PORTB bit 7 / ICD PGD |
| Pin 20 | VSS — Ground reference |
| Pin 21 | VDDCORE — Core logic regulator output (cap to VSS) |
| Pin 22 | RC0 — PORTC bit 0 |
| Pin 23 | RC1 — PORTC bit 1 |
| Pin 24 | RC2 — PORTC bit 2 |
| Pin 25 | RC3 — PORTC bit 3 / SCL1 |
| Pin 26 | RC4 — PORTC bit 4 / SDA1 |
| Pin 27 | RC5 — PORTC bit 5 |
| Pin 28 | RC6 — PORTC bit 6 / TX1 |
| Pin 29 | RC7 — PORTC bit 7 / RX1 |
| Pin 30 | VSS — Ground reference |
| Pin 31 | VDD — Positive supply for I/O |
| Pin 32 | RD0 — PORTD bit 0 |
| Pin 33 | RD1 — PORTD bit 1 |
| Pin 34 | RD2 — PORTD bit 2 |
| Pin 35 | RD3 — PORTD bit 3 |
| Pin 36 | RD4 — PORTD bit 4 |
| Pin 37 | RD5 — PORTD bit 5 |
| Pin 38 | RD6 — PORTD bit 6 |
| Pin 39 | RD7 — PORTD bit 7 |
| Pin 40 | VSS — Ground reference |
| Pin 41 | VDD — Positive supply for I/O |
| Pin 42 | RE0 — PORTE bit 0 |
| Pin 43 | RE1 — PORTE bit 1 |
| Pin 44 | RE2 — PORTE bit 2 |
| Pin 45 | RF0 — PORTF bit 0 / LCD segment |
| Pin 46 | RF1 — PORTF bit 1 / LCD segment |
| Pin 47 | RF2 — PORTF bit 2 / LCD segment |
| Pin 48 | RF3 — PORTF bit 3 / LCD segment |
| Pin 49 | RF4 — PORTF bit 4 / LCD segment |
| Pin 50 | RF5 — PORTF bit 5 / LCD segment |
| Pin 51 | RF6 — PORTF bit 6 / LCD segment |
| Pin 52 | RF7 — PORTF bit 7 / LCD segment |
| Pin 53 | RG0 — PORTG bit 0 / LCD segment |
| Pin 54 | RG1 — PORTG bit 1 / LCD segment |
| Pin 55 | RG2 — PORTG bit 2 / LCD segment |
| Pin 56 | RG3 — PORTG bit 3 / LCD segment |
| Pin 57 | RG4 — PORTG bit 4 / LCD segment |
| Pin 58 | OSC1/CLKI/RA7 — External crystal input or clock input (alternate RA7) |
| Pin 59 | OSC2/CLKO/RA6 — External crystal output or clock output (alternate RA6) |
| Pin 60 | VSS — Ground reference |
| Pin 61 | VDD — Positive supply for I/O |
| Pin 62 | LCDBIAS0 — LCD bias voltage node 0 (cap to VSS) |
| Pin 63 | LCDBIAS1 — LCD bias voltage node 1 (cap to VSS) |
| Pin 64 | LCDBIAS2 — LCD bias voltage node 2 (cap to VSS) |
Typical Applications
PIC18F65K90T-I/PT is suitable for 6 applications: Battery-Powered LCD Panel, Capacitive-Touch User Interface, Electronic Metering and Smart Energy, Industrial Control with Local HMI, White Goods with Segment Displays, Portable Medical Monitor.
Battery-Powered LCD Panel
The PIC18F65K90T-I/PT is the central MCU in battery-powered segment-LCD panels. Its nanoWatt XLP technology delivers sub-microamp sleep current while the integrated segment LCD driver controls up to 96 segments without an external bias generator. With 32 KB of Flash it fits typical UI state machines; 2 KB RAM supports menu buffering. The 1.8V-5.5V supply range lets the same board run from two AA cells or a regulated 3.3V rail, with the 64 MHz internal oscillator providing fast LCD refresh for flicker-free displays in metering or portable instrumentation.
Recommended
Capacitive-Touch User Interface
The PIC18F65K90T-I/PT drives capacitive-touch user interfaces using its on-chip Charge Time Measurement Unit (CTMU) and mTouch peripheral library. The CTMU measures capacitance changes from finger touches on PCB pads, supporting up to 24 channels on the larger family members. The 64 MHz CPU handles scanning and debounce algorithms in real time, while the 32 KB Flash accommodates full-featured touch + LCD firmware. Active-touch current stays below 1 mA, and idle sleep current under 1 uA, enabling battery-powered remote controls, smart switches, and appliance panels.
Recommended
Electronic Metering and Smart Energy
The PIC18F65K90T-I/PT suits single-phase electronic meters that require a local segment LCD, low sleep current, and reliable EEPROM data logging. The 1 KB data EEPROM stores tariff tables and tamper counters; the integrated 12-bit ADC samples current shunts at 64 MHz CPU bandwidth. The MCU's wide 1.8V-5.5V range accepts direct battery backup, and the CTMU detects meter-tampering events such as cover removal. XLP sleep current of less than 100 nA on the K90 family lets meters survive several years on a single coin cell.
Recommended
Industrial Control with Local HMI
The PIC18F65K90T-I/PT powers industrial control boards with local HMI segment displays and capacitive buttons, replacing discrete HMI ICs. The 54 GPIO pins drive relays, optocouplers, and sensor interfaces, while the integrated segment LCD reports setpoints and alarms. UART, SPI, and I2C peripherals connect to Modbus transceivers and external sensors. The industrial -40C to +85C rating matches IEC 60068-2 operating environments, and the 64 MHz instruction throughput closes PID loops at sub-millisecond rates for HVAC and motor-control subsystems.
Recommended
White Goods with Segment Displays
The PIC18F65K90T-I/PT is well suited to washing machines, dishwashers, and ovens where a segment LCD or VFD must be driven alongside touch controls and rotary encoders. The 32 KB Flash fits feature-rich UI code; the CTMU supports capacitive touch keys on the front panel; the integrated segment LCD eliminates a dedicated driver IC. XLP technology keeps standby power below 1 W per IEC 62301, helping products meet Energy Star and EU Ecodesign 2026 standby regulations for white goods.
Recommended
Portable Medical Monitor
The PIC18F65K90T-I/PT serves portable medical monitors such as pulse oximeters, blood-pressure cuffs, and glucose meters where low-power segment LCD readout is essential. The 12-bit ADC reads sensor front-ends; the integrated LCD driver displays readings; and XLP sleep mode under 100 nA extends battery life between charges. The 32 KB Flash is sufficient for firmware implementing measurement algorithms, while the 1 KB EEPROM logs the last 200 readings. The -40C to +85C industrial grade supports home and clinical environments.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F65K90T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F65K90T-I/MRRSL | PIC18F65K90T-I/MR | PIC18F65K90-I/MR | PIC18F65K90-I/PT | PIC18F65K80T-I/PT | PIC18F65K40-I/PT |
|---|---|---|---|---|---|---|---|
| Package | TQFP-64 (PT) 10x10 mm | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB (K80 series) | 32 KB (K40 series) |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Data EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Max CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| I/O Pins | 54 | 54 | 54 | 54 | 54 | 54 | 54 |
| LCD Driver | Yes (segment LCD + CTMU) | Yes (same) | Yes (same) | Yes (same) | Yes (same) | Limited (no CTMU) | No |
| Approx Unit Price (qty 100) | 4.36 USD | ~4.36 USD | ~4.36 USD | ~4.36 USD | ~4.50 USD | ~3.95 USD | ~3.65 USD |
Key Differentiators
- Integrated LCD segment driver with CTMU for capacitive touch (vs PIC18F65K40-I/PT)
- Same TQFP-64 footprint as K40/K80 series for design reuse (vs PIC18F65K22-I/PT)
- 32 KB Flash and 2 KB RAM in TQFP-64 (vs PIC18F65J10-I/PT)
Design Notes
The PIC18F65K90T-I/PT operates from 1.8 V to 5.5 V, but the integrated 1.8 V core regulator must see a bulk capacitor on VDDCORE (pin 21). Decouple VDD/VSS pairs at every VDD pin (11, 31, 41, 61) with a 100 nF ceramic plus a 4.7 uF bulk at the regulator input. For battery applications, switch to the lowest-voltage sleep mode (Retention Sleep, <100 nA) and gate any always-on analog blocks to preserve coin-cell life.
The 64-pin TQFP (PT) is a 0.5 mm-pitch SMD package requiring fine-pitch PCB layout. Use 0.25 mm trace width / 0.15 mm space with 0.2 mm via-in-pad if possible; place a continuous ground pour under the device to drop thermal impedance to about 40 C/W. Mount MCLR (pin 1) with a 10 kohm pull-up to VDD and a 100 nF cap to ground for clean reset, and keep MCLR trace short to avoid EMI coupling.
The PIC18F65K90T-I/PT LCD bias pins (62-64) need three external capacitors (typically 100 nF to 1 uF ceramic, low-leakage) to generate the LCD contrast voltages; omitting them causes ghost segments and weak contrast. CTMU-based capacitive touch pins must be configured as analog, not digital, and require calibration cycles every power-up to track humidity/temperature drift. Finally, do not exceed 64 MHz fOSC without configuring the PLL correctly - the internal 16 MHz HFINTOSC needs the 4x PLL enabled before fOSC exceeds 32 MHz.
Compliance Information
RoHS and REACH compliant per Microchip product page. The standard 'I' (industrial) grade is not AEC-Q100 qualified; for automotive applications contact Microchip for PIC18F66K90T automotive variants.
