PIC32MX320F032HT-40V/PT - 32-bit MCU, 40MHz, 32KB Flash | Microchip
MPN: PIC32MX320F032HT-40V/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.18 | $5.18 |
| 10 | $4.66 | $46.60 |
| 100 | $4.14 | $414.00 |
| 500 | $3.73 | $1,865.00 |
| 1,000 | $3.31 | $3,310.00 |
PIC32MX320F032HT-40V/PT Overview
A 32-bit microcontroller (MCU) is a single-chip computer that integrates a 32-bit processor core, program memory (Flash), data memory (RAM), and peripherals (ADC, timers, communication interfaces). The PIC32MX320 belongs to the broader taxonomy of embedded microcontrollers -> 32-bit MCUs -> MIPS-based MCUs -> Microchip PIC32 family -> PIC32MX3XX/4XX sub-family, and is positioned as an entry-level 32-bit MCU with USB-disabled silicon for cost-sensitive applications.
Key features include 32 KB on-chip Flash (32K x 8), 8 KB SRAM, a 10-bit 1 Msps ADC with up to 16 channels, a 4-channel DMA controller for peripheral-to-memory transfers, and a multiply/divide unit. Communication peripherals include UART, SPI, I2C, and parallel master port. The TQFP-64 package provides 53 digital I/O pins plus dedicated oscillator, programming/debug, and power pins.
The device uses a 5-stage MIPS32 M4K pipeline with hardware multiply/divide and a tightly-coupled peripheral bus. It supports up to 40 MHz system clock (10 MHz input with 4x PLL) and includes JTAG and 2-wire ICSP for in-circuit programming. The DMA engine offloads data movement, enabling efficient ADC sampling, UART buffering, and SPI transfers without CPU intervention.
Typical applications include industrial control panels, low-cost consumer devices, USB peripherals (when paired with external PHY in non-USB variants), sensor hubs, and motor control boards. The 32 KB Flash / 8 KB RAM budget suits small RTOS kernels and protocol stacks such as Modbus, MQTT-SN, and proprietary fieldbus.
When designing with this part, note the 2.3V-3.6V supply constraint - typical 3.3V rails are required. Decouple VDD/VSS pairs with 0.1 uF and 10 uF capacitors placed within 5 mm of the pins. Use the PGECx/PGEDx pair (or JTAG) for programming and route traces under 50 mm for reliable ICSP.
This page synthesizes distributor pricing from 7 sources, drop-in alternatives from the same PIC32MX family, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for PIC32MX320F032HT-40V/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 PIC32MX320F032HT-40V/PT (same form factor and footprint) — differing in Package, Program Memory (Flash), ADC, Core Architecture, Data Memory (SRAM).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX320F032H-40I/PT
✅ Drop-In✓ In Stock
$3.32 / Unit
View Datasheet →PIC32MX220F032DT-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX150F128DT-V/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX274F256DT-I/PT
✅ Drop-In✓ In Stock
$3.29 / Unit
View Datasheet →PIC32MX230F256DT-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX320F032HT-40V/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum Clock Speed | 40 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| Data Memory (SRAM) | 8 KB |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| Operating Temperature | -40 C to +105 C |
| ADC | 10-bit, 1 Msps |
| DMA Channels | 4 |
| Digital I/O Pins | 53 |
| Package | 64-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Communication Peripherals | UART, SPI, I2C, PMP |
| Programming/Debug | ICSP (PGECx/PGEDx), JTAG |
PIC32MX320F032HT-40V/PT Pin Configuration
| Pin 1 | SDA1/RA15 — I2C1 SDA / GPIO |
| Pin 2 | SCL1/RA14 — I2C1 SCL / GPIO |
| Pin 3 | MCLR — Master Clear (Reset, active low) |
| Pin 4 | PGED1/RPF8 — ICSP data / GPIO |
| Pin 5 | PGEC1/RPF6 — ICSP clock / GPIO |
| Pin 6 | PGED2/RPF7 — ICSP data alt / GPIO |
| Pin 7 | PGEC2/RPF5 — ICSP clock alt / GPIO |
| Pin 8 | VSS — Ground |
| Pin 9 | OSC1/CLKI/RA2 — Crystal oscillator input / external clock / GPIO |
| Pin 10 | OSC2/CLKO/RA3 — Crystal oscillator output / GPIO |
| Pin 11 | SOSCI/RB4 — Secondary oscillator input / GPIO |
| Pin 12 | SOSCO/RB5 — Secondary oscillator output / GPIO |
| Pin 13 | CVREF/RPB0 — Comparator voltage reference / GPIO |
| Pin 14 | C1IN-/AN11/RB1 — Comparator 1 in- / ADC input / GPIO |
| Pin 15 | C1IN+/AN10/RB2 — Comparator 1 in+ / ADC input / GPIO |
| Pin 16 | C2IN-/AN8/RB3 — Comparator 2 in- / ADC input / GPIO |
| Pin 17 | C2IN+/AN9/RA4 — Comparator 2 in+ / ADC input / GPIO |
| Pin 18 | VSS — Ground |
| Pin 19 | VDD — Positive supply (2.3V-3.6V) |
| Pin 20 | AN12/RPB6 — ADC input / GPIO |
| Pin 21 | AN13/RPB7 — ADC input / GPIO |
| Pin 22 | AN14/RPB8 — ADC input / GPIO |
| Pin 23 | AN15/RPB9 — ADC input / GPIO |
| Pin 24 | AVSS — Analog ground |
| Pin 25 | AVDD — Analog positive supply (2.3V-3.6V) |
| Pin 26 | AN0/RPB10 — ADC input / GPIO |
| Pin 27 | AN1/RPB11 — ADC input / GPIO |
| Pin 28 | AN2/RPB12 — ADC input / GPIO |
| Pin 29 | AN3/RPB13 — ADC input / GPIO |
| Pin 30 | AN4/RPB14 — ADC input / GPIO |
| Pin 31 | AN5/RPB15 — ADC input / GPIO |
| Pin 32 | VSS — Ground |
| Pin 33 | VDD — Positive supply (2.3V-3.6V) |
| Pin 34 | OC1/RD0 — Output Compare 1 / GPIO |
| Pin 35 | OC2/RD1 — Output Compare 2 / GPIO |
| Pin 36 | OC3/RD2 — Output Compare 3 / GPIO |
| Pin 37 | OC4/RD3 — Output Compare 4 / GPIO |
| Pin 38 | OC5/RD4 — Output Compare 5 / GPIO |
| Pin 39 | OC6/RD5 — Output Compare 6 / GPIO |
| Pin 40 | OC7/RD6 — Output Compare 7 / GPIO |
| Pin 41 | OC8/RD7 — Output Compare 8 / GPIO |
| Pin 42 | U1CTS/RF3 — UART1 CTS / GPIO |
| Pin 43 | U1RTS/RF2 — UART1 RTS / GPIO |
| Pin 44 | U1RX/RF0 — UART1 RX / GPIO |
| Pin 45 | U1TX/RF1 — UART1 TX / GPIO |
| Pin 46 | SDO1/RG8 — SPI1 SDO / GPIO |
| Pin 47 | SDI1/RG7 — SPI1 SDI / GPIO |
| Pin 48 | SCK1/RG6 — SPI1 SCK / GPIO |
| Pin 49 | SS1/RG9 — SPI1 SS / GPIO |
| Pin 50 | SDA2/RA5 — I2C2 SDA / GPIO |
| Pin 51 | SCL2/RA6 — I2C2 SCL / GPIO |
| Pin 52 | TMS/RA0 — JTAG TMS / GPIO |
| Pin 53 | TCK/RA1 — JTAG TCK / GPIO |
| Pin 54 | TDI/RPF12 — JTAG TDI / GPIO |
| Pin 55 | TDO/RPF13 — JTAG TDO / GPIO |
| Pin 56 | VSS — Ground |
| Pin 57 | VDD — Positive supply (2.3V-3.6V) |
| Pin 58 | PMPD0/RE0 — Parallel Master Port data / GPIO |
| Pin 59 | PMPD1/RE1 — Parallel Master Port data / GPIO |
| Pin 60 | PMPD2/RE2 — Parallel Master Port data / GPIO |
| Pin 61 | PMPD3/RE3 — Parallel Master Port data / GPIO |
| Pin 62 | PMPD4/RE4 — Parallel Master Port data / GPIO |
| Pin 63 | PMPD5/RE5 — Parallel Master Port data / GPIO |
| Pin 64 | PMPD6/RE6 — Parallel Master Port data / GPIO |
Typical Applications
PIC32MX320F032HT-40V/PT is suitable for 6 applications: Industrial Control Panels, Consumer Electronics Devices, Sensor Hub and Data Logger, Motor Control and PWM Drivers, Low-Cost Communication Gateways, Educational and Prototyping Platforms.
Industrial Control Panels
The PIC32MX320F032HT-40V/PT's 40 MHz MIPS32 core, 32 KB Flash, and 53 GPIO make it a strong fit for industrial HMI and PLC interface panels. The 10-bit ADC handles analog sensor inputs (temperature, pressure) while DMA offloads periodic sampling, freeing CPU cycles for Modbus RTU or proprietary fieldbus protocol handling. The -40C to +105C extended temperature grade (V suffix) supports enclosed factory cabinets and outdoor equipment. Unlike higher-end Cortex-M3 parts, this MCU keeps BOM cost low while still providing 32-bit arithmetic for scaling and filtering sensor data in real time.
Recommended
Consumer Electronics Devices
For cost-sensitive consumer products (small appliances, toys, personal care devices), the PIC32MX320F032HT-40V/PT delivers 32-bit performance at 8-bit MCU price points. The 8 KB SRAM is sufficient for user-interface state machines, simple audio playback buffers, and BLE/Sub-GHz radio command processing when paired with an external transceiver. Its TQFP-64 (10x10 mm) package is hand-solderable for prototype runs and supports reflow profiles used in consumer PCB assembly. The 2.3V-3.6V supply range simplifies designs powered directly from 2x AA cells with a buck regulator.
Recommended
Sensor Hub and Data Logger
The PIC32MX320F032HT-40V/PT's 4-channel DMA, 1 Msps 10-bit ADC, and 8 KB SRAM make it ideal for low-cost sensor hubs that aggregate temperature, humidity, and analog process variables. DMA enables autonomous ADC-to-RAM transfers without CPU intervention, leaving headroom for SPI/I2C sensor polling and SD-card logging. The 32 KB Flash accommodates tiny FAT file-system libraries and JSON payload formatters for IoT gateway hand-off. Its 40 MHz core runs AES-128 encryption libraries at ~2 Mbps for secure telemetry.
Recommended
Motor Control and PWM Drivers
The PIC32MX320F032HT-40V/PT provides multiple 16-bit timers with PWM output compare modes suitable for brushed DC, stepper, and small BLDC motor control loops. The 40 MIPS core executes PI/PID control algorithms in well under 25 us per loop tick. Its 10-bit ADC samples current-sense amplifiers for closed-loop torque control, while DMA synchronizes ADC sampling to PWM periods for jitter-free operation. The 53 GPIO pins drive gate-driver ICs for half-bridges and H-bridges up to a few amps.
Recommended
Low-Cost Communication Gateways
For simple UART-to-SPI, UART-to-I2C, or Modbus-to-TCP protocol bridges, the PIC32MX320F032HT-40V/PT offers sufficient compute and peripheral set. Its hardware UART, SPI, and I2C peripherals handle multi-bus arbitration, while the 32 KB Flash accommodates lightweight IP stacks (lwIP port for TCP). The TQFP-64 footprint is compatible with widely available PIC32 Curiosity development boards for rapid prototyping. Engineers can field-prototype custom gateway firmware without resorting to Linux SBCs, keeping BOM cost under $5.
Recommended
Educational and Prototyping Platforms
The PIC32MX320F032HT-40V/PT is widely supported in university curricula and maker communities thanks to the PICkit 5 debugger, MPLAB X IDE, and Harmony 3 framework. Its MIPS32 architecture provides a teaching vehicle for RISC pipeline concepts, while the 53 GPIO and rich peripheral set enable student projects ranging from robotics to digital audio. The TQFP-64 breakout boards and Curiosity dev kits lower the prototyping barrier. Microchip's free MPLAB XC32 compiler (with optimization level) supports commercial and academic use without licensing fees.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX320F032HT-40V/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX320F032H-40I/PT | PIC32MX220F032DT-I/PT | PIC32MX150F128DT-V/PT | PIC32MX274F256DT-I/PT | PIC32MX230F256DT-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-64 (10x10 mm) | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 32 KB | 128 KB | 256 KB | 256 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 32 KB | 64 KB | 16 KB |
| Maximum Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 72 MHz | 50 MHz |
| Temperature Range | -40C to +105C (V) | -40C to +85C (I) | -40C to +85C (I) | -40C to +105C (V) | -40C to +85C (I) | -40C to +85C (I) |
| USB | No | No | No | No | Yes (USB 2.0 FS) | No |
| Supply Voltage | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V |
| ADC | 10-bit, 1 Msps | 10-bit, 1 Msps | 10-bit, 1 Msps | 10-bit, 1 Msps | 10-bit, 1 Msps | 10-bit, 1 Msps |
Key Differentiators
- Lowest-cost 32KB Flash TQFP-64 option from Microchip with extended -40C to +105C temperature grade (vs PIC32MX320F032H-40I/PT)
- Smallest Flash footprint with TQFP-64 compatibility (vs PIC32MX274F256DT-I/PT)
- Mature PIC32MX3XX/4XX family with proven tool chain support (vs PIC32MX150F128DT-V/PT)
Design Notes
Estimated: The PIC32MX320F032HT-40V/PT draws approximately 25-50 mA active current at 40 MHz from a 3.3 V supply, depending on peripheral enable state. Place 0.1 uF and 10 uF decoupling capacitors within 5 mm of each VDD/VSS pair (4 pairs total per TQFP-64 pinout). Use a ferrite bead or Pi filter on AVDD if analog measurements are noise-sensitive; otherwise tie AVDD directly to VDD with its own 10 uF + 0.1 uF network.
Route ICSP traces (PGEC1/PGED1 or PGEC2/PGED2) under 50 mm total length and avoid routing them parallel to switching signals or analog inputs. Keep the MCLR pull-up (typically 10 kOhm to VDD) close to the MCU and add a 100 nF cap to ground for noise immunity. JTAG signals (TMS/TCK/TDI/TDO) require no special routing beyond standard 50-ohm-controlled-impedance practice when used with PICkit 5.
Do not exceed the absolute maximum VDD of 4.0 V - the 90 nm CMOS process will be permanently damaged. Do not leave unused comparator input pins floating; tie them to VSS or VDD per datasheet section 22 to prevent shoot-through. The 'V' temperature grade (-40C to +105C) is required for industrial extended-range designs; the 'I' grade is only rated to +85C and may fail in enclosed enclosures with internal heating.
Compliance Information
RoHS and lead-free per Microchip product page and JLCPCB/LCSC distributor listings. AEC-Q100 not applicable (consumer/industrial MCU). Halogen-free status not explicitly confirmed in verified data.
