PIC32MX150F128B-I/SP - 32-bit MCU 128KB Flash 40MHz 28-SPDIP
MPN: PIC32MX150F128B-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.92 | $5.92 |
| 10 | $5.33 | $53.30 |
| 100 | $4.74 | $474.00 |
| 500 | $4.15 | $2,075.00 |
| 1,000 | $3.56 | $3,560.00 |
PIC32MX150F128B-I/SP Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, volatile and non-volatile memory, and programmable peripherals. The PIC32MX family represents Microchip's 32-bit MIPS-based line that bridges 8/16-bit PIC and ARM Cortex-M designs, offering higher performance while retaining PIC-style peripheral integration. Within the system hierarchy, the MCU sits below power management ICs and above discrete logic, serving as the central processing node in embedded designs.
Key specifications include a 2.3 V to 3.6 V supply range, 21 general-purpose I/O pins, five 16-bit timers (plus two 32-bit timers), a 10-bit 1 Msps ADC with up to 13 channels, and on-chip temperature measurement. USB 2.0 full-speed device support and a 4-channel DMA controller round out the connectivity and throughput features. The CTMU enables cost-effective capacitive touch sensing and precise time-of-flight measurements without external timing ICs.
Typical applications span industrial control panels, consumer audio devices, USB peripherals, low-cost graphics HMIs with PMP-driven TFT or OLED displays, capacitive touch user interfaces, and sensor aggregation nodes. The 28-SPDIP package supports easy breadboarding and hand-rework for prototypes and educational designs.
Designers should follow the datasheet's recommended decoupling (100 nF + 1 µF close to VDD/AVDD) and observe the 3.6 V absolute maximum supply limit. The PPS feature remaps peripherals to most I/O pins, simplifying board layout and BOM reuse across PIC32MX1XX/2XX family variants.
This page consolidates real-time distributor pricing, drop-in same-package alternatives, and practical design notes that are not collocated in the manufacturer datasheet.
Drop-in alternatives for PIC32MX150F128B-I/SP — 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-I/SP (same form factor and footprint) — differing in Package, ADC, Timers, Operating Temperature, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX150F128B-I/SP
✅ Drop-In✓ In Stock
$3.56 / Unit
View Datasheet →PIC32MX150F128B-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX250F128B-I/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.31 / Unit
View Datasheet →PIC32MX170F256B-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX130F128B-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX150F128B-I/SP Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Clock | 40 MHz |
| Program Flash Memory | 128 KB (128K x 8) |
| SRAM | 32 KB |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| I/O Pins | 21 |
| Package | 28-SPDIP (Skinny Plastic DIP) |
| Mounting Type | Through-Hole |
| ADC | 10-bit, up to 13 channels, 1 Msps |
| Timers | Five 16-bit + Two 32-bit |
| Communication | 2x I2S/SPI, 2x UART, 2x I2C, USB 2.0 FS Device |
| Special Features | Peripheral Pin Select (PPS), Parallel Master Port (PMP), CTMU (mTouch), 4-ch DMA |
| Active Current | < 0.5 mA/MHz |
| On-chip Temperature Sensor | Yes |
| RoHS Status | Compliant |
| MSL Level | 1 (Not Moisture Sensitive) |
PIC32MX150F128B-I/SP Pin Configuration
| Pin 1 | VDD — Positive supply voltage (2.3-3.6 V) |
| Pin 2 | RA0 — Port A bit 0 / AN0 / CVREF+ |
| Pin 3 | RA1 — Port A bit 1 / AN1 / CVREF- |
| Pin 4 | RB0 — Port B bit 0 / PGED1 / AN2 |
| Pin 5 | RB1 — Port B bit 1 / PGEC1 / AN3 |
| Pin 6 | RB2 — Port B bit 2 / AN4 / CTMU |
| Pin 7 | RB3 — Port B bit 3 / AN5 / CTMU |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RB4 — Port B bit 4 / AN6 / SDA2 |
| Pin 10 | RB5 — Port B bit 5 / AN7 / SCL2 |
| Pin 11 | RB6 — Port B bit 6 / PGEC2 / AN8 |
| Pin 12 | RB7 — Port B bit 7 / PGED2 / AN9 |
| Pin 13 | RB8 — Port B bit 8 / AN10 |
| Pin 14 | RB9 — Port B bit 9 / AN11 |
| Pin 15 | RB10 — Port B bit 10 / AN12 |
| Pin 16 | RB11 — Port B bit 11 / AN13 |
| Pin 17 | RC0 — Port C bit 0 |
| Pin 18 | RC1 — Port C bit 1 |
| Pin 19 | RC2 — Port C bit 2 |
| Pin 20 | RC3 — Port C bit 3 |
| Pin 21 | RC4 — Port C bit 4 / D- |
| Pin 22 | RC5 — Port C bit 5 / D+ |
| Pin 23 | RC6 — Port C bit 6 |
| Pin 24 | RC7 — Port C bit 7 |
| Pin 25 | RC8 — Port C bit 8 |
| Pin 26 | RC9 — Port C bit 9 |
| Pin 27 | AVSS — Analog ground |
| Pin 28 | AVDD — Analog positive supply (2.3-3.6 V) |
Typical Applications
PIC32MX150F128B-I/SP is suitable for 6 applications: Industrial Control & HMI, USB Audio / Consumer Audio Device, Capacitive Touch User Interface (mTouch), USB HID / CDC Peripheral Dongle, Low-Cost Graphics Display / PMP HMI, Sensor Aggregation / IoT Edge Node.
Industrial Control & HMI
The PIC32MX150F128B-I/SP fits industrial control panels because its 40 MHz MIPS M4K core delivers enough headroom for real-time control loops while PPS lets designers remap peripherals for clean PCB routing. The Parallel Master Port (PMP) directly drives character or small graphic TFT/OLED displays without an external graphics controller, reducing BOM cost by $1-2 per node. With 21 GPIOs, the MCU handles keypad scanning, rotary encoder inputs, and indicator LEDs without additional I/O expanders. The 2.3-3.6 V supply aligns with 3.3 V industrial backplanes, and the -40 to +85 C operating range suits factory-floor enclosures. Industrial designs leverage the CTMU for sealed capacitive keypads, eliminating mechanical switches in dusty environments. Same-package footprint across PIC32MX150/170/250 family variants enables easy migration to higher Flash/SRAM as firmware grows.
Recommended
USB Audio / Consumer Audio Device
The PIC32MX150F128B-I/SP is well-suited for USB audio peripherals because it integrates a USB 2.0 full-speed device controller and two I2S/ SPI modules for codec interfacing. Microchip's MPLAB Harmony USB Audio class stack enumerates as a standard USB speaker or microphone, eliminating custom driver work on Windows, macOS, and Linux hosts. The 32 KB SRAM accommodates stereo 16-bit audio buffering at 48 kHz with comfortable margin, while 128 KB Flash hosts both the Harmony framework and application DSP code. Designers save a separate USB-to-I2S bridge IC worth $0.80-$1.50. The CTMU can add touch-controlled volume or play/pause inputs. Compared to discrete USB+I2S bridge solutions, this PIC32 design uses less board area and supports field firmware updates over USB.
Recommended
Capacitive Touch User Interface (mTouch)
The PIC32MX150F128B-I/SP is purpose-built for capacitive touch UI through its on-chip CTMU, which delivers 1 ns time-resolution measurements of touch electrode charge/discharge cycles. Buttons, sliders, and proximity sensors are implemented entirely in firmware, removing $0.30-$0.50 per node in dedicated touch ICs and reducing PCB area. The mTouch library supports both self- and mutual-capacitance topologies, enabling designs behind 5 mm acrylic or 2 mm glass overlays. With 21 GPIOs, the MCU can drive up to 16 touch electrodes plus LED feedback channels without expanders. The -40 to +85 C range supports sealed kitchen-appliance, automotive-cabin, and outdoor IoT panels. PPS flexibility keeps sensor traces short by allowing the CTMU to be remapped to adjacent pins.
Recommended
USB HID / CDC Peripheral Dongle
The PIC32MX150F128B-I/SP makes an excellent USB HID or CDC peripheral because the integrated USB 2.0 FS device transceiver removes the need for an external PHY or voltage-level translator. With Microchip's MLA/Harmony stacks, the MCU enumerates as keyboards, mice, game controllers, custom HID, or virtual COM ports without commercial licensing fees. 128 KB Flash is sufficient for HID report descriptors plus application logic, while 32 KB SRAM handles double-buffered HID reports. The 28-SPDIP package supports hand-solderable prototypes and educational kits. PPS allows USB-related signals to share pins with general-purpose I/O, simplifying dongle PCB designs. Compared to 8-bit PIC16 designs, the M4K core delivers 10x the throughput for HID descriptor parsing.
Recommended
Low-Cost Graphics Display / PMP HMI
The PIC32MX150F128B-I/SP drives small graphics displays through its Parallel Master Port (PMP), which supports 8-bit data plus control lines to character LCDs, TFT, and OLED panels up to QVGA resolution. The PMP interface eliminates the need for an external display controller IC, cutting BOM by $1-$3 per unit. The 40 MHz core sustains full-screen refresh rates even with anti-aliased fonts and bitmap rendering. 32 KB SRAM accommodates double-buffered frame regions while 128 KB Flash holds font tables and UI assets. Designers use Microchip's MLA graphics library for primitives, widgets, and touch integration. The 28-SPDIP variant eases breadboard development of HMI prototypes before committing to QFN for production.
Recommended
Sensor Aggregation / IoT Edge Node
The PIC32MX150F128B-I/SP serves as an IoT edge aggregation node thanks to its 10-bit 1 Msps ADC with 13 input channels, 4-channel DMA for sensor streaming, and on-chip temperature sensor. Multiple analog sensors (temperature, pressure, light, flow) connect directly without external muxes or ADCs. The CTMU supports high-resolution timing of ultrasonic or time-of-flight sensors for distance measurement. With UART, I2C, and SPI interfaces, the MCU aggregates wired sensor buses and bridges them to USB or wireless modules. The < 0.5 mA/MHz active current keeps battery life reasonable for solar-powered IoT installations. PPS flexibility lets designers keep analog traces short by remapping digital peripherals away from sensitive analog inputs.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX150F128B-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX150F128B-I/SO | PIC32MX250F128B-I/SP | PIC32MX170F256B-I/SP | PIC32MX130F128B-I/SP |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP | 28-SOIC | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same |
| CPU Speed | 40 MHz | 40 MHz | 50 MHz | 50 MHz | 40 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB | 256 KB | 128 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 64 KB | 32 KB |
| Supply Voltage | 2.3-3.6 V | 2.3-3.6 V | 2.3-3.6 V | 2.3-3.6 V | 2.3-3.6 V |
| USB Controller | USB 2.0 FS Device | USB 2.0 FS Device | USB 2.0 FS Device + Host | USB 2.0 FS Device | USB 2.0 FS Device |
| CTMU / mTouch | Yes | Yes | Yes | Yes | Yes |
| I/O Pins | 21 | 21 | 21 | 21 | 21 |
Key Differentiators
- Through-hole 28-SPDIP package for easy prototyping (vs PIC32MX150F128B-I/ML (28-QFN SMD))
- Same die across SPDIP, SOIC, and QFN packages (vs PIC32MX150F128B-I/SO (28-SOIC))
- Upgradable to 50 MHz with same 28-SPDIP footprint (vs PIC32MX250F128B-I/SP)
- Drop-in upgrade path to 256 KB Flash (vs PIC32MX170F256B-I/SP)
Design Notes
Place a 10 µF bulk + 100 nF ceramic decoupling capacitor pair within 5 mm of VDD/AVDD pins. Per the PIC32MX1XX/2XX family datasheet (DS60001168L), the analog and digital domains share a common supply but require separate decoupling to avoid ADC reference noise. Do not exceed 3.6 V absolute maximum; use a 3.3 V LDO with ±2% tolerance for clean USB bus-powered designs.
Route the USB D+/D- pair (RC4/RC5) as a 90-ohm differential pair with matched length within 2 mm. Keep the traces away from switching regulator inductors or PWM signals. For 28-SPDIP through-hole designs, provide a ground plane on the bottom layer and stitch vias around the MCU perimeter to reduce radiated EMI from the 40 MHz system clock.
Do not omit the 100 nF cap on AVDD - the 10-bit ADC readings will drift by 5-10 LSB without proper analog decoupling. Ensure the MCLR reset pin has a 10 kohm pull-up to VDD and a 100 nF cap to ground for clean reset, as documented in DS60001168L. PPS remapping must be configured before enabling the peripheral; missing this step is a frequent source of 'peripheral doesn't work' debug sessions.
Keep CTMU touch sensor traces short (< 50 mm) and avoid routing them parallel to noisy digital signals. Place a guard ring (ground trace) around touch electrodes for moisture immunity. The 28-SPDIP footprint gives convenient prototyping spacing; for production SMT migration, use PIC32MX150F128B-I/ML (28-QFN) as a drop-in silicon equivalent but expect a layout rework for the QFN land pattern.
Compliance Information
RoHS and REACH compliant per Microchip product page; lead-free matte-tin finish. Not AEC-Q100 qualified - for automotive, choose the PIC32MX150F128B-I/SP AEC-Q100 equivalent (where available) or migrate to PIC32MX1xx-V family.
