Texas Instruments MSP430F423IPM

Overview

MSP430F423IPM from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller with three independent 16-bit sigma-delta ADCs, integrated 128-segment LCD driver, and UART/SPI serial interface. It features 8 KB flash, 256 B RAM, operates from 1.8 V to 3.6 V, and supports five power-saving modes - ideal for battery-powered handheld metering equipment.

For engineers reviewing the MSP430F423IPM datasheet, MSP430F423IPM pinout, MSP430F423IPM application, or MSP430F423IPM equivalent, key selection criteria include its 16-bit sigma-delta ADC resolution, LCD segment drive capability, standby current of 1.6 µA, wake-up time under 6 µs, and LQFP-64 package compatibility with TI's MSP430x4xx family toolchain and development ecosystem.

Technical Context

The MSP430F423IPM implements a 16-bit RISC CPU with constant generators and a digitally controlled oscillator (DCO), enabling sub-6 µs wake-up from LPM3. Its FLL+ frequency-locked loop stabilizes MCLK up to 8 MHz using LFXT1 (32.768 kHz watch crystal) or external XT1 sources.

Three independent SD16 sigma-delta ADC modules each support differential PGA inputs, programmable gain, and internal reference - configured for high-resolution analog sensing in single- or multi-channel mode. The integrated LCD controller drives up to 128 segments with static or multiplexed (1–4 mux) operation, supported by dedicated analog voltage level pins (R03–R33) and COM outputs.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (PM), 10 mm × 10 mm body size, 0.5 mm pitch. RoHS-compliant, surface-mount, thermally enhanced for industrial ambient conditions.

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 MSP430F423IPM trades flash/RAM capacity for lower unit cost and smaller code footprint - optimal for fixed-function metering. Against MSP430F249IPM, it delivers full LCD + triple-ADC integration in one die, eliminating two external ICs and associated layout complexity.

Availability

MSP430F423IPM is available at Aetrix Electronics and suitable for handheld energy meters, portable weigh scales, smart gas meters, and ultrasonic water meters requiring stable component supply and long-term industrial lifecycle support.

Supply support for MSP430F423IPM 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 leadership in ultra-low-power microcontrollers.

The MSP430F423IPM belongs to the MSP430x4xx family, designed specifically for high-precision, battery-operated measurement applications requiring integrated analog sensing, LCD display, and minimal active/standby power.

FAQ

What is the maximum operating frequency of the MSP430F423IPM?

The MSP430F423IPM supports a maximum system clock (MCLK) frequency of 8 MHz, achievable via the FLL+ module using either the internal DCO or external XT1 crystal/resonator. At 3.6 V supply, this frequency is fully characterized and guaranteed across the –40°C to 85°C operating range. The MSP430F423IPM maintains timing integrity and ADC performance up to this rate, making it suitable for real-time metrology tasks with tight sampling deadlines.

Does the MSP430F423IPM support hardware UART communication?

Yes, the MSP430F423IPM includes USART0, which can be configured in asynchronous UART mode using P2.4/UTXD0 and P2.5/URXD0 pins. This interface supports standard baud rates up to 115.2 kbps at 3.6 V and is fully compatible with TI's BSL protocol for firmware updates. The MSP430F423IPM UART implementation requires no external transceivers for 3.3 V logic-level communication with host controllers or modems.

How many LCD segments can the MSP430F423IPM drive directly?

The MSP430F423IPM integrates a dedicated LCD controller capable of driving up to 128 segments using static or multiplexed (1–4 backplane) configurations. It provides four COM outputs (COM0–COM3), 32 segment outputs (S0–S31), and four analog voltage level inputs (R03–R33) to configure bias voltages - enabling direct connection to common character or custom segment displays without external driver ICs.

What ADC resolution and architecture does the MSP430F423IPM use?

The MSP430F423IPM features three independent 16-bit sigma-delta analog-to-digital converters (SD16 modules), each with differential programmable-gain amplifier (PGA) inputs. These ADCs deliver true 16-bit effective resolution with >100 dB SNR under typical conditions and support internal references (1.2 V or 2.0 V), external references, or built-in temperature sensing - all accessible without external components.

Is the MSP430F423IPM pin-compatible with other MSP430F42x devices?

Yes, the MSP430F423IPM is fully pin-compatible with MSP430F425IPM and MSP430F427IPM in the same LQFP-64 (PM) package. All share identical pin functions, electrical characteristics, and peripheral mappings - allowing hardware design reuse across variants. Firmware porting requires only flash/RAM size adjustments; no PCB or schematic changes are needed when upgrading within the F42x family.