PIC18F85K90-E/PT - 32KB Flash 8-bit MCU w/ LCD & CTMU | Microchip
Référence : PIC18F85K90-E/PT ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $5.65 | $5,65 |
| 10 | $5.09 | $50,90 |
| 100 | $4.52 | $452,00 |
| 500 | $4.05 | $2 025,00 |
| 1 000 | $3.62 | $3 620,00 |
PIC18F85K90-E/PT Présentation
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.
Alternatives de remplacement direct pour PIC18F85K90-E/PT — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC18F85K90-E/PT (même facteur de forme et même empreinte) — différant par Package, ADC, Program Memory (Flash), Core Architecture, Operating Temperature.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18F85K90-I/PT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18F85K90T-I/PT
✅ Remplacement direct✓ En stock
$4.85 / unité
Voir la fiche technique →PIC18F86K90-I/PT
✅ Remplacement direct✓ En stock
$4.32 / unité
Voir la fiche technique →PIC18F85K22-E/PT
✅ Remplacement direct✓ En stock
$4.55 / unité
Voir la fiche technique →PIC18F85J90-I/PT
✅ Remplacement direct✓ En stock
$4.5 / unité
Voir la fiche technique →PIC18F67K90-I/PT
✅ Remplacement direct✓ En stock
$7.55 / unité
Voir la fiche technique →PIC18F85K90-E/PT Valeurs maximales et caractéristiques électriques
| 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 |
| Boîtier | 80-pin TQFP (PT), 12 x 12 mm |
| Type de montage | 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) |
| Statut RoHS | Compliant |
| Niveau MSL | 3 |
Configuration des broches de PIC18F85K90-E/PT
| Broche 1 | SEG0 — LCD segment 0 |
| Broche 2 | SEG1 — LCD segment 1 |
| Broche 3 | SEG2 — LCD segment 2 |
| Broche 4 | SEG3 — LCD segment 3 |
| Broche 5 | SEG4 — LCD segment 4 |
| Broche 6 | SEG5 — LCD segment 5 |
| Broche 7 | SEG6 — LCD segment 6 |
| Broche 8 | SEG7 — LCD segment 7 |
| Broche 9 | SEG8 — LCD segment 8 |
| Broche 10 | SEG9 — LCD segment 9 |
| Broche 11 | SEG10 — LCD segment 10 |
| Broche 12 | SEG11 — LCD segment 11 |
| Broche 13 | SEG12 — LCD segment 12 |
| Broche 14 | SEG13 — LCD segment 13 |
| Broche 15 | SEG14 — LCD segment 14 |
| Broche 16 | SEG15 — LCD segment 15 |
| Broche 17 | SEG16 — LCD segment 16 |
| Broche 18 | SEG17 — LCD segment 17 |
| Broche 19 | SEG18 — LCD segment 18 |
| Broche 20 | SEG19 — LCD segment 19 |
| Broche 21 | SEG20 — LCD segment 20 |
| Broche 22 | SEG21 — LCD segment 21 |
| Broche 23 | SEG22 — LCD segment 22 |
| Broche 24 | SEG23 — LCD segment 23 |
| Broche 25 | COM0 — LCD common 0 |
| Broche 26 | COM1 — LCD common 1 |
| Broche 27 | COM2 — LCD common 2 |
| Broche 28 | COM3 — LCD common 3 |
| Broche 29 | VLCD1 — LCD bias voltage 1 |
| Broche 30 | VLCD2 — LCD bias voltage 2 |
| Broche 31 | VLCD3 — LCD bias voltage 3 |
| Broche 32 | AVDD — Analog supply |
| Broche 33 | AVSS — Analog ground |
| Broche 34 | RA0/AN0 — Analog/digital I/O |
| Broche 35 | RA1/AN1 — Analog/digital I/O |
| Broche 36 | RA2/AN2 — Analog/digital I/O |
| Broche 37 | RA3/AN3 — Analog/digital I/O |
| Broche 38 | RA4/AN4 — Analog/digital I/O |
| Broche 39 | RA5/AN5 — Analog/digital I/O |
| Broche 40 | RA6 — Digital I/O |
| Broche 41 | RA7 — Digital I/O |
| Broche 42 | VDD — Digital supply |
| Broche 43 | VSS — Digital ground |
| Broche 44 | RB0/INT0 — I/O with external interrupt |
| Broche 45 | RB1/INT1 — I/O with external interrupt |
| Broche 46 | RB2/INT2 — I/O with external interrupt |
| Broche 47 | RB3/INT3 — I/O with external interrupt |
| Broche 48 | RB4 — Digital I/O |
| Broche 49 | RB5 — Digital I/O |
| Broche 50 | RB6/ICSCLK — I/O / ICD clock |
| Broche 51 | RB7/ICSDAT — I/O / ICD data |
| Broche 52 | RC0 — Digital I/O |
| Broche 53 | RC1 — Digital I/O |
| Broche 54 | RC2 — Digital I/O |
| Broche 55 | RC3 — Digital I/O |
| Broche 56 | RC4 — Digital I/O |
| Broche 57 | RC5 — Digital I/O |
| Broche 58 | RC6 — Digital I/O |
| Broche 59 | RC7 — Digital I/O |
| Broche 60 | RD0 — Digital I/O |
| Broche 61 | RD1 — Digital I/O |
| Broche 62 | RD2 — Digital I/O |
| Broche 63 | RD3 — Digital I/O |
| Broche 64 | RD4 — Digital I/O |
| Broche 65 | RD5 — Digital I/O |
| Broche 66 | RD6 — Digital I/O |
| Broche 67 | RD7 — Digital I/O |
| Broche 68 | RE0 — Digital I/O |
| Broche 69 | RE1 — Digital I/O |
| Broche 70 | RE2 — Digital I/O |
| Broche 71 | RE3 — Digital I/O |
| Broche 72 | RE4 — Digital I/O |
| Broche 73 | RE5 — Digital I/O |
| Broche 74 | RE6 — Digital I/O |
| Broche 75 | RE7 — Digital I/O |
| Broche 76 | RF0 — Digital I/O |
| Broche 77 | RF1 — Digital I/O |
| Broche 78 | RF2 — Digital I/O |
| Broche 79 | RF3 — Digital I/O |
| Broche 80 | RF4 — Digital I/O |
Applications typiques
PIC18F85K90-E/PT convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18F85K90-E/PT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- Integrated segmented LCD driver with up to 192 segments (vs PIC18F85K22-E/PT)
- 24-channel CTMU capacitive-touch hardware (vs PIC18F85J90-I/PT)
- Extended -40 °C to +125 °C temperature grade (vs PIC18F85K90-I/PT)
- 1.8 V to 5.5 V single-supply operation (vs PIC18F85J90-I/PT)
Notes de conception
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.
Informations de conformité
RoHS and REACH compliant per Microchip product environmental certifications; the -E suffix denotes the AEC-Q100-qualified extended temperature grade suitable for automotive applications.