Equivalent & Substitute Parts for 71342LA55J

Part Overview

The 71342LA55J is a 32Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation in a 52-PLCC package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs. The device operates with a 55 ns access time and requires a 4.5V to 5.5V supply voltage. Identifying compatible alternatives ensures design continuity and component availability.

Substiute Parts

71342LA55J

Renesas Electronics CorporationIn Stock: 78371342LA55J Datasheet

Current PartRFQ

71342LA20JG

Renesas Electronics CorporationIn Stock: 79371342LA20JG Datasheet

UpgradeRFQ

7134LA70J

Renesas Electronics CorporationIn Stock: 9327134LA70J Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 71342LA55J is determined by strict equivalence in the following parameters:

• Memory capacity: 32Kbit
• Memory organization: 4K x 8
• Technology: SRAM - Dual Port, Asynchronous
• Memory interface: Parallel
• Package: 52-PLCC (19.13x19.13)
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: 0°C ~ 70°C

Access time and write cycle time are performance characteristics that may vary among substitutes. Parts with faster access times (lower nanosecond values) are backward-compatible with designs specified for the 71342LA55J, as they meet or exceed the original timing requirements. Parts with slower access times do not qualify as direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The 71342LA20JG serves as the primary upgrade path for the 71342LA55J. This substitute provides improved performance with a 20 ns access time while maintaining full electrical and mechanical compatibility. The 71342LA20JG carries ROHS3 compliance status, addressing environmental and regulatory requirements that the original part does not meet. Current inventory availability (771 units) supports immediate procurement.

The 7134LA70J is listed as a manufacturer-recommended alternative but operates with a 70 ns access time, which exceeds the original specification. This part is suitable only for applications where timing margins permit slower memory access. The 7134LA70J remains in obsolete status with no RoHS compliance.

For new designs or systems requiring regulatory compliance, the 71342LA20JG is the recommended selection. For legacy system maintenance where timing is non-critical, the 7134LA70J may serve as a functional alternative.

Frequently Asked Questions (FAQ)

Q: Can the 71342LA20JG directly replace the 71342LA55J in existing designs?

A: Yes. The 71342LA20JG is electrically and mechanically compatible with the 71342LA55J. The faster 20 ns access time meets or exceeds the original 55 ns specification, ensuring backward compatibility without design modification.

Q: What is the difference between the 71342LA55J and 7134LA70J?

A: Both are 32Kbit dual-port asynchronous SRAMs in 52-PLCC packages with identical electrical specifications. The primary difference is access time: 71342LA55J operates at 55 ns, while 7134LA70J operates at 70 ns. The 7134LA70J is slower and suitable only for applications with relaxed timing requirements.

Q: Does the 71342LA20JG meet RoHS compliance?

A: Yes. The 71342LA20JG is ROHS3 compliant, whereas the original 71342LA55J is RoHS non-compliant. This makes the 71342LA20JG suitable for applications subject to environmental and regulatory standards.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 52-PLCC (19.13x19.13) package with identical pinouts, enabling direct socket substitution without PCB modification.

Q: What is the inventory status of these parts?

A: The 71342LA55J has 683 units in stock (obsolete status). The 71342LA20JG has 771 units available (Last Time Buy status). The 7134LA70J has 905 units in stock (obsolete status).