Integrated chipsets for automotive CD systems

Toshiba Electronics has introduced two surface-mount chipsets that greatly simplify the task of designing compact disc (CD) modules for vehicle audio applications.

Toshiba Electronics has introduced two surface-mount chipsets that greatly simplify the task of designing compact disc (CD) modules for vehicle audio applications The ICs enable the designer to easily create CD players offering a wide range of features, yet requiring no adjustment or maintenance

Developed to provide a high level of design flexibility, the new CD player chip sets are capable of supporting the most popular three-beam pick-up head (PUH) models from eight leading manufacturers.

In comparison, many other suppliers' chipsets are often dedicated to specific PUHs.

For a standard CD player requiring low component count, Toshiba offers the TC9457 chipset.

The TC9457F itself includes an adjustment-free digital servo DSP and a built-in CMOS 4bit microcontroller with I/Os available for LCD/LED driving and key scanning.

The TC9457 comes with the TA2153, a bipolar RF amplifier, and the TA2125 bipolar five-channel motor driver IC.

Incorporating all of the firmware and circuitry required for standard CD player functionality, the TC9457 minimises the need for additional software development.

The device operates from a supply voltage of 5V and is housed in a 100-pin QFP.

High-end systems with advanced features can be created using the new TC94A14 chipset, which comprises the TC94A14 CMOS digital servo single-chip processor, the TA2157 RF amplifier and the TA2125 bipolar five-channel motor driver IC.

Offering the designer the freedom to choose the external microcontroller unit best suited to the requirements of the system, the TC94A14 provides key functionality such as built-in RAM, a built-in anti-defect and anti shock circuit, an automatic adjustment function for focus and tracking, an EFM decoder, error correction and a microcontroller interface.

A new digital equaliser algorithm allows an improved playability compared to older systems.

This device offers 3.3V operation and is supplied in a 64-pin QFP.
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