FSSD07BQX

Overview

The FSSD07BQX is a dual-host multiplexer switch IC designed for SD/SDIO and MMC memory card interfaces. It features a 1-bit or 4-bit configuration with two channels in a 1 x 2:1 topology. The device supports low-voltage digital I/O levels, enabling compatibility with various host controllers. It operates within a temperature range of -40°C to +85°C and is available in a compact surface-mount package suitable for space-constrained portable electronic designs.

Feature Summary

• Supports dual-host switching for SD, SDIO, and MMC memory cards
• Configurable 1-bit or 4-bit data path selection
• Low on-resistance for efficient signal transmission
• Compatible with standard low-voltage logic levels

Applications

• Portable multimedia devices requiring dual memory card slots
• Digital cameras with expandable storage capabilities
• Mobile phones and tablets supporting external memory expansion
• Embedded systems utilizing SD/MMC interface protocols

Procurement Notes

Verify the specific suffix BQX against the official datasheet to confirm package type and tape/reel specifications. Confirm end-of-life status as distribution availability may be limited. Ensure the selected variant matches the required pinout and electrical characteristics for the target application design.

Selection Notes

Select this component when designing systems requiring seamless switching between two hosts for a single memory card slot. Verify that the input voltage levels match the host controller outputs. Consider the physical footprint constraints and ensure the package style fits the PCB layout requirements for the intended portable application.

Part Context

This part belongs to the FSSD07 series of multiplexer switches from onsemi (formerly Fairchild Semiconductor). The series focuses on managing memory card interfaces in consumer electronics. It serves as a bridge between host processors and storage media, facilitating flexible memory configurations in compact devices.

Replacement Considerations

The FSSD06 is a related two-port multiplexer within the same family. Verify pin compatibility and functional equivalence before substitution. Check if the alternative part meets the specific 1-bit/4-bit configuration needs of the original design.