SN74CBTLV16800DL

Overview

The SN74CBTLV16800DL is a low-voltage 20-bit FET bus switch manufactured by Texas Instruments. It provides high-speed switching with a typical on-state resistance of 5 ohms and propagation delay of 0.15 ns at 3.3 V. The device operates within a supply voltage range of 2.3 V to 3.6 V and supports an operating temperature from -40°C to 85°C. It features precharged B-port outputs via the BIASV pin to minimize live-insertion noise, and includes Ioff support for partial-power-down applications.

Feature Summary

• Provides 20 bits of high-speed bus switching organized as dual 10-bit switches with separate output-enable inputs.
• Features precharged B-port outputs driven by a user-selectable bias voltage to minimize signal distortion during live insertion.
• Supports partial-power-down mode operation through Ioff functionality to prevent damaging backflow current when powered down.

Applications

• High-speed data bus switching in portable electronic devices
• Live insertion applications requiring minimized signal distortion
• Partial-power-down systems requiring isolation during power off

Procurement Notes

Verify the specific package type (SSOP) and ordering suffix against the manufacturer's latest documentation before procurement. Confirm that the component meets all required environmental standards and operational parameters for the intended application environment.

Selection Notes

Select this component for applications requiring low on-resistance and minimal propagation delay in low-voltage environments. Ensure the design accommodates the BIASV pin requirements for precharging and utilizes pullup resistors on OE pins to maintain high-impedance states during power transitions.

Part Context

This component belongs to the Widebus family of Texas Instruments logic products. It is designed for compact, high-density digital switching applications where low power consumption and fast switching speeds are critical. The DL package designation indicates a 48-pin SSOP form factor suitable for surface-mount assembly.

Replacement Considerations

Direct replacements include SN74CBTLV16800GR and SN74CBTLV16800VR, which offer identical electrical characteristics but utilize TSSOP and TVSOP packages respectively. Verify pin compatibility and thermal performance when substituting different package types.

FAQ

How does the device handle live insertion?

The B-port outputs are precharged to a user-selectable bias voltage (BIASV) to minimize signal distortion and noise during live insertion events.

What is the function of the Ioff feature?

The Ioff feature ensures that damaging current will not backflow through the device when it is powered down, supporting partial-power-down applications.