Texas Instruments MSP430G2553IRHB32T

Overview

MSP430G2553IRHB32T from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 16 KB flash, 512 B RAM, a 10-bit 200-ksps ADC with internal reference and autoscan, two 16-bit Timer_A modules with three capture/compare registers each, USCI_A0 (UART/LIN/IrDA/SPI) and USCI_B0 (SPI/I²C), and up to 24 capacitive-touch-enabled I/O pins - deployed in battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430G2553IRHB32T datasheet, MSP430G2553IRHB32T pinout, MSP430G2553IRHB32T application, or MSP430G2553IRHB32T equivalent, key selection criteria include its 32-pin QFN package, integrated ADC10 channel count, Spy-Bi-Wire debug interface, ultra-low standby current (0.5 µA), and compatibility with TI's MSP430x2xx Family User's Guide (SLAU144).

Technical Context

The MSP430G2553IRHB32T implements a digitally controlled oscillator (DCO) calibrated for 1–16 MHz operation, enabling sub-1 µs wake-up from LPM4. Its clock system supports ACLK (32 kHz crystal or internal LF oscillator), MCLK (CPU), and SMCLK (peripherals), with independent gating per module to minimize active power.

It integrates a comparator_A+ with eight selectable inputs for analog signal conditioning or slope ADC conversion, and features programmable pullup/pulldown resistors on all I/O ports (P1–P3), with port P3 available only on 28- and 32-pin packages - confirmed for this RHB32 variant.

Key Specifications

Pinout & Package

Package: 32-pin QFN (RHB), 5 mm × 5 mm, 0.5 mm pitch, exposed thermal pad (recommended connection to DVSS). Pin count and I/O mapping match Table 2 of SLAS735J Rev. J for RHB32 configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2453IRHB32, the MSP430G2553IRHB32T adds essential ADC10 capability for analog sensing; versus MSP430FR2476TRHBR, it offers proven ultra-low-power operation in a smaller QFN footprint but lacks FRAM endurance and modern development toolchain support.

Availability

MSP430G2553IRHB32T 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 lifecycle assurance, and TI-qualified production lots.

Supply support for MSP430G2553IRHB32T 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 expertise in ultra-low-power design and industrial-grade reliability.

The MSP430G2xx family was engineered specifically for battery-operated measurement and sensing applications, emphasizing nanowatt power management, integrated analog peripherals, and minimal external component count.

FAQ

What is the maximum operating frequency of the MSP430G2553IRHB32T?

The MSP430G2553IRHB32T supports a maximum CPU clock frequency of 16 MHz via its digitally controlled oscillator (DCO), with factory-calibrated settings stored in information memory segment A. This allows deterministic real-time performance while maintaining ultra-low active current (230 µA @ 1 MHz, 2.2 V). The DCO stabilizes in under 1 µs, enabling rapid wake-up from LPM4.

Does the MSP430G2553IRHB32T include a hardware ADC?

Yes, the MSP430G2553IRHB32T integrates a 10-bit successive-approximation ADC (ADC10) capable of 200 ksps sampling with internal 1.5 V/2.5 V references, sample-and-hold, and autoscan across eight analog inputs (A0–A7). This ADC is exclusive to the G2x53 series - absent in G2x13 variants - and is fully documented in Section 4 of SLAS735J.

How many I/O pins support capacitive touch sensing on the MSP430G2553IRHB32T?

The MSP430G2553IRHB32T supports capacitive touch sensing on up to 24 I/O pins - all pins of Ports P1, P2, and P3 - using its built-in pin-oscillator circuitry. No external RC components are required; touch detection is implemented via software libraries such as TI's CapTIvate™, leveraging the device's low-power timers and comparator for charge-transfer measurement.

What debug interface does the MSP430G2553IRHB32T use?

The MSP430G2553IRHB32T uses the Spy-Bi-Wire (SBW) interface, a two-wire variant of JTAG that requires only RST/NMI/SBWTDIO and TEST/SBWTCK pins. This interface supports full-speed debugging, flash programming, and real-time trace via TI's MSP-FET and Code Composer Studio - eliminating the need for a four-wire JTAG header and reducing PCB layout complexity.

Is the MSP430G2553IRHB32T pin-compatible with other MSP430G2xx devices in the RHB32 package?

Yes, the MSP430G2553IRHB32T shares identical pinout, electrical characteristics, and package dimensions with other RHB32-packaged MSP430G2xx devices (e.g., MSP430G2453IRHB32, MSP430G2353IRHB32), as confirmed by TI's SLAS735J pinout diagrams and Table 1. However, functional differences (e.g., ADC presence, flash size) require firmware validation during substitution.