SN74LVC257APWRE4

Overview

The SN74LVC257APWRE4 is a quadruple 2-line to 1-line data selector and multiplexer with 3-state outputs. It operates from 1.65V to 3.6V VCC, accepts inputs up to 5.5V, and features a maximum propagation delay of 4.6ns at 3.3V. The device provides ESD protection exceeding 2000V (HBM) and latch-up performance over 250mA. Packaged in TSSOP-16, it supports mixed 3.3V/5V system environments.

Feature Summary

• Provides four independent 2-to-1 multiplexing channels with high-impedance 3-state outputs controlled by an active-low OE pin.
• Accepts input voltages up to 5.5V while operating on lower supply rails, enabling direct translation between 3.3V and 5V logic domains.
• Features robust electrostatic discharge protection and high latch-up tolerance for reliable operation in demanding industrial environments.

Applications

• Cable Modem Termination Systems
• Tests and Measurements
• I/O Expanders
• Motor Drivers
• Network Switches

Procurement Notes

Verify the specific suffix 'E4' indicates RoHS compliance and manufacturing location details as defined by Texas Instruments. Confirm the package type matches the required PCB footprint. Ensure the ordering quantity aligns with the reel specifications provided in the packaging addendum. Cross-reference the datasheet revision date to confirm current parameter validity before finalizing procurement.

Selection Notes

Select this component when designing bus-organized systems requiring signal multiplexing between 4-bit data sources and output lines. It is suitable for applications needing level translation between 3.3V and 5V devices. Consider the 4.6ns maximum propagation delay for timing constraints. Verify that the 3-state outputs meet the bus loading requirements of the target system architecture.

Part Context

This part belongs to the SNx4LVC257A family of quadruple 2-line to 1-line data selectors. It utilizes CMOS technology to provide balanced output drive capabilities. The device is designed specifically for low-voltage digital signal processing applications where space efficiency and voltage compatibility are critical design factors.

Replacement Considerations

SN74LVC257APWR

FAQ

How does the device handle mixed voltage environments?

The inputs accept voltages up to 5.5V, allowing them to be driven directly by 3.3V or 5V devices. This enables the SN74LVC257APWRE4 to function effectively as a translator in mixed 3.3V and 5V system environments.

What is the recommended handling for unused inputs?

To ensure proper device operation and prevent undefined states, all unused inputs must be held at VCC or GND. Floating inputs should be avoided as they can lead to excessive power consumption or erratic behavior.