Texas Instruments MSP430F2131IRGER

Overview

MSP430F2131IRGER 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 nodes and portable measurement systems.

For engineers reviewing the MSP430F2131IRGER datasheet, MSP430F2131IRGER pinout, MSP430F2131IRGER application, or MSP430F2131IRGER equivalent, key selection criteria include its 20-pin QFN (RGE) package, calibrated DCO up to 16 MHz, brownout detection, JTAG-based on-chip emulation, and support for ultra-fast wake-up (<1 μs) from standby mode - critical for energy-constrained embedded designs.

Technical Context

The MSP430F2131IRGER 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 - all with four factory-calibrated frequencies (±1% accuracy).

Peripheral integration includes a 16-bit Timer_A3 with three independent capture/compare registers, an analog comparator (Comparator_A+) supporting eight-channel input multiplexing (CA0–CA7), and two 8-bit I/O ports (P1/P2) with individually configurable pullup/pulldown resistors, interrupt edge select, and port-level interrupt flags.

Key Specifications

Pinout & Package

Package: 20-pin QFN (RGE), 4 mm × 4 mm, 0.5 mm pitch, with 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 MSP430F2121IRGER, the MSP430F2131IRGER provides double flash capacity and full Timer_A3 functionality for complex state machines; versus MSP430F2132IRGER, it retains analog comparator flexibility for slope ADC and event-driven wake-up at the expense of integrated SAR resolution.

Availability

MSP430F2131IRGER is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, smart utility meters, and industrial condition monitors requiring stable component supply across long-lifecycle deployments.

Supply support for MSP430F2131IRGER 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 50 years of innovation in low-power design.

The MSP430F2131IRGER belongs to the MSP430x21x1 ultra-low-power microcontroller family, engineered for extended battery life in portable measurement, sensor interface, and energy-harvesting applications.

FAQ

What is the maximum operating frequency of the MSP430F2131IRGER?

The MSP430F2131IRGER supports a maximum system clock (MCLK) frequency of 16 MHz when VCC ≥3.3 V, enabled by its factory-calibrated digitally controlled oscillator (DCO). At 2.7 V, the maximum is 12 MHz, and at 1.8 V, it is limited to 6 MHz per TI's recommended operating conditions. This scalability allows designers to balance performance and power across varying supply conditions.

Does the MSP430F2131IRGER include hardware debug support?

Yes, the MSP430F2131IRGER integrates an Embedded Emulation Module (EEM) supporting full JTAG-based debugging and programming. It is compatible with standard TI tools including MSP-FET430UIF (USB) and MSP-FET430PIF (parallel port), enabling breakpoints, register inspection, and flash memory verification without additional hardware.

How does the analog comparator in the MSP430F2131IRGER support slope A/D conversion?

The MSP430F2131IRGER's Comparator_A+ module drives Timer_A's capture input (e.g., CCI0B on P2.2) to record zero-crossing times of a linear ramp voltage. By measuring time between comparator transitions, the device computes input voltage resolution down to ~10-bit effective accuracy - eliminating external ADC components while maintaining ultra-low power.

What package type and thermal characteristics does the MSP430F2131IRGER use?

The MSP430F2131IRGER uses a 20-pin QFN (RGE) package: 4 mm × 4 mm, 0.5 mm pitch, with an exposed thermal pad. TI recommends connecting the pad directly to VSS for optimal thermal dissipation and electrical noise reduction - critical for stable analog performance in compact PCB layouts.

Can the MSP430F2131IRGER operate from a single 1.8 V supply?

Yes, the MSP430F2131IRGER is fully specified to operate from 1.8 V to 3.6 V. At 1.8 V, it supports up to 6 MHz MCLK, delivers 250 μA active current at 1 MHz, and maintains full peripheral functionality including Timer_A, Comparator_A+, and JTAG debugging - making it suitable for energy-harvesting and coin-cell applications.