SN74ACT534DBRG4 Equivalent & Substitute Parts

Part Overview

The SN74ACT534DBRG4 is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit parallel data storage capability. This device operates as a standard positive edge-triggered flip-flop with tri-state inverted outputs, designed for high-speed digital logic applications requiring synchronous data capture and storage.

The SN74ACT534DBRG4 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this logic function.

Substiute Parts

SN74ACT534DBRG4

Texas InstrumentsIn Stock: 985SN74ACT534DBRG4 Datasheet

Current PartRFQ

MC74ACT374DTR2G

onsemiIn Stock: 3521MC74ACT374DTR2G Datasheet

MFR RecommendedRFQ

MC74ACT574DTR2G

onsemiIn Stock: 3575MC74ACT574DTR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74ACT534DBRG4 are selected based on the following critical parameters that determine functional compatibility:

Core Functional Parameters:

• Series: 74ACT logic family
• Type: D-Type flip-flop
• Number of Elements: 1
• Number of Bits per Element: 8
• Trigger Type: Positive Edge
• Voltage Supply Range: 4.5V ~ 5.5V
• Operating Temperature: -40°C ~ 85°C

Electrical Performance Parameters:

• Clock Frequency: minimum 100 MHz
• Max Propagation Delay: 11.5 ns or better @ 5V, 50pF
• Current Output High/Low: 24 mA minimum
• Quiescent Current: within specified range

Physical Parameters:

• Mounting Type: Surface Mount
• Package Type: 20-pin SSOP or TSSOP variants

The substitute parts identified maintain compatibility across these critical parameters while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

MC74ACT374DTR2G (onsemi)

This substitute offers active product status with improved clock frequency performance (160 MHz versus 100 MHz) and faster propagation delay (10 ns versus 11.5 ns). The device maintains full electrical compatibility with supply voltage, output current, and operating temperature specifications. Package transition from 20-SSOP to 20-TSSOP requires PCB layout adjustment due to reduced body width (4.40mm versus 5.30mm). Both devices maintain ROHS3 compliance and unlimited moisture sensitivity rating. Quiescent current increases from 4 µA to 8 µA. Output polarity differs: MC74ACT374DTR2G provides non-inverted outputs compared to the inverted outputs of SN74ACT534DBRG4, requiring circuit logic verification.

MC74ACT574DTR2G (onsemi)

This substitute maintains clock frequency and propagation delay specifications matching the original device (100 MHz, 11 ns). Active product status ensures long-term availability. Electrical parameters remain compatible across supply voltage, output current, and operating temperature ranges. Package transition from 20-SSOP to 20-TSSOP requires PCB layout adjustment. ROHS3 compliance and unlimited moisture sensitivity rating are maintained. Quiescent current increases from 4 µA to 8 µA. Output polarity differs: MC74ACT574DTR2G provides non-inverted outputs, requiring circuit logic verification against the inverted outputs of the original device.

Frequently Asked Questions (FAQ)

Q: What is the primary reason for substituting the SN74ACT534DBRG4?

A: The SN74ACT534DBRG4 is classified as obsolete. Substitute parts ensure continued supply chain access and support for ongoing production requirements.

Q: Are the substitute parts pin-compatible with the original SN74ACT534DBRG4?

A: Both substitute parts maintain the same 20-pin configuration and pin assignment as the original device, ensuring functional pin compatibility. However, package body dimensions differ between SSOP and TSSOP variants, requiring PCB layout verification.

Q: What is the difference between the two substitute parts?

A: MC74ACT374DTR2G offers higher clock frequency (160 MHz) and faster propagation delay (10 ns). MC74ACT574DTR2G matches the original clock frequency (100 MHz) and propagation delay (11 ns). Both are manufactured by onsemi and maintain active product status.

Q: Do the substitute parts have different output polarity?

A: Yes. The original SN74ACT534DBRG4 provides tri-state inverted outputs. Both substitute parts (MC74ACT374DTR2G and MC74ACT574DTR2G) provide tri-state non-inverted outputs. Circuit logic must be verified to accommodate this output polarity difference.

Q: Are there package considerations when substituting these parts?

A: The original device uses 20-SSOP packaging (0.209" width). Both substitute parts use 20-TSSOP packaging (0.173" width). PCB footprint adjustment is required. Pin pitch and lead configuration remain compatible.

Q: Do the substitute parts maintain the same compliance certifications?

A: Yes. All parts maintain ROHS3 compliance, unlimited moisture sensitivity level (MSL 1), and REACH unaffected status. ECCN and HTSUS classifications remain identical.

Q: What is the quiescent current difference?

A: The original SN74ACT534DBRG4 specifies 4 µA quiescent current. Both substitute parts specify 8 µA quiescent current. This represents a 2x increase in standby power consumption.

Q: Can I use these parts interchangeably in my design?

A: Functional substitution requires verification of output polarity requirements (inverted versus non-inverted), PCB layout compatibility with package dimension changes, and quiescent current impact on power budget. Electrical specifications for supply voltage, operating temperature, and output current remain compatible.