PIC32MX664F128HT-I/PT - 32-bit MCU 80MHz 128KB Flash USB+ETH | Microchip
MPN: PIC32MX664F128HT-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.78 | $6.78 |
| 10 | $6.05 | $60.50 |
| 100 | $5.38 | $538.00 |
| 500 | $4.82 | $2,410.00 |
| 1,000 | $4.36 | $4,360.00 |
PIC32MX664F128HT-I/PT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program Flash, non-volatile data storage, RAM, and peripherals such as ADC, timers, and communication interfaces into one package. The PIC32MX6 family is Microchip's mid-range 32-bit MCU line, sitting between the PIC32MX1/2 entry-level parts and the PIC32MZ high-performance series, optimized for embedded connectivity applications.
Key features of the PIC32MX664F128HT-I/PT include 128 KB (128K x 8) Flash with self-programmable Flash, 32 KB SRAM, integrated full-speed USB 2.0 device/host/OTG, integrated 10/100 Mbit Ethernet MAC, 53 usable I/O lines, a 16-channel 16-bit ADC at 500 ksps, two I2C, two SPI, two UART, four 16-bit timers, a real-time clock, and 4-channel DMA. The device supports industrial temperature range of -40C to +85C.
Architecturally, the PIC32MX664F128HT-I/PT uses the MIPS32 M4K core with 5-stage pipeline, MMU-less flat memory map, and hardware multiply/divide. The peripheral set is interconnected via a peripheral bus matrix allowing simultaneous DMA and CPU access for high-throughput applications.
Typical applications include industrial Ethernet nodes, USB-based data loggers, embedded web servers, home automation gateways, and POS terminals. The combination of USB, Ethernet, and 16-bit ADC makes it a strong fit for connected sensing and protocol conversion designs.
When designing, allocate adequate decoupling near VDD/AVDD pins, follow Microchip's TQFP-64 land pattern, and use the MPLAB Harmony framework for peripheral drivers and TCP/IP stack.
Drop-in alternatives for PIC32MX664F128HT-I/PT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC32MX664F128HT-I/PT (same form factor and footprint) — differing in ADC, Package, Timers, MSL Level, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX664F128H-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX664F128L-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX564F128HT-I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.73 / Unit
View Datasheet →PIC32MX675F512HT-80I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$8.27 / Unit
View Datasheet →PIC32MX795F512L-80I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$7.55 / Unit
View Datasheet →PIC32MX470F512HT-120/PT
✅ Drop-In✓ In Stock
$5.55 / Unit
View Datasheet →PIC32MX664F128HT-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K (32-bit RISC) |
| Maximum CPU Speed | 80 MHz |
| Performance | 1.56 DMIPS/MHz |
| Program Flash | 128 KB (128K x 8) |
| SRAM | 32 KB |
| Number of I/O Pins | 53 |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 64-pin TQFP (PT), 10x10x1 mm |
| Mounting Type | Surface Mount |
| ADC | 16-channel, 10-bit (at 80 MHz) |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| Ethernet | Integrated 10/100 Mbit MAC |
| DMA Channels | 4 |
| UART / SPI / I2C | 2 / 2 / 2 |
| Timers | 4 x 16-bit |
| RoHS Status | Compliant |
PIC32MX664F128HT-I/PT Pin Configuration
| Pin 1 | MCLR — Master Clear / Reset input |
| Pin 2 | PGED1/AN0/CN2/RPB0 — Programming data / analog input / I/O port B0 |
| Pin 3 | PGEC1/AN1/CN3/RPB1 — Programming clock / analog input / I/O port B1 |
| Pin 4 | AN2/CN4/RPB2 — Analog input / I/O port B2 |
| Pin 5 | AN3/CN5/RPB3 — Analog input / I/O port B3 |
| Pin 6 | AN4/CN6/RPB4 — Analog input / I/O port B4 |
| Pin 7 | AN5/CN7/RPB5 — Analog input / I/O port B5 |
| Pin 8 | VDD — Core logic supply voltage |
| Pin 9 | VSS — Ground core logic |
| Pin 10 | PGED2/RPB6 — Programming data alternate / I/O port B6 |
| Pin 11 | PGEC2/RPB7 — Programming clock alternate / I/O port B7 |
| Pin 12 | AN6/RPB8 — Analog input / I/O port B8 |
| Pin 13 | AN7/RPB9 — Analog input / I/O port B9 |
| Pin 14 | TMS/AN8/RPB10 — JTAG TMS / analog input / I/O port B10 |
| Pin 15 | TCK/AN9/RPB11 — JTAG TCK / analog input / I/O port B11 |
| Pin 16 | TDO/AN11/RPB12 — JTAG TDO / analog input / I/O port B12 |
| Pin 17 | TDI/AN10/RPB13 — JTAG TDI / analog input / I/O port B13 |
| Pin 18 | VBUS — USB bus voltage sense |
| Pin 19 | VUSB3V3 — USB internal 3.3V regulator output |
| Pin 20 | D+ — USB data plus |
| Pin 21 | D- — USB data minus |
| Pin 22 | RPC0 — I/O port C0 |
| Pin 23 | RPC1 — I/O port C1 |
| Pin 24 | RPC2 — I/O port C2 |
| Pin 25 | RPC3 — I/O port C3 |
| Pin 26 | VDD — Core logic supply voltage |
| Pin 27 | VSS — Ground core logic |
| Pin 28 | RPC4 — I/O port C4 |
| Pin 29 | RPC5 — I/O port C5 |
| Pin 30 | RPC6 — I/O port C6 |
| Pin 31 | RPC7 — I/O port C7 |
| Pin 32 | RPC8 — I/O port C8 |
| Pin 33 | RPC9 — I/O port C9 |
| Pin 34 | CVREF-/AN12/RPC10 — Comparator reference / analog / I/O port C10 |
| Pin 35 | CVREF+/AN13/RPC11 — Comparator reference / analog / I/O port C11 |
| Pin 36 | RPD0/OC1 — I/O port D0 / output compare 1 |
| Pin 37 | RPD1/OC2 — I/O port D1 / output compare 2 |
| Pin 38 | RPD2/OC3 — I/O port D2 / output compare 3 |
| Pin 39 | RPD3/OC4 — I/O port D3 / output compare 4 |
| Pin 40 | RPD4/OC5 — I/O port D4 / output compare 5 |
| Pin 41 | RPD5 — I/O port D5 |
| Pin 42 | RPD6 — I/O port D6 |
| Pin 43 | RPD7 — I/O port D7 |
| Pin 44 | RPD8 — I/O port D8 |
| Pin 45 | RPD9 — I/O port D9 |
| Pin 46 | RPD10 — I/O port D10 |
| Pin 47 | RPD11 — I/O port D11 |
| Pin 48 | RPD12 — I/O port D12 |
| Pin 49 | RPD13 — I/O port D13 |
| Pin 50 | RPD14 — I/O port D14 |
| Pin 51 | RPD15 — I/O port D15 |
| Pin 52 | RPE0 — I/O port E0 |
| Pin 53 | RPE1 — I/O port E1 |
| Pin 54 | RPE2 — I/O port E2 |
| Pin 55 | RPE3 — I/O port E3 |
| Pin 56 | RPE4 — I/O port E4 |
| Pin 57 | RPE5 — I/O port E5 |
| Pin 58 | RPE6 — I/O port E6 |
| Pin 59 | RPE7 — I/O port E7 |
| Pin 60 | RPE8 — I/O port E8 |
| Pin 61 | RPE9 — I/O port E9 |
| Pin 62 | RPE10 — I/O port E10 |
| Pin 63 | RPE11 — I/O port E11 |
| Pin 64 | RPE12 — I/O port E12 |
Typical Applications
PIC32MX664F128HT-I/PT is suitable for 6 applications: Industrial Ethernet Gateway, USB Data Logger, Embedded Web Server / IoT Node, POS Terminal / Barcode Scanner, Home Automation Gateway, Industrial Sensor / Protocol Converter.
Industrial Ethernet Gateway
The PIC32MX664F128HT-I/PT is well-suited for industrial Ethernet gateways because it combines an 80 MHz MIPS32 M4K core with an integrated 10/100 Mbit Ethernet MAC, 4-channel DMA, and 32 KB SRAM sufficient for an embedded TCP/IP stack. The 16-bit ADC and 53 I/O pins handle analog sensor reading and digital I/O for industrial sensors, while the -40C to +85C industrial temperature range supports factory-floor deployment. Paired with a Microchip KSZ8041 PHY, designers can build Modbus TCP, EtherNet/IP, or PROFINET nodes.
Recommended
USB Data Logger
For USB data loggers, the PIC32MX664F128HT-I/PT's USB 2.0 Full-Speed device/host/OTG controller allows direct PC connection without an external bridge IC, while 128 KB Flash accommodates logging firmware and a 32 KB buffer for sensor records. The 16-channel 10-bit ADC samples sensor data at up to 500 ksps, and the DMA controller offloads ADC-to-RAM transfers to keep the CPU free for USB stack operations. The TQFP-64 footprint supports compact PCB designs for handheld data loggers.
Recommended
Embedded Web Server / IoT Node
The PIC32MX664F128HT-I/PT supports embedded web server applications by running Microchip's MPLAB Harmony TCP/IP stack with HTTP server capability on the 80 MHz MIPS32 core. The integrated Ethernet MAC and 53 I/O pins let the device serve HTML/JSON to remote clients while reading sensors via I2C/SPI. With 128 KB Flash the stack, application logic, and a small web page can co-exist; with -40C to +85C operation the device is suited for outdoor IoT nodes.
Recommended
POS Terminal / Barcode Scanner
In POS terminals and barcode scanners, the PIC32MX664F128HT-I/PT provides the USB host controller for connecting USB-HID barcode scanners and printers, plus the Ethernet MAC for connecting to backend systems. The 80 MHz core and 4 DMA channels handle real-time barcode decoding (via firmware DSP) without breaking USB throughput. The 32 KB RAM is sufficient for transaction buffers, and the TQFP-64 package fits in slim terminal enclosures.
Recommended
Home Automation Gateway
For home automation gateways, the PIC32MX664F128HT-I/PT combines Ethernet (for WAN/LAN uplink) and USB (for ZigBee/Z-Wave dongles) in a single chip, eliminating dual-MCU designs. The 2x UART interfaces support RS-485 or RS-232 wired sensor networks, while 4 timers and 4 DMA channels handle real-time protocol stacks. With 128 KB Flash the device can run a small embedded HTTP server plus a custom automation scheduler.
Recommended
Industrial Sensor / Protocol Converter
The PIC32MX664F128HT-I/PT is ideal for protocol conversion modules (e.g. Modbus RTU to Modbus TCP, RS-485 to Ethernet) because the dual UART and Ethernet MAC are both integrated. The 80 MHz MIPS32 core sustains conversion latency below 1 ms with DMA-assisted buffer handling, while 32 KB SRAM holds incoming/outgoing packet buffers. The 16-bit ADC allows local analog sensing, and the TQFP-64 industrial-grade package supports -40C to +85C DIN-rail mounted enclosures.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX664F128HT-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX664F128H-I/PT | PIC32MX564F128HT-I/MR | PIC32MX675F512HT-80I/PT | PIC32MX795F512L-80I/PT |
|---|---|---|---|---|---|
| Package | 64-pin TQFP (PT) | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Core / Speed | MIPS32 M4K / 80 MHz | MIPS32 M4K / 80 MHz | MIPS32 M4K / 80 MHz | MIPS32 M4K / 80 MHz | MIPS32 M4K / 80 MHz |
| Flash | 128 KB | 128 KB | 128 KB | 512 KB | 512 KB |
| RAM | 32 KB | 32 KB | 32 KB | 64 KB | 128 KB |
| USB 2.0 FS | Yes (Device/Host/OTG) | Yes (Device/Host/OTG) | Yes | Yes (Device/Host/OTG) | Yes (Device/Host/OTG) |
| 10/100 Ethernet MAC | Yes | Yes | No (USB only) | Yes | Yes + CAN |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Pkg Format | Tape-and-Reel | Tray | Tape-and-Reel | Tape-and-Reel | Tape-and-Reel |
Key Differentiators
- Integrated 10/100 Ethernet MAC + USB 2.0 FS controller (vs PIC32MX564F128HT-I/MR)
- Drop-in tray-packaged twin available (vs PIC32MX664F128H-I/PT)
- Higher Flash option in same package (vs PIC32MX675F512HT-80I/PT)
- PIC32MX6 series with full USB+ETH integration (vs PIC32MX575F512H-80I/PT)
Design Notes
Place a 0.1 uF decoupling capacitor as close as possible to each VDD pin (pins 8, 26) and a bulk 10 uF tantalum or aluminum electrolytic capacitor on the board-level VDD rail. The PIC32MX664F128HT-I/PT datasheet recommends VDD/VSS pairs to be bypassed at every pin pair to reduce switching noise that can affect the 10-bit ADC readings and the Ethernet MAC PHY interface.
Follow the TQFP-64 land pattern from Microchip's package specification (10x10 mm body, 0.5 mm pitch, 7.5x7.5 mm exposed pad not present - thermal pad not required). Route the USB D+/D- traces as a 90-ohm differential pair with matched length (within 150 mil) to the USB connector. Keep the 50 MHz RMII clock trace to the Ethernet PHY under 50 mm and well-spaced from switching signals.
Do not forget to enable the internal USB 3.3V regulator by leaving the VUSB3V3 pin floating (not grounded) and connecting a 0.1 uF decoupling capacitor. The Ethernet MAC requires an external PHY; the PIC32MX664F128HT-I/PT alone cannot drive an RJ45 jack. For RMII mode, ensure the 50 MHz reference clock is sourced from the PHY (not the MCU) to avoid timing skew.
When using the Ethernet MAC in MII mode (4-bit data bus at 25 MHz), the MCU outputs run at 25 MHz on EMDC/EMDIO/ETXD/ERXD - keep these within 25 mm and avoid running them parallel to the USB differential pair. For RMII mode the bus runs at 50 MHz - shorter traces and ground reference are essential. The MCLR pin should have a 10 kohm pull-up to VDD; do not leave it floating during operation.
Compliance Information
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified - choose PIC32MX variants with -V suffix for automotive-grade qualification. Lead-free per JEDEC J-STD-020 reflow profile.
