Texas Instruments MSP430F5508IPTR

Overview

MSP430F5508IPTR from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller with integrated full-speed USB 2.0 PHY, 16 KB flash, 4 KB + 2 KB RAM, 10-bit ADC (6 external + 2 internal channels), two USCI modules (UART/IrDA/SPI/I²C), four 16-bit timers, RTC, hardware multiplier, and DMA - designed for battery-powered sensor systems and USB-connected data loggers.

For engineers reviewing the MSP430F5508IPTR datasheet, MSP430F5508IPTR pinout, MSP430F5508IPTR application, or MSP430F5508IPTR equivalent, key selection criteria include USB PHY integration, LPM4.5 shutdown current (0.18 µA), 48-pin LQFP package compatibility, and dual-USCI support for simultaneous UART + I²C or SPI interfaces in portable measurement systems.

Technical Context

The MSP430F5508IPTR implements a unified clock system with FLL stabilization, programmable LDO core regulation, and flexible port mapping-enabling dynamic reconfiguration of USCI functions on Port 4. Its USB subsystem includes integrated 3.3-V/1.8-V power rails, USB-PLL, and eight bidirectional endpoints.

It features three low-power modes optimized for real-time operation: LPM3 (1.9 µA @ 2.2 V with RTC active), LPM4 (1.1 µA @ 3 V), and LPM4.5 (0.18 µA @ 3 V), all supporting fast wake-up (<5 µs) from standby. The 10-bit ADC delivers 200 ksps sampling with window comparator functionality.

Key Specifications

Pinout & Package

The MSP430F5508IPTR is housed in a 48-pin LQFP (7 mm × 7 mm) package with exposed thermal pad recommended to be connected to VSS. Pin functions are configurable via port mapping controller, especially for USCI signals on Port 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F5509IPTR and MSP430F5510IPTR, the MSP430F5508IPTR delivers identical USB, timer, and low-power architecture in the smallest 48-pin LQFP footprint - making it the most cost-effective choice for resource-constrained USB sensor endpoints where 16 KB flash suffices.

Availability

MSP430F5508IPTR is available at Aetrix Electronics and suitable for USB-connected sensor nodes, portable data loggers, and low-power HID peripherals requiring stable component supply across multi-year production cycles.

Supply support for MSP430F5508IPTR 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 company specializing in analog and embedded processing technologies, with leadership in low-power microcontrollers and signal chain solutions.

The MSP430F5508IPTR belongs to the MSP430F5xx USB-capable microcontroller family, engineered for ultra-low-power sensing and USB device-class applications where energy efficiency, integration, and rapid time-to-market are critical.

FAQ

What USB device classes does the MSP430F5508IPTR natively support?

The MSP430F5508IPTR supports USB device classes including CDC ACM (virtual COM port), HID (keyboard/mouse/gamepad), and MSC (mass storage) through TI's USB stack. Its integrated USB-PLL and endpoint FIFOs enable reliable enumeration and data transfer at full speed (12 Mbps); no external PHY is needed. The MSP430F5508IPTR firmware must implement the chosen class descriptor and request handler per USB-IF specifications.

Does the MSP430F5508IPTR require external crystals for USB operation?

No - the MSP430F5508IPTR uses its internal USB-PLL locked to the 48-MHz reference derived from the DCO, eliminating need for a dedicated USB crystal. However, an external 32-kHz crystal on XIN/XOUT (P5.4/P5.5) is required for accurate RTC operation and low-power LPM3 timing; the internal VLO may be used for less precise wake-up clocks.

How many USCI modules does the MSP430F5508IPTR have, and what interfaces do they support?

The MSP430F5508IPTR integrates two USCI modules: USCI_A0 and USCI_A1 support UART, IrDA, and SPI; USCI_B0 and USCI_B1 support I²C and SPI. In the 48-pin LQFP package, USCI functions are routed exclusively through Port 4 (P4.0–P4.5) using the port mapping controller - limiting simultaneous use of all protocols but enabling flexible configuration per application.

What is the maximum ADC sampling rate and channel count supported by the MSP430F5508IPTR?

The MSP430F5508IPTR's ADC10_A module achieves up to 200 ksps with 6 external analog inputs (A0–A5) and 2 internal references (VeREF+, VeREF−). It includes a window comparator for autonomous high/low threshold detection, reducing CPU polling. Sampling rate depends on ADC clock source and conversion mode - typical throughput is 100 ksps in sequence mode with internal reference.

Can the MSP430F5508IPTR operate from a single 3.3-V supply, and how is core voltage regulated?

Yes - the MSP430F5508IPTR operates from a single 3.3-V supply applied to DVCC/DVSS and AVCC/AVSS. Its fully integrated LDO generates a programmable VCORE (1.8 V to 2.8 V) for the CPU and peripherals, enabling dynamic voltage scaling to optimize active-mode current versus performance. Core voltage is set via PMMCTL0 register and stabilized by internal feedback.