Texas Instruments MSP430F5309IPTR

Overview

MSP430F5309IPTR from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller featuring 24 KB flash, 6 KB RAM, four 16-bit timers (TA0/TA1/TA2/TB0), dual USCI modules (UART/IrDA/SPI/I²C), 10-bit ADC with 8 external channels, RTC, hardware multiplier, and 31 GPIOs in a 48-pin LQFP package. It targets battery-powered sensor systems and digital timers requiring sub-2 µA standby current.

For engineers reviewing the MSP430F5309IPTR datasheet, MSP430F5309IPTR pinout, MSP430F5309IPTR application, or MSP430F5309IPTR equivalent, key selection criteria include LPM3 current (1.9 µA @ 2.2 V), 10-bit ADC resolution and channel count, dual USCI support for concurrent UART + I²C, RTC alarm capability, and LQFP-48 package compatibility with legacy MSP430F5xx layouts.

Technical Context

The MSP430F5309IPTR implements a 16-bit RISC CPU with constant generators and extended memory addressing, paired with a unified clock system (UCS) containing FLL, VLO, REFO, XT1 (32 kHz), and XT2 (up to 32 MHz). Its power management includes an integrated 3.3-V LDO, supply supervision, brownout reset, and five low-power modes (LPM0–LPM4.5).

Peripherals are mapped via port mapping controller on Port 4, enabling flexible USCI_A1/USCI_B1 signal routing. The device supports serial onboard programming without external voltage and features 3-channel DMA for efficient data movement between ADC, USCI, and memory-critical for real-time sensor fusion in portable applications.

Key Specifications

Pinout & Package

LQFP-48 package (7 mm × 7 mm), thermally enhanced with exposed pad recommended to be connected to DVSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F5309IPTR, the MSP430F5310IPTR offers +8 KB flash for larger firmware while maintaining identical low-power behavior and peripheral set; the MSP430F5308IPTR reduces flash by 8 KB but retains all timing, communication, and analog capabilities-making it ideal for streamlined, volume-sensitive deployments.

Availability

MSP430F5309IPTR is available at Aetrix Electronics and suitable for remote sensor nodes, digital thermostats, hand-held meters, and industrial timer modules requiring stable component supply and long-term industrial lifecycle support.

Supply support for MSP430F5309IPTR 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 for industrial, automotive, and consumer markets.

The MSP430F5309IPTR belongs to TI's ultra-low-power MCU product line, designed specifically for battery-operated measurement and control applications demanding nanowatt-level sleep currents and fast wake-up response.

FAQ

What is the maximum operating frequency of the MSP430F5309IPTR?

The MSP430F5309IPTR supports a maximum system clock frequency of 25 MHz, achieved via its integrated digitally controlled oscillator (DCO) with FLL stabilization. This allows high-speed instruction execution while maintaining ultra-low active-mode current (195 µA/MHz at 8 MHz, 3 V). The device also supports external crystal oscillators up to 32 MHz on XT2 for precision timing-critical applications.

Does the MSP430F5309IPTR support real-time clock functionality with calendar mode?

Yes, the MSP430F5309IPTR integrates a dedicated RTC_A module with calendar mode (year/month/day/hour/minute/second), alarm capability, and automatic leap-year correction. It operates from the 32-kHz XT1 crystal or internal REFO/VLO sources, retaining full functionality-including alarm interrupts-in LPM3 with only 1.9 µA current draw at 2.2 V.

How many analog input channels does the 10-bit ADC in the MSP430F5309IPTR support?

The MSP430F5309IPTR's ADC10_A module supports 8 external analog input channels (A0–A7) plus 2 internal references (VeREF+ and VeREF−), totaling 10 selectable inputs. Channel selection is software-controlled via ADC10MCTL0–ADC10MCTL7 registers, and the window comparator feature enables autonomous high/low threshold monitoring without CPU intervention.

Can the MSP430F5309IPTR operate from a single 1.8-V supply?

Yes, the MSP430F5309IPTR is fully specified for operation from 1.8 V to 3.6 V. Its integrated LDO regulates core voltage independently, and all peripherals-including flash programming, ADC, and USCI-function correctly at 1.8 V. Active-mode current scales linearly (115 µA/MHz at 3 V → ~70 µA/MHz at 1.8 V), preserving ultra-low-power integrity across the entire voltage range.

Is the MSP430F5309IPTR pin-compatible with other devices in the MSP430F53xx family?

Yes, the MSP430F5309IPTR in the 48-pin LQFP (PT) package shares identical pinout and signal mapping with MSP430F5310IPTR, MSP430F5308IPTR, and MSP430F5304IPTR. All four devices use the same mechanical footprint, power/ground assignments, and primary peripheral pin locations-enabling drop-in replacement within the same package variant for design reuse and firmware scalability.