SN74ACT564DBRG4 Equivalent & Substitute Parts

Part Overview

The SN74ACT564DBRG4 is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit positive edge triggering in a 20-SSOP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part operates at 90 MHz clock frequency with tri-state inverted outputs, suitable for digital logic applications requiring edge-triggered storage and output control.

Substiute Parts

SN74ACT564DBRG4

Texas InstrumentsIn Stock: 952SN74ACT564DBRG4 Datasheet

Current PartRFQ

SN74ACT564PWR

Texas InstrumentsIn Stock: 2728SN74ACT564PWR Datasheet

MFR RecommendedRFQ

MC74ACT374DTR2G

onsemiIn Stock: 3521MC74ACT374DTR2G Datasheet

MFR RecommendedRFQ

MC74ACT574DTR2G

onsemiIn Stock: 3575MC74ACT574DTR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74ACT564DBRG4 is determined by the following critical parameters: D-Type flip-flop architecture, 8-bit configuration, positive edge triggering, tri-state output capability, 4.5V to 5.5V supply voltage range, and -40°C to 85°C operating temperature. The 74ACT logic family compatibility and surface mount technology are mandatory for functional equivalence.

Two substitution categories exist:

Direct Package Equivalent: SN74ACT564PWR maintains identical electrical specifications and base product number (74ACT564) with a different package format (20-TSSOP instead of 20-SSOP). This substitute provides the same inverted tri-state output configuration.

Functional Alternatives with Output Polarity Difference: MC74ACT374DTR2G and MC74ACT574DTR2G are D-Type flip-flops with 8-bit configuration and tri-state outputs, but feature non-inverted output polarity. These parts operate within the same voltage and temperature ranges with compatible clock frequencies and propagation delays, though they use different base product numbers (74ACT374 and 74ACT574 respectively).

Parameter Comparison

Engineering Selection Recommendations

SN74ACT564PWR is the primary substitute for direct replacement. It maintains identical electrical performance, output polarity (inverted tri-state), and quiescent current specifications. The only difference is the package format transition from 20-SSOP to 20-TSSOP, which requires PCB layout adjustment but provides superior thermal characteristics and improved manufacturing availability. This part carries Active product status and ROHS3 compliance.

MC74ACT374DTR2G and MC74ACT574DTR2G are functional alternatives when output polarity inversion is acceptable or can be accommodated in circuit design. Both parts are manufactured by onsemi with Active product status and ROHS3 compliance. MC74ACT374DTR2G offers higher clock frequency (160 MHz) and faster propagation delay (10 ns), while MC74ACT574DTR2G provides intermediate performance (100 MHz, 11 ns propagation delay). Both alternatives exhibit higher quiescent current (8 µA) compared to the original specification (4 µA).

Selection between these alternatives depends on circuit requirements for output polarity, clock frequency headroom, and power consumption constraints.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT564PWR be used as a direct replacement for SN74ACT564DBRG4?

A: Yes. SN74ACT564PWR is electrically equivalent with identical output polarity (inverted tri-state), clock frequency (90 MHz), propagation delay (10.5 ns), and quiescent current (4 µA). The package changes from 20-SSOP to 20-TSSOP, requiring PCB footprint modification but maintaining functional compatibility.

Q: What is the key difference between SN74ACT564PWR and MC74ACT374DTR2G?

A: The primary difference is output polarity. SN74ACT564PWR provides inverted tri-state outputs matching the original part, while MC74ACT374DTR2G provides non-inverted tri-state outputs. Additionally, MC74ACT374DTR2G operates at 160 MHz with 10 ns propagation delay and 8 µA quiescent current, compared to 90 MHz, 10.5 ns, and 4 µA respectively for SN74ACT564PWR.

Q: Are MC74ACT374DTR2G and MC74ACT574DTR2G interchangeable?

A: Both are 8-bit D-Type flip-flops with tri-state non-inverted outputs and compatible supply voltage and temperature ranges. MC74ACT374DTR2G operates at 160 MHz with 10 ns propagation delay, while MC74ACT574DTR2G operates at 100 MHz with 11 ns propagation delay. Selection depends on required clock frequency performance and quiescent current tolerance (both at 8 µA).

Q: Do all substitute parts meet RoHS and REACH compliance?

A: Yes. SN74ACT564PWR, MC74ACT374DTR2G, and MC74ACT574DTR2G are all ROHS3 compliant and REACH unaffected, matching the compliance status of the original SN74ACT564DBRG4.

Q: What is the impact of package change from 20-SSOP to 20-TSSOP?

A: The 20-TSSOP package is narrower (0.173" vs 0.209" width) and thinner, improving thermal performance and reducing board space. PCB footprint and assembly process require adjustment, but electrical functionality remains identical. Both packages are surface mount with equivalent pin configurations for the 74ACT564 base product.