Renesas Electronics 7130LA35C SRAM Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7130LA35C is an 8Kbit dual-port asynchronous SRAM with parallel interface, organized as 1K x 8, featuring 35 ns access time and 35 ns write cycle time. This component operates at 4.5V to 5.5V supply voltage across a 0°C to 70°C temperature range and is housed in a 48-DIP (0.600", 15.24mm) through-hole package with side-brazed construction.

The 7130LA35C is classified as obsolete. Locating equivalent or substitute parts becomes necessary when original inventory is depleted, when design revisions require improved performance characteristics, or when transitioning to active production components with extended availability and compliance certifications.

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	35 ns
Write Cycle Time	35 ns
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Mounting Type	Through Hole
Package Type	48-DIP (0.600", 15.24mm)
RoHS Status	Non-compliant

Substitute Part Grouping Explanation

Substitution of the 7130LA35C is determined by strict equivalence in the following core parameters:

Memory capacity and organization (8Kbit, 1K x 8)
Memory technology (dual-port asynchronous SRAM)
Parallel interface architecture
Supply voltage compatibility (4.5V ~ 5.5V)
Operating temperature range (0°C ~ 70°C)

The identified substitute, Renesas Electronics 7130LA20JG, maintains identical memory specifications and electrical characteristics. However, this substitute introduces differences in access time (20 ns versus 35 ns), write cycle time (20 ns versus 35 ns), mounting technology (surface mount versus through-hole), package format (52-LCC J-Lead versus 48-DIP), and compliance status (RoHS3 compliant versus non-compliant). These differences must be evaluated within the context of the target application's physical and performance requirements.

Parameter Comparison

Parameter	7130LA35C (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	35 ns	20 ns
Write Cycle Time	35 ns	20 ns
Voltage Supply Range	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C
Mounting Type	Through Hole	Surface Mount
Package Type	48-DIP (0.600", 15.24mm)	52-LCC (J-Lead)
Product Status	Obsolete	Active
RoHS Status	Non-compliant	RoHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

The 7130LA20JG serves as a functional substitute for the 7130LA35C based on identical memory capacity, organization, technology, and electrical specifications. The substitute offers improved performance characteristics with faster access and write cycle times (20 ns versus 35 ns), positioning it as a performance-enhanced alternative.

Selection of the 7130LA20JG requires evaluation of the following factors:

The substitute transitions from through-hole to surface-mount technology, necessitating PCB layout and assembly process modifications. The package change from 48-DIP to 52-LCC (J-Lead) introduces different footprint and pinout requirements that must be verified against the target application's design constraints.

The 7130LA20JG carries active product status with RoHS3 compliance certification, providing extended availability and regulatory alignment compared to the obsolete, non-compliant 7130LA35C. The increased moisture sensitivity level (MSL 3 versus MSL 1) requires adherence to specified storage and handling protocols during manufacturing.

Frequently Asked Questions (FAQ)

Q: Can the 7130LA20JG directly replace the 7130LA35C in existing designs?

A: Direct replacement requires PCB redesign. The 7130LA20JG uses surface-mount technology and a 52-LCC package, whereas the 7130LA35C uses through-hole mounting in a 48-DIP package. Pinout verification is mandatory before implementation.

Q: What are the performance implications of substitution?

A: The 7130LA20JG provides faster memory access and write cycle times (20 ns versus 35 ns). Applications with timing-critical operations benefit from this improvement. Designs with timing margins accommodating 35 ns operation remain compatible with the faster substitute.

Q: Are there compliance differences between these parts?

A: The 7130LA35C is RoHS non-compliant, while the 7130LA20JG is RoHS3 compliant. Applications subject to RoHS regulatory requirements must use the 7130LA20JG or equivalent compliant alternatives.

Q: What moisture handling precautions apply to the substitute?

A: The 7130LA20JG carries MSL 3 rating, requiring storage at controlled humidity (≤60% RH) and limiting floor-life exposure to 168 hours after package opening. The original 7130LA35C carries MSL 1 with unlimited floor-life, representing a more relaxed handling requirement.

Q: Are there other substitutes available for the 7130LA35C?

A: The 7130LA20JG documentation references additional substitutes (7130LA25JGI, 7140LA20JG). Detailed parameter comparison with these alternatives requires separate technical documentation review.

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