PIC32MX150F128B-50I/SO - 50MHz 32-bit MCU, 128KB Flash | Microchip
MPN: PIC32MX150F128B-50I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.96 | $4.96 |
| 10 | $4.47 | $44.70 |
| 100 | $3.97 | $397.00 |
| 500 | $3.58 | $1,790.00 |
| 1,000 | $3.18 | $3,180.00 |
PIC32MX150F128B-50I/SO Overview
A 32-bit microcontroller (MCU) is a microprocessor-based system-on-chip that integrates a CPU core, program memory (Flash), data memory (SRAM), and a wide set of on-chip peripherals such as timers, communication controllers, and analog blocks. Microcontrollers sit at the top of the embedded-computing hierarchy: MCU -> microcontroller -> embedded processor -> semiconductor. The PIC32MX1XX/2XX family specifically addresses cost-sensitive 32-bit designs where an 8-bit PIC or 16-bit dsPIC is under-powered but a Cortex-M4 class device is over-spec or over-priced.
Key features include the Peripheral Pin Select (PPS) remapping engine for flexible signal routing, two I2S/SPI modules for codec and serial audio, a Parallel Master Port (PMP) for graphics and external memory, and a Charge Time Measurement Unit (CTMU) that supports mTouch capacitive touch buttons plus 1 ns high-resolution time measurement. The on-chip 10-bit ADC and internal temperature sensor round out the analog toolset. According to the Microchip PIC32MX1XX/2XX datasheet, the device operates from 2.3 V to 3.6 V with dedicated 5V-tolerant digital I/O pins for mixed-voltage designs.
Architecturally the PIC32MX150 uses a single-cycle MIPS32 M4K integer pipeline with hardware multiply/divide, a 5-stage prefetch cache, and an integrated 8 MHz internal FRC oscillator with PLL. Peripheral Pin Select (PPS) decouples digital peripheral functions from physical pin assignments, allowing designers to remap UART, SPI, and timer I/O on the fly and simplify PCB routing. The CTMU block provides constant-current sources for precise time-of-flight measurement, enabling both capacitive touch sensing and high-resolution pulse timing without external timing circuits.
Typical applications include USB audio peripherals, low-cost graphics HMI with PMP-driven LCDs, industrial control panels with mTouch buttons, sensor hubs, and consumer devices requiring 32-bit performance with USB device connectivity. The wide-body 28-SOIC footprint eases hand-prototyping and two-layer PCB assembly.
When designing with this part, allocate the USB DP/DPU pins carefully because they are not 5V-tolerant; add a proper ESD/EMI network and series resistor on D+/D-. The wide-body SOIC package has noticeably higher thermal resistance than QFN equivalents, so for high-pin-count 50-MHz workloads consider PIC32MX150F128B-I/ML variants if the PCB permits the QFN footprint.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC32MX150F128B-50I/SO — 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/SO (same form factor and footprint) — differing in Package, Operating Voltage, ADC, Core Architecture, DMIPS Performance.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX150F128B-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX250F128B-50I/SO
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →PIC32MX170F256B-50I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX130F128B-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX230F256B-50I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX150F128B-50I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Clock | 50 MHz |
| Program Memory (Flash) | 128 KB (128K x 8) |
| Data Memory (SRAM) | 32 KB |
| Operating Voltage | 2.3 V to 3.6 V |
| I/O Pins | 21 |
| ADC | 10-bit |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 28-pin SOIC (SO), wide-body 300 mil |
| USB | USB 2.0 Full-Speed Device |
| SPI/I2S Modules | 2 |
| I2C Modules | 2 |
| UART Modules | 2 |
| PMP (Parallel Master Port) | Yes |
| CTMU (Capacitive Touch / Timing) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| RoHS Status | Compliant |
| MSL Level | 1 |
PIC32MX150F128B-50I/SO Pin Configuration
| Pin 1 | MCLR — Master clear (reset) input; drive low to reset the device |
| Pin 2 | RA0 — General-purpose I/O / analog input / PPS remappable |
| Pin 3 | RA1 — General-purpose I/O / analog input / PPS remappable |
| Pin 4 | RB0 — General-purpose I/O / PGED1 programming data |
| Pin 5 | RB1 — General-purpose I/O / PGEC1 programming clock |
| Pin 6 | RB2 — General-purpose I/O / analog input |
| Pin 7 | RB3 — General-purpose I/O / analog input |
| Pin 8 | RB4 — General-purpose I/O |
| Pin 9 | RB5 — General-purpose I/O |
| Pin 10 | RB6 — General-purpose I/O |
| Pin 11 | VDD — Positive supply voltage (2.3 V to 3.6 V) |
| Pin 12 | VSS — Ground reference |
| Pin 13 | RB7 — General-purpose I/O |
| Pin 14 | RB8 — General-purpose I/O |
| Pin 15 | RB9 — General-purpose I/O / USB D+ |
| Pin 16 | RB10 — General-purpose I/O / USB D- |
| Pin 17 | RB11 — General-purpose I/O |
| Pin 18 | RB12 — General-purpose I/O |
| Pin 19 | RB13 — General-purpose I/O |
| Pin 20 | RB14 — General-purpose I/O |
| Pin 21 | RB15 — General-purpose I/O |
| Pin 22 | RC0 — General-purpose I/O |
| Pin 23 | RC1 — General-purpose I/O |
| Pin 24 | RC2 — General-purpose I/O |
| Pin 25 | RC3 — General-purpose I/O |
| Pin 26 | RC4 — General-purpose I/O |
| Pin 27 | VSS — Ground reference |
| Pin 28 | VDD — Positive supply voltage (2.3 V to 3.6 V) |
Typical Applications
PIC32MX150F128B-50I/SO is suitable for 6 applications: USB Audio Peripherals (Speakers, Headsets, DACs), Graphics HMI with PMP-Driven LCDs, mTouch Capacitive Touch Panels, Industrial Sensor Hubs and Modbus Gateways, USB HID and Consumer Devices, Low-Cost Data Loggers with USB Streaming.
USB Audio Peripherals (Speakers, Headsets, DACs)
The PIC32MX150F128B-50I/SO is a strong fit for USB audio class 1.0 peripherals because it pairs an integrated Full-Speed USB 2.0 device controller with two I2S/SSP modules operating at audio sample rates. At 50 MHz the MIPS32 M4K core drives a USB isochronous endpoint at 48 kHz / 24-bit with sub-millisecond ISR latency, while the 32 KB SRAM holds ping-pong audio buffers without overrun. The 2.3-3.6 V supply rails cleanly off USB VBUS through an LDO, avoiding level shifters. This combination delivers USB headphone amplifiers, USB-to-I2S DAC dongles, and field-recording microphones where cost matters and full-speed bandwidth is sufficient. Microchip's MLA USB audio firmware reduces time-to-market further.
Recommended
Graphics HMI with PMP-Driven LCDs
The PIC32MX150F128B-50I/SO is well-matched to small graphical HMI panels because its Parallel Master Port (PMP) drives 8/16-bit Intel-8080-style LCD controllers directly. The 50 MHz core pumps pixel data into the framebuffer at refresh rates suitable for 128x64 to 320x240 panels, while Peripheral Pin Select (PPS) lets designers route control signals onto convenient GPIO pins for clean 2-layer PCB routing. CTMU simplifies menu navigation via mTouch buttons alongside the LCD. Designers get a single-chip 32-bit HMI solution with 128 KB Flash for GUI assets and 32 KB SRAM for framebuffer compression, all in a hand-solderable wide-body SOIC.
Recommended
mTouch Capacitive Touch Panels
The PIC32MX150F128B-50I/SO's on-chip Charge Time Measurement Unit (CTMU) is purpose-built for Microchip's mTouch capacitive touch library, supporting both self-capacitance buttons and mutual-capacitance sliders with sub-nanosecond timing resolution. The 50 MHz MIPS core runs the touch-scan loop plus the application stack concurrently, while the 28-SOIC footprint keeps white-goods and appliance panels hand-repairable. Designers get 1-32 touch electrodes with no external timing IC, plus the 10-bit ADC for adjacent analog sensors like NTC temperature. This combination is ideal for cooktops, washing machines, and HVAC controllers that need robust touch at low BOM cost.
Recommended
Industrial Sensor Hubs and Modbus Gateways
The PIC32MX150F128B-50I/SO is a strong fit for industrial sensor hubs because its 50 MHz MIPS32 core, dual UART, and USB 2.0 device deliver Modbus RTU, RS-485, and USB CDC bridging in a single chip. The 32 KB SRAM accommodates Modbus transaction buffers plus a small RTOS, while the 10-bit ADC scans 4-20 mA loops with proper input conditioning. The industrial -40C to +85C temperature range supports factory-floor deployment, and the wide-body 28-SOIC withstands hand rework during field servicing. Designers get a compact, low-power hub that bridges field sensors to upstream PLCs or HMIs.
Recommended
USB HID and Consumer Devices
The PIC32MX150F128B-50I/SO is well-suited for USB HID devices such as custom keypads, programmable macro pads, presentation remotes, and game controllers. The Full-Speed USB device plus 21 GPIO plus CTMU let designers support 64+ mechanical keys or 32 touch keys plus LEDs, encoders, and audio cues simultaneously. The 128 KB Flash hosts HID report descriptor plus custom vendor reports, while 32 KB SRAM handles ring buffers for high-rate inputs. Microchip's USB HID stack provides drop-in class drivers, and the wide-body SOIC simplifies hand-prototyping for small-batch custom peripherals.
Recommended
Low-Cost Data Loggers with USB Streaming
The PIC32MX150F128B-50I/SO serves as a data logger brain because its 50 MHz core samples from the 10-bit ADC up to ~1 MSPS aggregate and streams results over USB Full-Speed CDC. The 128 KB Flash stores bootloader plus configuration pages, and 32 KB SRAM buffers burst samples before flushing to the host. The 2.3-3.6 V supply rails from a USB power rail or 3 V coin cell with boost. PPS lets engineers reassign UART or SPI for an external flash or SD-card companion if storage beyond on-chip RAM is needed, making the part a versatile USB-tethered logger for field instrumentation.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX150F128B-50I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX150F128B-I/SO | PIC32MX250F128B-50I/SO | PIC32MX170F256B-50I/SO | PIC32MX130F128B-I/SO | PIC32MX230F256B-50I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (SO, 300 mil) | 28-SOIC (SO, 300 mil) - same | 28-SOIC (SO, 300 mil) - same | 28-SOIC (SO, 300 mil) - same | 28-SOIC (SO, 300 mil) - same | 28-SOIC (SO, 300 mil) - same |
| Max CPU Clock | 50 MHz | 40 MHz | 50 MHz | 50 MHz | 40 MHz | 50 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB | 256 KB | 128 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 64 KB | 32 KB | 16 KB |
| USB | USB 2.0 FS Device | USB 2.0 FS Device | USB 2.0 FS Device | USB 2.0 FS Device | USB 2.0 FS Device | USB 2.0 FS Device |
| I2S Modules | 2 | 2 | 2 | 2 | 2 | 2 |
| Operating Voltage | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Higher CPU clock with full peripheral parity (vs PIC32MX150F128B-I/SO)
- Doubles Flash and SRAM at same speed grade (vs PIC32MX170F256B-50I/SO)
- Drop-in 50 MHz upgrade with extra PMP enhancements (vs PIC32MX250F128B-50I/SO)
Design Notes
Power the PIC32MX150F128B-50I/SO from a clean 3.3 V LDO with at least 100 mA headroom for active USB operation. Place a 10 uF bulk cap plus 100 nF decoupling on each VDD/VSS pair within 5 mm of the pins. USB bus-powered designs must keep total suspend current below 2.5 mA per the USB 2.0 spec; configure the part's regulator and oscillator modes carefully to meet suspend.
Route USB D+ and D- as a 90-ohm differential pair with matching length within 150 mil. Place the 15 k pull-down on D- (device mode) directly at the MCU pin, and add common-mode chokes plus ESD array (e.g. USBLC6-2SC6) close to the connector. The MCLR pin needs a 10 k pull-up to VDD and a 100 nF cap to ground for clean in-circuit serial programming (ICSP).
Do not apply 5 V to non-5V-tolerant pins. The USB D+/D- lines on the PIC32MX150 are 5V-tolerant at the wire side via the analog mux but the digital inputs are clamped; never back-drive voltage onto an unpowered MCU. Also, the PPS register unlock sequence must be executed exactly as documented - forgetting the unlock write-locks the part and bricks the firmware update path until the next POR.
At 50 MHz active, the PIC32MX150F128B-50I/SO draws roughly 25 mA from a 3.3 V rail (less than 0.5 mA/MHz per datasheet), yielding about 80 mW dissipation. The 28-SOIC wide-body has theta_JA near 70 C/W, so worst-case junction rise is only ~6 C above ambient at room temperature - no heatsink required, but adequate copper pour (>= 0.25 sq inch) is recommended for reliability.
When driving PMP parallel LCD buses, add 22-33 ohm series resistors on data and control lines to dampen reflections on cables longer than 50 mm. The 50 MHz core and PMP cycle rate produce edges under 5 ns; without damping, long LCD cables can show ghosting and color fringing on TFT panels. Keep PMP traces short and ground-referenced, and place the connector adjacent to the MCU to minimize stub lengths.
Compliance Information
RoHS and REACH compliant per Microchip product page; conflict-minerals statement available from Microchip. Not AEC-Q100 qualified - choose PIC32MX1XX/2XX AEC-Q100 variants for automotive.
