Renesas Electronics 7130SA35C SRAM Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7130SA35C is an 8Kbit dual-port asynchronous SRAM with parallel interface, organized as 1K x 8, featuring 35 ns access time and 48-DIP through-hole packaging. This part is classified as obsolete, making substitute identification necessary for ongoing system support and new design implementations. The 48-SIDE BRAZED package and through-hole mounting configuration are primary considerations when evaluating alternative components.

Key Parameters

Parameter	Value
Memory Size	8Kbit
Memory Organization	1K x 8
Memory Type	Volatile SRAM
Technology	SRAM - Dual Port, Asynchronous
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	48-DIP (0.600", 15.24mm)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 7130SA35C is determined by the following core parameters:

Memory capacity: 8Kbit minimum
Memory organization: 1K x 8 configuration
Memory type: Volatile SRAM with dual-port asynchronous architecture
Memory interface: Parallel interface requirement
Voltage supply: 4.5V ~ 5.5V compatibility
Operating temperature range: 0°C ~ 70°C minimum coverage
Access time: Equal to or faster than 35 ns
Write cycle time: Equal to or faster than 35 ns

The identified substitute, Renesas Electronics 7130LA20JG, meets all core electrical and functional parameters. However, it differs in mounting technology (surface mount vs. through-hole) and packaging format (52-PLCC vs. 48-DIP), which represents a significant mechanical change requiring PCB redesign.

Parameter Comparison

Parameter	7130SA35C (Main Part)	7130LA20JG (Substitute)
Memory Size	8Kbit	8Kbit
Memory Organization	1K x 8	1K x 8
Memory Type	Volatile SRAM	Volatile SRAM
Technology	SRAM - Dual Port, Asynchronous	SRAM - Dual Port, Asynchronous
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 / Case	48-DIP (0.600", 15.24mm)	52-LCC (J-Lead)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

The 7130LA20JG qualifies as an electrical and functional substitute based on matching memory capacity, organization, interface type, voltage supply range, and operating temperature specifications. The substitute offers improved performance with 20 ns access and write cycle times, compared to the 35 ns specification of the main part.

However, the transition from through-hole 48-DIP to surface-mount 52-PLCC packaging requires PCB layout modification and assembly process changes. The 7130LA20JG carries active product status and ROHS3 compliance, providing advantages for new designs and regulatory alignment. The increased moisture sensitivity level (MSL 3 vs. MSL 1) requires appropriate handling and storage protocols during manufacturing.

Selection between these parts depends on whether PCB redesign is feasible. For legacy system maintenance requiring identical footprint compatibility, the 7130SA35C remains the only option despite obsolete status. For new designs or systems permitting layout modification, the 7130LA20JG provides superior performance and compliance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 7130LA20JG directly replace the 7130SA35C on existing PCBs?

A: No. The 7130LA20JG uses surface-mount 52-PLCC packaging, while the 7130SA35C uses through-hole 48-DIP packaging. Direct socket substitution is not possible without PCB redesign and assembly process modification.

Q: Are the electrical specifications compatible between these parts?

A: Yes. Both parts share identical memory capacity (8Kbit), organization (1K x 8), interface type (parallel), voltage supply range (4.5V ~ 5.5V), and operating temperature range (0°C ~ 70°C). The 7130LA20JG provides faster access and write cycle times (20 ns vs. 35 ns).

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

A: The 7130SA35C is RoHS non-compliant, while the 7130LA20JG is ROHS3 compliant. For new designs or systems subject to RoHS regulations, the 7130LA20JG is the appropriate selection.

Q: Does the moisture sensitivity level difference affect component selection?

A: The 7130SA35C has MSL 1 (unlimited moisture sensitivity), while the 7130LA20JG has MSL 3 (168-hour limit). MSL 3 requires controlled storage conditions and time-limited exposure to ambient humidity during manufacturing. This affects handling procedures but does not impact electrical compatibility.

Q: What is the primary reason the 7130SA35C is classified as obsolete?

A: The 7130SA35C is an older through-hole technology component. Renesas has transitioned to surface-mount alternatives like the 7130LA20JG, which offer improved performance, compliance, and manufacturing efficiency.

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