EPM7128BFI100-7 Equivalent & Substitute Parts

Part Overview

The EPM7128BFI100-7 is a Complex Programmable Logic Device (CPLD) from Intel's MAX® 7000B series, featuring 128 macrocells and 2500 gates in a 100-pin Fine-pitch Ball Grid Array (FBGA) package. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and production continuity. The part operates across industrial temperature ranges (-40°C to 85°C) and supports in-system programmability, making it suitable for embedded applications requiring field-configurable logic.

Substiute Parts

EPM7128BFI100-7

IntelIn Stock: 829EPM7128BFI100-7 Datasheet

Current PartRFQ

ATF1508ASV-15AU100

Microchip TechnologyIn Stock: 1205ATF1508ASV-15AU100 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the EPM7128BFI100-7 is determined by the following critical parameters:

• Logic Capacity: Minimum 128 macrocells required to maintain functional equivalence
• I/O Count: Minimum 80 I/O pins to support signal routing requirements
• Programmability: In-system programmable capability mandatory
• Operating Temperature Range: -40°C to 85°C minimum
• Voltage Supply Compatibility: Internal supply voltage must be compatible with system design
• Delay Performance: Maximum propagation delay acceptable for timing-critical applications
• Package Type: Surface-mount technology with pin-compatible or functionally equivalent footprint

The ATF1508ASV-15AU100 from Microchip Technology meets these substitution criteria with equivalent macrocell count, I/O capability, and programmable architecture, though with different package geometry and voltage specifications requiring design validation.

Parameter Comparison

Engineering Selection Recommendations

The ATF1508ASV-15AU100 serves as a functional substitute for the obsolete EPM7128BFI100-7 based on the following engineering criteria:

Functional Equivalence: Both devices provide 128 macrocells and in-system programmability, supporting equivalent logic density for embedded applications.

Product Status: The ATF1508ASV-15AU100 maintains active product status with current manufacturing support, ensuring long-term availability and supply chain stability compared to the obsolete EPM7128BFI100-7.

Compliance & Certifications: Both parts maintain identical Moisture Sensitivity Level (MSL 3) and REACH compliance status, supporting equivalent handling and environmental requirements.

Design Considerations: Substitution requires validation of the following differences:

• Package geometry change from 100-LBGA (11x11) to 100-TQFP (14x14) necessitates PCB layout redesign
• Voltage supply adjustment from 2.375V–2.625V to 3V–3.6V requires power distribution circuit modification
• Propagation delay increase from 7.5 ns to 15 ns may impact timing-critical signal paths
• I/O reduction from 84 to 80 pins requires verification of signal routing feasibility

Frequently Asked Questions (FAQ)

Q: Can the ATF1508ASV-15AU100 directly replace the EPM7128BFI100-7 without design changes?

A: No. While both devices provide equivalent macrocell and programmable logic capacity, the package geometry differs (LBGA vs. TQFP), voltage supply ranges differ (2.375V–2.625V vs. 3V–3.6V), and I/O count is reduced (84 vs. 80 pins). PCB layout redesign and power supply circuit modification are required.

Q: What is the impact of the 7.5 ns to 15 ns propagation delay difference?

A: The ATF1508ASV-15AU100 has double the maximum propagation delay. Applications with timing margins greater than 7.5 ns may accommodate this difference. Timing-critical designs require detailed path analysis to confirm compatibility.

Q: Are both devices in-system programmable?

A: Yes. Both the EPM7128BFI100-7 and ATF1508ASV-15AU100 support in-system programmability, enabling field configuration and updates without device removal.

Q: What are the package footprint differences?

A: The EPM7128BFI100-7 uses a 100-pin Fine-pitch Ball Grid Array (FBGA) in an 11×11 mm footprint. The ATF1508ASV-15AU100 uses a 100-pin Thin Quad Flat Pack (TQFP) in a 14×14 mm footprint. These are not pin-compatible and require complete PCB redesign.

Q: Are moisture sensitivity requirements identical?

A: Yes. Both devices are classified as MSL 3 (168 Hours), requiring identical handling, storage, and reflow procedures.

Q: Which part should be selected for new designs?

A: The ATF1508ASV-15AU100 is recommended for new designs due to its active product status, ensuring availability and manufacturing support. The EPM7128BFI100-7 is obsolete and should only be used for legacy system maintenance where substitution is not feasible.