SN74CBT16244DL

Overview

The SN74CBT16244DL is a 16-bit FET bus switch from Texas Instruments, organized as four independent 4-bit low-impedance switches. It operates within a supply voltage range of 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 and utilizes a 48-pin SSOP (DL) package. Key electrical characteristics include a typical on-state resistance of 7 ohms at 5 V and propagation delays ranging from 0.35 ns to 0.8 ns depending on the supply voltage.

Feature Summary

• Provides high-speed bidirectional data transfer between two ports with minimal propagation delay due to low on-state resistance.
• Features separate output-enable inputs for each 4-bit switch group, allowing flexible control over data flow direction or disconnection.
• Maintains high-impedance state when disabled, effectively isolating connected ports.

Applications

• High-speed TTL-compatible bus switching applications
• Bidirectional data routing in digital systems
• Port isolation in multi-port architectures

Procurement Notes

Verify that the specific ordering suffix 'DL' corresponds to the SSOP package type and tube packaging configuration. Confirm the operational temperature range requirements align with the specified -40°C to +85°C limits. Ensure compatibility with the 4 V to 5.5 V supply voltage range before procurement.

Selection Notes

Select this component for applications requiring 16-bit wide bus switching with TTL-compatible logic levels. Consider the 48-pin SSOP package constraints regarding board space and thermal management. Evaluate the need for separate enable controls per 4-bit segment against system design complexity.

Part Context

This device belongs to Texas Instruments' Widebus family, designed for standard '16244-type pinout compatibility. It serves as a solution for connecting buses where bidirectional data transfer and port isolation are required without significant signal degradation.

Replacement Considerations

SN74CBT16244DGGR: Active production alternative in TSSOP package.

FAQ

How is the SN74CBT16244DL organized internally?

It is organized as four independent 4-bit low-impedance switches, each with its own output-enable input.

What determines the propagation delay of the switch?

The propagation delay is determined by the RC time constant of the switch's on-state resistance and the load capacitance, varying with supply voltage.