Equivalent & Substitute Parts for 7142LA100J

Part Overview

The 7142LA100J is a 16Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation in a 52-PLCC package. This memory IC operates with a 100 ns access time and write cycle time, designed for parallel memory applications requiring volatile storage. The part is classified as obsolete, making identification of compatible alternatives essential for system maintenance, repair, and legacy equipment support.

Substiute Parts

7142LA100J

Renesas Electronics CorporationIn Stock: 10137142LA100J Datasheet

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7142LA20JG

Renesas Electronics CorporationIn Stock: 9887142LA20JG Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 7142LA100J is determined by strict equivalence in the following parameters:

• Memory capacity and organization (16Kbit, 2K x 8 configuration)
• Dual-port asynchronous SRAM technology
• Parallel memory interface
• Package type and pinout (52-PLCC with J-Lead)
• Supply voltage range (4.5V ~ 5.5V)
• Operating temperature range (0°C ~ 70°C)

The 7142LA20JG qualifies as a direct substitute based on identical memory specifications, package configuration, and electrical operating parameters. The primary difference is improved access time and write cycle time performance (20 ns versus 100 ns), which represents a performance upgrade rather than a functional incompatibility.

Parameter Comparison

Engineering Selection Recommendations

The 7142LA20JG is a direct functional substitute for the 7142LA100J. Both parts share identical memory capacity, organization, interface type, and package configuration. The 7142LA20JG offers superior performance characteristics with 20 ns access and write cycle times compared to the 100 ns specification of the original part.

Selection of the 7142LA20JG is supported by its active product status, ensuring continued availability and supply chain reliability. The part meets ROHS3 compliance requirements, whereas the 7142LA100J is non-compliant. Both parts maintain REACH unaffected status and identical ECCN and HTSUS classifications.

Frequently Asked Questions (FAQ)

Q: Can the 7142LA20JG directly replace the 7142LA100J in existing designs?

A: Yes. Both parts are identical in memory capacity (16Kbit), organization (2K x 8), package type (52-PLCC), and electrical specifications (4.5V ~ 5.5V supply, 0°C ~ 70°C operating range). The 7142LA20JG operates at faster access times, which is functionally compatible with systems designed for the 100 ns part.

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

A: The 7142LA20JG provides improved performance with 20 ns access and write cycle times versus the 100 ns specification of the 7142LA100J. Both parts are Renesas dual-port asynchronous SRAM devices in identical 52-PLCC packages.

Q: Are there any compliance differences between the parts?

A: The 7142LA20JG is ROHS3 compliant, while the 7142LA100J is RoHS non-compliant. Both parts are REACH unaffected and share identical ECCN and HTSUS classifications.

Q: Does the 52-PLCC package pinout remain the same between these parts?

A: Yes. Both the 7142LA100J and 7142LA20JG use the 52-PLCC (J-Lead) package with identical pinout and mechanical dimensions (19.13x19.13 mm), ensuring direct board-level compatibility.

Q: Why is the 7142LA100J classified as obsolete?

A: The 7142LA100J has reached end-of-life status. The 7142LA20JG remains in active production and is the recommended alternative for new designs and legacy system replacements.