Texas Instruments MSP430F1481IPM

Overview

MSP430F1481IPM from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 48KB flash, 2KB RAM, dual USARTs, a 12-bit ADC with 8 channels and internal reference, two 16-bit timers (Timer_A3 and Timer_B7), and hardware multiplier. It operates from 1.8 V to 3.6 V and supports five power-saving modes - ideal for battery-powered sensor systems and portable measurement devices.

For engineers reviewing the MSP430F1481IPM datasheet, MSP430F1481IPM pinout, MSP430F1481IPM application, or MSP430F1481IPM equivalent, key selection considerations include its LQFP-64 package, dual UART/SPI capability, 48 I/O pins with interrupt support, wake-up time under 6 µs from standby, and integrated analog peripherals enabling compact, low-power embedded control designs.

Technical Context

The MSP430F1481IPM implements a 16-bit CPU with constant generators and 125-ns instruction cycle time, paired with a digitally controlled oscillator (DCO) that enables sub-6-µs wake-up from LPM3. Its memory-mapped peripheral architecture includes dedicated registers for ADC12, Timer_B7 (with seven capture/compare registers and shadow registers), and Timer_A3 (three capture/compare registers).

It integrates two full-duplex USART modules supporting asynchronous UART and synchronous SPI operation, plus an on-chip comparator, hardware multiplier (MPY/MPYS/MAC/MACS), and JTAG-based debugging. The device uses separate analog (AVCC/AVSS) and digital (DVCC/DVSS) supply domains to minimize noise coupling in mixed-signal applications.

Key Specifications

Pinout & Package

LQFP-64 package (10 mm × 10 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad connected to DVSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F149IPM, the MSP430F1481IPM offers 12KB less flash but identical RAM, timers, ADC, and communication peripherals - making it optimal for cost-sensitive, mature designs. Against MSP430F1481IRTD, it trades package size and thermal characteristics for easier hand-soldering and legacy board compatibility.

Availability

MSP430F1481IPM is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical instruments, and smart energy meters requiring stable component supply and long-term manufacturability.

Supply support for MSP430F1481IPM 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 control in battery-operated measurement and monitoring systems - designed to maximize operational lifetime while integrating essential analog and digital peripherals on a single chip.

FAQ

What is the maximum operating frequency of the MSP430F1481IPM?

The MSP430F1481IPM does not have a fixed maximum clock frequency specification; instead, it relies on its digitally controlled oscillator (DCO) calibrated to operate up to approximately 8 MHz under typical conditions. Actual achievable frequency depends on supply voltage, temperature, and DCO tuning - with guaranteed timing compliance across the 1.8 V–3.6 V range and –40°C to +85°C ambient.

Does the MSP430F1481IPM support USB or CAN interfaces?

No, the MSP430F1481IPM does not integrate native USB or CAN physical layer or protocol controllers. It provides two USART modules configurable only as UART or SPI. External transceivers (e.g., SN65HVD230 for CAN or TUSB3410 for USB) must be used with appropriate firmware drivers to implement those protocols.

How many analog input channels does the MSP430F1481IPM ADC support?

The MSP430F1481IPM integrates a 12-bit ADC12 module supporting eight analog input channels (A0–A7), accessible via P6.0 through P6.7. These pins are multiplexed with general-purpose I/O and can be configured as analog inputs with programmable sample-and-hold timing and internal reference selection.

Is the MSP430F1481IPM pin-compatible with the MSP430F148IPM?

Yes, the MSP430F1481IPM is pin-compatible with the MSP430F148IPM. Both use the same LQFP-64 package, share identical pin functions and electrical characteristics, and differ only in flash memory content - the "1" suffix denotes factory-programmed bootloader (BSL) presence, not hardware revision.

What debug interface does the MSP430F1481IPM use?

The MSP430F1481IPM uses the standard 4-wire JTAG interface (TCK, TMS, TDI/TCLK, TDO/TDI) for debugging, programming, and boundary scan. It supports full-speed emulation, flash erase/write, and real-time register inspection via TI's MSP-FET or compatible JTAG adapters.