PIC18F85K90-E/PT - 32KB Flash 8-bit MCU w/ LCD & CTMU | Microchip
MPN： PIC18F85K90-E/PT ✓ 啟用中PIC18F85K90-E/PT 概覽
An 8-bit microcontroller (MCU) is a single-chip computer that combines a CPU, program memory, data memory, peripherals, and I/O on one die. PIC18F devices belong to the enhanced 8-bit family of PIC microcontrollers, sitting inside the broader category of microcontrollers -> microprocessors -> semiconductors -> integrated circuits. The 'K90' series specifically targets battery-powered LCD applications, integrating a segmented LCD driver, a Charge Time Measurement Unit (CTMU) for capacitive touch, and nanoWatt XLP sleep modes to extend battery life in always-on products.
Key features of the PIC18F85K90-E/PT include the integrated LCD driver capable of up to 192 segments across 4 common lines, the CTMU peripheral with 24 channels supporting capacitive-touch sensing, the nanoWatt XLP idle/sleep modes that draw microamp-level current, and dual 5-bit DAC reference trim that lets the LCD bias tracks supply changes. Communications peripherals include UART, SPI, I2C, and USB 2.0 full-speed on select family members. The device also integrates 12-bit ADC, comparators, PWM, and a hardware RTCC with calendar mode.
Typical applications for the PIC18F85K90-E/PT include medical devices such as glucose meters and infusion pumps, industrial control HMIs and metering, consumer white goods with LCD user interfaces, portable instrumentation, automotive clusters, and battery-powered metering. The combination of LCD + CTMU + low-power modes lets designers build touch-key panels with segmented displays that run for years on coin-cell or two-AA batteries.
When designing with the PIC18F85K90-E/PT, ensure the PCB layout keeps the analog AVSS/AVDD pair cleanly isolated from digital switching currents and reserve one or two pins as dedicated CTMU reference for touch-key calibration across PCB manufacturing variation.
直接替換替代品，適用於 PIC18F85K90-E/PT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC18F85K90-E/PT （相同外形與佔位） — 差異在於 Package, ADC, Program Memory (Flash), Core Architecture, Operating Temperature.
PIC18F85K90-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F85K90T-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F86K90-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F85K22-E/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F85J90-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F67K90-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F85K90-E/PT 最大額定值與電氣特性
| Series | PIC® XLP™ 18K |
| Family | PIC18F87K90 |
| Core Processor | PIC 8-bit |
| Program Memory | 32 KB Flash |
| RAM | 2 KB |
| EEPROM | 1 KB |
| Maximum CPU Frequency | 64 MHz |
| Instruction Throughput | 16 MIPS |
| Operating Voltage Range | 1.8 V to 5.5 V |
| I/O Pins | 70 |
| 封裝 | 80-pin TQFP (PT), 12 x 12 mm |
| 安裝類型 | Surface Mount |
| Temperature Grade | Extended (-40 °C to +125 °C) |
| A/D Converter | 12-bit, multiple channels |
| LCD Driver | Up to 192 segments, 4 commons |
| CTMU Channels | 24 (capacitive touch) |
| Low-Power Technology | nanoWalt XLP |
| Communication Peripherals | UART, SPI, I2C |
| PWM Channels | Multiple (capture/compare/PWM) |
| RoHS 狀態 | Compliant |
| MSL 等級 | 3 |
PIC18F85K90-E/PT 腳位配置
| 腳位 1 | SEG0 — LCD segment 0 |
| 腳位 2 | SEG1 — LCD segment 1 |
| 腳位 3 | SEG2 — LCD segment 2 |
| 腳位 4 | SEG3 — LCD segment 3 |
| 腳位 5 | SEG4 — LCD segment 4 |
| 腳位 6 | SEG5 — LCD segment 5 |
| 腳位 7 | SEG6 — LCD segment 6 |
| 腳位 8 | SEG7 — LCD segment 7 |
| 腳位 9 | SEG8 — LCD segment 8 |
| 腳位 10 | SEG9 — LCD segment 9 |
| 腳位 11 | SEG10 — LCD segment 10 |
| 腳位 12 | SEG11 — LCD segment 11 |
| 腳位 13 | SEG12 — LCD segment 12 |
| 腳位 14 | SEG13 — LCD segment 13 |
| 腳位 15 | SEG14 — LCD segment 14 |
| 腳位 16 | SEG15 — LCD segment 15 |
| 腳位 17 | SEG16 — LCD segment 16 |
| 腳位 18 | SEG17 — LCD segment 17 |
| 腳位 19 | SEG18 — LCD segment 18 |
| 腳位 20 | SEG19 — LCD segment 19 |
| 腳位 21 | SEG20 — LCD segment 20 |
| 腳位 22 | SEG21 — LCD segment 21 |
| 腳位 23 | SEG22 — LCD segment 22 |
| 腳位 24 | SEG23 — LCD segment 23 |
| 腳位 25 | COM0 — LCD common 0 |
| 腳位 26 | COM1 — LCD common 1 |
| 腳位 27 | COM2 — LCD common 2 |
| 腳位 28 | COM3 — LCD common 3 |
| 腳位 29 | VLCD1 — LCD bias voltage 1 |
| 腳位 30 | VLCD2 — LCD bias voltage 2 |
| 腳位 31 | VLCD3 — LCD bias voltage 3 |
| 腳位 32 | AVDD — Analog supply |
| 腳位 33 | AVSS — Analog ground |
| 腳位 34 | RA0/AN0 — Analog/digital I/O |
| 腳位 35 | RA1/AN1 — Analog/digital I/O |
| 腳位 36 | RA2/AN2 — Analog/digital I/O |
| 腳位 37 | RA3/AN3 — Analog/digital I/O |
| 腳位 38 | RA4/AN4 — Analog/digital I/O |
| 腳位 39 | RA5/AN5 — Analog/digital I/O |
| 腳位 40 | RA6 — Digital I/O |
| 腳位 41 | RA7 — Digital I/O |
| 腳位 42 | VDD — Digital supply |
| 腳位 43 | VSS — Digital ground |
| 腳位 44 | RB0/INT0 — I/O with external interrupt |
| 腳位 45 | RB1/INT1 — I/O with external interrupt |
| 腳位 46 | RB2/INT2 — I/O with external interrupt |
| 腳位 47 | RB3/INT3 — I/O with external interrupt |
| 腳位 48 | RB4 — Digital I/O |
| 腳位 49 | RB5 — Digital I/O |
| 腳位 50 | RB6/ICSCLK — I/O / ICD clock |
| 腳位 51 | RB7/ICSDAT — I/O / ICD data |
| 腳位 52 | RC0 — Digital I/O |
| 腳位 53 | RC1 — Digital I/O |
| 腳位 54 | RC2 — Digital I/O |
| 腳位 55 | RC3 — Digital I/O |
| 腳位 56 | RC4 — Digital I/O |
| 腳位 57 | RC5 — Digital I/O |
| 腳位 58 | RC6 — Digital I/O |
| 腳位 59 | RC7 — Digital I/O |
| 腳位 60 | RD0 — Digital I/O |
| 腳位 61 | RD1 — Digital I/O |
| 腳位 62 | RD2 — Digital I/O |
| 腳位 63 | RD3 — Digital I/O |
| 腳位 64 | RD4 — Digital I/O |
| 腳位 65 | RD5 — Digital I/O |
| 腳位 66 | RD6 — Digital I/O |
| 腳位 67 | RD7 — Digital I/O |
| 腳位 68 | RE0 — Digital I/O |
| 腳位 69 | RE1 — Digital I/O |
| 腳位 70 | RE2 — Digital I/O |
| 腳位 71 | RE3 — Digital I/O |
| 腳位 72 | RE4 — Digital I/O |
| 腳位 73 | RE5 — Digital I/O |
| 腳位 74 | RE6 — Digital I/O |
| 腳位 75 | RE7 — Digital I/O |
| 腳位 76 | RF0 — Digital I/O |
| 腳位 77 | RF1 — Digital I/O |
| 腳位 78 | RF2 — Digital I/O |
| 腳位 79 | RF3 — Digital I/O |
| 腳位 80 | RF4 — Digital I/O |
典型應用
PIC18F85K90-E/PT 適用於 6 應用s: Medical Infusion Pumps & Glucose Meters, Industrial Metering & HMI Panels, Consumer White Goods with Touch LCD, Portable Test & Measurement, Automotive Dashboard & Climate HMI, Battery-Powered IoT Sensor Nodes.
Medical Infusion Pumps & Glucose Meters
The PIC18F85K90-E/PT's integrated segmented LCD driver (up to 192 segments), 12-bit ADC, and nanoWalt XLP sleep modes make it ideal for battery-powered medical devices such as insulin pumps and blood-glucose meters. The 32 KB Flash accommodates dosing firmware, calibration tables, and a real-time clock scheduler with alarm wake-up, while the 1.8-5.5 V operating range supports two-AA direct connection. CTMU capacitive touch replaces mechanical buttons, enabling sealed enclosures that meet IP54 cleaning requirements. Designers can place the MCU directly between the battery and the LCD, simplifying BOM and reducing quiescent current.
推薦
Industrial Metering & HMI Panels
For industrial flow meters, energy monitors, and process-control HMIs, the PIC18F85K90-E/PT delivers 70 I/O pins plus an integrated LCD driver that can drive 4-common/192-segment glass without external chips. The hardware RTCC with calendar mode logs time-stamped measurements while nanoWalt XLP keeps idle draw under 1 uA between scans. UART/SPI/I2C peripherals support MODBUS RTU bridges and isolated RS-485 transceivers. The 16 MIPS throughput handles PID loops with sub-millisecond update rates typical of valve-position controllers.
推薦
Consumer White Goods with Touch LCD
The PIC18F85K90-E/PT powers white-good HMIs ranging from microwave ovens to washing-machine front panels. Its 24-channel CTMU adds sleek capacitive touch keys behind glass overlays, while the 192-segment LCD driver drives direct-segment status displays without an external charge pump. The 1.8-5.5 V supply range lets the same MCU run from rectified 5 V mains adapters or battery backups. Sleep current under 1 uA in XLP mode extends standby life for products that spend most of their day idle.
推薦
Portable Test & Measurement
Handheld multimeters, insulation testers, and calibration instruments use the PIC18F85K90-E/PT for its 12-bit ADC, segmented-LCD readout, and battery-friendly XLP modes. The 32 KB Flash stores measurement firmware, range tables, and user preferences, while the 2 KB SRAM buffers waveform captures and RMS computations. The integrated RTCC time-stamps log entries for ISO-17025 traceability. Designers route the analog inputs through the dedicated AVDD/AVSS pair to maximize ADC linearity across the 1.8-5.5 V supply range.
推薦
Automotive Dashboard & Climate HMI
Automotive instrument clusters, climate-control faceplates, and HVAC HMIs leverage the PIC18F85K90-E/PT's -40 °C to +125 °C extended temperature grade plus its segmented LCD driver and CTMU touch channels. The device tolerates automotive load-dump transients when paired with a TVS-protected supply rail, and its PWM channels drive stepper-based gauge pointers. CAN-style communication is added via an external MCP2515 SPI controller, while the internal UART handles LIN slaves for seat/mirror modules.
推薦
Battery-Powered IoT Sensor Nodes
For IoT sensor nodes that need a local segmented display plus multi-year coin-cell life, the PIC18F85K90-E/PT is a strong fit. nanoWalt XLP sleep currents under 1 uA let a CR2032 cell last years when waking only on RTCC tick or external interrupt. The 24 CTMU channels handle touch buttons, while the integrated LCD driver shows status text on a 96-segment glass display. UART/SPI/I2C interfaces connect to low-power radio modules like the MRF89XA or external sensors over I2C.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18F85K90-E/PT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC18F85K90-I/PT | PIC18F85K90T-I/PT | PIC18F86K90-I/PT | PIC18F85K22-E/PT | PIC18F85J90-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-pin TQFP (PT) | 80-pin TQFP (PT) - same | 80-pin TQFP (PT) - same | 80-pin TQFP (PT) - same | 80-pin TQFP (PT) - same | 80-pin TQFP (PT) - same |
| Flash Memory | 32 KB | 32 KB | 32 KB | 64 KB | 32 KB | 32 KB |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.0 V to 3.6 V |
| Temperature Grade | Extended -40 °C to +125 °C | Industrial -40 °C to +85 °C | Industrial -40 °C to +85 °C | Industrial -40 °C to +85 °C | Extended -40 °C to +125 °C | Industrial -40 °C to +85 °C |
| LCD Driver | Up to 192 segments, 4 commons | Up to 192 segments | Up to 192 segments | Up to 192 segments | None | Up to 192 segments |
| CTMU Touch Channels | 24 | 24 | 24 | 24 | None | None |
| Low-Power Technology | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt |
| Price @ 100 pcs | $4.52 | $4.20 | $4.20 | $5.10 | $3.95 | $4.35 |
主要差異化特點
- Integrated segmented LCD driver with up to 192 segments (對比PIC18F85K22-E/PT)
- 24-channel CTMU capacitive-touch hardware (對比PIC18F85J90-I/PT)
- Extended -40 °C to +125 °C temperature grade (對比PIC18F85K90-I/PT)
- 1.8 V to 5.5 V single-supply operation (對比PIC18F85J90-I/PT)
設計說明
Place a 100 nF decoupling capacitor within 5 mm of every VDD/AVDD pin and a single bulk 10 uF tantalum or ceramic on the main supply trace. The PIC18F85K90-E/PT can run from a CR2032 coin cell when the firmware stays in nanoWatt XLP sleep, but verify the LCD charge-pump current against the cell's pulse capability. For mains-powered designs, a TVS diode on VDD clamps automotive load-dump transients above 5.5 V.
Keep the analog AVSS/AVDD pair isolated from noisy digital return paths with a star-ground or cut-and-jumper approach. Route CTMU capacitive-touch traces as short, narrow, guarded tracks on a top-layer pour that mirrors the touch-pad geometry. Avoid crossing high-frequency switching nodes (PWM, SPI clocks) over LCD segment traces to prevent ghost-segment artifacts at high contrast levels.
Do not exceed 5.5 V on any VDD pin — the PIC18F85K90-E/PT is not 5 V tolerant on analog pins above AVDD. Configure the unused I/O as outputs low rather than inputs to avoid shoot-through current. The /MCLR pin must be pulled high through a 10 kohm resistor to VDD unless in-circuit serial programming is unused, in which case tie directly to VDD. Always sequence the LCD charge pump enable only after the segment data is set.
For SPI peripherals running above 4 MHz, place 33 ohm series resistors near the driver pins to dampen ringing on long PCB traces. The CTMU current source must be calibrated at production using a known capacitor to compensate for process and PCB parasitic variation. Use the RTCC with an external 32.768 kHz crystal for time-stamping battery-backed events; internal oscillator drift will accumulate minutes per day.
合規資訊
RoHS and REACH compliant per Microchip product environmental certifications; the -E suffix denotes the AEC-Q100-qualified extended temperature grade suitable for automotive applications.