Texas Instruments MSP430G2001IRSA16R

Overview

MSP430G2001IRSA16R from Texas Instruments is an ultralow-power 16-bit mixed-signal microcontroller featuring a 16-bit Timer_A with two capture/compare registers, 512 B flash memory, 128 B RAM, and 10 I/O pins in a 16-pin QFN package. It operates from 1.8 V to 3.6 V and supports five power-saving modes, enabling battery-powered sensor node applications requiring sub-µA standby current.

For engineers reviewing the MSP430G2001IRSA16R datasheet, MSP430G2001IRSA16R pinout, MSP430G2001IRSA16R application, or MSP430G2001IRSA16R equivalent, key selection criteria include active-mode current at 1 MHz (220 µA @ 2.2 V), LPM4 current (0.1 µA), brownout detection, Spy-Bi-Wire debug interface, and absence of integrated analog comparator - distinguishing it from MSP430G2x11 variants.

Technical Context

The MSP430G2001IRSA16R 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 LPM4 in under 1 µs. Its clock system includes ACLK (LF oscillator or 32-kHz crystal), SMCLK (DCO-derived), and MCLK (CPU clock), all configurable via BCSCTL registers.

It features a basic clock module with internal VLO (12 kHz), calibrated DCO (up to 16 MHz at VCC ≥ 3.3 V), and external crystal support. The device lacks Comparator_A+ circuitry - confirmed by Table 1 and functional block diagram - and omits CAx input pins and CAOUT functionality present in G2x11 family members.

Key Specifications

Pinout & Package

Package: 16-pin QFN (RSA), 3 mm × 3 mm, 0.5 mm pitch, exposed thermal pad recommended to be connected to DVSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2001IRSA16R, MSP430G2101IRSA16 offers double flash capacity without changing layout or firmware architecture, while MSP430G2001IPW14 trades crystal support for smaller footprint and lower assembly cost - both retain identical low-power behavior and I/O count.

Availability

MSP430G2001IRSA16R is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, and smart utility meters requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MSP430G2001IRSA16R 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 series targets cost-sensitive, battery-operated applications demanding ultralow power, integrated peripherals, and rapid development - exemplified by the MSP430G2001IRSA16R's optimized balance of flash, RAM, and timing resources.

FAQ

What is the maximum operating frequency of the MSP430G2001IRSA16R?

The MSP430G2001IRSA16R supports up to 16 MHz MCLK when VCC ≥ 3.3 V, 12 MHz at VCC = 2.7 V, and 6 MHz at VCC = 1.8 V. This is achieved via its calibrated digitally controlled oscillator (DCO), which stabilizes in less than 1 µs - enabling fast wake-up from low-power modes while maintaining timing precision across voltage ranges.

Does the MSP430G2001IRSA16R include an analog comparator?

No, the MSP430G2001IRSA16R does not include Comparator_A+. This is confirmed by Table 1 (Comp_A+ column shows "–" for MSP430G2001 variants), functional block diagrams, and pin descriptions - unlike MSP430G2x11 devices, it lacks CAx input pins and CAOUT functionality. Designers requiring analog comparison must add external circuitry or select a G2x11 variant.

What debug interface does the MSP430G2001IRSA16R support?

The MSP430G2001IRSA16R supports Spy-Bi-Wire (SBW) debug via pins RST/NMI/SBWTDIO (pin 9) and TEST/SBWTCK (pin 11). This two-wire interface enables full programming, breakpoint debugging, and real-time register inspection without requiring a full JTAG header - reducing PCB footprint and BOM cost compared to four-wire JTAG solutions.

How much flash memory does the MSP430G2001IRSA16R have, and is it segmented?

The MSP430G2001IRSA16R contains 512 B of main flash memory organized in one 512-byte segment, plus 256 B of information memory (segments A–D, 64 B each). Flash supports in-system programming via SBW, byte/word writes, and segment-level erase - with Segment A factory-calibrated for DCO and protected by default to preserve timing accuracy.

What are the key low-power mode current specifications for the MSP430G2001IRSA16R?

At 2.2 V and 25°C, the MSP430G2001IRSA16R draws 220 µA in Active Mode (1 MHz), 65 µA in LPM0, 22 µA in LPM2, 0.7 µA in LPM3 (LFXT1), 0.5 µA in LPM3 (VLO), and 0.1 µA in LPM4. These values enable precise power budgeting for energy-harvesting or coin-cell-powered systems where microampere-level leakage determines operational lifetime.