Texas Instruments MSP430G2112IRSA16T

Overview

MSP430G2112IRSA16T from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 1 kB flash, 128 B RAM, one 16-bit Timer_A with three capture/compare registers, Universal Serial Interface (USI) for SPI/I²C, on-chip comparator, and eight programmable I/O pins - designed for battery-powered sensor nodes and portable instrumentation.

For engineers reviewing the MSP430G2112IRSA16T datasheet, MSP430G2112IRSA16T pinout, MSP430G2112IRSA16T application, or MSP430G2112IRSA16T equivalent, key selection criteria include supply voltage range (1.8–3.6 V), standby current (0.5 µA), Spy-Bi-Wire debug interface, QFN-16 package footprint, and absence of integrated ADC10 - distinguishing it from G2x52-series variants.

Technical Context

The MSP430G2112IRSA16T implements a 16-bit CPU with seven addressing modes and 51-instruction set, paired with a basic clock system supporting DCO (calibrated up to 16 MHz), LF oscillator, and external crystal input. Its five low-power modes (LPM0–LPM4) enable sub-µA standby operation with wake-up in under 1 µs.

Peripheral integration includes USI supporting master/slave SPI and I²C protocols, Comparator_A+ with eight selectable inputs, and port-level capacitive-touch capability via PinOsc. No ADC10 module is present - confirmed by device family documentation and Table 1 pin function notes.

Key Specifications

Pinout & Package

Package: 16-pin QFN (RSA), 3 mm × 3 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 microcontroller applications.

Compared with MSP430G2212IRSA16, the MSP430G2112IRSA16T offers lower cost and smaller memory footprint for fixed-function applications; compared with MSP430G2132IRSA16, it trades ADC capability for reduced complexity and marginally lower power in purely digital control roles.

Availability

MSP430G2112IRSA16T is available at Aetrix Electronics and suitable for smart sensor nodes, portable medical devices, industrial control panels, and energy-harvesting IoT endpoints requiring stable component supply across long-lifecycle designs.

Supply support for MSP430G2112IRSA16T 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 microcontroller innovation.

The MSP430G2xx family delivers ultra-low-power mixed-signal control for battery-operated and energy-constrained systems - emphasizing rapid wake-up, intelligent peripheral autonomy, and minimal active power consumption.

FAQ

Does MSP430G2112IRSA16T include an integrated analog-to-digital converter (ADC)?

No, the MSP430G2112IRSA16T does not include the ADC10 module. This is explicitly confirmed in TI's SLAS722G datasheet: ADC10 pin functions and circuitry are exclusive to MSP430G2x52 devices. The MSP430G2112IRSA16T belongs to the G2x12 series and provides only Comparator_A+, making it suitable for threshold-based analog monitoring but not for digitizing analog signals. Designers requiring ADC functionality should consider MSP430G2132IRSA16 instead.

What is the maximum operating frequency of MSP430G2112IRSA16T?

The MSP430G2112IRSA16T supports a maximum DCO frequency of 16 MHz, as factory-calibrated in information memory segment A. This frequency is achievable across the full 1.8–3.6 V supply range and ambient temperatures per the datasheet's electrical characteristics. The device does not require an external crystal to reach this speed - the internal digitally controlled oscillator (DCO) stabilizes in less than 1 µs, enabling fast wake-up from low-power modes while maintaining timing precision.

Which debug interface does MSP430G2112IRSA16T support?

The MSP430G2112IRSA16T supports Spy-Bi-Wire (SBW), a two-wire variant of JTAG implemented on pins RST/NMI/SBWTDIO (pin 9) and TEST/SBWTCK (pin 10). This interface enables full in-system programming, real-time debugging, and flash memory erasure without requiring a four-wire JTAG header. TI's MSP-FET and LaunchPad development tools natively support SBW, and the protocol is documented in the MSP430x2xx Family User's Guide (SLAU144).

Can MSP430G2112IRSA16T drive capacitive touch buttons?

Yes, the MSP430G2112IRSA16T supports capacitive touch sensing on all P1.x pins via its integrated PinOsc (pin oscillator) module. Each P1 pin can be individually configured to generate a relaxation oscillator whose frequency shifts with finger proximity. No external components are required - the built-in comparator and timer resources handle measurement autonomously. This capability is documented in the "Digital I/O" section of SLAS722G and validated across the G2x12 family, including the MSP430G2112IRSA16T.

What package type and thermal considerations apply to MSP430G2112IRSA16T?

The MSP430G2112IRSA16T uses a 16-pin QFN package (RSA suffix) measuring 3 mm × 3 mm with 0.5 mm pitch and an exposed thermal pad. TI recommends connecting the pad directly to the PCB ground plane using multiple vias to ensure mechanical stability and optimal thermal dissipation. The pad is electrically tied to DVSS, so grounding it improves both thermal performance and noise immunity - critical for reliable operation in low-power analog-intensive applications.