Texas Instruments MSP430F135IRTDT

Overview

MSP430F135IRTDT from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller with 16KB+256B flash, 512B RAM, 12-bit ADC (8-channel), single USART, two 16-bit timers (Timer_A3 and Timer_B3), on-chip comparator, and JTAG debugging interface - designed for battery-powered sensor systems and portable measurement devices operating from 1.8 V to 3.6 V.

For engineers reviewing the MSP430F135IRTDT datasheet, MSP430F135IRTDT pinout, MSP430F135IRTDT application, or MSP430F135IRTDT equivalent, key selection considerations include its 48 I/O pins, 64-pin VQFN (RTD) package, 12-bit ADC conversion time under 10 µs, wake-up from standby in <6 µs, and single-USART constraint versus dual-USART F14x variants.

Technical Context

The MSP430F135IRTDT implements a 16-bit CPU with constant generators and hardware multiplier for optimized code efficiency in low-power embedded control. Its clock system integrates DCO, ACLK, SMCLK, and MCLK domains with support for external crystals (LFXT1 and XT2) and internal resistor-controlled oscillator (ROSC).

It features one 16-bit Timer_A with three capture/compare registers and one 16-bit Timer_B with three capture/compare registers and shadow registers - enabling precise PWM generation, input capture, and interval timing without CPU intervention. The 12-bit ADC supports internal reference, sample-and-hold, and autoscan across eight analog inputs (A0–A7).

Key Specifications

Pinout & Package

The MSP430F135IRTDT is housed in a 64-pin VQFN (RTD) package measuring 9 mm × 9 mm with exposed thermal pad (connected to DVSS). Pin functions are identical to MSP430F133 in RTD package per TI SLAS272H Rev. May 2018.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F135IRTDT, MSP430F133IRTDT offers lower cost and identical low-power behavior but constrains firmware scalability, while MSP430F149IPM delivers significantly expanded peripheral set and memory at the expense of higher active current and package size - making MSP430F135IRTDT the optimal balance for mid-complexity, battery-critical sensor nodes.

Availability

MSP430F135IRTDT is available at Aetrix Electronics and suitable for industrial sensor nodes, portable energy meters, and smart building occupancy detectors requiring stable component supply and long-term manufacturability.

Supply support for MSP430F135IRTDT 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 power efficiency and reliability.

The MSP430F13x product line targets ultra-low-power portable instrumentation and battery-operated sensing applications, emphasizing rapid wake-up, integrated analog peripherals, and minimal active/sleep current - all within a scalable 16-bit architecture.

FAQ

What is the maximum ADC sampling rate supported by the MSP430F135IRTDT?

The MSP430F135IRTDT's 12-bit ADC achieves conversion times under 10 µs when using the maximum ADC12CLK frequency of 5 MHz. With autoscan enabled across 8 channels and minimal setup overhead, sustained sampling rates up to 100 kSPS are achievable in burst mode - though effective throughput depends on software handling and clock source stability.

Does the MSP430F135IRTDT support crystal oscillators for precise timing?

Yes, the MSP430F135IRTDT supports two crystal oscillator circuits: LFXT1 (for 32.768 kHz watch crystals or low-frequency standards) and XT2 (for 400 kHz to 8 MHz standard crystals). Both are fully integrated with internal load capacitors and support automatic fault detection - enabling accurate real-time clock and high-speed system timing without external components.

Can the MSP430F135IRTDT operate reliably at 3.6 V supply voltage?

Yes, the MSP430F135IRTDT is rated for operation across 1.8 V to 3.6 V per its absolute maximum and recommended operating conditions. At 3.6 V, it delivers higher drive strength on I/O pins and improved noise immunity, while maintaining full functionality of ADC, timers, and USART - with active current scaling linearly per supply voltage.

How many general-purpose I/O pins does the MSP430F135IRTDT provide?

The MSP430F135IRTDT provides 48 general-purpose I/O pins distributed across Ports P1–P6, each configurable as digital input/output with interrupt capability. All 48 pins support peripheral multiplexing (e.g., timer capture, ADC input, USART signals), and Port P1/P2 pins include Schmitt-trigger inputs for robust noise rejection on asynchronous signals.

Is the MSP430F135IRTDT pin-compatible with other MSP430F1xx devices in the RTD package?

Yes, the MSP430F135IRTDT shares identical pinout and electrical characteristics with MSP430F133IRTDT in the 64-pin VQFN (RTD) package per TI SLAS272H. However, it is not pin-compatible with MSP430F14x or MSP430F14x1 devices in RTD - those variants repurpose several pins (e.g., P3.6/P3.7, P4.3–P4.6) for second USART and extended Timer_B functionality.