74HC564N,652 Equivalent & Substitute Parts

Part Overview

The 74HC564N,652 is a D-Type flip-flop logic integrated circuit manufactured by NXP USA Inc., designed for 8-bit positive edge-triggered applications. This component features tri-state inverted outputs and operates across a 2V to 6V supply voltage range. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance, legacy design support, and component procurement.

Substiute Parts

74HC564N,652

NXP USA Inc.In Stock: 101474HC564N,652 Datasheet

Current PartRFQ

CD74HC564E

Harris CorporationIn Stock: 10469CD74HC564E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HC564N,652 is determined by the following critical parameters:

• Logic Function: D-Type flip-flop with 8-bit configuration, single element, positive edge trigger
• Output Configuration: Tri-state, inverted outputs
• Electrical Performance: 28 ns maximum propagation delay at 6V with 50 pF load
• Supply Voltage Range: 2V to 6V operation
• Output Drive Capability: 7.8 mA source and sink current
• Package Compatibility: 20-DIP (0.300", 7.62mm) through-hole mounting
• Thermal Range: -40°C to 125°C operating temperature

The CD74HC564E, manufactured by Harris Corporation, meets all functional and electrical requirements for direct substitution. Both parts share identical logic architecture, output configuration, propagation delay specifications, supply voltage range, output current ratings, and package form factor. Compatibility is confirmed across all critical selection parameters.

Parameter Comparison

Engineering Selection Recommendations

The CD74HC564E represents a direct functional equivalent for the 74HC564N,652. Selection between these parts should be based on the following factors:

Product Status Consideration: Both parts are classified as obsolete. Component availability through authorized distributors should be verified prior to procurement.

Compliance and Certification: The 74HC564N,652 carries ROHS3 compliance certification, while the CD74HC564E is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the NXP part maintains compliance advantage. For legacy systems without RoHS mandates, the Harris part remains functionally suitable.

Operating Temperature Range: The CD74HC564E extends the lower operating temperature limit to -55°C compared to the NXP part's -40°C minimum. This provides additional thermal margin for applications requiring extended low-temperature operation.

Electrical Performance: Both parts deliver identical propagation delay, output drive capability, quiescent current, and supply voltage specifications. No performance differentiation exists for standard operating conditions.

Package and Mounting: Both parts utilize identical 20-DIP through-hole packaging, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC564E directly replace the 74HC564N,652 on existing PCBs?

A: Yes. Both parts share identical 20-DIP package dimensions and pinout. No PCB modifications are required for physical substitution. Electrical performance is equivalent across all specified parameters.

Q: What are the key differences between these parts?

A: The primary differences are manufacturer (NXP vs. Harris), RoHS compliance status (ROHS3 vs. non-compliant), and operating temperature range (-40°C to 125°C vs. -55°C to 125°C). Functional logic, output configuration, propagation delay, and electrical drive characteristics are identical.

Q: Which part should be selected for new designs?

A: Both parts are obsolete. For new designs, current-production equivalents within the 74HC logic family should be evaluated. However, if legacy component compatibility is required, either part meets the functional specification.

Q: Does RoHS compliance matter for my application?

A: RoHS compliance is mandatory for products sold in the European Union and for many industrial applications. If your system is subject to RoHS regulations, the 74HC564N,652 (ROHS3 compliant) is the appropriate selection. For non-regulated applications, the CD74HC564E is functionally equivalent.

Q: Are there any input capacitance differences I should consider?

A: The 74HC564N,652 specifies 3.5 pF input capacitance, while the CD74HC564E specifies 10 pF. This difference may affect circuit timing in applications with very tight timing margins or high-frequency clock signals. For standard applications, this difference is not significant.

Q: What is the clock frequency specification used for?

A: Clock frequency indicates the maximum rate at which the flip-flop can reliably capture and store data. The 74HC564N,652 supports 137 MHz operation, while the CD74HC564E supports 60 MHz. Both exceed typical industrial and consumer application requirements. The NXP part provides additional frequency margin for high-speed applications.