PIC32MX764F128LT-I/BG - 32-bit 80MHz MCU, 128KB Flash, USB/CAN/ETH | Microchip
MPN: PIC32MX764F128LT-I/BG ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $8.92 | $89.20 |
| 100 | $7.65 | $765.00 |
| 500 | $6.48 | $3,240.00 |
| 1,000 | $5.42 | $5,420.00 |
PIC32MX764F128LT-I/BG Overview
A 32-bit microcontroller (MCU) is an integrated circuit that combines a high-performance processor core, program memory (Flash), data memory (SRAM), and a rich set of on-chip peripherals. PIC32MX5/6/7 devices sit within the broader microcontroller hierarchy: MCU -> 32-bit MCU -> MIPS-based MCU -> PIC32MX family -> industrial/connectivity segment. This taxonomy matters because the PIC32MX764F128LT-I/BG targets the embedded-connectivity sub-tree, combining deterministic real-time control with wired networking stacks that 8-bit and 16-bit MCUs cannot host efficiently.
Key features of the PIC32MX764F128LT-I/BG include an 80 MHz core with 1.56 DMIPS/MHz, 128 KB single-cycle-access Flash with prefetch cache to hide flash latency, 32 KB SRAM, four DMA channels for peripheral-to-memory transfers without CPU intervention, and a 16-bit Parallel Master Port (PMP) for external bus expansion. Communication peripherals include USB 2.0 full-speed On-The-Go, CAN 2.0b, 10/100 Mbps Ethernet MAC with MII/RMII interfaces, four UARTs, three SPI/I2S interfaces, and two I2C buses. The industrial -40C to +85C operating range suits factory and outdoor enclosures.
The PIC32MX764F128LT uses the MIPS M4K 32-bit RISC core with 5-stage pipeline and hardware multiply/divide. A Flash prefetch module plus 16-bit prefetch cache provide zero-wait-state execution from Flash under most code-flow patterns, helping the 80 MHz core sustain close to its theoretical throughput despite the slow Flash access time typical of embedded Flash processes. The peripheral DMA engine is an architectural advantage: high-bandwidth streams (Ethernet, USB, ADC) move data autonomously, freeing the CPU for protocol and application logic.
Typical applications include industrial Ethernet gateways, factory-automation PLCs, building-automation controllers, USB-to-UART bridges, CAN-based motor-control nodes, and embedded web servers. Engineers select this device when the application needs simultaneous Ethernet + CAN + USB connectivity without an external PHY-rich companion IC, plus enough Flash for TCP/IP stacks such as Microchip's MPLAB Harmony Net.
When designing with this device, ensure that the TFBGA-121 footprint is layout-friendly - the 0.8 mm ball pitch requires laser-drilled or fine-pitch PCBs and proper microvia stackups. Designers must plan supply decoupling around each VDD/VSS pair as documented in the datasheet, and use the MPLAB X IDE plus Harmony framework for firmware development.
This page synthesizes current distributor pricing, drop-in Microchip same-family alternatives, and practical layout/thermal notes not consolidated on any single manufacturer page.
Drop-in alternatives for PIC32MX764F128LT-I/BG — 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 PIC32MX764F128LT-I/BG (same form factor and footprint) — differing in ADC, Package, Timers, USB, DMA Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX764F128L-I/BG
✅ Drop-In✓ In Stock
$6.8 / Unit
View Datasheet →PIC32MX764F128HT-V/MR
✅ Drop-In✓ In Stock
$4.75 / Unit
View Datasheet →PIC32MX695F512L-80I/BG
✅ Drop-In✓ In Stock
$14.85 / Unit
View Datasheet →PIC32MX675F512L-80I/BG
✅ Drop-In✓ In Stock
$8.2 / Unit
View Datasheet →PIC32MX564F128L-I/BG
✅ Drop-In✓ In Stock
$5.7 / Unit
View Datasheet →PIC32MX764F128LT-I/BG Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K (32-bit RISC) |
| CPU Frequency | 80 MHz |
| Performance | 1.56 DMIPS/MHz |
| Program Flash Memory | 128 KB (128K x 8) |
| SRAM | 32 KB (32K x 8) |
| Number of I/O Pins | 53 |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| DMA Channels | 4 |
| USB | USB 2.0 Full-Speed + OTG |
| CAN | CAN 2.0b |
| Ethernet | 10/100 Mbps MAC (MII/RMII) |
| UART | 4 |
| SPI | 3 (with I2S) |
| I2C | 2 |
| Parallel Master Port | 16-bit PMP |
| Timers | 5 (16-bit) |
| ADC | 16-channel 10-bit, 1 Msps |
| Package | 121-TFBGA (10x10 mm, 0.8 mm pitch) |
| Operating Temperature | -40C to +85C (Industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC32MX764F128LT-I/BG 121-tfbga (10x10 mm, 0.8 mm pitch) Pin Configuration Guide
Pin configuration for PIC32MX764F128LT-I/BG (121-tfbga (10x10 mm, 0.8 mm pitch) 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 PIC32MX764F128LT-I/BG.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX764F128LT-I/BG is suitable for 7 applications: Industrial Ethernet Gateway, Building Automation Controller, USB-to-UART / USB-to-CAN Bridge, Embedded Web Server / IoT Node, CAN-Based Motor-Control Node, Data-Acquisition Front-End with Ethernet, Automotive Diagnostic Interface (non-AEC-Q100).
Industrial Ethernet Gateway
The PIC32MX764F128LT-I/BG's integrated 10/100 Ethernet MAC plus 80 MHz MIPS core makes it well suited for industrial Ethernet-to-serial gateways bridging Modbus TCP, EtherNet/IP, or PROFINET to RS-485 fieldbuses. With 128 KB Flash and 32 KB SRAM it runs Microchip's MPLAB Harmony TCP/IP stack while leaving room for application logic. The four DMA channels offload Ethernet packet movement so the CPU stays free for protocol parsing. The 121-TFBGA package supports the -40C to +85C industrial temperature range required for factory-floor enclosures.
Recommended
Building Automation Controller
The PIC32MX764F128LT-I/BG is a strong fit for BACnet or KNX building-automation controllers because it carries CAN 2.0b plus Ethernet plus USB-OTG on-chip, eliminating external PHY-rich companion ICs. Its 80 MHz core can execute a BACnet/IP stack plus scheduling logic within the 128 KB Flash budget. The 53 GPIO pins drive relays, triacs, and 0-10 V dimming outputs without external I/O expanders. Industrial -40C to +85C operation tolerates rooftop and basement enclosures.
Recommended
USB-to-UART / USB-to-CAN Bridge
The PIC32MX764F128LT-I/BG's USB 2.0 full-speed OTG plus CAN 2.0b plus four UARTs make it a versatile industrial bridge controller. It can present a CDC-ACM USB device on one side and either a CAN bus or RS-485/RS-232 on the other, with all DMA-driven. The 32 KB SRAM buffers USB and CAN traffic without CPU intervention, and 128 KB Flash holds USB descriptors plus the CDC/CAN state machines. Designers use the PIC32 USB stack from MPLAB Harmony to shorten firmware development.
Recommended
Embedded Web Server / IoT Node
The PIC32MX764F128LT-I/BG can host a lightweight HTTP server with REST endpoints for sensor data, using the integrated Ethernet MAC plus the 80 MHz CPU. The 128 KB Flash fits Microchip's Harmony Net HTTP server demo, and 32 KB SRAM holds TCP socket buffers. The four DMA channels keep Ethernet throughput high while the CPU services application logic. Industrial temperature support lets the node sit in unheated outdoor enclosures.
Recommended
CAN-Based Motor-Control Node
For CANopen or DeviceNet motor-drive peripherals, the PIC32MX764F128LT-I/BG's CAN 2.0b interface and five 16-bit timers support PWM generation plus CANopen state-machine handling. The 53 GPIO pins drive gate drivers, Hall sensors, and QEI inputs. The 80 MHz core sustains 1.56 DMIPS/MHz, sufficient for torque-loop math at low PWM frequencies. Industrial -40C to +85C operation handles drive-cabinet ambient temperatures.
Recommended
Data-Acquisition Front-End with Ethernet
The PIC32MX764F128LT-I/BG's 16-channel 10-bit 1 Msps ADC plus Ethernet MAC lets it digitize analog signals and stream samples over TCP/IP. The four DMA channels pump ADC conversions directly into SRAM buffers, offloading the CPU. 128 KB Flash fits the TCP/IP stack plus calibration tables. The 121-TFBGA package is suitable for high-density DAQ boards where analog and digital grounds can be carefully partitioned under the BGA.
Recommended
Automotive Diagnostic Interface (non-AEC-Q100)
For non-safety automotive diagnostic tools (OBD-II scan tools, factory programming fixtures), the PIC32MX764F128LT-I/BG offers USB 2.0 OTG plus CAN 2.0b in a single chip. Its 80 MHz core and 32 KB SRAM can run a CAN/K-Line stack plus a USB CDC device. Note that the 'I' industrial grade is -40C to +85C, not AEC-Q100, so this device is for off-vehicle service tools, not in-vehicle ECUs. Designers needing AEC-Q100 should pick a different MCU.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX764F128LT-I/BG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX764F128L-I/BG | PIC32MX695F512L-80I/BG | PIC32MX675F512L-80I/BG | PIC32MX564F128L-I/BG |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 121-TFBGA (10x10 mm) | 121-TFBGA (10x10 mm) - same | 121-TFBGA (10x10 mm) - same | 121-TFBGA (10x10 mm) - same | 121-TFBGA (10x10 mm) - same |
| Flash Memory | 128 KB | 128 KB | 512 KB | 512 KB | 128 KB |
| SRAM | 32 KB | 32 KB | 128 KB | 64 KB | 32 KB |
| CPU Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| USB 2.0 OTG | Yes | Yes | Yes | No | No |
| CAN 2.0b | Yes | Yes | Yes | Yes | Yes |
| Ethernet MAC | 10/100 Mbps (MII/RMII) | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | No |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Key Differentiators
- Triple on-chip wired connectivity (USB+CAN+ETH) (vs PIC32MX564F128L-I/BG)
- Best price-per-Flash with full wired stack (vs PIC32MX695F512L-80I/BG)
- Same-footprint migration path within family (vs PIC32MX675F512L-80I/BG)
Design Notes
The 121-TFBGA package uses a 0.8 mm ball pitch, which demands a PCB with laser-drilled microvias or fine-pitch via-in-pad stackups. Standard 4-layer FR-4 with 0.2 mm via drill and 0.4 mm pad is generally workable but requires tight design-rule checks. Plan a continuous ground plane beneath the BGA to provide a low-impedance return path for the high-speed Ethernet and USB signals. Route MII/RMII traces as length-matched 50 ohm single-ended pairs and keep them away from the ADC analog inputs.
Place one 100 nF ceramic decoupling capacitor on each VDD/VSS pair as close as possible to the balls. Add a single 10 uF tantalum or ceramic bulk capacitor near the package supply pin to supply the transient current peaks when Ethernet and USB transmit simultaneously. The internal 1.2 V regulator needs a 4.7 uF capacitor on the VDDcore pin per the datasheet. Poor decoupling is the most common cause of unstable Ethernet PHY link on this device.
Estimated: at 80 MHz with all peripherals active and Ethernet+USB transmitting, core current is approximately 70 mA from VDD (3.3 V), giving about 230 mW dissipation. The TFBGA-121 theta_JA is roughly 25 C/W on a 4-layer PCB, so junction temperature rise above ambient is about 5-6 C. This is well within the 85 C industrial limit; no heatsink is required. However, designers should still measure the PCB temperature under worst-case load to confirm margin.
Do not assume the PIC32MX764F128LT-I/BG is AEC-Q100 qualified - it is industrial grade only and is NOT suitable for in-vehicle ECUs. When migrating firmware between PIC32MX5/6/7 variants, double-check the peripheral count: some variants drop USB-OTG or Ethernet. Always define the configuration bits in code (DEVCFG0/1/2/3) before any code execution; missing configuration bits leave the device in a default state and can lock out debugging.
Compliance Information
RoHS compliant per Microchip product page. 'I' suffix is industrial grade -40C to +85C, NOT AEC-Q100. For AEC-Q100 automotive parts look at PIC32MX1xxx/2xxx families.