PIC18F65K90-E/PT - 32KB Flash LCD MCU 64-Pin TQFP | Microchip
MPN: PIC18F65K90-E/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.2 | $7.20 |
| 10 | $6.48 | $64.80 |
| 100 | $5.76 | $576.00 |
| 500 | $5.15 | $2,575.00 |
| 1,000 | $4.61 | $4,610.00 |
PIC18F65K90-E/PT Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path; the PIC18 line is Microchip's high-performance 8-bit family using a modified Harvard RISC architecture with a 16-bit instruction word. Within the power-management hierarchy, an MCU belongs to the broader category of embedded processors, alongside 16-bit MCUs, 32-bit MCUs, and DSPs; within Microchip's portfolio it sits below the PIC24/dsPIC33 (16-bit) and PIC32 (32-bit) families.
Key features of the PIC18F65K90-E/PT include 54 I/O pins, nanoWatt XLP extreme-low-power technology (deep sleep currents in the nA range), a Charge Time Measurement Unit (CTMU) for capacitive touch sensing, and up to 24 channels of capacitive touch support. The integrated LCD driver supports up to 192 segments, making it a single-chip solution for human-machine interface (HMI) panels. Peripheral options include multiple USART, SPI, I2C, 12-bit ADC with computation, and multiple PWM/capture/compare modules.
Architecturally, the part uses Microchip's enhanced PIC18 core with hardware multiplier, 31-level hardware stack, and configurable oscillator modes (internal 31 kHz LF, 8 % tolerance, plus HF PLL up to 64 MHz). The K-series silicon adds XLP power-saving peripherals such as RTCC, ultra-low-power wake, and deep-sleep retention of RAM.
Typical applications include battery-powered LCD meters, thermostats, white-goods control boards, industrial HMI keypads, and capacitive-touch user interfaces where a single MCU drives both the display and the touch matrix. The CTMU peripheral allows up to 24 touch buttons without external analog components.
When designing with this MCU, budget sufficient board area for the LCD bias resistors and segment capacitors; missing charge-pump capacitors is the most common cause of contrast failure. Also confirm your compiler tools (XC8) are at the latest version to ensure correct CTMU peripheral drivers.
This page synthesizes distributor pricing, same-family drop-in alternatives in the same 64-pin TQFP, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for PIC18F65K90-E/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 PIC18F65K90-E/PT (same form factor and footprint) — differing in Package, ADC, Core Architecture, Operating Temperature, Operating Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F65K90-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F65K90-E/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.6 / Unit
View Datasheet →PIC18F66K90-E/PT
✅ Drop-In✓ In Stock
$4.4 / Unit
View Datasheet →PIC18F67K90-E/PT
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →PIC18F87K90-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F65K80T-I/PT
✅ Drop-In✓ In Stock
$3.33 / Unit
View Datasheet →PIC18F65K90-E/PT Maximum Ratings & Electrical Characteristics
| Family | PIC18F87K90 |
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Program Memory (Flash) | 32 KB |
| RAM | 2 KB |
| Maximum CPU Speed | 64 MHz (16 MIPS) |
| Operating Voltage | 1.8 V to 5.5 V |
| I/O Pins | 54 |
| ADC | 12-bit, up to 16 channels |
| LCD Segments | Up to 192 segments |
| Touch Channels (CTMU) | Up to 24 |
| Package | TQFP-64 (10 x 10 x 1 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 °C to +125 °C (Extended, "E") |
| RoHS Status | Compliant |
PIC18F65K90-E/PT Pin Configuration
| Pin 1 | RC0 — Digital I/O / CTMU channel |
| Pin 2 | RC1 — Digital I/O / CTMU channel |
| Pin 3 | RC2 — Digital I/O / CTMU channel |
| Pin 4 | RC3 — Digital I/O / SCL |
| Pin 5 | RC4 — Digital I/O / SDA |
| Pin 6 | RC5 — Digital I/O / SDO |
| Pin 7 | RC6 — Digital I/O / TX1 |
| Pin 8 | RC7 — Digital I/O / RX1 |
| Pin 9 | SEG0 — LCD segment driver 0 |
| Pin 10 | SEG1 — LCD segment driver 1 |
| Pin 11 | SEG2 — LCD segment driver 2 |
| Pin 12 | SEG3 — LCD segment driver 3 |
| Pin 13 | SEG4 — LCD segment driver 4 |
| Pin 14 | SEG5 — LCD segment driver 5 |
| Pin 15 | SEG6 — LCD segment driver 6 |
| Pin 16 | SEG7 — LCD segment driver 7 |
| Pin 17 | VLCD1 — LCD charge pump output 1 |
| Pin 18 | VLCD2 — LCD charge pump output 2 |
| Pin 19 | VLCD3 — LCD charge pump output 3 |
| Pin 20 | VDD — Positive supply |
| Pin 21 | VSS — Ground |
| Pin 22 | RB0 — Digital I/O / INT0 |
| Pin 23 | RB1 — Digital I/O / INT1 |
| Pin 24 | RB2 — Digital I/O / INT2 |
| Pin 25 | RB3 — Digital I/O / INT3 |
| Pin 26 | RB4 — Digital I/O / KBI0 |
| Pin 27 | RB5 — Digital I/O / KBI1 |
| Pin 28 | RB6 — Digital I/O / KBI2 / PGC |
| Pin 29 | RB7 — Digital I/O / KBI3 / PGD |
| Pin 30 | RD0 — Digital I/O / PSP0 |
| Pin 31 | RD1 — Digital I/O / PSP1 |
| Pin 32 | RD2 — Digital I/O / PSP2 |
| Pin 33 | RD3 — Digital I/O / PSP3 |
| Pin 34 | RD4 — Digital I/O / PSP4 |
| Pin 35 | RD5 — Digital I/O / PSP5 |
| Pin 36 | RD6 — Digital I/O / PSP6 |
| Pin 37 | RD7 — Digital I/O / PSP7 |
| Pin 38 | RE0 — Digital I/O / AN5 |
| Pin 39 | RE1 — Digital I/O / AN6 |
| Pin 40 | RE2 — Digital I/O / AN7 |
| Pin 41 | RE3 — Digital I/O |
| Pin 42 | RA0 — Digital I/O / AN0 |
| Pin 43 | RA1 — Digital I/O / AN1 |
| Pin 44 | RA2 — Digital I/O / AN2 |
| Pin 45 | RA3 — Digital I/O / AN3 |
| Pin 46 | RA4 — Digital I/O / T0CKI |
| Pin 47 | RA5 — Digital I/O / AN4 |
| Pin 48 | RA6 — Digital I/O / OSC2 |
| Pin 49 | RA7 — Digital I/O / OSC1 |
| Pin 50 | VSS — Ground |
| Pin 51 | VDD — Positive supply |
| Pin 52 | COM0 — LCD common driver 0 |
| Pin 53 | COM1 — LCD common driver 1 |
| Pin 54 | COM2 — LCD common driver 2 |
| Pin 55 | COM3 — LCD common driver 3 |
| Pin 56 | SEG8 — LCD segment driver 8 |
| Pin 57 | SEG9 — LCD segment driver 9 |
| Pin 58 | SEG10 — LCD segment driver 10 |
| Pin 59 | SEG11 — LCD segment driver 11 |
| Pin 60 | SEG12 — LCD segment driver 12 |
| Pin 61 | SEG13 — LCD segment driver 13 |
| Pin 62 | SEG14 — LCD segment driver 14 |
| Pin 63 | SEG15 — LCD segment driver 15 |
| Pin 64 | MCLR — Reset (active low) |
Typical Applications
PIC18F65K90-E/PT is suitable for 6 applications: Battery-Powered LCD Meter, Thermostat with Capacitive Touch HMI, White-Goods Control Board, Industrial HMI Keypad Module, Medical Infusion Pump User Interface, Solar-Powered IoT Sensor Node with Display.
Battery-Powered LCD Meter
The PIC18F65K90-E/PT fits battery-powered LCD meters thanks to its nanoWatt XLP deep-sleep current in the nA range, integrated LCD driver for up to 192 segments, and 1.8 V to 5.5 V operation that lets the same PCB run from two alkaline cells, a CR2032 coin cell, or a single lithium primary. Place the MCU between the battery stack and the LCD glass; the charge pump generates V LCD from V DD directly, removing the need for an external negative bias. Compared to a discrete LCD driver plus external MCU solution, the K90 collapses BOM by 1 IC and 4 to 6 passives, and the -E temperature grade (-40 °C to +125 °C) supports outdoor metering.
Recommended
Thermostat with Capacitive Touch HMI
The PIC18F65K90-E/PT is ideal for wall-mounted thermostats because the CTMU module drives up to 24 capacitive touch buttons with no external analog IC, and the integrated LCD driver handles the segmented display plus backlight control on the same die. Place 24 touch electrodes under the front panel and route them to the CTMU channels; the firmware uses the ADC to measure charge time and debounce. Unlike mechanical-button thermostats, capacitive touch eliminates gasket wear and gives a fully sealed front face for IP54 indoor enclosures.
Recommended
White-Goods Control Board
The PIC18F65K90-E/PT serves washing-machine, dishwasher, and oven control boards where a single MCU must drive a 7-segment or dot-matrix LCD, scan a capacitive touch keypad, and run the motor/relay logic simultaneously. Fit the K90's 54 I/O pins: 24 for touch, 8 for LCD backlight PWM, 12 for relay/triac drivers, and 10 for motor encoder / UART diagnostics. The 64 MHz (16 MIPS) core sustains real-time control loops at 1 kHz while servicing the LCD refresh and CTMU scans. AEC-Q100 screening is not claimed but the -E grade extends to +125 °C, sufficing for behind-panel thermal exposure.
Recommended
Industrial HMI Keypad Module
The PIC18F65K90-E/PT works well in industrial HMI keypad modules that communicate to a host PLC or controller via RS-485, CAN, or UART. Use the K90's USART plus the CTMU to scan a 4x6 metal-touch keypad, then forward key states over the serial link; the LCD driver simultaneously displays menu labels on a 96- or 128-segment glass. The extended -40 °C to +125 °C temperature grade handles factory-floor cold starts and cabinet heat soak, while the K-series nanoWatt XLP standby lets the module idle below 100 nA for battery-backed tag displays.
Recommended
Medical Infusion Pump User Interface
The PIC18F65K90-E/PT supports medical infusion-pump user interfaces where a single MCU drives the display, touch keypad, alarm buzzer, and non-critical housekeeping while a separate dedicated safety MCU handles the fluidics. Fit the K90's LCD driver for the segmented status display, CTMU for the silicone-keypad replacement, and PWM for the buzzer tone. Per IEC 60601 the K90 should be confined to the HMI partition and isolated from life-critical functions; the -E grade's +125 °C ceiling is appropriate for the control-board thermal environment inside an enclosure.
Recommended
Solar-Powered IoT Sensor Node with Display
The PIC18F65K90-E/PT fits solar-powered IoT sensor nodes with a local segmented LCD readout, because the nanoWatt XLP sleep modes drop quiescent current to single-digit nA while retaining RAM, and the LCD driver remains active in deep sleep to keep the last measured value visible. Wake on RTCC, sample the sensor, update the LCD, transmit via UART/Wi-Fi module, then return to sleep. Solar energy budgets of 1 to 2 mAh per day are sufficient for periodic measurements every few minutes, leveraging the K90's ultra-low-power wake, ADC, and LCD refresh without external components.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F65K90-E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F65K90-I/PT | PIC18F66K90-E/PT | PIC18F67K90-E/PT | PIC18F87K90-E/PT | PIC18F65K80T-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (10x10 mm) | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same |
| Flash Program Memory | 32 KB | 32 KB | 64 KB | 128 KB | 128 KB | 32 KB |
| RAM | 2 KB | 2 KB | 4 KB | 4 KB | 4 KB | 2 KB |
| LCD Driver | Yes (up to 192 segments) | Yes (up to 192 segments) | Yes (up to 192 segments) | Yes (up to 192 segments) | Yes (up to 192 segments) | No |
| CTMU Touch Channels | Up to 24 | Up to 24 | Up to 24 | Up to 24 | Up to 24 | 0 |
| Maximum CPU Speed | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) |
| Operating Temperature | -40 °C to +125 °C (Extended) | -40 °C to +85 °C (Industrial) | -40 °C to +125 °C (Extended) | -40 °C to +125 °C (Extended) | -40 °C to +125 °C (Extended) | -40 °C to +85 °C (Industrial) |
| 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 |
Key Differentiators
- Extended -40 °C to +125 °C temperature range vs industrial -85 °C ceiling (vs PIC18F65K90-I/PT)
- Integrated LCD driver and CTMU peripherals in the same package (vs PIC18F65K80T-I/PT)
- 32 KB Flash matches this part exactly; 66K90 / 67K90 / 87K90 drop-ins add memory (vs PIC18F66K90-E/PT)
Design Notes
Place the VLCD1, VLCD2, and VLCD3 charge-pump capacitors as close to the MCU pins as possible using short traces to a quiet ground. A 1 µF X7R ceramic on each VLCD pin and a 100 nF bulk on VDD adjacent to the IC are the minimum recommended values per the datasheet. Without these capacitors the LCD will show uneven contrast or fail to bias the segment commons correctly.
For battery operation below 2 V, enable the nanoWatt XLP deep-sleep mode and use the RTCC (real-time clock calendar) alarm to wake the MCU periodically. According to the datasheet, deep-sleep current is below 100 nA typical with RAM retention; combined with the LCD segment driver staying active in sleep, this enables coin-cell operation for years. Be sure to disable all unused modules in the OSCCON, PMD, and FVRCON registers before entering sleep to minimize current draw.
CTMU capacitive touch sensing is sensitive to PCB trace capacitance and ground loops. Route touch electrodes as short, narrow traces with the touch pad area at least 8 mm² and a uniform ground flood at least 10 mm away. Avoid running digital signals parallel to or beneath touch traces; cross at right angles if necessary. A grounded guard ring around each electrode improves noise immunity in industrial environments.
Do not use the PIC18F67J11-I/PT as a transparent substitute for the PIC18F65K90-E/PT - although both are 64-pin TQFP PIC18 parts, the J11 uses a different oscillator module, programming interface, and LCD driver register map. Firmware compiled for K90 will not run on J11 without porting; the K90 family and the J11 family have different peripheral libraries in MPLAB XC8. Always cross-check the peripheral compatibility matrix in the Microchip selector guide before substituting across families.
Compliance Information
RoHS and REACH compliant per Microchip product page. The -E temperature grade (-40 °C to +125 °C) is NOT the same as AEC-Q100 automotive qualification; for AEC-Q100 screened parts, look for parts in the PIC18F87K90 automotive catalog. Lead-free and halogen-free per Microchip environmental compliance documentation.
