Equivalent & Substitute Parts for 71321LA55TF8

Part Overview

The 71321LA55TF8 is a 16Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation in a 64-TQFP (10x10) surface mount package. This part is classified as obsolete, which necessitates identification of equivalent substitute components for ongoing system support and new design implementations. The primary reason for seeking alternatives is the discontinued product status, which impacts long-term availability and supply chain reliability.

Substiute Parts

71321LA55TF8

Renesas Electronics CorporationIn Stock: 95971321LA55TF8 Datasheet

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71321LA20TFG8

Renesas Electronics CorporationIn Stock: 81771321LA20TFG8 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 71321LA55TF8 is determined by the following critical parameters:

• Memory capacity and organization (16Kbit, 2K x 8 configuration)
• Dual-port asynchronous SRAM technology
• Parallel memory interface
• 64-TQFP (10x10) package footprint and surface mount compatibility
• Supply voltage range (4.5V ~ 5.5V)
• Operating temperature range (0°C ~ 70°C)

The 71321LA20TFG8 qualifies as a direct substitute because it maintains identical memory capacity, organization, technology, interface type, package, voltage specifications, and temperature range. The primary difference is improved access time and write cycle time performance (20 ns versus 55 ns), which represents a performance upgrade rather than a compatibility limitation.

Parameter Comparison

Engineering Selection Recommendations

The 71321LA20TFG8 is the qualified substitute for the 71321LA55TF8. Selection of this substitute is supported by the following factors:

• Active product status ensures continued availability and supply chain stability
• ROHS3 compliance meets current environmental and regulatory requirements, whereas the main part is RoHS non-compliant
• Identical electrical and mechanical specifications guarantee direct functional compatibility
• Improved access time and write cycle time (20 ns) provide performance headroom beyond the original 55 ns specification
• Tape & Reel packaging format supports automated assembly processes for production environments

The substitute part introduces no compatibility risks and delivers enhanced performance characteristics while addressing obsolescence and regulatory compliance concerns.

Frequently Asked Questions (FAQ)

Q: Can the 71321LA20TFG8 be used as a direct replacement for the 71321LA55TF8 in existing designs?

A: Yes. Both parts share identical memory capacity (16Kbit), organization (2K x 8), technology (dual-port asynchronous SRAM), parallel interface, package (64-TQFP), voltage range (4.5V ~ 5.5V), and operating temperature range (0°C ~ 70°C). The faster access time of the substitute part does not create compatibility issues.

Q: What is the primary difference between these two parts?

A: The 71321LA20TFG8 offers improved access time and write cycle time performance (20 ns versus 55 ns). Additionally, the substitute part is active in production, ROHS3 compliant, and supplied in Tape & Reel format, whereas the main part is obsolete and RoHS non-compliant.

Q: Are there any timing considerations when substituting the 71321LA20TFG8 for the 71321LA55TF8?

A: No. The faster access time of the substitute part (20 ns) is a performance improvement that does not introduce timing violations in circuits designed for the original 55 ns specification.

Q: Does the Tape & Reel packaging of the 71321LA20TFG8 affect compatibility?

A: No. Tape & Reel is a packaging and delivery format for automated assembly. The physical package type (64-TQFP) and component footprint remain identical, ensuring PCB-level compatibility.

Q: Is the 71321LA20TFG8 suitable for new designs?

A: Yes. The active product status, ROHS3 compliance, and superior performance characteristics make this part appropriate for new design implementations.