Texas Instruments MSP430F133IPM

Overview

MSP430F133IPM from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 8KB Flash, 256B RAM, a 12-bit ADC with 8 analog inputs, one USART (UART/SPI), two 16-bit timers (Timer_A3 and Timer_B3), and on-chip comparator. It operates from 1.8 V to 3.6 V and targets battery-powered sensor systems and portable measurement devices.

For engineers reviewing the MSP430F133IPM datasheet, MSP430F133IPM pinout, MSP430F133IPM application, or MSP430F133IPM equivalent, this page delivers verified specifications, functional block context, package-validated pin roles, real-world use cases in industrial sensing and handheld instrumentation, and two confirmed alternative MCUs for design flexibility.

Technical Context

The MSP430F133IPM implements a 16-bit CPU with constant generators and hardware multiplier, enabling high code efficiency in ultra-low-power embedded control. Its five power-saving modes-including Off mode with 0.1 µA RAM retention-and sub-6 µs wake-up from Standby support extended battery life in intermittent-sampling applications.

It integrates a 12-bit ADC with internal reference, sample-and-hold, and autoscan across eight channels (A0–A7), plus dual 16-bit timers with capture/compare capability and shadow registers for precise timing control in sensor signal conditioning and PWM-driven peripherals.

Key Specifications

Pinout & Package

LQFP-64 (10 mm × 10 mm) package with exposed thermal pad (connected to DVSS). Pin count and layout match TI's standard PM package designation for MSP430F13x series.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F133IPM, MSP430F135IPM offers double Flash/RAM with zero hardware changes, while MSP430F233IPM adds I²C and RAM at the cost of removing the comparator-making each suitable for distinct firmware and sensor-interface requirements.

Availability

MSP430F133IPM is available at Aetrix Electronics and suitable for industrial sensor nodes, handheld meters, and low-power data loggers requiring stable component supply and long-term production continuity.

Supply support for MSP430F133IPM 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 energy efficiency and reliability.

The MSP430F13x product line was designed specifically for ultra-low-power sensing and measurement applications where battery life, small footprint, and integrated analog peripherals are critical-targeting metering, environmental monitoring, and portable instrumentation.

FAQ

What is the maximum operating frequency of the MSP430F133IPM?

The MSP430F133IPM supports a maximum system clock (MCLK) frequency of 8 MHz when using the external XT2 oscillator. With the internal DCO, typical operation reaches up to 1 MHz in active mode under recommended conditions. The 125-ns instruction cycle time corresponds to a 8-MHz CPU clock, and all timing parameters in the datasheet-including ADC conversion and timer operation-are validated at this rate. MSP430F133IPM maintains full functionality across its 1.8 V to 3.6 V supply range at these frequencies.

Does the MSP430F133IPM include a hardware multiplier?

Yes, the MSP430F133IPM includes a 16-bit hardware multiplier module (MPY/MPYS/MAC/MACS) that executes multiply and multiply-accumulate operations in a single cycle. This accelerator significantly improves performance in firmware tasks such as digital filtering, sensor linearization, and checksum calculation-reducing CPU load and active-mode duration. The hardware multiplier is fully integrated into the CPU's instruction set and accessible via standard assembly or C compiler intrinsics in MSP430F133IPM development.

How many analog input channels does the MSP430F133IPM ADC support?

The MSP430F133IPM features a 12-bit ADC12 module with eight dedicated analog input channels: A0 through A7, mapped to pins P6.0 through P6.7 respectively. All eight channels support autoscan mode, allowing sequential conversion without CPU intervention. The ADC also accepts external reference voltages via VeREF+ and VREF−/VeREF− pins, and provides an internal 1.5-V or 2.5-V reference selectable in software. This configuration is fully documented for MSP430F133IPM in the SLAS272H datasheet.

Is the MSP430F133IPM pin-compatible with other MSP430F13x or MSP430F14x devices?

The MSP430F133IPM uses the LQFP-64 (PM) package and shares identical pinout with MSP430F135IPM, MSP430F147IPM, MSP430F148IPM, and MSP430F149IPM per TI's device comparison table and pin diagrams. However, functional differences exist: MSP430F133IPM has only one USART and Timer_B3 (3 registers), whereas MSP430F14x variants include two USARTs and Timer_B7 (7 registers). Thus, while PCB layout is interchangeable, firmware and peripheral initialization must be adapted for MSP430F133IPM's reduced peripheral set.

What debug interface does the MSP430F133IPM support?

The MSP430F133IPM supports the IEEE 1149.1 (JTAG) interface via four dedicated pins: TCK, TMS, TDI/TCLK, and TDO/TDI. This interface enables full-speed in-circuit emulation, flash programming, and real-time debugging using TI's MSP-FET or compatible tools. No external voltage is required-the JTAG fuse is programmable via the same interface. The MSP430F133IPM also supports Spy-Bi-Wire (2-wire JTAG) mode for space-constrained designs, reducing debug footprint while retaining full functionality.