PIC32MX150F128B-50I/ML - 50MHz 32-bit MCU 128KB Flash | Microchip
MPN: PIC32MX150F128B-50I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.15 | $315.00 |
| 500 | $2.65 | $1,325.00 |
| 1,000 | $2.2 | $2,200.00 |
PIC32MX150F128B-50I/ML Overview
A 32-bit microcontroller (MCU) is a programmable system-on-chip that integrates a CPU core, volatile and non-volatile memory, peripherals, and I/O into a single semiconductor device. The PIC32MX family belongs to the broader PIC32 MIPS-based hierarchy, sitting between 8/16-bit PIC microcontrollers and the higher-performance PIC32MZ Cortex-class parts. By combining a 32-bit data path with deterministic interrupt latency and rich peripherals, 32-bit MCUs target embedded systems that require more compute than 8-bit parts but lower cost and power than application processors.
Key features of the PIC32MX150F128B include 16-channel 10-bit ADC, two comparators, four general-purpose 16-bit timers, five I2C ports, two UART modules, and two SPI/I2S ports. The device integrates mTouch capacitive touch hardware, an on-chip temperature sensor, and JTAG/ICSP debug interfaces. PPS allows most digital I/O functions to be remapped to alternate pins, simplifying PCB routing and enabling field upgrades without board changes.
Architecturally, the part uses a 5-stage MIPS32 M4K pipeline with hardware multiply/divide, prefetch cache, and tightly coupled RAM for deterministic execution. PMP provides an 8/16-bit parallel interface for graphics or external memory, while the 1 ns resolution timer is built from Input Capture hardware enabling precision measurement for motor control, lighting, and instrumentation.
Typical applications include industrial control panels, USB audio interfaces, capacitive touch key/slider front panels, low-power IoT sensor nodes, and consumer peripherals requiring graphical LCD or LED matrix displays. The compact 28-QFN footprint suits space-constrained designs such as wearables and embedded modules.
When designing with this part, ensure the exposed pad (EP) is soldered to a sufficient ground plane for thermal dissipation; failure to do so may force the device into thermal shutdown at high CPU loads. Also note that PPS remapping must be configured at startup before peripherals are used.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet.
Drop-in alternatives for PIC32MX150F128B-50I/ML — 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 PIC32MX150F128B-50I/ML (same form factor and footprint) — differing in Package, ADC, Maximum CPU Speed, Operating Voltage, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX150F128B-I/ML
✅ Drop-In✓ In Stock
$3.3 / Unit
View Datasheet →PIC32MX150F128B-50I/SO
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →PIC32MX150F128B-50I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX150F128BT-50I/ML
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC32MX150F128BT-V/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX250F128B-50I/ML
✅ Drop-In✓ In Stock
$3.16 / Unit
View Datasheet →PIC32MX150F128B-50I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Speed | 50 MHz |
| Program Flash Memory | 128 KB (128K x 8) |
| SRAM | 32 KB |
| Operating Voltage | 2.5V / 3.3V |
| Package | 28-pin QFN (6x6 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40C to +85C (Industrial, I grade) |
| ADC | 10-bit, up to 16 channels (per family datasheet) |
| Comparators | 2 |
| SPI/I2S Modules | 2 |
| Timers | Five 16-bit timers (per family datasheet) |
| Parallel Master Port (PMP) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| mTouch Capacitive Touch | Supported |
| On-chip Temperature Sensor | Yes |
| High-Resolution Timer | 1 ns resolution |
| Core Current Consumption | < 0.5 mA/MHz |
| RoHS Status | Compliant |
| Tube Packaging | Yes (per part designation /ML) |
| Lead-Free | Yes |
PIC32MX150F128B-50I/ML Pin Configuration
| Pin 1 | RB0 — Port B I/O / Programming clock (PGC) |
| Pin 2 | RB1 — Port B I/O / Programming data (PGD) |
| Pin 3 | RB2 — Port B I/O |
| Pin 4 | RB3 — Port B I/O |
| Pin 5 | RA0 — Port A I/O / analog input |
| Pin 6 | RA1 — Port A I/O / analog input |
| Pin 7 | RB4 — Port B I/O / SDA |
| Pin 8 | RB5 — Port B I/O / SCL |
| Pin 9 | VSS — Ground reference |
| Pin 10 | RA2 — Port A I/O / analog input |
| Pin 11 | RA3 — Port A I/O / analog input |
| Pin 12 | RB6 — Port B I/O / ICSPCLK |
| Pin 13 | RB7 — Port B I/O / ICSPDAT |
| Pin 14 | VDD — Positive supply for I/O and core |
| Pin 15 | RA4 — Port A I/O / analog input |
| Pin 16 | OSC1 — Oscillator crystal input / external clock |
| Pin 17 | OSC2 — Oscillator crystal output |
| Pin 18 | RC0 — Port C I/O |
| Pin 19 | RC1 — Port C I/O |
| Pin 20 | RC2 — Port C I/O |
| Pin 21 | RC3 — Port C I/O |
| Pin 22 | RC4 — Port C I/O |
| Pin 23 | RC5 — Port C I/O |
| Pin 24 | RC6 — Port C I/O |
| Pin 25 | RC7 — Port C I/O |
| Pin 26 | RB8 — Port B I/O |
| Pin 27 | RB9 — Port B I/O |
| Pin 28 | VSS — Ground reference |
| Pin EP | EP — Exposed thermal pad - solder to PCB ground |
Typical Applications
PIC32MX150F128B-50I/ML is suitable for 6 applications: Industrial HMI and Touch Panels, USB Audio / I2S Codec Interfaces, Capacitive Touch Keyboards / Sliders, Low-Power IoT Sensor Nodes, Motor Control and PWM Drivers, Consumer Peripherals and Wearables.
Industrial HMI and Touch Panels
The PIC32MX150F128B-50I/ML is well-suited to industrial human-machine interface (HMI) and capacitive touch panels. Its 50 MHz MIPS32 M4K core delivers up to 50 MIPS, enough to drive a small TFT via the integrated Parallel Master Port (PMP), debounce capacitive touch sensing via the mTouch peripheral, and run a lightweight graphics library. The 32 KB SRAM buffers partial frame updates to avoid tearing, while 128 KB Flash stores fonts and UI assets. PPS remaps peripherals across spare pins so the same firmware supports more elaborate control and signal-conditioning circuits; the Industrial -40C to +85C grade ensures reliable operation in factory-floor enclosures.
Recommended
USB Audio / I2S Codec Interfaces
With two USB 2.0 full-speed ports and dual I2S interfaces, the PIC32MX150F128B-50I/ML is a strong fit for USB audio peripherals, headphone DACs, and microphone arrays. The MIPS32 M4K core handles USB isochronous streaming at full 12 Mbps, while the I2S module streams 24-bit / 96 kHz audio to external DACs without CPU intervention via DMA. PPS remapping frees the I2S data and word-clock pins to multiple port pins, simplifying mixed-signal PCB layout. For voice-over-USB headsets, the 50 MHz headroom covers run-time sample-rate conversion and basic AEC filtering; on-chip comparators can be repurposed for analog microphone bias monitoring.
Recommended
Capacitive Touch Keyboards / Sliders
The PIC32MX150F128B-50I/ML integrates Microchip's mTouch capacitive touch hardware, enabling up to 16-channel capacitive buttons and sliders with no external sensing IC. The 50 MHz core runs the mTouch library and reports via I2C, SPI, or UART. PPS frees the touch-sense channels to any digital I/O, dramatically simplifying PCB routing for front-panel keyboards. The on-chip temperature sensor compensates for thermal drift in touch baselines, while the 128 KB operating voltage accommodates up to 16 buttons and 4 sliders on the same firmware image. The 32 KB SRAM retains runtime gesture data without needing an external EEPROM.
Recommended
Low-Power IoT Sensor Nodes
Drawing less than 0.5 mA/MHz at full 50 MHz, the PIC32MX150F128B-50I/ML fits battery-powered sensor nodes that spend most of their life in sleep. Sleep currents in the low-microamp range (per family datasheet DS60001168) plus peripheral wake on UART, I2C, and capacitive touch let the device run for years on a coin cell. The 10-bit ADC reads up to 16 analog sensor channels, while PPS routes UART, I2C, and SPI peripherals to the same physical pins as needed by the host MCU. The 28-QFN (6x6) exposed-pad package keeps the PCB footprint compact, with inside-the-battery-pack sensor hubs benefiting from the Industrial -40C to +85C grade.
Recommended
Motor Control and PWM Drivers
The PIC32MX150F128B-50I/ML delivers precise motor control thanks to its 1 ns Input Capture resolution, five 16-bit timers, and the high-MIPS MIPS32 M4K core. Hardware PWM drives MOSFET half-bridges for fans, pumps, and small BLDC motors, while the 1 ns timer measures back-EMF zero-crossings without time lag, resulting in accurate commutation. PPS relocates PWM outputs and feedback inputs to minimize PCB layout issues and reduce ground bounce. The Industrial -40C to +85C grade enables mounting in motor housings where ambient temperatures swing widely. The 32 KB SRAM stores per-cycle feedback data, while 128 KB operating voltage supports lookup tables for sinusoidal commutation.
Recommended
Consumer Peripherals and Wearables
The PIC32MX150F128B-50I/ML is a strong fit for compact consumer peripherals and wearables where small PCB footprint and reasonable compute matter. The 28-QFN (6x6) package fits inside tiny enclosures, while the 50 MHz MIPS32 M4K core runs simple BLE-host proxy logic, LED-matrix drivers via PMP, or fitness-sensor fusion. PPS remapping lets engineers relocate I/O across PCB revisions without re-spinning the firmware, while the on-chip temperature sensor monitors battery or skin temperature. Inside the Industrial -40C to +85C range, the device tolerates body-worn heating and outdoor sports use. The 128 KB Flash holds feature-rich UI firmware and BLE-stack drivers.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX150F128B-50I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX150F128B-I/ML | PIC32MX150F128BT-V/ML | PIC32MX250F128B-50I/ML | PIC32MX150F128B-50I/SO | PIC32MX150F128B-50I/SP |
|---|---|---|---|---|---|---|
| Package | 28-pin QFN (6x6 mm) with EP | 28-pin QFN (6x6) - same | 28-pin QFN (6x6) - same | 28-pin QFN (6x6) - same | 28-pin SOIC - different mechanical | 28-pin SPDIP - different mechanical |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum CPU Speed | 50 MHz | 40 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Automotive AEC-Q100 -40C to +105C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
| AEC-Q100 Qualified | No | No | Yes | No | No | No |
| Tube Quantity (typical) | Tube (per /ML code) | Tube | Tape and Reel | Tube | Tube | Tube |
| Core Architecture | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit |
Key Differentiators
- 50 MHz CPU speed with same pinout as 40 MHz variant (vs PIC32MX150F128B-I/ML)
- Automotive AEC-Q100 grade available in same package (vs PIC32MX150F128BT-V/ML)
- Compact 28-QFN 6x6 mm vs larger SOIC/SPDIP packages (vs PIC32MX150F128B-50I/SO)
Design Notes
Estimated: at 50 MHz full load, the PIC32MX150F128B-50I/ML dissipates roughly 25 mA from VDD (per < 0.5 mA/MHz figure), or about 80 mW. The 28-QFN exposed pad must be soldered to a continuous PCB ground pour of at least 1 square inch to keep junction temperature within the Industrial -40C to +85C envelope. For enclosed / wearable designs, route thermal vias under the EP for improved heat transfer to internal ground planes.
Place a 0.1 uF ceramic decoupling capacitor as close as possible to each VDD pin (pin 14) with a wide, short loop. Add a bulk 10 uF tantalum or ceramic capacitor near the device for transient response. Keep the crystal oscillator traces (OSC1 / OSC2, pins 11-12) short, symmetric, and surrounded by a ground guard ring to minimize EMI. Avoid running high-speed USB D+/D- traces parallel to the crystal.
Peripheral Pin Select (PPS) mappings MUST be configured at startup before any peripheral is enabled, otherwise functions will not appear on the assigned pins. The exposed thermal pad is electrically ground but also thermal - do not leave it floating. JTAG and ICSP share pins with Port B/C; if both programming and runtime GPIO are required on the same pins, route carefully. The /ML suffix ships in tubes (typically 73 pcs), not reels - if your assembly line expects tape & reel, order the /TR suffix instead.
Compliance Information
RoHS compliant per Microchip product page. -50I/ML is Industrial grade; AEC-Q100 not applicable - choose -V/-50I-V/ML variant for automotive applications.
