PIC32MX664F064HT-I/PT - 80MHz 32-bit MCU 64KB Flash USB Ethernet | Microchip
MPN: PIC32MX664F064HT-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.95 | $7.95 |
| 10 | $7.16 | $71.60 |
| 100 | $6.36 | $636.00 |
| 500 | $5.72 | $2,860.00 |
| 1,000 | $5.09 | $5,090.00 |
PIC32MX664F064HT-I/PT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and programmable peripherals. The PIC32MX family specifically uses the MIPS32 M4K core - a 32-bit RISC architecture running at up to 80 MHz - and sits within Microchip's broader portfolio of PIC microcontrollers. MCUs in this class bridge the gap between 8/16-bit controllers and full application processors, and they typically operate without an external memory bus or operating system. The PIC32MX5/6/7 series with integrated Ethernet and USB targets connected-node designs that previously required a separate network processor or external PHY.
Key features include 64 KB (64K x 8) Flash program memory, 32 KB SRAM, 51 digital I/O pins, four DMA channels, two I2C, two SPI, two UART, five 16-bit timers, five input-capture and five output-compare modules, an RTCC, and a 10-bit 1 MSPS ADC with up to 16 channels. The integrated 10/100 Ethernet MAC with RMII/MII interface and USB 2.0 Full-Speed OTG reduce external component count, while the parallel master port (PMP) supports external bus expansion. Hardware crypto/hash is not included on this part.
Architecturally, the M4K core executes most instructions in a single cycle, achieving 1.56 DMIPS/MHz, and the dual-set shadow register file enables fast interrupt response. The 64 KB Flash is organized for self-programming under firmware control, and the 32 KB RAM is large enough for full TCP/IP stacks such as Microchip's MPLAB Harmony networking services.
Typical applications include industrial Ethernet nodes, USB peripherals and device/host/OTG bridges, home-automation gateways, and M2M/IoT connected sensors. Designers use this part when they need a single-chip solution that combines an MCU with deterministic real-time control and Ethernet/USB connectivity.
When designing, ensure the external Ethernet PHY magnetics and 25 MHz oscillator meet the RMII/MII timing budget; for USB-OTG operation, add a 100 uF bulk capacitor on VBUS to meet inrush-current requirements. Keep analog and digital grounds separated under the IC and tie them at a single point near the chip.
This page synthesizes distributor pricing, drop-in PIC32MX alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers evaluate alternatives and lifecycle risk for the PIC32MX664F064HT-I/PT.
Drop-in alternatives for PIC32MX664F064HT-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 PIC32MX664F064HT-I/PT (same form factor and footprint) — differing in ADC, Operating Temperature, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX664F064H-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX664F064HT-V/PT
✅ Drop-In✓ In Stock
$5.04 / Unit
View Datasheet →PIC32MX564F064HT-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX664F064LT-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.55 / Unit
View Datasheet →PIC32MX675F256HT-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX795F512HT-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX664F064HT-I/PT Maximum Ratings & Electrical Characteristics
| Core | MIPS32 M4K (32-bit RISC) |
| Operating Frequency | 80 MHz (max) |
| Program Memory (Flash) | 64 KB (64K x 8) |
| Data Memory (SRAM) | 32 KB |
| Package | 64-pin TQFP (PT) 10x10 mm |
| Operating Temperature | -40C to +85C (Industrial) |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| I/O Pins | 51 |
| Ethernet MAC | 10/100 Mbit (RMII/MII) |
| USB | USB 2.0 Full-Speed OTG |
| DMA Channels | 4 |
| ADC | 10-bit, 1 MSPS, up to 16 channels |
| Timers (16-bit) | 5 |
| Input Capture / Output Compare | 5 / 5 |
| UART / SPI / I2C | 2 / 2 / 2 |
| Parallel Master Port (PMP) | Yes |
| Mounting Type | Surface Mount |
| MSL Level | 3 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC32MX664F064HT-I/PT Pin Configuration
| Pin 1 | RPB0/AN0 — Remappable I/O / ADC analog input 0 |
| Pin 2 | RPB1/AN1 — Remappable I/O / ADC analog input 1 |
| Pin 3 | RPB2/AN2 — Remappable I/O / ADC analog input 2 |
| Pin 4 | RPB3/AN3 — Remappable I/O / ADC analog input 3 |
| Pin 5 | RPB4/AN4 — Remappable I/O / ADC analog input 4 |
| Pin 6 | RPB5/AN5 — Remappable I/O / ADC analog input 5 |
| Pin 7 | RPB6/AN6 — Remappable I/O / ADC analog input 6 |
| Pin 8 | RPB7/AN7 — Remappable I/O / ADC analog input 7 |
| Pin 9 | RPB8/AN8 — Remappable I/O / ADC analog input 8 |
| Pin 10 | RPB9/AN9 — Remappable I/O / ADC analog input 9 |
| Pin 11 | VSS — Ground |
| Pin 12 | VDD — Core supply (2.3-3.6 V) |
| Pin 13 | RPB10/AN10 — Remappable I/O / ADC analog input 10 |
| Pin 14 | RPB11/AN11 — Remappable I/O / ADC analog input 11 |
| Pin 15 | RPB12/AN12 — Remappable I/O / ADC analog input 12 |
| Pin 16 | RPB13/AN13 — Remappable I/O / ADC analog input 13 |
| Pin 17 | RPB14/AN14 — Remappable I/O / ADC analog input 14 |
| Pin 18 | RPB15/AN15/OCFB — Remappable I/O / ADC analog input 15 / Output Compare F B |
| Pin 19 | VSS — Ground |
| Pin 20 | VDD — Core supply (2.3-3.6 V) |
| Pin 21 | RPC0/INT0 — Remappable I/O / External interrupt 0 |
| Pin 22 | RPC1/INT1 — Remappable I/O / External interrupt 1 |
| Pin 23 | RPC2/OC1 — Remappable I/O / Output Compare 1 |
| Pin 24 | RPC3/OC2 — Remappable I/O / Output Compare 2 |
| Pin 25 | RPC4/OC3 — Remappable I/O / Output Compare 3 |
| Pin 26 | RPC5/OC4 — Remappable I/O / Output Compare 4 |
| Pin 27 | RPC6/OC5 — Remappable I/O / Output Compare 5 |
| Pin 28 | RPC7/OC6 — Remappable I/O / Output Compare 6 |
| Pin 29 | RPC8/U1TX — Remappable I/O / UART1 transmit |
| Pin 30 | RPC9/U1RX — Remappable I/O / UART1 receive |
| Pin 31 | VSS — Ground |
| Pin 32 | VDD — Core supply (2.3-3.6 V) |
| Pin 33 | RPC10/U1CTS — Remappable I/O / UART1 clear-to-send |
| Pin 34 | RPC11/U1RTS — Remappable I/O / UART1 request-to-send |
| Pin 35 | RPC12/IC1 — Remappable I/O / Input Capture 1 |
| Pin 36 | RPC13/IC2 — Remappable I/O / Input Capture 2 |
| Pin 37 | RPC14/IC3 — Remappable I/O / Input Capture 3 |
| Pin 38 | RPC15/IC4 — Remappable I/O / Input Capture 4 |
| Pin 39 | VSS — Ground |
| Pin 40 | VDD — Core supply (2.3-3.6 V) |
| Pin 41 | RPD0/INT2 — Remappable I/O / External interrupt 2 |
| Pin 42 | RPD1/INT3 — Remappable I/O / External interrupt 3 |
| Pin 43 | RPD2/INT4 — Remappable I/O / External interrupt 4 |
| Pin 44 | RPD3/INT5 — Remappable I/O / External interrupt 5 |
| Pin 45 | RPD4/IC5 — Remappable I/O / Input Capture 5 |
| Pin 46 | RPD5/RTCC — Remappable I/O / Real-Time Clock Calendar |
| Pin 47 | RPD6/OCFA — Remappable I/O / Output Compare F A |
| Pin 48 | RPD7/OCFB — Remappable I/O / Output Compare F B |
| Pin 49 | RPD8/RTCC — Remappable I/O / Real-Time Clock Calendar |
| Pin 50 | RPD9/RTCC — Remappable I/O / Real-Time Clock Calendar |
| Pin 51 | VSS — Ground |
| Pin 52 | VDD — Core supply (2.3-3.6 V) |
| Pin 53 | RPD10/SCK1 — Remappable I/O / SPI1 clock |
| Pin 54 | RPD11/SDI1 — Remappable I/O / SPI1 data in |
| Pin 55 | RPD12/SDO1 — Remappable I/O / SPI1 data out |
| Pin 56 | RPD13/SS1 — Remappable I/O / SPI1 slave select |
| Pin 57 | RPD14/SDA1 — Remappable I/O / I2C1 data |
| Pin 58 | RPD15/SCL1 — Remappable I/O / I2C1 clock |
| Pin 59 | VSS — Ground |
| Pin 60 | VDD — Core supply (2.3-3.6 V) |
| Pin 61 | RPG6/SOSCO — Secondary oscillator output (32.768 kHz) |
| Pin 62 | RPG7/SOSCI — Secondary oscillator input (32.768 kHz) |
| Pin 63 | RPG8/RX2 — Remappable I/O / UART2 receive |
| Pin 64 | MCLR — Master clear reset (active low) |
Typical Applications
PIC32MX664F064HT-I/PT is suitable for 7 applications: Industrial Ethernet Node, USB Device/Host/OTG Peripheral, Home Automation Gateway, M2M / IoT Connected Sensor, USB-to-UART / USB-to-SPI Bridge, Audio Streaming over Ethernet (Dante/AES67 Lite), Industrial HMI / Control Panel.
Industrial Ethernet Node
The PIC32MX664F064HT-I/PT is well suited for industrial Ethernet nodes thanks to its integrated 10/100 Mbit MAC (RMII/MII), 80 MHz MIPS32 core, and -40C to +85C industrial temperature rating. The on-chip MAC eliminates an external network controller, leaving only a PHY, isolation transformers, and an RJ45 jack external to the MCU. With 64 KB Flash and 32 KB RAM, the part runs Microchip's MPLAB Harmony TCP/IP stack alongside a Modbus TCP, EtherNet/IP, or PROFINET application layer. The four DMA channels offload packet-copy and ADC operations so the CPU can service the real-time control loop deterministically.
Recommended
USB Device/Host/OTG Peripheral
The PIC32MX664F064HT-I/PT integrates USB 2.0 Full-Speed OTG, making it ideal for USB peripherals such as data loggers, HID devices, and CDC-class virtual COM ports. The OTG controller supports both host and device roles, enabling dual-role designs like USB memory-stick data transfer or smartphone charging ports. The 32 KB SRAM comfortably holds USB descriptors and ring buffers, while the DMA channels handle bulk transfer endpoints without CPU intervention. Designers only need an external 100 uF bulk capacitor on VBUS to meet USB-OTG inrush requirements.
Recommended
Home Automation Gateway
The PIC32MX664F064HT-I/PT acts as a low-cost home-automation gateway connecting Wi-Fi/Zigbee/Z-Wave bridges to Ethernet backhaul. Its 80 MHz MIPS32 core and 32 KB RAM run a TCP/IP stack plus application logic for sensor aggregation or cloud MQTT publishing. The 51 GPIO and multiple UART/SPI/I2C peripherals give designers a wide margin for connecting multiple radios and user-interface buttons/LEDs. Industrial temperature rating ensures reliable operation in attic or garage enclosures.
Recommended
M2M / IoT Connected Sensor
For machine-to-machine (M2M) and IoT sensor nodes, the PIC32MX664F064HT-I/PT provides on-chip Ethernet and USB, removing the need for an external MCU+network processor stack. The 10-bit 1 MSPS ADC with up to 16 channels samples analog sensors at high speed, and the four DMA channels stream ADC results into memory without CPU load. Low-cost sensor hubs use this part to publish temperature, pressure, or flow telemetry over Ethernet to a SCADA or cloud server. The 2.3 V to 3.6 V supply range matches battery-backed or PoE-powered designs.
Recommended
USB-to-UART / USB-to-SPI Bridge
Designers commonly use the PIC32MX664F064HT-I/PT as a USB-to-UART or USB-to-SPI bridge, taking advantage of its USB device controller and dual UART/SPI peripherals. The 80 MHz core handles USB enumeration and protocol conversion with low latency, and the 64 KB Flash allows on-chip firmware update via USB DFU. Industrial temperature rating and small TQFP footprint simplify integration inside cable assemblies or compact dongles.
Recommended
Audio Streaming over Ethernet (Dante/AES67 Lite)
The PIC32MX664F064HT-I/PT can serve as a low-channel-count audio-over-IP endpoint thanks to its Ethernet MAC, DMA channels, and I2S peripheral. The 32 KB SRAM buffers compressed audio packets, while the DMA engines move audio samples between I2S and network memory autonomously. Industrial-grade temperature and deterministic interrupt response make this part suitable for fixed-install audio nodes.
Recommended
Industrial HMI / Control Panel
For human-machine interface (HMI) panels and operator-control displays, the PIC32MX664F064HT-I/PT drives character or graphical LCDs via its parallel master port (PMP) and reads keypads through GPIO. The Ethernet MAC enables remote HMI configuration and SCADA connectivity, while the USB-OTG port supports firmware updates from a service laptop. Designers appreciate the 51 GPIO, five 16-bit timers, and 10-bit ADC for backlight control, buzzer drive, and analog sensor readout.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX664F064HT-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX664F064H-I/PT | PIC32MX664F064HT-V/PT | PIC32MX564F064HT-I/PT | PIC32MX664F064LT-I/PT | PIC32MX675F256HT-I/PT | PIC32MX795F512HT-I/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP (10x10 mm) | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same |
| Core / Max Frequency | MIPS32 M4K / 80 MHz | MIPS32 M4K / 80 MHz | MIPS32 M4K / 80 MHz | MIPS32 M4K / 80 MHz | MIPS32 M4K / 80 MHz | MIPS32 M4K / 80 MHz | MIPS32 M4K / 80 MHz |
| Flash | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 256 KB (+300%) | 512 KB (+700%) |
| RAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 64 KB (+100%) | 128 KB (+300%) |
| Ethernet MAC | 10/100 Mbit | 10/100 Mbit | 10/100 Mbit | No Ethernet | 10/100 Mbit | 10/100 Mbit | 10/100 Mbit |
| USB | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG |
| Operating Temperature | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +105C (V grade) | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +85C (I grade) |
Key Differentiators
- Integrated 10/100 Ethernet MAC plus USB-OTG in one MCU (vs PIC32MX564F064HT-I/PT)
- Industrial -40C to +85C temperature grade in standard part (vs PIC32MX664F064HT-V/PT)
- Industrial temperature grade with same silicon as commercial parts (vs PIC32MX675F256HT-I/PT)
Design Notes
Estimated: At 80 MHz full operation with Ethernet MAC and USB active, the PIC32MX664F064HT-I/PT typically draws 60-80 mA from the 3.3 V rail. Place a 10 uF bulk capacitor plus 0.1 uF decoupling on each VDD pin pair (pins 12/11, 20/19, 32/31, 40/39, 52/51, 60/59) to suppress switching noise. For USB-OTG host mode, add a 100 uF bulk capacitor on VBUS to meet inrush-current requirements per the USB specification.
Route the 50 ohm Ethernet RMII/MII traces with controlled impedance (typically 50 ohm single-ended to ground) and keep total trace length below 50 mm. Match the 25 MHz reference oscillator trace length to the ETH_CLK pin to within 2 mm of the PHY to avoid duty-cycle distortion. Place the PHY close to the RJ45 jack with the magnetics between them to minimize EMI and common-mode noise.
Do not assume the H (high-pin-count) and L (low-pin-count) variants of the PIC32MX664 family share identical pinout - the L variant reduces pin count by removing dedicated peripherals. When migrating between H and L parts in the same 64-pin TQFP, verify pin function remapping in MPLAB X. Also, the MCLR pin (pin 64) must be pulled up to VDD via a 10 kohm resistor; do not leave it floating.
Separate analog and digital ground planes under the PIC32MX664F064HT-I/PT to prevent ADC noise coupling. Place the ADC reference decoupling capacitor (0.1 uF) as close as possible to the AVSS/AVDD pins if used. For best ADC performance, use the lowest pin-count analog input channel possible and avoid routing high-frequency digital traces adjacent to analog traces.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - this is an industrial-grade part. Halogen-free status not explicitly stated in available data.
