PIC18F85K90T-I/PTRSL - 64MHz 8-bit MCU 32KB Flash XLP 80-TQFP | Microchip
MPN: PIC18F85K90T-I/PTRSL ✓ Hoạt độngPIC18F85K90T-I/PTRSL Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC18F85K90T-I/PTRSL — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18F85K90T-I/PTRSL (cùng hình factor và footprint) — khác nhau ở Package, ADC, LCD Driver, Program Memory (Flash), Mounting Type.
PIC18F85K90-E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F86K90-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F87K90-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F85K22T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F85K22T-I/PTRSL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F85K90T-I/PTRSL Tỷ lệ tối đa & tính chất điện
| 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 |
| Hộp | 80-TQFP (12x12 mm) |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Kiểu lắp đặt | 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 |
| Cấp MSL | 3 (per TQFP JEDEC J-STD-020) |
| Trạng thái RoHS | Compliant |
| Series | PIC18F87K90 family |
| Peripherals | I2C, SPI, EUSART, CTMU, RTCC, PWM, Comparators |
Cấu hình chân PIC18F85K90T-I/PTRSL
| Chân 1 | RC0 — I/O port C bit 0 / LCD segment driver |
| Chân 2 | RC1 — I/O port C bit 1 / LCD segment driver |
| Chân 3 | RC2 — I/O port C bit 2 / LCD segment driver |
| Chân 4 | RC3 — I/O port C bit 3 / LCD segment driver |
| Chân 5 | RC4 — I/O port C bit 4 / LCD segment driver |
| Chân 6 | RC5 — I/O port C bit 5 / LCD segment driver |
| Chân 7 | RC6 — I/O port C bit 6 / TX of EUSART1 |
| Chân 8 | RC7 — I/O port C bit 7 / RX of EUSART1 |
| Chân 9 | RE0 — I/O port E bit 0 |
| Chân 10 | RE1 — I/O port E bit 1 |
| Chân 11 | RE2 — I/O port E bit 2 |
| Chân 12 | RE3 — I/O port E bit 3 |
| Chân 13 | RE4 — I/O port E bit 4 |
| Chân 14 | RE5 — I/O port E bit 5 |
| Chân 15 | RE6 — I/O port E bit 6 |
| Chân 16 | RE7 — I/O port E bit 7 |
| Chân 17 | VDD — Positive supply voltage |
| Chân 18 | VSS — Ground reference |
| Chân 19 | OSC1 — Crystal oscillator input |
| Chân 20 | OSC2 — Crystal oscillator output |
| Chân 21 | RA0 — I/O port A bit 0 / AN0 |
| Chân 22 | RA1 — I/O port A bit 1 / AN1 |
| Chân 23 | RA2 — I/O port A bit 2 / AN2 |
| Chân 24 | RA3 — I/O port A bit 3 / AN3 / VREF+ |
| Chân 25 | RA4 — I/O port A bit 4 / T0CKI |
| Chân 26 | RA5 — I/O port A bit 5 / AN4 / VREF- |
| Chân 27 | RA6 — I/O port A bit 6 / OSC2 |
| Chân 28 | RA7 — I/O port A bit 7 / OSC1 |
| Chân 29 | VSS — Ground reference |
| Chân 30 | VDD — Positive supply voltage |
| Chân 31 | RB0 — I/O port B bit 0 / INT0 |
| Chân 32 | RB1 — I/O port B bit 1 / INT1 |
| Chân 33 | RB2 — I/O port B bit 2 / INT2 |
| Chân 34 | RB3 — I/O port B bit 3 / INT3 |
| Chân 35 | RB4 — I/O port B bit 4 |
| Chân 36 | RB5 — I/O port B bit 5 |
| Chân 37 | RB6 — I/O port B bit 6 / PGC (ICSP clock) |
| Chân 38 | RB7 — I/O port B bit 7 / PGD (ICSP data) |
| Chân 39 | VSS — Ground reference |
| Chân 40 | VDD — Positive supply voltage |
| Chân 41 | RF0 — I/O port F bit 0 |
| Chân 42 | RF1 — I/O port F bit 1 |
| Chân 43 | RF2 — I/O port F bit 2 |
| Chân 44 | RF3 — I/O port F bit 3 |
| Chân 45 | RF4 — I/O port F bit 4 |
| Chân 46 | RF5 — I/O port F bit 5 |
| Chân 47 | RF6 — I/O port F bit 6 |
| Chân 48 | RF7 — I/O port F bit 7 |
| Chân 49 | RG0 — I/O port G bit 0 |
| Chân 50 | RG1 — I/O port G bit 1 |
| Chân 51 | RG2 — I/O port G bit 2 |
| Chân 52 | RG3 — I/O port G bit 3 |
| Chân 53 | RG4 — I/O port G bit 4 |
| Chân 54 | RG5 — I/O port G bit 5 |
| Chân 55 | RG6 — I/O port G bit 6 |
| Chân 56 | RG7 — I/O port G bit 7 |
| Chân 57 | VSS — Ground reference |
| Chân 58 | VDD — Positive supply voltage |
| Chân 59 | RH0 — I/O port H bit 0 |
| Chân 60 | RH1 — I/O port H bit 1 |
| Chân 61 | RH2 — I/O port H bit 2 |
| Chân 62 | RH3 — I/O port H bit 3 |
| Chân 63 | RH4 — I/O port H bit 4 |
| Chân 64 | RH5 — I/O port H bit 5 |
| Chân 65 | RH6 — I/O port H bit 6 |
| Chân 66 | RH7 — I/O port H bit 7 |
| Chân 67 | RJ0 — I/O port J bit 0 |
| Chân 68 | RJ1 — I/O port J bit 1 |
| Chân 69 | RJ2 — I/O port J bit 2 |
| Chân 70 | RJ3 — I/O port J bit 3 |
| Chân 71 | RJ4 — I/O port J bit 4 |
| Chân 72 | RJ5 — I/O port J bit 5 |
| Chân 73 | RJ6 — I/O port J bit 6 |
| Chân 74 | RJ7 — I/O port J bit 7 |
| Chân 75 | VSS — Ground reference |
| Chân 76 | VDD — Positive supply voltage |
| Chân 77 | RD0 — I/O port D bit 0 |
| Chân 78 | RD1 — I/O port D bit 1 |
| Chân 79 | RD2 — I/O port D bit 2 |
| Chân 80 | RD3 — I/O port D bit 3 |
Ứng dụng tiêu biểu
PIC18F85K90T-I/PTRSL phù hợp cho 7 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F85K90T-I/PTRSL — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Integrated LCD driver up to 192 segments (vsPIC18F85K22T-I/PTRSL)
- 24-channel CTMU capacitive touch sensing (vsPIC18F65K90T-I/PT)
- nanoWatt XLP technology for sub-uA sleep (vsPIC18F67K22T-I/PT)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
