CS8900A-CQ3ZR

Controllers Overview

The CS8900A-CQ3ZR is a Crystal LAN ISA Ethernet controller manufactured by Cirrus Logic. It integrates MAC and PHY functions for 10BASE-T networks, supporting IEEE 802.3 standards with 10 Mbps data rates. The device operates on a 3.3V supply voltage and utilizes a 100-pin TQFP package. It features an internal 4KB RAM buffer and supports I/O, Memory, and DMA bus modes. The component is rated for commercial temperature ranges (0°C to 70°C) and includes RoHS compliance indicated by the 'Z' suffix.

Controllers Feature Summary

• Integrates MAC and PHY layers for direct connection to twisted-pair cabling
• Supports automatic polarity detection and correction for simplified wiring
• Provides PacketPage architecture for efficient memory access patterns
• Includes hardware CRC calculation for transmission integrity

Controllers Applications

• Embedded industrial control systems requiring network connectivity
• ISA-bus based embedded computers and single-board controllers
• Network interface modules for legacy microcontroller architectures

Controllers Procurement Notes

Verify RoHS compliance status through official manufacturer documentation or authorized distributors. Confirm the specific suffix 'Z' indicates lead-free packaging as per industry standards. Check for obsolete status notifications from Cirrus Logic regarding production availability and lifecycle management.

Controllers Selection Notes

Select this variant specifically for 3.3V logic level compatibility in low-power designs. Ensure the host system supports ISA bus timing or compatible parallel interfaces. Compare against newer integrated solutions if space constraints require smaller packages than the 100-pin TQFP form factor.

Controllers Part Context

This part belongs to the CS8900A Crystal LAN series designed for cost-effective embedded networking. It replaces discrete MAC/PHY combinations by consolidating functionality into a single chip. The CQ3ZR designation specifies the commercial temperature grade, 3.3V operation, and environmental compliance relative to other variants like the IQ3 series.

Controllers Replacement Considerations

Publicly confirmed substitute part numbers are not available in verified sources. Consider consulting Cirrus Logic application notes for pin-compatible alternatives or modern replacements with similar ISA interface capabilities.