Equivalent & Substitute Parts for Renesas 7134LA55CB

Part Overview

The Renesas 7134LA55CB is a 32Kbit dual-port asynchronous SRAM with parallel interface, organized as 4K x 8 bits. This component is classified as obsolete, making equivalent or substitute parts necessary for ongoing system support and new designs. The part operates across an extended temperature range of -55°C to 125°C and requires a 4.5V to 5.5V supply voltage. Its through-hole 48-DIP package (0.600", 15.24mm) with side-brazed construction provides mechanical compatibility with legacy circuit board designs.

Key Parameters

Parameter	Value
Memory Type	Volatile SRAM
Memory Format	Dual Port, Asynchronous
Memory Size	32Kbit
Memory Organization	4K x 8
Memory Interface	Parallel
Access Time	55 ns
Write Cycle Time	55 ns
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	-55°C ~ 125°C
Package Type	48-DIP (0.600", 15.24mm)
Mounting Type	Through Hole
Supplier Device Package	48-SIDE BRAZED

Substitute Part Grouping Explanation

Substitution for the 7134LA55CB is determined by strict equivalence across the following critical parameters:

Memory capacity and organization (32Kbit, 4K x 8 configuration)
Dual-port asynchronous SRAM technology
Parallel interface architecture
Supply voltage range (4.5V ~ 5.5V)
Operating temperature range (-55°C ~ 125°C)
Physical package (48-DIP, 0.600" width, side-brazed construction)
Through-hole mounting compatibility

The 7134LA35CB qualifies as a direct substitute based on identical memory specifications, voltage requirements, temperature range, and package form factor. The primary difference is improved access time performance (35 ns versus 55 ns), which represents a performance enhancement rather than a compatibility constraint.

Parameter Comparison

Parameter	7134LA55CB (Main Part)	7134LA35CB (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Type	Volatile SRAM	Volatile SRAM
Memory Format	Dual Port, Asynchronous	Dual Port, Asynchronous
Memory Size	32Kbit	32Kbit
Memory Organization	4K x 8	4K x 8
Memory Interface	Parallel	Parallel
Access Time	55 ns	35 ns
Write Cycle Time	55 ns	35 ns
Voltage Supply Range	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Package Type	48-DIP (0.600", 15.24mm)	48-DIP (0.600", 15.24mm)
Mounting Type	Through Hole	Through Hole
Supplier Device Package	48-SIDE BRAZED	48-SIDE BRAZED
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS non-compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The 7134LA35CB is the manufacturer-recommended substitute for the obsolete 7134LA55CB. Both parts maintain identical electrical and mechanical specifications across memory capacity, interface type, voltage requirements, and temperature operating range. The substitute part carries active product status, ensuring continued availability and supply chain reliability.

Both parts share equivalent RoHS non-compliance status and REACH unaffected classification. The 7134LA35CB offers superior access and write cycle time performance (35 ns versus 55 ns), which provides timing margin improvement in legacy system designs without requiring circuit modifications.

Frequently Asked Questions (FAQ)

Q: Can the 7134LA35CB replace the 7134LA55CB in existing designs?

A: Yes. The 7134LA35CB is electrically and mechanically compatible. Both parts operate at identical voltage levels (4.5V ~ 5.5V), support the same temperature range (-55°C ~ 125°C), and use the 48-DIP through-hole package. The faster access time of the substitute part does not create compatibility issues.

Q: What is the primary difference between these two parts?

A: Access time and write cycle time. The 7134LA55CB operates at 55 ns, while the 7134LA35CB operates at 35 ns. This represents improved performance in the substitute part.

Q: Are there package or pinout differences?

A: No. Both parts use the 48-DIP (0.600", 15.24mm) side-brazed package with through-hole mounting. Pinout and mechanical dimensions are identical.

Q: Why is the 7134LA55CB listed as obsolete?

A: The 7134LA55CB has reached end-of-life status. The 7134LA35CB remains in active production and is the recommended alternative for new designs and system support.

Q: Do compliance certifications differ between these parts?

A: No. Both parts share identical RoHS non-compliance status, REACH unaffected classification, and Moisture Sensitivity Level 1 (Unlimited) rating.

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