Texas Instruments MSP430G2403IPW20

Overview

MSP430G2403IPW20 from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller in 20-pin TSSOP package, featuring 8 KB flash, 512 B RAM, two 16-bit Timer_A modules with three capture/compare registers each, USCI with UART/IrDA/SPI/I²C support, and a digitally controlled oscillator enabling sub-1-µs wake-up from standby mode. It targets battery-powered sensor interface and capacitive-touch applications requiring long runtime and compact footprint.

For engineers reviewing the MSP430G2403IPW20 datasheet, MSP430G2403IPW20 pinout, MSP430G2403IPW20 application, or MSP430G2403IPW20 equivalent, key selection criteria include its 1.8–3.6 V supply range, 230 µA active current at 1 MHz/2.2 V, Spy-Bi-Wire debug interface, absence of integrated ADC (distinguishing it from G2x33 variants), and 24-capacitive-touch-capable I/O pins - all critical for low-cost, energy-constrained embedded designs.

Technical Context

The MSP430G2403IPW20 implements a 16-bit CPU with constant generators and 62.5-ns instruction cycle time, paired with a flexible clock system including internal DCO (calibrated to 1, 8, 12, and 16 MHz), VLO, and external crystal support (32 kHz or high-frequency). Its power architecture supports five low-power modes, with LPM3/LPM4 wake-up times under 1 µs via DCO stabilization.

Peripheral integration centers on dual Timer_A modules (each with three CC registers), USCI_A0 (UART/LIN/IrDA/SPI) and USCI_B0 (SPI/I²C), and up to 16 GPIOs on P1/P2 with interrupt capability, pullup/pulldown resistors, and capacitive-touch sensing. Unlike G2x33 family members, it omits the 10-bit ADC and associated analog reference circuitry, reducing cost and die size while retaining core timing, communication, and I/O functionality.

Key Specifications

Pinout & Package

Package: 20-pin TSSOP (PW20), 6.5 mm × 4.4 mm body, 0.65 mm pitch, surface-mount. Compatible with standard reflow profiles per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2303IPW20, the MSP430G2403IPW20 offers double flash/RAM for more robust firmware and data logging; compared with MSP430G2433IPW20, it removes ADC circuitry to reduce cost and power in purely digital I/O or communication-centric designs.

Availability

MSP430G2403IPW20 is available at Aetrix Electronics and suitable for smart utility meters, industrial HMI panels, wireless environmental beacons, and motor monitoring systems requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance.

Supply support for MSP430G2403IPW20 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, embedded processing, and connectivity solutions with emphasis on energy efficiency, reliability, and design simplicity.

The MSP430G2x03 product line delivers ultra-low-power 16-bit microcontrollers optimized for cost-sensitive, battery-operated applications where extended runtime, small footprint, and integrated capacitive-touch I/O are essential design requirements.

FAQ

Does the MSP430G2403IPW20 include an integrated analog-to-digital converter (ADC)?

No, the MSP430G2403IPW20 does not include an ADC. It belongs to the G2x03 subfamily, which omits the 10-bit ADC present in G2x33 variants like MSP430G2433IPW20. All analog input pin designations (e.g., A0–A7) listed in the pinout refer to legacy naming from the broader family and are not functional as ADC inputs on the MSP430G2403IPW20. External ADCs or analog front-ends must be used for analog signal acquisition.

What debug interface does the MSP430G2403IPW20 support?

The MSP430G2403IPW20 supports Spy-Bi-Wire (SBW), a two-wire variant of JTAG implemented on pins RST/NMI/SBWTDIO (Pin 16) and TEST/SBWTCK (Pin 17). This interface enables full in-circuit debugging, flash programming, and real-time emulation using TI's MSP-FET programmer or compatible LaunchPad development kits. No external voltage or additional pins are required beyond these two signals and power/ground.

Can the MSP430G2403IPW20 drive capacitive-touch buttons directly?

Yes, the MSP430G2403IPW20 supports capacitive-touch sensing on all 16 GPIO pins of Ports P1 and P2 using its built-in charge-transfer hardware and integrated software libraries (e.g., MSP430 CapTIvate™). No external RC networks or dedicated touch controller ICs are needed. The device provides automatic calibration, noise immunity tuning, and low-power scan modes - making it ideal for touch-enabled consumer and industrial interfaces.

What is the maximum system clock frequency supported by the MSP430G2403IPW20?

The MSP430G2403IPW20 supports a maximum system clock (MCLK) frequency of 16 MHz when VCC ≥ 3.3 V, 12 MHz at VCC ≥ 2.7 V, and 6 MHz at VCC ≥ 1.8 V. These limits are defined by the DCO's calibrated frequencies and ensure stable operation across the full supply and temperature range. The device includes four factory-trimmed DCO calibration constants (1, 8, 12, and 16 MHz) accessible via BCSCTL1 and DCOCTL registers.

Is the MSP430G2403IPW20 pin-compatible with other devices in the MSP430G2x03 family?

Yes, the MSP430G2403IPW20 is fully pin-compatible with MSP430G2303IPW20 and MSP430G2203IPW20 in the 20-pin TSSOP (PW20) package. All share identical pin assignments, electrical characteristics, and peripheral mappings. Firmware and PCB layouts designed for one can be reused for another with only flash/RAM size and clock calibration adjustments required - simplifying migration across performance tiers within the same footprint.