CD74AC563E Equivalent & Substitute Parts

Part Overview

The CD74AC563E 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-DIP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations where legacy compatibility is required.

Substiute Parts

CD74AC563E

Texas InstrumentsIn Stock: 957CD74AC563E Datasheet

Current PartRFQ

CD74AC373E

Harris CorporationIn Stock: 4077CD74AC373E Datasheet

Parametric EquivalentRFQ

CD74AC573E

Harris CorporationIn Stock: 1679CD74AC573E Datasheet

Parametric EquivalentRFQ

SN74AC563N

Texas InstrumentsIn Stock: 1210SN74AC563N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74AC563E are classified based on strict electrical and mechanical parameter alignment:

Parametric Equivalents maintain identical or compatible specifications across all critical parameters: logic type (D-Type Transparent Latch), circuit configuration (8:8), output type (tri-state), supply voltage range (1.5V ~ 5.5V), propagation delay (3ns), output current (24mA), operating temperature range (-55°C ~ 125°C), and package format (20-DIP). These parts are direct functional replacements.

Manufacturer Recommended Substitute (SN74AC563N) shares the same base product number (74AC563) and identical logic architecture but operates within a narrower supply voltage range (2V ~ 6V), exhibits slightly longer propagation delay (4.6ns), and supports a reduced operating temperature range (-40°C ~ 85°C). This part is actively manufactured and maintains full RoHS3 compliance.

Substitution eligibility is determined by matching: logic type, circuit configuration, output type, package/case format, and compatibility within the specified electrical operating ranges.

Parameter Comparison

Engineering Selection Recommendations

CD74AC373E and CD74AC573E are parametric equivalents offering identical electrical performance to the CD74AC563E across all critical specifications. However, both parts are obsolete and do not meet current RoHS3 compliance requirements. These substitutes are suitable only for legacy system repairs or applications where RoHS compliance is not mandated.

SN74AC563N is the manufacturer-recommended substitute, manufactured by Texas Instruments and actively produced. This part maintains ROHS3 compliance and shares the same base product number (74AC563) as the original component. The SN74AC563N operates within a slightly narrower supply voltage range (2V ~ 6V versus 1.5V ~ 5.5V) and supports a reduced operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C). Propagation delay is marginally longer at 4.6ns compared to 3ns. Selection of SN74AC563N is appropriate for new designs, system upgrades, and applications requiring current manufacturing status and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can CD74AC373E or CD74AC573E be used as direct replacements for CD74AC563E?

A: Yes, CD74AC373E and CD74AC573E are parametric equivalents with identical electrical specifications. Both maintain the same supply voltage range (1.5V ~ 5.5V), propagation delay (3ns), output current (24mA), and operating temperature range (-55°C ~ 125°C). However, both are obsolete and non-compliant with RoHS3 standards.

Q: What are the key differences between CD74AC563E and SN74AC563N?

A: Both parts share identical logic architecture and package format. SN74AC563N operates within a narrower supply voltage range (2V ~ 6V), exhibits longer propagation delay (4.6ns), and supports a reduced operating temperature range (-40°C ~ 85°C). SN74AC563N is actively manufactured and RoHS3 compliant, whereas CD74AC563E is obsolete.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All substitute parts use the 20-DIP (0.300", 7.62mm) package format with identical pin configuration, ensuring mechanical and electrical compatibility on existing through-hole PCB layouts.

Q: Which substitute should be selected for new product designs?

A: SN74AC563N is the appropriate choice for new designs. It is actively manufactured, maintains RoHS3 compliance, and is recommended by the original manufacturer. Verify that the narrower supply voltage range (2V ~ 6V) and reduced operating temperature range (-40°C ~ 85°C) are compatible with your application requirements.

Q: Can SN74AC563N be used in applications requiring the full -55°C ~ 125°C operating temperature range?

A: No. SN74AC563N supports only -40°C ~ 85°C. Applications requiring the extended temperature range of the original CD74AC563E must use CD74AC373E or CD74AC573E, with consideration for their obsolete status and non-compliance with RoHS3 standards.

Q: What is the significance of the RoHS compliance difference?

A: RoHS3 compliance indicates adherence to current environmental and hazardous substance restrictions. CD74AC563E and SN74AC563N are RoHS3 compliant, while CD74AC373E and CD74AC573E are not. RoHS compliance is mandatory for products sold in regulated markets and for many OEM supply chains.