General Description

(2)Heads

The MR (Magnet - Resistive) of the CSS (contact start/stop) type heads are in contact with the disks when the disks are not rotating, and automatically float when the rotation is started.

(3)Spindle motor

The disks are rotated by a direct-drive hall-less DC spindle motor. The motor speed is controlled by a feedback circuit using the counter electromotive current to precisely maintain the specified speed.

(4)Actuator

The actuator, which uses a rotary voice coil motor (VCM), consumes little power and generates little heat. The heads at the end of the actuator arm are controlled and positioned via feedback of servo information in the data.

The heads are positioned on the CCS zone over the disks when the power is off or the spindle motor is stopped.

(5)Air circulation (recirculation filter, breather filter)

The disk enclosure (DE) configures a clean room to keep out particles and other contaminants. The DE has a closed-loop air recirculation system. Using the movement of the rotating disks, air is continuously cycled through a filter. This filter will trap any particles floating inside the enclosure and keep the air inside the DE contaminant free. To prevent negative pressure in the vicinity of the spindle when the disks begin rotating, a breather filter is attached. The breather filter also equalizes the internal air pressure with the atmospheric pressure due to surrounding temperature changes.

(6)Read/write circuit

The read/write circuit utilizes a read channel mounted with a head IC that supports high-speed transmission and an MEEPR4ML (Modified Enhanced Extended Partial Response Class 4 Maximum Likelihood) modulation/demodulation circuit in order to prevent errors being triggered by external noise and to improve data reliability.

(7)Controller circuit

The controller circuit uses LSIs to increase the reliability and uses a high speed microprocessing unit (MPU) to increase the performance of the FC controller.

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Fujitsu MAX3036FC, MAX3073FC, MAX3147FC manual General Description
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MAX3147FC, MAX3036FC, MAX3073FC specifications

The Fujitsu MAX3036FC, MAX3073FC, and MAX3147FC are advanced integrated circuits that cater to a variety of high-performance applications, predominantly in the realm of communications and data transmission. Each model comes laden with unique features that help in addressing specific requirements in modern electronic systems.

The MAX3036FC, for instance, stands out due to its robust signal processing capabilities. It is particularly optimized for high-speed data communications, making it an excellent choice for applications that demand minimal latency and high data integrity. This featured IC operates within a wide voltage range, ensuring versatility in different circuit environments. It also adopts technology enabling low power consumption, an essential attribute in battery-operated devices.

In contrast, the MAX3073FC brings a distinct set of features suitable for more specialized applications. Its architecture supports a comprehensive serial data communication framework, making it ideal for designs that utilize various communication protocols, including those in industrial automation and automotive systems. The MAX3073FC supports advanced error correction mechanisms which enhance reliability, ensuring more accurate data transmission even over longer distances.

The MAX3147FC, on the other hand, focuses on integrating advanced timing and synchronization technologies. This model is particularly significant in applications that require precise timing signals, such as in telecommunications infrastructure and high-frequency trading systems. The MAX3147FC features integrated oscillators and buffers, streamlining the design process and reducing component count. Additionally, it boasts immunity to electromagnetic interference, a critical factor in maintaining signal integrity in noisy environments.

Common to all three models is Fujitsu's commitment to use cutting-edge manufacturing processes. This ensures the devices are compact, enhancing their suitability for modern designs where space is constrained. The ICs are also designed to handle varying temperature ranges, making them resilient for use in diverse environments.

Each IC is supported by comprehensive documentation and development tools that aid engineers in the rapid prototyping and deployment of their designs. The integration of these advanced features and technologies not only simplifies the design process but also accelerates time-to-market for new products. Whether addressing the demands of communication systems, industrial controls, or consumer electronics, the MAX3036FC, MAX3073FC, and MAX3147FC from Fujitsu represent exceptional flexibility and performance in the landscape of integrated circuit technology.
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