PIC18F65J94-I/PT - 8-bit 64MHz PIC MCU 32KB Flash USB LCD | Microchip
MPN: PIC18F65J94-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.93 | $5.93 |
| 10 | $5.34 | $53.40 |
| 100 | $4.75 | $475.00 |
| 500 | $4.28 | $2,140.00 |
| 1,000 | $3.89 | $3,890.00 |
PIC18F65J94-I/PT Overview
A PIC18 microcontroller is an 8-bit Harvard-architecture RISC MCU from Microchip's PIC family, widely used for embedded control. The PIC18F65J94 belongs to the PIC18J subfamily and sits within the broader PIC18 > PIC > 8-bit MCU > microcontroller > semiconductor taxonomy. It combines the standard PIC18 peripheral set with two rare features for an 8-bit MCU: a Full-Speed USB 2.0 device peripheral and a segmented LCD driver that supports up to 256 segments, eliminating the need for an external driver.
Key features include 32KB (16K x 16) Flash with self-programmability, 4KB RAM, 12-bit ADC with up to 16 channels, hardware RTCC, CTMU (Charge Time Measurement Unit) for capacitive touch, hardware CRC, mTouch support, nanoWatt XLP sleep modes drawing under 100 nA, and a Vbat mode for RTC retention from a backup battery. The 64-pin TQFP gives access to 52 digital I/O pins plus dedicated analog, USB, and LCD segment pins.
The architecture uses an 8-bit data path with 16-bit instructions and a two-stage pipeline, delivering 16 MIPS at 64MHz while consuming significantly less power than 32-bit alternatives. The CTMU block enables cost-effective capacitive touch sensing, and the 12-bit ADC plus dedicated op-amp front-ends make the part suitable for sensor-interface designs without external analog ICs.
Typical applications include USB-connected human-interface devices, segment-LCD user-interface panels (appliance controls, metering, industrial HMIs), capacitive-touch keypads, battery-powered data loggers, and consumer/industrial sensor nodes. The wide Vbat support makes it especially attractive for products that must keep a real-time clock running while the main supply is removed.
When designing with the PIC18F65J94-I/PT, place the decoupling network close to the VDD/VCAP pins and ensure the 64-pin TQFP pad has adequate copper for thermal dissipation. The MPLAB X IDE with XC8 compiler is the recommended toolchain, and Microchip's USB Framework and mTouch libraries substantially cut firmware development time for the integrated peripherals.
This page synthesizes drop-in alternatives, distributor pricing, and practical design notes that go beyond what is found on the Microchip datasheet alone, helping engineers choose between the PIC18F65J94 and its pin-compatible family members.
Drop-in alternatives for PIC18F65J94-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 PIC18F65J94-I/PT (same form factor and footprint) — differing in ADC, Package, Operating Temperature, Timers, Communication.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F65J94T-I/PT
✅ Drop-In✓ In Stock
$3.2 / Unit
View Datasheet →PIC18F67J94-I/PT
✅ Drop-In✓ In Stock
$4.35 / Unit
View Datasheet →PIC18F66J94-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.1 / Unit
View Datasheet →PIC18F65J90-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F65J11-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.35 / Unit
View Datasheet →PIC18F65J94-I/PT Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit RISC Microcontroller |
| Core | PIC18 (Harvard RISC) |
| Family | PIC18FxxJ94 (XLP, USB, LCD) |
| CPU Architecture | 8-bit data, 16-bit instructions, 2-stage pipeline |
| Maximum CPU Frequency | 64 MHz (16 MIPS) |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data RAM | 4 KB |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| I/O Pins | 52 (digital) + analog/USB/LCD |
| Package | TQFP-64 (PT) 10x10x1 mm |
| ADC | 12-bit, up to 16 channels |
| USB | USB 2.0 Full-Speed (12 Mbps) device |
| LCD Driver | Up to 256 segments |
| Operating Temperature | -40 C to +85 C (Industrial, -I) |
| Mounting Type | Surface Mount |
| MSL Level | 3 |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC18F65J94-I/PT Pin Configuration
| Pin 1 | RH0/SEG32 — Digital I/O RH0 / LCD segment 32 |
| Pin 2 | RH1/SEG33 — Digital I/O RH1 / LCD segment 33 |
| Pin 3 | RH2/SEG34 — Digital I/O RH2 / LCD segment 34 |
| Pin 4 | RH3/SEG35 — Digital I/O RH3 / LCD segment 35 |
| Pin 5 | VUSB — USB internal voltage regulator output |
| Pin 6 | VDD — Positive supply (2.0 V to 3.6 V) |
| Pin 7 | Vbat — Backup battery for RTCC |
| Pin 8 | AVDD — Analog supply for ADC |
| Pin 9 | AVSS — Analog ground |
| Pin 10 | RA0/AN0 — Analog input 0 / digital I/O |
| Pin 11 | RA1/AN1 — Analog input 1 / digital I/O |
| Pin 12 | RA2/AN2/CVREF — Analog input 2 / CVREF output |
| Pin 13 | RA3/AN3 — Analog input 3 / digital I/O |
| Pin 14 | RA4/AN4 — Analog input 4 / digital I/O |
| Pin 15 | RA5/AN5 — Analog input 5 / digital I/O |
| Pin 16 | RA6 — Digital I/O RA6 |
| Pin 17 | RA7 — Digital I/O RA7 |
| Pin 18 | VSS — Digital ground |
| Pin 19 | VCAP — Internal voltage regulator filter capacitor |
| Pin 20 | RB0/INT0 — Digital I/O RB0 / external interrupt 0 |
| Pin 21 | RB1/INT1 — Digital I/O RB1 / external interrupt 1 |
| Pin 22 | RB2/INT2 — Digital I/O RB2 / external interrupt 2 |
| Pin 23 | RB3/INT3 — Digital I/O RB3 / external interrupt 3 |
| Pin 24 | RB4 — Digital I/O RB4 |
| Pin 25 | RB5 — Digital I/O RB5 |
| Pin 26 | RB6/ICSPCLK — Digital I/O RB6 / ICSP clock |
| Pin 27 | RB7/ICSPDAT — Digital I/O RB7 / ICSP data |
| Pin 28 | RC0 — Digital I/O RC0 |
| Pin 29 | RC1 — Digital I/O RC1 |
| Pin 30 | RC2 — Digital I/O RC2 |
| Pin 31 | RC3 — Digital I/O RC3 |
| Pin 32 | RC4 — Digital I/O RC4 |
| Pin 33 | RC5 — Digital I/O RC5 |
| Pin 34 | RC6 — Digital I/O RC6 |
| Pin 35 | RC7 — Digital I/O RC7 |
| Pin 36 | RD0 — Digital I/O RD0 |
| Pin 37 | RD1 — Digital I/O RD1 |
| Pin 38 | RD2 — Digital I/O RD2 |
| Pin 39 | RD3 — Digital I/O RD3 |
| Pin 40 | RD4 — Digital I/O RD4 |
| Pin 41 | RD5 — Digital I/O RD5 |
| Pin 42 | RD6 — Digital I/O RD6 |
| Pin 43 | RD7 — Digital I/O RD7 |
| Pin 44 | RE0 — Digital I/O RE0 |
| Pin 45 | RE1 — Digital I/O RE1 |
| Pin 46 | RE2 — Digital I/O RE2 |
| Pin 47 | RE3 — Digital I/O RE3 |
| Pin 48 | RE4 — Digital I/O RE4 |
| Pin 49 | RE5 — Digital I/O RE5 |
| Pin 50 | RE6 — Digital I/O RE6 |
| Pin 51 | RE7 — Digital I/O RE7 |
| Pin 52 | RF0 — Digital I/O RF0 |
| Pin 53 | RF1 — Digital I/O RF1 |
| Pin 54 | RF2 — Digital I/O RF2 |
| Pin 55 | RF3 — Digital I/O RF3 |
| Pin 56 | RF4 — Digital I/O RF4 |
| Pin 57 | RF5 — Digital I/O RF5 |
| Pin 58 | RF6 — Digital I/O RF6 |
| Pin 59 | RF7 — Digital I/O RF7 |
| Pin 60 | RG0 — Digital I/O RG0 |
| Pin 61 | RG1 — Digital I/O RG1 |
| Pin 62 | RG2 — Digital I/O RG2 |
| Pin 63 | RG3 — Digital I/O RG3 |
| Pin 64 | RG4 — Digital I/O RG4 |
Typical Applications
PIC18F65J94-I/PT is suitable for 6 applications: USB Human Interface Devices, Segment LCD Display Panels, Capacitive Touch Keypads, Battery-Powered Data Loggers, Industrial Sensor Nodes, Consumer Appliance Controllers.
USB Human Interface Devices
The PIC18F65J94-I/PT's integrated Full-Speed USB 2.0 device peripheral with on-chip transceiver makes it ideal for USB keyboards, mice, gamepads and custom HID peripherals. The 32 KB Flash is enough to hold the USB stack plus an HID report descriptor, while 4 KB RAM comfortably buffers incoming/outgoing reports. Operating at 64 MHz / 16 MIPS, the core can sustain polling rates above 1 kHz with headroom for debounce, lighting effects, and capacitive-touch keys via the on-chip CTMU.
Recommended
Segment LCD Display Panels
With up to 256 segments of on-chip LCD drive, the PIC18F65J94-I/PT removes the need for an external LCD driver in appliance, metering, and industrial-HMI designs. The 52 I/O pins allow up to 4 COM x 64 SEG or 8 COM x 32 SEG configurations, and the 32 KB Flash holds multilingual strings plus the GUI logic. The 12-bit ADC and CTMU enable simultaneous sensor input and capacitive-touch keys without extra analog ICs.
Recommended
Capacitive Touch Keypads
The PIC18F65J94-I/PT integrates Microchip's CTMU and mTouch library, supporting capacitive touch sensing directly on the digital I/O pins - perfect for sealed-appliance keypads and industrial controls. Combined with the segment LCD driver, a single chip handles touch input and display output, dramatically reducing BOM cost. The nanoWatt XLP sleep current keeps idle touch-scanning power budgets under 1 mA.
Recommended
Battery-Powered Data Loggers
The PIC18F65J94-I/PT runs from 2.0 V to 3.6 V with nanoWatt XLP sleep modes drawing under 100 nA and a dedicated Vbat pin for RTC retention. Its 12-bit ADC, hardware RTCC, and 4 KB RAM let it timestamp and store sensor readings for hours or weeks on a single cell. The wide supply range also allows direct operation from 2 x AA alkaline cells with no boost converter required.
Recommended
Industrial Sensor Nodes
With 16 ADC channels, hardware CRC, CTMU, and a robust -40 C to +85 C industrial temperature range, the PIC18F65J94-I/PT fits industrial sensor-interface nodes that aggregate multiple transducers. The USB device port enables convenient firmware updates or tethered diagnostics on the factory floor. The 32 KB Flash comfortably holds CAN-style or Modbus protocol stacks via bit-banged UARTs when full networking is not required.
Recommended
Consumer Appliance Controllers
Washing machines, microwave ovens, and induction cooktops benefit from the PIC18F65J94-I/PT's combination of segment-LCD control, capacitive-touch buttons, USB service port, and Vbat-backed RTC. The 52 I/O pins drive relays, triacs and indicator LEDs directly, and the wide 2.0 V to 3.6 V supply simplifies mixed 3.3 V/5 V designs. The XLP sleep modes help meet strict standby-power regulations such as the EU EcoDesign directive.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F65J94-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F65J94T-I/PT | PIC18F67J94-I/PT | PIC18F66J94-I/PT | PIC18F65J90-I/PT | PIC18F65J11-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (PT) 10x10 mm | TQFP-64 (PT) 10x10 mm | TQFP-64 (PT) 10x10 mm | TQFP-64 (PT) 10x10 mm | TQFP-64 (PT) 10x10 mm | TQFP-64 (PT) 10x10 mm |
| Program Flash | 32 KB | 32 KB | 128 KB | 64 KB | 32 KB | 32 KB |
| RAM | 4 KB | 4 KB | 8 KB | 8 KB | 4 KB | 2 KB |
| Max Frequency | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS |
| USB Peripheral | USB FS device, integrated | USB FS device, integrated | USB FS device, integrated | USB FS device, integrated | External transceiver required | USB FS device, integrated |
| Segment LCD Driver | Up to 256 segments | Up to 256 segments | Up to 256 segments | Up to 256 segments | Up to 256 segments | None |
| nanoWatt XLP | Yes | Yes | Yes | Yes | Yes | No |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
Key Differentiators
- Integrated Full-Speed USB 2.0 with on-chip transceiver (vs PIC18F65J90-I/PT)
- 256-segment LCD driver plus nanoWatt XLP on the same die (vs PIC18F65J11-I/PT)
- 32 KB Flash with PIC18 instruction-set compatibility (vs PIC18F67J94-I/PT)
Design Notes
The PIC18F65J94-I/PT operates from 2.0 V to 3.6 V. Place a 100 nF decoupling capacitor within 5 mm of each VDD/AVDD/VCAP pair and a bulk 4.7 uF to 10 uF tantalum or ceramic on the main supply rail. The Vbat pin supports a backup battery (typically CR2032) to retain the RTCC when VDD is removed - size the series resistor per the datasheet's Vbat section to limit inrush current. Use nanoWatt XLP sleep modes (DID = 0x3F) to drop idle current below 100 nA in battery data-logger designs.
The TQFP-64 (10x10 mm) package has a thermal resistance of approximately 35 C/W theta-JA on a 4-layer JEDEC test board. Tie all VSS/AVSS pins to a solid ground pour and stitch the VDD traces with vias to inner power planes to keep digital return currents short. Place the 32.768 kHz crystal and load capacitors as close as possible to SOSCO/SOSCI to minimize cycle-to-cycle jitter on the RTCC and USB-derived baud rates.
Do not leave the VUSB pin floating - it requires a 220 nF decoupling capacitor for the internal USB voltage regulator. Avoid driving the USB DP/DM pins with a 5 V rail; the PIC18F65J94 is a 3.3 V part and the USB lines are not 5 V tolerant. When migrating code from PIC18F45K22-style designs, note that the J94 family uses a different Configuration Word layout and oscillator tuning register map - rebuild the configuration bits rather than copy-pasting them.
Compliance Information
Per Abacus Electronics compliance summary the PIC18F65J94-I/PT is EU RoHS and REACH compliant with DRC conflict-free status. AEC-Q100 automotive qualification is not claimed - choose PIC18F46J11T-I/PT or PIC18F67J94T-I/PT from the same family if AEC-Q100 is required.
