ATF1508AS-15AI100 Equivalent & Substitute Parts

Part Overview

The ATF1508AS-15AI100 is a Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology, featuring 128 macrocells and 80 I/O pins in a 100-pin TQFP surface mount package. This device operates with a maximum propagation delay of 15 nanoseconds and supports in-system programming with a minimum of 10,000 program/erase cycles.

The ATF1508AS-15AI100 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this CPLD architecture.

Substiute Parts

ATF1508AS-15AI100

Microchip TechnologyIn Stock: 2162ATF1508AS-15AI100 Datasheet

Current PartRFQ

ATF1508AS-10AU100

Microchip TechnologyIn Stock: 1435ATF1508AS-10AU100 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATF1508AS-15AI100 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Manufacturer: Microchip Technology
• Series: ATF15xx
• Number of Macrocells: 128
• Number of I/O: 80
• Package / Case: 100-TQFP (14x14)
• Mounting Type: Surface Mount
• Voltage Supply - Internal: 4.5V ~ 5.5V
• Operating Temperature Range: -40°C ~ 85°C (TA)
• Programmable Type: In System Programmable (min 10K program/erase cycles)
• Moisture Sensitivity Level (MSL): 3 (168 Hours)

Performance Parameter Consideration: The delay time tpd(1) Max specification may vary between equivalent parts. Substitute parts with equal or superior (lower) delay time specifications are functionally compatible with designs specified for the ATF1508AS-15AI100.

Parameter Comparison

Engineering Selection Recommendations

The ATF1508AS-10AU100 is a direct functional substitute for the ATF1508AS-15AI100. Both devices share identical macrocell count, I/O configuration, package specifications, voltage supply requirements, and operating temperature range.

Key Advantages of ATF1508AS-10AU100:

The substitute part offers superior propagation delay performance (10 ns versus 15 ns), providing enhanced timing margins for high-speed logic applications. The ATF1508AS-10AU100 maintains active product status with Microchip Technology, ensuring continued availability and supply chain support. This part is ROHS3 compliant, meeting current environmental and regulatory requirements, whereas the main part is RoHS non-compliant.

Compatibility Considerations:

The ATF1508AS-10AU100 is pin-compatible and functionally equivalent at the device level. Designs originally specified for the ATF1508AS-15AI100 operate without modification on the substitute part. The improved timing characteristics of the substitute part do not introduce incompatibility with existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the ATF1508AS-10AU100 directly replace the ATF1508AS-15AI100 in existing designs?

A: Yes. Both devices are identical in macrocell count (128), I/O configuration (80 pins), package type (100-TQFP), voltage supply range (4.5V ~ 5.5V), and operating temperature range (-40°C ~ 85°C). The substitute part features superior timing performance (10 ns versus 15 ns propagation delay), which is compatible with designs specified for the original part.

Q: What is the significance of the delay time difference between these parts?

A: The ATF1508AS-10AU100 specifies a maximum propagation delay of 10 nanoseconds, compared to 15 nanoseconds for the ATF1508AS-15AI100. This represents improved timing performance. Designs originally specified for 15 ns operation function correctly with the faster 10 ns device, as timing margins are maintained or improved.

Q: Are there any package or mounting differences between these parts?

A: No. Both parts use identical 100-pin TQFP surface mount packaging with 14x14 mm dimensions. PCB footprints, solder reflow profiles, and assembly processes are identical.

Q: What is the difference in product status between these parts?

A: The ATF1508AS-15AI100 is classified as obsolete, indicating discontinued manufacturing and limited availability. The ATF1508AS-10AU100 maintains active product status with Microchip Technology, ensuring ongoing availability and technical support.

Q: How do the RoHS compliance statuses differ?

A: The ATF1508AS-15AI100 is RoHS non-compliant, while the ATF1508AS-10AU100 is ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the substitute part satisfies current environmental compliance standards.

Q: Are the programmable characteristics identical?

A: Yes. Both devices support in-system programming with a minimum of 10,000 program/erase cycles. Programming methodology, cycle life, and in-system programmability are equivalent.

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

A: Both the ATF1508AS-15AI100 and ATF1508AS-10AU100 specify MSL 3 with a 168-hour floor life. Handling, storage, and reflow requirements are identical for both parts.