Texas Instruments MSP430F2131TDGVR

Overview

MSP430F2131TDGVR from Texas Instruments is an ultra-low-power 16-bit 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 node applications requiring long runtime and analog signal conditioning.

For engineers reviewing the MSP430F2131TDGVR datasheet, MSP430F2131TDGVR pinout, MSP430F2131TDGVR application, or MSP430F2131TDGVR equivalent, key selection criteria include its -40°C to 105°C extended temperature rating, 20-pin TVSOP (DGV) package, integrated DCO with four factory-calibrated frequencies up to 16 MHz, and JTAG/BSL programmability without external voltage.

Technical Context

The MSP430F2131TDGVR 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 support, and high-frequency crystal input up to 16 MHz - all configurable via BCSCTL registers.

It features two 8-bit I/O ports (P1, P2) with individually programmable pullup/pulldown resistors and edge-selectable interrupts, plus a Comparator_A+ module supporting eight analog inputs (CA0–CA7) and slope A/D conversion. The device enters LPM4 with only 0.1 μA supply current while retaining RAM.

Key Specifications

Pinout & Package

Package: 20-pin Thin Very Small Outline Package (TVSOP), body size 4.4 mm × 6.5 mm, 0.65 mm lead pitch, exposed thermal pad connected to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F2132TDGVR, the MSP430F2131TDGVR saves die area and cost by omitting UART logic while retaining full analog/timing capability; versus MSP430F2013TRHBT, it delivers 4× flash, double RAM, extended DCO range, and higher temperature grade - making it optimal for feature-rich, long-life industrial sensors.

Availability

MSP430F2131TDGVR is available at Aetrix Electronics and suitable for smart utility meters, industrial temperature monitors, and portable gas detectors requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for MSP430F2131TDGVR 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 microcontroller innovation.

The MSP430F2131TDGVR belongs to the MSP430x21x1 ultra-low-power mixed-signal MCU family, designed specifically for battery-operated sensor systems requiring precision analog measurement, minimal active/standby current, and robust operation in harsh environments.

FAQ

What is the maximum operating frequency of the MSP430F2131TDGVR?

The MSP430F2131TDGVR 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 internal digitally controlled oscillator (DCO) with factory-calibrated 16 MHz setting. At lower supply voltages (e.g., 2.2 V), the maximum reliable frequency drops to 6 MHz per TI's recommended operating conditions. The MSP430F2131TDGVR does not require external crystals to reach these speeds due to its calibrated DCO.

Does the MSP430F2131TDGVR support in-system programming without a JTAG debugger?

Yes, the MSP430F2131TDGVR includes a UART-based bootstrap loader (BSL) that enables in-system programming via pins P1.1 (TX) and P2.2 (RX). No JTAG interface or external programming voltage is required. The BSL is protected by a user-defined password and can be disabled via security key 0xAA55 stored at address 0xFFDE. This allows field firmware updates using simple serial interfaces, making the MSP430F2131TDGVR ideal for deployed sensor nodes where physical access to JTAG is impractical.

What analog inputs are available on the MSP430F2131TDGVR for the comparator module?

The MSP430F2131TDGVR's Comparator_A+ module supports eight analog input channels: CA0 through CA7. These map to physical pins P2.3 (CA0), P2.4 (CA1), P2.5 (CA5), P2.0 (CA2), P2.1 (CA3), P2.2 (CA4), P2.6 (CA6), and P2.7 (CA7). All eight inputs are selectable via software control registers (CACTL1/CACTL2), enabling flexible routing of external sensor signals or internal references. The comparator output (CAOUT) is accessible on P2.2 and can trigger Timer_A for slope A/D conversion without CPU intervention.

How does the MSP430F2131TDGVR achieve ultra-low-power standby operation?

The MSP430F2131TDGVR achieves 0.7 μA standby (LPM3) and 0.1 μA off-mode (LPM4) current by disabling all clocks except ACLK in LPM3, and stopping the crystal oscillator and all internal oscillators in LPM4 while retaining RAM contents. Its five software-selectable low-power modes allow precise trade-offs between wake-up latency and current draw. The <1 μs wake-up from LPM4 is enabled by the fast-stabilizing DCO, which resumes full-speed operation before the first instruction executes - a key enabler for energy harvesting and intermittent sensing applications using the MSP430F2131TDGVR.

Is the MSP430F2131TDGVR pin-compatible with other devices in the MSP430F21x1 family?

Yes, the MSP430F2131TDGVR is pin-compatible with all 20-pin TVSOP (DGV) variants in the MSP430F21x1 family, including MSP430F2101TDGVR, MSP430F2111TDGVR, and MSP430F2121TDGVR. They share identical pin functions, electrical characteristics, and package dimensions. Firmware developed for one variant can run on another with only flash/RAM size and peripheral availability differences - for example, migrating from MSP430F2121TDGVR (4 KB flash) to MSP430F2131TDGVR (8 KB flash) requires no PCB change but enables larger application code and calibration tables.