PIC32MX230F128HT-I/PT - 32-bit 50MHz 128KB Flash MCU | Microchip
MPN: PIC32MX230F128HT-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.18 | $41.80 |
| 100 | $3.71 | $371.00 |
| 500 | $3.29 | $1,645.00 |
| 1,000 | $2.92 | $2,920.00 |
| 3,000 | $2.55 | $7,650.00 |
PIC32MX230F128HT-I/PT Overview
A 32-bit microcontroller is an integrated circuit combining a 32-bit CPU core, program memory (Flash), data memory (SRAM), and configurable peripherals on a single silicon die. Within the broader taxonomy, this places the part as a microcontroller -> embedded processor -> system-on-chip (SoC) -> semiconductor IC. The PIC32MX family specifically targets cost-sensitive embedded applications that require USB connectivity, digital audio, and human-machine interface (HMI) features without the overhead of higher-end Cortex-M parts.
Key features include a 1.25 DMIPS/MHz MIPS32 M4K core, single-cycle multiplication and division, a 5-stage pipeline, and up to 51 GPIO pins. The device also includes three SPI/I2S modules, two UART modules, two I2C modules, five 16-bit timers/counters, and a 16-channel DMA controller. An 8-bit Parallel Master Port (PMP) supports external memory or graphics displays. The internal 8 MHz Fast RC oscillator with PLL provides flexible clocking, and an on-chip LDO regulator simplifies single-rail 2.5 V/3.3 V designs.
The architecture uses a Harvard-style bus with separate Flash and SRAM buses, enabling simultaneous instruction fetch and data access for predictable interrupt latency. The USB 2.0 full-speed PHY is integrated on-chip, eliminating external transceiver components. The CTMU peripheral enables capacitive touch sensing for buttons, sliders, and proximity detection, while the RTCC maintains accurate timekeeping with backup battery domain. The 10-bit ADC with DMA support enables high-throughput sensor sampling at up to 1 Msps.
Typical applications include USB peripherals (HID, CDC, mass storage), consumer audio products (MP3 players, headphones, soundbars), home appliances with capacitive touch user interfaces, industrial control panels, medical monitoring devices, and low-cost HMI designs with graphics LCD support. The combination of USB, CTMU, and I2S makes it particularly suited for connected audio appliances and USB-charging smart-home hubs.
When designing with this part, allocate PCB footprint for the 10x10 mm TQFP body with 0.5 mm pitch and ensure the USB D+/D- traces are routed as a 90 ohm differential pair. Decouple VDD with 100 nF and 4.7 uF capacitors placed within 3 mm of each supply pin, and provide a 4.7 kohm pull-up on D+ for full-speed USB enumeration.
This page synthesizes distributor pricing, verified drop-in alternatives from the same PIC32MX family, and practical PCB design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC32MX230F128HT-I/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 PIC32MX230F128HT-I/PT (same form factor and footprint) — differing in ADC, Package, Parallel Master Port (PMP), USB, Maximum CPU Speed.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX230F128H-I/PT
✅ Drop-In✓ In Stock
$2.78 / Unit
View Datasheet →PIC32MX230F128HT-50I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX130F128HT-I/PT
✅ Drop-In✓ In Stock
$2.35 / Unit
View Datasheet →PIC32MX150F128HT-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX170F256H-V/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX230F128HT-V/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX230F128HT-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Speed | 50 MHz |
| Flash Program Memory | 128 KB |
| SRAM Data Memory | 16 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Package | 64-pin TQFP (PT) 10x10 mm |
| Mounting Type | Surface Mount |
| USB Interface | USB 2.0 Full-Speed Device/Host/OTG |
| ADC | 10-bit, up to 28 channels, 1 Msps |
| GPIO Count | 51 (multiplexed) |
| UART | 2 modules |
| SPI / I2S | 3 modules (SPI or I2S configurable) |
| I2C | 2 modules |
| Timers | 5 x 16-bit |
| DMA Channels | 16 |
| CTMU (Capacitive Touch) | Yes, on-chip |
| RTCC (Real-Time Clock) | Yes, with backup battery domain |
| Parallel Master Port (PMP) | 8-bit, for external memory/graphics |
| Operating Temperature | -40 C to +85 C (Industrial) |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
PIC32MX230F128HT-I/PT Pin Configuration
| Pin 1 | SDA2/RA0 — I2C2 data / GPIO RA0 |
| Pin 2 | SCL2/RA1 — I2C2 clock / GPIO RA1 |
| Pin 3 | RA2 — GPIO RA2 |
| Pin 4 | RA3 — GPIO RA3 |
| Pin 5 | RA4 — GPIO RA4 |
| Pin 6 | RA5 — GPIO RA5 |
| Pin 7 | RA6 — GPIO RA6 |
| Pin 8 | RA7 — GPIO RA7 |
| Pin 9 | RB0 — GPIO RB0 / PGED1 |
| Pin 10 | RB1 — GPIO RB1 / PGEC1 |
| Pin 11 | RB2 — GPIO RB2 |
| Pin 12 | RB3 — GPIO RB3 |
| Pin 13 | RB4 — GPIO RB4 |
| Pin 14 | RB5 — GPIO RB5 |
| Pin 15 | RB6 — GPIO RB6 |
| Pin 16 | RB7 — GPIO RB7 |
| Pin 17 | RB8 — GPIO RB8 |
| Pin 18 | RB9 — GPIO RB9 |
| Pin 19 | RB10 — GPIO RB10 |
| Pin 20 | RB11 — GPIO RB11 |
| Pin 21 | RB12 — GPIO RB12 |
| Pin 22 | RB13 — GPIO RB13 |
| Pin 23 | RB14 — GPIO RB14 |
| Pin 24 | RB15 — GPIO RB15 |
| Pin 25 | RC0 — GPIO RC0 |
| Pin 26 | RC1 — GPIO RC1 |
| Pin 27 | RC2 — GPIO RC2 |
| Pin 28 | RC3 — GPIO RC3 |
| Pin 29 | RC4 — GPIO RC4 |
| Pin 30 | RC5 — GPIO RC5 |
| Pin 31 | RC6 — GPIO RC6 |
| Pin 32 | RC7 — GPIO RC7 |
| Pin 33 | RC8 — GPIO RC8 |
| Pin 34 | RC9 — GPIO RC9 |
| Pin 35 | VDD — Positive supply voltage (2.3-3.6 V) |
| Pin 36 | VSS — Ground reference |
| Pin 37 | RD0 — GPIO RD0 |
| Pin 38 | RD1 — GPIO RD1 |
| Pin 39 | RD2 — GPIO RD2 |
| Pin 40 | RD3 — GPIO RD3 |
| Pin 41 | RD4 — GPIO RD4 |
| Pin 42 | RD5 — GPIO RD5 |
| Pin 43 | RD6 — GPIO RD6 |
| Pin 44 | RD7 — GPIO RD7 |
| Pin 45 | VDD — Positive supply voltage |
| Pin 46 | VSS — Ground reference |
| Pin 47 | RD8 — GPIO RD8 |
| Pin 48 | RD9 — GPIO RD9 |
| Pin 49 | RD10 — GPIO RD10 |
| Pin 50 | RD11 — GPIO RD11 |
| Pin 51 | RD12 — GPIO RD12 |
| Pin 52 | RD13 — GPIO RD13 |
| Pin 53 | RD14 — GPIO RD14 |
| Pin 54 | RD15 — GPIO RD15 |
| Pin 55 | RF0 — GPIO RF0 |
| Pin 56 | RF1 — GPIO RF1 |
| Pin 57 | RF2 — GPIO RF2 / USB D- |
| Pin 58 | RF3 — GPIO RF3 / USB D+ |
| Pin 59 | RF4 — GPIO RF4 |
| Pin 60 | RF5 — GPIO RF5 |
| Pin 61 | RF6 — GPIO RF6 |
| Pin 62 | RF7 — GPIO RF7 |
| Pin 63 | RF8 — GPIO RF8 |
| Pin 64 | VSS — Ground reference |
Typical Applications
PIC32MX230F128HT-I/PT is suitable for 6 applications: USB HID / CDC Peripheral Devices, Consumer Audio Products (Soundbars / Headphones / MP3), Home Appliance Control Panels with Capacitive Touch, Industrial Sensor Hubs and Data Loggers, Medical Monitoring Devices (Non-Critical), USB Smart Home Hubs and Chargers.
USB HID / CDC Peripheral Devices
The PIC32MX230F128HT-I/PT is well suited to USB Human Interface Devices (HID) and Communication Device Class (CDC) peripherals thanks to its integrated USB 2.0 Full-Speed controller with on-chip PHY, which eliminates external transceiver components. The 128 KB Flash accommodates the Microchip MLA USB stack plus HID/CDC class drivers, while the 16 KB SRAM supports HID report buffers and CDC line-coding state. At 40 MHz the M4K core delivers 50 DMIPS, sufficient for parsing USB descriptors and servicing HID reports at 1000 Hz polling rates. The 51 GPIO enables direct connection to key matrices, encoders, LEDs, and feature switches. Industrial temperature grade permits deployment in office and light-industrial peripherals. Layout guidance: route D+/D- as a 90 ohm differential pair on the top layer with continuous reference ground, place the 4.7 kohm pull-up on D+ within 5 mm of the pin, and add 15 pF ESD diodes to USB connector shield.
Recommended
Consumer Audio Products (Soundbars / Headphones / MP3)
The PIC32MX230F128HT-I/PT targets cost-sensitive audio appliances through its three SPI/I2S modules that interface directly to DACs, ADCs, and digital audio amplifiers without glue logic. The CTMU peripheral enables capacitive-touch volume sliders and play/pause controls on speaker enclosures, while the 10-bit 1 Msps ADC handles battery monitoring and audio level detection. The 16 KB SRAM supports 8 kHz/16 kHz audio sample buffering for playback effects, and the 128 KB Flash holds audio decoders such as MP3 or SBC. The 64-pin TQFP package fits inside compact headphone and soundbar enclosures. At 3.3 V operation the part is directly compatible with portable Li-ion battery rails. Design note: place the I2S MCLK within the same clock domain as the DAC to avoid jitter-induced audio artifacts, and use the DMA controller to move audio samples between I2S and SRAM without CPU intervention.
Recommended
Home Appliance Control Panels with Capacitive Touch
Capacitive touch user interfaces on washing machines, induction cooktops, ovens, and dishwashers are a primary application for the PIC32MX230F128HT-I/PT because of its integrated CTMU peripheral, which measures sub-picofarad capacitance changes for reliable button and slider detection through 5 mm glass. The RTCC maintains time-of-day and schedule data with backup battery domain, while the 10-bit ADC reads NTC thermistors for temperature control feedback. The 51 GPIO drives seven-segment displays, LED indicators, and triac control signals, and the 128 KB Flash supports IEC 60730 Class B safety library for white goods certification. The industrial -40C to +85C temperature range covers all kitchen and laundry environments. PCB guideline: route touch electrodes as guarded traces with the CTMU, place a ground ring around each button electrode, and use the on-chip RTCC with a 32.768 kHz crystal for accurate scheduling.
Recommended
Industrial Sensor Hubs and Data Loggers
Industrial sensor hubs and data loggers benefit from the PIC32MX230F128HT-I/PT's combination of 28-channel 10-bit ADC, 16 DMA channels, and USB connectivity for high-throughput multi-sensor acquisition. The 128 KB Flash supports Modbus RTU, CAN, and proprietary protocols, while the 16 KB SRAM buffers sensor samples before USB upload or local storage. The 5 x 16-bit timers generate precise PWM outputs for valve/actuator control, and the parallel master port (PMP) interfaces to external SRAM for extended logging buffer. The 64-pin TQFP and industrial temperature rating fit inside IP65 enclosures. Typical implementations log 4-8 sensor channels at 1 kHz sampling rate and stream results over USB CDC virtual COM port. Design tip: use the DMA to move ADC conversion results directly to SRAM, freeing the CPU to manage USB frame timing and protocol parsing.
Recommended
Medical Monitoring Devices (Non-Critical)
Non-critical medical monitoring devices such as pulse oximeters, blood pressure cuffs, and digital thermometers use the PIC32MX230F128HT-I/PT for its USB battery-charging-friendly 3.3 V operation, RTCC for time-stamped measurements, and ADC for analog sensor signal conditioning. The CTMU provides button and slider inputs on plastic enclosures, while the LCD parallel master port (PMP) drives alphanumeric segment displays. The 128 KB Flash accommodates reference design firmware with calibration routines, and the 16 KB SRAM stores measurement history. Note: this part is not FDA-approved for life-support or diagnostic applications; use only in fitness and wellness devices. For IEC 60601-1 compliance, add medical-grade isolation and redundant watchdog timers. PCB note: isolate analog AGND and digital DGND at a single point near the MCU, and add ferrite beads on analog supply lines.
Recommended
USB Smart Home Hubs and Chargers
USB-charging smart-home hubs, smart power strips, and USB-controlled LED lighting controllers leverage the PIC32MX230F128HT-I/PT's USB device and OTG capability to receive commands from a host phone or hub, then drive relays, MOSFETs, and PWM LED outputs through the 51 GPIO. The I2C peripherals read temperature, current, and ambient-light sensors, while the RTCC schedules on/off events. The 128 KB Flash holds firmware for popular voice assistant integrations, and the industrial temperature range covers garage and outdoor cabinets with appropriate enclosure. Typical designs consume under 50 mA active at 40 MHz, making USB bus-powered operation practical. Design tip: use the USB VBUS sense pin to detect host connection and wake the MCU from sleep, then drive GPIO relay outputs only after USB enumeration confirms valid host.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX230F128HT-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX230F128H-I/PT | PIC32MX230F128HT-50I/PT | PIC32MX130F128HT-I/PT | PIC32MX150F128HT-I/PT | PIC32MX170F256H-V/PT |
|---|---|---|---|---|---|---|
| Package | 64-TQFP (10x10) | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit |
| Max CPU Speed | 40 MHz | 40 MHz | 50 MHz | 40 MHz | 50 MHz | 50 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 256 KB |
| SRAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 64 KB |
| USB | Yes (FS Device/Host/OTG) | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +105 C |
Key Differentiators
- Integrated USB 2.0 Full-Speed PHY with on-chip transceiver (vs PIC32MX170F256H-V/PT)
- Capacitive touch (CTMU) peripheral on-chip (vs PIC32MX130F128HT-I/PT)
- Industrial temperature grade with USB and RTCC combination (vs PIC32MX230F128H-I/PT)
Design Notes
Route the USB D+ (RF3) and D- (RF2) signals as a 90 ohm differential pair on the top layer with continuous ground reference plane beneath. Place the 4.7 kohm pull-up resistor on D+ within 5 mm of the RF3 pin, and add 15 pF ESD protection diodes (such as USBLC6-2SC6) within 3 mm of the USB connector. Keep the differential pair matched within 0.5 mm length and maintain 3x dielectric spacing to other signals to meet USB 2.0 Full-Speed signal integrity requirements.
Decouple each VDD pin (35 and 45) with a 100 nF X7R ceramic capacitor placed within 3 mm of the pin, plus a bulk 4.7 uF X5R capacitor on each VDD rail. Connect AGND (pin 36) and DGND (pin 46) at a single point near the MCU. Use a ferrite bead on the analog AVDD supply if driving the ADC, and keep the 3.3 V supply ripple below 50 mVpp to avoid ADC noise coupling. For USB bus-powered designs, add a 10 uF bulk capacitor on VBUS to handle inrush current.
Do not skip the 32.768 kHz crystal on SOSCO/SOSCI pins if RTCC functionality is required - the internal RC oscillator is not accurate enough for timekeeping. The PGED1/PGEC1 pins (RB0/RB1) are required for ICSP programming and debugging; do not repurpose them as outputs without considering the programming interface. Configure unused GPIO as digital inputs with internal pull-ups to minimize power consumption and avoid floating-pin oscillations. The CTMU peripheral requires calibration of the internal current source before touch measurements; refer to Microchip AN1250 for calibration procedures.
Place the 8 MHz primary crystal (POSC) within 5 mm of the OSC1/OSC2 pins with a ground guard ring around both crystal traces. For designs using USB, enable the Primary Oscillator with USB PLL mode (48 MHz required for USB clock). Route the JTAG signals TMS/TCK/TDO/TDI (shared with GPIO) with 50 ohm traces and avoid parallel routing near switching signals. The TQFP exposed thermal pad is not present on the 64-pin TQFP package - no thermal pad connection required, simplifying layout vs QFN variants.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - the -V/PT variant may be required for automotive-grade applications. Lead-free and halogen-free per Microchip environmental certification.
