74HCT563D,652 Equivalent & Substitute Parts

Part Overview

The 74HCT563D,652 is a D-Type Transparent Latch IC manufactured by NXP USA Inc., configured as a 1 Channel 1:8 logic device with tri-state output capability. This component operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC surface mount package. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

74HCT563D,652

NXP USA Inc.In Stock: 78574HCT563D,652 Datasheet

Current PartRFQ

CD74HCT563M

Harris CorporationIn Stock: 1711CD74HCT563M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HCT563D,652 is determined by the following critical parameters:

• Logic Type: Must be D-Type Transparent Latch
• Output Type: Must be Tri-State
• Supply Voltage Range: Must support 4.5V ~ 5.5V operation
• Package / Case: Must be 20-SOIC form factor
• Mounting Type: Must be Surface Mount
• Base Product Series: 74HCT series compatibility

The CD74HCT563M qualifies as a direct substitute based on these parameters. While the circuit configuration differs (8:8 versus 1:8), both devices share the same base product number (74HCT563), identical package specifications, matching supply voltage requirements, and equivalent tri-state output architecture. The difference in circuit configuration reflects internal channel organization rather than functional incompatibility at the system interface level.

Parameter Comparison

Engineering Selection Recommendations

Both the 74HCT563D,652 and CD74HCT563M are classified as obsolete products. Selection between these parts should be based on the following compliance and certification factors:

• RoHS Compliance: The 74HCT563D,652 is ROHS3 compliant, while the CD74HCT563M is RoHS non-compliant. Applications subject to RoHS regulatory requirements must use the 74HCT563D,652.
• REACH Status: Both parts are REACH unaffected.
• Temperature Range: The CD74HCT563M provides an extended lower operating temperature limit (-55°C versus -40°C), suitable for applications requiring enhanced cold-temperature performance.
• Propagation Delay: The CD74HCT563M exhibits faster propagation delay (12ns versus 18ns), beneficial for timing-critical applications.

For systems with RoHS compliance mandates, the 74HCT563D,652 is the required selection. For applications prioritizing extended temperature range or reduced propagation delay without RoHS constraints, the CD74HCT563M is applicable.

Frequently Asked Questions (FAQ)

Q: Can the CD74HCT563M directly replace the 74HCT563D,652 in all applications?

A: Direct replacement is possible from a functional and electrical standpoint, provided RoHS compliance is not a system requirement. Both devices share identical supply voltage specifications, output current ratings, package form factor, and tri-state output architecture. The circuit configuration difference (8:8 versus 1:8) does not affect pin-level compatibility or signal interface requirements.

Q: What does the circuit configuration difference (1:8 versus 8:8) mean for substitution?

A: Circuit configuration refers to the internal channel organization of the latch structure. Both configurations deliver the same functional output at the device pins. The 1:8 designation indicates one independent circuit with eight output channels, while 8:8 indicates eight independent circuits with eight output channels each. For applications using the 74HCT563D,652, the CD74HCT563M provides equivalent functionality at the system interface level.

Q: Why is RoHS compliance important for this substitution?

A: RoHS (Restriction of Hazardous Substances) compliance is a regulatory requirement in many markets and industries. The 74HCT563D,652 meets ROHS3 standards, while the CD74HCT563M does not. Applications subject to RoHS directives must use compliant components. Non-compliant substitutes are not acceptable in regulated environments.

Q: Does the faster propagation delay of the CD74HCT563M affect compatibility?

A: Faster propagation delay (12ns versus 18ns) is a performance advantage and does not create compatibility issues. Systems designed for the 74HCT563D,652 will function correctly with the CD74HCT563M. The substitute's faster response time may improve overall system timing performance without introducing functional conflicts.

Q: Are both parts available in the same package?

A: Yes. Both the 74HCT563D,652 and CD74HCT563M are housed in the 20-SOIC (0.295", 7.50mm Width) surface mount package. Pin count, spacing, and mechanical dimensions are identical, enabling direct PCB-level substitution without layout modifications.