Texas Instruments MSP430F4491IPZR

Overview

MSP430F4491IPZR from Texas Instruments is an ultralow-power 16-bit mixed-signal microcontroller featuring 60KB+256B flash memory, 2KB RAM, integrated 160-segment LCD driver, dual USARTs, and seven-channel Timer_B with shadow registers. It operates from 1.8 V to 3.6 V and supports battery-powered portable instrumentation requiring precise analog capture and low-energy display control.

For engineers reviewing the MSP430F4491IPZR datasheet, MSP430F4491IPZR pinout, MSP430F4491IPZR application, or MSP430F4491IPZR equivalent, key selection criteria include its 100-pin QFP package, absence of ADC12 module (per F44x1 family designation), dual serial interface capability, and LCD segment drive architecture optimized for metering and sensor display systems.

Technical Context

The MSP430F4491IPZR implements a 16-bit RISC CPU with constant generators and a digitally controlled oscillator (DCO), enabling wake-up from standby mode in under 6 µs. Its peripheral set includes two 16-bit timers (Timer_A with three capture/compare registers; Timer_B with seven capture/compare registers and shadow registers), hardware multiplier, and comparator.

This device belongs to the MSP430x44x1 family variant, which excludes the ADC12 module present in non-"1" counterparts (e.g., MSP430F449). It supports up to 160 LCD segments via four common outputs (COM0–COM3) and 40 segment outputs (S0–S39), with dedicated analog LCD voltage inputs (R03, R13, R23, R33) for bias generation.

Key Specifications

Pinout & Package

Package: 100-pin plastic quad flat pack (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 MSP430F449IPZ, the MSP430F4491IPZR removes ADC12 to reduce cost and power, while retaining identical LCD, timer, and communication capabilities; versus MSP430F4481IPZ, it adds 12KB flash and hardware multiplier for larger firmware and computational workloads.

Availability

MSP430F4491IPZR is available at Aetrix Electronics and suitable for smart metering, portable medical devices, and industrial panel displays requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MSP430F4491IPZR 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 across industrial, automotive, and consumer markets.

The MSP430x44x1 product line targets ultralow-power portable instrumentation and display-centric applications, emphasizing extended battery life, integrated LCD control, and robust serial interfacing without compromising computational capability.

FAQ

Does the MSP430F4491IPZR include an integrated analog-to-digital converter?

No, the MSP430F4491IPZR does not include the ADC12 module. As indicated by the "x44x1" family designation, this variant omits the 12-bit ADC present in non-"1" counterparts like MSP430F449. The device retains all other peripherals-including dual USARTs, Timer_B with seven capture/compare registers, and 160-segment LCD driver-making it ideal for display- and communication-focused applications where external ADCs are used.

What is the maximum LCD segment count supported by the MSP430F4491IPZR?

The MSP430F4491IPZR supports up to 160 LCD segments using its integrated driver. This is achieved through four common outputs (COM0–COM3) and 40 segment outputs (S0–S39), configured for 1:1 to 1:4 multiplexing. The device also provides dedicated analog inputs (R03, R13, R23, R33) to generate internal LCD bias voltages, eliminating the need for external resistor networks or bias ICs in most implementations.

Is the MSP430F4491IPZR pin-compatible with other devices in the MSP430x44x family?

Yes, the MSP430F4491IPZR is pin-compatible with other 100-pin PZ-package devices in the MSP430x44x and MSP430x44x1 families, including MSP430F447IPZ, MSP430F448IPZ, MSP430F449IPZ, MSP430F4481IPZ, and MSP430F4491IPZ. Pin assignments for power, JTAG, timers, USARTs, LCD, and general-purpose I/O are identical across these variants, enabling hardware reuse when migrating between ADC-included and ADC-excluded versions.

What development tools are recommended for the MSP430F4491IPZR?

Texas Instruments recommends the MSP-FET430UIF (USB-based debugger), MSP-TS430PZ100 (target socket board for PZ package), and MSP-GANG430 (production programmer) for the MSP430F4491IPZR. All MSP430 devices include an Embedded Emulation Module (EEM), enabling full-speed debugging, flash programming, and real-time trace via standard JTAG signals (TCK, TMS, TDI/TCLK, TDO/TDI) on the 100-pin PZ package.

What are the key power management features of the MSP430F4491IPZR?

The MSP430F4491IPZR offers five low-power modes: Active (280 µA @ 1 MHz/2.2 V), LPM0–LPM3 (0.7–1.1 µA), and LPM4 (0.1 µA RAM retention). Wake-up from standby (LPM3/LPM4) occurs in under 6 µs via multiple sources-including port interrupts, timer events, and USART activity-enabling responsive yet energy-efficient operation in battery-powered applications such as handheld meters and environmental sensors.