SN74CBTLV3126DBQR

Overview

The SN74CBTLV3126DBQR is a low-voltage quadruple FET bus switch manufactured by Texas Instruments. It operates on a single power supply ranging from 2.3V to 3.6V and features four independent channels configured as 1x1:1 switches. The device is housed in a 16-SSOP package with a width of 3.90mm. It supports an operating temperature range from -40°C to 85°C and includes powered-off protection capabilities.

Feature Summary

• Integrates four independent FET-based bus switches for signal routing
• Provides powered-off protection to prevent current leakage when the device is unpowered
• Supports high-speed data transmission suitable for SPI and JTAG interfaces

Applications

• SPI interface signal switching
• JTAG boundary scan circuitry
• Portable consumer electronics
• Industrial control systems

Procurement Notes

Verify the specific package variant, as the DBQR suffix denotes a 16-SSOP form factor. Confirm that the application voltage remains within the 2.3V to 3.6V single-supply range. Ensure thermal requirements align with the -40°C to 85°C industrial grade specification during component sourcing.

Selection Notes

Select this component when a low-voltage, quad-channel bus switch is required for portable or industrial applications. It serves as a direct functional alternative to other quadruple bus switches within the CBTLV family, provided the pinout and package dimensions match the design constraints.

Part Context

This part belongs to the SN74CBTLV3126 family of low-voltage quadruple FET bus switches. While the core logic function remains consistent across the family, the DBQR suffix specifically identifies the 16-SSOP package configuration, distinguishing it from TSSOP or TVSOP variants like the PWR or DGVR models.

Replacement Considerations

Public confirmed substitutes include the SN74CBTLV3126PWR (TSSOP) and SN74CBTLV3126DGVR (TVSOP). Cross-package replacements require verification of footprint compatibility and mechanical height constraints.