XC9536-6PC44C Equivalent & Substitute Parts

Part Overview

The XC9536-6PC44C is a Complex Programmable Logic Device (CPLD) manufactured by AMD, belonging to the XC9500 series. This device features 36 macrocells, 800 gates, and 34 I/O pins in a 44-pin PLCC package with a maximum propagation delay of 6 nanoseconds. The XC9536-6PC44C is classified as obsolete, making identification of functionally compatible alternatives essential for ongoing system support, design updates, and production continuity.

Substiute Parts

XC9536-6PC44C

AMDIn Stock: 990XC9536-6PC44C Datasheet

Current PartRFQ

ATF1502AS-7JX44

Microchip TechnologyIn Stock: 2307ATF1502AS-7JX44 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the XC9536-6PC44C is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must use the 44-pin PLCC (44-LCC J-Lead) package to ensure mechanical and electrical compatibility with existing PCB layouts and socket configurations.

Voltage Supply Range: The internal voltage supply range of 4.75V ~ 5.25V must be maintained to ensure proper device operation within the same power distribution architecture.

Operating Temperature Range: The 0°C ~ 70°C operating temperature specification must be met to guarantee functionality across the intended thermal environment.

Programmable Type: In-system programmability with a minimum of 10,000 program/erase cycles is required to maintain design flexibility and field reprogrammability.

I/O Pin Count: The substitute device must provide a minimum of 34 I/O pins to accommodate all signal connections in the original design.

Macrocell Count: The substitute must provide at least 36 macrocells to support the logic density requirements of the original implementation.

Propagation Delay: The maximum propagation delay specification determines timing performance; substitutes with equal or faster delay times maintain or improve system timing margins.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The XC9536-6PC44C is classified as obsolete, while the ATF1502AS-7JX44 is active. Selection of an active product ensures continued availability, manufacturing support, and supply chain stability for new production runs and field replacements.

Compliance Differences: The ATF1502AS-7JX44 is ROHS3 compliant, whereas the XC9536-6PC44C is RoHS non-compliant. This distinction is significant for applications subject to RoHS regulations or customer requirements mandating compliant components.

Logic Density Trade-off: The ATF1502AS-7JX44 provides 32 macrocells compared to the 36 macrocells in the XC9536-6PC44C. Designs utilizing fewer than 32 macrocells are directly compatible. Designs requiring all 36 macrocells may require logic optimization or partitioning across multiple devices.

I/O Pin Availability: The ATF1502AS-7JX44 provides 32 I/O pins versus 34 in the XC9536-6PC44C. Designs utilizing 32 or fewer I/O connections are compatible. Designs requiring all 34 I/O pins require alternative solutions.

Timing Performance: The ATF1502AS-7JX44 has a maximum propagation delay of 7.5 nanoseconds compared to 6 nanoseconds for the XC9536-6PC44C. Timing-critical applications must verify that the 1.5-nanosecond increase in delay does not violate system timing constraints.

Package and Thermal Compatibility: Both devices use identical 44-pin PLCC packages with equivalent physical dimensions and thermal characteristics, ensuring direct PCB compatibility and thermal management equivalence.

Frequently Asked Questions (FAQ)

Q: Can the ATF1502AS-7JX44 directly replace the XC9536-6PC44C in all applications?

A: Direct replacement is possible only when the design utilizes 32 or fewer macrocells and 32 or fewer I/O pins. The ATF1502AS-7JX44 provides reduced logic density and I/O count compared to the XC9536-6PC44C. Additionally, the 1.5-nanosecond increase in propagation delay must be evaluated against system timing requirements.

Q: What are the package compatibility implications?

A: Both devices use 44-pin PLCC packages with J-lead configuration. Physical dimensions are equivalent (16.59x16.59 mm for XC9536-6PC44C and 16.6x16.6 mm for ATF1502AS-7JX44), ensuring PCB footprint compatibility and socket interchangeability. No PCB redesign is required for package accommodation.

Q: How does the voltage supply specification affect substitution?

A: Both devices operate within the identical voltage supply range of 4.75V ~ 5.25V. No power supply modifications are necessary when substituting between these parts. Existing voltage regulation and distribution circuits remain compatible.

Q: What is the significance of the RoHS compliance difference?

A: The XC9536-6PC44C is RoHS non-compliant, while the ATF1502AS-7JX44 is ROHS3 compliant. For applications subject to RoHS regulations or customer specifications requiring compliant components, the ATF1502AS-7JX44 is the appropriate selection. For legacy systems without RoHS requirements, both parts are functionally equivalent from a compliance perspective.

Q: Are there timing considerations when substituting these parts?

A: Yes. The ATF1502AS-7JX44 has a maximum propagation delay of 7.5 nanoseconds versus 6 nanoseconds for the XC9536-6PC44C. For timing-critical applications operating near maximum frequency specifications, the additional 1.5-nanosecond delay may impact system performance. Timing analysis must be performed to confirm compatibility with system clock frequencies and setup/hold time requirements.

Q: What is the impact of reduced macrocell and I/O count on design migration?

A: The ATF1502AS-7JX44 provides 32 macrocells and 32 I/O pins compared to 36 macrocells and 34 I/O pins in the XC9536-6PC44C. Designs utilizing the full capacity of the XC9536-6PC44C require logic optimization, partitioning across multiple devices, or selection of alternative parts with higher logic density. Designs with headroom in logic utilization and I/O requirements are compatible without modification.

Q: Is the in-system programmability equivalent between these devices?

A: Both devices support in-system programmability with a minimum of 10,000 program/erase cycles. Programming methodology, tool compatibility, and interface requirements must be verified against specific design implementation and development environment specifications.

Q: What is the operating temperature range compatibility?

A: Both devices operate across the identical temperature range of 0°C ~ 70°C (TA). No thermal management modifications are required when substituting between these parts. Existing thermal design and environmental specifications remain valid.