74ACT823MTCX Equivalent & Substitute Parts

Part Overview

The 74ACT823MTCX is a single-element D-type flip-flop with 9-bit configuration in a 24-TSSOP surface mount package, manufactured by onsemi. This logic component features tri-state, non-inverted outputs and master reset functionality, operating at a clock frequency of 158 MHz with a maximum propagation delay of 9.5ns at 5V and 50pF load.

The 74ACT823MTCX is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this component.

Substiute Parts

74ACT823MTCX

onsemiIn Stock: 104774ACT823MTCX Datasheet

Current PartRFQ

SN74LVC823APWR

Texas InstrumentsIn Stock: 3398SN74LVC823APWR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ACT823MTCX is determined by strict alignment of the following critical parameters:

• Functional equivalence: D-type flip-flop with 1 element, 9-bit configuration, master reset function, and positive edge trigger
• Output characteristics: Tri-state, non-inverted outputs with matching current ratings (24mA high and low)
• Package compatibility: 24-TSSOP surface mount package with identical physical dimensions (0.173", 4.40mm width)
• Electrical interface: Pin-compatible configuration supporting the same logic family interface requirements
• Environmental specifications: Operating temperature range of -40°C ~ 85°C and MSL rating of 1

The SN74LVC823APWR from Texas Instruments meets these substitution criteria. While the 74LVC series operates at a lower supply voltage range (1.65V ~ 3.6V versus 4.5V ~ 5.5V for the 74ACT), it maintains functional and package equivalence, making it suitable for applications where voltage compatibility can be accommodated.

Parameter Comparison

Engineering Selection Recommendations

The SN74LVC823APWR is the primary substitute for the obsolete 74ACT823MTCX. Selection of this substitute is supported by the following factors:

• Active product status: The SN74LVC823APWR is currently in active production by Texas Instruments, ensuring long-term availability and supply chain stability compared to the obsolete 74ACT823MTCX.
• Regulatory compliance: The SN74LVC823APWR carries ROHS3 compliance certification, meeting current environmental and regulatory requirements for new designs and production.
• Functional equivalence: Both parts maintain identical D-type flip-flop architecture, 9-bit configuration, tri-state output characteristics, and 24-TSSOP package specifications.
• Environmental certification: Both parts maintain REACH Unaffected status and MSL rating of 1, ensuring compatibility with standard handling and storage protocols.

Design integration of the SN74LVC823APWR requires verification that the lower supply voltage range (1.65V ~ 3.6V) and reduced quiescent current (10 µA versus 80 µA) are compatible with the target system's power distribution and voltage regulation architecture.

Frequently Asked Questions (FAQ)

Q: Can the SN74LVC823APWR directly replace the 74ACT823MTCX in existing designs?

A: Pin-level and package compatibility is maintained. However, the SN74LVC823APWR operates at a lower supply voltage range (1.65V ~ 3.6V) compared to the 74ACT823MTCX (4.5V ~ 5.5V). Direct substitution requires confirmation that the system power supply can accommodate the 74LVC voltage specifications.

Q: What are the key differences between the 74ACT and 74LVC series?

A: The 74ACT series operates at 5V logic levels with higher quiescent current consumption (80 µA). The 74LVC series operates at lower voltage levels (1.65V ~ 3.6V) with significantly reduced quiescent current (10 µA), making it suitable for low-power applications. Both maintain equivalent functional performance and package compatibility.

Q: Are there any performance differences in clock frequency or propagation delay?

A: The 74ACT823MTCX operates at 158 MHz with a maximum propagation delay of 9.5ns at 5V and 50pF load. The SN74LVC823APWR operates at 150 MHz with a maximum propagation delay of 8ns at 3.3V and 50pF load. Both specifications support high-speed logic applications within their respective voltage domains.

Q: Is the 24-TSSOP package identical between both parts?

A: Yes. Both the 74ACT823MTCX and SN74LVC823APWR use the 24-TSSOP package with identical physical dimensions (0.173", 4.40mm width). PCB layout and footprint compatibility is maintained.

Q: What is the moisture sensitivity level for both parts?

A: Both parts carry an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage protocols apply.