PIC18F65J11-I/PT - 8-bit PIC18 MCU, 32KB Flash, 40MHz, TQFP-64 | Microchip
MPN: PIC18F65J11-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.78 | $6.78 |
| 10 | $6.1 | $61.00 |
| 100 | $5.42 | $542.00 |
| 500 | $4.9 | $2,450.00 |
| 1,000 | $4.35 | $4,350.00 |
PIC18F65J11-I/PT Overview
An 8-bit microcontroller (MCU) is a compact computing-on-a-chip that integrates a CPU, program memory (Flash), data memory (RAM), and peripherals into a single silicon die. The PIC18 family is a high-performance 8-bit architecture with an enhanced instruction set, hardware multiplier, and C-friendly design. Positioned in the broader taxonomy, an MCU sits within the semiconductor > integrated circuit > microcontroller > 8-bit MCU hierarchy, and is widely used where deterministic real-time control, low cost, and ease of programming outweigh the need for higher CPU throughput.
Key differentiating features of the PIC18F65J11 include 32KB of self-programmable Flash organized as 16K x 16 words, an internal 8 MHz oscillator with PLL options, dual analog comparators, two USART modules, a master I2C and SPI peripheral set, four 16-bit timers, and nanoWatt Technology power modes that lower sleep current below typical competitors. The device also supports in-circuit serial programming (ICSP) and In-Circuit Debug (ICD) for production-friendly firmware development.
Architecturally, the PIC18J core employs a 16-bit instruction word with Harvard bus separation and a hardware multiply engine, providing 10 MIPS at 40 MHz. The 64-pin TQFP package exposes the full peripheral set including external memory interfaces, making this part well-suited to applications that demand both signal conditioning and user-interface handling.
Typical applications for the PIC18F65J11-I/PT include data loggers, industrial controllers, automotive body and climate modules, consumer appliances, USB peripherals, and general-purpose embedded control. With 51 available I/O pins, designers can drive keypads, LCDs, multiple sensors, and communication buses without external glue logic.
When designing with this MCU, reserve one I/O pin for the MCLR reset function and add the recommended 10 kohm pull-up plus a decoupling capacitor as per Microchip application note guidelines. Surface-mount TQFP-64 assembly requires standard JEDEC MS-026 land patterns and reflow profiles consistent with Pb-free / RoHS-compliant SAC305 solder.
This page synthesizes distributor stock and pricing, validated drop-in alternatives, and practical design notes not found in the standalone datasheet.
Drop-in alternatives for PIC18F65J11-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 PIC18F65J11-I/PT (same form factor and footprint) — differing in Package, ADC, Operating Temperature, I/O Pins, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F65J10-I/PT
✅ Drop-In✓ In Stock
$4.4 / Unit
View Datasheet →PIC18F65J11T-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F66J11-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F67J11-I/PT
✅ Drop-In✓ In Stock
$5.4 / Unit
View Datasheet →PIC18F85J11-I/PT
✅ Drop-In✓ In Stock
$3.76 / Unit
View Datasheet →PIC18F64J11-I/PT
✅ Drop-In✓ In Stock
$3.25 / Unit
View Datasheet →PIC18F65J11-I/PT Maximum Ratings & Electrical Characteristics
| Architecture | PIC18J, 8-bit RISC, 16-bit instruction word |
| Program Memory | 32 KB Flash (16K x 16 words), self-programmable |
| Data RAM | 2048 bytes |
| Operating Frequency | Up to 40 MHz (10 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| I/O Pins | 51 digital I/O (54 port pins total) |
| ADC | 12-channel, 10-bit |
| Timers | 4 x 16-bit timers |
| Communication | 2x USART, 1x SPI, 1x I2C (Master) |
| Comparators | 2 analog comparators |
| Internal Oscillator | 8 MHz with PLL options |
| Power-Saving Modes | nanoWatt Technology (sleep, run, idle, etc.) |
| Package | TQFP-64 (10x10 mm, 1.0 mm height, MS-026) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial, '-I') |
| Programming/Debug | ICSP and ICD (In-Circuit Serial Programming & Debug) |
| RoHS Status | Compliant (Pb-free TQFP) |
PIC18F65J11-I/PT Pin Configuration
| Pin 1 | RC2/PWM1 — I/O port C bit 2 / PWM output |
| Pin 2 | RC3/SCL — I/O port C bit 3 / I2C clock |
| Pin 3 | RC4/SDA — I/O port C bit 4 / I2C data |
| Pin 4 | RC5/SDO — I/O port C bit 5 / SPI data out |
| Pin 5 | RC6/TX1 — I/O port C bit 6 / USART1 TX |
| Pin 6 | RC7/RX1 — I/O port C bit 7 / USART1 RX |
| Pin 7 | RD0 — I/O port D bit 0 |
| Pin 8 | RD1 — I/O port D bit 1 |
| Pin 9 | RD2 — I/O port D bit 2 |
| Pin 10 | RD3 — I/O port D bit 3 |
| Pin 11 | RC0/T1OSO — I/O port C bit 0 / Timer1 oscillator output |
| Pin 12 | RC1/T1OSI — I/O port C bit 1 / Timer1 oscillator input |
| Pin 13 | RG4 — I/O port G bit 4 |
| Pin 14 | RG3 — I/O port G bit 3 |
| Pin 15 | RG2 — I/O port G bit 2 |
| Pin 16 | RG1 — I/O port G bit 1 |
| Pin 17 | RG0 — I/O port G bit 0 |
| Pin 18 | RA0/AN0 — I/O port A bit 0 / ADC input 0 |
| Pin 19 | RA1/AN1 — I/O port A bit 1 / ADC input 1 |
| Pin 20 | RA2/AN2 — I/O port A bit 2 / ADC input 2 |
| Pin 21 | RA3/AN3 — I/O port A bit 3 / ADC input 3 |
| Pin 22 | RA4/T0CKI — I/O port A bit 4 / Timer0 clock input |
| Pin 23 | RA5/AN4 — I/O port A bit 5 / ADC input 4 |
| Pin 24 | VSS — Ground reference |
| Pin 25 | VDD — Positive supply (2.0-3.6V) |
| Pin 26 | RB0/INT0 — I/O port B bit 0 / External interrupt 0 |
| Pin 27 | RB1/INT1 — I/O port B bit 1 / External interrupt 1 |
| Pin 28 | RB2/INT2 — I/O port B bit 2 / External interrupt 2 |
| Pin 29 | RB3/INT3 — I/O port B bit 3 / External interrupt 3 |
| Pin 30 | RB4 — I/O port B bit 4 |
| Pin 31 | RB5 — I/O port B bit 5 |
| Pin 32 | RB6/PGC — I/O port B bit 6 / ICSP clock |
| Pin 33 | RB7/PGD — I/O port B bit 7 / ICSP data |
| Pin 34 | AVDD — Analog supply for ADC |
| Pin 35 | AVSS — Analog ground for ADC |
| Pin 36 | RD4 — I/O port D bit 4 |
| Pin 37 | RD5 — I/O port D bit 5 |
| Pin 38 | RD6 — I/O port D bit 6 |
| Pin 39 | RD7 — I/O port D bit 7 |
| Pin 40 | RE0/RD — I/O port E bit 0 / Parallel port read strobe |
| Pin 41 | RE1/WR — I/O port E bit 1 / Parallel port write strobe |
| Pin 42 | RE2/CS — I/O port E bit 2 / Parallel port chip select |
| Pin 43 | RF0 — I/O port F bit 0 |
| Pin 44 | RF1 — I/O port F bit 1 |
| Pin 45 | RF2 — I/O port F bit 2 |
| Pin 46 | RF3 — I/O port F bit 3 |
| Pin 47 | RF4 — I/O port F bit 4 |
| Pin 48 | RF5 — I/O port F bit 5 |
| Pin 49 | RF6 — I/O port F bit 6 |
| Pin 50 | RF7 — I/O port F bit 7 |
| Pin 51 | VSS — Ground reference |
| Pin 52 | VDD — Positive supply (2.0-3.6V) |
| Pin 53 | OSC1/CLKIN — Crystal oscillator input / external clock |
| Pin 54 | OSC2/CLKOUT — Crystal oscillator output / clock out |
| Pin 55 | RH0 — I/O port H bit 0 |
| Pin 56 | RH1 — I/O port H bit 1 |
| Pin 57 | RH2 — I/O port H bit 2 |
| Pin 58 | RH3 — I/O port H bit 3 |
| Pin 59 | RE3 — I/O port E bit 3 |
| Pin 60 | RE4 — I/O port E bit 4 |
| Pin 61 | RE5 — I/O port E bit 5 |
| Pin 62 | RE6 — I/O port E bit 6 |
| Pin 63 | RE7 — I/O port E bit 7 |
| Pin 64 | MCLR — Master clear reset (active-low), requires external pull-up |
Typical Applications
PIC18F65J11-I/PT is suitable for 7 applications: Battery-Powered Data Logger, Industrial Control PLC Module, Automotive Body and Climate Module, Consumer Appliance Control Board, USB Human Interface Device, HVAC Sensor Hub, Smart Home Edge Controller.
Battery-Powered Data Logger
The PIC18F65J11-I/PT fits battery-powered data loggers thanks to its nanoWatt Technology sleep modes and wide 2.0V-3.6V operating range. With 32KB Flash it can store MPLAB XC8-compiled firmware plus calibration lookup tables, while 2048 bytes RAM buffers sensor reads between SD card writes. The 12-channel 10-bit ADC handles multi-sensor inputs (temperature, humidity, voltage) directly, and 51 I/O pins drive SD card SPI, RTC I2C, and status LEDs without external glue logic. Industrial -40C to +85C operation supports outdoor and cold-chain deployments.
Recommended
Industrial Control PLC Module
The PIC18F65J11-I/PT is well matched to industrial control PLC I/O modules where 51 digital I/O pins directly drive relays, opto-isolators, and 24V signal conditioning. The 40 MHz core executes 10 MIPS, sufficient for PID loop control and Modbus RTU polling over USART. Two analog comparators enable threshold-based alarms without external op-amps. The wide VDD range accepts 24V industrial rails after regulation, and the -40C to +85C temperature rating covers factory floor conditions. ICSP allows firmware updates in deployed cabinets without desoldering.
Recommended
Automotive Body and Climate Module
The PIC18F65J11-I/PT is used in automotive body controllers, HVAC climate modules, and seat-control units where its 12-channel ADC reads thermistors and potentiometers directly. Two USART interfaces connect to LIN sub-bus controllers and diagnostic interfaces, while the I2C peripheral drives digital temperature sensors and EEPROM. The wide supply range tolerates 12V automotive battery transients after regulation, and the TQFP-64 footprint supports compact under-dash mounting. Designers add AEC-Q100 qualified parts for production; this part is industrial-grade only.
Recommended
Consumer Appliance Control Board
In consumer appliances such as washing machines, dishwashers, and microwave ovens, the PIC18F65J11-I/PT drives keypads, character LCDs, buzzer feedback, and triac-controlled motor/ heater loads through its 51 I/O pins. The nanoWatt Technology sleep mode cuts standby current below typical appliance energy-star limits, and the 32KB Flash holds state-machine firmware plus menu localization tables. ICSP enables factory-side firmware provisioning for regional SKUs. The 10 MIPS performance handles real-time user interface response without perceivable lag.
Recommended
USB Human Interface Device
The PIC18F65J11-I/PT serves as the host MCU in low-speed USB Human Interface Devices (HIDs) such as custom keyboards, macro pads, and HID-class game controllers when paired with an external USB transceiver. The two USARTs handle USB-to-UART bridging or MIDI I/O, and the SPI peripheral drives RGB LED chains for status backlighting. With 32KB Flash, the MCU runs HID report descriptors plus macro scripting. Industrial temperature rating supports gaming peripheral and KVM switch applications in demanding environments.
Recommended
HVAC Sensor Hub
The PIC18F65J11-I/PT fits HVAC sensor hubs that aggregate temperature, humidity, and pressure sensors in commercial buildings. The 12-channel ADC handles multi-zone sensor scanning, and the I2C bus connects to modern digital sensors. USART interfaces pass aggregated telemetry to BACnet or Modbus gateways. Sleep modes between sample bursts extend battery life in wireless sensor nodes. With 51 I/O pins, designers can also integrate local keypad override and LCD readout without additional I/O expanders.
Recommended
Smart Home Edge Controller
For smart-home edge controllers aggregating Zigbee, Z-Wave, or Wi-Fi sensor data, the PIC18F65J11-I/PT acts as the local supervisor. Two USARTs bridge to wireless modules, while SPI drives non-volatile storage for event logs. The 32KB Flash supports OTA bootloader plus minimal application logic, and 2048 bytes RAM handles command queues. nanoWatt Technology sleep mode supports battery-powered wireless sensor stick-down installations. Industrial temperature operation suits unheated garage and attic deployments.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F65J11-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F65J10-I/PT | PIC18F65J11T-I/PT | PIC18F66J11-I/PT | PIC18F67J11-I/PT | PIC18F85J11-I/PT | PIC18F64J11-I/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (10x10 mm, PT) | TQFP-64 (10x10 mm, PT) | TQFP-64 (10x10 mm, PT) | TQFP-64 (10x10 mm, PT) | TQFP-64 (10x10 mm, PT) | TQFP-80 (PT) - pin-count delta | TQFP-64 (10x10 mm, PT) |
| Flash Program Memory | 32 KB (16K x 16) | 32 KB | 32 KB | 64 KB (+100%) | 128 KB (+300%) | 32 KB | 16 KB (-50%) |
| Data RAM | 2048 bytes | 2048 bytes | 2048 bytes | 2048 bytes | 2048 bytes | 2048 bytes | 2048 bytes |
| Operating Frequency | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| I/O Pins | 51 | 51 | 51 | 51 | 51 | 67 (+31%) | 34 (-33%) |
| ADC | 12-ch, 10-bit | 12-ch, 10-bit | 12-ch, 10-bit | 12-ch, 10-bit | 12-ch, 10-bit | 16-ch, 10-bit | 12-ch, 10-bit |
| Supply Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Pin Compatibility | Reference (TQFP-64) | Drop-in (TQFP-64) | Identical (TQFP-64) | Drop-in (TQFP-64) | Drop-in (TQFP-64) | Different package (TQFP-80) | Drop-in (TQFP-64) |
Key Differentiators
- Same TQFP-64 footprint but 2x Flash at 64KB (vs PIC18F66J11-I/PT)
- NanoWatt Technology low-power modes versus prior J10 family (vs PIC18F65J10-I/PT)
- Industrial temperature grade -40C to +85C versus consumer/economic parts (vs PIC18F46K22-I/P)
Design Notes
Decouple VDD and AVDD separately. Place a 100 nF ceramic capacitor as close as practical to each VDD/AVDD pin pair, and add a bulk 10 uF tantalum or aluminum-polymer capacitor on the main 3.3V rail. The PIC18F65J11's ADC accuracy depends on quiet AVDD; sharing AVDD with a noisy digital VDD without LC filtering can degrade ADC readings by 2-3 LSB. Per Microchip app note TB3019, AVSS must connect to a star-ground point that joins the analog ground plane, not a daisy-chained trace.
The TQFP-64 (10x10 mm) package has 0.5 mm pitch leads and benefits from standard JEDEC MS-026 land patterns with 0.25 mm-wide pads. Maintain a continuous ground plane beneath the IC and route signals on inner layers for cleaner EMI. Place the ICSP connector footprint on the board edge for production programming access - Microchip recommends a 6-pin 0.1-inch header with PGC/PGD/MCLR/VDD/VSS/NC pins per Microchip development tool documentation. Use Pb-free SAC305 solder paste and follow the JEDEC J-STD-020 reflow profile for MSL-3 moisture sensitivity.
Always add the MCLR external pull-up (typically 10 kohm to VDD) - leaving MCLR floating can cause spurious resets and unstable startup. The configuration bits must be set correctly before the first Flash write: disable the watchdog unless used, select the oscillator mode, and enable low-voltage programming. Avoid using OSC1 as a digital I/O when the internal RC oscillator is selected, as this can cause phantom clocking. For ADC accuracy, add a 100 nF bypass on the VREF+ pin (if used) and avoid switching heavy digital loads during ADC conversions.
Compliance Information
RoHS-compliant Pb-free TQFP-64 package per Microchip product page. NOT AEC-Q100 qualified - choose a PIC18F equivalent with Q100 suffix for automotive. Halogen-free status not explicitly disclosed; treated as unknown.
