PIC18F85J90-I/PT - 8-bit 40MHz 32KB Flash LCD MCU 80-TQFP | Microchip
料号： PIC18F85J90-I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.2 | $7.20 |
| 10 | $6.45 | $64.50 |
| 100 | $5.65 | $565.00 |
| 500 | $5.05 | $2,525.00 |
| 1,000 | $4.5 | $4,500.00 |
PIC18F85J90-I/PT 概述
An 8-bit PIC microcontroller is a RISC (Reduced Instruction Set Computer) device optimized for embedded control, providing deterministic interrupt latency and a rich peripheral set in compact packages. Within Microchip's hierarchy, the PIC18F family sits above the PIC16F baseline and below the PIC24/dsPIC 16-bit families, balancing code density, peripheral integration, and cost for human-machine interface (HMI) and metering applications. The PIC18F85J90 family specifically targets applications requiring an integrated segmented LCD driver, eliminating the need for an external LCD controller.
Key features include an integrated LCD driver supporting up to 192 segments, nanoWatt Technology for power-managed sleep modes, an analog-to-digital converter (ADC), and multiple communication peripherals including I2C, SPI, and USART. The device uses a 16-bit instruction word architecture (24-bit Flash) with internal RC oscillator options, making it well suited for battery-backed designs.
The PIC18F85J90 architecture employs a Harvard bus structure with separate program and data paths, enabling single-cycle instruction execution and predictable timing. The on-chip LCD charge pump supports contrast generation even when VDD is below the LCD threshold voltage, simplifying handheld meter designs that operate from a single cell.
Typical applications include handheld utility meters (gas, water, electric), home security control panels, thermostats and HVAC interfaces, medical instrumentation displays, and industrial HMI panels. The integrated LCD driver makes the PIC18F85J90 particularly compelling when a segmented glass display is required alongside digital logic.
When designing with this device, allocate sufficient PCB real estate for the 80-pin TQFP footprint (12x12 mm with 0.5 mm pitch) and ensure programming/debug interface access (PGC/PGD/PGM pins) is routed to an ICSP header. For low-power applications, leverage the nanoWatt idle/sleep modes and select the internal 31 kHz oscillator to minimize current draw below 1 uA in deep sleep.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives from the same Microchip PIC18 family, and practical design notes not found in the standalone manufacturer datasheet to accelerate component selection for embedded LCD designs.
直接替换替代料： PIC18F85J90-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： PIC18F85J90-I/PT （相同外形与封装尺寸） ——差异在于 Operating Temperature, Package, Program Memory (Flash), I/O Pins, ADC.
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 →PIC18F85J50-I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.8 / 个
查看数据手册 →PIC18F85J11-I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.76 / 个
查看数据手册 →PIC18F8585-I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$11.05 / 个
查看数据手册 →PIC18F8490-I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.55 / 个
查看数据手册 →PIC18F84J90T-I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.4 / 个
查看数据手册 →PIC18F85J90-I/PT 最大额定值与电气特性
| Core Architecture | PIC18 8-bit RISC |
| Program Memory (Flash) | 32 KB (16K x 16 words) |
| RAM | 2 KB (2048 bytes) |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 67 (max) |
| LCD Segments Supported | Up to 192 segments |
| ADC | 10-bit, multi-channel |
| Communication Peripherals | I2C, SPI, USART (A/E/I enhanced) |
| Timers | Multiple 8-bit and 16-bit timers |
| 封装 | 80-pin TQFP (PT), 12x12 mm, 1 mm height |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C (Industrial) |
| Power-Saving Modes | nanoWatt Technology (Idle, Sleep, Deep Sleep) |
| RoHS 状态 | Compliant |
| MSL 等级 | 3 (168 hours) |
| ICSP Programming | Yes (PGC/PGD/PGM pins) |
PIC18F85J90-I/PT 引脚配置
| 引脚 1 | RG0/SEG29 — I/O port RG0 / LCD segment 29 |
| 引脚 2 | RG1/SEG30 — I/O port RG1 / LCD segment 30 |
| 引脚 3 | RG2/SEG31 — I/O port RG2 / LCD segment 31 |
| 引脚 4 | RG3/SEG32 — I/O port RG3 / LCD segment 32 |
| 引脚 5 | RG4/SEG41 — I/O port RG4 / LCD segment 41 |
| 引脚 6 | MCLR — Master Clear (reset) input |
| 引脚 7 | OSC1/CLKI — Crystal oscillator input / external clock |
| 引脚 8 | OSC2/CLKO — Crystal oscillator output |
| 引脚 9 | RA0/AN0 — I/O port RA0 / ADC input 0 |
| 引脚 10 | RA1/AN1 — I/O port RA1 / ADC input 1 |
| 引脚 11 | RA2/AN2 — I/O port RA2 / ADC input 2 |
| 引脚 12 | RA3/AN3 — I/O port RA3 / ADC input 3 |
| 引脚 13 | RA4/AN4 — I/O port RA4 / ADC input 4 |
| 引脚 14 | RA5/AN5 — I/O port RA5 / ADC input 5 |
| 引脚 15 | RA6 — I/O port RA6 |
| 引脚 16 | RA7 — I/O port RA7 |
| 引脚 17 | VSS — Ground reference |
| 引脚 18 | VDD — Positive supply voltage |
| 引脚 19 | RB0/INT0 — I/O port RB0 / external interrupt 0 |
| 引脚 20 | RB1/INT1 — I/O port RB1 / external interrupt 1 |
| 引脚 21 | RB2/INT2 — I/O port RB2 / external interrupt 2 |
| 引脚 22 | RB3/INT3 — I/O port RB3 / external interrupt 3 |
| 引脚 23 | RB4 — I/O port RB4 |
| 引脚 24 | RB5 — I/O port RB5 |
| 引脚 25 | RB6/PGC — I/O port RB6 / ICSP clock |
| 引脚 26 | RB7/PGD — I/O port RB7 / ICSP data |
| 引脚 27 | RC0 — I/O port RC0 |
| 引脚 28 | RC1 — I/O port RC1 |
| 引脚 29 | RC2 — I/O port RC2 |
| 引脚 30 | RC3 — I/O port RC3 |
| 引脚 31 | RC4 — I/O port RC4 |
| 引脚 32 | RC5 — I/O port RC5 |
| 引脚 33 | RC6 — I/O port RC6 |
| 引脚 34 | RC7 — I/O port RC7 |
| 引脚 35 | VSS — Ground reference |
| 引脚 36 | VDD — Positive supply voltage |
| 引脚 37 | RD0 — I/O port RD0 |
| 引脚 38 | RD1 — I/O port RD1 |
| 引脚 39 | RD2 — I/O port RD2 |
| 引脚 40 | RD3 — I/O port RD3 |
| 引脚 41 | RD4 — I/O port RD4 |
| 引脚 42 | RD5 — I/O port RD5 |
| 引脚 43 | RD6 — I/O port RD6 |
| 引脚 44 | RD7 — I/O port RD7 |
| 引脚 45 | VSS — Ground reference |
| 引脚 46 | VDD — Positive supply voltage |
| 引脚 47 | RE0 — I/O port RE0 |
| 引脚 48 | RE1 — I/O port RE1 |
| 引脚 49 | RE2 — I/O port RE2 |
| 引脚 50 | RE3 — I/O port RE3 |
| 引脚 51 | RE4 — I/O port RE4 |
| 引脚 52 | RE5 — I/O port RE5 |
| 引脚 53 | RE6 — I/O port RE6 |
| 引脚 54 | RE7 — I/O port RE7 |
| 引脚 55 | RF0 — I/O port RF0 |
| 引脚 56 | RF1/AN6 — I/O port RF1 / ADC input 6 |
| 引脚 57 | RF2/AN7 — I/O port RF2 / ADC input 7 |
| 引脚 58 | RF3/AN8 — I/O port RF3 / ADC input 8 |
| 引脚 59 | RF4/AN9 — I/O port RF4 / ADC input 9 |
| 引脚 60 | RF5/AN10 — I/O port RF5 / ADC input 10 |
| 引脚 61 | RF6/AN11 — I/O port RF6 / ADC input 11 |
| 引脚 62 | RF7 — I/O port RF7 |
| 引脚 63 | VSS — Ground reference |
| 引脚 64 | VDD — Positive supply voltage |
| 引脚 65 | RH0/SEG12 — I/O port RH0 / LCD segment 12 |
| 引脚 66 | RH1/SEG13 — I/O port RH1 / LCD segment 13 |
| 引脚 67 | RH2/SEG14 — I/O port RH2 / LCD segment 14 |
| 引脚 68 | RH3/SEG15 — I/O port RH3 / LCD segment 15 |
| 引脚 69 | RH4/SEG16 — I/O port RH4 / LCD segment 16 |
| 引脚 70 | RH5/SEG17 — I/O port RH5 / LCD segment 17 |
| 引脚 71 | RH6/SEG18 — I/O port RH6 / LCD segment 18 |
| 引脚 72 | RH7/SEG19 — I/O port RH7 / LCD segment 19 |
| 引脚 73 | RJ0 — I/O port RJ0 |
| 引脚 74 | RJ1 — I/O port RJ1 |
| 引脚 75 | RJ2 — I/O port RJ2 |
| 引脚 76 | RJ3 — I/O port RJ3 |
| 引脚 77 | RJ4 — I/O port RJ4 |
| 引脚 78 | RJ5 — I/O port RJ5 |
| 引脚 79 | RJ6 — I/O port RJ6 |
| 引脚 80 | RJ7 — I/O port RJ7 |
典型应用
PIC18F85J90-I/PT 适用于 6 应用s: Handheld Utility Meters (Gas / Water / Electric), Home Security Control Panels with LCD Keypad, Thermostats and HVAC User Interfaces, Medical Instrumentation Displays, Industrial HMI Panels and Operator Interfaces, Point-of-Sale Terminals and Kitchen Display Controllers.
Handheld Utility Meters (Gas / Water / Electric)
The PIC18F85J90-I/PT's integrated LCD driver supporting up to 192 segments and nanoWatt power-saving modes make it ideal for battery-powered handheld utility meters. The on-chip charge pump generates LCD bias voltages from a single 3V cell, while deep-sleep current below 100 nA extends battery life beyond 10 years in metering duty cycles. The 32 KB Flash accommodates metering firmware with tamper detection, calibration constants, and segmented LCD rendering, all within a compact 80-pin TQFP.
推荐
Home Security Control Panels with LCD Keypad
Security panels benefit from the PIC18F85J90-I/PT's combination of 67 I/O pins for keypad scanning, zone inputs, and siren drivers, plus the LCD segment driver for status displays showing armed state, zone faults, and event logs. The 40 MHz / 10 MIPS throughput handles keypad debouncing, communication with wireless sensors, and real-time LCD refresh without latency. Wide 2.0V-5.5V supply tolerance enables direct operation from backup battery stacks during AC loss.
推荐
Thermostats and HVAC User Interfaces
Thermostat designs leverage the PIC18F85J90-I/PT's LCD segment driver for backlit temperature displays and the ADC for thermistor sensing, while nanoWatt sleep modes preserve battery life during idle periods. The 8-bit PIC18 core executes scheduling logic, PID control loops, and weekly programming menus within the 32 KB Flash budget. Industrial -40C to +85C temperature range supports both indoor wall-mounted units and outdoor equipment installations without derating.
推荐
Medical Instrumentation Displays
Medical devices such as portable glucose meters, blood pressure monitors, and infusion pumps use the PIC18F85J90-I/PT for its LCD driver plus low-power modes critical for battery operation. The 10-bit ADC digitizes sensor inputs with adequate resolution for clinical readings, and the 8-bit RISC core executes measurement algorithms within deterministic timing. The wide 2.0V-5.5V supply range supports both lithium primary cells and rechargeable battery chemistries used in medical handhelds.
推荐
Industrial HMI Panels and Operator Interfaces
Industrial HMI panels benefit from the PIC18F85J90-I/PT's 67 I/O pins for button matrices, encoder inputs, relay outputs, and the integrated LCD driver for status display. Communication peripherals (USART, SPI, I2C) interface to sensor networks and host controllers, while the 40 MHz CPU ensures responsive panel behavior. The industrial temperature range -40C to +85C and robust 80-pin TQFP package support factory-floor deployment with stable operation.
推荐
Point-of-Sale Terminals and Kitchen Display Controllers
Point-of-sale and food-service display terminals use the PIC18F85J90-I/PT for the LCD segment driver showing order status, prices, and totals. The I2C/SPI interfaces connect to receipt printers and card readers, while USART links to back-office inventory systems. With 32 KB Flash and 2 KB RAM, the device supports menu navigation logic and small transaction queues in compact 80-pin TQFP designs, suitable for tight PCB constraints in countertop equipment.
推荐
推荐产品汇总
工程参考数据： PIC18F85J90-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 | PIC18F85J50-I/PT | PIC18F85J11-I/PT | PIC18F8490-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-pin TQFP (PT) 12x12 mm | 80-pin TQFP (PT) - same | 80-pin TQFP (PT) - same | 80-pin TQFP (PT) - same | 80-pin TQFP (PT) - same |
| Flash Memory | 32 KB | 64 KB (+100%) | 32 KB (same) | 32 KB (same) | 16 KB (-50%) |
| RAM | 2 KB | 2 KB (same) | 2 KB (same) | 2 KB (same) | 1 KB (-50%) |
| Integrated LCD Driver | Yes (192 segments) | Yes (192 segments) | No (USB instead) | No | Yes (192 segments) |
| USB Support | No | No | Yes (USB 2.0 FS) | No | No |
| Supply Voltage Range | 2.0V to 5.5V | 2.0V to 5.5V (same) | 2.0V to 5.5V (same) | 2.0V to 5.5V (same) | 2.0V to 5.5V (same) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) |
| Approx. Unit Price (qty 100) | $5.65 | $6.50 (est., higher Flash) | $6.20 (est., USB variant) | $5.40 (est., no LCD) | $5.10 (est., lower Flash) |
关键差异点
- Integrated 192-segment LCD driver eliminates external LCD controller （对比 PIC18F85J11-I/PT)
- Doubled Flash memory in same package for code growth headroom （对比 PIC18F86J90-I/PT)
- nanoWatt Technology with multiple sleep modes for battery designs （对比 PIC18F6722-I/PT)
设计说明
Leverage the nanoWatt Technology sleep modes (Sleep, Idle, Deep Sleep) to minimize current consumption in battery-backed meter applications. Selecting the internal 31 kHz LFINTOSC as the system clock during sleep can reduce total current below 100 nA in Deep Sleep with RTCC and LCD enabled. Always configure the LCD charge pump voltage (VLCD) before entering sleep so the display retains contrast during low-power states, and use the on-chip Real-Time Clock Calendar (RTCC) with a 32.768 kHz crystal to maintain timekeeping while the core sleeps.
For the 80-pin TQFP (12x12 mm body, 0.5 mm pitch), allocate generous copper pours under the device for thermal dissipation and place all VDD/VSS pairs (pins 17/18, 35/36, 45/46, 63/64) with 100 nF decoupling capacitors placed within 3 mm of each pair. Route ICSP signals (PGC/PGD/MCLR) to a 6-pin header with no series resistors, since ICSP requires direct drive; keep the trace length under 50 mm to avoid programming failures.
Do not confuse the J90 family pinout with the K90 or earlier F-series PIC18 80-pin variants - while many pins share functions, the LCD segment assignments differ between families. Always confirm the exact pinout from the Microchip datasheet DS39770C before laying out a PCB. Another common mistake is failing to enable the LCD module's bias and waveform configuration registers before expecting display output; the LCD will remain blank if the LCDCON, LCDPS, and LCDSE registers are not initialized correctly during firmware startup.
合规信息
RoHS compliant per Microchip product page. Halogen-free status not explicitly stated in verified data; confirm via Microchip material declaration if required.