ATF1508AS-7AC100 Equivalent & Substitute Parts

Part Overview

The ATF1508AS-7AC100 is a Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology, featuring 128 macrocells and 80 I/O pins in a 100-TQFP surface mount package. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

ATF1508AS-7AC100

Microchip TechnologyIn Stock: 1186ATF1508AS-7AC100 Datasheet

Current PartRFQ

ATF1508AS-7AX100

Microchip TechnologyIn Stock: 3232ATF1508AS-7AX100 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATF1508AS-7AC100 is determined by strict equivalence across the following critical parameters:

• Identical macrocell count (128)
• Identical I/O pin count (80)
• Identical propagation delay specification (7.5 ns maximum)
• Identical voltage supply range (4.75V ~ 5.25V)
• Identical operating temperature range (0°C ~ 70°C)
• Identical package type and pinout (100-TQFP, 14x14mm)
• Identical programmable type and cycle rating (In System Programmable, min 10K cycles)

The ATF1508AS-7AX100 meets all these criteria and qualifies as a direct functional substitute.

Parameter Comparison

Engineering Selection Recommendations

The ATF1508AS-7AX100 is the direct substitute for the obsolete ATF1508AS-7AC100. Both devices share identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility.

The primary distinction is product status and compliance posture. The ATF1508AS-7AC100 is obsolete and RoHS non-compliant, while the ATF1508AS-7AX100 is active and ROHS3 compliant. For new designs or ongoing production requiring regulatory compliance, the ATF1508AS-7AX100 is the appropriate selection. Both devices maintain identical REACH and ECCN classifications.

Frequently Asked Questions (FAQ)

Q: Are the ATF1508AS-7AC100 and ATF1508AS-7AX100 pin-compatible?

A: Yes. Both devices use the 100-TQFP package with identical pinout (14x14mm). No PCB layout modifications are required for substitution.

Q: What is the difference between the -7AC100 and -7AX100 suffixes?

A: The suffix denotes packaging and compliance variants. The -7AC100 uses tube packaging and is RoHS non-compliant. The -7AX100 uses tray packaging and is ROHS3 compliant. Electrical performance is identical.

Q: Can I use the ATF1508AS-7AX100 in place of the ATF1508AS-7AC100 in existing designs?

A: Yes. The devices are functionally equivalent across all electrical parameters, operating conditions, and performance specifications. No design changes are necessary.

Q: Are there any programming differences between these devices?

A: No. Both devices support In System Programming with identical cycle ratings (minimum 10K program/erase cycles). Programming tools and firmware compatibility are maintained.

Q: What is the inventory status for these parts?

A: The ATF1508AS-7AC100 has 1109 units in stock (obsolete status). The ATF1508AS-7AX100 has 3154 units in stock (active status), providing greater availability for procurement.