PIC18F85J10-I/PT - 8-bit 40MHz 32KB Flash MCU 80-TQFP | Microchip
MPN: PIC18F85J10-I/PT ✓ نشطPIC18F85J10-I/PT نظرة عامة
A PIC18 microcontroller is an 8-bit Reduced Instruction Set Computer (RISC) core that combines Harvard-architecture program/data buses with a rich register set and 16-bit opcodes, making it a member of the broader microcontroller family (MCU -> embedded controller -> system-on-chip lite -> semiconductor IC). It is one step above the PIC16 family in performance and memory, while still maintaining the classic PIC peripheral model, and is widely used in industrial control, automotive body electronics, and consumer white-goods applications where deterministic interrupt response and ease of programming outweigh the need for 32-bit performance.
Key differentiating features include four simultaneous serial communication engines, programmable low-voltage detect (PLVD), a 10-bit ADC with up to 12 input channels, dual analog comparators, and NanoWatt sleep modes that drop quiescent current into the microampere range. The large 32 KB Flash and 2 KB RAM let designers run a real-time operating system or a USB stack, and 1024 bytes of EEPROM is provided for nonvolatile parameter storage. The wide operating voltage range of 2.0V to 3.6V accommodates both 3.3V battery-powered designs and industrial 3.3V regulated rails.
Architecturally the PIC18F85J10 uses a 16-bit program memory bus with an 8-bit data path, allowing single-cycle instruction fetch and 16-bit-wide Flash reads. The enhanced instruction set adds hardware multiply, indexed addressing with offset, and bit manipulation instructions. The interrupt controller supports prioritized vectored interrupts, and the peripheral pin-select feature on most enhanced PIC18J devices simplifies PCB routing by remapping digital peripherals to alternate pins.
Typical applications include industrial control panels with multiple serial sensor interfaces, automotive body and HVAC subsystems using LIN, smart energy meters with multiple ADC channels, white-goods user interfaces, and general-purpose embedded control boards with multiple asynchronous links. Designers also use this part in medical instrumentation front-ends and security/keypad systems where four serial ports reduce external multiplexer logic.
When designing with the PIC18F85J10-I/PT, plan the VDD/VSS pair layout carefully - the 80-pin TQFP has multiple VDD/VSS pins that must each be bypassed with a 100 nF ceramic capacitor placed within 3 mm of each pin. Use a low-TCXO-grade crystal if the USB or LIN timing budget is tight, and verify ADC acquisition time against the source impedance of the analog front-end.
This page synthesizes distributor pricing, drop-in compatible PIC18 same-package alternatives, and practical design notes not found in the manufacturer datasheet alone, giving procurement and engineering teams a single source for part selection, lifecycle status, and pin-compatibility analysis.
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الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC18F85J10-I/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Serial Interfaces, MSL Level, ADC, I/O Pins.
PIC18F85J10T-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F86J10-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F87J10-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F8722-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F85J15-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18F85J10-I/PT الحدود القصوى والخصائص الكهربائية
| Core | PIC18 8-bit RISC |
| Maximum CPU Frequency | 40 MHz (10 MIPS) |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data SRAM | 2 KB |
| EEPROM | 1024 bytes |
| ADC | 10-bit, up to 12 channels |
| Serial Interfaces | 2x MSSP (I2C/SPI) + 2x EUSART (LIN-capable) |
| Comparators | 2x analog comparators |
| جهد التغذية | 2.0 V to 3.6 V |
| درجة حرارة التشغيل | -40C to +85C (industrial, -I grade) |
| العلبة | 80-pin TQFP (12x12 mm) |
| نوع التركيب | Surface Mount |
| مستوى MSL | 3 (168 hours) |
| حالة RoHS | Compliant |
تكوين أطراف PIC18F85J10-I/PT
| دبوس 1 | RA0/AN0 — I/O / analog input channel 0 |
| دبوس 2 | RA1/AN1 — I/O / analog input channel 1 |
| دبوس 3 | RA2/AN2/VREF- — I/O / analog input / ADC VREF- |
| دبوس 4 | RA3/AN3/VREF+ — I/O / analog input / ADC VREF+ |
| دبوس 5 | RA4 — I/O (no alternate analog function on this pin per family datasheet) |
| دبوس 6 | RA5/AN4 — I/O / analog input channel 4 |
| دبوس 7 | RA6 — I/O |
| دبوس 8 | RA7 — I/O |
| دبوس 9 | VSS1 — Ground reference 1 |
| دبوس 10 | VDD1 — Positive supply 1 (2.0V-3.6V) |
| دبوس 11 | RB0/INT0 — I/O / external interrupt 0 |
| دبوس 12 | RB1/INT1 — I/O / external interrupt 1 |
| دبوس 13 | RB2 — I/O |
| دبوس 14 | RB3 — I/O |
| دبوس 15 | RB4 — I/O |
| دبوس 16 | RB5 — I/O |
| دبوس 17 | RB6/PGC — I/O / ICSP clock |
| دبوس 18 | RB7/PGD — I/O / ICSP data |
| دبوس 19 | VSS2 — Ground reference 2 |
| دبوس 20 | VDD2 — Positive supply 2 (2.0V-3.6V) |
| دبوس 21 | RC0 — I/O |
| دبوس 22 | RC1 — I/O |
| دبوس 23 | RC2 — I/O |
| دبوس 24 | RC3/SCL1 — I/O / I2C1 clock |
| دبوس 25 | RC4/SDA1 — I/O / I2C1 data |
| دبوس 26 | RC5 — I/O |
| دبوس 27 | RC6 — I/O |
| دبوس 28 | RC7 — I/O |
| دبوس 29 | VSS3 — Ground reference 3 |
| دبوس 30 | VDD3 — Positive supply 3 (2.0V-3.6V) |
| دبوس 31 | RD0 — I/O |
| دبوس 32 | RD1 — I/O |
| دبوس 33 | RD2 — I/O |
| دبوس 34 | RD3 — I/O |
| دبوس 35 | RD4 — I/O |
| دبوس 36 | RD5 — I/O |
| دبوس 37 | RD6 — I/O |
| دبوس 38 | RD7 — I/O |
| دبوس 39 | VSS4 — Ground reference 4 |
| دبوس 40 | VDD4 — Positive supply 4 (2.0V-3.6V) |
| دبوس 41 | RE0/RD — I/O / parallel slave port read |
| دبوس 42 | RE1/WR — I/O / parallel slave port write |
| دبوس 43 | RE2/CS — I/O / parallel slave port chip select |
| دبوس 44 | RF0 — I/O |
| دبوس 45 | RF1 — I/O |
| دبوس 46 | RF2 — I/O |
| دبوس 47 | RF3 — I/O |
| دبوس 48 | RF4 — I/O |
| دبوس 49 | RF5 — I/O |
| دبوس 50 | RF6 — I/O |
| دبوس 51 | RF7 — I/O |
| دبوس 52 | VSS5 — Ground reference 5 |
| دبوس 53 | VDD5 — Positive supply 5 (2.0V-3.6V) |
| دبوس 54 | RG0 — I/O |
| دبوس 55 | RG1 — I/O |
| دبوس 56 | RG2 — I/O |
| دبوس 57 | RG3 — I/O |
| دبوس 58 | RG4 — I/O |
| دبوس 59 | RG5 — I/O |
| دبوس 60 | RG6 — I/O |
| دبوس 61 | RG7 — I/O |
| دبوس 62 | VSS6 — Ground reference 6 |
| دبوس 63 | VDD6 — Positive supply 6 (2.0V-3.6V) |
| دبوس 64 | RH0 — I/O |
| دبوس 65 | RH1 — I/O |
| دبوس 66 | RH2 — I/O |
| دبوس 67 | RH3 — I/O |
| دبوس 68 | RH4 — I/O |
| دبوس 69 | RH5 — I/O |
| دبوس 70 | RH6 — I/O |
| دبوس 71 | RH7 — I/O |
| دبوس 72 | VSS7 — Ground reference 7 |
| دبوس 73 | VDD7 — Positive supply 7 (2.0V-3.6V) |
| دبوس 74 | RJ0 — I/O |
| دبوس 75 | RJ1 — I/O |
| دبوس 76 | RJ2 — I/O |
| دبوس 77 | RJ3 — I/O |
| دبوس 78 | RJ4 — I/O |
| دبوس 79 | RJ5 — I/O |
| دبوس 80 | RJ6 — I/O |
التطبيقات النموذجية
PIC18F85J10-I/PT مناسب لـ 7 التطبيقs: Industrial Control Panels, Automotive Body Electronics with LIN, Smart Energy Metering, White-Goods User Interfaces, Medical Instrumentation Front-Ends, Security and Keypad Access Systems, General-Purpose Multi-Serial Embedded Boards.
Industrial Control Panels
The PIC18F85J10-I/PT is well suited to industrial control panels that need multiple concurrent serial links to sensors, motor drives, and HMIs. Its four serial engines (2x MSSP I2C/SPI plus 2x EUSART LIN-capable) let the MCU run a Modbus RTU master on one UART, a sensor I2C bus on MSSP, and a second I2C bus for I/O expansion, all without an external multiplexer. The 12-channel 10-bit ADC handles multiple analog sensor inputs (temperature, pressure, current) with auto-sampling, while the -40C to +85C industrial temperature range tolerates cabinet environments. Designers also benefit from NanoWatt sleep modes that drop quiescent current to under 1 microamp for battery-backed panel retention logic.
موصى به
Automotive Body Electronics with LIN
The PIC18F85J10-I/PT fits automotive body-electronics modules such as door modules, HVAC panels, and seat controllers that communicate over the LIN bus. Its two enhanced USARTs support LIN 1.3/2.0 slave/master protocols with auto-baud detection, while the 32 KB Flash and 2 KB RAM are sufficient for typical body-controller firmware plus a LIN stack. The 80-pin TQFP provides ample I/O for driving relays, MOSFETs, and reading switches. Designers can route the 10-bit ADC to thermistor networks for ambient temperature sensing. For under-hood applications requiring -40C to +125C, the -E temperature grade part (PIC18F85J10-E/PT) replaces the -I variant in the same footprint.
موصى به
Smart Energy Metering
Smart electricity, water, and gas meters use the PIC18F85J10-I/PT to aggregate measurements from current transformers, optical pulse counters, and temperature sensors while running a metering algorithm in software. The 32 KB Flash holds the metering library and the calibration tables, the 1024-byte EEPROM stores nonvolatile meter constants, and the 2 KB RAM buffers samples before transmitting via the MSSP I2C link to a companion communication module (wireless M-Bus, NB-IoT, or LoRa). The 12-channel 10-bit ADC samples voltage and current channels for power calculation, and NanoWatt sleep modes minimize standby power consumption for battery-assisted metering scenarios.
موصى به
White-Goods User Interfaces
Washing machines, ovens, dishwashers, and refrigerators use the PIC18F85J10-I/PT to drive displays, scan keypads, and orchestrate appliance cycles via four independent serial buses. The I2C bus connects to a capacitive-touch controller and an EEPROM, while the SPI port drives a segment LCD controller, and the two USARTs communicate with the motor inverter and the BLE/Wi-Fi module. The 10-bit ADC reads temperature probes (NTC thermistors) and water-level sensors. With 32 KB Flash, designers can implement cycle profiles, fault diagnostics, and capacitive-touch decoding in a single MCU. The wide 2.0V to 3.6V supply range tolerates 3.3V LDO rails or 2xAA battery backup for clock retention.
موصى به
Medical Instrumentation Front-Ends
Low-to-mid complexity medical instruments such as blood-pressure monitors, pulse oximetry front-ends, and handheld diagnostic devices leverage the PIC18F85J10-I/PT for sensor signal conditioning, ADC sampling, and serial communication to a host display. The 12-channel 10-bit ADC reads pulse oximeter photodiode signals, pressure transducer outputs, and battery voltage, while the MSSP I2C link interfaces with an external precision ADC or a Bluetooth transceiver. The 2 KB RAM supports a small ring buffer for streaming pulse waveform data, and the NanoWatt sleep modes extend battery life in portable monitoring devices.
موصى به
Security and Keypad Access Systems
Access control panels, alarm keypads, and RFID readers deploy the PIC18F85J10-I/PT to scan matrix keypads, drive buzzers and LEDs, and authenticate users against the on-board EEPROM or an external I2C EEPROM. The two USARTs interface with an RFID reader module and a GSM/4G backhaul modem, while the MSSP I2C port connects to a real-time clock and an external EEPROM for credential storage. With 1024 bytes of internal EEPROM plus access to external storage, designers can store thousands of user credentials, and the 32 KB Flash supports encrypted authentication algorithms and audit logging. Watchdog timer and NanoWatt sleep modes ensure field reliability.
موصى به
General-Purpose Multi-Serial Embedded Boards
Development boards, multi-serial protocol converters, and educational kits use the PIC18F85J10-I/PT because its four serial ports and 80-pin TQFP footprint provide maximum peripheral density for prototyping. Engineers can simultaneously test I2C sensor interfacing, SPI flash access, UART bridges, and LIN communication on the same MCU. The 10 MIPS performance is adequate for protocol conversion between Modbus RTU, I2C, SPI, and CAN-like UART bridges. The 32 KB Flash supports real-time operating system kernels or open-source Arduino-like frameworks, and the 80-pin TQFP remains breadboardable via breakout adapters for hobbyist projects.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18F85J10-I/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18F85J10T-I/PT | PIC18F86J10-I/PT | PIC18F87J10-I/PT | PIC18F8722-I/PT | PIC18F85J15-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-80 (12x12 mm) | TQFP-80 (12x12 mm) - same | TQFP-80 (12x12 mm) - same | TQFP-80 (12x12 mm) - same | TQFP-80 (12x12 mm) - same | TQFP-80 (12x12 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 96 KB | 128 KB | 128 KB | 48 KB |
| SRAM | 2 KB | 2 KB | 3.8 KB | 3.8 KB | 3.8 KB | 2 KB |
| EEPROM | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes |
| Maximum CPU Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Supply Voltage | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 4.2V to 5.5V | 2.0V to 3.6V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Serial Ports | 2x MSSP + 2x EUSART (LIN-capable) | 2x MSSP + 2x EUSART (LIN-capable) | 2x MSSP + 2x EUSART (LIN-capable) | 2x MSSP + 2x EUSART (LIN-capable) | 1x MSSP + 2x EUSART | 2x MSSP + 2x EUSART (LIN-capable) |
| ADC | 10-bit, up to 12 channels | 10-bit, up to 12 channels | 10-bit, up to 12 channels | 10-bit, up to 12 channels | 10-bit, up to 16 channels | 10-bit, up to 12 channels |
أبرز الفروقات
- Four concurrent serial ports in 80-pin TQFP (مقابلPIC18F8722-I/PT)
- NanoWatt technology for low-power sleep modes (مقابلPIC18F8722-I/PT)
- Direct code migration path to 96 KB / 128 KB Flash variants (مقابلPIC18F85J10T-I/PT)
- 2.0V-3.6V wide supply supports battery applications (مقابلPIC18F8722-I/PT)
ملاحظات التصميم
The PIC18F85J10-I/PT has seven VDD/VSS pin pairs distributed across the 80-pin TQFP. Place a 100 nF decoupling capacitor within 3 mm of each VDD pin and a single 10 uF bulk tantalum or ceramic capacitor near the package. The J-series operates at 2.0V to 3.6V only - DO NOT connect to 5V rails, as the Flash programming voltage and I/O buffers are 3.6V absolute maximum. For applications migrating from a 5V design, add a 3.3V LDO such as MCP1700 upstream.
At maximum 40 MHz clock with all peripherals active, the PIC18F85J10-I/PT consumes approximately 30 mA. Estimated: at 3.3V x 0.03 A = 0.099 W power dissipation. The TQFP-80 package has theta_JA of approximately 50 C/W on a 4-layer JEDEC test board, yielding a 5C junction temperature rise above ambient at full load. Even at -40C industrial minimum, the junction stays well below the 150C maximum, so no heatsinking is required.
Route the ICSP pins RB6/PGC and RB7/PGD to a 6-pin header with at least 100 mil pitch for in-circuit programming and debugging. Keep the trace length under 50 mm to avoid signal integrity issues with the ICSP clock. The MCLR pin should be pulled up to VDD through a 10 kohm resistor, with a 100 nF capacitor to ground if long MCLR traces are routed near noisy signals. Avoid placing the 80-pin TQFP over noisy digital traces; keep analog ADC inputs separated from switching power or PWM outputs.
When migrating code from PIC18F8722 to PIC18F85J10, watch for the supply voltage change (5V to 3.3V) and ADC reference defaults. The J-series ADC defaults to VDD/VSS references, while the legacy F-series uses separate VREF+/VREF- pins. Also enable the peripheral pin-select unlock sequence before remapping digital peripherals - forgetting this sequence locks the configuration. Finally, set the CONFIG3L register's IESO bit to control two-speed oscillator startup if a slow crystal is used.
معلومات الامتثال
RoHS compliant per Microchip product page. The /PT suffix denotes lead-free TQFP packaging. Not AEC-Q100 qualified - for automotive applications use PIC18F85J10-E/PT (-40C to +125C extended grade) in the same footprint.