IDT7204L35SO Equivalent & Substitute Parts

Part Overview

The IDT7204L35SO is an asynchronous FIFO (First-In-First-Out) memory IC manufactured by Renesas Electronics Corporation. This device provides 36K bits of storage (4K x 9 organization) with a 35ns access time and 22.22MHz data rate in a 28-SOIC surface mount package. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations. The primary reason for seeking alternatives is the discontinued product status, which limits long-term availability and supply chain reliability.

Substiute Parts

IDT7204L35SO

Renesas Electronics CorporationIn Stock: 869IDT7204L35SO Datasheet

Current PartRFQ

7204L12SOG

Renesas Electronics CorporationIn Stock: 10017204L12SOG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IDT7204L35SO is determined by strict adherence to the following electrical and mechanical parameters:

Critical Compatibility Parameters:

• Memory organization: 36K (4K x 9) bits
• Function type: Asynchronous FIFO
• Bus configuration: Uni-Directional
• Supply voltage range: 4.5V ~ 5.5V
• Package type: 28-SOIC with 0.345" (8.77mm) width
• Mounting method: Surface Mount
• Operating temperature range: 0°C ~ 70°C

Performance Parameters (Substitution Allowed):

• Access time: Equal to or faster than 35ns
• Data rate: Equal to or faster than 22.22MHz
• Maximum supply current: Equal to or less than 120mA

The IDT7204L12SOG qualifies as a direct substitute because it maintains identical memory organization, function type, bus configuration, supply voltage, package specifications, and operating temperature range. The substitute exhibits superior performance characteristics with faster access time (12ns versus 35ns) and higher data rate (50MHz versus 22.22MHz), making it a drop-in replacement with enhanced capabilities.

Parameter Comparison

Engineering Selection Recommendations

The IDT7204L12SOG is the qualified substitute for the IDT7204L35SO based on the following engineering criteria:

Product Status Advantage: The substitute part maintains active product status with Renesas Electronics Corporation, ensuring continued availability and supply chain support. The main part's obsolete classification creates long-term sourcing risk.

Compliance Improvement: The IDT7204L12SOG achieves ROHS3 compliance, whereas the main part is RoHS non-compliant. This compliance upgrade aligns with modern manufacturing and environmental standards.

Performance Enhancement: The substitute delivers superior electrical performance with 12ns access time (3x faster) and 50MHz data rate (2.25x faster) while maintaining identical supply voltage, current specifications, and package footprint. These performance improvements provide design margin without requiring circuit modifications.

Electrical Compatibility: Both parts operate within the identical 4.5V to 5.5V supply voltage range and maintain the same maximum supply current specification of 120mA, ensuring direct electrical substitution without power supply redesign.

Physical Compatibility: Identical 28-SOIC package specifications and surface mount configuration enable direct PCB placement without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the IDT7204L12SOG replace the IDT7204L35SO in existing designs?

A: Yes. The IDT7204L12SOG is a direct substitute with identical memory organization (4K x 9), function type (asynchronous FIFO), bus configuration (uni-directional), supply voltage range (4.5V ~ 5.5V), package type (28-SOIC), and operating temperature range (0°C ~ 70°C). The substitute's faster access time and higher data rate do not create compatibility issues in systems designed for the original part.

Q: What are the key differences between these parts?

A: The primary differences are access time (12ns versus 35ns), data rate (50MHz versus 22.22MHz), product status (active versus obsolete), and RoHS compliance (ROHS3 compliant versus non-compliant). All other electrical and mechanical specifications remain identical.

Q: Will the faster access time of the substitute cause timing issues?

A: No. The substitute's 12ns access time is faster than the original 35ns specification. Systems designed to operate with 35ns access time will function correctly with faster components. Timing margins increase rather than decrease.

Q: Are the packages physically identical?

A: Yes. Both parts use the 28-SOIC package with 0.345" (8.77mm) width. PCB footprints, pin assignments, and mounting methods are identical, enabling direct component substitution without layout changes.

Q: Does the substitute require different supply voltage?

A: No. Both parts operate within the identical 4.5V to 5.5V supply voltage range and draw the same maximum supply current of 120mA. Power supply circuits require no modification.

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

A: The substitute's ROHS3 compliance indicates conformance to current environmental and manufacturing standards. The original part's non-compliant status may create sourcing restrictions in regulated industries or regions with RoHS requirements.