SN74AHCT08DG4

Overview

The SN74AHCT08DG4 is a quadruple 2-input positive-AND gate manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL-compatible inputs that allow up translation from 3.3 V to 5 V. The device provides low drive output currents of ±8 mA and includes ESD protection exceeding 2000 V via the human-body model. It is housed in a 14-pin SOIC package.

Feature Summary

• TTL-voltage compatible inputs enable signal up translation from 3.3 V to 5 V
• Low-drive outputs minimize overshoot and undershoot on signal lines
• Slow rise and fall times reduce ringing on output signals

Applications

• Servers
• Network switches
• PCs and notebooks
• Electronic points-of-sale

Procurement Notes

Verify the specific 'G4' suffix indicates compliance with RoHS directives, as this designation typically denotes lead-free packaging. Confirm the package type matches the required footprint for your PCB layout. Ensure all unused inputs are tied to VCC or GND to prevent undefined operational states during operation.

Selection Notes

Select this component when bus-interface applications require minimized output ringing and slow edge rates. It is suitable for designs needing TTL input compatibility while operating at 5 V logic levels. Verify that the low drive current meets the load requirements without causing excessive propagation delays.

Part Context

This part belongs to the SNx4AHCT08 family of quadruple 2-input positive-AND gates. The family utilizes CMOS technology to provide balanced output drive capabilities. The 'DG4' variant specifically identifies the SOIC package style combined with environmental compliance attributes defined by the manufacturer.

Replacement Considerations

SN74AHCT08DR

FAQ

How does the device handle floating inputs?

All unused inputs must be connected to either VCC or GND. Leaving inputs unconnected results in undefined voltages and operational states.

What is the maximum input voltage tolerance?

Inputs are overvoltage tolerant, allowing them to accept voltages up to 5.5 V regardless of the valid VCC level.