ATF20V8B-7SC Equivalent & Substitute Parts

Part Overview

The ATF20V8B-7SC is a 20V8 Programmable Logic Device (PLD) IC manufactured by Microchip Technology, featuring 8 macrocells and 7.5 ns propagation delay in a 24-SOIC surface mount package. This device is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The part operates at 5V input voltage and is designed for embedded logic applications requiring programmable functionality.

Substiute Parts

ATF20V8B-7SC

Microchip TechnologyIn Stock: 1232ATF20V8B-7SC Datasheet

Current PartRFQ

ATF22V10C-10SU

Microchip TechnologyIn Stock: 2003ATF22V10C-10SU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The ATF22V10C-10SU qualifies as a direct substitute based on the following alignment of critical parameters:

Matching Parameters:

• Manufacturer: Microchip Technology (same source)
• Mounting Type: Surface Mount (identical)
• Package / Case: 24-SOIC (0.295", 7.50mm Width) (identical footprint)
• Voltage - Input: 5V (identical operating voltage)
• Programmable Type: EE PLD (same technology)

Substitution Logic: The ATF22V10C-10SU maintains full physical and electrical compatibility through identical package geometry and voltage specifications. While the substitute features 10 macrocells versus 8 in the original part and operates at 10 ns versus 7.5 ns, these represent functional enhancements rather than limitations. The increased macrocell count provides additional logic resources, and the slightly slower speed remains within acceptable parameters for most applications originally designed for the ATF20V8B-7SC.

Parameter Comparison

Engineering Selection Recommendations

The ATF22V10C-10SU is the specified substitute for the obsolete ATF20V8B-7SC. Selection of this substitute is justified by:

Product Status: The ATF22V10C-10SU maintains active product status with Microchip Technology, ensuring continued availability and manufacturing support compared to the obsolete original part.

Compliance: The substitute achieves ROHS3 compliance, addressing modern regulatory requirements. The original part is RoHS non-compliant, making the substitute preferable for applications subject to environmental regulations.

Certification: The ATF22V10C-10SU is verified as programmable through DiGi-Electronics, confirming functional reliability and programming compatibility.

Physical Compatibility: Identical 24-SOIC package geometry and 5V voltage specification ensure direct board-level compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the ATF22V10C-10SU be used as a direct replacement on existing PCBs designed for the ATF20V8B-7SC?

A: Yes. Both devices use the 24-SOIC package with identical 0.295" (7.50mm) width, enabling direct pin-compatible substitution without PCB modification.

Q: What is the significance of the increased macrocell count in the substitute part?

A: The ATF22V10C-10SU provides 10 macrocells compared to 8 in the original part. This represents additional logic resources and does not create compatibility issues; designs utilizing 8 or fewer macrocells operate without constraint.

Q: How does the 10 ns speed of the substitute compare to the 7.5 ns speed of the original?

A: The substitute operates at 10 ns propagation delay versus 7.5 ns in the original. For applications where timing margins exist, this difference is acceptable. Critical timing-dependent designs require verification against specific setup and hold time requirements.

Q: What is the difference in Moisture Sensitivity Level (MSL) between these parts?

A: The original part has MSL 1 (unlimited shelf life), while the substitute has MSL 2 (1-year shelf life). MSL 2 requires standard moisture control during storage and handling but does not affect operational performance.

Q: Is the substitute RoHS compliant?

A: Yes. The ATF22V10C-10SU is ROHS3 compliant, whereas the original ATF20V8B-7SC is RoHS non-compliant. This makes the substitute suitable for applications subject to RoHS regulations.