Texas Instruments MSP430F425IPM

Overview

MSP430F425IPM from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring three independent 16-bit sigma-delta ADCs with differential PGA inputs, 16 KB + 256 B flash memory, 512 B RAM, integrated 128-segment LCD driver, and UART/SPI serial interface - deployed in handheld energy meters and precision weigh scales requiring long battery life and high-resolution analog measurement.

For engineers reviewing the MSP430F425IPM datasheet, MSP430F425IPM pinout, MSP430F425IPM application, or MSP430F425IPM equivalent, key selection criteria include ultra-low active/standby current (400 µA @ 1 MHz / 1.6 µA), 64-pin LQFP package with LCD segment outputs, FLL+ clock system, and SD16 ADC performance at 16-bit resolution with internal reference.

Technical Context

The MSP430F425IPM implements a 16-bit RISC CPU with constant generators and hardware multiplier, enabling high code efficiency in battery-constrained applications. Its five low-power modes-including LPM4 (0.1 µA) with RAM retention-are optimized for rapid wake-up (<6 µs from standby) and extended runtime in portable metering systems.

It integrates three independent SD16 sigma-delta ADC modules, each with programmable gain amplifier, differential inputs, and internal temperature sensor/voltage reference. The on-chip LCD controller drives up to 128 segments using four COM lines and supports static-to-1/4-duty-cycle configurations without external bias circuitry.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (PM), 10 mm × 10 mm body size, 0.5 mm pitch, thermally enhanced for industrial ambient operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power mixed-signal microcontroller applications.

Compared with MSP430F425IPM, the MSP430F427IPM offers scalable firmware capacity without changing PCB layout or peripheral integration, while the MSP430F423IPM provides a pin-compatible path to lower-cost variants where feature set remains unchanged but memory demand is reduced.

Availability

MSP430F425IPM is available at Aetrix Electronics and suitable for handheld energy meters, precision weigh scales, and portable gas flow meters requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial OEM programs.

Supply support for MSP430F425IPM includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in ultra-low-power design and industrial-grade reliability.

The MSP430F425IPM belongs to the MSP430F42x family - engineered specifically for high-accuracy, battery-operated measurement applications including utility metering, industrial instrumentation, and portable medical devices.

FAQ

What is the maximum operating frequency of the MSP430F425IPM?

The MSP430F425IPM supports a maximum system clock (MCLK) frequency of 8 MHz at VCC = 3.6 V, as specified in the Recommended Operating Conditions table. This is achieved using the FLL+ module with DCO calibration against an external crystal or internal reference. At lower supply voltages (e.g., 1.8 V), the maximum frequency reduces to 4.15 MHz to maintain timing integrity and power stability. The MSP430F425IPM's 16-bit RISC core executes instructions in 125 ns at 8 MHz, enabling responsive real-time control in metrology applications.

Does the MSP430F425IPM support external crystal oscillators?

Yes, the MSP430F425IPM supports external crystals via the XIN/XOUT pins. It accommodates both low-frequency watch crystals (32.768 kHz) for ACLK and high-frequency crystals (1–8 MHz) or ceramic resonators (450 kHz–8 MHz) for the LFXT1 oscillator used by the FLL+. The device also includes internal digitally controlled oscillator (DCO) circuitry, allowing operation without external crystals in cost-sensitive or space-constrained designs - though crystal-based clocks provide superior frequency accuracy and stability for metrology-grade timing.

How many LCD segments can the MSP430F425IPM drive directly?

The MSP430F425IPM integrates a dedicated LCD controller capable of driving up to 128 segments using four common (COM0–COM3) and 32 segment (S0–S31) output pins. This supports static, 1/2, 1/3, and 1/4 multiplexing configurations without external bias circuitry or segment drivers. The MSP430F425IPM's LCD module includes programmable contrast control, charge pump options, and software-selectable frame frequency - making it suitable for custom alphanumeric displays in handheld meters and instrumentation panels.

What ADC resolution and architecture does the MSP430F425IPM use?

The MSP430F425IPM features three independent 16-bit sigma-delta (SD16) analog-to-digital converters, each with differential programmable-gain amplifier (PGA) inputs. Each SD16 channel supports selectable oversampling ratios (up to 256×), internal temperature sensor, internal 1.2-V reference, and external reference input. The MSP430F425IPM's SD16 modules deliver true 16-bit effective resolution at 10–20 samples per second per channel under typical conditions - meeting precision requirements for Class 0.5 energy meters and high-accuracy weigh scale front-ends.

Is the MSP430F425IPM pin-compatible with other MSP430F42x devices?

Yes, the MSP430F425IPM is fully pin-compatible with the MSP430F423IPM and MSP430F427IPM in the same 64-pin LQFP (PM) package. All three share identical pin functions, electrical characteristics, and peripheral mappings - differing only in flash memory (8 KB / 16 KB / 32 KB) and RAM (256 B / 512 B / 1 KB) sizes. This allows hardware reuse across product tiers, enabling scalable firmware development and simplified inventory management for metering platforms requiring varying feature sets.