Texas Instruments MSP430G2253IRHB32T

Overview

MSP430G2253IRHB32T from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 2 kB flash, 256 B RAM, a 10-bit 200-ksps ADC with internal reference and autoscan, two 16-bit Timer_A modules (each with three capture/compare registers), USCI_A0 (UART/LIN/IrDA/SPI) and USCI_B0 (SPI/I²C), and up to 24 capacitive-touch-enabled I/O pins. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and portable instrumentation.

For engineers reviewing the MSP430G2253IRHB32T datasheet, MSP430G2253IRHB32T pinout, MSP430G2253IRHB32T application, or MSP430G2253IRHB32T equivalent, key selection criteria include its QFN-32 package, integrated ADC10 with 8-channel analog input capability, Spy-Bi-Wire debug interface, five low-power modes (including 0.1 µA off-mode with RAM retention), and verified compatibility with TI's MSP430x2xx Family User's Guide (SLAU144).

Technical Context

The MSP430G2253IRHB32T implements a 16-bit RISC CPU with 62.5-ns instruction cycle time, constant generators for code efficiency, and a digitally controlled oscillator (DCO) enabling wake-up from standby in under 1 µs. Its clock system supports ACLK (32-kHz crystal or internal LF oscillator), MCLK (system clock), and SMCLK (peripheral clock), with calibration data stored in information memory segment A.

Peripheral integration includes a comparator with eight input channels (COMP_A+), brownout detection, on-chip BSL for UART-based flash programming, and emulated JTAG via Spy-Bi-Wire. The device supports interrupt-driven operation across all peripherals, with dedicated vector addresses for ADC10, USCI_A0/B0, Timer_A0/A1, and port interrupts (P1/P2 only - P3 is not available on this variant per functional block diagram alignment).

Key Specifications

Pinout & Package

Package: 32-pin QFN (RHB), 5 mm × 5 mm, 0.5 mm pitch, exposed thermal pad (recommended connection to DVSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2253IRHB32T, the G2453 offers double flash/RAM for complex firmware while maintaining identical low-power behavior and pin compatibility; the G2233 removes ADC10 to reduce cost and silicon area, making it optimal for purely digital control tasks where analog inputs are absent.

Availability

MSP430G2253IRHB32T is available at Aetrix Electronics and suitable for smart sensor nodes, portable medical monitors, industrial control panels, and energy harvesting IoT endpoints requiring stable component supply, long-term manufacturability, and consistent parametric performance.

Supply support for MSP430G2253IRHB32T 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 and embedded processing solutions with emphasis on power efficiency, reliability, and broad ecosystem support.

The MSP430G2xx family is designed for ultra-low-power embedded applications including battery-operated sensors, portable instrumentation, and energy-constrained control systems - with the MSP430G2253IRHB32T optimized for cost-sensitive, analog-intensive edge nodes.

FAQ

What is the maximum operating frequency of the MSP430G2253IRHB32T?

The MSP430G2253IRHB32T supports a maximum MCLK frequency of 16 MHz, achieved via its digitally controlled oscillator (DCO) with factory-calibrated settings stored in information memory segment A. This allows deterministic real-time execution without external high-frequency crystals, while maintaining ultra-low-power operation across all clock domains (ACLK, SMCLK, MCLK).

Does the MSP430G2253IRHB32T include a hardware ADC?

Yes, the MSP430G2253IRHB32T integrates a 10-bit successive-approximation ADC (ADC10) with 200-ksps sampling rate, internal voltage reference (1.5 V or 2.5 V selectable), sample-and-hold, and autoscan capability across up to 8 analog input channels. This ADC is confirmed present only on MSP430G2x53 devices per Table 1 and functional block diagrams in SLAS735J.

What debug interface does the MSP430G2253IRHB32T support?

The MSP430G2253IRHB32T supports Spy-Bi-Wire (SBW) debug via two pins: RST/NMI/SBWTDIO (Pin 23) and TEST/SBWTCK (Pin 24). This 2-wire interface provides full JTAG-equivalent functionality - including flash programming, breakpoint setting, and register inspection - without requiring a 4-pin JTAG header, reducing PCB footprint and cost.

Is the MSP430G2253IRHB32T pin-compatible with other MSP430G2x53 variants in QFN-32?

Yes, the MSP430G2253IRHB32T shares identical pinout, package dimensions, and terminal functions with all other MSP430G2x53 devices in the RHB32 package (e.g., MSP430G2453IRHB32, MSP430G2353IRHB32), as confirmed by the unified "Device Pinout, MSP430G2x13 and MSP430G2x53, 32-Pin Devices, QFN" diagram and Table 2 in SLAS735J.

What low-power modes are available on the MSP430G2253IRHB32T?

The MSP430G2253IRHB32T implements six operating modes: Active Mode (AM) and five software-selectable low-power modes (LPM0–LPM4). LPM4 achieves 0.1 µA current with RAM retention and is exited in <1 µs via interrupt, enabling rapid response to external events while minimizing average system power in duty-cycled applications.