IC LAN ETHERNET CTLR 3V 100LQFP

CS8900A-CQ3Z – 3V Ethernet Controller IC – Cirrus Logic

The CS8900A-CQ3Z from Cirrus Logic is an integrated Ethernet controller IC designed for embedded networking applications. This obsolete but still-available component delivers reliable 10 Base-T connectivity with low power consumption, making it ideal for legacy system support. PCX maintains limited stock of this specialized IC, ensuring fast shipping and dedicated technical support for your legacy integration needs.

Key Features

• Protocol: Ethernet 10 Base-T PHY compliance
• Interface: Industry Standard Architecture (ISA) bus
• Voltage Range: Dual supply support (3V or 5V operation)
• Power Efficiency: Low 95mA operating current
• Package: 100-LQFP (14x14mm) compact footprint

Technical Specifications

This Ethernet controller IC features a robust 100-LQFP package with industrial temperature tolerance (0°C to 70°C). The CS8900A-CQ3Z provides full controller functionality with ISA interface compatibility, enabling seamless integration into legacy embedded systems. Its dual-voltage design (3V/5V) offers deployment flexibility across various architectures.

Typical Applications

• Legacy industrial control systems
• Retrofit networking for embedded devices
• Medical equipment communication modules
• Vintage computing restoration projects
• Test and measurement instrumentation

About Cirrus Logic

Cirrus Logic is a globally recognized leader in high-precision analog and digital signal processing components. With over 35 years of industry innovation, the company specializes in developing energy-efficient integrated circuits for audio, industrial, and embedded applications. Their commitment to quality and technical excellence has established Cirrus Logic as a trusted partner for mission-critical designs.

Cirrus Logic maintains rigorous manufacturing standards and comprehensive lifecycle support, ensuring component reliability even for legacy systems. Their extensive IP portfolio and system-level expertise enable optimized solutions for complex interface challenges across multiple industries.

About Ethernet Controller ICs

Ethernet controller ICs manage network communication between devices and local area networks (LANs), handling data packet processing, protocol management, and physical layer interfacing. These components serve as the critical bridge between host processors and Ethernet connections, enabling reliable wired data transmission in embedded systems.

For legacy industrial equipment and specialized devices, dedicated controllers like the CS8900A-CQ3Z provide essential networking capabilities without requiring full system redesigns. Their hardware-level implementation offers deterministic performance advantages over software-based solutions, particularly in real-time control environments where communication latency is critical.

Packaging Information

Available in protective tray packaging to ensure damage-free transit. Contact PCX sales team for reel packaging options or custom quantities.

Frequently Asked Questions

Question: Is this IC still suitable for new designs?
Answer: While obsolete for new designs, it remains ideal for legacy system maintenance, repairs, and lifecycle extensions.

Question: Does PCX provide technical documentation?
Answer: Yes, access the full datasheet here: Download Datasheet

Question: What’s the lead time for this obsolete part?
Answer: PCX ships in-stock items within 24 hours – contact us for real-time availability confirmation.

Question: Can this controller support modern Ethernet standards?
Answer: It exclusively supports 10 Base-T (10Mbps) Ethernet per IEEE 802.3 specifications.

Question: Is the 3V/5V operation mode auto-selecting?
Answer: Voltage selection requires proper circuit configuration – refer to section 4.2 in the datasheet.

Question: How does PCX ensure genuine Cirrus Logic components?
Answer: We source exclusively through manufacturer-authorized channels with full traceability.

Product images are representational – verify specifications using the provided datasheet.

Secure Your Legacy Networking Solution Now!

Limited stock available – order the CS8900A-CQ3Z today for guaranteed delivery and dedicated technical support from PCX!