R1LP0408DSP-7SR#B0 Equivalent & Substitute Parts

Part Overview

The R1LP0408DSP-7SR#B0 is a 4Mbit parallel SRAM memory IC manufactured by Renesas Electronics Corporation in a 32-SOP package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs, maintenance, or production continuity. The part operates with a 70 ns access time and supports standard 4.5V to 5.5V supply voltage across a 0°C to 70°C operating temperature range.

Substiute Parts

R1LP0408DSP-7SR#B0

Renesas Electronics CorporationIn Stock: 1723R1LP0408DSP-7SR#B0 Datasheet

Current PartRFQ

IS62C5128BL-45QLI

ISSI, Integrated Silicon Solution IncIn Stock: 1175IS62C5128BL-45QLI Datasheet

SimilarRFQ

IS62C5128BL-45QLI-TR

ISSI, Integrated Silicon Solution IncIn Stock: 715IS62C5128BL-45QLI-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the R1LP0408DSP-7SR#B0 is determined by the following critical parameters:

• Memory capacity (4Mbit) and organization (512K x 8)
• Parallel interface architecture
• Supply voltage compatibility (4.5V ~ 5.5V)
• Package form factor (32-SOIC)
• Access time performance (70 ns or faster)

The identified substitute parts are ISSI IS62C5128BL series components, which maintain identical memory capacity, organization, interface type, and supply voltage specifications. These parts feature 45 ns access time, which exceeds the performance requirement of the original part. Both substitute variants (IS62C5128BL-45QLI and IS62C5128BL-45QLI-TR) are electrically and mechanically compatible within the specified parameters.

Parameter Comparison

Engineering Selection Recommendations

The IS62C5128BL-45QLI and IS62C5128BL-45QLI-TR are direct functional equivalents for the obsolete R1LP0408DSP-7SR#B0. Both substitute parts are in active production status, ensuring long-term availability and supply chain stability. All three parts maintain ROHS3 compliance and REACH unaffected status.

The substitute parts provide improved access time performance (45 ns versus 70 ns) and extended operating temperature range (-40°C to 85°C versus 0°C to 70°C), making them suitable for applications requiring broader environmental specifications. Package dimensions are nominally equivalent within standard PCB assembly tolerances.

The primary distinction between the two ISSI substitutes is the tape-and-reel packaging designation (-TR suffix) on the IS62C5128BL-45QLI-TR variant, which is standard for high-volume automated assembly operations.

Frequently Asked Questions (FAQ)

Q: Are the ISSI IS62C5128BL parts pin-compatible with the Renesas R1LP0408DSP-7SR#B0?

A: Yes. Both parts use the 32-SOIC package with identical pin assignments for parallel SRAM interface signals. Package dimensions are within standard PCB assembly tolerances (11.40mm versus 11.30mm width).

Q: Can the faster 45 ns access time of the substitute parts cause compatibility issues?

A: No. Faster access time is a performance enhancement that maintains backward compatibility. Systems designed for 70 ns operation will function correctly with 45 ns components.

Q: What is the difference between IS62C5128BL-45QLI and IS62C5128BL-45QLI-TR?

A: Both parts are electrically identical. The -TR suffix indicates tape-and-reel packaging format, standard for automated assembly. The non-TR variant may be supplied in alternative packaging formats.

Q: Are there supply voltage or temperature range considerations when substituting?

A: The substitute parts maintain the 4.5V to 5.5V supply voltage range. The extended operating temperature range (-40°C to 85°C) of the ISSI parts is compatible with applications originally specified for 0°C to 70°C operation.

Q: What is the MSL (Moisture Sensitivity Level) difference, and does it affect selection?

A: The original part has MSL 1 (unlimited shelf life), while substitutes have MSL 3 (168-hour limit after moisture exposure). MSL 3 requires standard moisture control during storage and assembly but is standard for modern surface-mount components.