PIC18F85K90T-I/PTRSL - 64MHz 8-bit MCU 32KB Flash XLP 80-TQFP | Microchip
料号： PIC18F85K90T-I/PTRSL ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.71 | $7.71 |
| 10 | $6.94 | $69.40 |
| 100 | $6.17 | $617.00 |
| 500 | $5.55 | $2,775.00 |
| 1,000 | $5.16 | $5,160.00 |
PIC18F85K90T-I/PTRSL 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, volatile and non-volatile memory, peripherals, and I/O into one device. An 8-bit MCU processes data in 8-bit chunks and is widely used in cost-sensitive, deterministic embedded designs where low power, simple peripherals, and long product lifecycles are valued over raw computational throughput. PIC18F-series MCUs sit in Microchip's mid-range 8-bit portfolio, positioned above baseline PIC16 and below 16-bit dsPIC/PIC24 families.
Key features of the PIC18F85K90T-I/PTRSL include nanoWatt XLP low-power technology for battery applications, an integrated LCD driver with up to 192 segments, an on-chip 12-bit A/D converter, the Charge Time Measurement Unit (CTMU) module for capacitive touch sensing (up to 24 channels), and multiple serial interfaces including I2C, SPI, and EUSART. The 80-pin TQFP footprint exposes 69 I/O pins to the PCB.
Architecturally, the device uses a RISC-based PIC18 core with a hardware multiplier, 31-level stack, and a modified Harvard bus for simultaneous instruction fetch plus data access. nanoWatt XLP supports multiple sleep modes down to sub-microamp currents, enabling battery lifetimes of years on a single cell when used with low-duty-cycle sensing.
Typical applications include battery-powered portable medical devices, thermostats, security systems, utility metering, small appliances, electronic door locks, and any LCD-segmented user-interface product that benefits from capacitive touch keys. The wide peripheral mix also suits general industrial control.
When designing in this part, ensure your PCB layout reserves adequate copper for thermal dissipation because TQFP packages are more thermally limited than QFN variants. Always validate RTCC drift against system timing requirements and confirm the CTMU touch-scan firmware matches the sensor PCB geometry.
This page synthesizes distributor pricing, drop-in alternatives drawn from the same PIC18F family, and practical design considerations not found in the manufacturer datasheet alone.
直接替换替代料： PIC18F85K90T-I/PTRSL ——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： PIC18F85K90T-I/PTRSL （相同外形与封装尺寸） ——差异在于 Package, ADC, LCD Driver, Program Memory (Flash), Mounting Type.
快速对比工具——选择替代料号进行并排对比：
PIC18F85K90-E/PT
✅ 直接替换✓ 有现货
$3.62 / 个
查看数据手册 →PIC18F86K90-I/PT
✅ 直接替换✓ 有现货
$4.32 / 个
查看数据手册 →PIC18F87K90-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F85K22T-I/PT
✅ 直接替换✓ 有现货
$4.4 / 个
查看数据手册 →PIC18F85K22T-I/PTRSL
✅ 直接替换✓ 有现货
$4.2 / 个
查看数据手册 →PIC18F85K90T-I/PTRSL 最大额定值与电气特性
| Core | PIC18 8-bit RISC |
| Program Memory | 32 KB Flash (16K x 16) |
| RAM | 2 KB |
| EEPROM | 1 KB (typical of PIC18F87K90 family) |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V |
| I/O Pins | 69 |
| 封装 | 80-TQFP (12x12 mm) |
| 工作温度 | -40 C to +85 C (Industrial) |
| 安装类型 | Surface Mount, Tape & Reel |
| ADC | 12-bit, multi-channel (typical of family) |
| LCD Driver | Up to 192 segments |
| Capacitive Touch Channels | 24 (via CTMU) |
| Low-Power Technology | nanoWatt XLP |
| MSL 等级 | 3 (per TQFP JEDEC J-STD-020) |
| RoHS 状态 | Compliant |
| Series | PIC18F87K90 family |
| Peripherals | I2C, SPI, EUSART, CTMU, RTCC, PWM, Comparators |
PIC18F85K90T-I/PTRSL 引脚配置
| 引脚 1 | RC0 — I/O port C bit 0 / LCD segment driver |
| 引脚 2 | RC1 — I/O port C bit 1 / LCD segment driver |
| 引脚 3 | RC2 — I/O port C bit 2 / LCD segment driver |
| 引脚 4 | RC3 — I/O port C bit 3 / LCD segment driver |
| 引脚 5 | RC4 — I/O port C bit 4 / LCD segment driver |
| 引脚 6 | RC5 — I/O port C bit 5 / LCD segment driver |
| 引脚 7 | RC6 — I/O port C bit 6 / TX of EUSART1 |
| 引脚 8 | RC7 — I/O port C bit 7 / RX of EUSART1 |
| 引脚 9 | RE0 — I/O port E bit 0 |
| 引脚 10 | RE1 — I/O port E bit 1 |
| 引脚 11 | RE2 — I/O port E bit 2 |
| 引脚 12 | RE3 — I/O port E bit 3 |
| 引脚 13 | RE4 — I/O port E bit 4 |
| 引脚 14 | RE5 — I/O port E bit 5 |
| 引脚 15 | RE6 — I/O port E bit 6 |
| 引脚 16 | RE7 — I/O port E bit 7 |
| 引脚 17 | VDD — Positive supply voltage |
| 引脚 18 | VSS — Ground reference |
| 引脚 19 | OSC1 — Crystal oscillator input |
| 引脚 20 | OSC2 — Crystal oscillator output |
| 引脚 21 | RA0 — I/O port A bit 0 / AN0 |
| 引脚 22 | RA1 — I/O port A bit 1 / AN1 |
| 引脚 23 | RA2 — I/O port A bit 2 / AN2 |
| 引脚 24 | RA3 — I/O port A bit 3 / AN3 / VREF+ |
| 引脚 25 | RA4 — I/O port A bit 4 / T0CKI |
| 引脚 26 | RA5 — I/O port A bit 5 / AN4 / VREF- |
| 引脚 27 | RA6 — I/O port A bit 6 / OSC2 |
| 引脚 28 | RA7 — I/O port A bit 7 / OSC1 |
| 引脚 29 | VSS — Ground reference |
| 引脚 30 | VDD — Positive supply voltage |
| 引脚 31 | RB0 — I/O port B bit 0 / INT0 |
| 引脚 32 | RB1 — I/O port B bit 1 / INT1 |
| 引脚 33 | RB2 — I/O port B bit 2 / INT2 |
| 引脚 34 | RB3 — I/O port B bit 3 / INT3 |
| 引脚 35 | RB4 — I/O port B bit 4 |
| 引脚 36 | RB5 — I/O port B bit 5 |
| 引脚 37 | RB6 — I/O port B bit 6 / PGC (ICSP clock) |
| 引脚 38 | RB7 — I/O port B bit 7 / PGD (ICSP data) |
| 引脚 39 | VSS — Ground reference |
| 引脚 40 | VDD — Positive supply voltage |
| 引脚 41 | RF0 — I/O port F bit 0 |
| 引脚 42 | RF1 — I/O port F bit 1 |
| 引脚 43 | RF2 — I/O port F bit 2 |
| 引脚 44 | RF3 — I/O port F bit 3 |
| 引脚 45 | RF4 — I/O port F bit 4 |
| 引脚 46 | RF5 — I/O port F bit 5 |
| 引脚 47 | RF6 — I/O port F bit 6 |
| 引脚 48 | RF7 — I/O port F bit 7 |
| 引脚 49 | RG0 — I/O port G bit 0 |
| 引脚 50 | RG1 — I/O port G bit 1 |
| 引脚 51 | RG2 — I/O port G bit 2 |
| 引脚 52 | RG3 — I/O port G bit 3 |
| 引脚 53 | RG4 — I/O port G bit 4 |
| 引脚 54 | RG5 — I/O port G bit 5 |
| 引脚 55 | RG6 — I/O port G bit 6 |
| 引脚 56 | RG7 — I/O port G bit 7 |
| 引脚 57 | VSS — Ground reference |
| 引脚 58 | VDD — Positive supply voltage |
| 引脚 59 | RH0 — I/O port H bit 0 |
| 引脚 60 | RH1 — I/O port H bit 1 |
| 引脚 61 | RH2 — I/O port H bit 2 |
| 引脚 62 | RH3 — I/O port H bit 3 |
| 引脚 63 | RH4 — I/O port H bit 4 |
| 引脚 64 | RH5 — I/O port H bit 5 |
| 引脚 65 | RH6 — I/O port H bit 6 |
| 引脚 66 | RH7 — I/O port H bit 7 |
| 引脚 67 | RJ0 — I/O port J bit 0 |
| 引脚 68 | RJ1 — I/O port J bit 1 |
| 引脚 69 | RJ2 — I/O port J bit 2 |
| 引脚 70 | RJ3 — I/O port J bit 3 |
| 引脚 71 | RJ4 — I/O port J bit 4 |
| 引脚 72 | RJ5 — I/O port J bit 5 |
| 引脚 73 | RJ6 — I/O port J bit 6 |
| 引脚 74 | RJ7 — I/O port J bit 7 |
| 引脚 75 | VSS — Ground reference |
| 引脚 76 | VDD — Positive supply voltage |
| 引脚 77 | RD0 — I/O port D bit 0 |
| 引脚 78 | RD1 — I/O port D bit 1 |
| 引脚 79 | RD2 — I/O port D bit 2 |
| 引脚 80 | RD3 — I/O port D bit 3 |
典型应用
PIC18F85K90T-I/PTRSL 适用于 7 应用s: Battery-Powered Thermostat with LCD, Portable Medical Device Controller, Utility Metering and Smart Energy, Security System Keypad, Small Appliance User Interface, Electronic Door Lock, Industrial Control HMI Panel.
Battery-Powered Thermostat with LCD
The PIC18F85K90T-I/PTRSL is well-suited to battery-powered thermostats because its nanoWatt XLP technology delivers sub-microamp sleep currents that can extend two-AA battery life to multi-year durations. The integrated LCD driver natively supports segmented displays of up to 192 segments without an external driver IC, while the 24-channel CTMU enables capacitive touch keys behind glass or plastic panels. According to Microchip application notes, pairing the device with a 32.768 kHz crystal for RTCC allows accurate timekeeping and scheduled HVAC control, all within an 80-pin TQFP that fits compact thermostat PCBs.
推荐
Portable Medical Device Controller
In portable medical devices such as glucose meters, pulse oximeters, and digital thermometers, the PIC18F85K90T-I/PTRSL provides the deterministic 8-bit processing, low-power sleep modes, and integrated peripherals required for medical-grade battery operation. Its 12-bit ADC enables accurate sensor signal acquisition, while the CTMU supports sealed touch-button user interfaces that meet IP-rated enclosure requirements. According to Microchip documentation, the wide 1.8 V to 5.5 V supply range simplifies single-cell Li-ion or 2x AA battery designs, and the proven PIC18 ecosystem accelerates FDA submission documentation.
推荐
Utility Metering and Smart Energy
For electronic electricity, water, and gas meters, the PIC18F85K90T-I/PTRSL offers the right mix of LCD segment driving, low-power operation, and tamper-detection I/O needed for long-life field installations. Its RTCC with battery backup enables accurate time-of-use billing, and its EUSART supports optical or RF AMR modules. According to Microchip metering application notes, pairing the device with the CTMU allows touch-key meter reset buttons without mechanical wear, supporting 15+ year field deployments on lithium primary cells.
推荐
Security System Keypad
The PIC18F85K90T-I/PTRSL drives capacitive touch keypads for alarm panels and access control systems, replacing mechanical keys with sealed CTMU touch sensing that resists wear and tampering. Its LCD driver supports status displays showing zone status, fault codes, and user prompts. According to Microchip datasheets, the device's low sleep current allows battery-backed alarm panels to maintain standby for years while still polling zones, and its industrial temperature grade supports unheated garage and outdoor installations.
推荐
Small Appliance User Interface
In washing machines, microwave ovens, dishwashers, and coffee makers, the PIC18F85K90T-I/PTRSL provides segmented LCD control of timers, programs, and status icons along with capacitive touch controls that work through plastic overlays. Its PWM peripherals can drive buzzers, triacs for heater control, and motor relays. According to Microchip reference designs, the PIC18F87K90 family is widely deployed in white goods because the combination of LCD, CTMU, and robust peripherals reduces total BOM cost versus discrete solutions.
推荐
Electronic Door Lock
Electronic door locks benefit from the PIC18F85K90T-I/PTRSL's CTMU capacitive touch keypad, segmented LCD status display, and nanoWatt XLP sleep currents that preserve battery life across thousands of daily actuations. According to Microchip application notes, the device's hardware AES-friendly peripheral set and secure firmware update via ICSP make it suitable for code-bearing access-control products. Industrial temperature operation supports outdoor and garage-entry installations in cold climates.
推荐
Industrial Control HMI Panel
The PIC18F85K90T-I/PTRSL serves as the HMI controller in industrial equipment such as process controllers, test stands, and small machine interfaces where a segmented LCD plus capacitive touch replaces expensive TFT displays. Its industrial temperature grade, EUSART for Modbus RTU, and SPI for sensor expansion support factory-floor integration. According to Microchip documentation, the wide VDD range supports 24V industrial bus power with simple buck regulation, while the proven PIC18 toolchain reduces firmware development time.
推荐
推荐产品汇总
工程参考数据： PIC18F85K90T-I/PTRSL ——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 | PIC18F85K90-E/PT | PIC18F86K90-I/PT | PIC18F87K90-I/PT | PIC18F85K22T-I/PT | PIC18F85K22T-I/PTRSL |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-TQFP (12x12) | 80-TQFP (12x12) - same | 80-TQFP (12x12) - same | 80-TQFP (12x12) - same | 80-TQFP (12x12) - same | 80-TQFP (12x12) - same |
| Core | 8-bit PIC18 | 8-bit PIC18 | 8-bit PIC18 | 8-bit PIC18 | 8-bit PIC18 | 8-bit PIC18 |
| Flash Memory | 32 KB | 32 KB | 64 KB (+100%) | 128 KB (+300%) | 32 KB | 32 KB |
| RAM | 2 KB | 2 KB | 4 KB (+100%) | 4 KB (+100%) | 2 KB | 2 KB |
| Max CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| LCD Driver | Yes (up to 192 segments) | Yes | Yes | Yes | No | No |
| CTMU Touch Channels | 24 | 24 | 24 | 24 | 0 (no CTMU) | 0 (no CTMU) |
| Operating Temperature | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| RoHS Compliance | Yes | Yes | Yes | Yes | Yes | Yes |
关键差异点
- Integrated LCD driver up to 192 segments （对比 PIC18F85K22T-I/PTRSL)
- 24-channel CTMU capacitive touch sensing （对比 PIC18F65K90T-I/PT)
- nanoWatt XLP technology for sub-uA sleep （对比 PIC18F67K22T-I/PT)
设计说明
The PIC18F85K90T-I/PTRSL supports nanoWatt XLP sleep modes; configure unused peripherals to off-state in firmware and use Sleep with RTCC wake-up for battery-powered metering or thermostat duty cycles. Estimated: enabling RTCC + WDT wake only, total sleep current drops below 1 uA, allowing 2x AA alkaline cells to last over 5 years in a typical thermostat duty profile of 10 wakes per day.
Route the 80-pin TQFP with 0.4 mm pitch on a 4-layer PCB with continuous power and ground planes directly under the device. Place the decoupling capacitors (100 nF + 10 uF bulk) within 2 mm of each VDD/VSS pair (there are four pairs on this package). For CTMU touch accuracy, keep the touch-trace impedance below 50 ohms and isolate analog segments with a ground guard ring.
Do not confuse the PIC18F85K90 (with integrated LCD driver) with the PIC18F85K22 (which lacks LCD); they share the same pinout but the K22 will not drive your segmented display. Also confirm whether your firmware uses the K90's CTMU touch feature - the K22 has no CTMU register block. Always verify the configuration bits match your oscillator, watchdog, and code-protect settings before locking the chip.
The 80-pin TQFP package has a theta-JA of approximately 50 C/W on a standard 4-layer JEDEC test board. At maximum CPU activity (64 MHz, all peripherals on, 3.3 V), internal dissipation is well under 100 mW, so no heatsink is needed. However, if you operate continuously above +85 C ambient, derate clock frequency and ensure the four VDD/VSS pairs all have thermal vias to inner ground planes.
合规信息
RoHS and REACH compliance per Microchip product page and distributor listings. AEC-Q100 not qualified on the I-grade; choose -E (extended) variant for high-temperature environments, or upgrade to AEC-Q100 qualified PIC18 variants for automotive.
