ATF1500AL-20AC Equivalent & Substitute Parts

Part Overview

The ATF1500AL-20AC is a Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology, featuring 32 macrocells and 32 I/O pins in a 44-TQFP surface mount package. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and production requirements. The ATF1500AL-20AC operates with a 20 ns maximum propagation delay and supports in-system programming with a minimum of 100 program/erase cycles.

Substiute Parts

ATF1500AL-20AC

Microchip TechnologyIn Stock: 5429ATF1500AL-20AC Datasheet

Current PartRFQ

ATF1500AL-20AU

Microchip TechnologyIn Stock: 1738ATF1500AL-20AU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATF1500AL-20AC is determined by strict equivalence across the following critical parameters:

• Identical macrocell count (32 macrocells)
• Identical I/O pin count (32 I/O)
• Identical maximum propagation delay (20 ns)
• Identical package type and pinout (44-TQFP, 10x10)
• Identical surface mount mounting type
• Identical in-system programmable capability with minimum 100 program/erase cycles
• Same base product number (ATF1500)

The ATF1500AL-20AU meets all substitution criteria as a direct equivalent within the ATF15xx series.

Parameter Comparison

Engineering Selection Recommendations

The ATF1500AL-20AU is the direct functional equivalent for the obsolete ATF1500AL-20AC. Both devices share identical core specifications: 32 macrocells, 32 I/O pins, 20 ns propagation delay, and 44-TQFP packaging.

The ATF1500AL-20AU offers additional advantages for new designs and production transitions:

• Active product status ensures continued availability and manufacturer support
• ROHS3 compliance meets current environmental and regulatory requirements
• Extended operating temperature range (-40°C to 85°C) provides broader application flexibility compared to the ATF1500AL-20AC (0°C to 70°C)
• Wider voltage supply tolerance (4.5V to 5.5V) versus the ATF1500AL-20AC (4.75V to 5.25V)

Pin-to-pin compatibility and identical electrical performance enable direct substitution in existing designs without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the ATF1500AL-20AU replace the ATF1500AL-20AC in existing designs?

A: Yes. Both devices are pin-to-pin compatible with identical macrocell count, I/O configuration, propagation delay, and 44-TQFP packaging. No circuit modifications are required.

Q: What is the primary reason to transition from ATF1500AL-20AC to ATF1500AL-20AU?

A: The ATF1500AL-20AC is obsolete. The ATF1500AL-20AU is an active product with continued manufacturer support, ensuring long-term availability for production and design requirements.

Q: Are there differences in operating temperature ranges between these devices?

A: Yes. The ATF1500AL-20AC operates from 0°C to 70°C, while the ATF1500AL-20AU operates from -40°C to 85°C. The extended range of the ATF1500AL-20AU accommodates broader environmental conditions.

Q: What is the difference in voltage supply specifications?

A: The ATF1500AL-20AC requires 4.75V to 5.25V, while the ATF1500AL-20AU accepts 4.5V to 5.5V. The wider tolerance of the ATF1500AL-20AU provides greater design flexibility.

Q: Does the ATF1500AL-20AU meet RoHS compliance?

A: Yes. The ATF1500AL-20AU is ROHS3 compliant. The ATF1500AL-20AC is RoHS non-compliant.

Q: Are the packaging and moisture sensitivity levels identical?

A: Yes. Both devices use 44-TQFP (10x10) surface mount packaging with MSL 3 (168 Hours) moisture sensitivity rating.

Q: What is the in-system programming capability of the ATF1500AL-20AU?

A: The ATF1500AL-20AU supports in-system programming with a minimum of 100 program/erase cycles, identical to the ATF1500AL-20AC.