78Q8430-100IGTR/F

Overview

The 78Q8430-100IGTR/F is a single-chip 10/100 Fast Ethernet controller integrating an IEEE 802.3 compliant MAC and PHY, optimized for host processor offloading in multimedia applications. It features a non-PCI pseudo-SRAM Host Bus Interface supporting 8-bit, 16-bit, and 32-bit data bus widths with big/little endian support. The device includes an Address Resolution Controller (ARC) with up to 12 perfect address filters, wildcard filtering, and 64 kB JUMBO packet support. It provides four transmit priority levels for QoS, adaptive 32 kB SRAM FIFO allocation, and traffic offload capabilities including IP checksum and firewall functions. Operating within an industrial temperature range of -40 °C to +85 °C, it supports Wake on LAN via Magic Packet or OnNow.

Feature Summary

• Integrates a 10Base-T/100Base-TX MAC and PHY with Auto MDI-X and Auto-Negotiation capabilities.
• Features a flexible non-PCI pseudo-SRAM Host Bus Interface supporting asynchronous and synchronous modes.
• Includes an Address Resolution Controller with multiple perfect address filtering and wildcard recognition.
• Provides Traffic Offload Engine functionality for APF, ICMP Echo, and IP Firewall configuration.

Applications

• Satellite, cable, and IPTV Set Top Boxes
• Multi Media Residential Gateways
• High Definition 1080p/1080i DTVs
• IP-PVR and video distribution systems
• Low latency industrial automation

Procurement Notes

Verify the specific suffix 'F' against the manufacturer's official documentation to confirm lead-free compliance status. Confirm the package type matches the required system design constraints. Ensure the operating temperature range aligns with the intended deployment environment. Cross-reference the revision level with the latest datasheet to validate feature availability.

Selection Notes

Select this component for designs requiring low host CPU utilization and high throughput for streaming video over IP. The integrated MAC and PHY simplify board layout by reducing external component count. Consider the available buffer sizes and queue management features when designing memory-intensive multimedia applications. Verify compatibility with the target processor's bus interface timing requirements.

Part Context

This part belongs to the Teridian 78Q series of Ethernet controllers, designed for demanding multimedia environments. It serves as a bridge between host processors and Ethernet networks, handling protocol processing internally. The integration of MAC and PHY reduces system complexity compared to discrete solutions. It is suitable for applications where power conservation and ease of development are critical priorities.

Replacement Considerations

Consult Analog Devices or Maxim Integrated technical support for verified replacement part numbers. Ensure any substitute maintains compatibility with the non-PCI pseudo-SRAM interface. Verify that alternative components support the same industrial temperature range and RoHS compliance standards.

FAQ

What types of address filtering does the 78Q8430 support?

The device supports multiple perfect address filtering (up to 12 default), wildcard address filtering, individual/multicast/broadcast address recognition, positive/negative filtering, and promiscuous mode.

How does the 78Q8430 handle power management?

It offers low power and flexible power supply management, including power down/save modes, Wake on LAN via Magic Packet or OnNow packets, and wake-up on link status change.

What is the maximum packet size supported by the 78Q8430?

The 78Q8430 supports 64 kB JUMBO packet sizes.