SN74ACT573PW Equivalent & Substitute Parts

Part Overview

The SN74ACT573PW is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, featuring an 8:8 circuit configuration with tri-state output capability in a 20-TSSOP surface mount package. This component is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design requirements and production continuity. The part operates within a 4.5V to 5.5V supply voltage range with a 6ns propagation delay and supports output currents of 24mA in both high and low states.

Substiute Parts

SN74ACT573PW

Texas InstrumentsIn Stock: 2147SN74ACT573PW Datasheet

Current PartRFQ

SN74ACT573PWR

Texas InstrumentsIn Stock: 10256SN74ACT573PWR Datasheet

DirectRFQ

MC74ACT573DTR2G

onsemiIn Stock: 3144MC74ACT573DTR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ACT573PW is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

• Logic Type: D-Type Transparent Latch
• Output Type: Tri-State
• Voltage - Supply: 4.5V ~ 5.5V
• Package / Case: 20-TSSOP (0.173", 4.40mm Width)
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Current - Output High, Low: 24mA, 24mA
• RoHS Status: ROHS3 Compliant

Acceptable Variation Parameters:

• Circuit Configuration: 8:8 or 1:8 (both represent single channel latch configurations)
• Delay Time - Propagation: Up to 10.5ns (within acceptable timing margins for latch applications)
• Packaging Format: Tube, Cut Tape (CT) & Digi-Reel®, or Tape & Reel (TR)
• Product Status: Active or Discontinued (availability does not affect functional equivalence)

Parameter Comparison

Engineering Selection Recommendations

SN74ACT573PWR (Texas Instruments): This part is the direct functional equivalent of the SN74ACT573PW with identical electrical specifications and timing characteristics. The primary distinction is product status—SN74ACT573PWR maintains active availability. Both parts share the same base product number (74ACT573), identical propagation delay (6ns), and equivalent circuit configuration (8:8). This substitute is recommended as the primary replacement due to matching performance parameters and continued manufacturer support.

MC74ACT573DTR2G (onsemi): This part meets all critical substitution criteria with equivalent supply voltage, output current, operating temperature range, and package form factor. The circuit configuration differs (1:8 versus 8:8), and propagation delay extends to 10.5ns compared to 6ns in the original part. Both differences remain within acceptable operational margins for D-Type Transparent Latch applications. This substitute is suitable where timing tolerance permits the extended propagation delay and circuit configuration variation is compatible with system requirements. The part maintains ROHS3 compliance and active product status.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT573PWR be used as a direct replacement for SN74ACT573PW?

A: Yes. SN74ACT573PWR is functionally equivalent with identical electrical specifications, timing characteristics, and package configuration. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tube) and active product status versus discontinued status.

Q: What is the significance of the circuit configuration difference between 8:8 and 1:8?

A: Both configurations represent single-channel D-Type Transparent Latch implementations. The notation indicates input-to-output bit relationships. Both are compatible with applications requiring D-Type Transparent Latch functionality within the specified voltage and current parameters.

Q: Is the 10.5ns propagation delay of MC74ACT573DTR2G acceptable as a substitute?

A: Propagation delay acceptance depends on system timing requirements. The MC74ACT573DTR2G introduces a 4.5ns delay increase relative to the original 6ns specification. This substitute is suitable for applications where timing margins accommodate this extended delay. Critical timing-sensitive applications should verify compatibility with system specifications.

Q: Are all three parts pin-compatible?

A: All three parts use the 20-TSSOP package with identical physical dimensions (0.173", 4.40mm Width) and surface mount mounting type. Pin compatibility is confirmed for all substitute relationships.

Q: What compliance certifications apply to these substitute parts?

A: All parts maintain ROHS3 compliance, REACH Unaffected status, and identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no moisture sensitivity constraints.