PCI4450GFN

Specialized Overview

The Texas Instruments PCI4450 is a three-function PCI device integrating dual-socket PC Card controllers and an IEEE 1394 Open Host Controller Interface (OHCI) link function. Functions 0 and 1 provide independent PC Card socket control compliant with the 1997 PC Card Standard, supporting 16-bit and CardBus cards at 3.3 V or 5 V. Function 2 implements the OHCI specification for IEEE 1394 data rates of 100, 200, and 400 Mbits/second. The device features a 3.3-V core logic with universal PCI interfaces compatible with 3.3-V and 5-V signaling environments. It supports hot insertion/removal, distributed DMA, zoomed video paths, and PCI power management specifications.

Specialized Feature Summary

• Integrates dual PC Card sockets and IEEE 1394 OHCI controller in a single package
• Supports mixed 5-V and 3.3-V PC Card16 and CardBus cards with hot insertion
• Provides internal buffering for zoomed video and advanced filtering on card detect lines
• Includes programmable multifunction pins and serial EEPROM interface for subsystem configuration

Specialized Applications

• Laptop and notebook computer motherboard design
• Industrial PC systems requiring expansion capabilities
• Multimedia workstations utilizing IEEE 1394 peripherals

Specialized Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the specific GFN or GJG package variant matches the required pinout for the target PCB layout. Ensure compliance with RoHS directives if applicable to the manufacturing environment. Review the datasheet for absolute maximum ratings to prevent operational damage during system integration.

Specialized Selection Notes

Select the GFN package for standard BGA configurations or the GJG Micro-Star BGA variant based on board space constraints. Evaluate the need for external power switches, as the device utilizes a serial interface to control TPS2206 units. Consider the available interrupt modes and GPIO flexibility when designing the system architecture. Verify compatibility with the host PCI bus voltage levels before finalizing the component choice.

Specialized Part Context

The PCI4450 serves as a legacy bridge solution for systems requiring simultaneous PC Card and FireWire connectivity. It replaces discrete controller chips by consolidating functionality into a single CMOS component. This integration reduces board complexity and component count for manufacturers designing portable computing devices during the late 1990s and early 2000s.

Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.