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ATF1502AS-10AI44 Equivalent & Substitute Parts
Part Overview
The ATF1502AS-10AI44 is a Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology, featuring 32 macrocells and 32 I/O pins with a maximum propagation delay of 10 nanoseconds. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement requirements. The part operates within the 4.5V to 5.5V supply range and is housed in a 44-pin TQFP surface-mount package.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Technology |
| Series | ATF15xx |
| Number of Macrocells | 32 |
| Number of I/O | 32 |
| Delay Time tpd(1) Max | 10 ns |
| Voltage Supply - Internal | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 44-TQFP |
| Mounting Type | Surface Mount |
| Programmable Type | In System Programmable (min 10K program/erase cycles) |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
Substitute Part Grouping Explanation
Substitution eligibility for the ATF1502AS-10AI44 is determined by strict equivalence across the following critical parameters:
- Identical macrocell count (32 macrocells)
- Identical I/O pin count (32 I/O)
- Matching propagation delay specification (10 ns maximum)
- Identical voltage supply range (4.5V ~ 5.5V)
- Identical operating temperature range (-40°C ~ 85°C)
- Identical package type (44-TQFP)
- Same programmable technology (In System Programmable)
- Equivalent moisture sensitivity rating (MSL 3)
The ATF1502AS-10AU44 meets all substitution criteria as a direct equivalent within the ATF15xx series.
Parameter Comparison
| Parameter | ATF1502AS-10AI44 | ATF1502AS-10AU44 |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Series | ATF15xx | ATF15xx |
| Number of Macrocells | 32 | 32 |
| Number of I/O | 32 | 32 |
| Delay Time tpd(1) Max | 10 ns | 10 ns |
| Voltage Supply - Internal | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Package / Case | 44-TQFP | 44-TQFP |
| Mounting Type | Surface Mount | Surface Mount |
| Programmable Type | In System Programmable (min 10K program/erase cycles) | In System Programmable (min 10K program/erase cycles) |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) | 3 (168 Hours) |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
Engineering Selection Recommendations
The ATF1502AS-10AU44 is the direct functional equivalent for the obsolete ATF1502AS-10AI44. Both devices share identical electrical and mechanical specifications across all critical parameters. The primary distinction is product lifecycle status: the ATF1502AS-10AU44 maintains active production status with ROHS3 compliance certification, whereas the ATF1502AS-10AI44 is classified as obsolete with non-compliant RoHS status.
For new designs or ongoing procurement, the ATF1502AS-10AU44 is the appropriate selection due to its active product status and regulatory compliance. The packaging difference (Tray versus unspecified for the main part) does not affect functional compatibility and relates only to supply format.
Frequently Asked Questions (FAQ)
Q: Are the ATF1502AS-10AI44 and ATF1502AS-10AU44 pin-compatible?
A: Yes. Both devices use the 44-TQFP package with identical pin assignments, macrocell architecture, and I/O configuration.
Q: Can the ATF1502AS-10AU44 replace the ATF1502AS-10AI44 in existing designs?
A: Yes. The electrical and timing specifications are identical, including propagation delay, voltage supply range, and operating temperature range. No design modifications are required.
Q: What is the significance of the different packaging designations (AI versus AU)?
A: The suffix designates the supply format and compliance certification. The AU variant includes ROHS3 compliance and is supplied in Tray packaging. Functionally, both variants are equivalent.
Q: Why is the ATF1502AS-10AI44 classified as obsolete?
A: Product obsolescence reflects Microchip Technology's lifecycle management. The ATF1502AS-10AU44 remains in active production and is the recommended alternative for procurement.
Q: Are there any thermal or environmental differences between these parts?
A: No. Both devices operate across the identical temperature range (-40°C to 85°C) and share the same moisture sensitivity rating (MSL 3, 168 hours).
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