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PI74FCT573ATS Equivalent & Substitute Parts
Part Overview
The PI74FCT573ATS is a D-Type Transparent Latch logic IC manufactured by Diodes Incorporated, featuring 1 channel with 8:8 circuit configuration and tri-state output capability in a 20-SOIC surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The 74FCT series logic family provides standard TTL-compatible switching functionality with specified propagation delay and output drive characteristics suitable for digital logic applications requiring transparent latch functionality.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Logic Type | D-Type Transparent Latch |
| Circuit Configuration | 8:8 |
| Output Type | Tri-State |
| Supply Voltage Range | 4.75V ~ 5.25V |
| Independent Circuits | 1 |
| Propagation Delay | 1.5ns |
| Output Current - High / Low | 15mA / 64mA |
| Operating Temperature Range | -40°C ~ 85°C |
| Package / Case | 20-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the PI74FCT573ATS 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: 4.75V ~ 5.25V
- Operating Temperature Range: -40°C ~ 85°C
- Package / Case: 20-SOIC (0.295", 7.50mm Width)
- Mounting Type: Surface Mount
- Moisture Sensitivity Level: 1 (Unlimited)
Substitute parts are grouped into two categories based on base product number and performance characteristics:
Category 1: CY74FCT573 Series - Direct functional equivalents with identical base product number, featuring 2ns propagation delay and 32mA/64mA output current specifications.
Category 2: CY74FCT2573 Series - Enhanced performance variants with improved propagation delay (1.5ns) and reduced output current specifications (15mA/12mA), offering superior electrical performance while maintaining functional compatibility.
All substitute parts are manufactured by Texas Instruments and are available in active product status with RoHS3 compliance.
Parameter Comparison
| Parameter | PI74FCT573ATS (Main) | CY74FCT573ATSOC | CY74FCT573ATSOCT | CY74FCT573CTSOC | CY74FCT573TSOC | CY74FCT573TSOCT | CY74FCT2573CTSOC | CY74FCT2573CTSOCT | CY74FCT2573TSOC | CY74FCT2573TSOCT |
|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Diodes Incorporated | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Logic Type | D-Type Transparent Latch | D-Type Transparent Latch | D-Type Transparent Latch | D-Type Transparent Latch | D-Type Transparent Latch | D-Type Transparent Latch | 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 | 8:8 | 8:8 | 8:8 | 8:8 | 8:8 | 8:8 |
| Output Type | Tri-State | Tri-State | Tri-State | Tri-State | Tri-State | Tri-State | Tri-State | Tri-State | Tri-State | Tri-State |
| Supply Voltage Range | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V |
| Propagation Delay | 1.5ns | 2ns | 2ns | 2ns | 2ns | 2ns | 1.5ns | 1.5ns | 1.5ns | 1.5ns |
| Output Current - High / Low | 15mA / 64mA | 32mA / 64mA | 32mA / 64mA | 32mA / 64mA | 32mA / 64mA | 32mA / 64mA | 15mA / 12mA | 15mA / 12mA | 15mA / 12mA | 15mA / 12mA |
| Operating Temperature Range | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -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) | 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) | 20-SOIC (0.295", 7.50mm Width) | 20-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active | Active | Active | Active | Discontinued at DiGi Electronics | Active | Active | Active | Active |
| RoHS Status | RoHS non-compliant | RoHS3 Compliant | RoHS3 Compliant | RoHS3 Compliant | RoHS3 Compliant | RoHS3 Compliant | RoHS3 Compliant | RoHS3 Compliant | RoHS3 Compliant | RoHS3 Compliant |
| Packaging Format | Bulk | Tube | Tape & Reel (TR) | Tube | Tube | Bulk | Tube | Tape & Reel (TR) | Tube | Tape & Reel (TR) |
Engineering Selection Recommendations
All Texas Instruments substitute parts maintain functional equivalence with the PI74FCT573ATS across critical electrical and mechanical parameters. Selection between substitute options should be based on the following criteria:
For Direct Replacement with Minimal Design Impact: CY74FCT573ATSOC or CY74FCT573ATSOCT are recommended as primary substitutes. These parts maintain the CY74FCT573 base product number and are fully compatible with existing designs. Both are available in active product status with RoHS3 compliance. Choose CY74FCT573ATSOC for tube packaging or CY74FCT573ATSOCT for tape & reel format based on assembly requirements.
For Enhanced Performance Requirements: CY74FCT2573CTSOC, CY74FCT2573CTSOCT, CY74FCT2573TSOC, or CY74FCT2573TSOCT offer superior electrical performance with 1.5ns propagation delay (matching the original PI74FCT573ATS specification) and reduced output current specifications. These parts are based on the CY74FCT2573 product line and are suitable for designs requiring tighter timing margins or lower power dissipation. All are available in active product status with RoHS3 compliance.
Packaging Considerations: Tube packaging (ATSOC, CTSOC, TSOC variants) is suitable for manual assembly or lower-volume production. Tape & reel format (ATSOCT, CTSOCT, TSOCT variants) is optimized for automated pick-and-place assembly and high-volume manufacturing.
Compliance Status: All recommended substitute parts are RoHS3 compliant, addressing the RoHS non-compliance status of the obsolete PI74FCT573ATS. This compliance upgrade is mandatory for new designs and procurement in regulated markets.
Frequently Asked Questions (FAQ)
Q: Can CY74FCT573 series parts be used interchangeably with CY74FCT2573 series parts?
A: Both series maintain functional compatibility as D-Type Transparent Latch 8:8 tri-state logic ICs in 20-SOIC packages. However, they differ in propagation delay and output current specifications. CY74FCT2573 parts offer superior performance with 1.5ns delay versus 2ns for CY74FCT573 parts. Design timing analysis should confirm compatibility before substitution.
Q: What is the difference between tube and tape & reel packaging?
A: Tube packaging contains loose components suitable for manual assembly or small-batch production. Tape & reel format presents components on continuous carrier tape for automated pick-and-place assembly equipment. Both formats contain identical die and electrical specifications; packaging choice depends on assembly process requirements.
Q: Is the PI74FCT573ATS pin-compatible with all listed substitute parts?
A: Yes. All substitute parts maintain the 20-SOIC package footprint (0.295", 7.50mm width) with identical pin assignments. Direct PCB footprint compatibility is confirmed across all listed alternatives.
Q: Why is RoHS3 compliance important for this substitution?
A: The original PI74FCT573ATS is RoHS non-compliant. All Texas Instruments substitute parts are RoHS3 compliant, meeting environmental and regulatory requirements for new designs and procurement in regulated markets. This compliance upgrade is a key advantage of substitution.
Q: What is the inventory status for these substitute parts?
A: All recommended substitute parts are available in active product status with confirmed inventory. CY74FCT573CTSOC and CY74FCT573ATSOC offer the highest inventory levels (3198 and 2120 units respectively), ensuring procurement continuity for volume requirements.
Q: Are there any electrical performance trade-offs when substituting the PI74FCT573ATS?
A: CY74FCT573 series parts feature 2ns propagation delay compared to the original 1.5ns specification, representing a 0.5ns increase. CY74FCT2573 series parts restore the original 1.5ns performance. Output current specifications vary between series; design analysis should confirm suitability for specific load requirements.
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