EPCS1SI8N Equivalent & Substitute Parts

Part Overview

The EPCS1SI8N is a 1Mbit in-system programmable configuration device manufactured by Intel, housed in an 8-SOIC surface mount package. This part is classified as obsolete, making identification of compatible alternatives essential for ongoing system support and production continuity. The EPCS series serves as a configuration memory solution for programmable logic devices, and substitute parts must maintain electrical and mechanical compatibility to ensure seamless integration into existing designs.

Substiute Parts

EPCS1SI8N

IntelIn Stock: 20290EPCS1SI8N Datasheet

Current PartRFQ

EPCQ4ASI8N

IntelIn Stock: 24558EPCQ4ASI8N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the EPCS1SI8N is determined by the following critical parameters:

• Package Compatibility: Both main and substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure PCB footprint and assembly process compatibility.
• Electrical Interface: Supply voltage range of 2.7V ~ 3.6V must be maintained to ensure proper operation within the host system's power delivery specifications.
• Operating Temperature Range: The -40°C ~ 85°C range must be supported to guarantee functionality across the intended application environment.
• Programmable Type: In-system programmability is a core functional requirement and must be preserved in any substitute.
• Moisture Sensitivity: MSL 3 classification indicates identical handling and storage requirements.

The EPCQ4ASI8N qualifies as a substitute based on these parameters. While it offers increased memory capacity (4Mb versus 1Mb), this represents a functional enhancement rather than a limitation, as the device maintains full backward compatibility with the electrical and mechanical interface requirements of the EPCS1SI8N.

Parameter Comparison

Engineering Selection Recommendations

The EPCQ4ASI8N is the qualified substitute for the obsolete EPCS1SI8N. Selection of this alternative is supported by the following factors:

• Product Status: The EPCQ4ASI8N maintains active product status, ensuring continued availability and manufacturing support, whereas the EPCS1SI8N is obsolete.
• Compliance: The EPCQ4ASI8N carries RoHS compliance certification, meeting modern regulatory requirements for electronic components.
• Electrical Compatibility: Identical supply voltage range and operating temperature specifications ensure direct functional compatibility without circuit modification.
• Package Equivalence: Both devices utilize the same 8-SOIC package footprint, permitting direct PCB substitution without layout changes.
• Memory Capacity: The increased 4Mb capacity of the EPCQ4ASI8N provides additional configuration storage without introducing incompatibility, as the device operates within the same electrical and thermal envelope.

Frequently Asked Questions (FAQ)

Q: Can the EPCQ4ASI8N be used as a direct replacement for the EPCS1SI8N on existing PCBs?

A: Yes. Both devices share identical package geometry (8-SOIC), supply voltage requirements (2.7V ~ 3.6V), operating temperature range (-40°C ~ 85°C), and in-system programmability. The PCB footprint and assembly process remain unchanged.

Q: What is the primary difference between these two parts?

A: The EPCQ4ASI8N provides 4Mb of memory capacity compared to the 1Mb capacity of the EPCS1SI8N. This represents a functional enhancement with no electrical or mechanical incompatibility.

Q: Are there any compliance differences between the main part and substitute?

A: The EPCQ4ASI8N is RoHS compliant, whereas RoHS status is not specified for the obsolete EPCS1SI8N. This compliance improvement supports modern manufacturing and environmental standards.

Q: Do both parts require identical handling procedures?

A: Yes. Both parts carry Moisture Sensitivity Level 3 (168 Hours), requiring identical storage, handling, and reflow procedures during assembly.

Q: Is the EPCQ4ASI8N available in the same packaging format?

A: The EPCQ4ASI8N is supplied in tube packaging, whereas the EPCS1SI8N packaging format is not specified. Both use the 8-SOIC component package, ensuring PCB compatibility.