SN74AC533NG4 Equivalent & Substitute Parts

Part Overview

The SN74AC533NG4 is a D-Type Transparent Latch IC with 1 channel, 8:8 configuration, and tri-state output capability. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design requirements and procurement needs. The part operates across a 2V to 6V supply voltage range with 2ns propagation delay and is housed in a 20-DIP through-hole package.

Substiute Parts

SN74AC533NG4

Texas InstrumentsIn Stock: 782SN74AC533NG4 Datasheet

Current PartRFQ

SN74AC533DW

Texas InstrumentsIn Stock: 1114SN74AC533DW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74AC533NG4 are identified based on functional equivalence within the 74AC logic family. The substitution criteria are strictly defined by the following parameters:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Voltage - Supply: 2V ~ 6V
• Propagation Delay: 2ns
• Current - Output High, Low: 24mA, 24mA
• Operating Temperature: -40°C ~ 85°C
• Base Product Number: 74AC533
• RoHS Status: ROHS3 Compliant

The primary substitute, SN74AC533DW, maintains identical electrical specifications and functional characteristics. The key difference is the package type: the substitute uses a 20-SOIC surface-mount package instead of the through-hole 20-DIP package of the original part.

Parameter Comparison

Engineering Selection Recommendations

The SN74AC533DW is the direct functional equivalent of the SN74AC533NG4. Both parts are manufactured by Texas Instruments, share identical electrical specifications, and maintain equivalent compliance certifications (ROHS3 Compliant, REACH Unaffected).

The primary distinction is packaging: the SN74AC533NG4 uses through-hole mounting (20-DIP), while the SN74AC533DW uses surface-mount technology (20-SOIC). The SN74AC533DW is currently in active production status, whereas the SN74AC533NG4 is obsolete.

Selection between these parts depends on board assembly requirements. Through-hole mounting is suitable for manual assembly or legacy PCB designs. Surface-mount packaging is appropriate for automated assembly processes and modern PCB layouts. Both parts deliver identical functional performance and meet the same environmental and compliance standards.

Frequently Asked Questions (FAQ)

Q: Can the SN74AC533DW directly replace the SN74AC533NG4 in existing designs?

A: Electrical and functional replacement is direct. Pin configuration and signal behavior are identical. Physical board integration requires accommodation of the different package types: 20-DIP (through-hole) versus 20-SOIC (surface-mount). PCB layout and assembly method must be compatible with the selected package.

Q: What is the significance of the product status difference (Obsolete vs. Active)?

A: The SN74AC533NG4 is obsolete and no longer manufactured. The SN74AC533DW is in active production. For new designs or ongoing procurement, the active part ensures long-term availability and supply chain stability.

Q: Are the electrical specifications identical between these parts?

A: Yes. Both parts operate at 2V to 6V supply voltage, deliver 2ns propagation delay, provide 24mA output current capability, and function across -40°C to 85°C operating temperature. Logic type, circuit configuration, and tri-state output characteristics are identical.

Q: What are the compliance implications of substitution?

A: Both parts maintain ROHS3 compliance and REACH Unaffected status. Substitution does not introduce compliance risk. Moisture sensitivity level (MSL 1 - Unlimited) is equivalent for both parts.

Q: How does package selection affect board design?

A: Through-hole packages (20-DIP) require drilled holes and are suitable for manual soldering or wave soldering processes. Surface-mount packages (20-SOIC) require solder pads and are compatible with reflow soldering and automated assembly. Package footprint dimensions differ: 20-DIP measures 0.300" width versus 20-SOIC at 0.295" width.