Renesas Electronics 7130LA55J SRAM Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7130LA55J is an 8Kbit dual-port asynchronous SRAM memory IC in a 52-PLCC package with 55 ns access time. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support, redesigns, and production continuity. The part operates within a 4.5V to 5.5V supply range and is suitable for parallel memory interface applications requiring volatile storage.

Key Parameters

Parameter	Value
Memory Type	Volatile SRAM
Memory Format	Dual Port, Asynchronous
Memory Size	8Kbit
Memory Organization	1K 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
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the 7130LA55J is determined by strict equivalence across the following critical parameters:

Memory capacity and organization (8Kbit, 1K x 8 configuration)
Dual-port asynchronous SRAM technology
Parallel memory interface
52-PLCC package footprint and pinout compatibility
Supply voltage range (4.5V ~ 5.5V)
Operating temperature range (0°C ~ 70°C)

The 7130LA20JG qualifies as a direct substitute because it maintains identical memory specifications, package geometry, and electrical operating parameters. The primary difference is improved access time performance (20 ns versus 55 ns), which represents a performance upgrade rather than a functional incompatibility. Both parts share the same base product number (7130LA) and are manufactured by Renesas Electronics Corporation.

Parameter Comparison

Parameter	7130LA55J (Main Part)	7130LA20JG (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Type	Volatile SRAM	Volatile SRAM
Memory Format	Dual Port, Asynchronous	Dual Port, Asynchronous
Memory Size	8Kbit	8Kbit
Memory Organization	1K x 8	1K 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
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The 7130LA20JG is the qualified substitute for the obsolete 7130LA55J. Selection is based on the following engineering criteria:

Functional Equivalence: Both parts maintain identical memory capacity, organization, interface type, and electrical operating parameters.
Active Product Status: The 7130LA20JG is classified as active, ensuring ongoing availability and supply chain continuity.
Regulatory Compliance: The substitute part is ROHS3 compliant, whereas the original part is non-compliant. This compliance status is relevant for applications subject to RoHS regulations.
Performance Improvement: The 20 ns access and write cycle time of the substitute represents a performance upgrade that is backward-compatible with systems designed for the 55 ns specification.
Package Compatibility: Both parts use identical 52-PLCC (J-Lead) packaging, ensuring direct PCB footprint compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the 7130LA20JG be used as a direct replacement for the 7130LA55J?

A: Yes. Both parts are functionally equivalent 8Kbit dual-port asynchronous SRAM devices with identical memory organization, parallel interface, supply voltage range, operating temperature range, and 52-PLCC package specifications. The substitute part offers improved access time performance.

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

A: The access time and write cycle time differ: the 7130LA55J operates at 55 ns, while the 7130LA20JG operates at 20 ns. This represents a performance upgrade with no functional incompatibility.

Q: Are there any package or pinout differences?

A: No. Both parts use the 52-PLCC (J-Lead) package with identical footprint dimensions (19.13 x 19.13 mm) and pinout configuration. No PCB modifications are required for substitution.

Q: What is the significance of the RoHS compliance difference?

A: The original 7130LA55J is RoHS non-compliant, while the 7130LA20JG is ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the substitute part meets current environmental and material restriction standards.

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

A: Yes. Both parts operate within 4.5V to 5.5V supply voltage and 0°C to 70°C operating temperature ranges, ensuring electrical compatibility in existing circuit designs.

Q: Why is the original part classified as obsolete?

A: The 7130LA55J is no longer in active production. The 7130LA20JG, with improved performance specifications and active product status, represents the current equivalent offering from Renesas Electronics Corporation.

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