SN74CBT3126PWR

Overview

The SN74CBT3126PWR 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 single-pole single-throw (SPST) switches. Key electrical parameters include a maximum on-state resistance (Ron) of 7 ohms, a typical Ron of 5 ohms, and a bandwidth of 200 MHz. The device exhibits a propagation delay of 250 ps and supports powered-off protection. It is housed in a 14-pin TSSOP package and functions across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides four independent bilateral bus switches for signal routing
• Supports powered-off protection to prevent current leakage when power is off
• Compatible with SPI and JTAG signal interfaces

Applications

• Signal routing in portable devices
• Data switching in consumer electronics
• SPI and JTAG interface buffering

Procurement Notes

Verify the specific suffix PWR confirms the TSSOP-14 package and tape-and-reel shipping configuration. Ensure the component meets RoHS compliance requirements if mandated by your assembly process. Confirm the operating temperature grade matches your environmental specifications. Cross-reference the manufacturer part number with official distributor catalogs to validate authenticity and revision status before procurement.

Selection Notes

Select this component for applications requiring low-voltage operation between 2.3 V and 3.6 V. The 7-ohm maximum on-resistance suits general-purpose data switching where minimal signal attenuation is required. The TSSOP-14 package is appropriate for space-constrained surface-mount designs. Consider the 200 MHz bandwidth for high-speed digital signals such as SPI or JTAG interfaces.

Part Context

This device belongs to the SN74CBT series of low-voltage bus switches from Texas Instruments. It utilizes CMOS technology to achieve low power consumption and high speed. The '126-type pinout ensures compatibility with standard buffer gate footprints, facilitating easy integration into existing circuit designs that require bidirectional data flow control.

Replacement Considerations

The SN74CBTLV3126 is a related variant within the same family. Verify pinout compatibility and specific electrical tolerances before substitution. Other members of the SN74CBT series may offer different channel counts or package options.