Equivalent & Substitute Parts for Renesas 7140SA20J8 SRAM Memory IC

Part Overview

The Renesas 7140SA20J8 is an 8Kbit dual-port asynchronous SRAM memory IC in a 52-PLCC package with 20 ns access time and parallel interface. This part is classified as obsolete, making substitute components necessary for new designs, maintenance, or production continuity. The 7140SA20J8 operates within a 4.5V to 5.5V supply range and is suitable for applications requiring volatile parallel memory with fast access characteristics.

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	20 ns
Write Cycle Time	20 ns
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	52-PLCC (J-Lead)
Mounting Type	Surface Mount
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

The 7140LA20JG8 qualifies as a direct substitute for the 7140SA20J8 based on the following critical parameters:

Memory capacity and organization remain identical at 8Kbit with 1K x 8 configuration
Dual-port asynchronous SRAM technology is preserved
Access time and write cycle time specifications match at 20 ns
Voltage supply range is identical: 4.5V ~ 5.5V
Operating temperature range is identical: 0°C ~ 70°C
Package and mounting type are identical: 52-PLCC surface mount
MSL rating is identical: Level 3 (168 Hours)

The primary distinction is product status and compliance: the 7140LA20JG8 is active production with RoHS3 compliance, whereas the 7140SA20J8 is obsolete and RoHS non-compliant.

Parameter Comparison

Parameter	7140SA20J8 (Main Part)	7140LA20JG8 (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	20 ns	20 ns
Write Cycle Time	20 ns	20 ns
Voltage Supply	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
MSL Rating	3 (168 Hours)	3 (168 Hours)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS3 Compliant
Packaging Option	Standard	Tape & Reel (TR)

Engineering Selection Recommendations

The 7140LA20JG8 is the appropriate selection for applications currently using or requiring the 7140SA20J8 SRAM memory IC. The substitute part maintains full electrical and mechanical compatibility across all specified parameters. The 7140LA20JG8 offers the additional advantage of active product status, ensuring continued availability and supply chain reliability. RoHS3 compliance of the 7140LA20JG8 aligns with current environmental and regulatory standards, whereas the 7140SA20J8 does not meet these requirements. Both parts carry identical REACH unaffected status and EAR99 ECCN classification.

Frequently Asked Questions (FAQ)

Q: Can the 7140LA20JG8 directly replace the 7140SA20J8 in existing designs?

A: Yes. The 7140LA20JG8 maintains identical electrical specifications, memory organization, access timing, voltage supply range, operating temperature range, and 52-PLCC package configuration. No circuit modifications are required.

Q: What is the significance of the product status difference?

A: The 7140SA20J8 is classified as obsolete, indicating Renesas has discontinued production and support. The 7140LA20JG8 is active production, ensuring ongoing availability, technical support, and supply chain continuity.

Q: Does the RoHS compliance difference affect compatibility?

A: No. RoHS compliance is a manufacturing and environmental standard that does not alter the electrical or mechanical function of the component. The 7140LA20JG8 meets RoHS3 requirements, making it suitable for applications with environmental compliance mandates.

Q: Are there packaging differences between these parts?

A: Both parts use the 52-PLCC surface mount package. The 7140LA20JG8 is available in Tape & Reel (TR) packaging for automated assembly, while the 7140SA20J8 uses standard packaging. This does not affect electrical compatibility.

Q: What is the MSL rating and why is it identical?

A: MSL (Moisture Sensitivity Level) 3 indicates the component requires controlled storage conditions for 168 hours maximum before soldering. Both parts carry this identical rating, requiring the same handling and storage protocols.

Q: Are the access time and write cycle time specifications identical?

A: Yes. Both parts specify 20 ns access time and 20 ns write cycle time, ensuring identical performance characteristics in parallel memory applications.

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