Equivalent & Substitute Parts for 7164S45DB

Part Overview

The 7164S45DB is a 64Kbit asynchronous SRAM memory IC manufactured by Renesas Electronics Corporation, packaged in a 28-CDIP configuration with 45 ns access time. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and component procurement.

Key Parameters

Parameter	Value
Memory Type	Volatile SRAM
Memory Size	64Kbit
Memory Organization	8K x 8
Memory Interface	Parallel
Access Time	45 ns
Write Cycle Time	45 ns
Supply Voltage	4.5V ~ 5.5V
Operating Temperature Range	-55°C ~ 125°C
Package Type	28-CDIP (0.600", 15.24mm)
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution eligibility for the 7164S45DB is determined by strict equivalence across the following critical parameters:

Memory capacity: 64Kbit
Memory organization: 8K x 8 parallel interface
Access and write cycle timing: 45 ns
Supply voltage range: 4.5V ~ 5.5V
Operating temperature range: -55°C ~ 125°C
Physical package: 28-CDIP through-hole configuration

The 7164L45DB meets all substitution criteria as a direct functional equivalent, with identical electrical specifications and package configuration. The primary distinction is product status: the 7164L45DB is active, whereas the 7164S45DB is obsolete.

Parameter Comparison

Parameter	7164S45DB	7164L45DB
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Type	Volatile SRAM	Volatile SRAM
Memory Size	64Kbit	64Kbit
Memory Organization	8K x 8	8K x 8
Memory Interface	Parallel	Parallel
Access Time	45 ns	45 ns
Write Cycle Time	45 ns	45 ns
Supply Voltage	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Package / Case	28-CDIP (0.600", 15.24mm)	28-CDIP (0.600", 15.24mm)
Mounting Type	Through Hole	Through Hole
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS non-compliant
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The 7164L45DB is the direct substitute for the 7164S45DB. Both components share identical electrical and mechanical specifications. Selection of the 7164L45DB is appropriate for new designs and component replacement applications, as it maintains active product status with Renesas Electronics Corporation, ensuring continued availability and supply chain stability.

Both parts carry identical RoHS non-compliance and REACH unaffected designations. Compliance requirements should be evaluated at the system level if regulatory adherence is a design constraint.

Frequently Asked Questions (FAQ)

Q: Can the 7164L45DB be used as a direct replacement for the 7164S45DB?

A: Yes. The 7164L45DB is electrically and mechanically equivalent to the 7164S45DB across all specified parameters, including memory capacity, access time, voltage range, temperature range, and 28-CDIP package configuration.

Q: What is the difference between the 7164S45DB and 7164L45DB?

A: The primary difference is product status. The 7164S45DB is obsolete, while the 7164L45DB is active. All electrical and physical specifications are identical.

Q: Are there any packaging differences between these parts?

A: Both components use the same 28-CDIP through-hole package with 0.600" (15.24mm) body width. No package modifications are required for substitution.

Q: Do both parts have the same compliance certifications?

A: Yes. Both the 7164S45DB and 7164L45DB are RoHS non-compliant and REACH unaffected. Compliance status is identical between the two parts.

Q: What is the inventory status of the substitute part?

A: The 7164L45DB has 827 pieces in stock as new original inventory, providing immediate availability for procurement.

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