SN74CBTLV3126D

Overview

The SN74CBTLV3126D is a low-voltage quadruple FET bus switch manufactured by Texas Instruments. It operates within a supply voltage range of 2.3 V to 3.6 V and features four independent channels. The device supports powered-off protection, allowing I/O lines to remain high-impedance when the device is unpowered. It is designed for applications requiring SPI and JTAG signal support. The component is housed in a SOIC-14 package and functions across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides four independent single-pole single-throw (SPST) switches for bidirectional data transmission
• Includes powered-off protection to maintain high-impedance state during power loss
• Supports standard digital interface protocols including SPI and JTAG signals

Applications

• Portable equipment utilizing low-voltage power supplies
• Memory card slots and connectors
• SPI and JTAG interface circuits

Procurement Notes

Verify the specific suffix 'D' corresponds to the SOIC-14 package variant from official Texas Instruments documentation. Confirm RoHS compliance status and moisture sensitivity level requirements against current datasheet revisions before procurement. Ensure ordering specifications match the required tape-and-reel or tube packaging options available for this part number.

Selection Notes

Select this component for designs requiring low on-resistance and minimal propagation delay in low-voltage environments. Compare total channel count and package dimensions against system constraints. Evaluate compatibility with existing logic families and ensure the 2.3 V minimum supply voltage aligns with the target application's power architecture.

Part Context

This device belongs to the SN74CBTLV3126 family of low-voltage bus switches. It serves as a signal routing solution for managing multiple data lines in compact electronic systems. The family is characterized by its ability to handle bidirectional traffic while maintaining signal integrity at reduced voltage levels compared to traditional CMOS switches.

Replacement Considerations

Check for direct pin-compatible alternatives such as the SN74CBTLV3126PWR or SN74CBTLV3126PWRE4 if different packaging is required. Verify functional equivalence with other quadruple bus switches from Texas Instruments or third-party manufacturers offering similar voltage ranges and channel counts.