SN74LVC157APWE4

Overview

The SN74LVC157APWE4 is a quadruple 2-line to 1-line data selector/multiplexer manufactured by Texas Instruments. It operates from a supply voltage of 1.65V to 3.6V and accepts input voltages up to 5.5V, enabling direct interfacing with 3.3V or 5V devices in mixed-signal systems. The device features a common strobe (G) input that forces all outputs low when high; when low, it routes selected data from two sources to four outputs based on the address select pin (A/B). It provides true non-inverted data outputs and includes ESD protection exceeding 2000V HBM and 1000V CDM.

Feature Summary

• Operates within a wide supply voltage range of 1.65V to 3.6V
• Inputs accept voltages up to 5.5V for compatibility with 5V logic
• Features a common active-low strobe input to control output states
• Provides robust electrostatic discharge protection

Applications

• Translating data between mixed 3.3V and 5V system environments
• Routing 4-bit words from one of two register groups to common output buses
• Implementing irregular logic functions as a function generator

Procurement Notes

Verify the specific ordering suffix 'E4' against the latest TI Package Option Addendum to confirm material composition and lead finish specifications. Ensure the TSSOP-16 package variant matches the thermal and mechanical requirements of the target PCB layout. Confirm RoHS compliance status and moisture sensitivity level ratings prior to assembly planning.

Selection Notes

Select this component when designing circuits requiring quadruple multiplexing with 5V tolerant inputs in low-voltage environments. Consider the maximum propagation delay specifications at the intended operating voltage and temperature range. Evaluate the thermal resistance characteristics if the application involves significant power dissipation or limited airflow conditions.

Part Context

This part belongs to the SNx4LVC157A family of quadruple 2-line to 1-line data selectors. The 'SN74' prefix indicates commercial grade operation, while the 'LVC' designation specifies Low-Voltage CMOS technology optimized for 1.65V to 3.6V operation. The 'PW' suffix identifies the 16-pin Thin-Shrink Small-Outline Package (TSSOP), and 'E4' denotes environmental compliance attributes.

Replacement Considerations

SN74LVC157ADBR

FAQ

How does the common strobe input affect the outputs?

When the strobe input (G) is high, all outputs are forced low regardless of other input conditions. When G is low, the device selects data from the specified inputs based on the address select pin.

Can this device interface directly with 5V logic?

Yes, the inputs accept voltages up to 5.5V, allowing the device to be driven by 3.3V or 5V devices without additional level shifting components.