Texas Instruments MSP430F135IPM

Overview

MSP430F135IPM from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 16KB + 256B flash, 512B RAM, a 12-bit ADC with 8 analog inputs and <10 µs conversion time, one USART (UART/SPI), two 16-bit timers (Timer_A3 and Timer_B3), and on-chip comparator-designed for battery-powered sensor systems and portable measurement devices.

For engineers reviewing the MSP430F135IPM datasheet, MSP430F135IPM pinout, MSP430F135IPM application, or MSP430F135IPM equivalent, key selection considerations include its 48 I/O pins, LQFP-64 package, 1.8–3.6 V supply range, five power-saving modes, and wake-up from standby in <6 µs-critical for energy-constrained embedded designs.

Technical Context

The MSP430F135IPM implements a 16-bit CPU with constant generators and hardware multiplier, enabling high code efficiency in low-power operation. Its clock system integrates DCO, ACLK, SMCLK, and MCLK domains, with programmable divider support and external crystal oscillator interfaces (XT1 and XT2).

Peripherals are tightly coupled to the bus architecture: the 12-bit ADC12 supports internal reference, sample-and-hold, autoscan, and temperature sensor input; Timer_B3 provides seven capture/compare registers with shadow registers for glitch-free PWM; and the single USART0 supports asynchronous UART and synchronous SPI protocols with full-duplex operation.

Key Specifications

Pinout & Package

LQFP-64 package (10 mm × 10 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad (connected to DVSS), suitable for industrial and portable PCB layouts requiring mechanical robustness and thermal reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F133IPM, the MSP430F135IPM doubles flash and RAM for more sophisticated algorithms; compared with MSP430F149IPM, it trades memory and dual USART capability for lower cost and power in single-interface applications.

Availability

MSP430F135IPM is available at Aetrix Electronics and suitable for smart metering, portable instrumentation, industrial monitoring, and battery-powered sensor networks requiring stable component supply and long-term manufacturability.

Supply support for MSP430F135IPM 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 MCU innovation.

The MSP430F13x product line was engineered specifically for ultra-low-power sensing and measurement applications-emphasizing energy efficiency, integrated analog peripherals, and robust operation across extended temperature ranges.

FAQ

What is the maximum operating frequency of the MSP430F135IPM?

The MSP430F135IPM operates with a digitally controlled oscillator (DCO) that supports up to 8 MHz under typical conditions. Its 16-bit RISC core achieves a 125-ns instruction cycle time, enabling deterministic real-time execution without external clock dependency. The DCO frequency is calibrated and adjustable via software, and external crystals (LFXT1 or XT2) can be used for higher precision timing if required.

Does the MSP430F135IPM support in-system programming?

Yes, the MSP430F135IPM supports in-system programming via its built-in bootstrap loader (BSL) using UART or SPI through dedicated pins (e.g., P3.4/UTXD0 and P3.5/URXD0). No external programming voltage is needed-the BSL operates from the main supply (1.8–3.6 V), and code protection is enforced by a security fuse that disables read access after programming.

How many analog input channels does the ADC support on the MSP430F135IPM?

The MSP430F135IPM features the ADC12 module with eight selectable analog input channels (A0–A7), mapped to P6.0 through P6.7. It supports both internal reference (2.5 V) and external reference (VeREF+) configurations, and includes sample-and-hold, autoscan, and temperature sensor integration-all accessible without CPU intervention.

Is the MSP430F135IPM pin-compatible with other devices in the MSP430F13x or MSP430F14x families?

Yes, the MSP430F135IPM shares the same LQFP-64 pinout and electrical characteristics with MSP430F133IPM and all MSP430F14x/14x1 devices in the PM package. This allows direct PCB reuse across variants-though firmware must account for differences in flash size, RAM, and peripheral count (e.g., MSP430F149IPM adds USART1 and Timer_B7).

What are the supported low-power modes on the MSP430F135IPM?

The MSP430F135IPM implements five low-power modes (LPM0–LPM4), each progressively disabling clocks and peripherals to reduce current draw. LPM3 retains RAM and watchdog operation while stopping CPU and MCLK; LPM4 shuts down all internal sources except the RST/NMI pin wakeup path. Wake-up from LPM3 occurs in under 6 µs, making it ideal for event-driven sensing.