SN74AHCT08D

Overview

The SN74AHCT08D is a quadruple 2-input positive-AND gate manufactured by Texas Instruments in the AHCT logic series. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL-compatible inputs allowing up translation from 3.3 V to 5 V. The device provides balanced output drive with low-level and high-level output currents of 8 mA each. Propagation delay ranges from 1 ns to 9 ns depending on load capacitance (15 pF or 50 pF). It is housed in a 14-pin SOIC package and supports an operating temperature range of -40°C to +125°C.

Feature Summary

• TTL-voltage compatible inputs enable signal up translation from 3.3 V to 5 V
• Low-drive outputs provide slow rise and fall times to minimize signal ringing
• High ESD protection performance exceeding standard human-body and machine model ratings

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current Package Option Addendum, as the base part number may be obsolete while variants like SN74AHCT08DR remain active. Confirm that the component status matches project requirements, noting that availability and lead times are subject to change without notice. Ensure compliance with RoHS standards and check for any specific material finish options required for assembly processes.

Selection Notes

Select this component when TTL-to-CMOS level translation is required between 3.3 V and 5 V domains. The slow edge rates make it suitable for bus-interface applications where output ringing must be minimized. Verify that the 8 mA drive capability meets the load requirements and that the SOIC-14 package dimensions fit the PCB layout constraints.

Part Context

This device belongs to the SNx4AHCT08 family of quadruple 2-input positive-AND gates. The 'D' suffix specifically denotes the 14-pin Small Outline Integrated Circuit (SOIC) package variant. While the datasheet lists the SN74AHCT08D as obsolete, other package versions such as the DR (SOIC tape and reel) remain active production items within the same logical family.

Replacement Considerations

SN74AHCT08DR