TS5N412DBQR

Overview

The TS5N412DBQR is a high-bandwidth FET bus switch manufactured by Texas Instruments, housed in a 16-pin SSOP (DBQ) package. It functions as a 4-bit 1-of-2 multiplexer/demultiplexer with a single output-enable input. The device utilizes a charge pump to elevate the gate voltage of pass transistors, ensuring low and flat ON-state resistance for minimal propagation delay and rail-to-rail switching on data I/O ports. It operates within a supply voltage range of 4.75 V to 5.25 V and supports bidirectional data flow between A and B ports when enabled. Key electrical parameters include a typical ON-state resistance of 3 Ω at 5 V, a maximum propagation delay of 3 ns, and an OFF isolation of -50 dB at 25 MHz.

Feature Summary

• Features a charge pump mechanism that elevates gate voltage to provide low and flat ON-state resistance characteristics over the operating range.
• Supports both digital and analog applications with near-zero propagation delay and low distortion signal gating capabilities.
• Includes dedicated Ioff circuitry to prevent damaging current backflow through the device during partial-power-down scenarios.

Applications

• PCI interface systems
• Memory interleaving architectures
• Bus isolation circuits

Procurement Notes

Verify the ordering suffix DBQR corresponds to the tape and reel packaging format containing 2500 units per large reel. Confirm the top-side marking YB412 matches the specific production lot requirements. Ensure the component meets RoHS compliance standards and Level-2 moisture sensitivity ratings suitable for surface-mount assembly processes.

Selection Notes

Select this component for high-bandwidth applications requiring optimized interfaces for broadband communications or networking. The device is suitable for data-intensive computing systems where low capacitive loading minimizes signal distortion. Consider the 4.75 V to 5.25 V operating range and the requirement for a pullup resistor on the OE pin to ensure high-impedance states during power transitions.

Part Context

This part belongs to the TS5N412 series of 4-bit 1-of-2 FET multiplexers and demultiplexers. The DBQR suffix specifically denotes the shrink small-outline package variant supplied in tape and reel format. It shares functional specifications with the PW package version but differs in physical dimensions and manufacturing packaging logistics.

Replacement Considerations

The TS5N412PW serves as a direct functional alternative utilizing a TSSOP package. Verify pinout compatibility and thermal impedance differences between the DBQ and PW packages before substitution.

FAQ

How does the TS5N412 handle partial-power-down conditions?

The device features Ioff circuitry that prevents damaging current backflow through the switches when the device is powered down, ensuring isolation during power-off states.

What is the typical ON-state resistance of the TS5N412?

The typical ON-state resistance is 3 Ω at a supply voltage of 5 V, providing low and flat resistance characteristics across the operating range.

How is the high-impedance state ensured during power-up or power-down?

The OE pin should be tied to VCC through a pullup resistor to ensure the high-impedance state exists during power transitions; the minimum resistor value depends on the driver's current-sinking capability.