Texas Instruments MSP430AFE253IPWR

Overview

MSP430AFE253IPWR from Texas Instruments is an ultra-low-power mixed-signal microcontroller integrating three independent 24-bit sigma-delta ADCs, a 16-bit RISC CPU, 16 KB flash, 512 B RAM, and USART with UART/SPI support. 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 built-in voltage reference buffering.

For engineers reviewing the MSP430AFE253IPWR datasheet, MSP430AFE253IPWR pinout, MSP430AFE253IPWR application, or MSP430AFE253IPWR equivalent, key selection criteria include verified 24-bit ADC performance at 2.5–3.6 V analog supply, TSSOP-24 package compatibility, LPM4 current of 0.1 µA, and SD24_A channel count confirmed for A0/A1/A2 inputs.

Technical Context

The MSP430AFE253IPWR implements a 16-bit RISC architecture with digitally controlled oscillator (DCO) enabling sub-1 µs wake-up from standby mode. Its SD24_A module provides three independent 24-bit sigma-delta converters with differential PGA inputs, programmable gain, and internal/external reference support - all operating within a shared 2.5–3.6 V AVCC range.

Core timing is managed by a flexible clock system supporting HF crystal (up to 16 MHz), DCO (calibrated up to 12 MHz), and VLO (12 kHz). Power management includes five low-power modes, brownout detection, and supply voltage supervisor with programmable level detection - all coordinated via dedicated control registers and interrupt vectors.

Key Specifications

Pinout & Package

Package: 24-pin TSSOP (PW), 7.8 mm × 4.4 mm body size, JEDEC standard footprint with exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430AFE252IPWR and MSP430AFE233IPWR, the MSP430AFE253IPWR uniquely combines full 16 KB flash, 512 B RAM, and three independent 24-bit SD24_A converters in the same 24-TSSOP package - making it the highest-capability variant for next-generation Class 0.2 meters requiring local computation and extended feature sets.

Availability

MSP430AFE253IPWR is available at Aetrix Electronics and suitable for single-phase electricity metering, digital power monitoring, and sensor signal conditioning requiring stable component supply across multi-year production cycles.

Supply support for MSP430AFE253IPWR 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 90 years of innovation in industrial and energy infrastructure solutions.

The MSP430AFE2xx product line is designed specifically for high-accuracy metrology applications - integrating precision sigma-delta ADCs, ultra-low-power operation, and robust analog front-end features to meet IEC 62053 and ANSI C12 standards.

FAQ

What is the maximum system clock frequency supported by the MSP430AFE253IPWR?

The MSP430AFE253IPWR supports a maximum system clock (MCLK) frequency of 12 MHz when powered at ≥3.3 V. This is achieved using the calibrated DCO or an external HF crystal up to 16 MHz - with appropriate divider configuration to keep CPU execution within specification. At 1.8 V, the maximum supported frequency is 4.15 MHz. All timing-critical peripherals including SD24_A, Timer_A3, and USART0 operate synchronously to this clock domain.

Does the MSP430AFE253IPWR include an internal voltage reference for its ADCs?

Yes, the MSP430AFE253IPWR includes an internal 1.2 V voltage reference with buffered output accessible via the VREF pin. This reference is used by default for the SD24_A converters and can be enabled or disabled in software. It exhibits ±1% initial accuracy and low temperature drift, enabling stable 24-bit ADC performance without external reference components - critical for Class 0.2 electricity meter certification.

How many analog input channels does the MSP430AFE253IPWR support for simultaneous sampling?

The MSP430AFE253IPWR supports three independent analog input channels via its SD24_A module: A0.0+/A0.0-, A1.0+/A1.0-, and A2.0+/A2.0-. Each channel has dedicated differential inputs, programmable gain amplifier, and configurable oversampling ratio - allowing true simultaneous sampling across all three channels without time-division multiplexing. This is confirmed in the device comparison table and functional block diagram for MSP430AFE2x3 variants.

What low-power modes are available on the MSP430AFE253IPWR and what is the lowest current consumption?

The MSP430AFE253IPWR offers five low-power modes (LPM0–LPM4). The lowest power state is LPM4 (RAM retention off mode), drawing 0.1 µA typical at 2.2 V and 25°C - verified in Section 5.7 of the SLAS701B datasheet. In this mode, the DCO, SMCLK, and ACLK are disabled, only the RAM and registers retain state, and wake-up is possible via RST/NMI or port interrupts. This enables multi-year battery operation in metering applications.

Is the MSP430AFE253IPWR pin-compatible with other devices in the MSP430AFE2xx family?

Yes, the MSP430AFE253IPWR is pin-compatible with all 24-TSSOP variants in the MSP430AFE2xx family, including MSP430AFE252IPWR and MSP430AFE233IPWR. They share identical pinouts, power domains (AVCC/AVSS/DVCC/DVSS), and peripheral mappings. Differences lie in internal resources: MSP430AFE253IPWR provides three SD24_A converters and 16 KB flash, while MSP430AFE252IPWR omits A2.0+/A2.0- signals and MSP430AFE233IPWR reduces flash to 8 KB - all without requiring PCB redesign.