PIC18F66J94T-I/MR - 64KB Flash 8-bit MCU USB/LCD | Microchip
料号： PIC18F66J94T-I/MR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.62 | $7.62 |
| 10 | $6.85 | $68.50 |
| 100 | $5.94 | $594.00 |
| 500 | $5.32 | $2,660.00 |
| 1,000 | $4.78 | $4,780.00 |
| 3,000 | $4.21 | $12,630.00 |
PIC18F66J94T-I/MR 概述
A microcontroller (MCU) is a single-chip computer containing a CPU, memory (Flash for program, SRAM for data), and programmable peripherals. PIC18F series devices use Microchip's enhanced 8-bit RISC architecture with a 16-bit instruction word and Harvard bus structure. This family specifically targets low-power applications via nanoWatt XLP technology and integrates segmented LCD drivers (up to 256 segments), USB 2.0 Full-Speed, and analog peripherals, replacing multiple discrete components in cost-sensitive designs.
Key features of the PIC18F66J94T-I/MR include 64KB of self-programmable Flash, 4KB SRAM, integrated USB 2.0 Full-Speed transceiver with on-chip PHY, a segmented LCD controller supporting up to 256 segments, 16 MIPS throughput at 64MHz, and nanoWatt XLP power management with multiple low-power sleep modes drawing microamp-level current. The 64-pin VFQFN exposed-pad package provides low thermal resistance and compact PCB footprint for space-constrained designs.
The device integrates a 10-bit ADC, multiple capture/compare/PWM modules, I2C, SPI, UART, and the USB Full-Speed transceiver with internal 3.3V regulator. Real-Time Clock/Calendar with dedicated low-power oscillator and charge time measurement unit enable battery-powered metering designs. The architecture supports self-programming for in-field firmware updates.
Typical applications include USB-connected human-interface devices, electronic point-of-sale terminals with LCD displays, portable medical instrumentation, industrial data loggers, automotive dashboard clusters, and consumer white goods with segment LCD interfaces. The combination of USB, LCD, and low-power features makes this MCU a strong fit for any battery-powered product requiring both USB connectivity and a multi-segment user display.
When designing with this part, ensure the exposed pad is soldered to a sufficient copper area on the PCB for thermal dissipation. The internal 3.3V regulator must be bypassed with the manufacturer-recommended capacitor values per the datasheet's electrical characteristics section to ensure USB PHY compliance.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the standalone manufacturer datasheet.
直接替换替代料： PIC18F66J94T-I/MR ——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： PIC18F66J94T-I/MR （相同外形与封装尺寸） ——差异在于 Package, ADC, LCD Driver, Maximum Clock Speed, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
PIC18F65J94-I/MR
✅ 直接替换✓ 有现货
$3.4 / 个
查看数据手册 →PIC18F65K90-I/MR
✅ 直接替换✓ 有现货
$3.02 / 个
查看数据手册 →PIC18F65K90-E/MR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.6 / 个
查看数据手册 →PIC18F65K90T-I/MR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.95 / 个
查看数据手册 →PIC18F65K22-E/MR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.5 / 个
查看数据手册 →PIC18F66J94T-I/MR 最大额定值与电气特性
| Core Architecture | PIC 8-bit RISC (enhanced) |
| Series | PIC18FxxJ94 (XLP family) |
| Program Memory (Flash) | 64 KB (32K x 16) |
| RAM | 4 KB |
| Operating Frequency | 64 MHz (max, 16 MIPS) |
| 电源电压 | 3.3 V (2.0 V to 3.6 V) |
| 工作温度 | -40 C to +85 C (industrial, -I) |
| 封装 | 64-pin VFQFN exposed pad (MR), 9x9 mm |
| 安装类型 | Surface Mount |
| USB | USB 2.0 Full-Speed with on-chip PHY |
| LCD Driver | Segment LCD up to 256 segments |
| ADC | 10-bit A/D converter |
| Low-Power Technology | nanoWatt XLP |
| Self-Programming | Yes (Flash self-programming) |
| Internal Voltage Regulator | Yes (3.3V LDO for core) |
| RoHS 状态 | Compliant |
| Packaging Form | Tape and Reel (T suffix) |
PIC18F66J94T-I/MR 64-pin vfqfn exposed pad (mr), 9x9 mm 引脚配置指南
PIC18F66J94T-I/MR（64-pin vfqfn exposed pad (mr), 9x9 mm 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： PIC18F66J94T-I/MR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PIC18F66J94T-I/MR 适用于 6 应用s: USB Human Interface Devices (HID), Segment LCD Metering and Instrumentation, Portable Medical Devices, Industrial Data Loggers and Sensors, Point-of-Sale (POS) Terminals, Consumer Appliance User Interfaces.
USB Human Interface Devices (HID)
The PIC18F66J94T-I/MR's integrated USB 2.0 Full-Speed transceiver with on-chip PHY makes it a strong fit for USB HID-class devices such as keyboards, mice, game controllers, and custom input peripherals. The 64KB Flash accommodates USB HID stacks plus application code, while 4KB RAM supports HID report buffers and protocol handling. With nanoWatt XLP technology, suspend current drops to microamp levels for USB bus-powered compliance. Placed on a compact PCB leveraging the 9x9mm VFQFN footprint, designers can build slim peripherals without an external USB PHY. Trade-off: full-speed only (12 Mbps), so applications needing high-speed USB require an external ULPI PHY.
推荐
Segment LCD Metering and Instrumentation
The PIC18F66J94T-I/MR drives up to 256 LCD segments directly, eliminating external driver ICs in multi-function metering designs such as digital multimeters, industrial gauges, and HVAC controllers. The 64KB Flash supports full segmented LCD libraries and calibration routines, while 4KB RAM handles conversion buffers and averaging. Its nanoWatt XLP modes enable multi-year battery operation when paired with the on-chip RTC. Compared to a discrete LCD driver plus MCU solution, this integration reduces BOM cost and PCB area. The trade-off is fixed maximum 256 segments; for larger displays, consider the PIC18F87J94 family with up to 480 segments in a larger package.
推荐
Portable Medical Devices
Portable medical devices such as glucose meters, pulse oximeters, and handheld diagnostic tools benefit from the PIC18F66J94T-I/MR's combination of low-power nanoWatt XLP modes, integrated USB for data transfer, and segment LCD for readout. The 64KB Flash supports medical algorithms and UI code, while 4KB RAM handles waveform buffers. Operating from a 3.3V battery with microamp-level sleep current extends operational life between charges. Industrial -40C to +85C temperature range supports use in clinical and home environments. Trade-off: no hardware AES/DES, so cryptographic applications need firmware-based security libraries.
推荐
Industrial Data Loggers and Sensors
The PIC18F66J94T-I/MR is well suited for industrial data loggers that record sensor measurements to internal Flash and periodically expose data via USB. Its 10-bit ADC captures analog sensor data, while 64KB Flash stores both firmware and logged datasets (firmware scaling required). nanoWatt XLP technology keeps quiescent current low for battery-powered remote installations, and the RTC with dedicated low-power oscillator enables accurate timestamping. The wide -40C to +85C industrial temperature range tolerates factory floor and outdoor environments. Compared to larger ARM Cortex-M0 MCUs, this part offers a lower-cost path with simpler development toolchain for 8-bit applications.
推荐
Point-of-Sale (POS) Terminals
Electronic point-of-sale terminals and payment peripherals benefit from the PIC18F66J94T-I/MR's USB interface for transaction communication and its integrated segment LCD for amount display, receipt summaries, or customer-facing prompts. The 64KB Flash accommodates USB stack plus payment protocol code, while 4KB RAM handles transaction buffers. The 3.3V supply with on-chip regulator simplifies power tree design in compact POS enclosures. Industrial temperature tolerance supports deployment in varied retail environments. Trade-off: integrated USB is Full-Speed only, so high-bandwidth peripherals may need an external PHY.
推荐
Consumer Appliance User Interfaces
Consumer appliances such as washing machines, microwave ovens, and white goods incorporate segment LCD displays for time, temperature, and status indication - a natural fit for the PIC18F66J94T-I/MR's integrated LCD driver. Its USB interface supports factory programming and field firmware updates, while nanoWatt XLP modes reduce standby power for energy-star compliance. 64KB Flash stores the UI state machine and motor-control handshake code, and 4KB RAM handles button-debounce and display refresh buffers. Compared to discrete LCD driver solutions, this integration shrinks BOM cost. The 64-pin VFQFN exposed pad provides low thermal resistance for sustained MCU activity.
推荐
推荐产品汇总
工程参考数据： PIC18F66J94T-I/MR ——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 | PIC18F65J94-I/MR | PIC18F65K90-I/MR | PIC18F65K90-E/MR | PIC18F65K22-E/MR |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin VFQFN (MR) 9x9 mm | 64-pin VFQFN (MR) 9x9 mm | 64-pin VFQFN (MR) 9x9 mm | 64-pin VFQFN (MR) 9x9 mm | 64-pin VFQFN (MR) 9x9 mm |
| Flash Memory | 64 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| RAM | 4 KB | 4 KB | 2 KB | 2 KB | 2 KB |
| Integrated USB | USB 2.0 Full-Speed with on-chip PHY | USB 2.0 Full-Speed with on-chip PHY | No | No | No |
| Segment LCD Driver | Up to 256 segments | Up to 256 segments | No | No | No |
| Low-Power Technology | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP |
| Maximum Frequency | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) |
关键差异点
- Integrated USB 2.0 Full-Speed with on-chip PHY plus 256-segment LCD driver in single 64-pin VFQFN （对比 PIC18F65K90-I/MR)
- Largest Flash in the 64-pin VFQFN (MR) PIC18J94 family sub-tier （对比 PIC18F65J94-I/MR)
- nanoWatt XLP technology with on-chip RTC for multi-year battery operation （对比 PIC18F65K22-E/MR)
设计说明
The 64-pin VFQFN (MR) package has an exposed thermal pad on the underside that MUST be soldered to a PCB thermal land for proper heat dissipation and electrical grounding. Recommended land pattern: minimum 6x6 mm thermal pad with 0.5 mm pitch vias (4-8 vias) connecting to internal ground planes. Inadequate soldering of the exposed pad can cause intermittent operation, especially at 64 MHz clock rates with elevated ambient temperatures.
The PIC18F66J94T-I/MR includes an internal 3.3V LDO that derives the core logic supply from the I/O supply. Place the manufacturer-recommended bulk and decoupling capacitors (typically 10uF + 0.1uF) on the VDDCORE pin to ensure stable regulator operation. For USB applications, the internal 3.3V USB regulator has separate decoupling requirements - refer to the datasheet's USB section. Operating the part with the internal regulator disabled requires an external 3.3V supply tied to VDDCORE.
Do not confuse the 64-pin VFQFN (MR) with the 64-pin TQFP (PT) package - they are not pin-compatible. The MR package has different pin assignments and lacks through-hole leads. Also note: the 'J' in PIC18F66J94 denotes 3.3V-only operation; the 'K' series (e.g., PIC18F65K90) operates from a wider voltage range but lacks the integrated USB PHY. Verify the firmware's USB stack and LCD library compatibility before substituting K-series for J-series.
For USB Full-Speed operation, route the D+ and D- traces as a 90-ohm differential pair with matched lengths. Keep the traces short and away from noise sources such as switching regulators. The on-chip USB PHY requires a precise 48 MHz clock derived from the system oscillator via the PLL - configure the PLL settings per datasheet recommendations. Add common-mode choke or ESD array for enhanced robustness in industrial environments.
合规信息
RoHS and REACH compliance per Microchip environmental documentation. Industrial temperature grade (-I) for -40C to +85C; no AEC-Q100 automotive grade exists for this part. Pb-free (lead-free) termination compatible with SAC305 reflow profiles.
