PIC32MX664F128LT-I/BG - 80MHz 128KB Flash MCU with USB/Ethernet
MPN： PIC32MX664F128LT-I/BG ✓ 啟用中PIC32MX664F128LT-I/BG 概覽
A 32-bit microcontroller is a single-chip computer that integrates a CPU core, program Flash, data SRAM, and a peripheral set on one die. The PIC32 family uses the MIPS32 M4K core, which executes the MIPS instruction set with single-cycle multiply and hardware debug support. Compared with 8-bit and 16-bit MCUs, 32-bit devices offer higher code density, faster arithmetic, and larger address spaces - making them suitable for embedded connectivity stacks such as TCP/IP and USB. The PIC32MX664 specifically targets connected applications by integrating Ethernet and USB peripherals alongside general-purpose I/O.
Key features include 53 general-purpose I/O pins organized across multiple ports, five 16-bit timers/counters, two I2C and two SPI/I2S interfaces, two comparators, a 16-channel 10-bit ADC, and a 4-channel DMA engine that offloads memory-to-peripheral transfers. The internal 8 MHz and 32 kHz oscillators reduce BOM cost by eliminating external crystals in non-precision applications. The part supports in-circuit serial programming (ICSP) and JTAG debugging through the same pins.
Typical applications include industrial Ethernet nodes, USB peripherals and embedded hosts, graphical user interfaces with integrated TFT drivers, automotive infotainment subsystems, point-of-sale terminals, and home-automation gateways. The integrated Ethernet MAC with MII/RMII interfaces allows direct connection to a PHY without an external controller, while the USB Full-Speed controller can operate in either device or host mode with on-chip transceivers.
When designing with this device, ensure your PCB layout follows Microchip's TFBGA routing guidelines - the 0.8 mm pitch requires laser-via or microvia fanout for production-grade reliability. Decoupling capacitors must be placed as close as possible to every VDD/VSS pair, and the analog supply (AVDD) requires an additional LC filter. Developers typically use the MPLAB Harmony framework or MPLAB XC32 compiler for firmware development, with the PICkit or ICD debugger for in-circuit debug.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical PCB layout notes not collected on any single distributor page.
直接替換替代品，適用於 PIC32MX664F128LT-I/BG — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC32MX664F128LT-I/BG （相同外形與佔位） — 差異在於 ADC, Package, Timers, USB, DMA Channels.
PIC32MX764F128LT-I/BG
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX695F128LT-I/BG
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX675F128LT-I/BG
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX664F128LT-I/BG 最大額定值與電氣特性
| Core | MIPS32 M4K 32-bit RISC |
| Maximum CPU Clock | 80 MHz |
| Program Flash | 128 KB (128K x 8) |
| Data SRAM | 32 KB |
| Operating Voltage | 2.3 V to 3.6 V |
| I/O Pins | 53 |
| 封裝 | 121-TFBGA (10x10x1.2 mm) |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C (Industrial) |
| Ethernet MAC | 10/100 Mbit (MII/RMII) |
| USB | USB 2.0 Full-Speed (Device/Host/OTG) |
| DMA Channels | 4 |
| ADC | 1x 10-bit, 16-channel |
| Timers | 5 x 16-bit |
| I2C / SPI / UART | 2 / 2 / 6 |
| Comparators | 2 |
| Oscillator | Internal 8 MHz + 32 kHz |
| Programming/Debug | ICSP + JTAG (2-wire) |
| Lead-Free / RoHS | Yes / Compliant |
| MSL 等級 | 3 (168 hours) |
PIC32MX664F128LT-I/BG 腳位配置
| 腳位 A1 | OSC1/CLKI/RC13 — Oscillator crystal input or external clock input |
| 腳位 A2 | OSC2/CLKO/RC14 — Oscillator crystal output or clock output |
| 腳位 B1 | VDD — Supply voltage (2.3-3.6V) |
| 腳位 B2 | VSS — Ground reference |
| 腳位 C1 | MCLR — Master clear reset input |
| 腳位 C2 | AVDD — Analog supply voltage |
| 腳位 D1 | AVSS — Analog ground |
| 腳位 D2 | PGEC1 — ICSP clock / JTAG TMS |
| 腳位 E1 | PGED1 — ICSP data / JTAG TDI |
| 腳位 E2 | VBUS — USB VBUS detect |
| 腳位 F1 | D+ — USB D+ data line |
| 腳位 F2 | D- — USB D- data line |
| 腳位 G1 | VUSB — USB internal transceiver supply |
| 腳位 G2 | ERXD0/PMD0 — Ethernet RX data 0 / parallel data 0 |
| 腳位 H1 | ERXD1/PMD1 — Ethernet RX data 1 / parallel data 1 |
| 腳位 H2 | ETXEN/PMD8 — Ethernet TX enable / parallel data 8 |
| 腳位 J1 | ETXD0/PMD2 — Ethernet TX data 0 / parallel data 2 |
| 腳位 J2 | ETXD1/PMD3 — Ethernet TX data 1 / parallel data 3 |
| 腳位 K1 | ERXCLK/REFCLK — Ethernet RX clock / reference clock |
| 腳位 K2 | EMDC — Ethernet management data clock |
典型應用
PIC32MX664F128LT-I/BG 適用於 6 應用s: Industrial Ethernet Sensor Node, USB HID / CDC Peripheral Device, Home Automation Gateway, Automotive Infotainment Subnode, Point-of-Sale Terminal Controller, Medical Data Acquisition Gateway.
Industrial Ethernet Sensor Node
The PIC32MX664F128LT-I/BG is purpose-built for connected industrial nodes where Ethernet is mandatory. Its integrated 10/100 Mbit MAC with MII/RMII interfaces connects directly to an external PHY (such as Microchip's KSZ8061) without an external controller, and the 80 MHz MIPS32 M4K core delivers enough compute headroom for TCP/IP stacks like Microchip's MPLAB Harmony Net Config. The 32 KB SRAM accommodates multiple socket buffers plus DHCP/TLS scratch memory, while the 4-channel DMA offloads packet transfer from the CPU. Industrial temperature qualification (-40C to +85C) and 2.3-3.6 V operation tolerate 24 V industrial bus rails through a simple buck converter. Compared with a discrete MCU plus external Ethernet controller, this single-chip approach reduces BOM count by 4-5 components.
推薦
USB HID / CDC Peripheral Device
The integrated USB 2.0 Full-Speed controller with on-chip transceiver makes the PIC32MX664F128LT-I/BG ideal for USB peripherals such as HID devices, CDC serial converters, and custom vendor-class endpoints. The peripheral supports device, host, and OTG modes with internal pull-up/pull-down resistors, eliminating external analog components. The 16 KB USB endpoint RAM is sufficient for HID plus one CDC channel, and the DMA engine keeps bulk endpoint throughput close to the 12 Mbps Full-Speed ceiling without CPU stall. Pair the part with a USB Type-C configuration channel companion like the FUSB302 if a reversible Type-C receptacle is desired.
推薦
Home Automation Gateway
A connected home-automation hub typically combines Ethernet for WAN connectivity with USB for radio dongles (Zigbee, Z-Wave, BLE) and possibly Wi-Fi adapters. The PIC32MX664F128LT-I/BG handles Ethernet through its MAC and USB host through the same chip's USB OTG controller. With 128 KB Flash, the gateway firmware fits an MQTT client, a TLS lite stack, and a USB host class driver simultaneously. The 80 MHz core performs AES/SHA acceleration in software at acceptable throughput for sub-1 kHz telemetry rates. UARTs provide connectivity to legacy 433 MHz radios, while I2C connects local sensors.
推薦
Automotive Infotainment Subnode
Within an automotive infotainment system, the PIC32MX664F128LT-I/BG can serve as a sub-node controller for HMI panels, audio routing, or rear-seat entertainment displays. Its Ethernet MAC interfaces with BroadR-Reach or 100BASE-T1 PHYs for in-vehicle networking, while the USB host port connects to Apple CarPlay / Android Auto dongles. The MIPS32 M4K core runs an RTOS and graphical stacks simultaneously at 80 MHz. For designs requiring CAN bus, the pin-compatible PIC32MX764F128LT-I/BG drops in without PCB rework. Industrial temperature rating covers most cabin environments.
推薦
Point-of-Sale Terminal Controller
POS terminals need both USB device connectivity (for host terminals) and Ethernet (for transaction processing) in a single chip. The PIC32MX664F128LT-I/BG delivers both with a single part number, eliminating the multi-chip solutions typically seen in entry-level POS designs. The 32 KB SRAM fits a TLS lite stack for EMV transactions, while the 128 KB Flash stores the application firmware and cryptographic libraries. The 16-channel ADC supports battery monitoring and touchscreen interfaces, and the I2S interface feeds an external audio codec for transaction prompts.
推薦
Medical Data Acquisition Gateway
Medical gateways that aggregate data from bedside monitors, infusion pumps, or wearable sensors benefit from the PIC32MX664F128LT-I/BG's combination of Ethernet (HL7/HL7 FHIR data forwarding) and USB (for bedside device configuration). The 80 MHz MIPS core performs real-time DSP filtering on incoming physiological signals before compression, and the DMA engine handles continuous ADC streams without CPU intervention. The industrial temperature range accommodates typical hospital environments. For designs requiring higher reliability, the PIC32MX764F128LT-I/BG adds CAN for medical device networking.
推薦
推薦產品摘要
工程參考資料，適用於 PIC32MX664F128LT-I/BG — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC32MX764F128LT-I/BG | PIC32MX695F128LT-I/BG | PIC32MX675F128LT-I/BG |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 121-TFBGA (10x10) | 121-TFBGA (10x10) - same | 121-TFBGA (10x10) - same | 121-TFBGA (10x10) - same |
| CPU Core | MIPS32 M4K @ 80 MHz | MIPS32 M4K @ 80 MHz | MIPS32 M4K @ 80 MHz | MIPS32 M4K @ 80 MHz |
| Flash | 128 KB | 128 KB | 128 KB | 128 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB |
| Ethernet MAC | 10/100 Mbit | 10/100 Mbit | 10/100 Mbit | None |
| USB | USB 2.0 FS OTG | USB 2.0 FS OTG | None | USB 2.0 FS OTG |
| CAN | No | CAN 2.0b | No | No |
| DMA Channels | 4 | 4 | 4 | 4 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
主要差異化特點
- Single-chip Ethernet plus USB integration (對比PIC32MX575F512H-80I/PT)
- Drop-in upgrade path with CAN (對比PIC32MX675F128LT-I/BG)
- Mature firmware ecosystem with MPLAB Harmony (對比Generic Cortex-M3 alternatives)
設計說明
The 121-TFBGA package uses 0.8 mm ball pitch and requires a microvia or laser-drilled via fanout for production-grade reliability. Recommended 4-layer stackup: top signals, ground plane, power plane, bottom signals. All VDD/VSS pairs must have a 0.1 uF decoupling capacitor placed within 1 mm of each pair, and a single 10 uF bulk capacitor per power rail near the package. The analog supply (AVDD) requires an additional ferrite bead + 10 uF filter to isolate from digital VDD noise. USB differential pair (D+/D-) must be routed with 90-ohm differential impedance and length-matched within 150 mil.
At 80 MHz CPU clock and full peripheral utilization, the PIC32MX664F128LT-I/BG dissipates approximately 240 mW - well within the TFBGA package's thermal envelope (junction-to-ambient ~25 C/W on a 4-layer JEDEC test board). Estimated: 80 MHz x ~3 mA/MHz core current = ~240 mW at 3.3V. For sealed enclosures without airflow, derate the clock to 60 MHz if ambient exceeds 70C. The exposed pad must be soldered to a 5x5 mm copper pour with at least 8 thermal vias to the inner ground plane for proper heat dissipation.
Ethernet MII traces (ERXD[0:3], ETXD[0:3], ERXCLK, ETXEN, EMDC, EMDIO) must be length-matched within 25 mil and routed as 50-ohm single-ended controlled-impedance traces. Place the external PHY within 50 mm of the MCU and keep the MII bus away from switching power converters and clock generators. For RMII mode, route the 50 MHz reference clock as a 50-ohm controlled-impedance trace and avoid stubs. The USB differential pair (D+/D-) and Ethernet MII/RMII traces should not cross each other.
Do not leave the MCLR pin floating - it must be pulled to VDD through a 10 kOhm resistor with a 100 nF cap to VSS for noise immunity. The PGEC1/PGED2 programming pins are not 5V-tolerant; if a 5V ISP programmer is used, add a series 100-ohm resistor on each pin. The internal 8 MHz oscillator provides only +/- 2% accuracy over temperature - use an external crystal when USB Full-Speed or Ethernet timing accuracy is required. The USB VBUS pin requires a 10 kOhm pull-down if host mode is not used.
合規資訊
Industrial temperature grade (I suffix) qualifies the part for -40C to +85C operation. Not AEC-Q100 qualified - choose a PIC32MX automotive variant for vehicular designs. RoHS and REACH compliant per Microchip's product declaration.
