Texas Instruments MSP430AFE252IPW

Overview

MSP430AFE252IPW from Texas Instruments is an ultra-low-power mixed-signal microcontroller featuring two independent 24-bit sigma-delta ADCs, a 16-bit RISC CPU, 16 KB flash, 512 B RAM, and integrated analog front-end for precision metrology. It operates from 1.8 V to 3.6 V, achieves 220 µA active current at 1 MHz/2.2 V, and supports single-phase electricity metering with differential PGA inputs and programmable reference buffering.

For engineers reviewing the MSP430AFE252IPW datasheet, MSP430AFE252IPW pinout, MSP430AFE252IPW application, or MSP430AFE252IPW equivalent, key selection criteria include dual 24-bit SD24_A converter count, TSSOP-24 package compatibility, low-power mode timing (sub-1 µs wake-up), and integrated SVS/SVM voltage monitoring for safety-critical energy measurement systems.

Technical Context

The MSP430AFE252IPW implements a 16-bit RISC architecture with digitally controlled oscillator (DCO) enabling sub-1 µs wake-up from LPM3/LPM4, and integrates two independent SD24_A modules each supporting differential PGA inputs, internal/external reference selection, and bit-stream output via dedicated pins (SDCLK, SD0DO, SD1DO). Its clock system combines HF crystal support up to 16 MHz, internal VLO, and DCO with two factory-calibrated frequencies.

Peripherals include Timer_A3 with three capture/compare registers, USART0 configurable as UART or SPI, 16-bit hardware multiplier, brownout detector, and supply voltage supervisor/monitor with programmable threshold detection - all operating within the same 1.8–3.6 V supply range and sharing 11 I/O pins across Port P1 and P2.

Key Specifications

Pinout & Package

The MSP430AFE252IPW is housed in a 24-pin TSSOP (PW) package measuring 7.8 mm × 4.4 mm, with thermal resistance RθJA = 76.4 °C/W under still-air conditions. All NC pins must be connected to AVSS per TI recommendation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430AFE253IPW and MSP430AFE232IPW, the MSP430AFE252IPW delivers optimal balance of dual-channel metrology capability, 16 KB flash headroom for future firmware updates, and proven low-power performance - making it the preferred choice for Class 0.5 single-phase meters requiring long-term field reliability.

Availability

MSP430AFE252IPW is available at Aetrix Electronics and suitable for single-phase electricity metering, digital power monitoring, and low-power grid edge sensing requiring stable component supply and long-term industrial lifecycle support.

Supply support for MSP430AFE252IPW 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer applications.

The MSP430AFE2xx product line is designed specifically for high-accuracy, ultra-low-power energy measurement systems - integrating precision sigma-delta ADCs, metrology-grade references, and robust low-power modes into a single-chip solution.

FAQ

What is the maximum system clock frequency supported by the MSP430AFE252IPW?

The MSP430AFE252IPW supports a maximum MCLK frequency of 12 MHz when VCC ≥ 3.3 V and duty cycle is 50% ±10%. At lower supply voltages, the maximum frequency is reduced: 9 MHz at 2.7 V and 4.15 MHz at 1.8 V. This scaling ensures reliable operation across the full 1.8–3.6 V supply range while maintaining timing integrity for metrology computations in the MSP430AFE252IPW.

How many analog input channels does the MSP430AFE252IPW support?

The MSP430AFE252IPW supports two independent 24-bit sigma-delta ADC channels (SD24_A), each with differential PGA inputs - designated as A0.0+/A0.0− and A1.0+/A1.0−. Unlike the MSP430AFE253IPW, it does not include the third channel (A2.0+/A2.0−), making it optimized for dual-signal acquisition in single-phase metering applications using the MSP430AFE252IPW.

Does the MSP430AFE252IPW include an internal voltage reference?

Yes, the MSP430AFE252IPW includes an internal 1.2 V reference that can be output on the VREF pin for use by the SD24_A converters. It also supports external reference input via the same VREF pin, allowing designers to select between internal stability and higher-precision external references depending on accuracy requirements in their MSP430AFE252IPW implementation.

What debug interface does the MSP430AFE252IPW use?

The MSP430AFE252IPW uses the Spy-Bi-Wire (SBW) interface via pins TEST/SBWTCK (Pin 10) and RST/NMI/SBWTDIO (Pin 11), providing a two-wire JTAG-compatible protocol for programming and real-time debugging. This eliminates the need for a full 4-wire JTAG header, saving PCB space and simplifying test fixture design for production programming of the MSP430AFE252IPW.

What is the standby current consumption of the MSP430AFE252IPW?

The MSP430AFE252IPW consumes 0.5 µA in standby mode (LPM3) at 25°C and 2.2 V supply, with fVLO = 12 kHz active. This ultra-low quiescent current enables extended battery life in always-on metering applications where periodic wake-up events occur infrequently - a key specification confirmed in the official SLAS701B datasheet for the MSP430AFE252IPW.