SN74CBTS16211DGGR

Overview

The SN74CBTS16211DGGR is a 24-bit FET bus switch from Texas Instruments, housed in a 56-pin TSSOP package. It operates on a single supply voltage ranging from 4V to 5.5V and supports an operating temperature range of -40°C to 85°C. The device provides two independent 12-bit switches or one 24-bit switch with TTL-compatible input and output levels. Key electrical characteristics include a typical propagation delay of 0.25ns at 5V, low on-state resistance (typically 7 Ohms), and integrated Schottky diode clamping on I/Os to prevent undershoot.

Feature Summary

• Integrates Schottky diodes on all I/O ports to clamp signal undershoot and protect against negative voltage excursions.
• Provides high-speed bus switching with minimal propagation delay due to low on-state resistance.
• Features TTL-compatible input and output logic levels for direct interfacing with standard digital systems.
• Configurable as dual 12-bit or single 24-bit switches via dedicated control inputs.

Applications

• High-speed data routing in computer and telecommunications equipment.
• Signal switching in consumer electronics requiring TTL compatibility.
• Bus expansion architectures in industrial control systems.
• Data line protection in portable devices operating at 5V.

Procurement Notes

Verify the component status as NRND (Not Recommended for New Designs) before finalizing designs. Confirm that the specific DGG package variant matches the required PCB footprint. Ensure design reviews account for the discontinuation timeline to avoid future supply constraints. Validate that the 4V-5.5V supply range aligns with the target system power rails.

Selection Notes

Select this component when a 24-bit wide bus switch with TTL compatibility is required. The integrated Schottky cladding makes it suitable for applications prone to signal undershoot. Consider the 56-pin TSSOP form factor for space-constrained layouts. Verify that the 0.25ns propagation delay meets the timing requirements of the specific bus architecture.

Part Context

This part belongs to Texas Instruments' Widebus family of high-density bus switches. It is designed to replace older discrete switching solutions by integrating multiple channels into a single IC. The SN74CBTS16211 series focuses on 5V operation, distinguishing it from lower-voltage variants like the CBTLV series. It serves as a foundational component for managing parallel data paths in legacy and current 5V-centric systems.

Replacement Considerations

Public confirmed substitute part numbers: SN74CBT16211ADGGR, SN74CBTD16211DGGR, SN74CBTS16211DGVR.