Renesas Electronics 7133LA55PF8 SRAM Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7133LA55PF8 is a 32Kbit dual-port asynchronous SRAM memory IC in a 100-TQFP surface mount package. This component provides parallel memory interface with 55 ns access time and operates across the 4.5V to 5.5V supply voltage range. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations where this memory architecture remains applicable.

Substiute Parts

7133LA55PF8

Renesas Electronics CorporationIn Stock: 8407133LA55PF8 Datasheet

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7133LA20PFG8

Renesas Electronics CorporationIn Stock: 9177133LA20PFG8 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7133LA55PF8 is determined by the following critical parameters:

• Memory capacity and organization (32Kbit, 2K x 16 configuration)
• Dual-port asynchronous SRAM architecture
• Parallel memory interface
• 100-TQFP package footprint and pinout compatibility
• Supply voltage compatibility (4.5V ~ 5.5V range)
• Moisture sensitivity classification (MSL 3)

The 7133LA20PFG8 qualifies as a direct substitute based on matching all core electrical and mechanical parameters. The primary distinction is improved access time performance (20 ns versus 55 ns) and extended operating temperature range, representing a performance upgrade rather than a functional limitation.

Parameter Comparison

Engineering Selection Recommendations

The 7133LA20PFG8 is the qualified substitute for the 7133LA55PF8 based on the following engineering criteria:

Functional Compatibility: Both parts share identical memory capacity, organization, interface architecture, and package specifications. Pin-level compatibility is maintained across the 100-TQFP footprint.

Performance Upgrade: The substitute provides faster access and write cycle times (20 ns versus 55 ns), which represents improved performance characteristics suitable for applications previously constrained by the original part's timing specifications.

Compliance Status: The substitute achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. For new designs or systems requiring regulatory compliance, the 7133LA20PFG8 is the appropriate selection.

Product Availability: The substitute maintains active product status with confirmed inventory availability, whereas the original part is obsolete. For ongoing procurement and system support, the 7133LA20PFG8 ensures supply chain continuity.

Operating Temperature Range: The substitute extends the operating temperature range to -55°C ~ 125°C compared to the original 0°C ~ 70°C specification, providing broader environmental applicability.

Frequently Asked Questions (FAQ)

Q: Can the 7133LA20PFG8 directly replace the 7133LA55PF8 in existing designs?

A: Yes. Both parts maintain identical pinout, package footprint (100-TQFP), memory capacity (32Kbit), organization (2K x 16), and supply voltage requirements (4.5V ~ 5.5V). The substitute is electrically and mechanically compatible for direct board-level replacement.

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

A: The 7133LA20PFG8 provides faster memory access and write cycle times (20 ns versus 55 ns) and extends the operating temperature range to -55°C ~ 125°C. The substitute also achieves ROHS3 compliance, whereas the original part does not.

Q: Are there any timing considerations when substituting the 7133LA20PFG8?

A: The substitute's faster access time (20 ns) is backward compatible with designs specified for 55 ns operation. No timing violations occur when replacing a slower part with a faster equivalent. System timing margins improve with the substitute.

Q: What is the packaging difference between these parts?

A: The main part (7133LA55PF8) is supplied in standard packaging, while the substitute (7133LA20PFG8) is supplied in Tape & Reel (TR) format. Both use identical 100-TQFP (14x14) package geometry and are surface mount components.

Q: Are both parts suitable for new designs?

A: The 7133LA20PFG8 is the appropriate selection for new designs. The original part is classified as obsolete and should not be specified for new development. The substitute provides active product status, improved compliance, and superior performance characteristics.

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

A: Both the 7133LA55PF8 and 7133LA20PFG8 are classified as MSL 3 (168 Hours), indicating identical moisture handling and storage requirements during manufacturing and assembly processes.