SN74ACT564DBRE4 Equivalent & Substitute Parts

Part Overview

The SN74ACT564DBRE4 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 surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The device 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

SN74ACT564DBRE4

Texas InstrumentsIn Stock: 989SN74ACT564DBRE4 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 SN74ACT564DBRE4 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, -40°C to 85°C operating temperature, and surface mount packaging. The substitute parts are grouped into two categories based on output polarity and performance characteristics:

Category 1: Direct Package Equivalent (Same Base Function) SN74ACT564PWR maintains identical electrical specifications and base product number (74ACT564) with a packaging variant change from 20-SSOP to 20-TSSOP, offering improved availability as an active product.

Category 2: Functional Alternatives (Different Output Polarity) MC74ACT374DTR2G and MC74ACT574DTR2G provide D-Type flip-flop functionality with non-inverted tri-state outputs and enhanced clock frequency performance. These parts operate within the same voltage and temperature ranges but differ in output inversion and propagation delay characteristics.

Parameter Comparison

Engineering Selection Recommendations

SN74ACT564PWR is the primary substitute for direct replacement applications. This part maintains identical electrical performance and base product specifications while offering active product status and improved long-term availability. The packaging transition from 20-SSOP to 20-TSSOP requires PCB layout verification but provides superior supply chain continuity. Both parts are ROHS3 compliant and carry equivalent environmental certifications.

MC74ACT374DTR2G and MC74ACT574DTR2G serve as functional alternatives when output polarity inversion is not required in the circuit design. MC74ACT374DTR2G offers the highest clock frequency performance at 160 MHz with marginally improved propagation delay (10 ns), while MC74ACT574DTR2G provides moderate frequency enhancement at 100 MHz with propagation delay of 11 ns. Both onsemi alternatives are active products with ROHS3 compliance. Selection between these alternatives depends on circuit requirements for output logic levels and timing margins. Quiescent current increases to 8 µA for both onsemi parts compared to 4 µA for the original device.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT564PWR be used as a direct replacement for SN74ACT564DBRE4? A: Yes. SN74ACT564PWR maintains identical electrical specifications, output polarity (inverted tri-state), and functional characteristics. The primary difference is the package variant: 20-TSSOP versus 20-SSOP. PCB layout modifications are required to accommodate the different package footprint.

Q: What is the key difference between the Texas Instruments SN74ACT564PWR and the onsemi alternatives? A: SN74ACT564PWR preserves the inverted tri-state output configuration of the original part. MC74ACT374DTR2G and MC74ACT574DTR2G feature non-inverted tri-state outputs, requiring circuit logic verification before substitution. Output polarity differences necessitate evaluation of downstream logic dependencies.

Q: Are the onsemi parts (MC74ACT374DTR2G and MC74ACT574DTR2G) pin-compatible with the original SN74ACT564DBRE4? A: All substitute parts share the same 20-pin package footprint and pinout configuration for D-Type flip-flop logic devices. Pin compatibility is maintained across all listed alternatives.

Q: What are the compliance and environmental considerations for these substitute parts? A: All substitute parts are ROHS3 compliant with REACH unaffected status. Moisture sensitivity level is 1 (unlimited) for all parts, indicating no special moisture handling requirements during storage or assembly.

Q: How do the propagation delay specifications compare across substitute options? A: SN74ACT564PWR matches the original at 10.5 ns. MC74ACT374DTR2G provides 10 ns (improved), and MC74ACT574DTR2G provides 11 ns (slightly increased). All values are measured at 5V supply with 50pF load and remain within acceptable timing margins for 74ACT series logic applications.

Q: What is the impact of increased quiescent current in the onsemi alternatives? A: MC74ACT374DTR2G and MC74ACT574DTR2G draw 8 µA quiescent current compared to 4 µA for the original and SN74ACT564PWR. This doubling of standby current consumption should be evaluated in power-sensitive applications, though the absolute current draw remains minimal for most digital logic circuits.