Equivalent & Substitute Parts for Renesas 7164L100DB

Part Overview

The Renesas 7164L100DB is a 64Kbit asynchronous SRAM memory IC in 28-CDIP packaging with 100 ns access time and parallel interface. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production support. The part operates across an extended temperature range of -55°C to 125°C with supply voltage tolerance of 4.5V to 5.5V.

Key Parameters

Parameter	Value
Memory Type	Volatile SRAM
Memory Size	64Kbit
Memory Organization	8K x 8
Memory Interface	Parallel
Access Time	100 ns
Write Cycle Time	100 ns
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	-55°C ~ 125°C
Package Type	28-CDIP (0.600", 15.24mm)
Mounting Type	Through Hole
RoHS Status	Non-compliant

Substitute Part Grouping Explanation

Substitution for the 7164L100DB is determined by strict equivalence in the following parameters:

Memory capacity: 64Kbit
Memory organization: 8K x 8 parallel format
Package type: 28-CDIP through-hole configuration
Supply voltage range: 4.5V ~ 5.5V
Operating temperature range: -55°C ~ 125°C
Interface type: Parallel

The substitute part 7164L45DB maintains full compatibility across all mechanical and electrical parameters. The primary difference is improved access time performance (45 ns versus 100 ns), which represents a performance enhancement rather than a functional limitation.

Parameter Comparison

Parameter	7164L100DB (Main Part)	7164L45DB (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Size	64Kbit	64Kbit
Memory Organization	8K x 8	8K x 8
Memory Interface	Parallel	Parallel
Access Time	100 ns	45 ns
Write Cycle Time	100 ns	45 ns
Voltage Supply	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	Non-compliant	Non-compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The 7164L45DB is the direct substitute for the 7164L100DB. Both parts share identical memory capacity, organization, packaging, and electrical specifications. The 7164L45DB is recommended for new designs and production continuity due to its active product status, whereas the 7164L100DB is obsolete.

The faster access time of the 7164L45DB (45 ns) is a performance improvement that does not create compatibility issues in applications designed for the 100 ns part. Both components maintain the same RoHS non-compliance status and REACH unaffected classification.

Frequently Asked Questions (FAQ)

Q: Can the 7164L45DB directly replace the 7164L100DB in existing designs?

A: Yes. The 7164L45DB is a direct substitute with identical pinout, package dimensions, memory organization, and electrical specifications. The faster access time represents an enhancement.

Q: Are there any voltage or temperature compatibility concerns?

A: No. Both parts operate across the identical supply voltage range (4.5V ~ 5.5V) and temperature range (-55°C ~ 125°C).

Q: What is the difference between these two parts?

A: The primary difference is access time: the 7164L100DB has 100 ns access time, while the 7164L45DB has 45 ns access time. Both are 64Kbit SRAM devices in 28-CDIP packaging.

Q: Why is the 7164L100DB listed as obsolete?

A: The 7164L100DB has reached end-of-life status. The 7164L45DB remains in active production and is the recommended alternative.

Q: Are there any packaging or mounting differences?

A: No. Both parts use identical 28-CDIP through-hole packaging with 0.600" (15.24mm) dimensions.

Q: Do both parts have the same compliance certifications?

A: Both parts share the same RoHS non-compliance status, REACH unaffected classification, and Moisture Sensitivity Level 1 rating.

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