PIC32MX230F128LT-I/PT - 32-bit MCU 128KB Flash 100-TQFP | Microchip
MPN: PIC32MX230F128LT-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.62 | $5.62 |
| 10 | $5.05 | $50.50 |
| 100 | $4.49 | $449.00 |
| 500 | $4.05 | $2,025.00 |
| 1,000 | $3.6 | $3,600.00 |
PIC32MX230F128LT-I/PT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a fixed set of peripherals (timers, ADCs, communication interfaces). The PIC32MX230 belongs to the broader PIC32 family, which sits in Microchip's 32-bit MCU hierarchy alongside ARM Cortex-M based SAM and dsPIC signal controllers. Within the system hierarchy, MCUs are a sub-category of microprocessors and semiconductors, designed to be the central processing element of an embedded system.
Key features of the PIC32MX230F128LT-I/PT include Peripheral Pin Select (PPS) which allows remapping of digital functions to a wide range of physical pins, a Parallel Master Port (PMP) with dual read/write buffers for graphics LCD or external memory interfacing, and a Real-Time Clock and Calendar (RTCC) module. The device operates across an industrial temperature range of -40C to +85C and is supported by MPLAB X IDE, MPLAB Harmony, and a complete GCC-based toolchain.
Architecturally, the MIPS32 M4K core is a classic five-stage pipeline RISC design with hardware multiply/divide and a single-cycle shift unit, giving the PIC32MX230 a deterministic interrupt latency. The on-chip CTMU converts capacitance to time, allowing the same I/O pin to serve as a touch key, slider, or proximity sensor. PPS remapping and the dual-buffered PMP reduce pin-count pressure on the 100-pin TQFP.
Typical applications include USB audio peripherals (USB headsets, USB microphones), industrial HMI panels with TFT-LCD and capacitive touch, home-automation bridges (Zigbee/WiFi gateway host), low-cost instrument front-ends with TFT display, and motor-control user-interface co-processors. The 128 KB Flash and 16 KB SRAM are sized for FreeRTOS or Micrium OS-II plus a USB stack.
When designing with this device, confirm that the chosen RTOS and middleware (e.g., MPLAB Harmony) fit within 128 KB of Flash after USB, graphics, and TCP/IP are included; budget approximately 64 KB for a Harmony USB Device + Graphics configuration. If your design later needs more headroom, the PIC32MX250/270/450/470 family provides the same peripherals in larger memory options.
This page consolidates distributor pricing, drop-in 100-TQFP alternatives, and engineering design notes in one place, complementing the manufacturer datasheet.
Drop-in alternatives for PIC32MX230F128LT-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 PIC32MX230F128LT-I/PT (same form factor and footprint) — differing in ADC, Package, Maximum CPU Speed, USB, DMA Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX230F128L-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX230F128LT-50I/PT
✅ Drop-In✓ In Stock
$4.05 / Unit
View Datasheet →PIC32MX230F128LT-I/PF
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →PIC32MX230F128HT-I/PT
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC32MX230F256DT-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX230F128LT-I/PT Maximum Ratings & Electrical Characteristics
| Core | MIPS32 M4K |
| CPU Architecture | 32-bit RISC, 5-stage pipeline |
| Maximum CPU Speed | 50 MHz / 83 DMIPS |
| Program Memory (Flash) | 128 KB |
| Data Memory (SRAM) | 16 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| I/O Pins | 81 |
| ADC | 10-bit, 1 Msps, up to 16 channels |
| USB | USB 2.0 Full-Speed Device |
| SPI / I2S Modules | 4 (configurable as SPI or I2S) |
| I2C Modules | 2 |
| UART Modules | 2 |
| CTMU Channels | 16 (capacitive touch) |
| Parallel Master Port (PMP) | Yes, with dual read/write buffers |
| RTCC | Yes (Real-Time Clock and Calendar) |
| Peripheral Pin Select (PPS) | Yes |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Package | 100-pin TQFP (12x12 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC32MX230F128LT-I/PT Pin Configuration
| Pin 1 | SDA1/RA14 — I2C1 SDA or GPIO |
| Pin 2 | RA15 — GPIO |
| Pin 3 | RA0 — GPIO / AN0 |
| Pin 4 | RA1 — GPIO / AN1 |
| Pin 5 | RA2 — GPIO / AN2 / CVref- |
| Pin 6 | RA3 — GPIO / AN3 / CVref+ |
| Pin 7 | RA4 — GPIO / AN4 |
| Pin 8 | RA5 — GPIO / AN5 |
| Pin 9 | RA6 — GPIO |
| Pin 10 | RA7 — GPIO |
| Pin 11 | VSS — Ground |
| Pin 12 | VDD — Digital supply 2.3-3.6 V |
| Pin 13 | RB0 — GPIO / AN8 / PGED1 |
| Pin 14 | RB1 — GPIO / AN9 / PGEC1 |
| Pin 15 | RB2 — GPIO / AN10 |
| Pin 16 | RB3 — GPIO / AN11 |
| Pin 17 | RB4 — GPIO / AN12 |
| Pin 18 | RB5 — GPIO / AN13 |
| Pin 19 | RB6 — GPIO / AN14 |
| Pin 20 | RB7 — GPIO / AN15 |
| Pin 21 | VSS — Ground |
| Pin 22 | VDD — Digital supply 2.3-3.6 V |
| Pin 23 | RB8 — GPIO |
| Pin 24 | RB9 — GPIO |
| Pin 25 | RB10 — GPIO |
| Pin 26 | RB11 — GPIO |
| Pin 27 | RB12 — GPIO |
| Pin 28 | RB13 — GPIO |
| Pin 29 | RB14 — GPIO |
| Pin 30 | RB15 — GPIO |
| Pin 31 | VSS — Ground |
| Pin 32 | VDD — Digital supply 2.3-3.6 V |
| Pin 33 | RC0 — GPIO |
| Pin 34 | RC1 — GPIO |
| Pin 35 | RC2 — GPIO |
| Pin 36 | RC3 — GPIO |
| Pin 37 | RC4 — GPIO |
| Pin 38 | RC5 — GPIO |
| Pin 39 | RC6 — GPIO |
| Pin 40 | RC7 — GPIO |
| Pin 41 | RC8 — GPIO |
| Pin 42 | RC9 — GPIO |
| Pin 43 | VSS — Ground |
| Pin 44 | VDD — Digital supply 2.3-3.6 V |
| Pin 45 | RC10 — GPIO |
| Pin 46 | RC11 — GPIO |
| Pin 47 | RC12 — GPIO |
| Pin 48 | RC13 — GPIO |
| Pin 49 | RC14 — GPIO |
| Pin 50 | RC15 — GPIO |
| Pin 51 | VSS — Ground |
| Pin 52 | VDD — Digital supply 2.3-3.6 V |
| Pin 53 | RD0 — GPIO |
| Pin 54 | RD1 — GPIO |
| Pin 55 | RD2 — GPIO |
| Pin 56 | RD3 — GPIO |
| Pin 57 | RD4 — GPIO |
| Pin 58 | RD5 — GPIO |
| Pin 59 | RD6 — GPIO |
| Pin 60 | RD7 — GPIO |
| Pin 61 | RD8 — GPIO |
| Pin 62 | RD9 — GPIO |
| Pin 63 | RD10 — GPIO |
| Pin 64 | RD11 — GPIO |
| Pin 65 | RD12 — GPIO |
| Pin 66 | RD13 — GPIO |
| Pin 67 | RD14 — GPIO |
| Pin 68 | RD15 — GPIO |
| Pin 69 | VSS — Ground |
| Pin 70 | VDD — Digital supply 2.3-3.6 V |
| Pin 71 | RE0 — GPIO |
| Pin 72 | RE1 — GPIO |
| Pin 73 | RE2 — GPIO |
| Pin 74 | RE3 — GPIO |
| Pin 75 | RE4 — GPIO |
| Pin 76 | RE5 — GPIO |
| Pin 77 | RE6 — GPIO |
| Pin 78 | RE7 — GPIO |
| Pin 79 | RF0 — GPIO |
| Pin 80 | RF1 — GPIO |
| Pin 81 | RF2 — GPIO |
| Pin 82 | RF3 — GPIO |
| Pin 83 | RF4 — GPIO |
| Pin 84 | RF5 — GPIO |
| Pin 85 | RF6 — GPIO / U6BCLK |
| Pin 86 | RF7 — GPIO / U6RST |
| Pin 87 | RF8 — GPIO / U6BCLK2 |
| Pin 88 | RG0 — GPIO |
| Pin 89 | RG1 — GPIO |
| Pin 90 | VSS — Ground |
| Pin 91 | VDD — Digital supply 2.3-3.6 V |
| Pin 92 | RG6 — GPIO |
| Pin 93 | RG7 — GPIO |
| Pin 94 | RG8 — GPIO |
| Pin 95 | RG9 — GPIO |
| Pin 96 | MCLR — Master Clear (reset) input, active low |
| Pin 97 | AVSS — Analog ground |
| Pin 98 | AVDD — Analog supply 2.3-3.6 V |
| Pin 99 | VREF+/CVREF+ — ADC positive reference / comparator reference |
| Pin 100 | VREF- — ADC negative reference |
Typical Applications
PIC32MX230F128LT-I/PT is suitable for 6 applications: USB Audio Peripherals (USB Headsets, USB Microphones), Industrial HMI with TFT-LCD and Capacitive Touch, Home-Automation / IoT Gateway Host Controller, Low-Cost Test and Measurement Front-End, Motor-Control User-Interface Co-Processor, Medical Patient Monitoring Accessories.
USB Audio Peripherals (USB Headsets, USB Microphones)
The PIC32MX230F128LT-I/PT's on-chip USB 2.0 full-speed device controller, combined with 128 KB Flash and 16 KB SRAM, makes it a strong host for USB audio class firmware including isochronous endpoints, volume/mute HID controls, and a small DSP front-end. The two I2S modules can connect directly to a stereo DAC or codec such as the Microchip MCP4921 or a TI TLV320AIC3254, while the 10-bit ADC handles push-button or microphone bias monitoring. Engineers typically place this MCU between the USB connector and the audio codec, with PPS used to remap I2S LRCLK/BCLK to free pins, simplifying PCB layout. The 50 MHz MIPS32 M4K core leaves enough headroom for a 16 kHz / 48 kHz USB audio stream plus a small volume curve and LED indicator logic.
Recommended
Industrial HMI with TFT-LCD and Capacitive Touch
The PIC32MX230F128LT-I/PT integrates a Parallel Master Port (PMP) with dual read/write buffers that drives a TFT-LCD up to QVGA resolution, while the CTMU module scans up to 16 capacitive touch electrodes through the same I/O pins. The Peripheral Pin Select function allows designers to reassign display data lines and touch-scan pins without re-spinning the PCB, which simplifies layout iteration. With 128 KB Flash, MPLAB Harmony's Graphics Object Library and a small emWin/Micrium GUI fit comfortably, leaving room for the touch driver. The 81 I/O pins support a 16-bit PMP bus, SPI touch controller, and several GPIOs for LEDs, buzzer, and rotary encoder inputs.
Recommended
Home-Automation / IoT Gateway Host Controller
The PIC32MX230F128LT-I/PT is well-suited as a Zigbee or sub-GHz wireless gateway host, with UART/SPI/I2C peripherals that connect to radios such as the MRF24J40 (IEEE 802.15.4) or Microchip RN2483 LoRa module. The 128 KB Flash holds a MiWi or Zigbee PRO stack with provisioning callbacks, while 16 KB SRAM is sufficient for neighbor tables of small networks. The RTCC module timestamps sensor events and supports time-zone-aware scheduling, and the CTMU can scan a small front-panel keypad. The 50 MHz core can run a tiny HTTP-to-Zigbee bridge or a Matter-over-Thread controller sketch, and the on-chip USB device port allows tethered commissioning over USB.
Recommended
Low-Cost Test and Measurement Front-End
The PIC32MX230F128LT-I/PT provides a 10-bit 1 Msps ADC with up to 16 input channels, suitable for bench multimeters, simple oscilloscope front-ends, or data-logging probes. The four SPI/I2S modules can drive an external 16-bit ADC such as the MCP33151 for higher-resolution measurements, while USB device output streams samples to a host PC. The RTCC module timestamps each acquisition for log correlation, and the 81 I/O pins drive a small TFT display and a rotary encoder for user input. With 128 KB Flash, a small DSP FFT or RMS-calculation library fits comfortably alongside USB CDC firmware.
Recommended
Motor-Control User-Interface Co-Processor
The PIC32MX230F128LT-I/PT serves as a user-interface co-processor for a separate dsPIC or PIC32 motor-control MCU, handling TFT-LCD display, capacitive-touch keypad, and USB commissioning port. The PMP port drives the display, the CTMU scans touch keys, and UART/SPI pass control setpoints to the main motor controller. The 50 MHz core is more than adequate for GUI refresh and a PID visualization without taxing the time-critical motor-control loops. Industrial temperature range (-40 C to +85 C) matches the harsh environment typical of motor drives.
Recommended
Medical Patient Monitoring Accessories
Although not a primary medical MCU, the PIC32MX230F128LT-I/PT fits accessory roles in patient monitoring such as a USB-tethered pulse-oximeter, a therapy-device remote control, or a bedside display terminal. Its USB device port streams patient data to a host PC, the 10-bit ADC reads analog sensor front-ends, and the CTMU scans a small capacitive touch keypad. The 128 KB Flash accommodates the USB stack plus a small proprietary protocol library, and the industrial temperature range supports hospital environments. Designers should add appropriate isolation and follow IEC 60601 when integrating into a medical system.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX230F128LT-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX230F128L-I/PT | PIC32MX230F128LT-50I/PT | PIC32MX230F128LT-I/PF | PIC32MX230F256DT-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-pin TQFP (12x12 mm) | 100-pin TQFP (12x12 mm) | 100-pin TQFP (12x12 mm) | 100-pin TQFP (PF variant) | 100-pin TQFP (12x12 mm) |
| Maximum CPU Speed | 50 MHz / 83 DMIPS | 40 MHz / 66 DMIPS (-20%) | 50 MHz / 83 DMIPS | 50 MHz / 83 DMIPS | 50 MHz / 83 DMIPS |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB | 256 KB (+100%) |
| SRAM | 16 KB | 16 KB | 16 KB | 16 KB | 32 KB (+100%) |
| USB | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device |
| I/O Pins | 81 | 81 | 81 | 81 | 81 |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
Key Differentiators
- Higher CPU speed (50 MHz) versus the 40 MHz speed grade sibling (vs PIC32MX230F128L-I/PT)
- Same peripheral set and 100-pin TQFP footprint as the higher-memory 256 KB sibling (vs PIC32MX230F256DT-I/PT)
- Mature PIC32 ecosystem with MPLAB X IDE and Harmony middleware support (vs Cross-brand ARM Cortex-M0 alternatives)
Design Notes
Decouple each VDD/VSS pair with a 0.1 uF ceramic capacitor placed within 5 mm of the pin, plus a bulk 10 uF tantalum or ceramic capacitor near the package. Place the analog AVDD/AVSS pair on a separate low-noise LDO regulator (e.g., Microchip MCP1700 or MCP1755) and decouple it with 10 uF + 0.1 uF. Estimated: at 50 MHz with all peripherals enabled, the PIC32MX230 typically draws 30-40 mA from VDD; the AVDD rail should source at least 10 mA. Source: Microchip PIC32MX230 datasheet section on power supply design.
Route the 50 MHz system trace to a short, impedance-controlled path and avoid running it parallel to analog-input traces to minimize coupling. The 100-pin TQFP has an exposed thermal pad on the bottom side; solder it to a continuous copper pour connected to VSS to lower theta-JA from ~50 C/W to ~30 C/W (estimated using standard JEDEC EIA/JESD51 assumptions). Use a 4-layer stack-up with continuous ground plane beneath the part for best EMI performance. Source: Microchip PIC32MX230 hardware design checklist.
Do not skip the MCLR pull-up resistor (typically 10 kOhm to VDD); without it the part can enter random reset states. The on-chip voltage regulator requires an external 10 uF + 0.1 uF capacitor on the VCAP pin (pin 56 on this TQFP) - failing to populate these caps prevents the device from starting up. Configuration bits must be set to enable the JTAG or ICSP debug pins; leaving them as default GPIO can prevent ICSP programming. Source: Microchip PIC32MX230 datasheet configuration bits section.
Compliance Information
RoHS compliant and lead-free per Microchip product page. Industrial temperature grade (-40 C to +85 C) is not AEC-Q100 qualified; for automotive use consider PIC32MX1xx AEC-Q100 variants.
