SN74CBTH16211DL

Overview

The SN74CBTH16211DL is a 24-bit FET bus switch manufactured by Texas Instruments, housed in a 56-pin SSOP (DL) package. It operates on a single supply voltage ranging from 4 V to 5.5 V and supports an operating temperature range of -40°C to 85°C. The device features TTL-compatible input levels with high-level control input voltage (VIH) of 2 V and low-level control input voltage (VIL) of 0.8 V. Electrical characteristics include a typical on-state resistance (ron) of 7 Ω at VCC = 4.5 V and 30 mA current. Switching performance under recommended conditions with a 50 pF load capacitance shows a maximum propagation delay (tpd) of 0.35 ns at 4 V and 0.25 ns at 5 V.

Feature Summary

• Integrated active bus-hold circuitry maintains unused or floating ports at valid logic levels without external pullup/pulldown resistors.
• Dual 12-bit bus switch organization allows configuration as two independent switches or one combined 24-bit switch via separate output-enable inputs.
• Low on-state resistance enables high-speed connections with minimal signal propagation delay.

Applications

• High-speed data routing between system buses
• Portable equipment requiring low power consumption
• Computer and graphics cards

Procurement Notes

Verify the specific DL package designation corresponds to the SSOP form factor when sourcing. Confirm that the component meets the required thermal impedance specifications for your application environment. Ensure compatibility with standard surface-mount assembly processes. Check for any specific handling requirements related to moisture sensitivity levels during storage and soldering.

Selection Notes

Select this component for applications requiring 24-bit wide data paths with fast switching speeds. The integrated bus hold feature simplifies board design by eliminating the need for discrete resistors. Consider the 56-pin SSOP package constraints regarding PCB space and pin density. Verify that the 4 V to 5.5 V supply range aligns with your system's power architecture.

Part Context

This part belongs to the SN74CBT series of low-voltage CMOS bus switches. It is functionally similar to other 24-bit switches but distinguished by its specific bus-hold capability and TTL-compatible input thresholds. The DL suffix indicates the SSOP package variant, differentiating it from tape-and-reel options like the DGG or DGV packages.

Replacement Considerations

Direct substitutes may include other SN74CBTH16211 variants with different packaging, such as SN74CBTH16211DGGR or SN74CBTH16211DGVR, provided the pinout and electrical characteristics remain identical. Cross-reference with other 24-bit bus switches if package changes are acceptable.