Texas Instruments MSP430F1121AIDGV

Overview

MSP430F1121AIDGV from Texas Instruments is an ultralow-power 16-bit RISC mixed-signal microcontroller featuring 4KB flash memory, 256B RAM, a 16-bit Timer_A with three capture/compare registers, an on-chip analog comparator, and 14 programmable I/O pins. It operates from 1.8 V to 3.6 V and supports wake-up from standby mode in under 6 μs - ideal for battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430F1121AIDGV datasheet, MSP430F1121AIDGV pinout, MSP430F1121AIDGV application, or MSP430F1121AIDGV equivalent, key selection criteria include its 20-pin TVSOP (DGV) package, flash-based in-system programmability, integrated slope A/D capability via comparator, and verified LPM4 current of 0.1 μA at 2.2 V/25°C.

Technical Context

The MSP430F1121AIDGV implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations and high code efficiency. Its basic clock module integrates a digitally controlled oscillator (DCO), 32-kHz crystal support, and selectable internal resistors - all optimized for sub-6 μs active-mode wake-up from LPM3/LPM4.

Peripheral integration includes Timer_A3 (16-bit, 3 CC registers), Comparator_A for analog signal comparison or slope ADC, and dual 8-bit I/O ports (P1: 8 pins; P2: 6 pins). All I/O pins support individually configurable interrupt edge detection, and the device supports JTAG debugging and UART-based BSL programming via P1.1/TX and P2.2/RX.

Key Specifications

Pinout & Package

Package: 20-pin Thin Very Small Outline Package (TVSOP), suffix DGV, body width 4.4 mm, lead pitch 0.65 mm - suitable for compact PCB layouts with hand-soldering compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F1101AIDGV, the MSP430F1121AIDGV doubles flash and RAM while retaining identical power profile and pinout; versus MSP430F1132IDGV, it trades integrated ADC for lower cost and proven comparator-based slope A/D - making it optimal for cost-sensitive, ultra-low-power designs where analog front-end simplicity is prioritized.

Availability

MSP430F1121AIDGV is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, and smart utility meters requiring stable component supply across long-lifecycle industrial programs.

Supply support for MSP430F1121AIDGV 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 MSP430x11x1(A) product line was engineered specifically for ultralow-power portable measurement and battery-operated sensing applications - emphasizing rapid wake-up, minimal active/standby current, and integrated analog peripherals to reduce BOM count.

FAQ

What is the maximum operating frequency of the MSP430F1121AIDGV at 3.6 V?

The MSP430F1121AIDGV supports a maximum system clock (MCLK) frequency of 8 MHz at 3.6 V, as specified in the recommended operating conditions. This limit applies when executing code from flash memory and ensures stable operation across the full −40°C to 85°C temperature range. The device's 125 ns instruction cycle time corresponds to this 8 MHz clock rate.

Does the MSP430F1121AIDGV support in-system programming without external hardware?

Yes, the MSP430F1121AIDGV supports in-system programming via its built-in bootstrap loader (BSL), which uses UART communication on P1.1 (TX) and P2.2 (RX). No external programming voltage or dedicated debugger is required - only a standard UART interface and user-defined password protection for secure firmware updates.

What are the key differences between the MSP430F1121AIDGV and MSP430C1121IDGV?

The MSP430F1121AIDGV features 4KB flash memory and 256B RAM, while the MSP430C1121IDGV uses 4KB ROM and 256B RAM. Flash enables field reprogramming and secure code updates; ROM is mask-programmed at manufacture and immutable. Both share identical peripherals, pinout, and low-power characteristics - but only the F-version supports BSL and JTAG-based development.

Can the MSP430F1121AIDGV operate from a single 1.5 V alkaline cell?

No - the MSP430F1121AIDGV requires a minimum supply voltage of 1.8 V per its recommended operating conditions. A single 1.5 V alkaline cell falls below this threshold; operation would violate specifications and likely result in unstable behavior or failure to initialize. Use a boost converter or two-cell configuration (3.0 V nominal) for reliable function.

Which low-power mode provides the lowest current draw while retaining RAM contents?

LPM4 (Low-Power Mode 4) delivers the lowest current draw with RAM retention: 0.1 μA typical at 2.2 V and 25°C. In LPM4, all clocks (ACLK, SMCLK, MCLK) are disabled, the DCO and crystal oscillator are halted, and only the RAM and register contents are preserved - making it ideal for long-duration sleep states in energy-constrained applications.