Texas Instruments MSP430F148IRTDT

Overview

MSP430F148IRTDT from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller with 48KB flash, 2KB RAM, dual USARTs, 12-bit ADC (8-channel), two 16-bit timers (Timer_A3 and Timer_B7), on-chip comparator, and JTAG debug interface. It operates from 1.8 V to 3.6 V and supports five power-saving modes - ideal for battery-powered sensor nodes and portable instrumentation.

For engineers reviewing the MSP430F148IRTDT datasheet, MSP430F148IRTDT pinout, MSP430F148IRTDT application, or MSP430F148IRTDT equivalent, this page delivers verified functional specs, validated package mapping (64-pin VQFN, 9 mm × 9 mm), confirmed pin roles per TI SLAS272H Rev. May 2018, and real-world use context for industrial sensing, metering, and low-duty-cycle control systems.

Technical Context

The MSP430F148IRTDT implements a 16-bit CPU with constant generators and hardware multiplier, enabling high code efficiency in ultra-low-power operation. Its clock system integrates DCO, ACLK, SMCLK, and MCLK domains with support for LFXT1 (32.768 kHz watch crystal) and XT2 (up to 8 MHz standard crystal) oscillators.

Peripherals include a 12-bit ADC12 with internal reference, sample-and-hold, autoscan, and <10 µs conversion time; Timer_B7 with seven capture/compare registers and shadow registers for PWM synchronization; and two full-duplex USARTs configurable as UART or SPI - all accessible via 48 GPIO pins across six I/O ports.

Key Specifications

Pinout & Package

Package: VQFN-64 (RTD), 9 mm × 9 mm body, 0.5 mm pitch, exposed thermal pad connected to DVSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F148IRTDT, the MSP430F149IRTDT offers greater firmware scalability while maintaining drop-in compatibility, whereas the MSP430F148IPM provides identical functionality in a more serviceable package - enabling design flexibility across production and evaluation phases.

Availability

MSP430F148IRTDT is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, and portable handheld testers requiring stable component supply, long-term lifecycle assurance, and TI-authorized traceability.

Supply support for MSP430F148IRTDT 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 reliability, longevity, and industrial-grade qualification.

The MSP430F14x family was designed specifically for ultra-low-power sensing, measurement, and control applications - prioritizing energy efficiency, integrated analog peripherals, and robust operation across extended temperature ranges.

FAQ

What is the maximum operating frequency of the MSP430F148IRTDT?

The MSP430F148IRTDT does not have a fixed maximum clock frequency rating; its DCO can be calibrated up to approximately 8 MHz using the internal calibration constants or external crystals (XT2). The CPU executes instructions at 125 ns per cycle, supporting effective throughput up to 8 MIPS under typical conditions. Actual sustained frequency depends on supply voltage, temperature, and clock source selection - as specified in Section 5.18 of the SLAS272H datasheet.

Does the MSP430F148IRTDT support hardware UART with automatic baud rate detection?

No, the MSP430F148IRTDT USART modules do not implement automatic baud rate detection. They support standard UART mode with programmable oversampling (8x or 16x) and configurable clock sources (ACLK, SMCLK, or internal modulated DCO), but require explicit baud rate register setup. Asynchronous communication must be initialized with known timing parameters - no built-in autobaud logic is present in the MSP430F148IRTDT's USART0 or USART1 peripherals.

Can the MSP430F148IRTDT's ADC perform continuous conversions without CPU intervention?

Yes, the MSP430F148IRTDT's ADC12 module supports autoscan mode with memory buffer addressing, allowing fully autonomous sequential conversions across multiple channels into RAM without CPU involvement. Conversion triggers can originate from timer outputs, software commands, or external signals, and end-of-sequence interrupts notify the CPU only after completion - enabling efficient low-power data acquisition.

Is the MSP430F148IRTDT pin-compatible with the MSP430F149IRTDT?

Yes, the MSP430F148IRTDT and MSP430F149IRTDT share identical 64-pin VQFN (RTD) package dimensions, pinout, and signal assignments - including power, ground, JTAG, and all peripheral I/O functions. This makes them functionally and physically interchangeable on the same PCB layout, differing only in flash capacity (48KB vs. 60KB) and associated memory-mapped behavior.

What is the purpose of the P5.7/TBOUTH pin on the MSP430F148IRTDT?

The P5.7/TBOUTH pin on the MSP430F148IRTDT serves as the Timer_B output high-impedance control signal. When asserted, it places all Timer_B output pins (TB0–TB6) into high-impedance state - essential for safe PWM output disabling during fault conditions, motor phase commutation, or shared-bus contention. It is not a general-purpose I/O and must be configured via TBCTL register bit TBOUTH to activate this function.