Equivalent & Substitute Parts for 7133LA55J8

Part Overview

The 7133LA55J8 is a 32Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation in a 68-PLCC package. This part is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs. The 55 ns access time and parallel interface make this component suitable for legacy embedded systems requiring volatile memory with dual-port architecture.

Substiute Parts

7133LA55J8

Renesas Electronics CorporationIn Stock: 10957133LA55J8 Datasheet

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7133LA20JG8

Renesas Electronics CorporationIn Stock: 8257133LA20JG8 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 7133LA55J8 is determined by the following critical parameters that must remain constant:

• Memory capacity: 32Kbit
• Memory organization: 2K x 16
• Dual-port asynchronous architecture
• Parallel interface
• Package type: 68-PLCC (24.21x24.21)
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: 0°C ~ 70°C
• Surface mount configuration

The 7133LA20JG8 qualifies as a direct substitute because it maintains all critical electrical and mechanical parameters while offering improved performance characteristics (20 ns access time versus 55 ns). Both parts share the same base product number (7133LA), memory capacity, organization, interface type, and package specification.

Parameter Comparison

Engineering Selection Recommendations

The 7133LA20JG8 is the qualified substitute for the 7133LA55J8. Selection of this alternative is supported by the following factors:

• Active product status ensures long-term availability and supply chain continuity
• ROHS3 compliance meets current environmental and regulatory requirements, whereas the main part is non-compliant
• Improved access time (20 ns) and write cycle time (20 ns) provide performance enhancement without requiring circuit redesign
• Identical electrical specifications (voltage, temperature range) and mechanical compatibility (package, pinout) ensure direct replacement capability
• Both parts maintain the same memory capacity, organization, and dual-port asynchronous architecture

Frequently Asked Questions (FAQ)

Q: Can the 7133LA20JG8 be used as a direct replacement for the 7133LA55J8?

A: Yes. Both parts share identical memory capacity (32Kbit), organization (2K x 16), dual-port asynchronous architecture, parallel interface, supply voltage range (4.5V ~ 5.5V), operating temperature range (0°C ~ 70°C), and 68-PLCC package specification. The 7133LA20JG8 offers faster access and write cycle times (20 ns versus 55 ns), which is a performance improvement compatible with existing circuit designs.

Q: Are there any package or pinout differences between these parts?

A: No. Both the 7133LA55J8 and 7133LA20JG8 use the 68-PLCC (24.21x24.21) package with identical J-lead configuration and surface mount mounting type. Pinout compatibility is maintained.

Q: What is the significance of the RoHS compliance difference?

A: The 7133LA55J8 is RoHS non-compliant, while the 7133LA20JG8 is ROHS3 compliant. For new designs and systems subject to environmental regulations, the 7133LA20JG8 is the appropriate selection. For legacy system maintenance where RoHS compliance is not a requirement, either part may be used based on availability.

Q: Does the faster access time of the 7133LA20JG8 require circuit modifications?

A: No. The 7133LA20JG8 is a performance-enhanced substitute. Faster access time does not require circuit changes; it is backward compatible with designs specified for the 7133LA55J8.

Q: What is the moisture sensitivity level for both parts?

A: Both parts have a Moisture Sensitivity Level (MSL) of 3, rated for 168 hours. Standard moisture control procedures during storage and handling apply to both components.