SN74AC564DBR Equivalent & Substitute Parts

Part Overview

The SN74AC564DBR is an active-status D-type flip-flop logic integrated circuit manufactured by Texas Instruments, configured as a single 8-bit element with positive edge triggering and tri-state inverted output. This component operates across a 2V to 6V supply range with a maximum propagation delay of 10.5ns at 5V with 50pF load, making it suitable for digital logic applications requiring edge-triggered data storage and output control.

Substitute parts are identified when equivalent functional performance can be maintained within the allowed electrical and mechanical parameters of the 74AC logic family, considering variations in output configuration, propagation delay, clock frequency, and packaging format.

Substiute Parts

SN74AC564DBR

Texas InstrumentsIn Stock: 1148SN74AC564DBR Datasheet

Current PartRFQ

MC74AC374DTR2G

onsemiIn Stock: 3574MC74AC374DTR2G Datasheet

MFR RecommendedRFQ

MC74AC377DTG

onsemiIn Stock: 782MC74AC377DTG Datasheet

MFR RecommendedRFQ

MC74AC377DTR2G

onsemiIn Stock: 3640MC74AC377DTR2G Datasheet

MFR RecommendedRFQ

MC74AC574DTR2G

onsemiIn Stock: 17818MC74AC574DTR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74AC564DBR are identified based on the following criteria:

Functional Equivalence Parameters:

• D-Type flip-flop architecture with 1 element and 8 bits per element
• Positive edge trigger configuration
• 74AC logic family membership
• Tri-state output capability
• Supply voltage range 2V ~ 6V
• Output drive capability of 24mA high and low
• Operating temperature range -40°C ~ 85°C
• Surface mount technology

Allowable Variations:

• Output polarity (inverted vs. non-inverted) within tri-state configurations
• Clock frequency (minimum 95 MHz acceptable)
• Propagation delay (maximum 10.5ns at 5V, 50pF acceptable)
• Package format (20-SSOP, 20-TSSOP acceptable)
• Packaging type (Tape & Reel, Cut Tape, Tube acceptable)
• Quiescent current (up to 8 µA acceptable)
• Manufacturer (Texas Instruments, onsemi acceptable)

The identified substitutes maintain core functional parameters while accommodating package and performance variations within the 74AC logic family specification.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active product status and ROHS3 compliance with unlimited moisture sensitivity rating, ensuring regulatory and environmental compatibility with the SN74AC564DBR.

MC74AC374DTR2G and MC74AC574DTR2G provide tri-state output configurations with improved propagation delay performance (9.5ns) and higher clock frequency ratings (155 MHz and 95 MHz respectively), while operating within the same supply voltage and output drive specifications. These parts are available in 20-TSSOP packaging with Tape & Reel delivery format.

MC74AC377DTG and MC74AC377DTR2G offer non-inverted output configuration with equivalent propagation delay (10ns) and higher clock frequency (140 MHz), available in 20-TSSOP packaging. The DTG variant is supplied in Tube format, while the DTR2G variant is supplied in Tape & Reel format.

Package format differences between 20-SSOP (0.209" width) and 20-TSSOP (0.173" width) require PCB layout verification for pin pitch and thermal management compatibility. All substitutes maintain identical pin count, supply voltage range, output drive capability, and operating temperature specifications.

Frequently Asked Questions (FAQ)

Q: Can MC74AC374DTR2G replace SN74AC564DBR directly?

A: MC74AC374DTR2G is functionally equivalent within the 74AC logic family, maintaining 8-bit D-type flip-flop architecture, positive edge triggering, tri-state output, 24mA drive capability, and -40°C to 85°C operating range. The primary differences are output polarity (non-inverted vs. inverted), improved propagation delay (9.5ns vs. 10.5ns), and package format (20-TSSOP vs. 20-SSOP). PCB layout must accommodate the narrower 20-TSSOP package width (0.173" vs. 0.209").

Q: What is the difference between MC74AC377DTG and MC74AC377DTR2G?

A: Both parts are identical in electrical specifications and package type (20-TSSOP). The difference is packaging format: MC74AC377DTG is supplied in Tube format, while MC74AC377DTR2G is supplied in Tape & Reel format. Selection depends on assembly process requirements and inventory management.

Q: Are the non-inverted output substitutes compatible with inverted output applications?

A: Output polarity is a functional characteristic that affects logic state interpretation. MC74AC374DTR2G, MC74AC377DTG, MC74AC377DTR2G, and MC74AC574DTR2G provide non-inverted outputs, while SN74AC564DBR provides inverted output. Circuit design must account for this polarity difference; direct substitution without logic adjustment is not compatible.

Q: What are the package compatibility considerations?

A: SN74AC564DBR uses 20-SSOP packaging (0.209" width), while all substitute parts use 20-TSSOP packaging (0.173" width). Both are surface mount packages with identical pin count and pitch. PCB footprint, trace routing, and thermal management must be verified for the narrower TSSOP package before substitution.

Q: Do all substitute parts meet the same compliance standards?

A: All identified substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the SN74AC564DBR compliance profile. REACH status is unaffected for all parts, and ECCN classification is EAR99 across all variants.

Q: What is the quiescent current difference between the main part and substitutes?

A: SN74AC564DBR has a quiescent current of 4 µA, while all substitute parts (MC74AC374DTR2G, MC74AC377DTG, MC74AC377DTR2G, MC74AC574DTR2G) have a quiescent current of 8 µA. This 2x difference may be significant in low-power or battery-operated applications requiring extended runtime.