Texas Instruments MSP430F2131TDGV

Overview

MSP430F2131TDGV from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 8 KB flash memory, 256 B RAM, a 16-bit Timer_A with three capture/compare registers, and an on-chip analog comparator for slope A/D conversion. It operates from 1.8 V to 3.6 V and supports active-mode current of 250 μA at 1 MHz/2.2 V, enabling battery-powered sensor systems and portable measurement devices.

For engineers reviewing the MSP430F2131TDGV datasheet, MSP430F2131TDGV pinout, MSP430F2131TDGV application, or MSP430F2131TDGV equivalent, key selection criteria include its -40°C to 105°C extended temperature grade, TVSOP-20 package, integrated DCO with four factory-calibrated frequencies (1/8/12/16 MHz), and JTAG + BSL programming support - all critical for industrial sensor node and low-power embedded control designs.

Technical Context

The MSP430F2131TDGV implements a 16-bit RISC CPU with constant generators and seven addressing modes, achieving 62.5-ns instruction cycle time. Its basic clock module integrates a digitally controlled oscillator (DCO), 32-kHz crystal input (XIN/XOUT), and high-frequency crystal support up to 16 MHz - enabling sub-1-μs wake-up from LPM4 standby mode.

Peripherals include two 8-bit I/O ports (P1/P2) with individually configurable pullup/pulldown resistors and edge-selectable interrupts, a 16-bit Timer_A3 supporting PWM, capture/compare, and interval timing, and Comparator_A+ with eight-channel analog input multiplexing (CA0–CA7) for precision slope ADC or battery-voltage supervision.

Key Specifications

Pinout & Package

Package: 20-pin TVSOP (Thin Very Small Outline Package), body width 4.4 mm, lead pitch 0.65 mm, JEDEC MO-153 compliant. Thermal pad not present - no exposed die attach pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F2132TDGV, the MSP430F2131TDGV trades integrated ADC and serial peripherals for lower cost and guaranteed ±1% DCO accuracy - making it optimal for analog-threshold detection and ultra-low-power timing-critical tasks. Against MSP430G2553IPW20, it delivers superior factory-trimmed clock stability and industrial temperature qualification at modest premium.

Availability

MSP430F2131TDGV is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical diagnostics, and smart energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MSP430F2131TDGV 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 over 90 years of innovation in low-power design.

The MSP430F2131TDGV belongs to the MSP430x2xx ultra-low-power microcontroller family, engineered specifically for battery-operated measurement systems demanding nanowatt-level standby power, fast wake-up, and integrated analog signal conditioning.

FAQ

What is the maximum operating frequency of the MSP430F2131TDGV?

The MSP430F2131TDGV supports a maximum system clock (MCLK) frequency of 16 MHz when VCC ≥ 3.3 V and duty cycle is 50% ±10%. This is achieved using the factory-calibrated DCO or an external high-frequency crystal. At lower supply voltages (e.g., 2.2 V), the maximum supported frequency drops to 6 MHz per TI's recommended operating conditions. The CPU executes instructions at MCLK rate with 62.5-ns cycle time at 16 MHz.

Does the MSP430F2131TDGV support hardware UART or SPI communication?

No, the MSP430F2131TDGV does not include dedicated hardware UART, SPI, or I²C peripherals. Communication is implemented via software bit-banging or the Bootstrap Loader (BSL) using P1.1 (TX) and P2.2 (RX) pins. For hardware serial interfaces, consider the pin-compatible MSP430F2132TDGV, which adds USCI modules supporting UART, SPI, and I²C protocols.

What is the purpose of the TEST pin on the MSP430F2131TDGV?

On the MSP430F2131TDGV, the TEST pin (Pin 1) enables JTAG test mode when pulled high during power-up. It connects internally to the JTAG fuse and controls access to the Embedded Emulation Module (EEM). After blowing the JTAG fuse for security, the TEST pin becomes permanently disabled - preventing unauthorized debugging or flash reprogramming. TI recommends leaving TEST unconnected unless actively using JTAG.

Can the MSP430F2131TDGV perform analog-to-digital conversion without external components?

Yes, the MSP430F2131TDGV can perform analog-to-digital conversion using its integrated Comparator_A+ module in slope ADC mode. By charging a capacitor through a current source and comparing against input voltage with Timer_A, it achieves effective 10–12-bit resolution without external ADC ICs or precision references. This method is ideal for slow-varying sensor signals like temperature or battery voltage monitoring.

What are the key differences between the MSP430F2131TDGV and MSP430F2131IDGV?

The MSP430F2131TDGV and MSP430F2131IDGV share identical electrical specifications and functionality but differ in temperature qualification: the 'T' suffix denotes -40°C to +105°C operation, while the 'I' suffix specifies -40°C to +85°C. Both use the same TVSOP-20 (DGV) package and pinout. The T-grade version undergoes additional screening for extended thermal performance, making it suitable for under-hood automotive or industrial control applications.