Equivalent & Substitute Parts for Renesas 7142SA35C

Part Overview

The Renesas 7142SA35C is a 16Kbit dual-port asynchronous SRAM with parallel interface, organized as 2K x 8, featuring 35 ns access time and 48-DIP through-hole packaging. This part is classified as obsolete, making substitute identification necessary for ongoing system support and component procurement. The 7142SA35C operates within a 4.5V to 5.5V supply range and is rated for 0°C to 70°C operating temperature.

Substiute Parts

7142SA35C

Renesas Electronics CorporationIn Stock: 7547142SA35C Datasheet

Current PartRFQ

7132LA100CB

Renesas Electronics CorporationIn Stock: 9857132LA100CB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7142SA35C is determined by the following critical parameters:

• Memory capacity and organization (16Kbit, 2K x 8)
• Dual-port asynchronous SRAM technology
• Parallel interface configuration
• 48-DIP through-hole package compatibility
• Supply voltage range (4.5V ~ 5.5V)
• Access time performance requirements

The Renesas 7132LA100CB qualifies as a functional substitute based on matching memory capacity, organization, technology, interface type, package form factor, and supply voltage specifications. The primary difference is access time performance: the 7132LA100CB operates at 100 ns versus the 7142SA35C at 35 ns. This represents a performance trade-off acceptable in applications where timing margins permit slower memory access cycles.

Parameter Comparison

Engineering Selection Recommendations

The 7132LA100CB is the qualified substitute for the obsolete 7142SA35C. Selection of this substitute is supported by:

• Active product status, ensuring ongoing availability and supply chain continuity
• Identical memory capacity, organization, and interface specifications
• Matching package form factor and through-hole mounting compatibility
• Identical supply voltage range
• Extended operating temperature range (-55°C to 125°C) providing broader environmental coverage compared to the original part

The primary design consideration is access time: the 7132LA100CB operates at 100 ns versus 35 ns for the original part. System timing analysis must confirm that the slower access time does not violate critical path requirements or introduce timing violations in the target application.

Frequently Asked Questions (FAQ)

Q: Can the 7132LA100CB directly replace the 7142SA35C in existing designs?

A: Electrical and mechanical compatibility is confirmed. Pin-for-pin compatibility and package form factor are identical. However, the 100 ns access time of the 7132LA100CB is slower than the 35 ns specification of the original part. Verification that system timing margins accommodate this performance difference is required before implementation.

Q: Are there differences in supply voltage requirements?

A: Both parts operate within the identical 4.5V to 5.5V supply range. No power supply modifications are necessary.

Q: What is the significance of the extended operating temperature range in the 7132LA100CB?

A: The 7132LA100CB supports -55°C to 125°C operation, compared to 0°C to 70°C for the 7142SA35C. This extended range provides design flexibility for applications requiring broader environmental specifications, though it does not affect substitution eligibility for standard temperature-range applications.

Q: Are both parts RoHS compliant?

A: Both the 7142SA35C and 7132LA100CB are RoHS non-compliant. No compliance advantage is gained through substitution.

Q: What packaging format is used for the 7132LA100CB?

A: The 7132LA100CB is supplied in tube packaging, whereas specific packaging information for the original part was not provided. Both parts use identical 48-DIP (0.600", 15.24mm) through-hole package form factors suitable for standard PCB assembly processes.