Equivalent & Substitute Parts for Renesas 7133LA55G/S2703

Part Overview

The Renesas 7133LA55G/S2703 is a 32Kbit dual-port asynchronous SRAM memory IC with parallel interface, specified for 55 ns access time and packaged in 68-PGA through-hole configuration. This component is classified as obsolete product status. Identification of equivalent and substitute parts is necessary due to obsolescence and potential supply discontinuation. Substitute parts must maintain functional compatibility through equivalent memory capacity, organization, interface type, and electrical specifications while accommodating packaging and performance variations.

Substiute Parts

7133LA55G/S2703

Renesas Electronics CorporationIn Stock: 12447133LA55G/S2703 Datasheet

Current PartRFQ

7133LA20JG

Renesas Electronics CorporationIn Stock: 9957133LA20JG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7133LA55G/S2703 is determined by the following mandatory parameters:

Core Compatibility Parameters:

• Memory Type: Volatile SRAM (must match)
• Memory Format: Dual Port, Asynchronous (must match)
• Memory Size: 32Kbit (must match)
• Memory Organization: 2K x 16 (must match)
• Memory Interface: Parallel (must match)
• Supply Voltage Range: 4.5V ~ 5.5V (must match)
• Operating Temperature Range: 0°C ~ 70°C (must match)

Variable Parameters (Allowed to Differ):

• Access Time: Substitute parts with equal or faster (lower) access time are acceptable
• Mounting Type: Through hole and surface mount variants are both acceptable
• Package Type: Different package configurations are acceptable provided pin count and electrical interface remain compatible
• Product Status: Active product status is preferred for substitute selection

The substitute part 7133LA20JG meets all core compatibility requirements with improved access time specification (20 ns versus 55 ns).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 7133LA20JG

The 7133LA20JG is the manufacturer-recommended substitute for the 7133LA55G/S2703. Selection rationale is based on the following factors:

1. Functional Equivalence: All core memory parameters are identical, including capacity (32Kbit), organization (2K x 16), interface type (parallel), and electrical specifications (4.5V ~ 5.5V supply, 0°C ~ 70°C operating range).

2. Performance Enhancement: The substitute provides superior access time (20 ns versus 55 ns) and write cycle time (20 ns versus 55 ns), enabling operation in timing-critical applications.

3. Product Status: The substitute maintains active product status, ensuring continued availability and supply chain reliability compared to the obsolete main part.

4. Regulatory Compliance: The substitute is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

5. Packaging Consideration: The substitute uses 68-PLCC surface-mount packaging (24.21x24.21) versus the through-hole 68-PGA configuration (29.46x29.46) of the main part. PCB layout and assembly process modifications are required.

Frequently Asked Questions (FAQ)

Q: Can the 7133LA20JG directly replace the 7133LA55G/S2703 without circuit modifications?

A: Electrical and functional compatibility is maintained. However, the packaging change from 68-PGA through-hole to 68-PLCC surface-mount requires PCB redesign and assembly process changes. Pin-to-pin electrical compatibility exists, but physical mounting differs.

Q: What is the significance of the faster access time in the substitute part?

A: The 7133LA20JG provides 20 ns access time compared to 55 ns in the original part. This represents improved performance and enables the substitute to operate in applications with tighter timing requirements. Systems designed for the original 55 ns specification will operate correctly with the faster substitute.

Q: Are there any voltage or temperature compatibility issues between the main part and substitute?

A: No. Both parts operate within identical supply voltage range (4.5V ~ 5.5V) and temperature range (0°C ~ 70°C). Electrical interface compatibility is maintained.

Q: What does the ROHS3 compliance of the substitute part indicate?

A: ROHS3 compliance indicates the substitute part meets Restriction of Hazardous Substances Directive requirements, restricting use of specified hazardous materials. The original part's compliance status is not specified in available documentation.

Q: How does the package size difference affect board design?

A: The 68-PLCC package (24.21x24.21) is smaller than the 68-PGA package (29.46x29.46). Surface-mount assembly requires different soldering processes and PCB footprint design compared to through-hole mounting. Board layout optimization may be possible due to reduced package size.

Q: Is the 7133LA20JG the only available substitute?

A: Based on provided documentation, the 7133LA20JG is the manufacturer-recommended substitute. Additional equivalent parts may exist from other manufacturers, but only the specified substitute is documented in this reference.

Q: What is the Moisture Sensitivity Level (MSL) rating, and why does it matter?

A: The substitute part carries MSL 3 rating (168 hours), indicating moisture sensitivity during storage and handling. This requires controlled storage conditions and specific handling procedures during assembly to prevent moisture-induced failures. The original part's MSL rating is not specified.