Renesas 7204L35J Asynchronous FIFO - Equivalent & Substitute Parts

Part Overview

The Renesas 7204L35J is an asynchronous FIFO memory IC with 36K capacity (4K x 9 bits) in a 32-PLCC surface mount package. This component is classified as obsolete, making equivalent or substitute parts necessary for new designs and ongoing production support. The 7204L35J operates at 22.22MHz with a 35ns access time and is designed for uni-directional data buffering applications requiring depth and width expansion capabilities.

Substiute Parts

7204L35J

Renesas Electronics CorporationIn Stock: 8007204L35J Datasheet

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7204L12JG

Renesas Electronics CorporationIn Stock: 14217204L12JG Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7204L35J is determined by the following critical parameters:

• Memory capacity (36K / 4K x 9 bits)
• Asynchronous FIFO function
• Uni-directional bus architecture
• Voltage supply range (4.5V ~ 5.5V)
• Package type (32-PLCC with identical footprint)
• Operating temperature range (0°C ~ 70°C)
• Mounting type (Surface Mount)

The 7204L12JG qualifies as a direct substitute because it maintains identical memory capacity, function, bus directionality, voltage supply, package footprint, operating temperature, and mounting type. The substitute offers improved electrical performance (50MHz data rate, 12ns access time) while remaining pin-compatible and functionally equivalent.

Parameter Comparison

Engineering Selection Recommendations

The 7204L12JG is the qualified substitute for the 7204L35J based on the following engineering criteria:

Product Status: The 7204L35J is obsolete, while the 7204L12JG maintains active product status with confirmed inventory availability (1376 pcs in stock versus 787 pcs for the obsolete part).

Compliance & Certifications: The 7204L12JG achieves ROHS3 compliance, whereas the 7204L35J is RoHS non-compliant. Both parts maintain identical REACH Unaffected and EAR99 ECCN classifications.

Electrical Performance: The substitute provides superior performance specifications (50MHz data rate and 12ns access time) compared to the original part (22.22MHz and 35ns). These improvements are backward-compatible with applications designed for the 7204L35J.

Physical & Functional Compatibility: Identical package footprint (32-PLCC 14x11.46), pin count, voltage supply range, and operating temperature ensure direct PCB-level compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can the 7204L12JG replace the 7204L35J in existing designs?

A: Yes. The 7204L12JG is pin-compatible and functionally equivalent. It maintains the same 32-PLCC package footprint, memory capacity (36K / 4K x 9), voltage supply range (4.5V ~ 5.5V), and operating temperature range (0°C ~ 70°C). No PCB redesign is required.

Q: What are the key differences between these parts?

A: The primary differences are product status and performance. The 7204L12JG is active production with ROHS3 compliance, while the 7204L35J is obsolete and RoHS non-compliant. The 7204L12JG offers faster access time (12ns versus 35ns) and higher data rate (50MHz versus 22.22MHz).

Q: Are there any electrical compatibility concerns?

A: No. Both parts operate on identical voltage supply (4.5V ~ 5.5V), draw the same maximum current (120mA), and support the same asynchronous FIFO function with uni-directional bus architecture. The improved performance of the substitute does not introduce incompatibility.

Q: What is the package compatibility status?

A: Both parts use the 32-PLCC (14x11.46) surface mount package with J-Lead configuration. The physical footprint, pin spacing, and mounting requirements are identical, ensuring direct PCB compatibility.

Q: Why should I select the 7204L12JG over the 7204L35J?

A: The 7204L35J is obsolete with limited inventory. The 7204L12JG provides active production support, superior performance specifications, and ROHS3 compliance for modern regulatory requirements. It is the recommended choice for new designs and production continuity.