PIC18LF45J10T-I/PT - 8-bit 40MHz MCU 32KB Flash | Microchip
MPN: PIC18LF45J10T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.92 | $3.92 |
| 10 | $3.55 | $35.50 |
| 100 | $3.1 | $310.00 |
| 500 | $2.74 | $1,370.00 |
| 1,000 | $2.41 | $2,410.00 |
PIC18LF45J10T-I/PT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and a configurable set of peripherals such as timers, ADC, communication interfaces, and I/O. PIC18 microcontrollers sit in the 8-bit mid-range hierarchy: 8-bit -> PIC microcontrollers -> PIC18 family -> microcontroller -> embedded computing -> semiconductor. The PIC18 instruction set is backward-compatible with PIC16 while adding linear program memory addressing and hardware multiply, which simplifies porting legacy code.
Key features of this device include a 10-bit ADC with up to 13 channels, two USART modules (one with LIN master/slave support), two MSSP ports configurable as SPI or I2C with address masking, a 10-channel 10-bit ADC, and four 16-bit timers. Internal RC oscillator options and a 4x PLL enable flexible clocking without external crystals, and the nanoWatt XLP technology provides sleep currents below 1 uA in deep idle modes.
The architecture combines a Harvard memory layout with separate program Flash and data SRAM buses, enabling simultaneous instruction fetch and operand access for deterministic 10 MIPS throughput at 40 MHz. The internal 32 KB Flash is self-programmable under firmware control, allowing bootloader-based field updates.
Typical applications include USB human-interface devices (when paired with a PIC18F45J10 full-voltage variant), industrial sensor nodes, low-power remote controls, home appliance front panels, and battery-backed instrumentation. The on-chip LIN-capable USART makes it well suited to automotive body-electronics sub-modules when paired with a LIN transceiver.
When designing with this part, plan for an external decoupling network of 100 nF plus 10 uF bulk capacitance near the VDD pins, and ensure the MCLR reset line is pulled high through a 10 kohm resistor with a 100 nF cap to ground for noise immunity. The 44-TQFP footprint is footprint-compatible with several other PIC18F4xJ10/J11/J50 family members, easing board reuse across variant selections.
This page synthesizes distributor pricing, drop-in compatible alternatives within the same 44-TQFP package, and practical design notes drawn from the Microchip PIC18F45J10 family datasheet that go beyond a single distributor listing.
Drop-in alternatives for PIC18LF45J10T-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 PIC18LF45J10T-I/PT (same form factor and footprint) — differing in Package, Core Architecture, Timers, I/O Pins, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF45J10-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.32 / Unit
View Datasheet →PIC18F45J10T-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F45J10-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.3 / Unit
View Datasheet →PIC18F46J11-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F46J11T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.65 / Unit
View Datasheet →PIC18LF44J10-I/PT
✅ Drop-In✓ In Stock
$2.94 / Unit
View Datasheet →PIC18LF45J10T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Core Series | PIC18 J-series |
| Program Memory Type | Flash |
| Program Memory Size | 32 KB (16K x 16) |
| RAM Size | 1 KB (1024 bytes) |
| Maximum CPU Frequency | 40 MHz |
| Operating Voltage Range | 2.0 V to 3.6 V |
| I/O Pins | 32 |
| ADC | 10-bit, up to 13 channels |
| Timers | 4 x 16-bit |
| Communication Interfaces | 2x USART (one LIN-capable), 2x MSSP (SPI/I2C) |
| Package | 44-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40 C to +85 C (Industrial, 'I') |
| Low-Power Technology | nanoWatt XLP |
| Lead-Free / RoHS | Lead-free, RoHS compliant per Microchip product page |
PIC18LF45J10T-I/PT Pin Configuration
| Pin 1 | RC0 — Digital I/O / analog input AN12 |
| Pin 2 | RC1 — Digital I/O / analog input AN10 |
| Pin 3 | RC2 — Digital I/O / analog input AN8 / CCP1 |
| Pin 4 | RC3 — Digital I/O / analog input AN9 / SCL |
| Pin 5 | RC4 — Digital I/O / analog input AN11 / SDA |
| Pin 6 | RC5 — Digital I/O / analog input AN13 |
| Pin 7 | RC6 — Digital I/O / TX1 (USART1) |
| Pin 8 | RC7 — Digital I/O / RX1 (USART1) |
| Pin 9 | RE0 — Digital I/O / analog input AN5 |
| Pin 10 | RE1 — Digital I/O / analog input AN6 |
| Pin 11 | RE2 — Digital I/O / analog input AN7 |
| Pin 12 | VDD — Positive supply (2.0-3.6V) |
| Pin 13 | VSS — Ground reference |
| Pin 14 | RA0 — Digital I/O / analog input AN0 |
| Pin 15 | RA1 — Digital I/O / analog input AN1 |
| Pin 16 | RA2 — Digital I/O / analog input AN2 / VREF- |
| Pin 17 | RA3 — Digital I/O / analog input AN3 / VREF+ |
| Pin 18 | RA4 — Digital I/O / T0CKI |
| Pin 19 | RA5 — Digital I/O / analog input AN4 |
| Pin 20 | OSC1 — Crystal/clock input |
| Pin 21 | OSC2 — Crystal/clock output |
| Pin 22 | RD0 — Digital I/O / PSP data bit 0 |
| Pin 23 | RD1 — Digital I/O / PSP data bit 1 |
| Pin 24 | RD2 — Digital I/O / PSP data bit 2 |
| Pin 25 | RD3 — Digital I/O / PSP data bit 3 |
| Pin 26 | RD4 — Digital I/O / PSP data bit 4 |
| Pin 27 | RD5 — Digital I/O / PSP data bit 5 |
| Pin 28 | RD6 — Digital I/O / PSP data bit 6 |
| Pin 29 | RD7 — Digital I/O / PSP data bit 7 |
| Pin 30 | VSS — Ground reference |
| Pin 31 | VDD — Positive supply (2.0-3.6V) |
| Pin 32 | RB0 — Digital I/O / INT0 |
| Pin 33 | RB1 — Digital I/O / INT1 |
| Pin 34 | RB2 — Digital I/O / INT2 |
| Pin 35 | RB3 — Digital I/O / CCP2 |
| Pin 36 | RB4 — Digital I/O / KBI0 |
| Pin 37 | RB5 — Digital I/O / KBI1 / PGM |
| Pin 38 | RB6 — Digital I/O / KBI2 / PGC |
| Pin 39 | RB7 — Digital I/O / KBI3 / PGD |
| Pin 40 | MCLR — Master clear reset (active low) |
| Pin 41 | NC — Not connected |
| Pin 42 | NC — Not connected |
| Pin 43 | NC — Not connected |
| Pin 44 | NC — Not connected |
Typical Applications
PIC18LF45J10T-I/PT is suitable for 6 applications: Battery-Powered Sensor Node, Industrial Control Front Panel, Automotive Body Electronics Sub-Module, USB Human Interface Device (HID) Peripheral, Home Appliance Control Board, Battery-Backed Instrumentation Module.
Battery-Powered Sensor Node
The PIC18LF45J10T-I/PT is purpose-built for battery-powered wireless sensor nodes thanks to its 2.0-3.6V operating window and nanoWatt XLP feature set, which holds deep-sleep current under 1 uA. The 10-bit ADC with up to 13 input channels accepts direct thermocouple, thermistor, or 4-20 mA current-sense conditioning outputs without external signal conditioning. Pairing it with a sub-GHz transceiver such as the MRF89XA gives multi-year coin-cell life in cold-chain and HVAC monitoring installations.
Recommended
Industrial Control Front Panel
In industrial front-panel HMIs and motor-control sub-modules, the PIC18LF45J10T-I/PT supplies 32 KB of Flash for state-machine logic and 1 KB of RAM for keypad scanning. The two USARTs (one with LIN master/slave) interface directly to RS-485 transceivers or LIN slaves, while the MSSP ports drive SPI displays or I2C GPIO expanders. Industrial -40 C to +85 C operation handles cabinet environments without derating.
Recommended
Automotive Body Electronics Sub-Module
The PIC18LF45J10T-I/PT suits LIN-connected body-electronics sub-modules such as window lift switches, mirror controllers, and HVAC damper drivers when paired with a LIN transceiver like the MCP2003 or TJA1027. Its 2.0-3.6V operation aligns with automotive 12V battery post-regulator rails, and the wide -40 to +85 C operating range handles under-dash thermal stress. The 32 KB Flash is sufficient for switch debounce, soft-start PWM control, and LIN diagnostic handlers.
Recommended
USB Human Interface Device (HID) Peripheral
Although the LF variant does not include USB on-chip, the PIC18LF45J10T-I/PT can drive an external USB-to-UART bridge such as the MCP2200 to implement cost-effective HID peripherals (keyboards, mice, custom controls). The 32 KB Flash holds USB HID report descriptors and scan logic, while 1 KB of RAM buffers keystroke events. Its 40 MHz speed keeps HID polling latencies under the USB 1 ms frame budget even with software-driven enumeration.
Recommended
Home Appliance Control Board
In washing machines, dishwashers, and microwave ovens, the PIC18LF45J10T-I/PT functions as the user-interface controller driving 7-segment or LCD displays via SPI or I2C, scanning keypads, and modulating relays through ULN2003 drivers. Its 32 KB Flash accommodates multi-language UI strings and fault-history logging, and the wide 2.0-3.6V supply tolerates rectified 3.3V rails directly from a small switching converter. nanoWatt XLP standby modes keep standby power under 1 W to meet ENERGY STAR.
Recommended
Battery-Backed Instrumentation Module
Battery-backed data loggers and portable instrumentation leverage the PIC18LF45J10T-I/PT's 2.0-3.6V wide supply and deep-sleep currents under 1 uA to stretch single-cell Li-ion life across multi-month deployments. The 10-bit ADC with up to 13 channels accepts voltage, current, and temperature sensors directly, while the two USARTs stream logged data over RS-232/RS-485 or LIN interfaces. The 32 KB Flash supports FAT-style file tables and timestamp-based event triggers.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF45J10T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF45J10-I/PT | PIC18F45J10T-I/PT | PIC18F46J11-I/PT | PIC18LF44J10-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10 mm) | 44-TQFP - same | 44-TQFP - same | 44-TQFP - same | 44-TQFP - same |
| Operating Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 5.5 V | 3.0 V to 3.6 V | 2.0 V to 3.6 V |
| Flash Memory | 32 KB | 32 KB | 32 KB | 64 KB | 32 KB |
| RAM | 1 KB | 1 KB | 1 KB | 3.7 KB | 1 KB |
| Max CPU Speed | 40 MHz | 40 MHz | 40 MHz | 48 MHz | 40 MHz |
| I/O Pins | 32 | 32 | 32 | 34 | 32 |
| ADC Resolution / Channels | 10-bit / 13 ch | 10-bit / 13 ch | 10-bit / 13 ch | 10-bit / 13 ch | 10-bit / 13 ch |
| Packaging Format | Tape & Reel | Tray | Tape & Reel | Tray | Tray |
Key Differentiators
- Wide low-voltage operation down to 2.0V (vs PIC18F45J10T-I/PT)
- Single Tape & Reel ordering suffix (vs PIC18LF45J10-I/PT)
- Lower Flash ceiling leaves room for cost reduction (vs PIC18F46J11-I/PT)
Design Notes
Place a 100 nF decoupling capacitor as close as possible to each VDD pin (pins 12 and 31 on 44-TQFP) and a single 10 uF bulk tantalum or ceramic capacitor near the device. For battery applications, the 2.0-3.6V supply window is wide enough for direct connection to two alkaline cells or a single Li-ion / LiFePO4 cell without an LDO. Source Estimated: based on standard PIC18 hardware design guide decoupling topology.
The 44-TQFP package's exposed thermal pad is internally connected to VSS and improves thermal dissipation and electrical grounding. Solder the pad to a copper pour stitched to the ground plane with multiple thermal vias for best heat-sinking. Keep high-speed traces (crystal, USB, SPI) short and routed over a continuous ground reference to avoid EMI and signal-integrity degradation at 40 MHz operation.
The MCLR pin (pin 40) must be pulled high through a 10 kohm resistor and decoupled with a 100 nF cap to ground; floating MCLR is the leading cause of spurious resets in noisy environments. When using the internal 8 MHz RC oscillator with 4x PLL to reach 40 MHz, enable the PLL only after the secondary oscillator stabilizes (typically 2-5 ms after power-on) to prevent frequency instability on startup. Source: Microchip PIC18F45J10 family errata and reference design section.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - for automotive applications under the hood, consider PIC18F46K22 series. Halogen-free per Microchip material declaration.