Renesas Electronics 7024L35J SRAM 64Kbit Parallel Memory IC - Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7024L35J is a 64Kbit dual-port asynchronous SRAM memory IC in 84-PLCC surface mount packaging. This component is classified as obsolete, indicating it has been discontinued by the manufacturer. The 35 ns access time and parallel interface make it suitable for legacy embedded systems and industrial applications requiring volatile memory storage. Due to its obsolete status, identifying compatible substitute parts is essential for system maintenance, repair, and redesign efforts.

Key Parameters

Parameter	Value
Memory Type	Volatile SRAM
Memory Format	Dual Port, Asynchronous
Memory Size	64Kbit
Memory Organization	4K x 16
Memory Interface	Parallel
Access Time	35 ns
Write Cycle Time	35 ns
Supply Voltage	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	84-PLCC (J-Lead)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the 7024L35J is determined by strict equivalence across the following critical parameters:

Memory capacity and organization (64Kbit, 4K x 16 configuration)
Dual-port asynchronous SRAM architecture
Parallel interface connectivity
84-PLCC surface mount package with identical pinout
Supply voltage range (4.5V ~ 5.5V)
Operating temperature range (0°C ~ 70°C)

The Renesas Electronics 7024L15JG qualifies as a direct substitute because it maintains identical memory capacity, organization, interface type, package, voltage specifications, and temperature range. The 7024L15JG offers improved performance with a 15 ns access time and write cycle time, representing a faster variant of the same product line. This performance enhancement is backward-compatible with applications designed for the 7024L35J.

Parameter Comparison

Parameter	7024L35J (Main Part)	7024L15JG (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Type	Volatile SRAM	Volatile SRAM
Memory Format	Dual Port, Asynchronous	Dual Port, Asynchronous
Memory Size	64Kbit	64Kbit
Memory Organization	4K x 16	4K x 16
Memory Interface	Parallel	Parallel
Access Time	35 ns	15 ns
Write Cycle Time	35 ns	15 ns
Supply Voltage	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C
Package Type	84-PLCC (J-Lead)	84-PLCC (J-Lead)
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging	Not specified	Tube

Engineering Selection Recommendations

The 7024L35J is obsolete and no longer manufactured. The Renesas Electronics 7024L15JG is the recommended substitute for new designs, repairs, and system maintenance.

Selection rationale:

The 7024L15JG maintains full electrical and mechanical compatibility with the 7024L35J across all critical parameters.
The 7024L15JG is in active production status, ensuring long-term availability and supply chain reliability.
The 7024L15JG achieves ROHS3 compliance, meeting modern environmental and regulatory standards, whereas the 7024L35J is RoHS non-compliant.
The 7024L15JG provides superior performance with 15 ns access and write cycle times compared to the 7024L35J's 35 ns specification. This performance improvement is backward-compatible with existing circuit designs.
Both parts share identical pinout, package dimensions (29.31x29.31 mm), and supply voltage requirements, enabling direct board-level substitution without design modification.

Frequently Asked Questions (FAQ)

Q: Can the 7024L15JG be used as a direct replacement for the 7024L35J without circuit modification?

A: Yes. The 7024L15JG is electrically and mechanically compatible with the 7024L35J. Both parts feature identical pinout, 84-PLCC packaging, supply voltage range (4.5V ~ 5.5V), and operating temperature range (0°C ~ 70°C). The faster access time of the 7024L15JG does not create compatibility issues in applications designed for the 7024L35J.

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

A: The primary difference is access time and write cycle time. The 7024L35J operates at 35 ns, while the 7024L15JG operates at 15 ns. The 7024L15JG also offers improved regulatory compliance with ROHS3 certification, whereas the 7024L35J is RoHS non-compliant.

Q: Why is the 7024L35J listed as obsolete?

A: The 7024L35J has been discontinued by Renesas Electronics Corporation. Obsolete status indicates the manufacturer no longer produces this component. The 7024L15JG represents the active production alternative within the same product family.

Q: Are there any packaging differences between these parts?

A: Both parts use 84-PLCC surface mount packaging with identical dimensions (29.31x29.31 mm). The 7024L15JG is supplied in tube packaging, while the 7024L35J packaging specification is not detailed in available documentation.

Q: Will the faster speed of the 7024L15JG cause any issues in my application?

A: No. Faster memory access times are backward-compatible with applications designed for slower components. The 7024L15JG will not introduce timing violations or functional problems in circuits originally designed for the 7024L35J.

Q: What compliance certifications apply to each part?

A: The 7024L35J is RoHS non-compliant. The 7024L15JG is ROHS3 compliant. Both parts are REACH unaffected and classified under ECCN EAR99 for export control purposes.

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