Texas Instruments MSP430F423AIPM

Overview

MSP430F423AIPM 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, integrated 128-segment LCD driver, 8KB Flash + 256B RAM, and operation from 1.8 V to 3.6 V. It targets high-precision portable metering applications including handheld energy meters and weigh scales.

For engineers reviewing the MSP430F423AIPM datasheet, MSP430F423AIPM pinout, MSP430F423AIPM application, or MSP430F423AIPM equivalent, key selection criteria include sigma-delta ADC resolution and gain programmability, LCD segment count, low-power mode wake-up time (<6 μs), Flash memory size, and QFP-64 package compatibility with space-constrained metering PCBs.

Technical Context

The MSP430F423AIPM integrates a 16-bit RISC CPU with constant generators and a digitally controlled oscillator (DCO) enabling sub-6-μs wake-up from LPM4. Its FLL+ module locks DCO frequency to a 32.768-kHz crystal reference, generating stable MCLK, SMCLK, and ACLK signals for synchronized peripheral operation.

All three SD16 ADC channels support fully differential analog inputs with programmable gain (1× to 16×), internal voltage reference, and temperature sensor integration. The LCD controller supports static, 2-/3-/4-MUX configurations with dedicated segment/common drive outputs and built-in resistive divider bias generation.

Key Specifications

Pinout & Package

Package: 64-pin plastic quad flat pack (QFP), surface-mount, 10 mm × 10 mm body, 0.5 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F423AIPM, the MSP430F425AIPM and MSP430F427AIPM offer scalable Flash/RAM while preserving identical analog performance, LCD drive, and low-power behavior-making them drop-in upgrades for design evolution without layout changes.

Availability

MSP430F423AIPM is available at Aetrix Electronics and suitable for handheld energy meters, industrial weigh scales, smart water meters, and portable gas detectors requiring stable component supply across long-lifecycle industrial programs.

Supply support for MSP430F423AIPM 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 over 50 years of innovation in low-power microcontrollers.

The MSP430F423AIPM belongs to the MSP430x4xx family, designed specifically for ultra-low-power mixed-signal applications in portable instrumentation, utility metering, and industrial sensing where precision analog integration and multi-year battery life are critical.

FAQ

What is the maximum resolution achievable with the SD16 ADCs on the MSP430F423AIPM?

The MSP430F423AIPM features three independent 16-bit sigma-delta ADCs. Each channel delivers true 16-bit resolution with differential input pairs and programmable gain amplifier stages. Oversampling can extend effective resolution beyond 16 bits for DC or low-frequency signals, as confirmed in the SLAS587 datasheet section on SD16 performance characteristics. The MSP430F423AIPM does not support higher native resolution modes.

Does the MSP430F423AIPM support in-system programming without external hardware?

Yes, the MSP430F423AIPM includes a factory-programmed bootstrap loader (BSL) that enables in-system programming via UART using only P1.0 (TX) and P1.1 (RX) pins. No external JTAG emulator or programming voltage is required. The BSL is protected by a user-configurable password, and its operation is fully documented in TI application report SLAA089. This capability is integral to the MSP430F423AIPM design.

How many LCD segments can the MSP430F423AIPM drive, and what multiplexing options are supported?

The MSP430F423AIPM integrates a hardware LCD controller capable of driving up to 128 segments using 4 common outputs (COM0–COM3). It supports static, 2-MUX, 3-MUX, and 4-MUX LCD configurations with automatic waveform generation and built-in resistive divider for bias voltage generation. This capability is explicitly specified in the SLAS587 datasheet functional description and terminal function table for pins S0–S31 and COM0–COM3.

What is the wake-up time from the lowest power mode on the MSP430F423AIPM?

The MSP430F423AIPM wakes up from Low-Power Mode 4 (LPM4)-its deepest retention mode drawing only 0.1 μA-in less than 6 microseconds. This specification is measured from interrupt assertion to first CPU instruction execution and is guaranteed across the full operating temperature range (–40°C to +85°C), as stated in the SLAS587 datasheet electrical characteristics table.

Is the MSP430F423AIPM pin-compatible with other devices in the MSP430F42xA family?

Yes, the MSP430F423AIPM is pin-compatible with the MSP430F425AIPM and MSP430F427AIPM in the same 64-pin QFP (PM) package. All share identical pin assignments, peripheral mappings, and electrical characteristics. This allows direct PCB reuse when upgrading Flash/RAM capacity, as confirmed in the SLAS587 "Available Options" and "Terminal Functions" sections.