Texas Instruments MSP430FG4618IZCA

Overview

MSP430FG4618IZCA from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller with 116KB+256B flash, 8KB RAM, integrated 12-bit ADC (12 channels), dual 12-bit DACs, three configurable op-amps, LCD driver (160 segments), two 16-bit timers (Timer_A3 and Timer_B7), USCI_A0 (UART/IrDA/SPI) and USCI_B0 (SPI/I²C), and 80 I/O pins in a 113-ball nFBGA package. It targets portable medical devices and electronic metering systems requiring long battery life and analog signal conditioning.

For engineers reviewing the MSP430FG4618IZCA datasheet, MSP430FG4618IZCA pinout, MSP430FG4618IZCA application, or MSP430FG4618IZCA equivalent, key selection considerations include its 8KB RAM capacity, dual 12-bit DAC synchronization, regulated LCD charge pump, 113-ball ZCA package footprint, and support for real-time clock via Basic Timer with RTC feature.

Technical Context

The MSP430FG4618IZCA implements a 16-bit RISC CPU with constant generators and a digitally controlled oscillator (DCO), enabling sub-6 µs wake-up from LPM3 standby mode. Its memory-mapped peripherals include DMA-controlled ADC sampling, synchronized dual DAC outputs with voltage reference control (VREF+/VeREF−), and independent op-amp configurations supporting noninverting/inverting modes with external feedback networks.

It integrates two universal serial interfaces: USCI_A0 supports UART (with auto-baud detection), IrDA, and SPI; USCI_B0 supports SPI and I²C. The device uses separate analog (AVCC/AVSS) and digital (DVCC/DVSS) supply domains, with dedicated SVS/SVM circuitry for programmable brownout detection and supply monitoring at the core and I/O levels.

Key Specifications

Pinout & Package

Package: 113-ball nFBGA (ZCA), 7 mm × 7 mm, 0.5 mm pitch. Ball assignments follow TI's standard ZCA mapping with DVSS1 (ball B3) as primary ground return path. All unassigned balls must be tied to ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FG4618IZCA, the FG4619IZCA trades 4KB RAM for +4KB flash-ideal for feature-rich firmware with minimal runtime data; the FG4617IZCA retains full 8KB RAM but reduces flash by 24KB, better suited for deterministic real-time tasks with compact code.

Availability

MSP430FG4618IZCA is available at Aetrix Electronics and suitable for portable medical monitors, smart electricity meters, handheld gas analyzers, and industrial flow sensor terminals requiring stable component supply across extended production lifecycles.

Supply support for MSP430FG4618IZCA 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 technologies for industrial, automotive, and personal electronics markets.

The MSP430FG461x series is designed for ultra-low-power portable measurement applications-emphasizing extended battery life, integrated analog signal chains, and LCD-driven human interfaces in space-constrained devices.

FAQ

What is the maximum operating frequency of the MSP430FG4618IZCA?

The MSP430FG4618IZCA operates with a digitally controlled oscillator (DCO) that supports up to 8 MHz system clock (MCLK). Its 16-bit RISC architecture delivers a 125-ns instruction cycle time at this frequency. Actual sustained performance depends on supply voltage and temperature; at 2.2 V, typical active-mode current is 400 µA at 1 MHz, confirming robust operation across the 1–8 MHz range under specified conditions. The MSP430FG4618IZCA does not require external crystals for basic operation but supports XT1 (LF) and XT2 (HF) oscillators for precision timing.

Does the MSP430FG4618IZCA support real-time clock (RTC) functionality?

Yes, the MSP430FG4618IZCA includes a Basic Timer module with real-time clock (RTC) capability. This timer can operate from the ACLK source (e.g., 32.768 kHz watch crystal or VLO) and supports calendar functions including seconds, minutes, hours, days, months, and years when configured with appropriate software routines. Unlike dedicated RTC peripherals, it relies on firmware-based interrupt handling and register management-but provides full RTC functionality without requiring external RTC ICs. The MSP430FG4618IZCA's RTC implementation is validated in TI's MSP430x4xx Family User's Guide.

How many LCD segments can the MSP430FG4618IZCA drive, and what voltage support does it provide?

The MSP430FG4618IZCA drives up to 160 LCD segments using its integrated LCD_A module. It supports static, 2-mux, 3-mux, and 4-mux configurations. The device includes a regulated charge pump that generates internal LCD bias voltages (VLCD) from the DVCC supply, eliminating the need for external voltage sources. When LCDCPEN = 1, the charge pump delivers up to 3.5 V (typical) for VLCD, adjustable via VLCDx bits. External LCD voltage can also be applied via LCDCAP if LCDCPEN = 0 and VLCDEXT = 0, giving design flexibility. All LCD functions are fully supported on the MSP430FG4618IZCA in its 113-ball ZCA package.

What communication interfaces are available on the MSP430FG4618IZCA?

The MSP430FG4618IZCA integrates two universal serial communication interfaces: USCI_A0 and USCI_B0. USCI_A0 supports asynchronous UART (with automatic baud-rate detection and IrDA encoding/decoding) and synchronous SPI. USCI_B0 supports synchronous SPI and I²C master/slave modes. Additionally, USART1 (a legacy module) provides UART and SPI functionality on dedicated pins (UTXD1/URXD1/UCLK1). These interfaces are electrically isolated per module and can operate concurrently-for example, USCI_B0 handling I²C sensor reads while USCI_A0 manages UART telemetry transmission. All are fully functional on the MSP430FG4618IZCA.

Is the MSP430FG4618IZCA pin-compatible with other members of the MSP430FG461x family?

Yes, the MSP430FG4618IZCA is pin-compatible with other ZCA-package variants in the MSP430FG461x family-including MSP430FG4619IZCA, MSP430FG4617IZCA, and MSP430FG4616IZCA-as confirmed by TI's SLAS508K datasheet Section 4.2 and Table 4-1. All share identical 113-ball nFBGA (ZCA) mechanical footprint, ball assignment, and I/O function mapping. Differences are limited to flash/ROM size and RAM capacity; no PCB redesign is required when migrating between these parts. This compatibility extends to the MSP430CG461x ROM-based variants in the same package, though firmware loading methods differ due to absence of flash.