Equivalent & Substitute Parts for 7134SA45J

Part Overview

The 7134SA45J is a 32Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation in a 52-PLCC surface mount package. This memory IC operates with a 45 ns access time and write cycle time, supporting parallel data interfaces in 4K x 8 organization. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for legacy system maintenance and component sourcing.

Substiute Parts

7134SA45J

Renesas Electronics CorporationIn Stock: 8857134SA45J Datasheet

Current PartRFQ

7134LA70J

Renesas Electronics CorporationIn Stock: 9327134LA70J Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7134SA45J is determined by the following critical parameters:

• Memory capacity (32Kbit) and organization (4K x 8)
• Dual-port asynchronous SRAM technology
• Parallel interface configuration
• 52-PLCC package footprint and J-Lead form factor
• Supply voltage range (4.5V ~ 5.5V)
• Operating temperature range (0°C ~ 70°C)

The 7134LA70J qualifies as a substitute based on matching all structural and electrical parameters. The primary difference is the access time and write cycle time specification of 70 ns versus the original 45 ns, representing a slower speed grade within the same product family.

Parameter Comparison

Engineering Selection Recommendations

Both the 7134SA45J and 7134LA70J are classified as obsolete products and are RoHS non-compliant. Selection between these parts depends on system timing requirements. The 7134SA45J operates at 45 ns access and write cycle times, while the 7134LA70J operates at 70 ns. Systems designed for the faster 45 ns specification will function with the 70 ns substitute only if timing margins permit the additional 25 ns latency. Both parts share identical package geometry, electrical supply requirements, and temperature operating ranges, ensuring mechanical and electrical compatibility at the board level.

Frequently Asked Questions (FAQ)

Q: Can the 7134LA70J directly replace the 7134SA45J in existing designs?

A: Physical and electrical compatibility is confirmed. The 7134LA70J matches the 52-PLCC package footprint, supply voltage range, and operating temperature specifications. Functional compatibility depends on system timing requirements, as the 7134LA70J introduces 25 ns additional latency in access and write cycle times.

Q: Are there differences in packaging between these parts?

A: Both parts use the 52-PLCC (J-Lead) surface mount package with identical dimensions (19.13x19.13 mm). The 7134SA45J is supplied in standard packaging, while the 7134LA70J is supplied in tube packaging. Pin configuration and footprint are identical.

Q: What is the significance of the speed grade difference?

A: The 45 ns and 70 ns designations refer to access time and write cycle time specifications. The 7134SA45J is the faster variant. Applications with strict timing constraints may not tolerate the slower 70 ns specification of the 7134LA70J.

Q: Do both parts have the same compliance certifications?

A: Both parts share identical RoHS status (non-compliant), REACH status (unaffected), MSL rating (3), ECCN (EAR99), and HTSUS classification (8542.32.0041).

Q: What is the memory organization of these parts?

A: Both the 7134SA45J and 7134LA70J are organized as 4K x 8, providing 32Kbit total capacity with 8-bit parallel data width and 12-bit address lines.