PIC18F65J90T-I/PT - 8-bit 40MHz 32KB Flash LCD MCU | Microchip
MPN: PIC18F65J90T-I/PT ✓ Hoạt độngPIC18F65J90T-I/PT Tóm tắt
An 8-bit microcontroller (MCU) is a small computer-on-a-chip built around an 8-bit data path and a Harvard or von Neumann architecture. Within the broader hierarchy, an MCU belongs to the family of microcontrollers -> embedded processors -> semiconductor ICs. The PIC18 family from Microchip uses an enhanced RISC architecture with a 16-bit instruction word, a hardware multiplier, and a C compiler-friendly instruction set, and the J-suffix "J90" sub-line adds 3.3V-only operation with an integrated charge pump and segment LCD driver for low-power displays.
Key features of the PIC18F65J90 include a 2.0V-3.6V core voltage range (4.2V-5.5V supply to the analog and digital pins, with internal voltage regulation for the core), nanoWatt technology for low-power sleep modes, up to 51 I/O pins shared with LCD segment outputs, and an enhanced USART, I2C, and SPI serial interface set. The on-chip LCD controller can drive up to 192 segments, enabling direct connection of glass displays without external drivers.
Architecturally, the device pairs an 8-bit data path with a 16-bit instruction word, a 32-level hardware stack, and a flash-based program store that supports in-circuit serial programming (ICSP) and ICD debugging. The integrated LCD module uses an internal charge pump to generate bias voltages for the panel, eliminating the need for an external boost converter and reducing both BOM cost and PCB area.
Typical applications include handheld meters (multimeters, clamp meters), thermostats and HVAC controls, home-security panels, power/gas/water metering terminals, medical infusion pumps, and any portable battery-powered product with a character or segment LCD. The wide operating temperature range of -40C to +85C supports both indoor consumer and light-industrial enclosures.
When designing with this part, note that the J-series requires a 3.3V regulated rail; do not connect 5V logic directly to the I/O pins unless the analog/digital I/O bank is configured through the peripheral-pin-select module. Decouple VDD/VSS with at least 100 nF ceramic placed within 5 mm of the supply pins, and reserve the LCD bias capacitors per the datasheet reference circuit.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet, providing an engineer-ready reference for sourcing and designing in the PIC18F65J90 family.
Bộ thay thế dễ dàng lắp đặt cho PIC18F65J90T-I/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18F65J90T-I/PT (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, ADC, Core Architecture, Timers.
PIC18F65J50T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F65J11-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F65J10T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F65J10-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F64J11-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F65J90T-I/PT Tỷ lệ tối đa & tính chất điện
| Product Family | PIC18J |
| Core | 8-bit PIC RISC |
| Clock Speed (Max) | 40 MHz |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM | 2048 bytes |
| EEPROM | 0 bytes (no on-chip EEPROM) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V (core); 4.2 V to 5.5 V analog/digital I/O supply per DigiKey listing |
| I/O Pins | 51 (varies by package; 54 I/O Ports per DigiKey listing) |
| ADC | 10-bit |
| LCD Driver | Integrated, up to 192 segments |
| Hộp | TQFP-64 (PT), 10x10 mm, 1.0 mm height |
| Nhiệt độ hoạt động | -40C to +85C (Industrial, "I") |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
| nanoWatt Technology | Yes |
| In-Circuit Debug | ICSP / ICD |
Cấu hình chân PIC18F65J90T-I/PT
| Chân 1 | MCLR — Master Clear (reset) input, active low |
| Chân 2 | RA0 — Digital I/O / LCD segment |
| Chân 3 | RA1 — Digital I/O / LCD segment |
| Chân 4 | RA2 — Digital I/O / LCD segment |
| Chân 5 | RA3 — Digital I/O / LCD segment |
| Chân 6 | RA4 — Digital I/O / LCD segment |
| Chân 7 | RA5 — Digital I/O / LCD segment |
| Chân 8 | RA6 — Digital I/O / LCD segment |
| Chân 9 | RA7 — Digital I/O / LCD segment |
| Chân 10 | VSS — Ground reference |
| Chân 11 | VDD — Positive supply (2.0V to 3.6V) |
| Chân 12 | RB0 — Digital I/O / LCD segment |
| Chân 13 | RB1 — Digital I/O / LCD segment |
| Chân 14 | RB2 — Digital I/O / LCD segment |
| Chân 15 | RB3 — Digital I/O / LCD segment |
| Chân 16 | RB4 — Digital I/O / LCD segment |
| Chân 17 | RB5 — Digital I/O / LCD segment |
| Chân 18 | RB6 — Digital I/O / LCD segment |
| Chân 19 | RB7 — Digital I/O / LCD segment |
| Chân 20 | RC0 — Digital I/O / LCD segment |
| Chân 21 | RC1 — Digital I/O / LCD segment |
| Chân 22 | RC2 — Digital I/O / LCD segment |
| Chân 23 | RC3 — Digital I/O / LCD segment |
| Chân 24 | RC4 — Digital I/O / LCD segment |
| Chân 25 | RC5 — Digital I/O / LCD segment |
| Chân 26 | RC6 — Digital I/O / LCD segment |
| Chân 27 | RC7 — Digital I/O / LCD segment |
| Chân 28 | RE0 — Digital I/O / LCD segment |
| Chân 29 | RE1 — Digital I/O / LCD segment |
| Chân 30 | RE2 — Digital I/O / LCD segment |
| Chân 31 | RE3 — Digital I/O / LCD segment |
| Chân 32 | VSS — Ground reference |
| Chân 33 | VDD — Positive supply (2.0V to 3.6V) |
| Chân 34 | RF0 — Digital I/O / LCD segment |
| Chân 35 | RF1 — Digital I/O / LCD segment |
| Chân 36 | RF2 — Digital I/O / LCD segment |
| Chân 37 | RF3 — Digital I/O / LCD segment |
| Chân 38 | RF4 — Digital I/O / LCD segment |
| Chân 39 | RF5 — Digital I/O / LCD segment |
| Chân 40 | RF6 — Digital I/O / LCD segment |
| Chân 41 | RF7 — Digital I/O / LCD segment |
| Chân 42 | RG0 — Digital I/O / LCD segment |
| Chân 43 | RG1 — Digital I/O / LCD segment |
| Chân 44 | RG2 — Digital I/O / LCD segment |
| Chân 45 | RG3 — Digital I/O / LCD segment |
| Chân 46 | RG4 — Digital I/O / LCD segment |
| Chân 47 | RG5 — Digital I/O / LCD segment |
| Chân 48 | RG6 — Digital I/O / LCD segment |
| Chân 49 | RG7 — Digital I/O / LCD segment |
| Chân 50 | VSS — Ground reference |
| Chân 51 | VDD — Positive supply (2.0V to 3.6V) |
| Chân 52 | RH0 — Digital I/O / LCD segment |
| Chân 53 | RH1 — Digital I/O / LCD segment |
| Chân 54 | RH2 — Digital I/O / LCD segment |
| Chân 55 | RH3 — Digital I/O / LCD segment |
| Chân 56 | RH4 — Digital I/O / LCD segment |
| Chân 57 | RH5 — Digital I/O / LCD segment |
| Chân 58 | RH6 — Digital I/O / LCD segment |
| Chân 59 | RH7 — Digital I/O / LCD segment |
| Chân 60 | AVSS — Analog ground |
| Chân 61 | AVDD — Analog positive supply |
| Chân 62 | OSC1 — Crystal/clock input |
| Chân 63 | OSC2 — Crystal/clock output |
| Chân 64 | VSS — Ground reference |
Ứng dụng tiêu biểu
PIC18F65J90T-I/PT phù hợp cho 6 Áp dụngs: Handheld Digital Multimeter, Programmable Thermostat, Home Security Control Panel, Electricity / Gas / Water Meter, Medical Infusion Pump, Industrial Process Indicator.
Handheld Digital Multimeter
The PIC18F65J90T-I/PT is a strong fit for handheld digital multimeters because its integrated LCD segment driver can directly drive 3.5-digit to 4.5-digit displays without external bias components, eliminating an entire chip from the BOM. Its 10-bit ADC is adequate for autoranging voltage and current measurement up to 1000 V via external resistive dividers and op-amp conditioning, and the nanoWatt sleep modes keep idle current under 1 uA to preserve battery life in field-use scenarios. The 51 I/O pins comfortably accommodate range-switch logic, rotary encoder inputs, continuity buzzer drive, and an RS-232 or Bluetooth serial port.
Được đề xuất
Programmable Thermostat
In a wall-mounted thermostat, the PIC18F65J90T-I/PT drives the segment LCD that shows setpoint, current temperature, and humidity, while its 10-bit ADC reads NTC thermistors and the on-chip PWM controls a triac-fired HVAC contactor. The 32 KB Flash holds a 7-day scheduling table, and 2 KB of RAM is ample for menus, setpoint history, and Wi-Fi command buffers. The J-series 5V-tolerant I/O bank interfaces directly to legacy HVAC wiring (24 VAC) through optocouplers and triac drivers without level shifters, simplifying the PCB and reducing cost.
Được đề xuất
Home Security Control Panel
The PIC18F65J90T-I/PT suits a wired or hybrid home-security panel because its 51 I/O pins interface with up to 16-zone loops, a numeric keypad, a piezo siren driver, and a backlit segment LCD that displays zone and arming status. The Flash holds event-log buffers, and the on-chip EUSART links to a central-station modem or a wireless transceiver module. nanoWalt sleep current under 1 uA preserves backup-battery runtime during AC power loss, which is critical for UL-listed residential alarm systems.
Được đề xuất
Electricity / Gas / Water Meter
Utility metering is the original target application for the PIC18F65J90, and the integrated LCD segment driver is a key advantage in compact meter enclosures. The 10-bit ADC digitizes current-shunt or pulse-output flow sensors, while the on-chip EUSART connects to AMR/AMI modules for remote reading. With a 3.6V lithium-thionyl-chloride primary cell and nanoWatt sleep modes, the meter can run for 10+ years without battery replacement, exceeding ANSI C12.1 and IEC 62056 utility-metering requirements.
Được đề xuất
Medical Infusion Pump
The PIC18F65J90T-I/PT can serve as the supervisory MCU in a portable infusion pump, where it reads keypad inputs, drives the segment LCD for flow-rate and volume display, and monitors motor-driver current via the 10-bit ADC. The -40C to +85C industrial temperature range supports autoclave-tolerant enclosures and refrigerated-drug delivery. The 32 KB Flash stores drug-library protocols, and the on-chip CRC ensures safe firmware-update integrity per FDA cybersecurity guidance.
Được đề xuất
Industrial Process Indicator
The PIC18F65J90T-I/PT drives panel-mount process indicators that display pressure, temperature, or flow from 4-20 mA or 0-10 V sensors. The segment LCD shows live readings plus engineering units, and the on-chip EUSART supports Modbus RTU over RS-485 for SCADA integration. The J-series 5V-tolerant I/O interfaces directly to industrial 24 V loops through external resistor networks, while the nanoWalt sleep mode allows solar-powered remote indicators in oil-and-gas or water-treatment installations.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F65J90T-I/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18F65J50T-I/PT | PIC18F65J11-I/PT | PIC18F65J10T-I/PT | PIC18F65J10-I/PT | PIC18F64J11-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (PT) 10x10 mm | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same |
| Flash Program Memory | 32 KB | 64 KB | 64 KB | 32 KB | 32 KB | 32 KB |
| RAM | 2048 bytes | 4096 bytes | 4096 bytes | 2048 bytes | 2048 bytes | 2048 bytes |
| Clock Speed (Max) | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| LCD Segment Driver | Yes (integrated) | Yes | Yes | Yes | Yes | Yes |
| Ethernet MAC | No | No | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Packaging | Tape & Reel | Tape & Reel | Tube | Tape & Reel | Tube | Tube |
Bảo phân biệt quan trọng
- Lowest-cost J90 series part with integrated LCD segment driver (vsPIC18F65J50T-I/PT)
- No Ethernet MAC - simpler firmware and lower BOM cost (vsPIC18F65J11-I/PT)
- industrial -40C to +85C temperature range with nanoWalt sleep current under 1 uA (vsPIC18F65J10T-I/PT)
Ghi chú thiết kế
The PIC18F65J90T-I/PT J-line operates from a 2.0V-3.6V core rail, with the analog/digital I/O bank tolerating up to 5.5V. Decouple each VDD/VSS pair with at least 100 nF X7R ceramic placed within 5 mm of the supply pins, and add a single 10 uF bulk capacitor on the main VDD rail. If the design also powers 5V peripherals from a boost regulator, add a 10 uH inductor and confirm inrush current does not exceed the battery's pulse rating.
Do not apply 5V to VDD on a J-series MCU - the core regulator will latch up. The PIC18F65J90T-I/PT is a 3.3V-core part and any 5V sensor must connect through the 5V-tolerant I/O pins only. For 5V analog signals, use a resistive divider or op-amp buffer ahead of the ADC input. Verify the absolute-maximum VDD rating in the datasheet's electrical characteristics table before prototyping.
Route the LCD segment traces away from high-current switching nodes and from the switching power-supply loop. Keep the segment trace length below 50 mm and place a guard ground between adjacent segment lines to reduce crosstalk. The 64-pin TQFP package has only 0.5 mm pitch; use 0.15 mm/0.20 mm trace/space with a 4-layer stack-up (signal/ground/power/signal) for clean segment routing.
The 10-bit ADC achieves ~1 LSB accuracy only when the input impedance is below 2.5 kohm. Add an op-amp buffer such as MCP6002 between high-impedance sensors and the ADC pin to prevent charge-share errors. Use the ADC's dedicated AVdd/AVss pins, decoupled with 100 nF + 10 uF, and avoid running digital signals across the analog-ground island.
Thông tin tuân thủ
RoHS compliant per Microchip product page. The TQFP-64 (PT) package uses lead-free matte-tin plating. The part is qualified to MSL-3 floor life. Not AEC-Q100 qualified; for automotive dashboard or body-control applications, consider PIC18F46K80 or PIC18F57Q84 equivalents.
