Texas Instruments MSP430G2453IPW28

Overview

MSP430G2453IPW28 from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 8 KB flash, 512 B RAM, 10-bit 200-ksps ADC with 8-channel autoscan, two 16-bit Timer_A modules (each with three capture/compare registers), USCI_A0 (UART/LIN/IrDA/SPI) and USCI_B0 (SPI/I²C), and an 8-channel analog comparator. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and portable instrumentation.

For engineers reviewing the MSP430G2453IPW28 datasheet, MSP430G2453IPW28 pinout, MSP430G2453IPW28 application, or MSP430G2453IPW28 equivalent, key selection criteria include its 28-pin TSSOP package, ADC10 integration, Spy-Bi-Wire debug interface, five low-power modes (including 0.1 µA off-mode with RAM retention), and capacitive-touch I/O capability on up to 24 pins.

Technical Context

The MSP430G2453IPW28 implements a 16-bit CPU with constant generators and seven addressing modes, executing instructions in 62.5 ns at 16 MHz. Its clock system integrates a digitally controlled oscillator (DCO), internal LF oscillator, and external 32-kHz crystal support, enabling sub-1-µs wake-up from LPM4.

Peripherals are memory-mapped and accessible via all CPU instructions. The device includes dedicated interrupt vectors for ADC10, USCI_A0/B0, Timer_A0/A1, comparator, and port interrupts - with priority-encoded vector table located at 0xFFFE–0xFFC0 - and supports in-system programming via Spy-Bi-Wire or UART-based BSL.

Key Specifications

Pinout & Package

Package: 28-pin TSSOP (PW28), 0.65 mm pitch, body size 9.7 × 4.4 mm, thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2453IPW28, the G2553 offers double flash capacity in identical packaging for scalable firmware, while the FR2476 replaces flash with FRAM for infinite write endurance and faster ADC burst capture - both retain full pin and peripheral compatibility but differ in memory architecture and endurance profile.

Availability

MSP430G2453IPW28 is available at Aetrix Electronics and suitable for smart sensor nodes, portable medical instruments, and industrial control panels requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for MSP430G2453IPW28 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 for industrial, automotive, and consumer markets.

The MSP430G2xx family was designed specifically for ultra-low-power battery-operated applications requiring integrated analog peripherals, rapid wake-up response, and minimal active current - targeting sensor systems, portable instrumentation, and energy harvesting devices.

FAQ

What is the maximum operating frequency of the MSP430G2453IPW28?

The MSP430G2453IPW28 supports a maximum CPU clock frequency of 16 MHz via its digitally controlled oscillator (DCO), calibrated at factory and stored in information memory segment A. This allows 62.5-ns instruction execution time. External clock sources (e.g., 32-kHz crystal or digital input on XIN) can also drive ACLK or SMCLK independently, but MCLK is derived from DCO or external high-frequency source.

Does the MSP430G2453IPW28 support capacitive touch sensing?

Yes, the MSP430G2453IPW28 supports capacitive touch sensing on all 24 I/O pins (P1.x, P2.x, P3.x) using its built-in pin-oscillator circuitry. No external RC components are required. The technique leverages the port's programmable internal pullup/pulldown resistors and timing resolution of Timer_A to measure capacitance changes - enabling slider, wheel, and button implementations with minimal firmware overhead.

What debug interface does the MSP430G2453IPW28 use?

The MSP430G2453IPW28 uses the two-wire Spy-Bi-Wire (SBW) interface for debugging and programming, accessed via pins 24 (RST/NMI/SBWTDIO) and 25 (TEST/SBWTCK). This interface provides full JTAG-equivalent functionality - including breakpoints, register inspection, and flash programming - using only two signals, reducing PCB routing complexity versus traditional 4-wire JTAG.

Is the ADC10 module available on all MSP430G2x53 variants?

Yes, the ADC10 module is a defining feature of the MSP430G2x53 family, including the MSP430G2453IPW28. As confirmed in the datasheet (SLAS735J, Table 1 and pin function notes), ADC10 is present on all G2x53 devices and absent on G2x13 variants. The MSP430G2453IPW28 provides eight analog input channels (A0–A7), internal 1.5 V reference, and autoscan capability - all accessible in the 28-pin TSSOP package.

Can the MSP430G2453IPW28 operate from a single 1.8-V supply?

Yes, the MSP430G2453IPW28 is fully specified to operate across a supply range of 1.8 V to 3.6 V. At 1.8 V, it maintains full functionality including ADC10 operation (with adjusted reference scaling), USCI communication, Timer_A, and all I/O features. Active current drops to ~150 µA at 1 MHz, and LPM4 current remains 0.1 µA - making it suitable for single-cell LiFePO₄ or dual-cell alkaline systems without regulation.