Renesas Electronics 7132LA55J SRAM 16Kbit Parallel Memory IC - Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7132LA55J is a 16Kbit dual-port asynchronous SRAM memory IC in 52-PLCC surface mount packaging. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs. The part operates within a 4.5V to 5.5V supply voltage range with 55 ns access time and write cycle performance. Due to its obsolete status, sourcing equivalent or upgraded alternatives is essential for production continuity and design flexibility.

Key Parameters

Parameter	Value
Memory Type	Volatile SRAM
Memory Format	Dual Port, Asynchronous
Memory Size	16Kbit
Memory Organization	2K x 8
Memory Interface	Parallel
Access Time	55 ns
Write Cycle Time	55 ns
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	52-PLCC (J-Lead)
Mounting Type	Surface Mount
Physical Dimensions	19.13 x 19.13 mm

Substitute Part Grouping Explanation

Substitution eligibility for the 7132LA55J is determined by strict equivalence across the following critical parameters:

Memory capacity and organization (16Kbit, 2K x 8 configuration)
Dual-port asynchronous SRAM technology
Parallel memory interface
52-PLCC surface mount package with identical physical dimensions (19.13 x 19.13 mm)
Supply voltage compatibility (4.5V ~ 5.5V range)
Operating temperature range (0°C ~ 70°C)

The substitute part 7132LA20JG meets all these criteria. This part shares the identical memory architecture, packaging, and electrical operating parameters as the main part. The primary distinction is improved access time and write cycle performance (20 ns versus 55 ns), which represents a performance upgrade rather than a functional deviation. This faster timing specification maintains full backward compatibility with applications designed for the 7132LA55J.

Parameter Comparison

Parameter	7132LA55J (Main Part)	7132LA20JG (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Type	Volatile SRAM	Volatile SRAM
Memory Format	Dual Port, Asynchronous	Dual Port, Asynchronous
Memory Size	16Kbit	16Kbit
Memory Organization	2K x 8	2K x 8
Memory Interface	Parallel	Parallel
Access Time	55 ns	20 ns
Write Cycle Time	55 ns	20 ns
Voltage Supply Range	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C
Package Type	52-PLCC (J-Lead)	52-PLCC (J-Lead)
Mounting Type	Surface Mount	Surface Mount
Physical Dimensions	19.13 x 19.13 mm	19.13 x 19.13 mm
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

The 7132LA20JG is the direct functional equivalent and recommended substitute for the obsolete 7132LA55J. Selection rationale is based on the following engineering factors:

Product Status: The 7132LA20JG maintains active product status with Renesas Electronics Corporation, ensuring ongoing availability and supply chain stability. The 7132LA55J is classified as obsolete, creating sourcing risk for future production requirements.

Compliance and Certifications: The 7132LA20JG achieves ROHS3 compliance, meeting current environmental and regulatory standards. The 7132LA55J is RoHS non-compliant, which may present regulatory barriers in certain markets and applications.

Electrical and Functional Equivalence: Both parts operate identically across all critical parameters: memory capacity, organization, interface type, supply voltage range, and operating temperature. The 52-PLCC package dimensions are identical, ensuring direct PCB compatibility without layout modifications.

Performance Characteristics: The 7132LA20JG provides improved access time and write cycle performance (20 ns) compared to the 7132LA55J (55 ns). This represents a performance upgrade that maintains full backward compatibility with existing designs, as faster memory access does not introduce timing violations in systems designed for the slower specification.

Moisture Sensitivity: Both parts share identical MSL rating (3, 168 Hours), requiring equivalent handling and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the 7132LA20JG be used as a direct replacement for the 7132LA55J without PCB modifications?

A: Yes. Both parts use identical 52-PLCC packaging with matching physical dimensions (19.13 x 19.13 mm). Pin configuration, electrical interface, and mounting footprint are equivalent, enabling direct substitution without PCB layout changes.

Q: What is the significance of the access time difference between 55 ns and 20 ns?

A: The 7132LA20JG provides faster memory access and write cycle performance. This represents a performance upgrade that is fully compatible with applications designed for the 7132LA55J. Faster memory timing does not create timing violations in systems expecting slower response times.

Q: Are the supply voltage and operating temperature ranges identical?

A: Yes. Both parts operate within 4.5V to 5.5V supply voltage range and 0°C to 70°C operating temperature range. Electrical operating parameters are fully equivalent.

Q: What is the impact of RoHS compliance differences?

A: The 7132LA20JG achieves ROHS3 compliance, meeting current environmental regulations and market requirements. The 7132LA55J is RoHS non-compliant, which may restrict use in regulated markets or applications with environmental compliance mandates.

Q: Are there any differences in moisture sensitivity handling?

A: No. Both parts carry identical MSL rating of 3 (168 Hours), requiring equivalent moisture control, storage, and handling procedures during manufacturing and assembly.

Q: Why is the 7132LA55J classified as obsolete?

A: Obsolete status indicates that Renesas Electronics Corporation has discontinued active production and support for this part number. The 7132LA20JG represents the active equivalent within the same product family, ensuring continued availability and manufacturer support.

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