Texas Instruments MSP430F1481IPMR

Overview

MSP430F1481IPMR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 48KB Flash, 2KB RAM, a 12-bit ADC with 8 channels, dual 16-bit timers (Timer_A3 and Timer_B7), two USARTs, and on-chip comparator. It operates from 1.8 V to 3.6 V and supports five power-saving modes, enabling battery-powered sensor systems and portable meters.

For engineers reviewing the MSP430F1481IPMR datasheet, MSP430F1481IPMR pinout, MSP430F1481IPMR application, or MSP430F1481IPMR equivalent, key selection criteria include its 64-pin LQFP package, 48 I/O pins, dual USART support for UART/SPI, 12-bit ADC with internal reference, and wake-up time under 6 µs from standby mode.

Technical Context

The MSP430F1481IPMR implements a 16-bit RISC CPU with constant generators for high code efficiency and integrates a digitally controlled oscillator (DCO) enabling sub-6-µs wake-up from LPM3. Its memory-mapped peripheral architecture includes dedicated registers for Timer_A (3 capture/compare registers), Timer_B (7 capture/compare registers with shadow registers), and ADC12 with autoscan and sample-and-hold.

It supports dual clock domains (ACLK, SMCLK, MCLK) driven by LFXT1 (32.768 kHz crystal), XT2 (up to 8 MHz), or DCO; analog subsystem includes AVCC/AVSS rails, internal/external reference selection (VREF+/VREF−), and 8-channel analog input via P6.0–P6.7. JTAG interface enables full emulation and programming without external voltage.

Key Specifications

Pinout & Package

LQFP-64 (10 mm × 10 mm) package with exposed thermal pad; 48 general-purpose I/O pins distributed across Ports P1–P6, plus dedicated analog inputs (P6.0–P6.7), clock inputs (XIN/XOUT, XT2IN/XT2OUT), and JTAG debug signals (TCK/TMS/TDI/TDO).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F149IPMR, the MSP430F1481IPMR offers optimal balance of code density and package compatibility for cost-sensitive, battery-operated designs; versus MSP430F1481IRTD, it provides proven manufacturability in standard LQFP assembly lines without thermal pad handling complexity.

Availability

MSP430F1481IPMR is available at Aetrix Electronics and suitable for smart metering, portable instrumentation, industrial control, and wireless sensor node applications requiring stable component supply and long-term production continuity.

Supply support for MSP430F1481IPMR 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 and reliability.

The MSP430F14x1 product line targets ultra-low-power embedded systems in metering, sensing, and portable instrumentation - designed to maximize battery life while integrating essential analog and digital peripherals on a single die.

FAQ

What is the maximum operating frequency of the MSP430F1481IPMR?

The MSP430F1481IPMR does not specify a maximum system clock frequency in its datasheet; instead, it guarantees correct operation up to 8 MHz using the XT2 oscillator or DCO-calibrated frequencies. The 16-bit RISC core achieves a 125-ns instruction cycle time, supporting effective throughput at up to 8 MIPS under typical conditions. All timing parameters in the MSP430F1481IPMR datasheet assume operation within this validated range.

Does the MSP430F1481IPMR support in-system programming without external hardware?

Yes, the MSP430F1481IPMR supports in-system programming via its built-in bootloader (BSL) using UART or SPI interfaces - no external programmer required. The BSL is activated through specific pin states or JTAG fuse settings, and it operates with only the device's native supply voltage (1.8–3.6 V). This capability enables field firmware updates and eliminates dependency on TI's MSP-FET tool for basic programming tasks involving the MSP430F1481IPMR.

How many analog input channels does the MSP430F1481IPMR ADC support?

The MSP430F1481IPMR integrates a 12-bit ADC (ADC12) with 8 configurable analog input channels, mapped directly to pins P6.0 through P6.7 (A0–A7). These inputs support both single-ended and differential acquisition modes, internal reference (2.5 V), external reference (VeREF+), and temperature sensor integration. All 8 channels are accessible simultaneously in autoscan mode, enabling rapid multiplexed sampling without CPU intervention - a key capability confirmed for the MSP430F1481IPMR in SLAS272H.

Is the MSP430F1481IPMR pin-compatible with other devices in the MSP430F14x family?

Yes, the MSP430F1481IPMR is pin-compatible with MSP430F147IPMR, MSP430F148IPMR, MSP430F149IPMR, and their '1' variants (e.g., MSP430F1471IPMR) in the 64-pin LQFP (PM) package. Signal mapping, power pin locations (DVCC/DVSS/AVCC/AVSS), JTAG interface, and peripheral pin assignments match exactly across these devices. This allows direct substitution in existing designs when upgrading Flash size or selecting alternate variants - verified in TI's SLAS272H device comparison tables.

What are the supported low-power modes of the MSP430F1481IPMR?

The MSP430F1481IPMR supports five low-power modes (LPM0–LPM4), each disabling specific clocks and peripherals to minimize current draw. LPM3 retains RAM and watchdog timer while stopping MCLK/SMCLK, drawing just 1.6 µA. LPM4 disables all clocks and retains only RAM, consuming only 0.1 µA. Wake-up from LPM3 to active mode occurs in less than 6 µs - a guaranteed specification for the MSP430F1481IPMR that enables responsive, energy-efficient sensor polling architectures.