Texas Instruments MSP430F133IPMR

Overview

MSP430F133IPMR from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 8KB Flash, 256B RAM, a 12-bit ADC with 8 channels and internal reference, 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 MSP430F133IPMR datasheet, MSP430F133IPMR pinout, MSP430F133IPMR application, or MSP430F133IPMR equivalent, key selection criteria include its single USART interface, 48 I/O pins, 8KB Flash/256B RAM memory configuration, wake-up time under 6 µs from standby, and LQFP-64 packaging for industrial-grade layout compatibility.

Technical Context

The MSP430F133IPMR 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-are optimized for extended battery life in intermittent-sensing applications.

It integrates a 12-bit ADC with sample-and-hold and autoscan, supporting up to 8 analog inputs (A0–A7) with <10 µs conversion time. The device uses a digitally controlled oscillator (DCO) for fast wake-up and supports external crystals (LFXT1 and XT2) alongside internal resistor-controlled clock tuning via ROSC.

Key Specifications

Pinout & Package

LQFP-64 package (10 mm × 10 mm, 0.5 mm pitch), RoHS-compliant, with 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 MSP430F133IPMR, the MSP430F135IPMR offers double the Flash and RAM while maintaining full pin and peripheral compatibility-ideal for firmware scalability. The MSP430F2330IRHBT trades I/O count and Timer_B3 for higher clock rate and compact packaging, better suited to cost- and size-sensitive consumer applications.

Availability

MSP430F133IPMR is available at Aetrix Electronics and suitable for sensor systems, industrial controls, and hand-held meters requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for MSP430F133IPMR 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, reliability, and system integration.

The MSP430F13x product line was designed specifically for ultra-low-power sensing and measurement applications where battery life, precision analog integration, and deterministic real-time response are critical.

FAQ

What is the maximum operating frequency of the MSP430F133IPMR?

The MSP430F133IPMR features a digitally controlled oscillator (DCO) that supports up to 8 MHz operation under recommended conditions. Its 16-bit RISC architecture delivers a 125-ns instruction cycle time at this frequency, enabling efficient execution of real-time control tasks without external high-speed clocks. The DCO's calibration allows stable operation across voltage and temperature ranges, and the MSP430F133IPMR can also use external crystals (LFXT1 or XT2) for higher precision timing when needed.

Does the MSP430F133IPMR support in-system programming?

Yes, the MSP430F133IPMR supports in-system programming via its built-in bootloader (BSL), which operates through the UART interface using standard serial commands. No external programming voltage is required-the BSL is activated by specific pin states at power-on or reset, and it allows full Flash and RAM programming without JTAG hardware. This capability simplifies field firmware updates and eliminates the need for dedicated programmers during development or maintenance of deployed MSP430F133IPMR-based devices.

How many analog input channels does the MSP430F133IPMR ADC support?

The MSP430F133IPMR integrates a 12-bit ADC with eight dedicated analog input channels (A0–A7), mapped to pins P6.0 through P6.7. These inputs support both single-ended and differential configurations, and the ADC includes internal reference voltage generation, sample-and-hold, and hardware autoscan-enabling automatic sequential conversion across all enabled channels without CPU intervention. This makes the MSP430F133IPMR well-suited for multi-sensor data acquisition in compact, low-power systems.

Is the MSP430F133IPMR pin-compatible with other devices in the MSP430F1xx family?

The MSP430F133IPMR shares the same 64-pin LQFP package and pinout with MSP430F135IPMR, MSP430F147IPMR, MSP430F148IPMR, and MSP430F149IPMR, making it mechanically and electrically compatible at the board level. However, peripheral differences exist-such as Timer_B channel count (3 vs. 7) and USART quantity (1 vs. 2)-so firmware and signal routing must be verified per device. Pin compatibility enables drop-in replacement only within the MSP430F13x subfamily (e.g., MSP430F133IPMR ↔ MSP430F135IPMR).

What power supply domains does the MSP430F133IPMR require?

The MSP430F133IPMR requires two independent supply domains: DVCC/DVSS for digital logic (1.8–3.6 V) and AVCC/AVSS for analog circuitry including the ADC and comparator. Proper separation-using separate traces, ferrite beads, or LC filters-and local decoupling (e.g., 100 nF ceramic capacitors near each supply pin) are essential to maintain ADC accuracy and noise immunity. The device does not integrate a voltage regulator, so external LDOs or DC-DC converters must meet the specified voltage and ripple requirements for both domains.