DM74ALS533N Equivalent & Substitute Parts

Part Overview

The DM74ALS533N is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring an 8:8 multiplexer configuration with tri-state output capability. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement. The part operates within the 74ALS logic family standard, which defines electrical and mechanical compatibility parameters for direct substitution.

Substiute Parts

DM74ALS533N

onsemiIn Stock: 958DM74ALS533N Datasheet

Current PartRFQ

SN74ALS533AN

Texas InstrumentsIn Stock: 858SN74ALS533AN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74ALS533N is determined by strict adherence to the following critical parameters:

• Logic family and base product number (74ALS533)
• Circuit topology (D-Type Transparent Latch, 8:8 configuration)
• Output type (Tri-State)
• Supply voltage compatibility (4.5V ~ 5.5V)
• Package form factor (20-DIP)
• Mounting technology (Through Hole)
• Output current specifications (2.6mA high, 24mA low)
• Operating temperature range (0°C ~ 70°C)

The SN74ALS533AN from Texas Instruments meets all substitution criteria within these defined parameters. Propagation delay variance (4ns vs. 6ns) remains within acceptable operational margins for 74ALS logic family applications and does not preclude functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS533AN represents a direct functional equivalent for DM74ALS533N applications. Both components share identical logic family classification, circuit topology, electrical specifications, and physical packaging. The primary distinction is product status: the DM74ALS533N is obsolete while the SN74ALS533AN maintains active production status, ensuring long-term availability and supply chain continuity.

The SN74ALS533AN carries ROHS3 compliance certification, meeting current environmental and regulatory requirements for new designs and procurement cycles. Both parts maintain REACH compliance status. The propagation delay differential (2ns) is characteristic of manufacturing process variations within the 74ALS logic family and does not impact functional compatibility in standard latch applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS533AN directly replace the DM74ALS533N in existing designs?

A: Yes. Both components are 74ALS533 base product variants with identical logic function, electrical specifications, and 20-DIP package geometry. Pin-for-pin compatibility is assured.

Q: What is the significance of the 2ns propagation delay difference?

A: The DM74ALS533N specifies 4ns propagation delay while the SN74ALS533AN specifies 6ns. This variance falls within normal manufacturing tolerances for 74ALS logic devices and does not affect functional operation in latch applications where propagation delay is not a critical timing parameter.

Q: Why is product status important for component selection?

A: The DM74ALS533N is classified as obsolete, indicating discontinued manufacturing and limited inventory availability. The SN74ALS533AN is active production, ensuring reliable procurement for current and future applications.

Q: Are there packaging or mounting differences between these parts?

A: No. Both components use identical 20-DIP (0.300", 7.62mm) through-hole packaging. PCB layout and assembly processes require no modification.

Q: What compliance certifications apply to the SN74ALS533AN?

A: The SN74ALS533AN is ROHS3 compliant and REACH unaffected, meeting current environmental regulations for component procurement and system deployment.