74ACT563SCX Equivalent & Substitute Parts

Part Overview

The 74ACT563SCX is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring 1 channel with 8:8 circuit configuration and tri-state output capability. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. The 20-SOIC surface mount package and 4.5V to 5.5V supply voltage range define its operational parameters within standard TTL-compatible logic applications.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Supply Voltage Range	4.5V ~ 5.5V
Independent Circuits	1
Propagation Delay	7ns
Output Current (High/Low)	24mA / 24mA
Operating Temperature Range	-40°C ~ 85°C
Package Type	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACT563SCX is determined by strict equivalence across the following critical parameters:

Logic Type: D-Type Transparent Latch
Circuit Configuration: 8:8
Output Type: Tri-State
Supply Voltage Range: 4.5V ~ 5.5V
Independent Circuits: 1
Operating Temperature Range: -40°C ~ 85°C
Package Type: 20-SOIC surface mount
Output Current Capability: 24mA minimum (both high and low)

All identified substitute parts maintain these core electrical and mechanical specifications. Variations in propagation delay (6ns to 7ns) and packaging format (tube versus tape & reel) do not affect functional substitutability within the defined parameter set.

Parameter Comparison

Parameter	74ACT563SCX (onsemi)	SN74ACT563DW (TI)	SN74ACT563DWR (TI)	SN74ACT573DWR (TI)
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch
Circuit Configuration	8:8	8:8	8:8	8:8
Output Type	Tri-State	Tri-State	Tri-State	Tri-State
Supply Voltage	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Independent Circuits	1	1	1	1
Propagation Delay	7ns	6.5ns	6.5ns	6ns
Output Current (High/Low)	24mA / 24mA	24mA / 24mA	24mA / 24mA	24mA / 24mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Last Time Buy	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Not specified	Tube	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

For applications currently using the 74ACT563SCX, the following selection criteria apply based on product status and compliance:

SN74ACT563DWR (Texas Instruments) is the primary recommended substitute. This part maintains active product status, carries ROHS3 compliance certification, and is available in tape & reel packaging suitable for automated assembly. The 6.5ns propagation delay is faster than the original specification, ensuring backward compatibility in timing-critical applications.

SN74ACT573DWR (Texas Instruments) serves as an alternative parametric equivalent. While the base product number differs (74ACT573 versus 74ACT563), all electrical and mechanical parameters remain within specification. This part offers the fastest propagation delay at 6ns and maintains active status with ROHS3 compliance.

SN74ACT563DW (Texas Instruments) is available as a secondary option with last-time-buy status. Tube packaging may require manual handling in production environments compared to tape & reel formats.

All three Texas Instruments substitutes provide superior availability and compliance documentation compared to the obsolete onsemi original.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT563DWR be used as a direct replacement for 74ACT563SCX?

A: Yes. Both parts share identical logic type, circuit configuration, output type, supply voltage range, independent circuit count, operating temperature range, package type, and output current specifications. The faster propagation delay (6.5ns versus 7ns) does not create compatibility issues.

Q: What is the difference between SN74ACT563DWR and SN74ACT573DWR?

A: The base product numbers differ (74ACT563 versus 74ACT573), but all critical electrical parameters are equivalent. Both maintain 8:8 circuit configuration, tri-state output, and identical supply voltage and temperature ranges. The SN74ACT573DWR offers marginally faster propagation delay at 6ns.

Q: Does packaging format affect electrical performance?

A: No. Tube and tape & reel packaging formats contain identical die and electrical characteristics. Packaging selection depends on production assembly requirements and handling procedures.

Q: Are the Texas Instruments substitutes RoHS compliant?

A: Yes. All three Texas Instruments parts carry ROHS3 compliance certification, whereas the original onsemi part does not specify RoHS status.

Q: Can I use these substitutes in new designs?

A: Yes. SN74ACT563DWR and SN74ACT573DWR maintain active product status, making them suitable for new design implementations. SN74ACT563DW carries last-time-buy status and should be evaluated for long-term availability requirements.

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