Equivalent & Substitute Parts for Renesas 7134LA35J

Part Overview

The Renesas 7134LA35J is a 32Kbit dual-port asynchronous SRAM with parallel interface, housed in a 52-PLCC package. This component is classified as obsolete, making equivalent or substitute parts necessary for ongoing system support, maintenance, and new production runs where legacy compatibility is required.

Substiute Parts

7134LA35J

Renesas Electronics CorporationIn Stock: 12087134LA35J Datasheet

Current PartRFQ

7134LA70J

Renesas Electronics CorporationIn Stock: 9327134LA70J Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 7134LA35J is determined by strict equivalence across the following critical parameters:

• Memory capacity and organization (32Kbit, 4K x 8)
• Dual-port asynchronous SRAM architecture
• Parallel interface configuration
• 52-PLCC package footprint and pinout compatibility
• Supply voltage range (4.5V ~ 5.5V)
• Operating temperature range (0°C ~ 70°C)
• Surface mount mounting type

The 7134LA70J qualifies as a substitute based on identical memory specifications, package, and electrical characteristics. The primary difference is access time and write cycle time specification (70 ns versus 35 ns), which represents a slower speed grade of the same base product family.

Parameter Comparison

Engineering Selection Recommendations

Both the 7134LA35J and 7134LA70J are classified as obsolete products. Selection between these parts depends on system timing requirements:

The 7134LA35J operates at 35 ns access and write cycle times and is suitable for applications requiring faster memory response. The 7134LA70J operates at 70 ns and is suitable for applications with less stringent timing constraints.

Both parts share identical electrical specifications, package geometry, and compliance ratings. Neither part is RoHS compliant, and both carry MSL rating 3. Substitution is electrically and mechanically valid when timing requirements of the target application are compatible with the slower 70 ns specification of the 7134LA70J.

Frequently Asked Questions (FAQ)

Q: Can the 7134LA70J replace the 7134LA35J in all applications?

A: Electrical and mechanical compatibility is confirmed. Substitution is valid only if the application timing budget accommodates the 70 ns access and write cycle time specification. Systems designed for 35 ns operation may experience timing violations with the 70 ns part.

Q: Are the package dimensions identical between these parts?

A: Yes. Both parts use the 52-PLCC (J-Lead) package with dimensions 19.13 x 19.13 mm. Footprint and pinout are identical, enabling direct board-level substitution.

Q: What is the significance of the MSL rating for these parts?

A: Both parts carry MSL rating 3 with a 168-hour floor life. This indicates moisture sensitivity requiring controlled storage and handling conditions. Parts must be stored in dry conditions and baked before reflow soldering if floor life is exceeded.

Q: Are there any compliance differences between these substitute parts?

A: Both parts are RoHS non-compliant and REACH unaffected. Compliance status is identical, and no regulatory advantage exists between the two options.

Q: What is the base product number relationship?

A: Both the 7134LA35J and 7134LA70J share the base product number 7134LA. The suffix designates the speed grade (35 ns or 70 ns). This indicates they are members of the same product family with different performance specifications.