Texas Instruments MSP430G2755IDA38R

Overview

MSP430G2755IDA38R from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller in 38-pin TSSOP (DA) package, featuring 32 kB flash, 4 kB RAM, 10-bit 200-ksps ADC with 12 channels, two 16-bit Timer_A modules, one 16-bit Timer_B module, USCI_A0/USCI_B0 serial interfaces, and on-chip comparator. It targets battery-powered sensor nodes requiring precise analog capture, low-latency wake-up, and LIN-capable UART communication.

For engineers reviewing the MSP430G2755IDA38R datasheet, MSP430G2755IDA38R pinout, MSP430G2755IDA38R application, or MSP430G2755IDA38R equivalent, key selection criteria include its 32 I/O pins with touch-sense capability, 0.1 µA off-mode current with RAM retention, 1 µs wake-up from standby, integrated brownout detector, and support for Spy-Bi-Wire programming without external voltage.

Technical Context

The MSP430G2755IDA38R implements a 16-bit CPU with seven addressing modes and constant generators for high code efficiency. Its basic clock system integrates DCO (calibrated up to 16 MHz), 32-kHz crystal oscillator, and internal VLO - enabling flexible clock sourcing for active and low-power modes.

Five software-selectable low-power modes (LPM0–LPM4) are supported, with LPM4 drawing only 0.1 µA while retaining RAM. The USCI_A0 module delivers enhanced UART with auto-baudrate detection for LIN, IrDA encoding/decoding, SPI, and I²C; USCI_B0 adds synchronous SPI and I²C master/slave capability.

Key Specifications

Pinout & Package

Package: 38-pin Thin Shrink Small Outline Package (TSSOP), DA suffix, 0.65 mm pitch, body size 12.5 × 6.1 mm. RoHS-compliant, lead-free, moisture-sensitive level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2755IDA38R, MSP430G2855IDA38 offers headroom for feature-rich firmware and scalability, while MSP430G2452IDA38 trades capability for lower unit cost - making MSP430G2755IDA38R the optimal balance of memory, analog integration, and communication flexibility for mid-tier sensor edge devices.

Availability

MSP430G2755IDA38R is available at Aetrix Electronics and suitable for smart sensor nodes, industrial HMI panels, energy meter interfaces, and medical wearable monitors requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance.

Supply support for MSP430G2755IDA38R 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 design.

The MSP430G2xx family was engineered specifically for battery-operated measurement and sensing applications, emphasizing nanowatt power management, integrated analog front-ends, and robust in-field programmability.

FAQ

What is the maximum operating frequency of the MSP430G2755IDA38R?

The MSP430G2755IDA38R supports a maximum system clock (MCLK) frequency of 16 MHz, achieved using the calibrated internal DCO or external HF crystal. This frequency is fully operational across the 1.8–3.6 V supply range and enables deterministic real-time execution of time-critical tasks such as ADC sampling and UART transmission within the MSP430G2755IDA38R's architecture.

Does the MSP430G2755IDA38R support hardware UART auto-baudrate detection?

Yes, the MSP430G2755IDA38R's USCI_A0 module includes dedicated auto-baudrate detection logic compliant with LIN 2.2 specifications. This feature allows the MSP430G2755IDA38R to automatically synchronize to incoming LIN header byte timing without CPU intervention, reducing firmware overhead and improving protocol robustness in automotive sub-networks.

How many analog input channels does the ADC10 in the MSP430G2755IDA38R support?

The ADC10 in the MSP430G2755IDA38R supports 12 analog input channels (A0–A7, A12–A15), with configurable reference sources (internal 1.5 V/2.5 V or external). Channel selection, sampling rate, and autoscan sequencing are fully programmable in hardware - enabling continuous monitoring of multiple sensors without CPU polling in the MSP430G2755IDA38R.

Can the MSP430G2755IDA38R perform in-system programming without external voltage?

Yes, the MSP430G2755IDA38R supports serial onboard programming via its built-in bootstrap loader (BSL), accessible through USCI_A0 UART using only VCC, GND, and two I/O pins. No external programming voltage (e.g., 3.3 V or 12 V) is required - the MSP430G2755IDA38R derives all necessary programming power from the standard 1.8–3.6 V supply rail.

What low-power modes are available on the MSP430G2755IDA38R, and what is the lowest current draw?

The MSP430G2755IDA38R offers five software-configurable low-power modes (LPM0–LPM4). In LPM4 (off mode with RAM retention), it draws just 0.1 µA at 3 V and 25°C - preserving full 4 kB RAM content while disabling all clocks and peripherals. This enables multi-year operation from primary lithium batteries in the MSP430G2755IDA38R-based designs.