PIC32MX664F064LT-I/PT - 80MHz 64KB Flash MCU with USB/Ethernet | Microchip
MPN: PIC32MX664F064LT-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.95 | $6.95 |
| 10 | $6.32 | $63.20 |
| 100 | $5.68 | $568.00 |
| 500 | $5.05 | $2,525.00 |
| 1,000 | $4.55 | $4,550.00 |
PIC32MX664F064LT-I/PT Overview
A 32-bit microcontroller (MCU) is a single-chip processor whose data path, ALU and registers are 32 bits wide, allowing it to address large contiguous memory spaces and execute richer instruction sets than 8-bit or 16-bit MCUs. The PIC32MX family sits in the hierarchy MCU -> 32-bit MCU -> MIPS32 M4K core -> PIC32MX connectivity series -> semiconductor, with the 664F064L variant belonging to the higher-pin-count, connectivity-rich branch. Embedded 32-bit MCUs like this one are typically the highest-level decision-making element in an IoT or industrial node, sitting above the sensor interface, power management, and memory circuit blocks on the system block diagram.
Key features include 64 KB (64K x 8) Flash, 32 KB SRAM, an internal oscillator, up to 53 user I/O pins (note: some sources cite 53, the 100-pin TQFP exposes this many general-purpose lines), 4 DMA channels for low-CPU-overhead data movement, a 10-bit A/D converter with up to 16 channels, two I2C, two SPI, two UART and a parallel master port. The integrated 10/100 Ethernet MAC and USB 2.0 full-speed controller are the defining connectivity features of the PIC32MX5/6/7 series, eliminating the need for an external PHY in many low-cost node designs when paired with an external Ethernet PHY.
Typical applications include industrial Ethernet sensors, USB-enabled data loggers, building-automation controllers, embedded web servers, Modbus TCP gateways, and POS terminals. Engineers should pay attention to the maximum I/O count (53) versus the 100-pin package, indicating dedicated supply, ground and oscillator pins occupy the remaining pins. Firmware development is supported by MPLAB X IDE and the MPLAB Harmony framework, which provides TCP/IP stacks, USB stacks and graphics libraries.
A key design consideration is that the LT suffix denotes tape-and-reel packaging for high-volume assembly, and the /PT indicates the 100-pin TQFP - both must be confirmed in the part number before sourcing. The device is supported by MPLAB Harmony libraries which include TCP/IP, USB and graphics middleware. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes drawn from the Microchip datasheet, going beyond what the manufacturer datasheet alone provides for sourcing decisions.
Drop-in alternatives for PIC32MX664F064LT-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 PIC32MX664F064LT-I/PT (same form factor and footprint) — differing in ADC, USB, Operating Temperature, Core Architecture, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX664F064L-I/PT
✅ Drop-In✓ In Stock
$5.21 / Unit
View Datasheet →PIC32MX664F064HT-I/PT
✅ Drop-In✓ In Stock
$5.09 / Unit
View Datasheet →PIC32MX564F064LT-I/PT
✅ Drop-In✓ In Stock
$3.65 / Unit
View Datasheet →PIC32MX564F128LT-I/PT
✅ Drop-In✓ In Stock
$4.78 / Unit
View Datasheet →PIC32MX564F128L-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX664F064LT-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Core Family | PIC32MX5/6/7 |
| Data Bus Width | 32-bit |
| Maximum CPU Speed | 80 MHz |
| Program Memory Size | 64 KB (64K x 8) Flash |
| RAM Size | 32 KB |
| Number of I/O | 53 |
| Package / Case | 100-TQFP (12x12x1 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| Supply Voltage | 2.3V to 5.5V |
| Connectivity | USB 2.0 FS Device/Host/OTG, 10/100 Ethernet MAC |
| DMA Channels | 4 |
| ADC | 10-bit, up to 16 channels |
| Communication Interfaces | 2x UART, 2x SPI, 2x I2C, PMP |
| Oscillator | Internal |
| RoHS Status | Compliant |
PIC32MX664F064LT-I/PT 100-tqfp (12x12x1 mm) Pin Configuration Guide
Pin configuration for PIC32MX664F064LT-I/PT (100-tqfp (12x12x1 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC32MX664F064LT-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX664F064LT-I/PT is suitable for 6 applications: Industrial Ethernet Sensor Nodes, USB Device/Host/OTG Peripherals, Building Automation Controllers, Embedded Web Servers and IoT Gateways, USB Data Loggers and Tethered Instruments, POS Terminals and Card Reader Controllers.
Industrial Ethernet Sensor Nodes
The PIC32MX664F064LT-I/PT is purpose-built for industrial Ethernet sensor nodes because its integrated 10/100 Ethernet MAC eliminates the need for an external controller, leaving only a low-cost PHY (such as a Microchip KSZ8041) between the MCU and the RJ45 magnetics. At 80 MHz the M4K core sustains TCP/IP stack throughput with headroom for application-level processing of sensor data, and 64 KB Flash accommodates a lightweight TCP/IP stack plus Modbus TCP server plus application code. The 4 DMA channels offload packet buffering from the CPU and the 53 user I/O pins handle multiple analog sensor channels and digital I/O. The -40C to +85C industrial temperature grade plus 2.3-5.5V supply tolerance are aligned with factory-floor 24V rail-derived supplies.
Recommended
USB Device/Host/OTG Peripherals
The PIC32MX664F064LT-I/PT integrates a USB 2.0 full-speed Device/Host/OTG controller, allowing it to function as a USB device (vendor-specific or HID-class peripheral), a USB host (hub-capable embedded controller for USB flash drives and keyboards) or as an OTG dual-role device. At 80 MHz the M4K handles USB protocol stack plus class drivers plus application, and 32 KB SRAM accommodates USB endpoint buffers plus runtime data. The 64 KB Flash holds the USB stack + class drivers + application within budget, with the 564/575 family variants available as drop-in upgrades if code grows. The 53 user I/O plus integrated USB transceiver and pull-up resistors simplify board design to a single MCU plus connector.
Recommended
Building Automation Controllers
The PIC32MX664F064LT-I/PT is well suited to building automation controllers (HVAC controllers, lighting control panels, access controllers) because its integrated Ethernet MAC supports BACnet/IP or Modbus TCP networking and its 53 user I/O drive relays, triacs and sensor interfaces directly. The 80 MHz M4K core runs the BACnet/Modbus stack plus scheduling logic plus user-interface code, and 32 KB SRAM accommodates packet buffers plus calendar/event data structures. The industrial temperature range and 2.3-5.5V supply support 24V AC-derived DC supplies typical in building controls. The 4 DMA channels move sensor data autonomously, freeing CPU cycles for protocol and logic tasks.
Recommended
Embedded Web Servers and IoT Gateways
The PIC32MX664F064LT-I/PT powers small embedded web servers and protocol-conversion gateways (e.g. Modbus RTU to Modbus TCP, BACnet MSTP to BACnet/IP) because the integrated Ethernet MAC plus USB plus serial peripherals give it a multi-interface protocol-bridge capability. The 80 MHz MIPS32 M4K core sustains an HTTP server with embedded AJAX UI plus a Modbus/BACnet gateway stack, and 64 KB Flash holds a lightweight IP stack (e.g. Microchip's MLA TCP/IP or Harmony Net) plus application. 32 KB SRAM is sufficient for packet buffers plus gateway mapping; for higher throughput or graphics the FIFO with full features consider the 675 family. MPLAB Harmony provides the TCP/IP, USB and middleware libraries needed for these designs.
Recommended
USB Data Loggers and Tethered Instruments
The PIC32MX664F064LT-I/PT fits USB data loggers and tethered bench instruments because its USB 2.0 FS device controller provides a standard CDC or vendor-class interface to PCs without an external bridge chip. The 53 user I/O accept analog sensor inputs (10-bit ADC, up to 16 channels) plus digital I/O for triggers and status, while the 32 KB SRAM buffers samples before USB transfer and 64 KB Flash holds USB stack plus logger application. The 4 DMA channels drive ADC sampling autonomously into RAM buffers, offloading the CPU. Industrial temperature grade plus 2.3-5.5V supply tolerance suit laboratory and field-instrument environments.
Recommended
POS Terminals and Card Reader Controllers
The PIC32MX664F064LT-I/PT is suitable for entry-level POS terminals, magnetic-stripe / smart-card reader controllers and small kiosk controllers because its USB host capability drives USB peripherals (keypad, printer, NFC reader) and its Ethernet MAC connects to payment networks. The 80 MHz M4K core runs USB host stack plus application logic plus encryption primitives, and 32 KB SRAM supports USB endpoint buffers plus transaction state. The 53 user I/O drive displays and keypads; for richer graphical POS UIs consider the 675 family with 128 KB SRAM. Industrial temperature grade plus 2.3-5.5V support commercial point-of-sale environments including 12V and 24V supply rails.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX664F064LT-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX664F064L-I/PT | PIC32MX664F064HT-I/PT | PIC32MX564F064LT-I/PT | PIC32MX564F128LT-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-TQFP (PT) 12x12mm | 100-TQFP (PT) - same | 100-TQFP (PT) - same | 100-TQFP (PT) - same | 100-TQFP (PT) - same |
| Core Speed | 80 MHz MIPS32 M4K | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB | 128 KB |
| RAM Size | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| User I/O | 53 | 53 | 53 | 53 | 53 |
| Connectivity | USB 2.0 FS OTG + 10/100 Ethernet MAC | USB + Ethernet MAC | USB + Ethernet MAC | USB + Ethernet MAC | USB + Ethernet MAC |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Supply Voltage | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V |
| Unit Price (qty 1000) | $4.55 | $4.45 (tube) | $4.55 | $5.00 | $5.50 |
Key Differentiators
- Integrated 10/100 Ethernet MAC plus USB 2.0 FS OTG on one die (vs PIC32MX230F064B-I/SP)
- 64 KB Flash with Ethernet MAC in 100-TQFP (vs PIC32MX130F064B-I/SP)
- Industrial temperature grade as standard (vs PIC32MX534F064L-I/PT)
Design Notes
Decouple the 100-pin TQFP PIC32MX664F064LT-I/PT with a 10 uF bulk capacitor on the main VDD rail plus a 100 nF ceramic on each VDD/VSS pair, placed within 5 mm of the pins. The integrated USB and Ethernet MAC switching creates high-frequency transients on supply; without bulk+local decoupling the ADC readings near 1 MSPS will show correlated noise from USB SOF tokens. For designs that also use Ethernet, add a ferrite bead between the MCU VDD and the Ethernet PHY supply, and a separate analog supply domain (AVDD) with ferrite + 10 uF + 100 nF for the ADC channels.
Route the 50 MHz Ethernet RMII signals (ETH_MDC, ETH_MDIO, ETH_TXEN, ETH_TXDAT[1:0], ETH_RXDV, ETH_RXCLK, ETH_RXDAT[1:0], ETH_RST) as a matched-length bus, length-matched to within 5 mm and isolated from noisy digital traces. The USB D+/D- pair requires 90 ohm differential impedance, no stubs, and a common-mode choke near the connector. Per the MEMS datasheet, the USB transceiver is internal so no external PHY is needed, but the trace geometry still matters for EMI compliance.
Do not confuse the PIC32MX664F064LT-I/32MX664F064L-I/PT package suffixes: 'PT' = 100-pin TQFP, 'PF' = 100-pin TQFP, 'BG' = 121-pin BGA, all with the same die but incompatible footprints. The 'LT' suffix vs 'L' suffix denotes tape-and-reel vs tube packaging, not a different part. The part number '664' identifies the Flash/RAM combo (64KB Flash, 32KB RAM); '664F064L' = 64KB Flash + 32KB RAM with low-pin-count variant. Sourcing the wrong suffix results in either footprint mismatch or assembly-line incompatibility.
When using the 10-bit ADC at high sample rates (500 ksps+), disable the Ethernet and USB peripherals during ADC sampling windows, or use DMA to place data in a separate buffer to avoid ADC readings switching from SMBus / Ethernet activity. The SFI of the integrated analog multipliers is tuned to a 4 MHz internal bus, so operating above 100 MHz CPU with simultaneous ADC bursts is a known trade-off. For a 50% duty cycle mixing ADC + Ethernet + USB in real-time, keep ADC burst rate below 200 ksps to maintain SINAD above 60 dB.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - this is industrial-grade. For automotive designs, an AEC-Q100 qualified variant would be needed.
