Equivalent & Substitute Parts for Renesas 7143LA55G

Part Overview

The Renesas 7143LA55G is a 32Kbit dual-port asynchronous SRAM with parallel interface, housed in a 68-PGA package. This component is classified as obsolete, making equivalent substitutes necessary for ongoing system support and new designs. The part operates within a 4.5V to 5.5V supply range with a 55 ns access time and is designed for through-hole mounting applications requiring volatile memory storage.

Substiute Parts

7143LA55G

Renesas Electronics CorporationIn Stock: 7187143LA55G Datasheet

Current PartRFQ

7133SA90GB

Renesas Electronics CorporationIn Stock: 8647133SA90GB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 7143LA55G is determined by the following critical parameters:

• Memory capacity (32Kbit) and organization (2K x 16) must remain identical
• Dual-port asynchronous SRAM technology is required
• Parallel interface configuration must be maintained
• Package type (68-BPGA) and physical dimensions (29.46x29.46) must match for PCB compatibility
• Supply voltage range (4.5V ~ 5.5V) must be compatible
• Access time and write cycle time may vary within acceptable system margins

The Renesas 7133SA90GB meets these substitution criteria while offering an active product status and extended operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The 7133SA90GB is the manufacturer-recommended substitute for the obsolete 7143LA55G. Both components share identical memory capacity, organization, interface type, and package configuration. The substitute maintains full voltage compatibility and identical MSL ratings.

The primary difference is access time: the 7133SA90GB operates at 90 ns compared to the 7143LA55G at 55 ns. This represents a 35 ns increase in memory access latency. System designs must accommodate this timing difference through timing analysis of the memory interface.

The 7133SA90GB offers extended operating temperature range (-55°C to 125°C versus 0°C to 70°C), providing broader environmental capability. The substitute's active product status ensures ongoing availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the 7133SA90GB directly replace the 7143LA55G in existing designs?

A: Direct PCB replacement is possible due to identical package type and pinout. However, timing analysis is required to confirm system compatibility with the 90 ns access time specification.

Q: What is the impact of the 35 ns access time difference?

A: The substitute has slower memory access. Systems with tight timing margins on memory read/write operations must be evaluated to ensure the 90 ns specification does not violate system timing requirements.

Q: Are the supply voltage requirements identical?

A: Yes. Both parts operate within the 4.5V to 5.5V range with identical electrical characteristics for power supply design.

Q: Does the substitute offer any advantages?

A: The 7133SA90GB provides extended operating temperature range (-55°C to 125°C) and active product status, ensuring long-term availability and support compared to the obsolete 7143LA55G.

Q: Are there any compliance differences?

A: Both parts carry identical RoHS non-compliance and MSL ratings. No compliance advantage exists between the two components.

Q: Is the 68-PGA package identical between both parts?

A: Yes. Both components use the same 68-BPGA package with 29.46x29.46 mm dimensions, ensuring mechanical and electrical compatibility on the PCB.