PIC18F87J90-I/PT - 128KB Flash LCD MCU 80-TQFP | Microchip
MPN: PIC18F87J90-I/PT ✓ فعالPIC18F87J90-I/PT نمای کلی
An 8-bit microcontroller (MCU) is a self-contained computer-on-a-chip that integrates a CPU, program memory (Flash), data memory (RAM), and peripherals onto a single die; the PIC18F family is Microchip's high-performance tier targeting applications that need large code space, low power, and rich I/O. This device sits in the LCD-driver sub-family, adding dedicated segment-drive waveforms to drive character and segment glass directly, eliminating external LCD controller ICs in metering and appliance products.
The MCU integrates up-to-12 MIPS performance, an internal 31 kHz to 8 MHz oscillator selectable via software, a 10-bit ADC with up to 12 channels, multiple USART/CCP/SPI/I2C peripherals, and nanoWatt power-management modes for battery-operated designs. Wide 2.0-3.6V operation (the J-series 3V rail) supports single-cell Li-ion or two-AA batteries with low quiescent current under sleep.
The PIC18F87J90 architecture uses a 16-bit instruction word optimized for C compilers, with separate instruction and data buses enabling single-cycle execution; the segment-LCD module supports up to 192 segments with software-controllable contrast, charge-pump, and blinking functions.
Typical applications include handheld meters, thermostats, home security panels, portable medical devices, utility metering, and display-driven consumer appliances that combine computation with low-power segmented LCD readouts.
When designing with this part, allocate I/O pins carefully: 70 user I/O + dedicated LCD segments share the 80-pin TQFP. Use Microchip's MPLAB X IDE + XC8 compiler + MPLAB Snap (ICSP) for development and in-circuit debugging.
This page synthesizes distributor pricing, drop-in alternatives drawn from the same Microchip PIC18F8xJ90/8xJ60 family, and practical design notes not found in the manufacturer datasheet alone.
جایگزین‌های drop-in برای PIC18F87J90-I/PT — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC18F87J90-I/PT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Operating Temperature, ADC, Core Architecture, I/O Pins.
PIC18F86J90-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F85J90-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F87J72-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F86J65-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F87J10-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F87J90-I/PT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core Architecture | PIC18 (8-bit C-optimized RISC) |
| Program Memory (Flash) | 128 KB (64K x 16) |
| Data Memory (RAM) | 4 KB |
| Maximum CPU Speed | 48 MHz oscillator / 12 MIPS |
| Supply Voltage Range | 2.0 V to 3.6 V |
| I/O Pins | 70 |
| ADC | 10-bit, multiple channels |
| LCD Driver | Integrated segment LCD controller (up to 192 segments) |
| Communication | USART, SPI, I2C (MSSP), EUSART |
| Internal Oscillator | 31 kHz - 8 MHz selectable |
| دمای کاری | -40C to +85C (industrial) |
| بسته‌بندی | 80-pin TQFP (12 x 12 mm, 1 mm height) |
| نوع نصب | Surface Mount |
| وضعیت RoHS | Compliant |
| سطح MSL | 3 (168 hours) |
| nanoWatt Power Management | Yes (deep sleep / idle / Run modes) |
پیکربندی پین PIC18F87J90-I/PT
| پین 1 | RB0/INT0/SEG0 — I/O port RB0 / external interrupt / LCD segment 0 |
| پین 2 | RB1/INT1/SEG1 — I/O port RB1 / external interrupt / LCD segment 1 |
| پین 3 | RB2/INT2/SEG2 — I/O port RB2 / external interrupt / LCD segment 2 |
| پین 4 | RB3/INT3/SEG3 — I/O port RB3 / external interrupt / LCD segment 3 |
| پین 5 | RB4/SEG4 — I/O port RB4 / LCD segment 4 |
| پین 6 | RB5/SEG5 — I/O port RB5 / LCD segment 5 |
| پین 7 | RB6/ICSPCLK/SEG6 — I/O port RB6 / ICSP clock / LCD segment 6 |
| پین 8 | RB7/ICSPDAT/SEG7 — I/O port RB7 / ICSP data / LCD segment 7 |
| پین 9 | VDD — Positive supply (2.0V - 3.6V) |
| پین 10 | VSS — Ground reference |
| پین 11 | RC0/SOSCO — I/O port RC0 / secondary oscillator output |
| پین 12 | RC1/SOSCI — I/O port RC1 / secondary oscillator input |
| پین 13 | RC2/CCP1 — I/O port RC2 / Capture/Compare/PWM 1 |
| پین 14 | RC3/SCL — I/O port RC3 / I2C clock |
| پین 15 | RC4/SDA — I/O port RC4 / I2C data |
| پین 16 | RC5/SEG8 — I/O port RC5 / LCD segment 8 |
| پین 17 | RC6/SEG9 — I/O port RC6 / LCD segment 9 |
| پین 18 | RC7/SEG10 — I/O port RC7 / LCD segment 10 |
| پین 19 | RD0/SEG11 — I/O port RD0 / LCD segment 11 |
| پین 20 | RD1/SEG12 — I/O port RD1 / LCD segment 12 |
| پین 21 | RD2/SEG13 — I/O port RD2 / LCD segment 13 |
| پین 22 | RD3/SEG14 — I/O port RD3 / LCD segment 14 |
| پین 23 | RD4/SEG15 — I/O port RD4 / LCD segment 15 |
| پین 24 | RD5/SEG16 — I/O port RD5 / LCD segment 16 |
| پین 25 | RD6/SEG17 — I/O port RD6 / LCD segment 17 |
| پین 26 | RD7/SEG18 — I/O port RD7 / LCD segment 18 |
| پین 27 | VSS — Ground reference |
| پین 28 | VDD — Positive supply (2.0V - 3.6V) |
| پین 29 | RE0/SEG19 — I/O port RE0 / LCD segment 19 |
| پین 30 | RE1/SEG20 — I/O port RE1 / LCD segment 20 |
| پین 31 | RE2/SEG21 — I/O port RE2 / LCD segment 21 |
| پین 32 | RE3/SEG22 — I/O port RE3 / LCD segment 22 |
| پین 33 | RE4/SEG23 — I/O port RE4 / LCD segment 23 |
| پین 34 | RE5/SEG24 — I/O port RE5 / LCD segment 24 |
| پین 35 | RE6/SEG25 — I/O port RE6 / LCD segment 25 |
| پین 36 | RE7/SEG26 — I/O port RE7 / LCD segment 26 |
| پین 37 | RF0/SEG27 — I/O port RF0 / LCD segment 27 |
| پین 38 | RF1/SEG28 — I/O port RF1 / LCD segment 28 |
| پین 39 | RF2/SEG29 — I/O port RF2 / LCD segment 29 |
| پین 40 | RF3/SEG30 — I/O port RF3 / LCD segment 30 |
| پین 41 | RF4/SEG31 — I/O port RF4 / LCD segment 31 |
| پین 42 | RF5/SEG32/COM0 — I/O port RF5 / LCD segment 32 / Common 0 |
| پین 43 | RF6/SEG33/COM1 — I/O port RF6 / LCD segment 33 / Common 1 |
| پین 44 | RF7/SEG34/COM2 — I/O port RF7 / LCD segment 34 / Common 2 |
| پین 45 | RG0/SEG35/COM3 — I/O port RG0 / LCD segment 35 / Common 3 |
| پین 46 | RG1/SEG36 — I/O port RG1 / LCD segment 36 |
| پین 47 | RG2/SEG37 — I/O port RG2 / LCD segment 37 |
| پین 48 | RG3/SEG38 — I/O port RG3 / LCD segment 38 |
| پین 49 | RG4/SEG39 — I/O port RG4 / LCD segment 39 |
| پین 50 | MCLR/RE5 — Master clear / reset (active-low) |
| پین 51 | RH0/SEG40 — I/O port RH0 / LCD segment 40 |
| پین 52 | RH1/SEG41 — I/O port RH1 / LCD segment 41 |
| پین 53 | RH2/SEG42 — I/O port RH2 / LCD segment 42 |
| پین 54 | RH3/SEG43 — I/O port RH3 / LCD segment 43 |
| پین 55 | RH4/SEG44 — I/O port RH4 / LCD segment 44 |
| پین 56 | RH5/SEG45 — I/O port RH5 / LCD segment 45 |
| پین 57 | RH6/SEG46 — I/O port RH6 / LCD segment 46 |
| پین 58 | RH7/SEG47 — I/O port RH7 / LCD segment 47 |
| پین 59 | RJ0/SEG48 — I/O port RJ0 / LCD segment 48 |
| پین 60 | RJ1/SEG49 — I/O port RJ1 / LCD segment 49 |
| پین 61 | RJ2/SEG50 — I/O port RJ2 / LCD segment 50 |
| پین 62 | RJ3/SEG51 — I/O port RJ3 / LCD segment 51 |
| پین 63 | RJ4/SEG52 — I/O port RJ4 / LCD segment 52 |
| پین 64 | VSS — Ground reference |
| پین 65 | VDD — Positive supply (2.0V - 3.6V) |
| پین 66 | RJ5/SEG53 — I/O port RJ5 / LCD segment 53 |
| پین 67 | RJ6/SEG54 — I/O port RJ6 / LCD segment 54 |
| پین 68 | RJ7/SEG55 — I/O port RJ7 / LCD segment 55 |
| پین 69 | RK0/SEG56 — I/O port RK0 / LCD segment 56 |
| پین 70 | RK1/SEG57 — I/O port RK1 / LCD segment 57 |
| پین 71 | RK2/SEG58 — I/O port RK2 / LCD segment 58 |
| پین 72 | RK3/SEG59 — I/O port RK3 / LCD segment 59 |
| پین 73 | RK4/AN16 — I/O port RK4 / analog input 16 |
| پین 74 | RK5/AN17 — I/O port RK5 / analog input 17 |
| پین 75 | RK6/AN18 — I/O port RK6 / analog input 18 |
| پین 76 | RK7/AN19 — I/O port RK7 / analog input 19 |
| پین 77 | RA0/AN0 — I/O port RA0 / analog input 0 |
| پین 78 | RA1/AN1 — I/O port RA1 / analog input 1 |
| پین 79 | RA2/AN2 — I/O port RA2 / analog input 2 |
| پین 80 | RA3/AN3 — I/O port RA3 / analog input 3 |
کاربردهای معمول
PIC18F87J90-I/PT مناسب است برای 6 کاربردs: Handheld Utility Meters, Programmable Thermostats, Home Security Panels, Portable Medical Devices, Industrial Counters and Timers, Appliance User Interfaces.
Handheld Utility Meters
The PIC18F87J90-I/PT fits handheld electricity/water/gas meters because its integrated segment LCD driver eliminates external controller ICs and drives up to 192 segments directly. The 128 KB Flash stores complex tariff tables and history logs, while the 4 KB RAM buffers accumulated measurements. Its 2.0V minimum supply enables direct operation from two AA cells and its nanoWatt sleep modes reach sub-uA idle current between meter reads. Place the MCU with its 31 kHz internal oscillator in sleep between measurements to extend battery life to >10 years. The 12 MIPS speed handles kHz-rate sensor sampling without dropping ADC events.
پیشنهادی
Programmable Thermostats
The PIC18F87J90-I/PT suits programmable thermostats with 7-day scheduling and on-glass segment displays because the integrated LCD driver reduces BOM cost and PCB area. The 12 MIPS throughput runs the user interface and PID loop in a single die, while the RTC with external 32 kHz crystal keeps wall-clock time accurately across temperature swings. The 70 user I/O pins provide ample headroom for keypad scanning, NTC thermistor inputs via the 10-bit ADC, and triac drive for HVAC relay control. Its extended temperature grade (-40C to +85C) operates reliably on the wall plate in unconditioned spaces.
پیشنهادی
Home Security Panels
The PIC18F87J90-I/PT anchors home-security keypads and panels needing LCD readout of zone status, alarm history, and user prompts. Its 128 KB Flash holds nested menu state machines and event-log code, while 4 KB RAM buffers display strings for the segment-LCD character set. The EUSART interfaces to RF modules like MRF89XA while MSSP (SPI) drives external EEPROM for encrypted credential storage. Integrated nanoWatt deep-sleep allows the keypad to idle on battery backup during AC power loss without flattening it within 24 hours.
پیشنهادی
Portable Medical Devices
The PIC18F87J90-I/PT is a fit for battery-powered medical peripherals such as glucose meters, pulse oximeters, and infusion-pump keypads where low noise, low power, and segmented display are essential. The integrated 10-bit ADC reads analog front-ends while the segment LCD drives the user-visible parameter readout. C-optimized RISC architecture (12 MIPS) lets the same MCU run measurement algorithms, keypad handling, and display refresh without a separate display IC. Its 2.0V minimum VDD enables direct lithium-battery operation throughout the entire discharge curve.
پیشنهادی
Industrial Counters and Timers
The PIC18F87J90-I/PT drives industrial counters, production-line timers, and scoreboard displays because it combines a high-pin-count MCU with a robust segment LCD driver and EUSART/MSSP comms. The 80-TQFP allows direct wiring to 7-segment digit arrays through BCD latches, while the EUSART talks to PLCs or remote displays via RS-485 transceivers. 128 KB Flash absorbs ladder-logic and recipe-storage code; 4 KB RAM holds the current run-time state. Hardware CCP modules deliver precise PWM-driven relay sequencing for batching operations.
پیشنهادی
Appliance User Interfaces
The PIC18F87J90-I/PT is used as the user-interface MCU in washing machines, ovens, and microwave displays where a character LCD plus keypad combine with sensor and motor control. Up to 70 GPIO drive the segmented glass plus button matrix and rotary encoder; a hardware CCP implements the buzzer tone; the ADC reads NTC temperature probes. 12 MIPS C performance keeps button debounce and display refresh well below interrupt load. nanoWatt modes save energy when the appliance is in standby.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18F87J90-I/PT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18F86J90-I/PT | PIC18F85J90-I/PT | PIC18F87J72-I/PT | PIC18F86J65-I/PT | PIC18F87J10-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-pin TQFP (12x12) | 80-pin TQFP (12x12) - same | 80-pin TQFP (12x12) - same | 80-pin TQFP (12x12) - same | 80-pin TQFP (12x12) - same | 80-pin TQFP (12x12) - same |
| Flash Memory | 128 KB | 96 KB | 64 KB | 128 KB | 96 KB | 128 KB |
| RAM | 4 KB | 3.9 KB | 3.9 KB | 4 KB | 3.9 KB | 4 KB |
| Max CPU Speed | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 41.7 MHz / 10 MIPS | 48 MHz / 12 MIPS |
| Supply Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
| Segment LCD Driver | Yes (up to 192 segments) | Yes (up to 192 segments) | Yes (up to 192 segments) | Yes (up to 192 segments) | Yes (up to 192 segments) | No LCD driver |
| Integrated Ethernet MAC | No | No | No | No | Yes (Ethernet MAC) | No |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 12-bit | 10-bit | 10-bit |
تفاوت‌های کلیدی
- Large Flash with full segment-LCD (در مقابلPIC18F85J90-I/PT)
- Drop-in 80-TQFP footprint across the J90 family (در مقابلPIC18F67J90-I/PT)
- Higher code density than PIC18F86J65 Ethernet variant (در مقابلPIC18F86J65-I/PT)
یادداشت‌های طراحی
The PIC18F87J90-I/PT must be powered from 2.0V to 3.6V (J-series 3V rail). Place a 100 nF decoupling capacitor within 5 mm of each VDD pin and a single 10 uF bulk capacitor at the package entry. The segment-LCD charge pump draws transient currents up to several mA in multiplex mode; bulk capacitance is critical to prevent VDD droop that resets the MCU under load.
The 80-pin TQFP (12x12 mm) package has theta_JA of approximately 45 C/W on a 4-layer JEDEC test board. Estimated: at 48 MHz / 3.3V with all peripherals active, the device draws 10-15 mA and dissipates around 50 mW, yielding a junction rise of only 2-3 C above ambient, so no heatsink is required. However, in sealed meter enclosures with no airflow, derate ambient temperature to 60 C maximum to keep Tj below 85 C.
Keep the ICSP clock (RB6/ICSPCLK) and ICSP data (RB7/ICSPDAT) traces short and well-spaced from switching signals to avoid programming failures; both pins share the LCD segment 6/7 outputs and must be accessible in production for in-circuit programming. Route the SOSC pins (RC0/RC1) symmetrically and guard them with a ground ring if a 32 kHz crystal is fitted, to prevent RTC jitter. Use a wide ground pour under the package to anchor the analog inputs AN0-AN3 against digital switching noise.
Do not exceed the absolute maximum VDD of 4.0 V or the device will suffer latch-up. The MCLR pin requires a 10 kohm pull-up to VDD; a floating MCLR causes spurious resets. Configure unused I/O as outputs (not inputs) to avoid spurious interrupts in noisy environments. The internal LVD (Low-Voltage Detect) trip level must be set above the brown-out voltage but below 2.0V to allow correct startup.
اطلاعات انطباق
RoHS and lead-free per Microchip product page; AEC-Q100 automotive grade not certified for this industrial-grade part. PIC18F87J90 product family is suitable for industrial and consumer metering products.
