Renesas 7204L15J Asynchronous FIFO - Equivalent & Substitute Parts

Part Overview

The Renesas 7204L15J is an asynchronous FIFO memory IC with 36K capacity (4K x 9 bits) designed for uni-directional data buffering applications. Operating at 40MHz with 15ns access time, this component is housed in a 32-PLCC surface mount package. The 7204L15J is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

7204L15J

Renesas Electronics CorporationIn Stock: 7457204L15J 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 7204L15J is determined by the following critical parameters:

• Memory capacity: 36K (4K x 9) configuration
• Function type: Asynchronous FIFO operation
• Bus architecture: Uni-directional data flow
• Package form factor: 32-PLCC (14x11.46mm)
• Supply voltage range: 4.5V ~ 5.5V compatibility
• Mounting technology: Surface mount

The 7204L12JG qualifies as a direct substitute based on matching memory size, function, bus directionality, package, voltage specification, and mounting type. Performance parameters (data rate and access time) are improved in the substitute part, making it functionally compatible for applications requiring the 7204L15J.

Parameter Comparison

Engineering Selection Recommendations

The 7204L12JG is the qualified substitute for the obsolete 7204L15J. Selection of the 7204L12JG provides the following advantages:

• Active product status ensures long-term availability and supply chain continuity
• ROHS3 compliance meets current environmental and regulatory requirements, whereas the 7204L15J is RoHS non-compliant
• Improved performance specifications (50MHz data rate, 12ns access time) exceed the original part requirements
• Identical package footprint (32-PLCC) and mounting technology enable direct PCB compatibility
• Matching electrical parameters (voltage supply, current draw, operating temperature range) ensure functional equivalence

Frequently Asked Questions (FAQ)

Q: Can the 7204L12JG directly replace the 7204L15J in existing designs?

A: Yes. The 7204L12JG maintains identical memory capacity, package form factor, supply voltage range, and mounting type. The improved access time (12ns vs. 15ns) and data rate (50MHz vs. 40MHz) are backward compatible with applications designed for the 7204L15J.

Q: What is the significance of the access time difference between these parts?

A: Access time defines the delay from address input to valid data output. The 7204L12JG's 12ns access time is faster than the 7204L15J's 15ns specification. This improvement does not create compatibility issues; systems designed for 15ns operation function correctly with 12ns components.

Q: Are there package or pinout differences between these parts?

A: No. Both parts use the 32-PLCC (J-Lead) package with identical 14x11.46mm dimensions. Pinout and PCB footprint are identical, enabling direct substitution without layout modifications.

Q: Why is RoHS compliance important for this substitution?

A: The 7204L12JG is ROHS3 compliant while the 7204L15J is RoHS non-compliant. For new designs and systems subject to environmental regulations, the compliant substitute part is required. For legacy system maintenance, compliance requirements depend on application jurisdiction and customer specifications.

Q: Is the 7204L12JG available in the same packaging format?

A: The 7204L12JG is supplied in Tube packaging, whereas the 7204L15J packaging format is not specified. Both parts use the identical 32-PLCC component package. Tube packaging is a standard distribution format that does not affect component functionality or PCB integration.