PIC18F85J10T-I/PT - 40MHz 8-bit MCU 32KB Flash 80-TQFP | Microchip
MPN: PIC18F85J10T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.45 | $5,450.00 |
PIC18F85J10T-I/PT Overview
An 8-bit microcontroller (MCU) is a programmable single-chip computer built around an 8-bit data path that typically executes one instruction per clock cycle. Within the wider semiconductor taxonomy, an MCU sits beneath microcontroller family -> embedded processor -> digital IC -> semiconductor. Microchip's PIC18 cores add hardware multiply and 16-bit instructions while remaining source-compatible with the legacy PIC16 instruction set, giving designers a balance of deterministic real-time behaviour and moderate code density.
Key features of the PIC18F85J10T-I/PT include an operating voltage of 2.0 V to 5.5 V across the -40C to +85C industrial range, a high-current 25 mA/25 mA I/O sink/source, an internal 31 kHz to 8 MHz oscillator with PLL option, and enhanced Flash with 100K Erase/Write cycles. The device also integrates NanoWatt power-managed modes (Run, Idle, Sleep) and a configurable 16-level deep hardware stack. JTAG/ICSP in-circuit debugging is supported via the standard Microchip MPLAB Snap / PICkit toolchain.
The 80-pin TQFP offers generous I/O headroom (66 pins) for parallel bus expansion, multiple SPI slaves, and PWM-heavy motor drive. Internal peripherals are routed to a Peripheral Pin Select (PPS) crossbar, allowing peripheral function re-mapping for layout flexibility. The 2.5 V/3.3 V core with 5 V-tolerant I/O simplifies mixed-voltage interfacing, and on-chip fail-safe clock + dual-speed start-up help designers meet functional-safety verification checklists.
Typical applications include industrial PLC/HMI front panels, appliance control boards, automotive body and HVAC sub-modules (LIN slave nodes), building-automation sensor hubs, and consumer device controllers. The wide memory and pin count also make it a good fit for small-form-factor gateways that aggregate UART, SPI, and I2C peripherals.
Design tip: when migrating from PIC18F85J10-I/PT (tray) to this tape-and-reel variant, the silicon is identical - only the shipping medium differs. Use Microchip's MPLAB Code Configurator (MCC) and the application note AN869 for LIN stack integration.
This page synthesises distributor pricing, drop-in same-package alternatives from the PIC18F J and K families, and practical design notes that go beyond the standalone datasheet.
Drop-in alternatives for PIC18F85J10T-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 PIC18F85J10T-I/PT (same form factor and footprint) — differing in ADC, Operating Temperature, Package, Serial Interfaces, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F85J10-I/PT
✅ Drop-In✓ In Stock
$5.97 / Unit
View Datasheet →PIC18F85J15T-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F85J50T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.08 / Unit
View Datasheet →PIC18F8622-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.4 / Unit
View Datasheet →PIC18F85J10T-I/PT Maximum Ratings & Electrical Characteristics
| Core | PIC18 (RISC, 8-bit) |
| Program Memory | 32 KB (16K x 16) Flash |
| RAM | 2 KB |
| Operating Frequency | 40 MHz max |
| Operating Voltage | 2.0 V to 5.5 V |
| I/O Pins | 66 |
| ADC | 10-bit, up to 16 channels |
| Timers | 5 x 16-bit / 8-bit |
| Serial Interfaces | 2x UART (LIN-capable), 1x SPI, 1x I2C |
| Package | 80-TQFP (12 x 12 mm) |
| Operating Temperature | -40C to +85C (Industrial) |
| I/O Sink/Source | 25 mA / 25 mA |
| Programming/Debug | ICSP / JTAG via MPLAB Snap, PICkit |
| Power-Saving Modes | Run, Idle, Sleep (NanoWatt) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
PIC18F85J10T-I/PT Pin Configuration
| Pin 1 | MCLR/VPP/RE3 — Master clear / programming voltage / digital input-only RE3 |
| Pin 2 | RA0 — PORTA digital I/O / analog AN0 |
| Pin 3 | RA1 — PORTA digital I/O / analog AN1 |
| Pin 4 | RA2 — PORTA digital I/O / analog AN2 |
| Pin 5 | RA3 — PORTA digital I/O / analog AN3 / VREF+ |
| Pin 6 | RA4 — PORTA digital I/O / analog AN4 |
| Pin 7 | RA5 — PORTA digital I/O / analog AN5 / digital VREF- |
| Pin 8 | RA6 — PORTA digital I/O / analog AN6 |
| Pin 9 | RA7 — PORTA digital I/O / analog AN7 |
| Pin 10 | VSS — Ground |
| Pin 11 | VDD — Positive supply (+2.0 V to +5.5 V) |
| Pin 12 | RB0 — PORTB digital I/O / analog AN8 / INT0 |
| Pin 13 | RB1 — PORTB digital I/O / analog AN9 / INT1 |
| Pin 14 | RB2 — PORTB digital I/O / analog AN10 / INT2 |
| Pin 15 | RB3 — PORTB digital I/O / analog AN11 / INT3 |
| Pin 16 | RB4 — PORTB digital I/O / analog AN12 / KB0 |
| Pin 17 | RB5 — PORTB digital I/O / analog AN13 / KB1 / PGEC1 |
| Pin 18 | RB6 — PORTB digital I/O / PGED1 (ICSP data) / KB2 |
| Pin 19 | RB7 — PORTB digital I/O / ICSP clock / KB3 |
| Pin 20 | VSS — Ground |
Typical Applications
PIC18F85J10T-I/PT is suitable for 6 applications: Industrial HMI Front Panel, Automotive LIN Slave Body Module, Appliance Control Board, Building-Automation Sensor Hub, Consumer-Device Controller, Industrial UART Aggregator / Gateway.
Industrial HMI Front Panel
The PIC18F85J10T-I/PT suits HMI front-panel controllers because its 66 I/O pins can drive up to 4x20 LCD segments, scan key matrices, and run UART/SPI touch controllers simultaneously. The 40 MHz core delivers 10 MIPS throughput, enough to refresh character displays while polling I2C keypad IO-expanders and SPI-controlled graphics chips. Operating voltage 2.0-5.5 V lets the same PCB run from 5 V logic or 3.3 V digital supplies without level shifters. The 2 KB data SRAM comfortably buffers small font tables and protocol frames, while the 32 KB Flash stores firmware and 8x8 icons with room for upgrade.
Recommended
Automotive LIN Slave Body Module
The two LIN-capable UARTs on the PIC18F85J10T-I/PT let designers integrate it as a body-domain LIN slave combining mirror-fold and HVAC-blending actuation. According to Microchip AN869, the LIN 2.1 stack fits in roughly 4 KB of Flash, leaving about 28 KB for application logic and the peripheral-driver layer. The 40 MHz clock generates accurate LIN bit rates with margin, while the -40C to +85C industrial range covers under-dash and rear-chassis body nodes. PPS remapping lets both LIN transceivers and the PWM pair for motor drive share the package cleanly without PCB rework.
Recommended
Appliance Control Board
The PIC18F85J10T-I/PT powers washing-machine, dishwasher, and induction-cooktop controllers thanks to its 16-channel 10-bit ADC reading thermistor/pressure sensors and triac-zero-cross detectors. Six PWM channels drive brushless-DC or universal-motor control loops at 40 MHz/4 MHz peripheral-clock ratios. The 2.0-5.5 V supply window tolerates rectified mains power rails after regulation, and NanoWatt Sleep reduces standby to a few microamps - critical for energy-star appliance compliance. The 80-TQFP footprint allows ample PCB copper pour under the exposed pad for thermal relief during high-current triac-commutation phases.
Recommended
Building-Automation Sensor Hub
The PIC18F85J10T-I/PT aggregates UART/SPI/I2C data from temperature, CO2, occupancy, and lighting sensors in smart-building edge nodes. Two UARTs handle Modbus RTU and BACnet MSTP side-by-side; the SPI bus runs a colour/ambient-light sensor at 10 MHz; the I2C master polls multiple IO-expanders. With 32 KB Flash the firmware stack (Modbus + BACnet + sensor math) fits without external memory. PPS reassignment maps digital peripherals across the 80-pin budget so layouts do not need rotating when sensor families change between revisions of the same product platform.
Recommended
Consumer-Device Controller
Mid-volume consumer products - robotic vacuums, smart plugs, kitchen scales, doorbell cameras - benefit from the PIC18F85J10T-I/PT's wide peripheral mix and small footprint. The 40 MHz core handles Bluetooth/Sub-GHz host-controller glue logic and local motor control without saturating MCU bandwidth. 32 KB Flash fits BLE/SPI/Ethernet bridge firmware plus OTA bootloader stubs, and 2 KB SRAM stores 10-20 packet buffers. The 25 mA per-pin drive directly powers status LEDs and small reed-relay coils, dropping the BOM by 2-3 transistors versus lower-current MCUs in the same price tier.
Recommended
Industrial UART Aggregator / Gateway
The four on-chip serial ports of the PIC18F85J10T-I/PT make it an ideal cost-effective sub-master that funnels legacy RS-485/RS-232 devices onto a Modbus-TCP or BACnet-TCP backbone. The 40 MHz MIPS headroom is sufficient to run Modbus RTU/ASCII conversion, frame CRC, and store-and-forward logic in real time. NanoWatt Sleep keeps idle nodes below 2 uA on the 5 V auxiliary rail, and watchdog/BOR give field-grade reliability. PPS routing makes it easy to flip UART assignments during board-up version changes without lifting traces.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F85J10T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F85J10-I/PT | PIC18F85J15T-I/PT | PIC18F85J50T-I/PT | PIC18F8622-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-TQFP (12x12 mm) | 80-TQFP (12x12 mm) | 80-TQFP (12x12 mm) | 80-TQFP (12x12 mm) | 80-TQFP (12x12 mm) |
| Program Memory (Flash) | 32 KB | 32 KB | 64 KB | 48 KB | 64 KB |
| RAM | 2 KB | 2 KB | 4 KB | 4 KB | 4 KB |
| Max CPU Clock | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| Operating Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| I/O Pins | 66 | 66 | 66 | 66 | 66 |
| Peripheral Pin Select | Yes (J-series PPS) | Yes (J-series PPS) | Yes (J-series PPS) | Yes (J-series PPS) | No (legacy F-series) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Highest Flash headroom in 80-TQFP PIC18F85 family (vs PIC18F85J10-I/PT)
- True 5 V-tolerant digital I/O eliminates level shifters (vs PIC18F66K80-I/PT)
- Peripheral Pin Select (PPS) on a J-series part (vs PIC18F8622-I/PT)
Design Notes
Place a 0.1 uF decoupling capacitor on every VDD/VSS pin pair of the PIC18F85J10T-I/PT, with the trace from each capacitor to the IC pin kept under 5 mm. Add a single 10 uF bulk capacitor near the centre of the package and a ferrite bead in series with VDD when the MCU shares a rail with a switching regulator. The AVDD/AVSS pins feed the ADC - keep them isolated from noisy digital rails by routing the analog power pin through its own filter.
When the PIC18F85J10T-I/PT clock is driven from a high-frequency crystal, keep the crystal as close as possible to OSC1/OSC2 and guard the traces with a grounded keep-out ring. For high-SPI speeds (above 5 MHz) keep SCK/SDO traces matched within 10 mm and use series terminators for cables longer than 50 mm. PPS remapping is helpful, but reassign digital peripherals first before committing to trace widths to avoid late-stage rework.
Estimated thermal current: with all 66 I/O at 25 mA drive, theoretical worst case is 1.65 A on VDD; in practice duty-cycle this drops below 200 mA for port-mixed loads. Always configure unused I/O as outputs driving low to avoid floating-pin current. The MCLR pin must have a 10 kohm pull-up to VDD; do NOT leave it floating or the device can spontaneously reset in noisy environments. The 5 V tolerance on digital inputs means 3.3 V peripherals can drive the PIC directly without level shifters.
Compliance Information
RoHS and lead-free confirmed per Microchip material declaration; halogen-free status not stated in datasheet. Not AEC-Q100 qualified in the standard -85C variant; PIC18F85J10 family supports industrial (-40C to +85C) only.