Renesas Electronics 7007S35G SRAM 256Kbit Parallel Memory - Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7007S35G is a dual-port asynchronous SRAM memory IC with 256Kbit capacity organized as 32K x 8, designed for parallel interface applications. This component operates at 35 ns access time and write cycle time, with supply voltage range of 4.5V to 5.5V and operating temperature range of 0°C to 70°C. The part is packaged in a 68-pin Ball Grid Array (68-BPGA) with through-hole mounting. The 7007S35G is classified as obsolete, making identification of functionally equivalent alternatives essential for system redesign, legacy equipment maintenance, and production continuity.

Substiute Parts

7007S35G

Renesas Electronics CorporationIn Stock: 11387007S35G Datasheet

Current PartRFQ

7007L15JG

Renesas Electronics CorporationIn Stock: 7887007L15JG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 7007S35G is determined by strict equivalence in core memory parameters: memory type (volatile SRAM), format (dual-port asynchronous), capacity (256Kbit), organization (32K x 8), and interface (parallel). The substitute part 7007L15JG maintains identical memory specifications and electrical characteristics, including the same supply voltage range (4.5V ~ 5.5V) and operating temperature range (0°C ~ 70°C).

The primary differences between the main part and substitute are:

• Access time and write cycle time: 35 ns (7007S35G) versus 15 ns (7007L15JG)
• Package type: 68-BPGA through-hole (7007S35G) versus 68-PLCC surface-mount (7007L15JG)
• Product status: Obsolete (7007S35G) versus Active (7007L15JG)
• RoHS compliance: Non-compliant (7007S35G) versus ROHS3 compliant (7007L15JG)

The 7007L15JG is functionally compatible as a substitute because it provides superior or equivalent performance in all critical memory parameters while maintaining electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 7007L15JG serves as a direct functional substitute for the obsolete 7007S35G based on identical memory capacity, organization, interface type, and electrical specifications. The substitute part offers performance advantages with 15 ns access and write cycle times compared to the original 35 ns specification, providing improved speed margin for timing-critical applications.

Selection of the 7007L15JG is supported by its active product status, ensuring continued availability and supply chain reliability. The part meets ROHS3 compliance requirements, addressing regulatory and environmental standards applicable to modern manufacturing and deployment environments.

Implementation of the 7007L15JG requires PCB redesign to accommodate the transition from through-hole 68-BPGA packaging to surface-mount 68-PLCC packaging. This packaging change necessitates modification of the circuit board layout, footprint design, and assembly process parameters.

Frequently Asked Questions (FAQ)

Q: Can the 7007L15JG directly replace the 7007S35G without circuit modifications?

A: The 7007L15JG is electrically compatible and functionally equivalent in memory specifications. However, the packaging transition from 68-BPGA through-hole to 68-PLCC surface-mount requires PCB redesign and assembly process changes. Pin-to-pin electrical compatibility exists, but physical mounting architecture differs.

Q: What are the key memory parameters that define substitution compatibility?

A: Substitution compatibility is determined by: memory type (volatile SRAM), format (dual-port asynchronous), capacity (256Kbit), organization (32K x 8), interface type (parallel), supply voltage range (4.5V ~ 5.5V), and operating temperature range (0°C ~ 70°C). The 7007L15JG maintains all these parameters identically to the 7007S35G.

Q: Does the faster access time of the 7007L15JG (15 ns vs. 35 ns) affect system compatibility?

A: The faster access time of the 7007L15JG represents improved performance and does not create compatibility issues. Systems designed for 35 ns access time operate correctly with 15 ns memory, as the substitute provides superior speed characteristics within the same electrical and functional specifications.

Q: What are the implications of the packaging change from 68-BPGA to 68-PLCC?

A: The packaging change requires PCB layout redesign, including footprint modification, trace routing adjustments, and assembly process parameter updates. The 68-PLCC surface-mount package has different physical dimensions (24.21x24.21 mm) compared to the 68-BPGA through-hole package (29.46x29.46 mm), necessitating mechanical and manufacturing process changes.

Q: Is the 7007L15JG suitable for applications requiring RoHS compliance?

A: Yes. The 7007L15JG is ROHS3 compliant, meeting regulatory requirements for restricted hazardous substances. The original 7007S35G is non-compliant, making the substitute appropriate for applications subject to RoHS standards and environmental regulations.

Q: Are there inventory considerations when selecting the 7007L15JG as a substitute?

A: The 7007L15JG is an active product with 728 units in stock, ensuring supply availability. The 7007S35G is obsolete with limited remaining inventory (1097 units), making the active substitute the preferred long-term sourcing option for production continuity and future system support.