Equivalent & Substitute Parts for Renesas 7204L20TDB Asynchronous FIFO

Part Overview

The Renesas 7204L20TDB is an asynchronous FIFO memory IC with 36K capacity (4K x 9 bits) designed for uni-directional data buffering applications. This device operates at 33.3MHz with a 20ns access time and is housed in a 28-CDIP through-hole package. The 7204L20TDB is classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

7204L20TDB

Renesas Electronics CorporationIn Stock: 9947204L20TDB Datasheet

Current PartRFQ

7204L12JG

Renesas Electronics CorporationIn Stock: 14217204L12JG Datasheet

MFR RecommendedRFQ

7204L12JG

Renesas Electronics CorporationIn Stock: 14217204L12JG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 7204L20TDB is determined by the following critical parameters:

Core Functional Requirements:

• Memory capacity: 36K (4K x 9 bits)
• FIFO type: Asynchronous
• Bus configuration: Uni-Directional
• Supply voltage range: 4.5V ~ 5.5V
• Retransmit capability: Yes

Performance Characteristics:

• Data rate and access time must meet or exceed the original specification
• Maximum supply current must not exceed system power budget constraints

Physical & Environmental Constraints:

• Package type compatibility with PCB layout
• Operating temperature range suitability for application environment
• Compliance certifications for regulatory requirements

The 7204L12JG qualifies as a substitute based on identical memory capacity, function type, bus configuration, and voltage supply parameters. This device provides enhanced performance specifications while maintaining functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

Functional Compatibility: The 7204L12JG maintains identical memory capacity, asynchronous FIFO architecture, and uni-directional bus configuration as the 7204L20TDB. Both devices operate within the same 4.5V to 5.5V supply voltage range and support retransmit capability.

Performance Enhancement: The substitute device provides superior performance with 50MHz data rate versus 33.3MHz and 12ns access time versus 20ns. Maximum supply current is reduced from 150mA to 120mA, resulting in lower power consumption.

Product Status & Compliance: The 7204L20TDB is classified as obsolete, whereas the 7204L12JG maintains active product status with ROHS3 compliance. This transition addresses regulatory requirements and ensures long-term component availability.

Environmental & Packaging Considerations: The operating temperature range differs: the original supports -55°C to 125°C while the substitute operates 0°C to 70°C. Package transition from 28-CDIP through-hole to 32-PLCC surface-mount requires PCB redesign. Applications requiring extended temperature operation below 0°C or above 70°C must evaluate alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the 7204L12JG directly replace the 7204L20TDB without circuit modification?

A: Functional substitution is possible based on identical memory capacity and FIFO architecture. However, package transition from 28-CDIP to 32-PLCC requires PCB layout modification. Pin-to-pin compatibility must be verified against specific application schematics.

Q: What are the key differences between these two devices?

A: Primary differences include data rate (50MHz vs 33.3MHz), access time (12ns vs 20ns), supply current (120mA vs 150mA), operating temperature range (0°C–70°C vs -55°C–125°C), package type (32-PLCC vs 28-CDIP), and product status (Active vs Obsolete). The substitute offers improved performance and regulatory compliance.

Q: Is the 7204L12JG suitable for applications requiring -55°C operation?

A: No. The 7204L12JG operates within 0°C to 70°C temperature range. Applications requiring -55°C minimum operating temperature must identify alternative components with extended temperature specifications.

Q: What is the impact of switching from through-hole to surface-mount packaging?

A: The transition from 28-CDIP through-hole to 32-PLCC surface-mount requires PCB redesign, including footprint modification, trace routing adjustments, and reflow soldering process implementation. Assembly procedures and equipment compatibility must be evaluated.

Q: Does the 7204L12JG meet current regulatory requirements?

A: Yes. The 7204L12JG is ROHS3 compliant, whereas the 7204L20TDB is RoHS non-compliant. This substitution addresses regulatory compliance for new designs and system updates.

Q: Are there inventory considerations for component selection?

A: The 7204L20TDB has 906 pieces in stock as new original inventory. The 7204L12JG has 1376 pieces available. Long-term availability favors the active-status substitute device.