Texas Instruments MSP430F133IPAG

Overview

MSP430F133IPAG 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 - designed for battery-powered sensor systems and portable measurement devices operating from 1.8 V to 3.6 V.

For engineers reviewing the MSP430F133IPAG datasheet, MSP430F133IPAG pinout, MSP430F133IPAG application, or MSP430F133IPAG equivalent, this page delivers verified technical context, exact package mapping (64-pin TQFP), confirmed peripheral configuration, real-world use-value metrics (e.g., <6 µs wake-up, 0.1 µA off-mode current), and validated alternative options for design continuity.

Technical Context

The MSP430F133IPAG 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 LPM3 with 1.6 µA standby and 0.1 µA RAM-retention off mode-are optimized for intermittent-sensing applications requiring rapid wake-up (<6 µs) and long battery life.

It integrates a 12-bit ADC12 with internal reference, sample-and-hold, autoscan, and <10 µs conversion time; one USART supporting asynchronous UART or synchronous SPI; and dual 16-bit timers (Timer_A3 with three capture/compare registers, Timer_B3 with three capture/compare registers and shadow registers). No second USART or extended Timer_B7 functionality is present - distinguishing it from MSP430F14x variants.

Key Specifications

Pinout & Package

Package: 64-pin TQFP (PAG), 10 mm × 10 mm body size, 0.5 mm pitch - RoHS-compliant, surface-mountable, and compatible with standard PCB assembly processes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power MCU applications.

Compared with MSP430F133IPAG, MSP430F135IPAG offers doubled memory for feature-rich firmware while maintaining full hardware compatibility, whereas MSP430F233IPAG introduces I²C and higher-speed operation at the cost of increased active power - making each suitable for distinct scalability or interface requirements.

Availability

MSP430F133IPAG is available at Aetrix Electronics and suitable for portable gas detectors, industrial temperature monitors, smart water meters, and asset tracking beacons requiring stable component supply, long-lifecycle assurance, and consistent ultra-low-power performance.

Supply support for MSP430F133IPAG 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 MSP430™ family was engineered specifically for ultra-low-power sensing and measurement applications - prioritizing nanowatt operation, fast wake-up, and integrated analog peripherals to minimize external component count in battery-constrained systems.

FAQ

What is the maximum operating frequency of the MSP430F133IPAG?

The MSP430F133IPAG operates at up to 8 MHz using the internal DCO oscillator, with typical stable operation at 1 MHz in active mode consuming 280 µA at 2.2 V. External crystal oscillators (LFXT1 and XT2) support frequencies up to 4 MHz and 8 MHz respectively, but the core CPU instruction rate remains bounded by the selected SMCLK source. The device does not support 16 MHz operation like later MSP430F2xx derivatives.

Does the MSP430F133IPAG support I²C communication?

No, the MSP430F133IPAG does not include native I²C hardware. It features one USART that supports only asynchronous UART and synchronous SPI modes. For I²C functionality, designers must implement bit-banged software I²C on GPIO pins - which increases CPU overhead and limits speed - or select a derivative such as the MSP430F233IPAG, which includes a USCI module with dedicated I²C support.

How many analog input channels does the MSP430F133IPAG ADC support?

The MSP430F133IPAG integrates the ADC12 module with eight selectable analog input channels (A0–A7), mapped exclusively to port P6.0 through P6.7. These inputs support single-ended or differential acquisition, internal/external reference selection, and autoscan sequencing - enabling simultaneous sampling across multiple sensors without external multiplexing hardware.

Is the MSP430F133IPAG pin-compatible with the MSP430F149IPAG?

No, the MSP430F133IPAG and MSP430F149IPAG share the same 64-pin TQFP (PAG) package and physical pinout, but they are not functionally pin-compatible. Key differences include: MSP430F149IPAG provides two USARTs and Timer_B7 (7 capture/compare registers), while MSP430F133IPAG has only one USART and Timer_B3 (3 registers); several pins (e.g., P3.6/P3.7, P4.3–P4.6, P5.0–P5.3) are reserved or unassigned on the MSP430F133IPAG. PCB reuse requires functional validation per pin.

What debug interface does the MSP430F133IPAG use?

The MSP430F133IPAG uses the standard 4-wire JTAG interface (TCK, TMS, TDI/TCLK, TDO/TDI) for programming and debugging - accessible via TI's MSP-FET or compatible emulators. It also supports Spy-Bi-Wire (SBW), a 2-wire variant using TCK and TMS only, which conserves board space and simplifies test point access. Both interfaces support full flash erase/write, breakpoint setting, and real-time register inspection during development.