SN74CBTS16211DLR

Overview

The SN74CBTS16211DLR is a 24-bit FET bus switch from Texas Instruments, featuring Schottky diode clamping on I/Os to prevent undershoot. It operates as two independent 12-bit switches or one 24-bit switch with low on-state resistance and minimal propagation delay. The device supports TTL-compatible input and output levels and functions within a supply voltage range of 4 V to 5.5 V. It is housed in a 56-pin SSOP (DL) package and operates across an extended temperature range of -40°C to +85°C.

Feature Summary

• Integrates Schottky diodes on all I/O ports to clamp negative undershoot voltages.
• Configurable as dual 12-bit or single 24-bit high-speed bus switches.
• Provides TTL-compatible logic levels for control inputs and outputs.
• Features low on-state resistance for minimal signal propagation delay.

Applications

• High-speed data routing between parallel buses
• Signal switching in telecommunications equipment
• Data acquisition systems requiring bidirectional transfer

Procurement Notes

Verify the specific DL package designation matches the required SSOP footprint during procurement. Confirm that the ordering suffix corresponds to tape-and-reel packaging if automated assembly is planned. Ensure the component meets RoHS compliance requirements for the target market. Cross-reference the manufacturer part number against current availability status to avoid obsolete stock issues.

Selection Notes

Select this component when designing circuits requiring 24-bit wide data paths with low insertion loss. The integrated Schottky protection eliminates the need for external clamping components. Verify that the system operating voltage falls within the 4 V to 5.5 V range. Consider the 56-pin SSOP package constraints regarding PCB space and thermal dissipation capabilities.

Part Context

This device belongs to Texas Instruments' Widebus family of bus switches. It is designed for applications demanding high-density signal routing with fast switching speeds. The SN74CBTS16211DLR variant specifically utilizes the SSOP package format, distinguishing it from TSSOP or TVSOP alternatives within the same functional family.

Replacement Considerations

SN74CBTS16211DGGR (TSSOP package)

FAQ

How does the device handle negative voltage spikes?

Schottky diodes are integrated directly onto the I/O pins to clamp undershoot voltages, protecting the internal FET structure.

Can the 24 bits be controlled independently?

Yes, the device contains two separate 12-bit switches, each with its own output enable (OE) pin for independent control.