PIC18LF6310-I/PT - 8-bit MCU 40MHz 8KB Flash 64-TQFP | Microchip
MPN: PIC18LF6310-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.41 | $8.41 |
| 10 | $7.57 | $75.70 |
| 100 | $6.74 | $674.00 |
| 500 | $5.96 | $2,980.00 |
| 1,000 | $5.32 | $5,320.00 |
PIC18LF6310-I/PT Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash/ROM), data memory (RAM), and peripherals on one die. The PIC18 family is Microchip's high-performance 8-bit line, distinguished from baseline PIC10/12/16 parts by its 16-bit instruction word, hardware multiplier, and richer peripheral set. PIC18 microcontrollers sit within the broader hierarchy of embedded controllers (8-bit MCU -> microcontroller -> semiconductor -> integrated circuit), and remain widely deployed in cost-sensitive, deterministic, real-time applications where ARM Cortex-M parts are unnecessary.
Key features of the PIC18LF6310 include 8 KB Flash, 768 B RAM, 54 digital I/O pins, a 12-bit or 10-bit ADC (peripherals vary across the family), multiple timers, and standard serial interfaces (UART, SPI, I2C). The 64-TQFP (10x10 mm) package provides ample I/O count for human-machine interface (HMI), sensor aggregation, and motor-control front-ends while staying compatible with hand-solderable and reflow-friendly SMD assembly. Industrial temperature range (-40C to +85C) and Flash program memory simplify field firmware updates.
Architecturally, the PIC18LF6310 uses an enhanced Harvard RISC core with a 16-bit instruction set and an 8-bit data path, achieving up to 10 MIPS at 40 MHz. nanoWatt XLP technology reduces sleep current into the nanoampere region, suiting battery-powered or energy-harvesting designs. The on-chip debugger and ICSP (In-Circuit Serial Programming) header allow firmware development without external programmers.
Typical applications include industrial control panels, sensor hubs, HVAC controllers, low-power remote sensors, consumer appliances, and embedded data-acquisition modules. The wide 2.0-5.5 V supply tolerance makes the part compatible with both lithium-cell and 5 V regulated buses.
When designing with this device, plan I/O assignments against the 54 available pins and verify the ADC channel count against the datasheet for the exact silicon revision. For drop-in upgrades with more memory or peripherals, the PIC18F6410-I/PT (16 KB Flash) and PIC18F8310-I/PT (extended peripheral set) share the same TQFP-64 footprint.
Drop-in alternatives for PIC18LF6310-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 PIC18LF6310-I/PT (same form factor and footprint) — differing in Operating Temperature, Package, Product Family.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F6310-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F6410-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF6410-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F8310-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF8310-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF6310T-I/PT
✅ Drop-In✓ In Stock
$2.96 / Unit
View Datasheet →PIC18LF6310-I/PT Maximum Ratings & Electrical Characteristics
| Product Family | PIC18F6310/6410/8310/8410 |
| Core Architecture | 8-bit PIC18 enhanced Harvard RISC |
| Program Memory (Flash) | 8 KB (4K x 16) |
| Data Memory (RAM) | 768 B |
| Maximum CPU Clock | 40 MHz |
| Instruction Throughput | Up to 10 MIPS |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| Operating Temperature | -40C to +85C (Industrial, "I") |
| Digital I/O Pins | 54 (maximum) |
| Package | 64-pin TQFP (PT), 10x10 mm, 1.0 mm pitch |
| Mounting Type | Surface Mount |
| Low-Power Technology | nanoWatt XLP |
| Programming/Debug | ICSP (In-Circuit Serial Programming) |
| Lead-Free / RoHS | Lead-Free / RoHS compliant |
| MSL (Moisture Sensitivity) | MSL 3 (per JEDEC J-STD-020) |
PIC18LF6310-I/PT Pin Configuration
| Pin 1 | RC0 — Digital I/O / analog input |
| Pin 2 | RC1 — Digital I/O / analog input |
| Pin 3 | RC2 — Digital I/O / analog input |
| Pin 4 | RC3 — Digital I/O / analog input |
| Pin 5 | RC4 — Digital I/O / analog input |
| Pin 6 | RC5 — Digital I/O / analog input |
| Pin 7 | RC6 — Digital I/O / TX (UART) |
| Pin 8 | RC7 — Digital I/O / RX (UART) |
| Pin 9 | RE0 — Digital I/O |
| Pin 10 | RE1 — Digital I/O |
| Pin 11 | RE2 — Digital I/O |
| Pin 12 | RE3 — Digital I/O |
| Pin 13 | VDD — Positive supply (2.0-5.5 V) |
| Pin 14 | VSS — Ground reference |
| Pin 15 | OSC1/CLKIN — Crystal oscillator input or external clock |
| Pin 16 | OSC2/CLKOUT — Crystal oscillator output |
| Pin 17 | RA0 — Digital I/O / analog input AN0 |
| Pin 18 | RA1 — Digital I/O / analog input AN1 |
| Pin 19 | RA2 — Digital I/O / analog input AN2 |
| Pin 20 | RA3 — Digital I/O / analog input AN3 |
| Pin 21 | RA4 — Digital I/O / analog input AN4 |
| Pin 22 | RA5 — Digital I/O / analog input AN5 |
| Pin 23 | RA6 — Digital I/O / oscillator |
| Pin 24 | RA7 — Digital I/O / oscillator |
| Pin 25 | VDD — Positive supply (2.0-5.5 V) |
| Pin 26 | VSS — Ground reference |
| Pin 27 | RB0 — Digital I/O / external interrupt 0 |
| Pin 28 | RB1 — Digital I/O / external interrupt 1 |
| Pin 29 | RB2 — Digital I/O / external interrupt 2 |
| Pin 30 | RB3 — Digital I/O / external interrupt 3 |
| Pin 31 | RB4 — Digital I/O / IOC |
| Pin 32 | RB5 — Digital I/O / IOC |
| Pin 33 | RB6 — Digital I/O / IOC / PGC (ICSP clock) |
| Pin 34 | RB7 — Digital I/O / IOC / PGD (ICSP data) |
| Pin 35 | VDD — Positive supply (2.0-5.5 V) |
| Pin 36 | VSS — Ground reference |
| Pin 37 | RD0 — Digital I/O |
| Pin 38 | RD1 — Digital I/O |
| Pin 39 | RD2 — Digital I/O |
| Pin 40 | RD3 — Digital I/O |
| Pin 41 | RD4 — Digital I/O |
| Pin 42 | RD5 — Digital I/O |
| Pin 43 | RD6 — Digital I/O |
| Pin 44 | RD7 — Digital I/O |
| Pin 45 | VSS — Ground reference |
| Pin 46 | VDD — Positive supply (2.0-5.5 V) |
| Pin 47 | RF0 — Digital I/O (family-dependent) |
| Pin 48 | RF1 — Digital I/O (family-dependent) |
| Pin 49 | RF2 — Digital I/O (family-dependent) |
| Pin 50 | RF3 — Digital I/O (family-dependent) |
| Pin 51 | RF4 — Digital I/O (family-dependent) |
| Pin 52 | RF5 — Digital I/O (family-dependent) |
| Pin 53 | RF6 — Digital I/O (family-dependent) |
| Pin 54 | RF7 — Digital I/O (family-dependent) |
| Pin 55 | RG0 — Digital I/O (family-dependent) |
| Pin 56 | RG1 — Digital I/O (family-dependent) |
| Pin 57 | RG2 — Digital I/O (family-dependent) |
| Pin 58 | RG3 — Digital I/O (family-dependent) |
| Pin 59 | RG4 — Digital I/O (family-dependent) |
| Pin 60 | MCLR — Master Clear (reset, active-low) |
| Pin 61 | VSS — Ground reference |
| Pin 62 | VDD — Positive supply (2.0-5.5 V) |
| Pin 63 | NC — Not connected (per datasheet pinout) |
| Pin 64 | NC — Not connected (per datasheet pinout) |
Typical Applications
PIC18LF6310-I/PT is suitable for 6 applications: Industrial Control Panels, Sensor Hub and Data Acquisition, Low-Power Remote Sensor Nodes, Consumer Appliance Controllers, HVAC and Building Automation, Educational and Hobbyist Embedded Platforms.
Industrial Control Panels
The PIC18LF6310-I/PT is well-suited for industrial control panels and HMI front-ends because it integrates 54 digital I/O pins, 8 KB Flash for panel logic, and an industrial -40C to +85C temperature grade in a 64-pin TQFP package. Its 40 MHz clock delivers the responsiveness needed to debounce mechanical switches, drive LED indicators, and multiplex 7-segment or character LCDs. The wide 2.0-5.5 V supply range lets the same board accept both 3.3 V sensor inputs and 5 V actuator outputs. Compared to smaller-pin-count PIC18 variants, the TQFP-64 gives designers headroom to assign dedicated pins to relays, optocouplers, and RS-485 transceivers without bit-banging. Use MPLAB Code Configurator to initialize UART, I/O, and timer peripherals in minutes.
Recommended
Sensor Hub and Data Acquisition
As a sensor hub front-end, the PIC18LF6310-I/PT aggregates analog and digital sensor inputs via its ADC and digital I/O, then forwards processed data over UART, SPI, or I2C to a host controller. The 8 KB Flash comfortably holds calibration tables, linearization routines, and Modbus/CAN-light protocol stacks for distributed sensor networks. nanoWatt XLP low-power technology enables battery-powered sensor nodes with idle currents in the nanoampere range, extending operational life on 2x AA cells. The 40 MHz clock supports oversampling techniques that improve ADC effective resolution beyond the native bit count, important for low-side current shunt monitoring in motor drives and power meters. Pair with an external precision reference for best DC accuracy.
Recommended
Low-Power Remote Sensor Nodes
The PIC18LF6310-I/PT excels in remote sensor nodes running on coin cells or harvested energy because its nanoWatt XLP technology drops sleep current below 1 uA, and its 2.0 V minimum supply voltage extends usable battery life. The 8 KB Flash is sufficient for periodic wake-measure-transmit duty cycles using UART- or I2C-connected radios. Industrial -40C to +85C support covers outdoor weather stations, agricultural monitors, and utility metering deployments. Choose the LF silicon explicitly for sub-3 V operation; the non-LF PIC18F6310-I/PT would brown out on partially discharged lithium primaries. Combined with a watchdog timer and brown-out reset, the device provides unattended operation for years on a single battery.
Recommended
Consumer Appliance Controllers
In consumer appliances (coffee machines, washing machines, dishwashers, microwaves), the PIC18LF6310-I/PT serves as a cost-effective main controller driving keypads, character LCDs, relays, and triac-switched heater elements. Its 54 I/O pins handle multiple key matrix scans, status LEDs, and zero-cross detection for triac phase-angle control without external logic. 8 KB Flash supports state-machine firmware with menu handling, fault logging, and user-selectable presets. The wide supply range simplifies integration with universal-input power supplies that produce 3.3 V or 5 V rails from mains. Pair with opto-isolated triac drivers for safe switching of mains-voltage loads.
Recommended
HVAC and Building Automation
Building automation and HVAC controllers benefit from the PIC18LF6310-I/PT's combination of wide supply range, industrial temperature grade, and ample Flash for protocol stacks (Modbus RTU, BACnet, or simple ASCII). The MCU can drive local thermostat loops, damper actuators, and fan controls while reporting status to a central BMS over RS-485. Industrial -40C to +85C operation handles unconditioned mechanical rooms and rooftop unit enclosures. With 8 KB Flash the device can also store scheduling logic and occupancy profiles without external EEPROM. nanoWatt XLP technology reduces standby draw in always-on wall controllers.
Recommended
Educational and Hobbyist Embedded Platforms
The PIC18LF6310-I/PT is a popular teaching platform because it pairs the well-documented PIC18 instruction set with a generous pin count, 64-pin TQFP for breakout boards, and free MPLAB X + XC8 toolchain. Students can experiment with interrupts, timers, ADC, UART, SPI, and I2C peripherals all on one chip without external memory. The 8 KB Flash is enough for full semester projects (line-following robots, weather stations, motor controllers), and the 40 MHz clock keeps real-time loop latencies well under 1 ms. The same die family migrates upward to PIC18F6410-I/PT (16 KB) or PIC18F8310-I/PT for advanced coursework without PCB redesign.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF6310-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F6310-I/PT | PIC18F6410-I/PT | PIC18LF6410-I/PT | PIC18F8310-I/PT | PIC18LF8310-I/PT | PIC18LF6310T-I/PT |
|---|---|---|---|---|---|---|---|
| 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 | TQFP-64 (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 8 KB | 8 KB (same) | 16 KB (+100%) | 16 KB (+100%) | 8 KB (same) | 8 KB (same) | 8 KB (same) |
| RAM | 768 B | 768 B (same) | 768 B (same) | 768 B (same) | 768 B (same) | 768 B (same) | 768 B (same) |
| Supply Voltage Range | 2.0 V to 5.5 V (LF) | 4.2 V to 5.5 V (non-LF) | 4.2 V to 5.5 V (non-LF) | 2.0 V to 5.5 V (LF) | 4.2 V to 5.5 V (non-LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) |
| Maximum Clock Speed | 40 MHz | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) |
| Low-Power Technology (nanoWatt XLP) | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Lifecycle Status | Active | Active | Active | Active | Active | Active | Active |
Key Differentiators
- Wide-voltage LF silicon revision (vs PIC18F6310-I/PT (non-LF))
- In-family Flash upgrade path (vs PIC18F6410-I/PT)
- Full peripheral set in 64 pins (vs PIC18LF46K22-I/PT (40 pins))
Design Notes
Decoupling: place one 100 nF ceramic capacitor as close as possible to every VDD pin (the device has multiple VDD pins on the TQFP-64 package) and one bulk 10 uF tantalum or ceramic capacitor at the supply entry point. The PIC18LF6310's wide 2.0-5.5 V supply range allows direct battery operation, but at sub-3 V rails the bulk capacitor becomes critical to surviving motor inrush or radio transmit current spikes that can pull VDD below the brown-out threshold.
Crystal layout: keep the crystal (or ceramic resonator) and its load capacitors within 5 mm of the OSC1/OSC2 pins and surround them with a ground pour to reduce EMI coupling into adjacent analog lines. The TQFP-64 has the OSC pair near the middle of one edge; route the crystal traces as a short, symmetrical differential loop. Avoid running digital switching signals under the crystal can to prevent injection of jitter.
Configuration bits: PIC18 configuration fuses (oscillator selection, watchdog, brown-out voltage, code protection) must be programmed correctly or the device may appear 'dead' on first power-up. Always set the FOSC configuration to match your oscillator hardware (HS for >4 MHz crystal, XT for 0.1-4 MHz, or INTIO for internal RC). Also configure the PWRT (power-up timer) to delay start-up until VDD stabilizes, and set BOR (brown-out reset) to a voltage below the minimum regulated rail.
Thermal management for the TQFP-64 (10x10 mm) is straightforward in normal embedded use - the die's quiescent and active current draw stays under 50 mA, limiting self-heating. Junction-to-ambient thermal resistance (theta_JA) is approximately 50 C/W on a standard 4-layer JEDEC test board. For industrial environments near 85C ambient with sealed enclosures, verify worst-case power dissipation against the thermal resistance to ensure junction temperature remains below 125C.
Compliance Information
RoHS-compliant lead-free TQFP package per Microchip product page (verified 2026-09-29). Industrial temperature grade only; AEC-Q100 automotive variants are cataloged separately under PIC18F6310 automotive ordering codes. Halogen-free status not explicitly stated in the public product listing.
