PIC32MX664F128L-V/PF - 80MHz 32-bit MCU 128KB Flash USB/Ethernet 100-TQFP | Microchip
MPN: PIC32MX664F128L-V/PF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.95 | $8.95 |
| 10 | $8.06 | $80.60 |
| 100 | $6.83 | $683.00 |
| 500 | $6.12 | $3,060.00 |
| 1,000 | $5.45 | $5,450.00 |
PIC32MX664F128L-V/PF Overview
A microcontroller (MCU) is a single-chip computer containing a processor, memory (Flash for code, RAM for data), and programmable peripherals. The PIC32MX family uses the MIPS32 M4K core architecture, placing it in the broader taxonomy of 32-bit microcontrollers -> microcontrollers -> integrated circuits -> semiconductors. Compared with 8/16-bit MCUs, 32-bit parts deliver higher MIPS per MHz and richer peripheral integration; compared with ARM Cortex-M3 parts of the same vintage, the PIC32MX family emphasizes deterministic interrupt latency and integrated connectivity peripherals such as USB OTG and Ethernet MAC.
Key features include 128KB single-cycle Flash, 32KB SRAM, USB 2.0 Full-Speed/High-Speed OTG with on-chip transceiver, 10/100 Ethernet MAC with MII/RMII interface, up to 16 ADC channels at 10-bit 1MSps, 5 16-bit timers/counters, two I²C, two SPI, two UART channels, and an integrated DMA controller with up to 8 channels. The 100-pin TQFP provides 85 general-purpose I/O pins and supports JTAG and 2-wire programming/debug interfaces.
The architecture uses a 5-stage pipeline MIPS32 M4K core with hardware multiply/divide, providing up to 1.56 DMIPS/MHz. The on-chip regulator provides a single 2.3V-3.6V supply input, simplifying power-tree design versus parts requiring separate core/IO rails.
Typical applications include industrial control with Ethernet connectivity, USB peripherals (CDC/HID/MSC), home automation gateways, embedded web servers, and point-of-sale terminals. The combination of integrated Ethernet and USB reduces BOM cost and PCB area versus discrete solutions requiring external PHY chips.
When designing with the PIC32MX664F128L-V/PF, ensure the Vcap pin has a low-ESR 10uF ceramic capacitor and place it within 6mm of the pin to stabilize the internal 1.8V regulator. Use Microchip's MPLAB Harmony framework for peripheral configuration to avoid manual register-level timing pitfalls.
This page synthesizes current distributor stock, drop-in same-package alternatives from Microchip's PIC32MX family, and practical design notes drawn from the manufacturer datasheet and reference designs, providing decision-support content not bundled in the original datasheet PDF.
Drop-in alternatives for PIC32MX664F128L-V/PF — 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 PIC32MX664F128L-V/PF (same form factor and footprint) — differing in ADC, Package, Core Architecture, DMA Channels, CAN.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX664F128LT-V/PF
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX664F128L-I/PF
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX564F128L-V/PF
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX664F064L-V/PF
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX575F512L-80I/PF
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX795F512L-80I/PF
✅ Drop-In✓ In Stock
$9.95 / Unit
View Datasheet →PIC32MX664F128L-V/PF Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Bit Width | 32-bit |
| Core Count | Single-core |
| Maximum CPU Clock | 80 MHz |
| Program Flash Memory | 128 KB (128K x 8) |
| SRAM | 32 KB |
| Operating Voltage | 2.3 V to 3.6 V |
| Package | 100-TQFP (14x14 mm) |
| Mounting Type | Surface Mount |
| USB Interface | USB 2.0 OTG (Full-Speed/High-Speed on-chip transceiver) |
| Ethernet MAC | 10/100 Mbit MII/RMII |
| ADC | 10-bit, up to 16 channels, 1 MSps |
| DMA Channels | 8 |
| General-Purpose I/O | 85 pins |
| Operating Temperature | -40C to +105C (V grade) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC32MX664F128L-V/PF Pin Configuration
| Pin 1 | RG15 — General purpose I/O |
| Pin 2 | VDD — Supply voltage (2.3V-3.6V) |
| Pin 3 | RP10/RD0 — Remappable peripheral / I/O |
| Pin 4 | RP11/RD1 — Remappable peripheral / I/O |
| Pin 5 | RP12/RD2 — Remappable peripheral / I/O |
| Pin 6 | RP13/RD3 — Remappable peripheral / I/O |
| Pin 7 | RP14/RD4 — Remappable peripheral / I/O |
| Pin 8 | RP15/RD5 — Remappable peripheral / I/O |
| Pin 9 | RP16/RD6 — Remappable peripheral / I/O |
| Pin 10 | RP17/RD7 — Remappable peripheral / I/O |
| Pin 11 | VCAP — Internal 1.8V LDO bypass (10uF low-ESR) |
| Pin 12 | RG6 — General purpose I/O |
| Pin 13 | RG7 — General purpose I/O |
| Pin 14 | RG8 — General purpose I/O |
| Pin 15 | RG9 — General purpose I/O |
| Pin 16 | VSS — Ground reference |
| Pin 17 | RF0 — General purpose I/O |
| Pin 18 | RF1 — General purpose I/O |
| Pin 19 | VDD — Supply voltage (2.3V-3.6V) |
| Pin 20 | RF2 — General purpose I/O |
| Pin 21 | RF3 — General purpose I/O |
| Pin 22 | RF4 — General purpose I/O |
| Pin 23 | RF5 — General purpose I/O |
| Pin 24 | RF6 — General purpose I/O |
| Pin 25 | RF7 — General purpose I/O |
| Pin 26 | VSS — Ground reference |
| Pin 27 | RF8 — General purpose I/O |
| Pin 28 | RF9 — General purpose I/O |
| Pin 29 | RF10 — General purpose I/O |
| Pin 30 | RF11 — General purpose I/O |
| Pin 31 | RF12 — General purpose I/O |
| Pin 32 | VDD — Supply voltage (2.3V-3.6V) |
| Pin 33 | VSS — Ground reference |
| Pin 34 | RC1 — General purpose I/O |
| Pin 35 | RC2 — General purpose I/O |
| Pin 36 | RC3 — General purpose I/O |
| Pin 37 | RC4 — General purpose I/O |
| Pin 38 | VDD — Supply voltage (2.3V-3.6V) |
| Pin 39 | OSC1/RC12 — Crystal oscillator input / GPIO |
| Pin 40 | OSC2/RC13 — Crystal oscillator output / GPIO |
| Pin 41 | VSS — Ground reference |
| Pin 42 | RA0 — General purpose I/O |
| Pin 43 | RA1 — General purpose I/O |
| Pin 44 | RA3 — General purpose I/O |
| Pin 45 | RA4 — General purpose I/O |
| Pin 46 | RA5 — General purpose I/O |
| Pin 47 | RA6 — General purpose I/O |
| Pin 48 | RA7 — General purpose I/O |
| Pin 49 | RA8 — General purpose I/O |
| Pin 50 | VDD — Supply voltage (2.3V-3.6V) |
| Pin 51 | VSS — Ground reference |
| Pin 52 | RB0 — General purpose I/O / programming |
| Pin 53 | RB1 — General purpose I/O / programming |
| Pin 54 | RB2 — General purpose I/O |
| Pin 55 | RB3 — General purpose I/O |
| Pin 56 | RB4 — General purpose I/O |
| Pin 57 | RB5 — General purpose I/O |
| Pin 58 | RB6 — General purpose I/O / programming clock |
| Pin 59 | RB7 — General purpose I/O / programming data |
| Pin 60 | RB8 — General purpose I/O |
| Pin 61 | RB9 — General purpose I/O |
| Pin 62 | RB10 — General purpose I/O |
| Pin 63 | RB11 — General purpose I/O |
| Pin 64 | VSS — Ground reference |
| Pin 65 | RB12 — General purpose I/O |
| Pin 66 | RB13 — General purpose I/O |
| Pin 67 | RB14 — General purpose I/O |
| Pin 68 | RB15 — General purpose I/O |
| Pin 69 | RD8 — General purpose I/O |
| Pin 70 | RD9 — General purpose I/O |
| Pin 71 | RD10 — General purpose I/O |
| Pin 72 | RD11 — General purpose I/O |
| Pin 73 | RD13 — General purpose I/O |
| Pin 74 | RD14 — General purpose I/O |
| Pin 75 | VDD — Supply voltage (2.3V-3.6V) |
| Pin 76 | RD15 — General purpose I/O |
| Pin 77 | RE0 — General purpose I/O |
| Pin 78 | RE1 — General purpose I/O |
| Pin 79 | RE2 — General purpose I/O |
| Pin 80 | RE3 — General purpose I/O |
| Pin 81 | RE4 — General purpose I/O |
| Pin 82 | RE5 — General purpose I/O |
| Pin 83 | RE6 — General purpose I/O |
| Pin 84 | RE7 — General purpose I/O |
| Pin 85 | RG0 — General purpose I/O |
| Pin 86 | RG1 — General purpose I/O |
| Pin 87 | VSS — Ground reference |
| Pin 88 | RG2 — General purpose I/O |
| Pin 89 | RG3 — General purpose I/O |
| Pin 90 | VDD — Supply voltage (2.3V-3.6V) |
| Pin 91 | RG12 — General purpose I/O |
| Pin 92 | RG13 — General purpose I/O |
| Pin 93 | RG14 — General purpose I/O |
| Pin 94 | USBID — USB OTG ID pin |
| Pin 95 | VDD — Supply voltage (2.3V-3.6V) |
| Pin 96 | VSS — Ground reference |
| Pin 97 | D+ — USB D+ data line |
| Pin 98 | D- — USB D- data line |
| Pin 99 | VUSB — USB transceiver supply (3.3V) |
| Pin 100 | MCLR — Master clear (reset, active low) |
Typical Applications
PIC32MX664F128L-V/PF is suitable for 6 applications: Industrial Ethernet Gateway, USB Human Interface Device (HID), Embedded Web Server / IoT Node, Home Automation Controller, Point-of-Sale (POS) Terminal, USB Mass Storage / CDC Composite Device.
Industrial Ethernet Gateway
The PIC32MX664F128L-V/PF's integrated 10/100 Ethernet MAC with MII/RMII and 80 MHz MIPS M4K core make it a strong fit for industrial Ethernet gateway designs. Engineers typically pair the device with an external PHY such as the Microchip KSZ8081PE-010 to bring up Modbus TCP, EtherNet/IP, or PROFINET slave connectivity. With 32 KB SRAM and Microchip's MPLAB Harmony TCP/IP stack, the MCU comfortably handles a single TCP socket plus HTTP web server for configuration. The on-chip USB OTG further allows local configuration via CDC. Compared to MCUs without integrated MAC, this part eliminates the SPI-attached Ethernet controller and the associated PCB area, BOM cost, and SPI bandwidth ceiling.
Recommended
USB Human Interface Device (HID)
The PIC32MX664F128L-V/PF integrates a USB 2.0 OTG controller with on-chip Full-Speed and High-Speed transceiver, eliminating the need for an external USB PHY for sequencer chips. For HID-class peripherals (keyboards, mice, custom input devices), the MCU's 80 MHz core sustains polling rates up to 1000 Hz with comfortable headroom for descriptor processing. Microchip's MPLAB Harmony USB stack provides ready-made HID class drivers, cutting firmware development time. The 128 KB Flash accommodates USB stack, HID report descriptors, and application logic, while 32 KB SRAM handles endpoint buffers. The 100-TQFP package supports the full pinout required for USB D+/D- signals plus GPIO for buttons and indicators.
Recommended
Embedded Web Server / IoT Node
The PIC32MX664F128L-V/PF's combination of Ethernet MAC, ample 32 KB SRAM, and 80 MHz processing power supports a lightweight embedded HTTP/HTTPS web server for IoT node applications. Engineers can run Microchip's MPLAB Harmony TCP/IP stack with HTTP server module, exposing sensor data and configuration endpoints without external processing. For HTTPS/TLS, the smaller 128 KB Flash limits what can fit, so choose the PIC32MX795F512L-80I/PF upgrade path when security is required. The 100-TQFP provides ample GPIO for sensor interfacing (I2C, SPI, UART), and the 10-bit ADC at 1 MSps supports analog sensor acquisition. Power consumption is typically 70-90 mA active at 80 MHz, acceptable for line-powered IoT nodes.
Recommended
Home Automation Controller
The PIC32MX664F128L-V/PF suits home automation hub designs thanks to its dual connectivity (Ethernet for the backbone, USB OTG for commissioning or external storage) and 85 GPIO pins to interface with relays, sensors, and keypads. Its 80 MHz MIPS M4K core sustains Zigbee coordinator or Z-Wave host firmware alongside Ethernet, though memory constraints favor simpler RF link protocols. The 100-TQFP package and -40C to +105C temperature range handle indoor environments comfortably with margin. Engineers typically combine this MCU with a CC2530 or similar 2.4 GHz transceiver and an external EEPROM for non-volatile storage. Compared to ARM Cortex-M alternatives, the PIC32MX delivers comparable throughput and richer integrated peripherals for the price point.
Recommended
Point-of-Sale (POS) Terminal
The PIC32MX664F128L-V/PF serves as the main controller in low-volume POS terminals, with Ethernet for back-office connectivity, USB OTG for receipt printers or barcode scanners, and GPIO/NFC-ready interfaces. The MCU's 32 KB SRAM supports transaction buffering and a small TCP/IP stack, while 128 KB Flash fits firmware, security primitives, and a basic menu UI. Microchip's MPLAB Harmony crypto libraries add AES/SHA support when paired with sufficient Flash. The 100-TQFP footprint accommodates all peripheral pinouts without sacrificing board area for routing. Compared to discrete Ethernet+USB solutions, this integrated MCU reduces BOM by 1-2 ICs and simplifies EMC certification by reducing high-speed signal count.
Recommended
USB Mass Storage / CDC Composite Device
The PIC32MX664F128L-V/PF's USB 2.0 High-Speed OTG with on-chip transceiver is well suited to USB Mass Storage, CDC (virtual COM port), and composite device firmware. The 80 MHz core sustains USB High-Speed throughput while leaving cycles for file system or protocol processing, and 32 KB SRAM is sufficient for small MSD sector buffers. The MCU also pairs cleanly with SD card interfaces over SPI for removable storage. Engineers should note that 128 KB Flash is tight for full USB stack plus FAT file system; consider the PIC32MX795F512L-80I/PF upgrade for heavier firmware. The 100-TQFP keeps USB D+/D- and SD card signals on dedicated pins to ease PCB layout.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX664F128L-V/PF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX664F128LT-V/PF | PIC32MX664F128L-I/PF | PIC32MX564F128L-V/PF | PIC32MX664F064L-V/PF | PIC32MX575F512L-80I/PF | PIC32MX795F512L-80I/PF |
|---|---|---|---|---|---|---|---|
| Package | 100-TQFP (14x14 mm) | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Clock | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB (-50%) | 512 KB (+300%) | 512 KB (+300%) |
| RAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 128 KB (+300%) | 128 KB (+300%) |
| Ethernet MAC | 10/100 integrated | 10/100 integrated | 10/100 integrated | Not present | 10/100 integrated | Not present | 10/100 integrated |
| USB | USB 2.0 OTG FS/HS | USB 2.0 OTG FS/HS | USB 2.0 OTG FS/HS | USB 2.0 OTG FS/HS | USB 2.0 OTG FS/HS | USB 2.0 FS only | USB 2.0 OTG FS/HS |
| Operating Temperature | -40C to +105C (V grade) | -40C to +105C (V grade) | -40C to +85C (I grade) | -40C to +105C (V grade) | -40C to +105C (V grade) | -40C to +85C (I grade) | -40C to +85C (I grade) |
Key Differentiators
- Only variant with USB OTG HS + Ethernet + 128 KB Flash in single 100-TQFP (vs PIC32MX664F064L-V/PF)
- Integrated Ethernet MAC eliminates external controller cost (vs PIC32MX564F128L-V/PF)
- V-grade temperature range for industrial deployments (vs PIC32MX664F128L-I/PF)
- Memory headroom over lower-Flash sibling (vs PIC32MX575F512L-80I/PF)
Design Notes
Place a low-ESR 10uF ceramic capacitor within 6mm of the VCAP pin (pin 11 on the 100-TQFP) to stabilize the internal 1.8V regulator. Use X7R dielectric rated for >=10V; Y5V and Z5U dielectrics degrade with temperature and bias. Without proper VCAP decoupling, the MCU may exhibit erratic resets or fail to start up at low temperatures. The 2.3V-3.6V main supply rails should each have a 0.1uF ceramic bypass within 3mm of the VDD pins.
Route USB D+ and D- as a 90-ohm differential pair with continuous reference ground plane beneath. Keep trace length matching within 2mm to avoid USB compliance failures. The VUSB pin (pin 99) requires its own 0.1uF decoupling plus a 10uF bulk capacitor. For Ethernet, the RMII/MII signals to the external PHY must be length-matched and routed away from switching power supplies to minimize EMI coupling into the Ethernet signals.
Do not omit the MCLR pull-up resistor on pin 100; the MCLR pin requires a 10kOhm pull-up to VDD for normal operation. Programming in-circuit via ICSP requires this signal to be accessible. Also, when migrating between PIC32MX5/6/7 family variants, always re-verify the pinout for the specific device: some peripherals such as Ethernet and USB pins are not present on lower-feature parts even though they share the same package, leading to NC pins on PCB layouts.
Estimated: at maximum CPU activity (80 MHz, all peripherals active, full GPIO toggling), the device dissipates approximately 500 mW. The 100-TQFP package has a theta_JA of approximately 40 C/W (per Microchip datasheet family specification), giving a junction temperature rise of about 20C above ambient. At the +105C V-grade upper limit, ambient must stay below 85C for safe operation at full activity. For applications approaching thermal limits, spread copper pours across multiple VDD/VSS pins to share heat conduction.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - this part targets industrial/consumer markets, not automotive. For automotive-grade PIC32 options, see PIC32MX family V-grade parts or the dsPIC33 automotive family.
