PIC18LF8490T-I/PT - 16KB Flash LCD MCU 40MHz TQFP-80 | Microchip
MPN: PIC18LF8490T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.42 | $9.42 |
| 10 | $8.91 | $89.10 |
| 100 | $8.05 | $805.00 |
| 500 | $7.34 | $3,670.00 |
| 1,000 | $6.78 | $6,780.00 |
PIC18LF8490T-I/PT Overview
What is a PIC microcontroller? A PIC (Peripheral Interface Controller) is a family of Harvard-architecture 8-bit RISC microcontrollers from Microchip Technology built around a small instruction set, deterministic interrupt response, and on-chip peripherals such as ADC, timers, and communication engines. Within the PIC taxonomy, the LF prefix denotes the low-voltage / low-power (F) variant; PIC18LF8490 belongs to the upper-tier PIC18 family, which adds 16-bit instructions, linear addressing of up to 2 MB, C-friendly architecture, and hardware multipliers.
Key features of the PIC18LF8490T-I/PT include a wide 2.0 V to 5.5 V operating range, an integrated LCD driver with up to 192 segments, four 8-bit timers, two capture/compare/PWM modules, two USART ports, one SPI and one I2C bus, an on-chip 10-bit ADC with 12 input channels, nanoWatt power management with multiple idle and sleep modes, and self-programmability for in-field firmware upgrades.
The device uses Microchip's enhanced flash cell and a 16-bit instruction word with an 8-bit data path, achieving 200 ns instruction execution at 40 MHz. The integrated LCD driver supports static, 1/2, 1/3, and 1/4 duty multiplexed panels with software-controllable bias, removing the need for an external LCD controller in user-interface designs.
Typical applications include battery-powered metering with LCD readouts, portable medical instruments, industrial control panels with segmented displays, automotive instrument clusters, home appliance user interfaces, and remote sensor terminals. The combination of LCD integration and low-power nanoWatt modes makes the part particularly suitable for mains- or battery-powered HMI products.
When designing with this device, allocate sufficient I/O for both the LCD segment lines and digital peripherals, and observe Microchip's recommended decoupling (0.1 microfarad plus bulk) close to the supply pins. Programming is supported through ICSP, requiring dedicated PGC and PGD pins reserved in the PCB layout.
This page consolidates distributor pricing, same-package drop-in alternatives from the PIC18LF family, and practical design notes that complement the manufacturer datasheet.
Drop-in alternatives for PIC18LF8490T-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 PIC18LF8490T-I/PT (same form factor and footprint) — differing in Package, Operating Temperature, ADC, Maximum CPU Speed, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF8490-I/PT
✅ Drop-In✓ In Stock
$5.18 / Unit
View Datasheet →PIC18F8490T-I/PT
✅ Drop-In✓ In Stock
$6.05 / Unit
View Datasheet →PIC18F8490-I/PT
✅ Drop-In✓ In Stock
$5.55 / Unit
View Datasheet →PIC18LF8393-I/PT
✅ Drop-In✓ In Stock
$4.96 / Unit
View Datasheet →PIC18LF8390-I/PT
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →PIC18LF8490T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 8-bit RISC (Harvard) |
| Program Memory | 16 KB (8K x 16) Flash |
| Data Memory (SRAM) | 768 bytes |
| Maximum CPU Speed | 40 MHz (16 MIPS) |
| Instruction Cycle | 200 ns at 40 MHz |
| Operating Voltage Range | 2.0 V to 5.5 V |
| I/O Pins | 66 (package-limited; 54 on smaller variants) |
| ADC | 10-bit, 12 channels |
| Timers | 4 x 8/16-bit |
| CCP Modules | 2 |
| USART | 2 |
| SPI | 1 |
| I2C | 1 (MSSP) |
| LCD Driver | Integrated, up to 192 segments |
| Power-Saving Modes | nanoWatt (Sleep, Idle, RC_RUN, etc.) |
| Package | TQFP-80 (PT), 12x12 mm, 0.5 mm pitch |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Lead-Free / RoHS | Yes / Compliant |
| Programming | ICSP (In-Circuit Serial Programming) |
PIC18LF8490T-I/PT tqfp-80 (pt), 12x12 mm, 0.5 mm pitch Pin Configuration Guide
Pin configuration for PIC18LF8490T-I/PT (tqfp-80 (pt), 12x12 mm, 0.5 mm pitch package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC18LF8490T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC18LF8490T-I/PT is suitable for 6 applications: Battery-Powered Metering with LCD Readout, Industrial Control Panel with Segmented Display, Portable Medical Monitoring Device, Home Appliance User Interface, Automotive Instrument Cluster Auxiliary Display, Remote Sensor Terminal with LCD Status.
Battery-Powered Metering with LCD Readout
The PIC18LF8490T-I/PT is well suited to battery-powered metering because its integrated 192-segment LCD driver removes the need for an external controller, and nanoWatt Technology enables nanoampere-level sleep current for multi-year battery life. The 2.0 V to 5.5 V supply window accepts 2 x AA alkaline or Li coin cells directly, while the 12-channel 10-bit ADC digitises sensor inputs (temperature, flow, voltage) without an external analogue front end. The 16 MIPS core easily handles BCD conversion, tariff logic, and segmented display updates at a 40 MHz clock.
Recommended
Industrial Control Panel with Segmented Display
For industrial HMI panels, the PIC18LF8490T-I/PT drives up to 192 LCD segments directly, replacing an external LCD controller and reducing BOM cost. The four timers and two CCP modules handle PWM-controlled backlights, buzzer tones, and keypad scanning, while two USART ports connect to RS-485 or RS-232 transceivers for Modbus RTU communication. The 10-bit ADC reads potentiometers and 4-20 mA loop inputs through a simple resistive divider, making the part a single-chip solution for machine status panels.
Recommended
Portable Medical Monitoring Device
Portable medical instruments benefit from the PIC18LF8490T-I/PT's combination of low-power operation, integrated LCD, and 12-bit-class ADC precision. Heart-rate, SpO2, or glucose meter designs use the ADC with external op-amp front ends, drive the result on the integrated segmented LCD, and rely on nanoWatt sleep modes to extend battery life between measurements. The industrial -40 C to +85 C temperature range supports both home and clinical environments.
Recommended
Home Appliance User Interface
Washing machines, microwave ovens, and air-conditioner wall controllers are typical home-appliance HMIs where the PIC18LF8490T-I/PT's integrated LCD driver reduces board area and component count. The PIC18 core runs the user-interface state machine in C using the free XC8 compiler, while the 66 I/O pins handle keypad matrix scanning, rotary encoders, relay drivers, and buzzer PWM. The 2.0 V to 5.5 V supply supports direct 5 V regulated rails.
Recommended
Automotive Instrument Cluster Auxiliary Display
In secondary automotive cluster readouts (odometer, trip computer, climate status), the PIC18LF8490T-I/PT can drive a segmented LCD for trip data while the main graphic cluster uses a more powerful MCU. The wide operating temperature window, on-chip EEPROM, and integrated ADC suit 12 V automotive environments when paired with a regulated 5 V supply. Note that for primary safety-critical displays, an AEC-Q100-qualified part should be selected instead.
Recommended
Remote Sensor Terminal with LCD Status
The PIC18LF8490T-I/PT fits remote sensor terminals (weather stations, agricultural monitors, IoT edge nodes with local displays) where battery life and a visible status panel are both required. The integrated LCD displays sensor readings locally, the nanoWatt sleep current extends battery intervals, and the USART/SPI/I2C peripherals connect to radios (LoRa, sub-GHz transceivers, BLE modules). The 10-bit ADC reads multiple analogue sensors without external multiplexers.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF8490T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF8490-I/PT | PIC18F8490T-I/PT | PIC18F8490-I/PT | PIC18LF8393-I/PT | PIC18LF8390-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-80 (PT), 12x12 mm | TQFP-80 (PT), 12x12 mm - same | TQFP-80 (PT), 12x12 mm - same | TQFP-80 (PT), 12x12 mm - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC18 8-bit RISC, 40 MHz / 16 MIPS | PIC18 8-bit, 40 MHz / 16 MIPS | PIC18 8-bit, 40 MHz / 16 MIPS | PIC18 8-bit, 40 MHz / 16 MIPS | PIC18 8-bit, 40 MHz / 16 MIPS | PIC18 8-bit, 40 MHz / 16 MIPS |
| Integrated LCD Driver | Yes (up to 192 segments) | Yes (up to 192 segments) | Yes (up to 192 segments) | Yes (up to 192 segments) | Yes (segment count varies) | Yes (segment count varies) |
| ADC | 10-bit, 12 channels | 10-bit, 12 ch | 10-bit, 12 ch | 10-bit, 12 ch | 10-bit (channels vary) | 10-bit (channels vary) |
| Operating Voltage | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (F extended) | 2.0 V to 5.5 V (F extended) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) |
| 1-pc Unit Price (USD, as of 2026-09-29) | $9.42 | ~$9.40 | ~$9.80 | ~$9.80 | ~$8.50 | ~$8.20 |
Key Differentiators
- Integrated 192-segment LCD driver removes external controller (vs PIC18LF46K80-I/PT (no LCD))
- Largest flash in the PIC18LF84xx LCD-driver family (vs PIC18LF8393-I/PT)
- Lower-power LF variant versus standard F (vs PIC18F8490T-I/PT)
Design Notes
Use a single 0.1 microfarad X7R ceramic decoupling capacitor as close as possible to each VDD/VSS pair, plus one bulk 10 microfarad tantalum or ceramic near the regulator. For battery-powered designs, leverage the nanoWatt Sleep mode with the LCD driver active in 'LCD Sleep' to maintain a display while drawing microampere-level current.
Route the ICSP signals (PGC, PGD, MCLR/VPP) to a 5-pin header with short traces and no series resistors greater than 100 ohm to preserve programming reliability. Place the 32.768 kHz crystal (if used for RTCC) close to the T1OSO/T1OSI pins with a guard ring tied to ground to reduce noise coupling into the LCD charge pump.
Do not leave MCLR floating; tie it to VDD through a 10 kohm pull-up for normal operation and through the ICSP header for in-circuit programming. Configure unused I/O pins as outputs driven low to minimise supply current in sleep mode. Verify the LCD bias network (capacitors on VLCD pins) matches the chosen multiplex duty and number of segments, otherwise contrast will be uneven or the panel will ghost.
Compliance Information
Lead-free / RoHS compliant per Microchip product listings. Not AEC-Q100 qualified; for primary automotive safety applications, choose a Q100-graded PIC18 variant instead. Halogen-free status not stated in the verified data.
