Equivalent & Substitute Parts for 7133LA55PFI8

Part Overview

The 7133LA55PFI8 is a 32Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation in a 100-TQFP package. This parallel memory IC operates with a 55 ns access time and write cycle time, designed for applications requiring volatile memory with dual-port architecture. The part is currently obsolete, making identification of compatible substitutes essential for system maintenance, redesign, and procurement planning.

Substiute Parts

7133LA55PFI8

Renesas Electronics CorporationIn Stock: 10417133LA55PFI8 Datasheet

Current PartRFQ

7133LA25PFGI8

Renesas Electronics CorporationIn Stock: 9077133LA25PFGI8 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7133LA55PFI8 is determined by the following critical parameters:

• Memory capacity (32Kbit) and organization (2K x 16) must remain identical
• Dual-port asynchronous SRAM architecture must be preserved
• Package type must be 100-TQFP (14x14) for mechanical and electrical compatibility
• Supply voltage range (4.5V ~ 5.5V) must be maintained
• Operating temperature range (-40°C ~ 85°C) must be supported
• Access time and write cycle time may be equal to or faster than the original specification

The 7133LA25PFGI8 qualifies as a direct substitute based on these criteria. It maintains identical memory capacity, organization, package, voltage, and temperature specifications while offering improved performance through faster access and write cycle times (25 ns versus 55 ns).

Parameter Comparison

Engineering Selection Recommendations

The 7133LA25PFGI8 is the qualified substitute for the obsolete 7133LA55PFI8. Selection of this substitute is supported by the following factors:

• Active product status ensures ongoing availability and supply chain continuity
• ROHS3 compliance meets current environmental and regulatory requirements, whereas the original part is non-compliant
• Identical electrical and mechanical specifications guarantee direct compatibility in existing designs
• Improved performance characteristics (25 ns versus 55 ns) provide enhanced speed margins without design modification
• Identical moisture sensitivity level (MSL 3) maintains handling and storage requirements

Frequently Asked Questions (FAQ)

Q: Can the 7133LA25PFGI8 be used as a direct replacement for the 7133LA55PFI8?

A: Yes. Both parts share identical memory capacity (32Kbit), organization (2K x 16), package type (100-TQFP), supply voltage (4.5V ~ 5.5V), and operating temperature range (-40°C ~ 85°C). The substitute offers faster access and write cycle times, which are backward-compatible with designs specified for 55 ns operation.

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

A: The 7133LA25PFGI8 provides faster memory access and write cycle times (25 ns) compared to the 7133LA55PFI8 (55 ns). Additionally, the substitute is an active product with ROHS3 compliance, whereas the original is obsolete and non-compliant.

Q: Are there any packaging differences between the original and substitute?

A: No. Both parts use the 100-TQFP (14x14) surface-mount package. The substitute is supplied in Tape & Reel (TR) packaging format, which is standard for active production parts.

Q: Will the faster access time of the substitute cause any compatibility issues?

A: No. Faster memory access times are backward-compatible with designs specified for slower operation. The substitute will not introduce timing violations in circuits designed for the original 55 ns specification.

Q: What is the moisture sensitivity level for both parts?

A: Both the 7133LA55PFI8 and 7133LA25PFGI8 have a Moisture Sensitivity Level (MSL) of 3, requiring storage at controlled humidity for up to 168 hours before soldering.