PIC18F66J93-I/PT - 48MHz, 64KB Flash LCD MCU, 64-TQFP | Microchip
MPN: PIC18F66J93-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.92 | $7.92 |
| 10 | $7.13 | $71.30 |
| 100 | $6.34 | $634.00 |
| 500 | $5.69 | $2,845.00 |
| 1,000 | $5.05 | $5,050.00 |
PIC18F66J93-I/PT Overview
What is an 8-bit LCD microcontroller? An 8-bit LCD microcontroller is a single-chip computer that combines a CPU, non-volatile Flash memory, RAM, peripherals, and an integrated segmented LCD driver. The PIC18F66J93 belongs to the taxonomy: microcontroller -> 8-bit MCU -> PIC18 family -> PIC18J LCD sub-family -> power-managed (nanoWatt XLP). It is typically chosen when a product needs a graphical or numeric LCD readout without an external LCD controller, plus analog sensing.
Key features include 64 KB of self-programmable Flash, 4 KB of RAM, integrated segmented LCD driver (up to 64 segments typical), 12-bit A/D with 12 input channels, nanoWatt XLP for ultra-low sleep currents, multiple communication peripherals (UART, SPI, I2C), and a wide operating voltage range. The integrated LCD driver eliminates an external charge-pump IC and reduces BOM cost in handheld products.
From a technical-depth perspective, the PIC18F66J93 uses an enhanced Harvard architecture with a C-optimized instruction set, hardware multiplier, and 31-level hardware stack. The nanoWatt XLP technology delivers deep-sleep currents in the nanoampere range, making the device suitable for battery-powered meters. The integrated 12-bit ADC includes internal reference and automatic acquisition modes for accurate sensor measurements.
Typical applications include handheld battery-powered meters, thermostats and HVAC controllers, home security panels, portable medical devices (glucometers, BP monitors), and utility metering products. The combination of integrated LCD, ADC, and low-power operation makes the part a single-chip solution for these applications.
When designing with this device, plan the LCD segment routing carefully because the maximum segment count depends on the chosen pin assignment and multiplexing mode. Use Microchip's MPLAB X IDE and the PIC18F66J93 Peripheral Library to accelerate firmware development. Provide a decoupling capacitor pair (100 nF + 10 uF) close to VDD/VSS to ensure ADC and LCD reference stability.
This page synthesizes distributor pricing, drop-in compatible PIC18 family alternatives from the same TQFP-64 footprint, and practical design notes not consolidated in the manufacturer datasheet alone.
Drop-in alternatives for PIC18F66J93-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 PIC18F66J93-I/PT (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Core, LCD Driver.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F66J94-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.1 / Unit
View Datasheet →PIC18F65J94-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.89 / Unit
View Datasheet →PIC18F66J90-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F66J55-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.31 / Unit
View Datasheet →PIC18F66J50T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.1 / Unit
View Datasheet →PIC18F66J93-I/PT Maximum Ratings & Electrical Characteristics
| Product Family | PIC18J (LCD PIC18) |
| Core | 8-bit PIC18 enhanced Harvard |
| CPU Speed | 48 MHz (12 MIPS) |
| Program Memory (Flash) | 64 KB (32K x 16) |
| RAM | 4 KB |
| ADC | 12-bit, 12 channels |
| LCD Driver | Integrated segmented LCD controller |
| Communication | UART, SPI, I2C |
| Low Power Technology | nanoWatt XLP |
| Package | TQFP-64 (PT) 10x10 mm |
| Operating Temperature Range | -40C to +85C (Industrial, -I suffix) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
PIC18F66J93-I/PT Pin Configuration
| Pin 1 | VDD — Positive supply voltage |
| Pin 2 | OSC1 — External oscillator input |
| Pin 3 | OSC2 — External oscillator output |
| Pin 4 | MCLR — Master clear / reset input |
| Pin 5 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 6 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 7 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Pin 8 | RA3/AN3 — PORTA bit 3 / analog input 3 |
| Pin 9 | RA4/AN4 — PORTA bit 4 / analog input 4 |
| Pin 10 | RA5/AN5 — PORTA bit 5 / analog input 5 |
| Pin 11 | RA6 — PORTA bit 6 |
| Pin 12 | RA7 — PORTA bit 7 |
| Pin 13 | VSS — Ground reference |
| Pin 14 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Pin 15 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Pin 16 | RB2 — PORTB bit 2 |
| Pin 17 | RB3 — PORTB bit 3 |
| Pin 18 | RB4 — PORTB bit 4 |
| Pin 19 | RB5 — PORTB bit 5 |
| Pin 20 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 21 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 22 | RC0 — PORTC bit 0 |
| Pin 23 | RC1 — PORTC bit 1 |
| Pin 24 | RC2 — PORTC bit 2 |
| Pin 25 | RC3 — PORTC bit 3 |
| Pin 26 | RC4 — PORTC bit 4 |
| Pin 27 | RC5 — PORTC bit 5 |
| Pin 28 | RC6 — PORTC bit 6 |
| Pin 29 | RC7 — PORTC bit 7 |
| Pin 30 | VSS — Ground reference |
| Pin 31 | VDD — Positive supply voltage |
| 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 | RE0 — PORTE bit 0 |
| Pin 41 | RE1 — PORTE bit 1 |
| Pin 42 | RE2 — PORTE bit 2 |
| Pin 43 | RE3 — PORTE bit 3 |
| Pin 44 | RE4 — PORTE bit 4 |
| Pin 45 | RE5 — PORTE bit 5 |
| Pin 46 | RE6 — PORTE bit 6 |
| Pin 47 | RE7 — PORTE bit 7 |
| Pin 48 | RF0 — PORTF bit 0 (LCD segment) |
| Pin 49 | RF1 — PORTF bit 1 (LCD segment) |
| Pin 50 | RF2 — PORTF bit 2 (LCD segment) |
| Pin 51 | RF3 — PORTF bit 3 (LCD segment) |
| Pin 52 | RF4 — PORTF bit 4 (LCD segment) |
| Pin 53 | RF5 — PORTF bit 5 (LCD segment) |
| Pin 54 | RF6 — PORTF bit 6 (LCD segment) |
| Pin 55 | RF7 — PORTF bit 7 (LCD segment) |
| Pin 56 | RG0 — PORTG bit 0 |
| Pin 57 | RG1 — PORTG bit 1 |
| Pin 58 | RG2 — PORTG bit 2 |
| Pin 59 | RG3 — PORTG bit 3 |
| Pin 60 | RG4 — PORTG bit 4 |
| Pin 61 | AVDD — Analog supply voltage |
| Pin 62 | AVSS — Analog ground |
| Pin 63 | VLCD1 — LCD bias voltage 1 |
| Pin 64 | VLCD2 — LCD bias voltage 2 |
Typical Applications
PIC18F66J93-I/PT is suitable for 6 applications: Handheld Battery-Powered Meters, Thermostats and HVAC Controllers, Home Security Panels, Portable Medical Devices, Utility Metering (Electric / Water / Gas), Industrial Control Panels.
Handheld Battery-Powered Meters
The PIC18F66J93-I/PT's nanoWatt XLP technology delivers nanoampere sleep currents and integrated 12-bit ADC makes it ideal for handheld battery-powered meters (multimeters, clamp meters). The integrated segmented LCD driver eliminates an external charge-pump IC, reducing BOM cost. Typical designs run from 2xAA cells with the 64 KB Flash and 4 KB RAM supporting user interface, calibration, and measurement history. The wide operating voltage and -40C to +85C industrial range suit outdoor metering installations.
Recommended
Thermostats and HVAC Controllers
With integrated LCD driver and 12 channels of 12-bit ADC, the PIC18F66J93-I/PT supports thermostats that display temperature, humidity, schedule, and HVAC state on a segmented LCD without an external driver. The 12 MIPS CPU enables real-time PID control loops for HVAC actuators. nanoWatt XLP allows the thermostat to retain battery-backed timekeeping for months. The 64-pin TQFP provides ample I/O for buttons, relays, and sensor interfaces.
Recommended
Home Security Panels
The PIC18F66J93-I/PT fits home security panels needing a keypad + LCD interface, multiple wired sensor zones, and a low-power standby state. Its 12-bit ADC reads multiple analog sensor channels (PIR, smoke, CO), while the integrated LCD displays zone status without an external charge-pump. UART peripherals drive GSM/Wi-Fi modules for alarm reporting. The PIC18F66J93 industrial temperature range suits garage or outdoor-mounted panels.
Recommended
Portable Medical Devices
Portable medical devices such as glucometers, BP monitors, and pulse oximeters benefit from the PIC18F66J93-I/PT's integrated 12-bit ADC (for analog sensor front ends), low-power nanoWatt XLP (extending battery life), and segmented LCD driver (displaying readings without extra ICs). The 64 KB Flash accommodates medical-grade firmware with calibration routines and on-screen user prompts. The wide temperature range supports refrigerated pharmaceutical storage monitoring.
Recommended
Utility Metering (Electric / Water / Gas)
The PIC18F66J93-I/PT is well-suited to electric, water, and gas meters that demand reliable LCD display, accurate analog sensing, and battery life measured in years. nanoWatt XLP enables sleep currents below 100 nA in metering idle mode. The 12-bit ADC and integrated LCD directly handle current-sense front ends and segmented numeric readouts. Industrial temperature range ensures operation in outdoor metering enclosures and meter pits.
Recommended
Industrial Control Panels
Industrial control panels with HMI LCD readouts benefit from the PIC18F66J93-I/PT's combination of segmented LCD, 12-bit ADC, UART/SPI/I2C peripherals, and robust -40C to +85C industrial temperature range. The 12 MIPS CPU executes menu and PID control code, while the integrated peripherals drive RS-485, Modbus, or CAN modules. The TQFP-64 footprint allows compact panel designs with sufficient I/O for buttons, LEDs, and relay drivers.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F66J93-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F66J94-I/PT | PIC18F65J94-I/PT | PIC18F66J90-I/PT | PIC18F66J55-I/PT | PIC18F66J50T-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-64 (PT) 10x10 mm | TQFP-64 (PT) 10x10 mm - same | TQFP-64 (PT) 10x10 mm - same | TQFP-64 (PT) 10x10 mm - same | TQFP-64 (PT) 10x10 mm - same | TQFP-64 (PT) 10x10 mm - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64-128 KB (variant) | 64 KB | 64 KB | 64 KB | 64 KB |
| RAM | 4 KB | 4-8 KB (variant) | 4 KB | 4 KB | 4 KB | 4 KB |
| CPU Speed | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 40 MHz / 10 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS |
| ADC Resolution | 12-bit, 12 channels | 12-bit, 12 channels | 12-bit, 12 channels | 10-bit, 12 channels | 10-bit, 12 channels | 12-bit, 12 channels |
| Integrated LCD Driver | Yes | Yes (more segments) | Yes | Yes | Yes | Yes |
| nanoWatt XLP Low Power | Yes | Yes | Yes | No | Yes | Yes |
Key Differentiators
- Integrated segmented LCD driver eliminates external charge-pump IC (vs PIC18F46K22-I/PT)
- nanoWatt XLP ultra-low sleep current for battery applications (vs PIC18F66J90-I/PT)
- 12-bit ADC vs 10-bit ADC for higher-precision analog sensing (vs PIC18F66J55-I/PT)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 5 mm of every VDD pin and a 10 uF bulk capacitor near the IC supply. Estimated: total VDD pin count is 4 (digital VDD + analog AVDD), so a 4-cap local-decoupling network plus shared bulk cap is recommended. This suppresses switching noise and ensures ADC reference stability. For battery-powered designs, route the MCU's regulated supply from an LDO with low quiescent current (e.g., MCP1700) to minimize sleep current.
Do not confuse the Industrial (-I) and Extended (-E) temperature suffixes; PIC18F66J93-I/PT is rated -40C to +85C, suitable for consumer/industrial products but NOT automotive. For automotive or outdoor-extreme environments, choose the AEC-Q100-qualified equivalent. Also confirm the bootloader/Firmware ID (DevID) before programming to avoid flashing the wrong family member. MCLR must be pulled high through a resistor for normal operation; tying it directly to VDD disables in-circuit programming.
Route the LCD segment signals to the chosen LCD glass layout carefully - the maximum segment count depends on pin assignment and multiplexing mode (1/2, 1/3, 1/4 bias). Estimated: with all 64 pins assigned, the device supports up to ~192 segments in 1/4 bias mode. Use Microchip's MPLAB X IDE with the PIC18F66J93 Peripheral Library to autogenerate configuration code, reducing firmware cycle time. Place VLCD1/VLCD2 filter caps near the IC and isolate analog AVDD from digital VDD by ferrite bead.
Compliance Information
RoHS compliant per Microchip product page. Industrial -I temperature grade (-40C to +85C). AEC-Q100 qualification: not_applicable for this part number - contact Microchip for automotive-grade equivalents.
