PIC32MX420F032HT-40V/PT - 32-bit MCU 32KB Flash USB-OTG | Microchip
MPN: PIC32MX420F032HT-40V/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.1 | $41.00 |
| 100 | $3.59 | $359.00 |
| 500 | $3.18 | $1,590.00 |
| 1,000 | $2.79 | $2,790.00 |
PIC32MX420F032HT-40V/PT Overview
Background: A microcontroller unit (MCU) is a single-chip computer that integrates a CPU core, memory (Flash + SRAM), and programmable peripherals (ADC, timers, communication interfaces) on one die. The PIC32MX420 uses a MIPS32 M4K core, a 32-bit RISC architecture licensed by MIPS that delivers 1.56 DMIPS/MHz, paired with Microchip's PIC peripherals. Within the broader taxonomy, this part sits at: 32-bit MCU -> MIPS microcontroller -> PIC32 family -> PIC32MX4xx sub-family -> integrated peripherals power management IC. This same-Family positioning explains why it pairs naturally with PIC32MX3xx, PIC32MX1xx/2xx, and PIC24/dsPIC parts.
Key features include a full-speed USB-OTG transceiver with on-chip pull-up/pull-down control, a 16-channel 10-bit ADC with 1 Msps conversion rate, two I2C, two SPI, and two UART interfaces, five 16-bit timers/counters, an RTCC, and a 4-channel DMA controller for offloading CPU data movement. The 'H' suffix denotes 64-pin TQFP, the 'T' denotes tape and reel, the '40V' indicates 40 MHz speed grade and the V (extended, -40C to +105C) operating temperature range.
Architecturally, the PIC32MX420 separates the MIPS core and a peripheral bus clocked at peripheral bus frequency, with peripheral pin select (PPS) enabling flexible peripheral-to-pin routing on higher-pin-count packages. The DMA controller can service the ADC, UART/SPI/I2C, and timers, which is particularly useful for sustained audio/USB throughput without CPU intervention. The 10-bit 1 Msps ADC combined with the 40 MHz MIPS core makes the part well-suited to real-time sensing loops.
Typical applications include USB peripherals (HID, CDC, MSD, audio class), small graphical user interfaces via PMP/parallel master port, motor control BLDC/PMSM drives, industrial control front-ends, sensor hubs, and portable test instruments that demand deterministic CPU performance with on-chip full-speed USB.
Design consideration: the USB-OTG pins require an internal pull-up selected in software; an external 1.5 kohm pull-up is only needed when using the bus-powered device mode without internal pull-ups enabled. Decoupling the 3.3V rail with a 100 nF ceramic at each VDD/VSS pair and a bulk 4.7 uF at the regulator is essential for USB signal-integrity compliance.
This page consolidates current distributor pricing, drop-in compatible alternatives in the same 64-pin TQFP footprint, and practical engineering notes not duplicated in the manufacturer's datasheet.
Drop-in alternatives for PIC32MX420F032HT-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 PIC32MX420F032HT-40V/PT (same form factor and footprint) — differing in Package, ADC, Core Architecture, Operating Temperature, DMA Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX420F032HT-40I/PT
✅ Drop-In✓ In Stock
$3.42 / Unit
View Datasheet →PIC32MX420F032H-40I/MR
✅ Drop-In✓ In Stock
$2.5 / Unit
View Datasheet →PIC32MX420F032HT-40I/MR
✅ Drop-In✓ In Stock
$5.74 / Unit
View Datasheet →PIC32MX420F032H-40I/
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →PIC32MX420F032HT-40V/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Core Frequency | 40 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| Data SRAM | 8 KB |
| Supply Voltage | 2.3 V to 3.6 V (typical 3.3 V) |
| Operating Temperature | -40 C to +105 C (V grade) |
| ADC | 10-bit, up to 1 Msps |
| USB | USB-OTG (full-speed, 12 Mbps) with on-chip transceiver |
| DMA Channels | 4 |
| Timers | 5 x 16-bit |
| UART | 2 |
| SPI | 2 |
| I2C | 2 |
| Package | 64-pin TQFP (10x10 mm), /PT suffix |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | MSL3 (per typical TQFP handling) |
PIC32MX420F032HT-40V/PT 64-pin tqfp (10x10 mm), /pt suffix Pin Configuration Guide
Pin configuration for PIC32MX420F032HT-40V/PT (64-pin tqfp (10x10 mm), /pt suffix 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 PIC32MX420F032HT-40V/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX420F032HT-40V/PT is suitable for 6 applications: USB HID/CDC Peripheral Devices, Industrial Sensor Hubs, Small Graphical User Interfaces (PMP), BLDC/PMSM Motor Control, Portable Test and Measurement, USB-OTG Host (Smart Hub).
USB HID/CDC Peripheral Devices
The PIC32MX420F032HT-40V/PT is ideal for USB HID and CDC peripherals because of its integrated full-speed USB-OTG transceiver and 32 KB Flash, which is enough room for Microchip's USB stack plus application logic. The 10-bit 1 Msps ADC handles analog sensors feeding USB reports at typical 1 kHz polling without saturating the MIPS32 M4K core at 40 MHz. The on-chip pull-up selection (via the USB module register) eliminates an external 1.5 kohm resistor in bus-powered designs, simplifying the BOM. Versus PIC24 alternatives, the 32-bit core delivers 2-3x the throughput for HID reports with bulk endpoint throughput, useful for keyboards/mice/CDC serial emulators that need deterministic latency.
Recommended
Industrial Sensor Hubs
The PIC32MX420F032HT-40V/PT's 16-channel 10-bit ADC, 4-channel DMA, and -40C to +105C extended temperature grade (V suffix) make it a strong fit for industrial sensor hubs that aggregate 4-8 analog inputs at 1 Msps and forward data over USB. The DMA controller offloads ADC sample transfer to memory, freeing the 40 MHz MIPS core for sensor fusion math; the part's 8 KB SRAM buffers DMA descriptors plus ADC ping-pong buffers. The 64-pin TQFP footprint offers sufficient I/O for digital sensor busses (SPI/I2C) and RS-485 UART bridges.
Recommended
Small Graphical User Interfaces (PMP)
The PIC32MX420F032HT-40V/PM parallel master port (PMP) can drive small graphical LCDs (up to QVGA) when paired with sufficient external memory, though the 8 KB SRAM and 32 KB Flash are tight for full QVGA framebuffers; engineers typically use external SRAM for buffering. The 40 MHz MIPS core can sustain bit-banged SPI/8080 transactions at 20+ MHz PMP clock, enabling responsive UI updates at 30+ Hz. The 64-pin TQFP footprint exposes enough I/O for PMP data, control, and resistive touch.
Recommended
BLDC/PMSM Motor Control
The PIC32MX420F032HT-40V/PM five 16-bit timers, 4-channel DMA, and -40C to +105C extended temperature grade support single-shunt and dual-shunt BLDC/PMSM motor control loops at switching frequencies up to 50 kHz. The 10-bit ADC paired with PWM with 10-bit resolution is acceptable for trapezoidal commutation; field-oriented control (FOC) implementations typically migrate to dsPIC33 parts. The 64-pin TQFP exposes enough I/O for three-phase gate driver enable signals, hall-sensor inputs, and over-current comparators.
Recommended
Portable Test and Measurement
The PIC32MX420F032HT-30V/PM USB-OTG enables battery-powered portable instruments to push 1 Msps ADC samples over USB to a host PC for analysis, while the 32-bit MIPS core handles digital signal conditioning. The 40 MHz speed grade is sufficient for FIR/IIR filtering at audio bandwidths; the 8 KB SRAM accommodates 256 32-bit filter taps plus ADC ping-pong buffers. The 64-pin TQFP package's exposed pad provides good thermal dissipation for full 1-slot ADC sampling at 1 Msps.
Recommended
USB-OTG Host (Smart Hub)
The PIC32MX420F032HT-40V/PM USB-OTG host mode allows it to enumerate USB peripherals (keyboards, mass storage, CDC modems) at full speed, making it a fit for embedded HMI kiosks that read barcodes or RFID readers. The 32 KB Flash accommodates a USB host stack plus HID/MSD class drivers, while 8 KB SRAM handles USB host descriptor buffers and a single-page FAT cache. The 64-pin TFP exposes USB host power-enable and overcurrent signals on dedicated pins, simplifying host port protection circuits.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX420F032HT-40V/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX420F032HT-40I/PT | PIC32MX420F032H-40I/MR | PIC32MX420F032HT-40I/MR | PIC32MX420F032H-40I/ |
|---|---|---|---|---|---|
| Brand | 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 |
| Core Architecture | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same |
| Core Frequency | 40 MHz | 40 MHz - same | 40 MHz - same | 40 MHz - same | 40 MHz - same |
| Program Flash | 32 KB | 32 KB - same | 32 KB - same | 32 KB - same | 32 KB - same |
| Data SRAM | 8 KB | 8 KB - same | 8 KB - same | 8 KB - same | 8 KB - same |
| USB-OTG | Yes (full-speed) | Yes (full-speed) - same | Yes (full-speed) - same | Yes (full-speed) - same | Yes (full-speed) - same |
| Operating Temperature | -40C to +105C (extended) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| ADC | 10-bit, 1 Msps | 10-bit, 1 Msps - same | 10-bit, 1 Msps - same | 10-bit, 1 Msps - same | 10-bit, 1 Msps - same |
Key Differentiators
- Extended temperature grade (-40C to +105C) for industrial applications (vs PIC32MX420F032HT-40I/PT)
- On-chip USB-OTG eliminates external PHY (vs PIC32MX230F064H (no USB))
- 32-bit MIPS32 M4K core with 1.56 DMIPS/MHz (vs PIC24FJ64GA004 (16-bit))
Design Notes
Decouple each VDD/VSS pair with a 100 nF ceramic placed within 3 mm of the pin, plus a bulk 4.7 uF tantalum or aluminum polymer near the 3.3V regulator output. The USB D+/D- trace impedance must be 45 ohms single-ended (90 ohms differential) per USB 2.0 specification; route D+/D- as a length-matched differential pair with no stubs. The AVDD pin (analog 3.3V) should be filtered with a ferrite bead and decoupled with 100 nF + 10 uF for ADC accuracy at 1 Msps.
Do not enable both the internal USB pull-up and an external 1.5 kohm pull-up on D+; this violates the USB electrical spec and can fail USB-IF compliance testing. The 'V' suffix (extended -40C to +105C) and 'I' suffix (industrial -40C to +85C) are not interchangeable in safety-critical applications; verify the temperature range matches the end-product spec. The 64-pin TQFP exposed pad must be soldered to the PCB ground plane for thermal dissipation and electrical performance; failing to solder the pad can cause junction temperature rise at full USB + ADC load.
Route the 40 MHz system clock trace with controlled impedance and keep it short (< 25 mm); use a ground reference plane on layer 2 directly under the clock trace. Place the 8 MHz primary oscillator crystal within 5 mm of OSC1/OSC2 pins with short, symmetric traces and a guard ground ring to reduce EMI. The ICSP programming pins (PGECx/PGEDx) should be brought out to a 0.1-inch header for production programming and debug access; do not place series resistors on these pins.
Compliance Information
RoHS and lead-free status confirmed per Microchip product family documentation. AEC-Q100 qualification is not claimed for the PIC32MX420 family; AEC-Q100 parts in this segment would be PIC32MX1xx/2xx automotive variants. Halogen-free status not explicitly stated in the verified data.
