Texas Instruments MSP430F5257IZQE

Overview

MSP430F5257IZQE from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller designed as an "always-on" system controller for portable and battery-powered applications. It features 128 KB flash, 16 KB RAM, dual-supply operation (DVCC: 1.8–3.6 V; DVIO: 1.62–1.98 V), 35 general-purpose I/Os with up to 16 external interrupts, and four USCI_A + four USCI_B modules supporting UART, IrDA, SPI, and I²C. It targets sensor hub and power-management roles in handsets, tablets, and data loggers.

For engineers reviewing the MSP430F5257IZQE datasheet, MSP430F5257IZQE pinout, MSP430F5257IZQE application, or MSP430F5257IZQE equivalent, key selection criteria include split-rail I/O voltage support (1.8 V DVIO), LPM3 standby current of 2.3 µA at 3.0 V, 3.5 µs wake-up time, integrated RTC with alarm, and hardware multiplier for real-time sensor fusion algorithms.

Technical Context

The MSP430F5257IZQE implements a unified clock system with FLL stabilization, dual crystal support (XT1 for 32-kHz RTC, XT2 up to 32 MHz), and three internal sources (VLO, REFO, DCO). Its power architecture integrates a programmable LDO core regulator, supply voltage supervision (SVS/SVM), and brownout reset - enabling robust operation across variable battery conditions.

All peripherals-including four 16-bit timers (TA0/TA1/TA2/TB0), 10-bit ADC10_A with 12 channels (10 external + 2 internal), comparator_B, and 3-channel DMA-are synchronized to the flexible clock domains (MCLK, SMCLK, ACLK) and fully accessible under both DVCC and DVIO supply rails, supporting heterogeneous peripheral interfacing without level shifters.

Key Specifications

Pinout & Package

Package: MicroStar Junior™ BGA (80-pin, 5 mm × 5 mm, ZQE). Ball pitch: 0.5 mm. Thermal pad exposed on underside. Compliant with JEDEC MO-220 standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F5257IZQE, the MSP430F5259IZQE offers double RAM for larger firmware or data buffers without changing layout, while the MSP430F5257IRGC provides identical functionality in a larger, rework-friendly VQFN package - enabling design flexibility across volume, thermal, and manufacturing requirements.

Availability

MSP430F5257IZQE is available at Aetrix Electronics and suitable for wearable sensor hubs, smartphone power managers, and industrial data loggers requiring stable component supply and long-term lifecycle support.

Supply support for MSP430F5257IZQE 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 company headquartered in Dallas, Texas, delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The MSP430F525x product line was engineered specifically for "always-on" ultra-low-power system control - emphasizing split-rail I/O, sub-µA standby, fast wake-up, and integrated sensor interface peripherals to replace discrete power management and sensor aggregation ICs.

FAQ

What is the maximum operating frequency of the MSP430F5257IZQE?

The MSP430F5257IZQE supports a system clock (MCLK) up to 25 MHz, enabled by its integrated FLL with XT2 crystal support up to 32 MHz. This frequency is achievable with proper configuration of the FLL loop, supply voltage ≥2.2 V, and stable crystal or external clock source - allowing real-time processing of sensor data streams without compromising ultra-low-power operation.

Does the MSP430F5257IZQE support in-system programming without external voltage?

Yes, the MSP430F5257IZQE supports serial onboard programming (SBW) with no external programming voltage required. Its integrated bootloader (BSL) accepts firmware updates via UART or SPI using only DVCC and DVIO supplies - simplifying field upgrades and eliminating need for dedicated HV programming hardware during production or maintenance.

How many analog input channels does the ADC10_A module support on the MSP430F5257IZQE?

The ADC10_A module on the MSP430F5257IZQE supports 12 total input channels: 10 external analog inputs (A0–A7, VeREF+, VeREF−) and 2 internal references (temperature sensor and supply voltage). Channel selection is controlled via ADC10INCHx bits, and conversion results are stored in ADC10MEM with configurable sample-and-hold timing.

Can the MSP430F5257IZQE operate with only the DVIO supply active?

No - the MSP430F5257IZQE requires both DVCC (1.8–3.6 V) and DVIO (1.62–1.98 V) supplies to function. DVCC powers the core, flash, RAM, and DVCC-domain peripherals (ADC, comparator, P5/P6/PJ), while DVIO powers DVIO-domain I/O (P1–P4, P7). Omitting either supply violates absolute maximum ratings and prevents operation.

What is the purpose of the RSTDVCC pin on the MSP430F5257IZQE?

The RSTDVCC pin on the MSP430F5257IZQE is a DVCC-domain reset input that asserts a system reset when pulled low. It is Schmitt-triggered for noise immunity and functions independently of the internal SVS reset - providing a reliable hardware reset path for external supervisory circuits or manual reset buttons tied to the DVCC rail.