Equivalent & Substitute Parts for 7143SA35G

Part Overview

The 7143SA35G is a 32Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation, housed in a 68-PGA package with 35 ns access time. This part is classified as obsolete, making identification of compatible alternatives essential for ongoing system support and component procurement. The 7143SA35G operates within the 4.5V to 5.5V supply range and is designed for through-hole mounting applications requiring parallel memory interface architecture.

Substiute Parts

7143SA35G

Renesas Electronics CorporationIn Stock: 9857143SA35G Datasheet

Current PartRFQ

7133SA90GB

Renesas Electronics CorporationIn Stock: 8647133SA90GB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7143SA35G is determined by the following critical parameters:

• Memory capacity (32Kbit) and organization (2K x 16)
• Dual-port asynchronous SRAM architecture
• Parallel memory interface
• 68-BPGA package footprint (29.46x29.46)
• Through-hole mounting compatibility
• Supply voltage range (4.5V ~ 5.5V)

The 7133SA90GB qualifies as a functional substitute based on matching memory capacity, organization, interface type, package form factor, and voltage specifications. The primary difference lies in access time performance (90 ns versus 35 ns) and operating temperature range, which represent acceptable trade-offs for obsolete component replacement in non-timing-critical applications.

Parameter Comparison

Engineering Selection Recommendations

The 7133SA90GB is available as an active product from Renesas Electronics Corporation, addressing the obsolescence status of the 7143SA35G. Both parts maintain identical RoHS non-compliance classification and REACH unaffected status, ensuring consistent regulatory treatment in procurement workflows.

Selection of the 7133SA90GB requires evaluation of system timing constraints. The extended access time (90 ns versus 35 ns) and write cycle time necessitate confirmation that target applications do not impose strict timing requirements dependent on the original 35 ns specification. The expanded operating temperature range (-55°C to 125°C) of the substitute provides enhanced thermal performance compared to the original part's 0°C to 70°C specification.

Both parts share identical package geometry, supply voltage requirements, and memory organization, enabling direct footprint compatibility in through-hole PCB designs without layout modification.

Frequently Asked Questions (FAQ)

Q: Can the 7133SA90GB directly replace the 7143SA35G in existing designs?

A: Direct replacement is possible from a physical and electrical standpoint. The 68-BPGA package footprint, supply voltage range, memory capacity, and organization are identical. However, the 90 ns access time of the substitute is slower than the original 35 ns specification. Confirmation that system timing does not depend on the faster access time is required before implementation.

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

A: The main differences are access time (35 ns for 7143SA35G versus 90 ns for 7133SA90GB) and operating temperature range (0°C to 70°C versus -55°C to 125°C). Both parts are 32Kbit dual-port asynchronous SRAMs with identical memory organization and package specifications.

Q: Are there any compliance or regulatory differences?

A: Both parts carry identical RoHS non-compliant and REACH unaffected designations. No regulatory advantage exists between the two parts from a compliance perspective.

Q: Why is the 7143SA35G obsolete?

A: The 7143SA35G is classified as obsolete by Renesas Electronics Corporation. The 7133SA90GB represents the active product line continuation for this memory category, though with different performance characteristics.

Q: Will the substitute work in my application?

A: Compatibility depends on system timing requirements. If your application's memory access timing is not constrained to 35 ns or faster, the 7133SA90GB will function correctly. If timing margins are critical, detailed analysis of system clock cycles and memory access windows is necessary.