Renesas 7164L35DB SRAM 64Kbit Parallel Memory - Equivalent & Substitute Parts

Part Overview

The Renesas 7164L35DB is a 64Kbit asynchronous SRAM with parallel interface in 28-CDIP packaging. This volatile memory device operates at 35 ns access time and supports supply voltages from 4.5V to 5.5V across an extended temperature range of -55°C to 125°C. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations.

Substiute Parts

7164L35DB

Renesas Electronics CorporationIn Stock: 9027164L35DB Datasheet

Current PartRFQ

7164L45DB

Renesas Electronics CorporationIn Stock: 8857164L45DB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 7164L35DB is determined by strict equivalence in the following parameters:

• Memory capacity: 64Kbit
• Memory organization: 8K x 8 parallel format
• Package type: 28-CDIP form factor
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: -55°C ~ 125°C
• Mounting technology: Through Hole

The primary differentiator between the main part and its substitute is access time and write cycle time. The 7164L45DB operates at 45 ns instead of 35 ns, representing a slower speed grade of the same base device. This substitution is valid only in applications where the 45 ns timing specification meets system requirements.

Parameter Comparison

Engineering Selection Recommendations

The 7164L45DB serves as the active production substitute for the obsolete 7164L35DB. Both devices share identical electrical specifications except for access and write cycle timing. The 7164L45DB is currently in active production status, ensuring availability for new designs and legacy system support.

Selection between these parts depends on system timing requirements. The 7164L35DB operates at 35 ns, while the 7164L45DB operates at 10 ns slower at 45 ns. Both devices maintain identical supply voltage ranges, temperature operating windows, and physical packaging specifications. The compliance profiles are equivalent, with both parts carrying RoHS non-compliant and REACH Unaffected designations.

Frequently Asked Questions (FAQ)

Q: Can the 7164L45DB replace the 7164L35DB in all applications?

A: The 7164L45DB is electrically and mechanically compatible with the 7164L35DB. Substitution is valid only when system timing specifications accommodate the 45 ns access time. Applications requiring 35 ns or faster access times cannot use the 7164L45DB.

Q: Are the package dimensions identical between these parts?

A: Yes. Both the 7164L35DB and 7164L45DB use the 28-CDIP package with dimensions of 0.600" (15.24mm). Through-hole mounting is identical for both devices.

Q: What is the difference in supply voltage requirements?

A: Both parts operate within the identical supply voltage range of 4.5V to 5.5V. No voltage adjustment is required when substituting between these devices.

Q: Are there temperature range differences?

A: No. Both the 7164L35DB and 7164L45DB operate across the same extended temperature range of -55°C to 125°C.

Q: Why is the 7164L35DB listed as obsolete?

A: The 7164L35DB has been discontinued by Renesas Electronics Corporation. The 7164L45DB remains in active production and is the recommended source for new inventory.

Q: Do these parts have different RoHS compliance status?

A: No. Both the 7164L35DB and 7164L45DB carry identical RoHS non-compliant designations and REACH Unaffected status.