PIC18F87J90-I/PT - 128KB Flash LCD MCU 80-TQFP | Microchip
料号： PIC18F87J90-I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.65 | $9.65 |
| 10 | $8.95 | $89.50 |
| 100 | $7.85 | $785.00 |
| 500 | $6.95 | $3,475.00 |
| 1,000 | $6.1 | $6,100.00 |
PIC18F87J90-I/PT 概述
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.
直接替换替代料： PIC18F87J90-I/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18F87J90-I/PT （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, ADC, Core Architecture, I/O Pins.
快速对比工具——选择替代料号进行并排对比：
PIC18F86J90-I/PT
✅ 直接替换✓ 有现货
$2.86 / 个
查看数据手册 →PIC18F85J90-I/PT
✅ 直接替换✓ 有现货
$4.5 / 个
查看数据手册 →PIC18F87J72-I/PT
✅ 直接替换✓ 有现货
$4.78 / 个
查看数据手册 →PIC18F86J65-I/PT
✅ 直接替换✓ 有现货
$5.8 / 个
查看数据手册 →PIC18F87J10-I/PT
✅ 直接替换✓ 有现货
$5.1 / 个
查看数据手册 →PIC18F87J90-I/PT 最大额定值与电气特性
| 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 |
| 工作温度 | -40C to +85C (industrial) |
| 封装 | 80-pin TQFP (12 x 12 mm, 1 mm height) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| MSL 等级 | 3 (168 hours) |
| nanoWatt Power Management | Yes (deep sleep / idle / Run modes) |
PIC18F87J90-I/PT 引脚配置
| 引脚 1 | RB0/INT0/SEG0 — I/O port RB0 / external interrupt / LCD segment 0 |
| 引脚 2 | RB1/INT1/SEG1 — I/O port RB1 / external interrupt / LCD segment 1 |
| 引脚 3 | RB2/INT2/SEG2 — I/O port RB2 / external interrupt / LCD segment 2 |
| 引脚 4 | RB3/INT3/SEG3 — I/O port RB3 / external interrupt / LCD segment 3 |
| 引脚 5 | RB4/SEG4 — I/O port RB4 / LCD segment 4 |
| 引脚 6 | RB5/SEG5 — I/O port RB5 / LCD segment 5 |
| 引脚 7 | RB6/ICSPCLK/SEG6 — I/O port RB6 / ICSP clock / LCD segment 6 |
| 引脚 8 | RB7/ICSPDAT/SEG7 — I/O port RB7 / ICSP data / LCD segment 7 |
| 引脚 9 | VDD — Positive supply (2.0V - 3.6V) |
| 引脚 10 | VSS — Ground reference |
| 引脚 11 | RC0/SOSCO — I/O port RC0 / secondary oscillator output |
| 引脚 12 | RC1/SOSCI — I/O port RC1 / secondary oscillator input |
| 引脚 13 | RC2/CCP1 — I/O port RC2 / Capture/Compare/PWM 1 |
| 引脚 14 | RC3/SCL — I/O port RC3 / I2C clock |
| 引脚 15 | RC4/SDA — I/O port RC4 / I2C data |
| 引脚 16 | RC5/SEG8 — I/O port RC5 / LCD segment 8 |
| 引脚 17 | RC6/SEG9 — I/O port RC6 / LCD segment 9 |
| 引脚 18 | RC7/SEG10 — I/O port RC7 / LCD segment 10 |
| 引脚 19 | RD0/SEG11 — I/O port RD0 / LCD segment 11 |
| 引脚 20 | RD1/SEG12 — I/O port RD1 / LCD segment 12 |
| 引脚 21 | RD2/SEG13 — I/O port RD2 / LCD segment 13 |
| 引脚 22 | RD3/SEG14 — I/O port RD3 / LCD segment 14 |
| 引脚 23 | RD4/SEG15 — I/O port RD4 / LCD segment 15 |
| 引脚 24 | RD5/SEG16 — I/O port RD5 / LCD segment 16 |
| 引脚 25 | RD6/SEG17 — I/O port RD6 / LCD segment 17 |
| 引脚 26 | RD7/SEG18 — I/O port RD7 / LCD segment 18 |
| 引脚 27 | VSS — Ground reference |
| 引脚 28 | VDD — Positive supply (2.0V - 3.6V) |
| 引脚 29 | RE0/SEG19 — I/O port RE0 / LCD segment 19 |
| 引脚 30 | RE1/SEG20 — I/O port RE1 / LCD segment 20 |
| 引脚 31 | RE2/SEG21 — I/O port RE2 / LCD segment 21 |
| 引脚 32 | RE3/SEG22 — I/O port RE3 / LCD segment 22 |
| 引脚 33 | RE4/SEG23 — I/O port RE4 / LCD segment 23 |
| 引脚 34 | RE5/SEG24 — I/O port RE5 / LCD segment 24 |
| 引脚 35 | RE6/SEG25 — I/O port RE6 / LCD segment 25 |
| 引脚 36 | RE7/SEG26 — I/O port RE7 / LCD segment 26 |
| 引脚 37 | RF0/SEG27 — I/O port RF0 / LCD segment 27 |
| 引脚 38 | RF1/SEG28 — I/O port RF1 / LCD segment 28 |
| 引脚 39 | RF2/SEG29 — I/O port RF2 / LCD segment 29 |
| 引脚 40 | RF3/SEG30 — I/O port RF3 / LCD segment 30 |
| 引脚 41 | RF4/SEG31 — I/O port RF4 / LCD segment 31 |
| 引脚 42 | RF5/SEG32/COM0 — I/O port RF5 / LCD segment 32 / Common 0 |
| 引脚 43 | RF6/SEG33/COM1 — I/O port RF6 / LCD segment 33 / Common 1 |
| 引脚 44 | RF7/SEG34/COM2 — I/O port RF7 / LCD segment 34 / Common 2 |
| 引脚 45 | RG0/SEG35/COM3 — I/O port RG0 / LCD segment 35 / Common 3 |
| 引脚 46 | RG1/SEG36 — I/O port RG1 / LCD segment 36 |
| 引脚 47 | RG2/SEG37 — I/O port RG2 / LCD segment 37 |
| 引脚 48 | RG3/SEG38 — I/O port RG3 / LCD segment 38 |
| 引脚 49 | RG4/SEG39 — I/O port RG4 / LCD segment 39 |
| 引脚 50 | MCLR/RE5 — Master clear / reset (active-low) |
| 引脚 51 | RH0/SEG40 — I/O port RH0 / LCD segment 40 |
| 引脚 52 | RH1/SEG41 — I/O port RH1 / LCD segment 41 |
| 引脚 53 | RH2/SEG42 — I/O port RH2 / LCD segment 42 |
| 引脚 54 | RH3/SEG43 — I/O port RH3 / LCD segment 43 |
| 引脚 55 | RH4/SEG44 — I/O port RH4 / LCD segment 44 |
| 引脚 56 | RH5/SEG45 — I/O port RH5 / LCD segment 45 |
| 引脚 57 | RH6/SEG46 — I/O port RH6 / LCD segment 46 |
| 引脚 58 | RH7/SEG47 — I/O port RH7 / LCD segment 47 |
| 引脚 59 | RJ0/SEG48 — I/O port RJ0 / LCD segment 48 |
| 引脚 60 | RJ1/SEG49 — I/O port RJ1 / LCD segment 49 |
| 引脚 61 | RJ2/SEG50 — I/O port RJ2 / LCD segment 50 |
| 引脚 62 | RJ3/SEG51 — I/O port RJ3 / LCD segment 51 |
| 引脚 63 | RJ4/SEG52 — I/O port RJ4 / LCD segment 52 |
| 引脚 64 | VSS — Ground reference |
| 引脚 65 | VDD — Positive supply (2.0V - 3.6V) |
| 引脚 66 | RJ5/SEG53 — I/O port RJ5 / LCD segment 53 |
| 引脚 67 | RJ6/SEG54 — I/O port RJ6 / LCD segment 54 |
| 引脚 68 | RJ7/SEG55 — I/O port RJ7 / LCD segment 55 |
| 引脚 69 | RK0/SEG56 — I/O port RK0 / LCD segment 56 |
| 引脚 70 | RK1/SEG57 — I/O port RK1 / LCD segment 57 |
| 引脚 71 | RK2/SEG58 — I/O port RK2 / LCD segment 58 |
| 引脚 72 | RK3/SEG59 — I/O port RK3 / LCD segment 59 |
| 引脚 73 | RK4/AN16 — I/O port RK4 / analog input 16 |
| 引脚 74 | RK5/AN17 — I/O port RK5 / analog input 17 |
| 引脚 75 | RK6/AN18 — I/O port RK6 / analog input 18 |
| 引脚 76 | RK7/AN19 — I/O port RK7 / analog input 19 |
| 引脚 77 | RA0/AN0 — I/O port RA0 / analog input 0 |
| 引脚 78 | RA1/AN1 — I/O port RA1 / analog input 1 |
| 引脚 79 | RA2/AN2 — I/O port RA2 / analog input 2 |
| 引脚 80 | RA3/AN3 — I/O port RA3 / analog input 3 |
典型应用
PIC18F87J90-I/PT 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： PIC18F87J90-I/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Large Flash with full segment-LCD （对比 PIC18F85J90-I/PT)
- Drop-in 80-TQFP footprint across the J90 family （对比 PIC18F67J90-I/PT)
- Higher code density than PIC18F86J65 Ethernet variant （对比 PIC18F86J65-I/PT)
设计说明
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.
合规信息
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.
