SN74AS805BDW

Overview

The SN74AS805BDW is a hex 2-input NOR gate from the Texas Instruments AS-TTL logic family, housed in a 20-pin plastic small-outline (DW) package. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of 0°C to 70°C. The device provides high capacitive-drive capability with a typical propagation delay of 4.3 ns at a 50 pF load. Electrical characteristics include a low-level output current of up to 48 mA and a high-level output current of -48 mA.

Feature Summary

• Contains six independent 2-input NOR drivers for Boolean logic operations
• Features high capacitive-drive capability suitable for demanding loads
• Provides fast switching performance with typical delays around 4.3 ns

Applications

• High-speed digital logic processing circuits
• Memory address decoding systems
• General-purpose logic control applications

Procurement Notes

Verify that the specific part number matches the required AS-TTL series specifications. Confirm the package type corresponds to the plastic small-outline variant. Ensure the operating temperature range meets the application requirements. Check for any RoHS compliance status updates on official manufacturer channels before procurement.

Selection Notes

Select this component when high-speed NOR logic functionality is required alongside significant drive strength. The AS-TTL series offers faster switching speeds compared to standard TTL or ALS families. Consider the 20-pin SOIC package constraints for PCB layout and thermal management during the design phase.

Part Context

This device belongs to the Texas Instruments SN74AS805B series, which utilizes Advanced Schottky TTL technology. The 'B' suffix denotes the specific generation within the AS family, offering optimized speed and power dissipation characteristics compared to earlier iterations like the ALS variants.

Replacement Considerations

SN74ALS805A serves as a lower-power alternative within the same functional category. Verify pin compatibility and electrical parameter differences, particularly regarding drive current and propagation delay, when substituting between these logic families.