Texas Instruments MSP430F425AIPM

Overview

MSP430F425AIPM from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring three independent 16-bit sigma-delta ADCs with differential PGA inputs, 16KB+256B flash/512B RAM, integrated 128-segment LCD driver, and FLL+ clock system. It operates from 1.8 V to 3.6 V, draws 400 μA at 1 MHz in active mode, and supports wake-up from standby in <6 μs - optimized for battery-powered metering applications including energy meters and handheld weighing scales.

For engineers reviewing the MSP430F425AIPM datasheet, MSP430F425AIPM pinout, MSP430F425AIPM application, or MSP430F425AIPM equivalent, key selection criteria include its triple SD16 ADC architecture with programmable gain, on-chip LCD drive capability up to 4-MUX, UART/SPI serial interface, and five low-power operating modes enabling sub-μA system-level power management.

Technical Context

The MSP430F425AIPM implements a 16-bit RISC CPU with constant generators and seven addressing modes, delivering one-cycle register-to-register execution. Its FLL+ module locks the DCO to multiples of a 32.768-kHz watch crystal, generating stable MCLK, SMCLK, and ACLK signals with programmable division.

Three independent SD16 modules each provide fully differential analog inputs, internal temperature sensor, and built-in voltage reference - supporting simultaneous high-resolution measurements without external signal conditioning. The integrated LCD controller drives up to 128 segments across static, 2-/3-/4-MUX configurations using dedicated segment/common outputs and internal resistive divider circuitry.

Key Specifications

Pinout & Package

Package: 64-pin plastic quad flat pack (QFP), surface-mount, -40°C to +85°C operating range.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F423AIPM and MSP430F427AIPM, the MSP430F425AIPM delivers optimal balance of memory resources and peripheral integration for mid-tier metering applications - offering sufficient flash for certified metrology algorithms and adequate RAM for dual-buffered ADC acquisition without over-provisioning cost or power.

Availability

MSP430F425AIPM is available at Aetrix Electronics and suitable for energy metering, portable weighing equipment, and water/gas flow instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial OEM programs.

Supply support for MSP430F425AIPM 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 metrology-grade signal chains.

The MSP430F42xA family was engineered specifically for high-precision, battery-operated measurement systems - integrating sigma-delta ADCs, LCD drivers, and ultra-low-power timers to minimize external components in utility and industrial instrumentation.

FAQ

What is the maximum operating frequency of the MSP430F425AIPM?

The MSP430F425AIPM features a digitally controlled oscillator (DCO) stabilized by the FLL+ module, supporting a maximum MCLK frequency of 8 MHz. This allows instruction execution at 8 million cycles per second with 125-ns instruction cycle time, sufficient for real-time metrology calculations while maintaining ultra-low power consumption in active mode.

Does the MSP430F425AIPM support hardware UART communication?

Yes, the MSP430F425AIPM includes USART0, which can be configured in asynchronous UART mode using P2.4/UTXD0 and P2.5/URXD0 pins. It supports standard baud rates up to 115.2 kbps and includes double-buffered transmit and receive registers - enabling robust communication for IEC 62056-21 (DLMS) metering protocols without CPU polling overhead.

How many analog input channels does the MSP430F425AIPM support for ADC conversion?

The MSP430F425AIPM integrates three independent 16-bit sigma-delta ADC modules (SD16), each with a fully differential analog input pair (e.g., A0.0+/A0.0−). This provides six physical analog input terminals supporting up to three simultaneous differential measurements - ideal for voltage, current, and auxiliary sensor acquisition in energy meters.

What LCD configuration options are supported by the MSP430F425AIPM?

The MSP430F425AIPM's integrated LCD controller supports static, 2-MUX, 3-MUX, and 4-MUX segment drive configurations. With 36 segment outputs (S0–S35) and 4 common outputs (COM0–COM3), it drives up to 144 segments (36 × 4) - exceeding the specified 128-segment capability and accommodating custom display layouts in utility meter front panels.

Is the MSP430F425AIPM pin-compatible with other devices in the MSP430F42xA family?

Yes, the MSP430F425AIPM shares identical 64-pin QFP packaging and pinout with MSP430F423AIPM and MSP430F427AIPM. All three devices use the same PM package designation and terminal functions - enabling hardware design reuse across product tiers by simply changing flash/RAM capacity during firmware programming and qualification.