Equivalent & Substitute Parts for Renesas 7130LA100CB

Part Overview

The Renesas 7130LA100CB is an 8Kbit dual-port asynchronous SRAM with parallel interface, organized as 1K x 8, packaged in a 48-DIP (0.600", 15.24mm) through-hole configuration. This component operates at 100 ns access time with a supply voltage range of 4.5V to 5.5V and temperature range of -55°C to 125°C. The part is classified as obsolete, making equivalent substitutes necessary for new designs and legacy system maintenance.

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	100 ns
Write Cycle Time	100 ns
Supply Voltage	4.5V – 5.5V
Operating Temperature	-55°C to 125°C
Mounting Type	Through Hole
Package	48-DIP (0.600", 15.24mm)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the 7130LA100CB is determined by the following critical parameters:

Memory Capacity & Organization: Substitute parts must maintain 8Kbit capacity with 1K x 8 organization to ensure functional equivalence in address and data bus requirements.
Memory Technology: Dual-port asynchronous SRAM technology is mandatory for pin-compatible operation.
Electrical Specifications: Supply voltage range (4.5V – 5.5V) and operating temperature range must be met or exceeded by the substitute.
Interface Type: Parallel interface with identical pin configuration is required for direct replacement.
Access Time: Substitute parts may have equal or faster access times; slower access times are not acceptable.

The primary substitute identified is the 7130LA20JG, which shares the same base product number (7130LA) and core memory specifications but differs in packaging format, access time performance, and product status.

Parameter Comparison

Parameter	7130LA100CB (Main)	7130LA20JG (Substitute)
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	100 ns	20 ns
Write Cycle Time	100 ns	20 ns
Supply Voltage	4.5V – 5.5V	4.5V – 5.5V
Operating Temperature	-55°C to 125°C	0°C to 70°C
Mounting Type	Through Hole	Surface Mount
Package	48-DIP (0.600", 15.24mm)	52-LCC (J-Lead)
Product Status	Obsolete	Active
RoHS Status	Non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The 7130LA20JG is functionally equivalent to the 7130LA100CB for core memory operations, with the following considerations:

Advantages of 7130LA20JG:

Active product status ensures long-term availability and supply chain continuity
ROHS3 compliance meets modern environmental and regulatory requirements
Superior access time performance (20 ns vs. 100 ns) provides timing margin in applications
Identical electrical specifications (4.5V – 5.5V supply, parallel interface, 1K x 8 organization)

Design Constraints:

Surface-mount packaging (52-LCC) requires PCB redesign compared to through-hole DIP mounting
Operating temperature range is narrower (0°C to 70°C vs. -55°C to 125°C); unsuitable for extended temperature applications
Moisture sensitivity level (MSL 3, 168 hours) requires controlled storage and handling compared to MSL 1

Selection of the 7130LA20JG is appropriate for new designs and applications operating within the 0°C to 70°C temperature range. Legacy systems requiring through-hole mounting or extended temperature operation require alternative evaluation.

Frequently Asked Questions (FAQ)

Q: Can the 7130LA20JG directly replace the 7130LA100CB in existing PCBs?

A: Direct PCB replacement is not possible due to different mounting types and package formats. The 7130LA100CB uses through-hole 48-DIP mounting, while the 7130LA20JG uses surface-mount 52-LCC (J-Lead) packaging. PCB redesign is required.

Q: What is the significance of the faster access time in the 7130LA20JG?

A: The 7130LA20JG operates at 20 ns access time compared to 100 ns for the 7130LA100CB. This faster performance is backward-compatible; systems designed for 100 ns operation will function correctly with the faster substitute, providing additional timing margin.

Q: Is the 7130LA20JG suitable for industrial temperature applications?

A: No. The 7130LA20JG operates over 0°C to 70°C, limiting use to commercial temperature ranges. The original 7130LA100CB supports -55°C to 125°C. Applications requiring extended temperature operation must identify alternative solutions.

Q: What does ROHS3 compliance mean for the 7130LA20JG?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. This is mandatory for many modern applications and supply chains. The original 7130LA100CB is non-compliant.

Q: Are there pin-count differences between these parts?

A: Yes. The 7130LA100CB is a 48-pin DIP package, while the 7130LA20JG is a 52-pin LCC package. Pin count and pinout differ, requiring full schematic and PCB redesign for substitution.

Q: What is the moisture sensitivity level (MSL) difference?

A: The 7130LA100CB has MSL 1 (unlimited shelf life), while the 7130LA20JG has MSL 3 (168-hour limit after moisture exposure). The substitute requires controlled storage conditions and baking procedures before assembly if moisture absorption occurs.

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