Texas Instruments MSP430F46181IPZR

Overview

MSP430F46181IPZR from Texas Instruments is an ultralow-power 16-bit mixed-signal microcontroller featuring 116KB+256B flash/ROM, 8KB RAM, integrated LCD driver (up to 160 segments), dual 16-bit timers (Timer_A3 and Timer_B7), USCI_A0 (UART/IrDA/SPI), USCI_B0 (SPI/I²C), USART1 (UART/SPI), DMA controller (3 channels), comparator, and real-time clock capability. It targets portable medical devices and e-metering applications requiring extended battery life.

For engineers reviewing the MSP430F46181IPZR datasheet, MSP430F46181IPZR pinout, MSP430F46181IPZR application, or MSP430F46181IPZR equivalent, key selection criteria include its 100-pin TQFP package, absence of ADC12 module (vs. non-"1" variants), LCD charge-pump support, and supply voltage range of 1.8 V to 3.6 V with sub-µA standby current.

Technical Context

The MSP430F46181IPZR implements the MSP430x461x1 family architecture-optimized for ultralow-power operation with five power-saving modes, wake-up from standby in <6 µs, and a digitally controlled oscillator (DCO). Its CPUX core includes 16 general-purpose registers and constant generators for high code efficiency.

This device omits the 12-bit ADC12 module present in non-"1" variants (e.g., MSP430F4618IPZR), confirmed by TI's functional block diagram and terminal function tables. All other peripherals-including USCI_A0, USCI_B0, USART1, LCD_A, Timer_A3, Timer_B7, DMA, comparator, and basic timer with RTC-are retained and fully functional.

Key Specifications

Pinout & Package

Package: 100-pin TQFP (PZ), 14 mm × 14 mm, 0.5 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F4618IPZR, the MSP430F46181IPZR removes ADC12 to reduce die size and cost while retaining full LCD, RTC, and communication capabilities; versus MSP430F5438AIPZR, it trades flash/RAM headroom for on-chip LCD support and lower system-level BOM count.

Availability

MSP430F46181IPZR is available at Aetrix Electronics and suitable for portable medical devices, smart electricity meters, and industrial sensor nodes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for MSP430F46181IPZR 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 digital signal processing technologies, with over 90 years of innovation in power-efficient electronics.

The MSP430x461x1 series was designed specifically for ultralow-power, LCD-equipped metering and portable instrumentation applications-emphasizing extended battery life, integrated human-interface support, and robust industrial timing.

FAQ

Does the MSP430F46181IPZR include a 12-bit analog-to-digital converter (ADC)?

No, the MSP430F46181IPZR explicitly excludes the ADC12 module, as confirmed in TI's SLAS675 datasheet footnote ("The MSP430F461x1 devices are identical to the MSP430F461x devices, with the exception that the ADC12 module is not implemented"). This distinguishes it from the MSP430F4618IPZR, which includes the full 12-channel ADC12. The MSP430F46181IPZR retains all other peripherals including USCI, LCD, timers, and DMA.

What is the maximum LCD segment count supported by the MSP430F46181IPZR?

The MSP430F46181IPZR supports up to 160 LCD segments using its integrated LCD_A module with 1/2–1/4 bias and built-in regulated charge pump. This is achieved via four COM lines (COM0–COM3) and up to 40 SEG lines (S0–S39), with pin multiplexing allowing flexible segment mapping. The charge pump eliminates need for external voltage generation.

Which communication interfaces are available on the MSP430F46181IPZR?

The MSP430F46181IPZR provides three independent serial interfaces: USCI_A0 (configurable as UART, IrDA, or SPI), USCI_B0 (configurable as SPI or I²C), and USART1 (configurable as UART or SPI). These support simultaneous use-for example, I²C to a sensor, UART to a display, and IrDA for field service-without software arbitration overhead.

What package type and pin count does the MSP430F46181IPZR use?

The MSP430F46181IPZR uses a 100-pin plastic TQFP (PZ) package measuring 14 mm × 14 mm with 0.5 mm pitch. This package is listed in TI's official ordering table and matches the pinout documented for the MSP430x461x1IPZ variant, including dedicated LCD, timer, USCI, and JTAG signals across all 100 pins.

How does the power management of the MSP430F46181IPZR support battery-operated applications?

The MSP430F46181IPZR supports five low-power modes with sub-µA quiescent current: LPM3 (1.3 µA standby with ACLK active) and LPM4 (0.22 µA with RAM retention). Wake-up from LPM3 to active mode occurs in under 6 µs via multiple sources (GPIO, timer, USCI), enabling rapid response to events while maximizing battery longevity in portable and metering applications.