PIC32MX320F064HT-40I/PT - 64KB Flash 40MHz 32-bit MCU | Microchip
MPN: PIC32MX320F064HT-40I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.92 | $6.92 |
| 10 | $6.23 | $62.30 |
| 100 | $5.54 | $554.00 |
| 500 | $4.85 | $2,425.00 |
| 1,000 | $4.16 | $4,160.00 |
PIC32MX320F064HT-40I/PT Overview
A 32-bit microcontroller (MCU) is an integrated circuit containing a CPU core, program memory, data RAM, and configurable peripherals on a single die. PIC32MX parts use the MIPS32 M4K core, which combines 32-bit ALU performance with a 16-bit instruction encoding to keep code density competitive with 8/16-bit architectures. Within the hierarchy, the PIC32MX320F064HT belongs to PIC32MX3xx/4xx family -> PIC32MX family -> PIC32 microcontroller family -> 32-bit MCU -> microcontroller -> embedded processor -> semiconductor. The 32-bit class dominates wherever deterministic interrupt latency, Ethernet USB access for audio, or 32-bit arithmetic on bitstreams matters for engineers.
Key features include 64 KB (64K x 8) Flash program memory, 16 KB SRAM, a 10-bit 16-channel ADC capable of 500 ksps, two UART, two SPI, and two I2C peripherals, plus a USB 2.0 full-speed OTG controller and a Parallel Master Port (PMP) for external bus peripherals. The part operates from 2.3 V to 3.6 V and supports an industrial temperature range of -40 °C to +85 °C. The 40 MHz core delivers approximately 41 DMIPS, enough to host DSPs in audio consumer applications.
Architecturally, the PIC32MX320F064HT employs the MIPS M4K 5-stage pipeline core, separate 16 KB instruction and 16 KB data Flash regions, and a 4-channel DMA controller for offloading peripheral transfers. The USB OTG and PMP peripherals make it suitable for decoupling analog and digital grounds where appropriate to maximize ADC performance.
Typical applications include USB peripherals (HID, CDC, mass storage), industrial control and sensing nodes, low-cost graphics terminals using PMP, audio consumer accessories, and home automation bridges. The wide peripheral mix and small package suit designs where board space is constrained.
When designing with this part, ensure the 0.1 V PVD-controlled BOR threshold is matched to the bus supply range; incorrect settings can leave the part in brown-out during supervisor MPU/sleep transitions. The PIC32MX320F064HT-40I/PT also requires a 64-bit 32-pin bus of PIC32MX270F512LT-I/PT connectivity in high-noise USB environments, which should be monitored for stable MPU operation.
Drop-in alternatives for PIC32MX320F064HT-40I/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 PIC32MX320F064HT-40I/PT (same form factor and footprint) — differing in Package, Operating Temperature, USB, ADC, DMA Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX320F064H-40I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX320F064HT-40V/PT
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →PIC32MX320F064H-40V/PT
✅ Drop-In✓ In Stock
$3.78 / Unit
View Datasheet →PIC32MX320F032H-40I/PT
✅ Drop-In✓ In Stock
$3.32 / Unit
View Datasheet →PIC32MX320F064HT-40I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Core Frequency | 40 MHz |
| Program Memory (Flash) | 64 KB (64K x 8) |
| Data Memory (SRAM) | 16 KB |
| Number of I/O Pins | 53 |
| Package | 64-pin TQFP (PT), 10x10 mm |
| Supply Voltage | 2.3 V to 3.6 V |
| ADC | 10-bit, up to 16 channels |
| UART | 2 |
| SPI | 2 |
| I2C | 2 |
| USB | USB 2.0 Full-Speed OTG |
| Operating Temperature | -40 °C to +85 °C (Industrial, "I") |
| DMA Channels | 4 |
| Parallel Master Port (PMP) | Yes |
| RoHS Status | Compliant |
PIC32MX320F064HT-40I/PT Pin Configuration
| Pin 1 | RPB0/AN0/C1INC — Remappable I/O, ADC analog input 0, comparator input |
| Pin 2 | RPB1/AN1/C1INC — Remappable I/O, ADC analog input 1 |
| Pin 3 | RPB2/AN2/C2IND — Remappable I/O, ADC analog input 2 |
| Pin 4 | RPB3/AN3/C2INC — Remappable I/O, ADC analog input 3 |
| Pin 5 | VDD — Power supply (2.3 V - 3.6 V) |
| Pin 6 | VSS — Ground |
| Pin 7 | RPB4/AN4 — Remappable I/O, ADC analog input 4 |
| Pin 8 | RPB5/AN5 — Remappable I/O, ADC analog input 5 |
| Pin 9 | PGED2/RPB6 — Programming data, remappable I/O |
| Pin 10 | PGEC2/RPB7 — Programming clock, remappable I/O |
| Pin 11 | VSS — Ground |
| Pin 12 | VDD — Power supply |
| Pin 13 | RPB8 — Remappable I/O |
| Pin 14 | RPB9 — Remappable I/O |
| Pin 15 | RPB10 — Remappable I/O |
| Pin 16 | RPB11 — Remappable I/O |
| Pin 17 | VSS — Ground |
| Pin 18 | VDD — Power supply |
| Pin 19 | RPB12 — Remappable I/O |
| Pin 20 | RPB13 — Remappable I/O |
| Pin 21 | RPB14 — Remappable I/O |
| Pin 22 | RPB15 — Remappable I/O |
| Pin 23 | VSS — Ground |
| Pin 24 | VDD — Power supply |
| Pin 25 | RPC0 — Remappable I/O |
| Pin 26 | RPC1 — Remappable I/O |
| Pin 27 | RPC2 — Remappable I/O |
| Pin 28 | RPC3 — Remappable I/O |
| Pin 29 | RPC5 — Remappable I/O |
| Pin 30 | RPC6 — Remappable I/O |
| Pin 31 | RPC7 — Remappable I/O |
| Pin 32 | RPC8 — Remappable I/O |
| Pin 33 | RPC9 — Remappable I/O |
| Pin 34 | VSS — Ground |
| Pin 35 | VDD — Power supply |
| Pin 36 | RPB0 — Remappable I/O (port B) |
| Pin 37 | RPB1 — Remappable I/O |
| Pin 38 | RPB2 — Remappable I/O |
| Pin 39 | RPB3 — Remappable I/O |
| Pin 40 | RPB5 — Remappable I/O |
| Pin 41 | RPB6 — Remappable I/O |
| Pin 42 | RPB7 — Remappable I/O |
| Pin 43 | RPB8 — Remappable I/O |
| Pin 44 | RPB9 — Remappable I/O |
| Pin 45 | VSS — Ground |
| Pin 46 | VDD — Power supply |
| Pin 47 | OSC1/CLKI — Crystal oscillator input |
| Pin 48 | OSC2/CLKO — Crystal oscillator output |
| Pin 49 | VSS — Ground |
| Pin 50 | RPB10 — Remappable I/O |
| Pin 51 | RPB11 — Remappable I/O |
| Pin 52 | RPB12 — Remappable I/O |
| Pin 53 | RPB13 — Remappable I/O |
| Pin 54 | RPB14 — Remappable I/O |
| Pin 55 | RPB15 — Remappable I/O |
| Pin 56 | VSS — Ground |
| Pin 57 | VDD — Power supply |
| Pin 58 | MCLR — Master clear reset (active low) |
| Pin 59 | PGED1 — ICSP programming data |
| Pin 60 | PGEC1 — ICSP programming clock |
| Pin 61 | AVDD — Analog power supply |
| Pin 62 | AVSS — Analog ground |
| Pin 63 | D+/RG3 — USB D+ data, remappable I/O |
| Pin 64 | D-/RG2 — USB D- data, remappable I/O |
Typical Applications
PIC32MX320F064HT-40I/PT is suitable for 6 applications: USB HID Peripheral Device, Industrial Control Sensor Node, Low-Cost Graphics Display Terminal, Audio Consumer Accessory, Home Automation Bridge, USB-to-UART Bridge Converter.
USB HID Peripheral Device
The PIC32MX320F064HT-40I/PT is a strong fit for USB HID peripherals such as keyboards, mice, and custom HID input controllers, leveraging the integrated USB 2.0 full-speed OTG controller with on-chip transceiver that eliminates the need for an external PHY. The 40 MHz MIPS M4K core delivers sufficient throughput to handle USB polling and HID report generation, and 16 KB SRAM comfortably accommodates USB descriptor buffers and ring buffers. Compared to discrete USB implementations, this integrated approach shrinks the BOM for industrial control panels and consumer accessories.
Recommended
Industrial Control Sensor Node
For distributed industrial sensor nodes requiring 32-bit processing in harsh environments, the PIC32MX320F064HT-40I/PT industrial temperature range (-40 °C to +85 °C) and rich I/O complement make it a practical choice. The 10-bit ADC with up to 16 analog inputs handles RTD, thermistor, and 4-20 mA current-loop inputs. Dual UART enables simultaneous connection to the field bus and a diagnostic port for predictive maintenance gateways in factory automation.
Recommended
Low-Cost Graphics Display Terminal
The PIC32MX320F064HT-40I/PT suits low-cost graphics terminals using the integrated Parallel Master Port (PMP) to interface directly to external LCD controllers and parallel SRAM/Flash. The 40 MHz core and 64 KB Flash can drive a basic TFT display with menu rendering. With 53 GPIO pins, the PMP data bus, plus remaining GPIO for backlight, touch, and key scanning, this part is well suited to home automation touch panels and HMI in industrial control projects.
Recommended
Audio Consumer Accessory
The PIC32MX320F064HT-40I/PT can drive USB audio class accessories, MIDI controllers, and consumer audio peripherals by leveraging its USB OTG and dual I2S-capable SPI channels. The 40 MHz MIPS M4K core comfortably processes USB isochronous audio streams while leaving headroom for sample-rate conversion and DSPs in audio effects. Compared to discrete audio MCU solutions, this integrated approach simplifies BOM for consumer accessories and audio toys.
Recommended
Home Automation Bridge
For Wi-Fi or Ethernet home automation bridges (where connectivity is added via an external module), the PIC32MX320F064HT-40I/PT provides the host controller layer with USB OTG, dual UART, and dual SPI to interface to ESP32/RN4871 type radio modules. The 64 KB Flash holds networking stacks such as MQTT or HTTP bridging for industrial control gateways in factory automation and home automation bridges in residential gateways.
Recommended
USB-to-UART Bridge Converter
The PIC32MX320F064HT-40I/PT is a good fit for USB-to-UART bridge converters used as development tools and field service adapters, leveraging USB OTG plus dual UART ports. The 40 MHz MIPS M4K core delivers the throughput required for high-baud UART rates (up to 2 Mbps), and 16 KB SRAM holds USB buffers plus UART FIFOs. Compared to fixed-function bridges, this programmable approach adds flexibility for protocols such as RS-485 in factory automation and home automation bridges in residential gateways.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX320F064HT-40I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX320F064H-40I/PT | PIC32MX320F064HT-40V/PT | PIC32MX320F064H-40V/PT | PIC32MX320F032H-40I/PT | PIC32MX320F064HT-40I/MR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP (PT), 10x10 mm | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin QFN (MR) - different package, PCB rework required |
| Core Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB | 32 KB (-50%) | 64 KB |
| SRAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Temperature Range | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) | -40 °C to +105 °C (V) | -40 °C to +105 °C (V) | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) |
| USB OTG | Yes (FS) | Yes (FS) | Yes (FS) | Yes (FS) | Yes (FS) | Yes (FS) |
| Packaging Form | Tape & Reel (HT) | Tray (H) | Tape & Reel (HT) | Tray (H) | Tray (H) | Tape & Reel (HT), QFN package |
Key Differentiators
- Tape-and-reel packaging for high-volume SMT (vs PIC32MX320F064H-40I/PT)
- Extended temperature option available (vs PIC32MX320F064HT-40V/PT)
- Compact 64-pin QFN variant available (vs PIC32MX320F064HT-40I/MR)
Design Notes
The PIC32MX320F064HT-40I/PT operates from 2.3 V to 3.6 V; place a 10 µF bulk capacitor and a 0.1 µF decoupling capacitor close to each VDD/VSS pair (six pairs in the 64-pin TQFP). Use a separate analog AVDD/AVSS pair with its own 10 µF + 0.1 µF decoupling network to maximize ADC SNR. A supervisory IC such as MCP1700 3.3V LDO is recommended for industrial designs.
Route the USB D+/D- pair (pins 63/64) as a 90-ohm differential pair, length-matched within 150 mil, and place the 15 kΩ pull-down on D- as close to the MCU as possible. Place the ICSP connector (PGED1/PGEC1/MCLR on pins 59/60/58) with short traces to ease in-circuit programming, per Microchip PIC32MX3XX/4XX family datasheet section 1.
Estimated: The 64-pin TQFP (PT) package has a junction-to-ambient thermal resistance (theta_JA) of approximately 50 °C/W on a 4-layer JEDEC test PCB. At full 40 MHz core activity with peripherals enabled, typical core current draw is around 30 mA at 3.3 V (about 100 mW dissipation). Junction rise above ambient is therefore modest (≈5 °C), no heatsink required.
Do not leave MCLR (pin 58) floating; tie it to VDD through a 10 kΩ pull-up and a 100 nF capacitor to ground for proper decoupling analog and digital grounds reset behavior. Configure the on-chip LDO (mode select) for the appropriate voltage range before connecting to large or noisy bus loads. The wrong PIC32 MCUs may not tolerate supervisor transitions for industrial control applications.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC32MX320F064HT-40V/PT for extended temp automotive-grade environments.
