Texas Instruments MSP430G2533IPW28R

Overview

MSP430G2533IPW28R from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 16 KB flash, 512 B RAM, a 10-bit 200-ksps ADC with 8 channels, two 16-bit Timer_A modules, USCI with UART/LIN/IrDA/SPI/I²C, and capacitive-touch-capable I/O-designed for battery-powered sensor interface and power management systems.

For engineers reviewing the MSP430G2533IPW28R datasheet, MSP430G2533IPW28R pinout, MSP430G2533IPW28R application, or MSP430G2533IPW28R equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for low-power embedded design selection.

Technical Context

The MSP430G2533IPW28R implements a 16-bit CPU with constant generators and a digitally controlled oscillator (DCO) enabling sub-1-µs wake-up from LPM3/LPM4. Its clock system supports internal calibrated frequencies up to 16 MHz, 32-kHz crystal, and external digital sources-optimized for deterministic timing in energy-constrained applications.

It integrates dual 16-bit Timer_A peripherals (each with three capture/compare registers), a 10-bit ADC with internal reference and autoscan, brownout detection, and Spy-Bi-Wire on-chip emulation-enabling compact, self-contained measurement and control without external timing or debug infrastructure.

Key Specifications

Pinout & Package

TSSOP-28 (PW28) package: 9.7 mm × 4.4 mm body, 0.65 mm pitch, surface-mount compatible with standard reflow profiles. Pin 1 marked by dot; thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2433IPW28R, the MSP430G2533IPW28R adds 8 KB flash and full 10-bit ADC capability-making it essential for autonomous sensor processing. Against MSP430FR2355TRHBR, it trades FRAM endurance for guaranteed on-chip reference accuracy and lower active power at sub-1-MHz operation.

Availability

MSP430G2533IPW28R is available at Aetrix Electronics and suitable for smart sensor nodes, industrial power monitors, capacitive touch interfaces, and low-cost motor control systems requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance.

Supply support for MSP430G2533IPW28R 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 expertise in ultra-low-power microcontroller architecture and industrial-grade reliability.

The MSP430G2x33 product line targets cost-sensitive, battery-operated applications demanding high integration, minimal external components, and proven low-power operation-especially in sensor, metering, and human-interface markets.

FAQ

What is the maximum system clock frequency supported by the MSP430G2533IPW28R?

The MSP430G2533IPW28R supports a maximum MCLK frequency of 16 MHz at VCC = 3.3 V with 50% ±10% duty cycle. At 2.7 V, max frequency drops to 12 MHz; at 1.8 V, it is limited to 6 MHz. These limits are defined in the Recommended Operating Conditions table and reflect safe timing margins for flash execution and peripheral operation. The DCO is factory-calibrated at four frequencies, including 1 MHz, 8 MHz, 12 MHz, and 16 MHz.

Does the MSP430G2533IPW28R include hardware support for capacitive touch sensing?

Yes, the MSP430G2533IPW28R supports capacitive touch sensing on up to 24 I/O pins without external components. This capability leverages the device's built-in comparator, timer, and GPIO structure-enabling robust touch button, slider, and wheel implementations using TI's CapTIvate™ software library. Port P1, P2, and P3 pins (where available in the TSSOP-28 package) can be configured for this function.

Can the MSP430G2533IPW28R operate from a single 1.8-V supply?

Yes, the MSP430G2533IPW28R is fully specified for operation from 1.8 V to 3.6 V. At 1.8 V, it delivers 6 MHz system clock performance, 230 µA active current at 1 MHz, and retains all core peripherals-including ADC, USCI, and Timer_A. Brownout detection remains functional across the full voltage range, ensuring reliable reset behavior during battery discharge.

What debug interface does the MSP430G2533IPW28R use, and how many pins are required?

The MSP430G2533IPW28R uses the Spy-Bi-Wire (SBW) interface, which requires only two pins: RST/NMI/SBWTDIO (pin 24) and TEST/SBWTCK (pin 25). This 2-wire protocol is fully compatible with TI's MSP-FET and LaunchPad debuggers, enabling full-speed programming, breakpoint setting, and real-time variable inspection without occupying additional GPIO resources.

Is the ADC on the MSP430G2533IPW28R capable of autonomous operation without CPU intervention?

Yes, the 10-bit ADC on the MSP430G2533IPW28R supports autoscan mode, allowing sequential conversion across up to 8 channels triggered by Timer_A or software-while storing results directly to memory via DMA-like register auto-increment. Combined with interrupt-on-completion, this enables fully autonomous sensor polling cycles with CPU remaining in LPM3 until data is ready.