Texas Instruments MSP430A139IPZR

Overview

MSP430A139IPZR from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller featuring 120KB flash, 4KB RAM, 12-bit ADC with 12 channels, dual 12-bit DACs, three configurable op-amps, and integrated 160-segment LCD driver - designed for portable medical and energy metering applications requiring extended battery life and analog signal conditioning.

For engineers reviewing the MSP430A139IPZR datasheet, MSP430A139IPZR pinout, MSP430A139IPZR application, or MSP430A139IPZR equivalent, key selection criteria include its 100-pin LQFP package, 1.8–3.6 V supply range, <6 µs wake-up from LPM3, and hardware support for UART/I²C/SPI via two USCI modules.

Technical Context

The MSP430A139IPZR implements the MSP430xG461x architecture with CPUX core, FLL+ clock system, and dual 16-bit timers (Timer_A3 and Timer_B7) enabling precise timing control for sensor sampling and display refresh. Its on-chip DMA controller supports three channels for autonomous data movement between peripherals and memory without CPU intervention.

It integrates analog subsystems including a 12-bit ADC with internal reference and autoscan, dual synchronized 12-bit DACs with voltage outputs, and three rail-to-rail op-amps configurable as amplifiers, comparators, or filters - all operating from a single low-voltage supply.

Key Specifications

Pinout & Package

The MSP430A139IPZR is housed in a 100-pin LQFP (PZ) package measuring 14 mm × 14 mm, with 80 general-purpose I/O pins, dedicated analog inputs (A0–A15), and peripheral-specific signals including USCI_A0/USCI_B0, USART1, Timer_A/B, ADC12, DAC12, and LCD segment/backplane outputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430A139IPZR, the FG4619 variant adds in-system programmability for firmware updates, while the CG4619 variant trades flash for ROM to reduce unit cost - both retain identical analog performance, LCD drive, and low-power behavior in the same 100-pin LQFP package.

Availability

MSP430A139IPZR is available at Aetrix Electronics and suitable for portable medical devices, smart energy meters, and industrial sensor nodes requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MSP430A139IPZR 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 50 years of innovation in low-power design.

The MSP430xG461x product line was engineered for ultra-low-power mixed-signal applications demanding integrated analog peripherals, LCD support, and decade-long battery operation - targeting metering, medical, and sensing markets.

FAQ

What is the maximum operating frequency of the MSP430A139IPZR?

The MSP430A139IPZR operates up to 8 MHz using the internal DCO with FLL+ stabilization. Its 16-bit RISC CPU achieves a 125 ns instruction cycle time at this frequency, enabling responsive real-time control while maintaining ultra-low power consumption in active mode (400 µA at 1 MHz, 2.2 V). The device supports multiple clock sources including LFXT1 (32 kHz watch crystal) and XT2 (up to 8 MHz standard crystal).

Does the MSP430A139IPZR support I²C communication?

Yes, the MSP430A139IPZR supports I²C communication through USCI_B0 module, which is configurable for I²C master or slave operation. The USCI_B0 module provides dedicated SCL and SDA pins (P3.2 and P3.1 respectively) with automatic clock stretching, arbitration, and 7-bit/10-bit addressing. This enables direct interfacing with I²C sensors, EEPROMs, or display controllers without external level-shifting circuitry.

How many LCD segments can the MSP430A139IPZR drive, and what voltage support does it provide?

The MSP430A139IPZR drives up to 160 LCD segments using its integrated LCD_A module with regulated charge pump. It supports static, 2-, 3-, or 4-mux configurations and provides internal voltage generation (VLCD) adjustable from 2.6 V to 3.3 V. The LCDCAP pin connects to an external capacitor to stabilize the charge pump output, eliminating need for external bias supplies while maintaining consistent contrast across the full 1.8–3.6 V operating voltage range.

What are the key differences between MSP430A139IPZR and MSP430FG4619IPZR?

The MSP430A139IPZR and MSP430FG4619IPZR share identical silicon die, pinout, peripherals, and electrical specifications. The "A139" designation reflects Texas Instruments' internal part numbering convention for the FG4619 family in 100-pin LQFP packaging. Both parts offer 120 KB flash, 4 KB RAM, dual 12-bit DACs, and full USCI support - making them functionally interchangeable in design and procurement.

Is the MSP430A139IPZR qualified for industrial temperature range operation?

Yes, the MSP430A139IPZR is rated for operation across the industrial temperature range of –40°C to +85°C. Its specifications - including supply current, ADC accuracy, DAC linearity, and oscillator stability - are guaranteed over this full range per the SLAS508K datasheet. Thermal characteristics such as θ_JA = 46.5°C/W (LQFP package) ensure reliable thermal performance in enclosed industrial enclosures without forced airflow.