Equivalent & Substitute Parts for Renesas 7134LA45J SRAM Memory IC

Part Overview

The Renesas 7134LA45J is a 32Kbit dual-port asynchronous SRAM memory IC in 52-PLCC surface mount packaging. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system support, maintenance, and legacy equipment repairs. The part operates within a 4.5V to 5.5V supply voltage range with a 45 ns access time specification.

Substiute Parts

7134LA45J

Renesas Electronics CorporationIn Stock: 11027134LA45J Datasheet

Current PartRFQ

7134LA70J

Renesas Electronics CorporationIn Stock: 9327134LA70J Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7134LA45J is determined by the following critical parameters:

• Memory capacity (32Kbit) and organization (4K x 8) must remain identical
• Dual-port asynchronous SRAM technology must be maintained
• Parallel memory interface is required
• Supply voltage range (4.5V ~ 5.5V) must be compatible
• Operating temperature range (0°C ~ 70°C) must be supported
• 52-PLCC surface mount package with J-Lead configuration is mandatory
• Access time specifications may vary within acceptable system timing margins

The 7134LA70J qualifies as a direct substitute based on these parameters. While the access time increases from 45 ns to 70 ns, all other electrical and mechanical specifications remain identical, allowing functional substitution in applications where the slower access time does not violate system timing requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the 7134LA45J and 7134LA70J are obsolete products from Renesas Electronics Corporation. Selection between these parts depends on system timing requirements:

The 7134LA45J provides 45 ns access time and write cycle time, suitable for applications requiring faster memory response. The 7134LA70J operates at 70 ns, introducing a 25 ns timing margin increase. Both parts maintain identical electrical specifications including 4.5V to 5.5V supply voltage, 0°C to 70°C operating temperature range, and 52-PLCC surface mount packaging.

Neither part carries RoHS compliance certification. Both are classified as RoHS non-compliant and REACH Unaffected. Moisture sensitivity level is identical at MSL 3 (168 Hours) for both variants.

Component selection should be based on documented system timing analysis to confirm that the 70 ns access time of the substitute part does not exceed maximum allowable memory access delays in the target application.

Frequently Asked Questions (FAQ)

Q: Can the 7134LA70J directly replace the 7134LA45J in existing designs?

A: Physical and electrical compatibility is confirmed. Both parts use identical 52-PLCC surface mount packaging, supply voltage range (4.5V ~ 5.5V), and operating temperature specifications (0°C ~ 70°C). Functional substitution is possible if system timing analysis confirms that 70 ns access time meets application requirements.

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

A: The access time and write cycle time differ. The 7134LA45J operates at 45 ns while the 7134LA70J operates at 70 ns. All other parameters including memory capacity (32Kbit), organization (4K x 8), interface type (parallel), and packaging remain identical.

Q: Are there any compliance or certification differences?

A: Both parts share identical compliance status. Neither is RoHS compliant, both are REACH Unaffected, and both carry MSL 3 moisture sensitivity rating (168 Hours). No compliance advantage exists between the two variants.

Q: What packaging considerations apply to these parts?

A: Both parts are supplied in 52-PLCC (J-Lead) surface mount packages measuring 19.13 x 19.13 mm. PCB footprint and reflow soldering requirements are identical. The 7134LA70J is available in Tube packaging while the 7134LA45J packaging type is not specified in available data.

Q: How do I determine if the 70 ns access time is acceptable for my application?

A: Review your system's memory timing specifications and maximum allowable access time. If your design specifies a maximum access time of 70 ns or greater, the 7134LA70J is suitable. If your design requires faster access times below 70 ns, the 7134LA45J is required.