Renesas 7204L20J Asynchronous FIFO Equivalent & Substitute Parts

Part Overview

The Renesas 7204L20J 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 and substitute parts necessary for ongoing system support and new designs. The 7204L20J operates at 33.3MHz with a 20ns access time and is designed for uni-directional data buffering applications requiring depth and width expansion capabilities.

Substiute Parts

7204L20J

Renesas Electronics CorporationIn Stock: 8167204L20J Datasheet

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7204L12JG

Renesas Electronics CorporationIn Stock: 14217204L12JG Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The 7204L12JG qualifies as a direct substitute for the 7204L20J based on the following critical parameters:

• Memory Architecture: Both parts maintain identical 36K (4K x 9) capacity
• Function Type: Both are asynchronous FIFOs with uni-directional bus configuration
• Voltage Supply Range: Both operate within 4.5V ~ 5.5V specification
• Current Supply: Both rated at 120mA maximum
• Package / Case: Both use 32-LCC (J-Lead) with identical 32-PLCC (14x11.46) physical dimensions
• Operating Temperature: Both support 0°C ~ 70°C range
• Mounting Type: Both are surface mount components
• Expansion Capability: Both support depth and width expansion

The 7204L12JG represents a performance upgrade with improved access time (12ns vs 20ns) and higher data rate (50MHz vs 33.3MHz) while maintaining full electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 7204L12JG is the qualified substitute for the 7204L20J. Selection should be based on the following factors:

Product Status: The 7204L20J is obsolete, while the 7204L12JG maintains active product status with confirmed inventory availability (1376 pcs in stock vs 796 pcs for the main part).

Compliance: The 7204L12JG achieves ROHS3 compliance, whereas the 7204L20J is RoHS non-compliant. For applications subject to RoHS regulations, the 7204L12JG is the required choice.

Performance Characteristics: The 7204L12JG provides superior performance with 12ns access time and 50MHz data rate compared to the 7204L20J specifications of 20ns and 33.3MHz. These improvements are backward compatible with designs originally specified for the 7204L20J.

Electrical and Mechanical Compatibility: Both parts share identical voltage supply ranges, current ratings, package dimensions, and operating temperature specifications, ensuring direct PCB-level compatibility without design modifications.

Frequently Asked Questions (FAQ)

Q: Can the 7204L12JG directly replace the 7204L20J without PCB modifications?

A: Yes. Both parts use the 32-LCC (J-Lead) package with identical 32-PLCC (14x11.46) physical dimensions and pinout. No PCB layout changes are required.

Q: What are the key differences between these parts?

A: The primary differences are access time (12ns vs 20ns) and data rate (50MHz vs 33.3MHz). The 7204L12JG is faster and offers improved performance. Both maintain identical memory capacity, voltage supply range, current ratings, and operating temperature specifications.

Q: Is the 7204L12JG suitable for legacy designs originally specified for the 7204L20J?

A: Yes. The 7204L12JG is a performance upgrade that maintains full backward compatibility. Designs specified for 20ns access time and 33.3MHz operation will function correctly with the faster 7204L12JG.

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

A: The 7204L20J is RoHS non-compliant while the 7204L12JG is ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the 7204L12JG must be used.

Q: Are there any supply voltage or current considerations when substituting?

A: No. Both parts operate within the identical 4.5V ~ 5.5V supply range and are rated for 120mA maximum current. No power supply modifications are necessary.

Q: What is the operating temperature range for both parts?

A: Both the 7204L20J and 7204L12JG operate across 0°C ~ 70°C, ensuring compatibility in equivalent thermal environments.

Q: Why is the 7204L20J listed as obsolete?

A: The 7204L20J has reached end-of-life status. The 7204L12JG represents the active equivalent with superior performance characteristics and modern compliance certifications.