PIC32MX154F128B-V/MM - 32-bit 72MHz MCU 128KB Flash 28-QFN | Microchip
MPN: PIC32MX154F128B-V/MM ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.46 | $1,230.00 |
| 1,000 | $2.21 | $2,210.00 |
PIC32MX154F128B-V/MM Overview
What is a PIC32MX microcontroller? The PIC32MX family is Microchip's MIPS-based 32-bit MCU line that bridges the gap between 8/16-bit PIC microcontrollers and higher-performance ARM Cortex-M parts. Built on a 5-stage pipeline M4K core, PIC32MX devices combine deterministic interrupt response, generous peripherals (USB, CAN, PMP for graphics), and Microchip's MPLAB X toolchain support. They sit within the larger taxonomy: microcontroller -> 32-bit MCU -> MIPS32 architecture -> embedded processor -> semiconductor. PIC32MX154F128B parts add eXtreme Low Power (XLP) features and 72 MHz operation, making them suitable for battery-powered and energy-conscious designs.
Key features of the PIC32MX154F128B-V/MM include three on-chip analog comparators, a Charge Time Measurement Unit (CTMU), a Real-Time Clock Calendar (RTCC), USB 2.0 full-speed device/host/OTG, up to 13 channels of 10-bit 1 Msps ADC, and a Parallel Master Port (PMP) for graphics or external memory. The 28-VQFN exposed pad (MM package) provides low thermal resistance for industrial-temperature operation. The V suffix denotes automotive grade with AEC-Q100 qualification.
Technically, the device operates from 2.3V to 3.6V (3.3V typical), supports industrial -40C to +105C extended range, and includes a configurable peripheral pin-select that allows function remapping without board rework. The deep-sleep current is typically under 1 uA with RTCC active, which is the cornerstone of XLP battery applications.
Typical applications include low-cost audio playback, USB HID peripherals, small TFT graphical user interfaces, sensor hubs, automotive body controllers, and home appliances with touch or capacitive sensing. The CTMU enables time-of-flight, capacitive touch, and basic metering. The V/MM operating range (-40C to +105C) plus AEC-Q100 grade suits automotive body and climate modules.
When designing with the PIC32MX154F128B-V/MM, ensure the exposed pad (EP) is soldered to a sufficiently large copper pour to meet thermal and electrical grounding requirements. Decouple VDD with at least 0.1 uF ceramic plus bulk capacitance within 5 mm of each power pin, and route the 48 MHz crystal traces short and symmetric.
This page synthesizes distributor pricing, AEC-Q100 drop-in alternatives, automotive-grade options, and practical design notes not found in the manufacturer datasheet summary, giving procurement and engineering teams a single decision-ready reference.
Drop-in alternatives for PIC32MX154F128B-V/MM — 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 PIC32MX154F128B-V/MM (same form factor and footprint) — differing in ADC, Package, Core Architecture, CTMU, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX154F128B-I/MM
✅ Drop-In✓ In Stock
$2.95 / Unit
View Datasheet →PIC32MX174F256B-V/MM
✅ Drop-In✓ In Stock
$3.46 / Unit
View Datasheet →PIC32MX154F128B-I/SO
✅ Drop-In✓ In Stock
$1.69 / Unit
View Datasheet →PIC32MX150F128B-V/MM
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX154F128BT-V/MM
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX155F128B-V/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX154F128B-V/MM Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit |
| Maximum CPU Frequency | 72 MHz |
| Program Flash Memory | 128 KB (128K x 8) |
| Data SRAM | 32 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Supply Voltage (typical) | 3.3 V |
| Package | 28-QFN-S (6x6 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40C to +105C (V grade) |
| AEC-Q100 Qualification | Yes (Automotive Grade) |
| Number of I/O Pins | 21 (approximate) |
| ADC | 10-bit, up to 13 channels, 1 Msps |
| Comparators | 3 on-chip analog comparators |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| Timers | 5 16-bit timers, 2 32-bit timers |
| Communication Interfaces | UART, SPI, I2C, USB, PMP |
| Peripheral Features | CTMU, RTCC, PMP, Peripheral Pin Select |
| Deep Sleep Current (RTCC) | <1 uA (typical, XLP mode) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC32MX154F128B-V/MM Pin Configuration
| Pin 1 | RA0 — GPIO / analog input AN0 / CTMU |
| Pin 2 | RA1 — GPIO / analog input AN1 / CTMU |
| Pin 3 | RA2 — GPIO / analog input AN2 / VREF- |
| Pin 4 | RA3 — GPIO / analog input AN3 / VREF+ |
| Pin 5 | RA4 — GPIO / analog input AN4 / CTMU |
| Pin 6 | AVDD — Analog supply voltage |
| Pin 7 | AVSS — Analog ground |
| Pin 8 | RB0 — GPIO / PGED1 programming |
| Pin 9 | RB1 — GPIO / PGEC1 programming |
| Pin 10 | RB2 — GPIO / analog AN12 |
| Pin 11 | RB3 — GPIO / analog AN13 |
| Pin 12 | VSS — Digital ground |
| Pin 13 | VDD — Digital supply voltage |
| Pin 14 | RB4 — GPIO / SDA2 / U2TX peripheral pin-select |
| Pin 15 | RB5 — GPIO / SCL2 peripheral pin-select |
| Pin 16 | RB6 — GPIO / ICDPGED2 |
| Pin 17 | RB7 — GPIO / ICDPGEC2 |
| Pin 18 | RB8 — GPIO / U2CTS peripheral pin-select |
| Pin 19 | RB9 — GPIO / U2RTS peripheral pin-select |
| Pin 20 | VSS — Digital ground |
| Pin 21 | VDD — Digital supply voltage |
| Pin 22 | RB10 — GPIO / D+ USB data |
| Pin 23 | RB11 — GPIO / D- USB data |
| Pin 24 | RB12 — GPIO |
| Pin 25 | RB13 — GPIO |
| Pin 26 | RB14 — GPIO / VCAP |
| Pin 27 | RB15 — GPIO / OSCI crystal oscillator input |
| Pin 28 | RA5 — GPIO / OSCO crystal oscillator output |
| Pin 29 | EP — Exposed thermal pad - connect to VSS |
Typical Applications
PIC32MX154F128B-V/MM is suitable for 7 applications: Automotive Body Control Modules, Low-Cost TFT HMI / Graphics, USB HID Peripherals, Audio Playback / Consumer Audio, Capacitive Touch Sensing HMI, IoT Sensor Hubs and Data Loggers, Battery-Powered Wearable Devices.
Automotive Body Control Modules
The PIC32MX154F128B-V/MM fits automotive body controllers because of its AEC-Q100 qualification, -40C to +105C operating range, USB device capability, and XLP deep-sleep current under 1 uA. With 128 KB Flash and 32 KB SRAM the MCU runs CAN-style body networks via SPI-connected transceivers, manages lighting PWM, and wakes from RTCC to service periodic tasks without draining the battery. Three on-chip comparators handle current sensing for short-circuit protection. Designers place the device between a 12V-to-3.3V LDO and the load drivers, using peripheral pin-select to route UART, I2C, and PWM to available GPIO without PCB rework.
Recommended
Low-Cost TFT HMI / Graphics
The PIC32MX154F128B-V/MM is well suited for small TFT HMI panels because it integrates a Parallel Master Port (PMP) that drives 8/16-bit TFT-LCDs directly, plus 32 KB SRAM for double-buffered graphics frames. At 72 MHz the M4K core can refresh 320x240 QVGA panels at 30 fps with simple UI assets. Peripheral pin-select lets designers remap the PMP data lines to avoid routing conflicts, while the 10-bit ADC drives touch-screen resistive sensing through the CTMU for pressure measurement. The 28-QFN package keeps the HMI board compact for hand-held appliance or industrial panel designs.
Recommended
USB HID Peripherals
The PIC32MX154F128B-V/MM integrates a USB 2.0 full-speed device/host/OTG transceiver that eliminates external PHY cost for HID-class peripherals such as keyboards, mice, game controllers, and custom data loggers. The 128 KB Flash stores USB descriptors, HID report tables, and application code, while 32 KB SRAM holds HID buffers and ring buffers for COM-port emulation. The CTMU provides capacitive touch sensing for multi-touch trackpads, and the XLP sleep modes let battery-powered HID devices achieve months of standby life. Place a 0.1 uF ceramic near VUSB and route D+/D- as a 90-ohm differential pair for USB compliance.
Recommended
Audio Playback / Consumer Audio
The PIC32MX154F128B-V/MM handles low-cost audio playback using its 32 KB SRAM as a sample buffer for I2S-driven DACs and its DMA engine for low-CPU-overhead sample transfer. PWM channels can synthesize mono audio directly to a class-D amplifier for low-power buzzers or simple beeps. The 128 KB Flash stores audio assets such as voice prompts or sound effects up to 16 seconds at 8 kHz ADPCM. The AEC-Q100 grade suits in-vehicle chimes and e-call audio. Connect an MCP4018 digital potentiometer for volume control and pair with a TPA2006 class-D amplifier for output.
Recommended
Capacitive Touch Sensing HMI
The PIC32MX154F128B-V/MM uses its on-chip CTMU to implement capacitive touch sensing on up to 13 channels with sub-pF resolution, enabling slider, wheel, and button replacements for sealed HMI front panels. Combined with the 10-bit ADC and a small TFT via PMP, designers can build low-cost touch appliances such as induction cooktops, washing machines, or thermostats. The XLP sleep mode keeps the touch sense active at under 1 uA between user interactions. Engineers must calibrate each sensor's charge time baseline at production test and add a guard ring around each touch pad for moisture immunity.
Recommended
IoT Sensor Hubs and Data Loggers
The PIC32MX154F128B-V/MM serves as an IoT sensor hub by combining USB device connectivity for PC-based logging, I2C/SPI for sensor aggregation, and 128 KB Flash for local buffering of up to 8,000 sample timestamps. The RTCC allows accurate timestamping without main CPU intervention, while XLP deep-sleep keeps battery drain below 1 uA between measurements. AEC-Q100 grade allows deployment in automotive telematics units or outdoor industrial sensor pods. Pair with an MCP9808 temperature sensor, an MCP3421 18-bit ADC, and a 4G/NB-IoT module over UART for a complete remote-monitoring platform.
Recommended
Battery-Powered Wearable Devices
The PIC32MX154F128B-V/MM supports wearable fitness bands and health monitors by combining XLP sleep currents under 1 uA with USB charging interface and CTMU capacitive touch for button-less user input. The 32 KB SRAM holds sensor sample buffers while the 128 KB Flash stores BLE-stack-lite, USB-CDC, and application code. At 72 MHz the core can execute DSP-style heart-rate algorithms while still leaving peripheral bandwidth free for accelerometer I2C polling. The 6x6 mm QFN package fits inside wristbands and the AEC-Q100 grade ensures reliability across body-temperature variations and automotive applications.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX154F128B-V/MM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX154F128B-I/MM | PIC32MX174F256B-V/MM | PIC32MX150F128B-V/MM |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN-S (6x6) | 28-QFN-S (6x6) - same | 28-QFN-S (6x6) - same | 28-QFN-S (6x6) - same |
| Program Flash | 128 KB | 128 KB | 256 KB | 128 KB |
| SRAM | 32 KB | 32 KB | 64 KB | 32 KB |
| Maximum Frequency | 72 MHz | 72 MHz | 72 MHz | 72 MHz |
| AEC-Q100 Grade | Yes | No | Yes | Yes |
| Operating Temperature | -40C to +105C | -40C to +85C | -40C to +105C | -40C to +105C |
| CTMU / USB | CTMU + USB FS OTG | CTMU + USB FS OTG | CTMU + USB FS OTG | No CTMU + USB FS OTG |
| Deep-Sleep Current (RTCC) | <1 uA | <1 uA | <1 uA | ~3 uA |
Key Differentiators
- AEC-Q100 qualification with -40C to +105C operating range (vs PIC32MX154F128B-I/MM)
- 256 KB Flash upgrade path in identical footprint (vs PIC32MX174F256B-V/MM)
- CTMU + USB FS OTG + 32 KB SRAM integration (vs PIC32MX150F128B-V/MM)
Design Notes
The 28-QFN-S package exposes a large thermal pad (pin 29) that MUST be soldered to a continuous ground pour of at least 1 square inch of 2-oz copper to meet the -40C to +105C operating range. Estimated: with theta_JA around 35 C/W on a 4-layer JEDEC test board, the device can dissipate roughly 1.4W before reaching the +105C upper limit at +85C ambient. For automotive under-hood deployments add a topside copper pour connected by thermal vias to the EP pad.
Route the 48 MHz primary oscillator traces as short as possible (under 5 mm) with symmetric length matching and a grounded guard ring. Keep the crystal within 5 mm of OSCI/OSCO pins, and place load capacitors (typically 15-33 pF) within 2 mm of the crystal. Add a 0.1 uF ceramic plus 10 uF bulk decoupling capacitor within 5 mm of every VDD pin and route AVDD/AVSS with separate analog ground returns to avoid digital switching noise coupling into ADC references.
Do not skip the 0.1 uF decoupling on VUSB; USB suspend current compliance fails without proper rail decoupling. Ensure USB D+/D- are routed as a 90-ohm differential pair with continuous ground reference; stubs longer than 4 mm can cause signal-integrity failures at full-speed edges. When using peripheral pin-select, configure the PPS lock before the first peripheral enable or registers will appear latched at default mappings on the first instruction cycle after reset.
For lowest XLP deep-sleep current, disable all unused peripherals via the peripheral clock gating registers, switch unused GPIO to analog mode (TRIS=1, ODCE=1, ANSEL=1), and avoid floating digital inputs that draw ~1 uA each through input buffer leakage. The CTMU and RTCC together can keep an application under 1 uA average draw when used with proper PPS gating. Reference: Microchip AN1894 PIC32MX XLP design tips.
Compliance Information
AEC-Q100 qualified per V suffix automotive grade. RoHS and lead-free compliant per Microchip product page. Halogen-free status not specified in retrieved data.
