Texas Instruments MSP430G2403IPW20R

Overview

MSP430G2403IPW20R from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller in 20-pin TSSOP package, featuring 8 KB flash, 512 B RAM, two 16-bit Timer_A modules, USCI with UART/I²C/SPI support, and a digitally controlled oscillator (DCO) enabling sub-1 µs wake-up from standby mode. It targets battery-powered sensor nodes and capacitive-touch interfaces requiring long runtime and compact footprint.

For engineers reviewing the MSP430G2403IPW20R datasheet, MSP430G2403IPW20R pinout, MSP430G2403IPW20R application, or MSP430G2403IPW20R 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.

Technical Context

The MSP430G2403IPW20R implements a 16-bit CPU with constant generators for optimized code density and executes instructions in 62.5 ns at 16 MHz. Its clock system integrates a DCO with four factory-calibrated frequencies (up to 16 MHz), internal VLO, and external crystal support (32 kHz or high-frequency via XIN/XOUT).

Power management includes five low-power modes (LPM0–LPM4), with standby mode drawing only 0.5 µA and off mode (RAM retention) consuming 0.1 µA. The USCI peripheral supports LIN-compliant UART with automatic baud-rate detection, IrDA encoding/decoding, synchronous SPI, and I²C master/slave operation - all configurable without external components.

Key Specifications

Pinout & Package

Package: 20-pin TSSOP (PW20), 6.5 mm × 4.4 mm body, 0.65 mm pitch, surface-mount. Pin count and I/O mapping match the 20-pin N/PW package variant defined in SLAS734G.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2403IPW20R, MSP430G2303IPW20R offers reduced memory at lower cost for minimal firmware, while MSP430G2433IPW20R adds essential ADC capability without changing PCB layout - enabling analog integration where signal conditioning is required.

Availability

MSP430G2403IPW20R is available at Aetrix Electronics and suitable for smart utility meters, capacitive-touch remotes, industrial temperature monitors, and asset tracking beacons requiring stable component supply across multi-year production cycles.

Supply support for MSP430G2403IPW20R 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 and system integration.

The MSP430G2xx family delivers ultra-low-power mixed-signal microcontrollers targeting cost-sensitive, battery-operated applications such as sensor nodes, touch interfaces, and portable instrumentation - balancing performance, power, and price.

FAQ

Does MSP430G2403IPW20R include an integrated analog-to-digital converter (ADC)?

No, MSP430G2403IPW20R does not include an ADC. It belongs to the G2x03 subfamily, which omits the 10-bit ADC present in G2x33 variants like MSP430G2433IPW20R. Analog signal acquisition requires external ADC interfacing via USCI or GPIO, confirmed by device comparison Table 3-1 and Section 1.3 of SLAS734G.

What debug interface does MSP430G2403IPW20R support?

MSP430G2403IPW20R supports Spy-Bi-Wire (SBW), a two-wire debug interface using pins RST/NMI/SBWTDIO (Pin 16) and TEST/SBWTCK (Pin 17). This enables full in-circuit emulation, flash programming, and breakpoint debugging without requiring a 4-wire JTAG header, reducing board space and connector cost.

What is the maximum system clock frequency supported by MSP430G2403IPW20R?

MSP430G2403IPW20R supports up to 16 MHz system clock (MCLK) when VCC ≥ 3.3 V, per Section 5.3 Recommended Operating Conditions. At 2.7 V, max frequency is 12 MHz; at 1.8 V, it is limited to 6 MHz. These limits apply to active-mode operation with 50% ±10% duty cycle.

Can MSP430G2403IPW20R drive capacitive touch buttons directly?

Yes, MSP430G2403IPW20R supports capacitive touch sensing on up to 24 I/O pins using its built-in RC oscillation timing capability. No external components are required - the firmware configures GPIO pins in specific modes to measure capacitance changes, as documented in the MSP430x2xx Family User's Guide (SLAU144).

Is MSP430G2403IPW20R pin-compatible with other devices in the G2xx family?

MSP430G2403IPW20R is pin-compatible with all 20-pin TSSOP (PW20) and PDIP (N20) variants in the G2x03 and G2x33 families, including MSP430G2303IPW20R and MSP430G2433IPW20R. Pin functions match per Figure 4-1 and Table 4-1, though ADC-related pins (e.g., VREF+/VREF−) are no-connect in G2x03 devices.