PIC32MX150F128B-50I/SS - 50MHz 32-bit MCU 128KB Flash | Microchip
MPN: PIC32MX150F128B-50I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.3 | $5.30 |
| 10 | $4.85 | $48.50 |
| 100 | $4.2 | $420.00 |
| 500 | $3.65 | $1,825.00 |
| 1,000 | $3.2 | $3,200.00 |
PIC32MX150F128B-50I/SS Overview
A 32-bit microcontroller (MCU) is a single-chip computer that integrates a 32-bit CPU core, Flash program memory, SRAM data memory, and a rich peripheral set (ADC, timers, communication controllers, GPIO) into one package. MCUs belong to the broader hierarchy of microcontrollers -> embedded processors -> semiconductors, and 32-bit MCUs are typically chosen when 8-bit or 16-bit devices lack the performance, address space, or peripheral mix required by the application.
Key specifications include a 50 MHz maximum CPU clock, 1.56 DMIPS/MHz performance, sub-0.5 mA/MHz active current, a 10-bit 1 Msps ADC with up to 28 channels, two I2S/SPI modules, USB 2.0 full-speed device/host/OTG, a Parallel Master Port (PMP), and Peripheral Pin Select (PPS) for flexible signal routing. The Charge Time Measurement Unit (CTMU) supports mTouch capacitive touch buttons/sliders and provides 1 ns high-resolution time measurement.
Architecturally, the device uses a Harvard-style MIPS32 M4K core with hardware multiply/divide, a 5-stage pipeline, and tightly-coupled prefetch cache to sustain 1.56 DMIPS/MHz at 50 MHz. The wide peripheral integration reduces external component count and PCB area, while the 2.3-3.6 V supply range supports both 3.3 V and battery-powered designs.
Typical applications include consumer electronics with USB connectivity, industrial control with capacitive touch HMIs, low-cost audio playback using I2S codecs, USB graphics terminals using PMP-driven LCDs, sensor hubs, and small-form-factor IoT endpoints that need more headroom than 8-bit MCUs but lower cost than Cortex-M4 parts.
Designers should note that the 28-pin SSOP variant limits available I/O compared to 36/44-pin cousins, so pin allocation matters; PPS allows remapping most digital peripherals to different pins, simplifying PCB layout. Decoupling, ICSP programming header placement, and VDD/VSS pin pairing per the datasheet layout guidelines are critical for noise-free operation.
This page synthesizes distributor pricing as of 2026-10-01, drop-in same-package alternatives from the PIC32MX1xx/2xx family, and practical design notes not found on the manufacturer datasheet cover page.
Drop-in alternatives for PIC32MX150F128B-50I/SS — 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/SS (same form factor and footprint) — differing in ADC, Package, Timers, Operating Temperature, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX250F128B-50I/SS
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →PIC32MX130F128B-50I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX150F128BT-50I/SS
✅ Drop-In✓ In Stock
$3.46 / Unit
View Datasheet →PIC32MX150F128B-I/SS
✅ Drop-In✓ In Stock
$2.65 / Unit
View Datasheet →PIC32MX170F256B-50I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX150F128B-50I/SS Maximum Ratings & Electrical Characteristics
| Core | MIPS32 M4K 32-bit RISC |
| Maximum CPU Clock | 50 MHz |
| Performance | 1.56 DMIPS/MHz |
| Program Flash | 128 KB |
| Data SRAM | 32 KB |
| Supply Voltage | 2.3 V to 3.6 V |
| Active Current | < 0.5 mA/MHz |
| ADC | 10-bit, 1 Msps |
| I2S/SPI Modules | 2 |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| Peripheral Pin Select | Yes (PPS) |
| Parallel Master Port | Yes (PMP) |
| CTMU | Yes (mTouch + 1 ns time measurement) |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 28-pin SSOP (5.30 mm body) |
| RoHS Status | Compliant |
PIC32MX150F128B-50I/SS Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active-low |
| Pin 2 | PGED3/AN0/RPB0 — ICSP data / analog input / GPIO |
| Pin 3 | PGEC3/AN1/RPB1 — ICSP clock / analog input / GPIO |
| Pin 4 | AN2/RPB2/SDA2 — Analog input / GPIO / I2C2 SDA (PPS) |
| Pin 5 | AN3/RPB3/SCL2 — Analog input / GPIO / I2C2 SCL (PPS) |
| Pin 6 | AN4/RPB4 — Analog input / GPIO |
| Pin 7 | AN5/RPB5 — Analog input / GPIO |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/RPA15 — Crystal oscillator input or external clock |
| Pin 10 | OSC2/CLKO/RPA14 — Crystal oscillator output |
| Pin 11 | VDD — Positive supply voltage (2.3-3.6 V) |
| Pin 12 | PGEC1/AN6/RPB6 — ICSP clock / analog / GPIO |
| Pin 13 | PGED1/AN7/RPB7 — ICSP data / analog / GPIO |
| Pin 14 | AN8/RPB8 — Analog input / GPIO |
| Pin 15 | AN9/RPB9 — Analog input / GPIO |
| Pin 16 | TMS/AN10/RPB10 — JTAG TMS / analog / GPIO |
| Pin 17 | TCK/AN11/RPB11 — JTAG TCK / analog / GPIO |
| Pin 18 | TDI/AN12/RPB12 — JTAG TDI / analog / GPIO |
| Pin 19 | VSS — Ground reference |
| Pin 20 | TDO/AN13/RPB13 — JTAG TDO / analog / GPIO |
| Pin 21 | USBID/RPB14 — USB OTG ID / GPIO |
| Pin 22 | VBUS/RPB15 — USB VBUS sense / GPIO |
| Pin 23 | D-/RGMB0 — USB D- differential data |
| Pin 24 | D+/RGMBA1 — USB D+ differential data |
| Pin 25 | RPA0 — GPIO / peripheral function via PPS |
| Pin 26 | RPA1 — GPIO / peripheral function via PPS |
| Pin 27 | VSS — Ground reference |
| Pin 28 | VDD — Positive supply voltage (2.3-3.6 V) |
Typical Applications
PIC32MX150F128B-50I/SS is suitable for 6 applications: USB Audio Playback Device, Capacitive Touch HMI Panel, Industrial Control with PMP Graphic LCD, USB Sensor Hub / Data Logger, Low-Cost IoT Endpoint with USB Diagnostics, Consumer Electronics with Audio Playback.
USB Audio Playback Device
The PIC32MX150F128B-50I/SS suits USB audio playback peripherals because it integrates a USB 2.0 Full-Speed OTG controller plus two I2S/SPI modules that drive external DACs such as the PCM5102A. At 50 MHz the MIPS32 M4K core delivers 78 DMIPS, enough to handle USB isochronous streaming and on-the-fly sample-rate conversion. The 32 KB SRAM holds USB endpoint buffers and PCM ring buffers without external memory. A typical design uses the MCU as USB Device, streams PCM via I2S to the DAC, and uses one timer for PLL-free MCLK generation via PWM. Compared to a Cortex-M0 solution, the PIC32 path eliminates an external crystal for many DACs.
Recommended
Capacitive Touch HMI Panel
The PIC32MX150F128B-50I/SS includes the CTMU peripheral supporting mTouch capacitive touch buttons and sliders, ideal for industrial HMIs replacing mechanical switches. The CTMU provides 1 ns time measurement resolution, enabling reliable proximity and moisture-compensated touch sensing with no external timer IC. At 50 MHz the core services 20+ touch channels at 100 Hz scan rate while still driving a UART-based HMI link. The wide 2.3-3.6 V supply range supports 3.3 V industrial backplanes. Designs use PPS to remap the CTMU outputs and free analog pins for ADC-based temperature compensation.
Recommended
Industrial Control with PMP Graphic LCD
The PIC32MX150F128B-50I/SS Parallel Master Port (PMP) interfaces directly to graphical LCDs and external parallel memory, enabling low-cost graphic terminals and operator panels. At 50 MHz the core sustains 78 DMIPS, easily rendering menus over an 8-bit PMP bus to a 320x240 QVGA LCD. The 128 KB Flash stores fonts and bitmaps; 32 KB SRAM accommodates frame buffers in partial-update schemes. PPS allows flexible assignment of PMP control signals (RD, WR, RS, CS) to free digital I/O for keypad scanning.
Recommended
USB Sensor Hub / Data Logger
The PIC32MX150F128B-50I/SS USB OTG controller combined with its 1 Msps 10-bit ADC enables compact USB sensor hubs and data loggers. The MIPS32 M4K core at 50 MHz samples up to 1 Msps while running USB CDC virtual COM port firmware. The 128 KB Flash hosts USB stack plus sensor-processing code; 32 KB SRAM serves as ring buffer for USB-to-UART or USB-to-I2C bridging. A typical design reads analog sensors, formats data via USB, and uses PPS to map UART/I2C to convenient PCB locations.
Recommended
Low-Cost IoT Endpoint with USB Diagnostics
The PIC32MX150F128B-50I/SS fits IoT endpoints needing USB for firmware update or diagnostics while staying below Cortex-M4 cost. The 50 MHz core, 128 KB Flash, and 32 KB SRAM handle MQTT-over-TCP via external Wi-Fi module (e.g., ATWINC1500) over SPI, with USB accessible for provisioning. Sub-0.5 mA/MHz active current keeps sleep-mode battery life competitive. PPS remaps SPI to a 4-wire bus alongside the Wi-Fi IRQ, freeing GPIOs for sensor I/O.
Recommended
Consumer Electronics with Audio Playback
The PIC32MX150F128B-50I/SS targets consumer audio accessories such as USB speakers, headphones with DACs, and Bluetooth audio dongles that stream decoded PCM over I2S. The two I2S modules support simultaneous input and output for full-duplex headset designs. USB Full-Speed handles UAC1 audio class at 48 kHz/16-bit without compression. Wide 2.3-3.6 V operation supports direct Li-Ion battery use, and PPS remaps the audio bit-clock to MCU pins that route cleanly to the DAC PCB side.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX150F128B-50I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX250F128B-50I/SS | PIC32MX130F128B-50I/SS | PIC32MX150F128BT-50I/SS | PIC32MX150F128B-I/SS | PIC32MX170F256B-50I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SSOP | 28-pin SSOP (same) | 28-pin SSOP (same) | 28-pin SSOP (same) | 28-pin SSOP (same) | 28-pin SSOP (same) |
| Maximum CPU Clock | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 40 MHz | 50 MHz |
| Program Flash | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 256 KB |
| Data SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 64 KB |
| USB OTG | Yes (USB 2.0 FS OTG) | Yes | No | Yes | Yes | Yes |
| CTMU / mTouch | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- USB OTG on a 28-pin SSOP 50 MIPS MCU (vs PIC32MX130F128B-50I/SS)
- Balanced Flash/RAM at lowest cost point with USB (vs PIC32MX170F256B-50I/SS)
- Industrial temperature grade on USB-capable 28-pin SSOP (vs PIC32MX150F128BT-50I/SS)
Design Notes
Place a 10 uF bulk capacitor plus a 0.1 uF ceramic decoupling cap adjacent to every VDD pin (pins 11 and 28 on the 28-pin SSOP). The PIC32MX150F128B-50I/SS draws transient bursts during USB packet transmit, so insufficient decoupling causes brownouts on VDD and USB enumeration failures. A ferrite bead on VDD is recommended when the rail is shared with RF or noisy digital circuitry.
Locate the ICSP connector so that PGEC1/PGED1 (pins 12/13) are within 100 mm of the programmer. Microchip recommends a 4.7 kohm pull-up on MCLR (pin 1) with a 100 nF cap to ground for noise immunity. Trace the USB D+/D- (pins 23/24) as a 90 ohm differential pair; keep total length under 50 mm and avoid splitting reference planes under the pair.
Do not forget to configure the PPS registers before using remapped peripherals - peripherals default to pins that may not be physically routed on the 28-pin SSOP. Always verify the ANSEL register clears analog bits on pins used for digital I/O. Per the Microchip PIC32MX1xx/2xx family datasheet (DS60001168L), the 28-pin variant exposes fewer peripherals simultaneously than 36/44-pin cousins, so plan pin allocation before writing code.
Compliance Information
RoHS and REACH compliant per Microchip product declaration. Industrial -40C to +85C temperature grade; not AEC-Q100 qualified - not intended for automotive safety-critical applications.
