DM74ALS533N

Latches Overview

The DM74ALS533N is an octal transparent latch manufactured by Fairchild Semiconductor, belonging to the Advanced Low-Power Schottky (ALS) logic family. It features eight D-type latches with inverted outputs and three-state capability. The device operates within a supply voltage range of 4.5V to 5.5V and supports a propagation delay of 19ns at 4.5V. It utilizes a 20-pin Small Outline Integrated Circuit (SOIC) package and functions across a commercial temperature range of 0°C to +70°C.

Latches Feature Summary

• Octal configuration providing eight independent transparent latch circuits in a single package
• Three-state output capability allowing effective bus isolation when disabled
• Inverted output polarity for direct interfacing with active-low logic requirements
• Advanced Low-Power Schottky construction ensuring high-speed performance with reduced power consumption

Latches Applications

• High-performance memory decoding systems requiring short propagation delays
• Data transmission systems utilizing asynchronous bidirectional data buses
• Microprocessor systems needing temporary storage for address or data lines

Latches Procurement Notes

Verify the specific manufacturer origin, as onsemi acquired Fairchild's semiconductor business. Confirm the package type matches the SOIC-20 specification and ensure the operating temperature range aligns with commercial requirements. Check for RoHS compliance status if environmental regulations apply to the target assembly process.

Latches Selection Notes

Select this component when designing systems that require octal data storage with tri-state bus control. The ALS series offers superior speed compared to standard LS logic while maintaining lower power dissipation than standard S series devices. Ensure the design accommodates the 4.5V to 5.5V supply voltage constraints and the specific current drive capabilities of the inverted outputs.

Latches Part Context

This part belongs to the widely used 74-series logic family, specifically the ALS variant known for balancing speed and power efficiency. The 533 function code denotes an octal latch with inverted outputs, distinct from non-inverting variants like the 573. It serves as a fundamental building block for digital data path management in legacy and industrial electronic designs.

Latches Replacement Considerations

Direct substitutes include the DM74ALS533WM_Q from onsemi/Fairchild. Other compatible alternatives may exist within the same ALS family from different manufacturers, provided pinouts and electrical characteristics match.