74HC564D,653 Equivalent & Substitute Parts

Part Overview

The 74HC564D,653 is a D-Type flip-flop logic integrated circuit manufactured by NXP USA Inc., featuring 1 element with 8-bit positive edge triggering and tri-state inverted output. This component operates across a 2V to 6V supply range with a maximum propagation delay of 28ns at 6V with 50pF load. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

74HC564D,653

NXP USA Inc.In Stock: 111374HC564D,653 Datasheet

Current PartRFQ

CD74HC564M96

Texas InstrumentsIn Stock: 1297CD74HC564M96 Datasheet

DirectRFQ

SN74HC574DWR

Texas InstrumentsIn Stock: 3776SN74HC574DWR Datasheet

DirectRFQ

CD74HC564M

Texas InstrumentsIn Stock: 1446CD74HC564M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HC564D,653 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Type: D-Type flip-flop with 1 element, 8-bit configuration
• Trigger Type: Positive edge triggering
• Output Type: Tri-state output (inverted configuration preferred for direct replacement)
• Package: 20-SOIC form factor
• Voltage Supply Range: 2V ~ 6V minimum compatibility
• Propagation Delay: Maximum 28ns @ 6V, 50pF load
• Current Output: 7.8mA high and low
• Quiescent Current: 8 µA
• RoHS Compliance: ROHS3 Compliant

Substitute Parts Identified:

1. CD74HC564M96 (Texas Instruments) - Direct functional equivalent with tape & reel packaging
2. CD74HC564M (Texas Instruments) - Manufacturer-recommended substitute with tube packaging
3. SN74HC574DWR (Texas Instruments) - Compatible alternative with non-inverted output configuration

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: CD74HC564M or CD74HC564M96

Both CD74HC564M and CD74HC564M96 are direct functional equivalents to the 74HC564D,653. These Texas Instruments parts maintain identical electrical specifications including tri-state inverted output, 28ns propagation delay, and full voltage/current compatibility. Both are active products with ROHS3 compliance and extended operating temperature ranges (-55°C to 125°C), providing superior temperature performance compared to the original obsolete part. Selection between these two depends on packaging requirements: CD74HC564M96 is supplied in tape & reel format for automated assembly, while CD74HC564M is supplied in tube packaging for manual handling.

Secondary Recommendation: SN74HC574DWR

The SN74HC574DWR is a compatible alternative when output polarity inversion is not a circuit requirement. This part shares identical mechanical packaging, voltage supply range, and quiescent current specifications. However, it features non-inverted tri-state output and operates within a narrower temperature range (-40°C to 85°C). The propagation delay specification differs at 46ns versus 28ns, which may impact timing-critical applications. This substitute is suitable only when circuit design accommodates the output polarity difference and timing margin exists.

Compliance Status

All identified substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity for production and distribution.

Frequently Asked Questions (FAQ)

Q: Can CD74HC564M96 directly replace 74HC564D,653 without circuit modification?

A: Yes. CD74HC564M96 is a direct functional equivalent with identical electrical specifications, package form factor, and output polarity. No circuit modification is required.

Q: What is the difference between CD74HC564M and CD74HC564M96?

A: Both parts are electrically identical. The difference is packaging: CD74HC564M is supplied in tube format, while CD74HC564M96 is supplied in tape & reel format. Selection depends on assembly process requirements.

Q: Why does SN74HC574DWR have different propagation delay specifications?

A: SN74HC574DWR is a different base product (74HC574 versus 74HC564) with non-inverted output configuration. The propagation delay specification of 46ns at 6V with 150pF load reflects different internal circuit topology. This part is compatible only when output inversion is not required and timing margins accommodate the longer delay.

Q: Are all substitute parts RoHS compliant?

A: Yes. All identified substitutes (CD74HC564M96, CD74HC564M, and SN74HC574DWR) are ROHS3 compliant with REACH unaffected status.

Q: What is the operating temperature difference between the original part and substitutes?

A: The 74HC564D,653 operates from -40°C to 125°C. CD74HC564M and CD74HC564M96 extend the lower temperature limit to -55°C, providing wider temperature coverage. SN74HC574DWR is limited to -40°C to 85°C, a narrower range.

Q: Can I use SN74HC574DWR as a direct replacement?

A: SN74HC574DWR is mechanically and electrically compatible in terms of package, voltage supply, and current specifications. However, it features non-inverted output versus the inverted output of the original part. Use this substitute only if your circuit design does not depend on output inversion and timing margins accommodate the 46ns propagation delay.

Q: What inventory status should I expect for these substitutes?

A: CD74HC564M96 has 1257 pieces in stock, CD74HC564M has 1379 pieces in stock, and SN74HC574DWR has 3765 pieces in stock, all listed as new original inventory.