Renesas Electronics 7134SA70P SRAM Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7134SA70P is a 32Kbit dual-port asynchronous SRAM memory IC in 48-DIP packaging with 70 ns access time. This component is classified as obsolete, making substitute parts necessary for new designs, production continuity, and system upgrades. The part operates within the 4.5V to 5.5V supply voltage range and supports parallel memory interface architecture with 4K x 8 memory organization.

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	70 ns
Write Cycle Time	70 ns
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	48-DIP (0.600", 15.24mm)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the 7134SA70P is determined by the following critical parameters:

Memory Capacity & Organization: Substitute parts must maintain 32Kbit capacity with 4K x 8 organization to ensure address and data line compatibility
Memory Technology: Dual-port asynchronous SRAM architecture is required for functional equivalence
Parallel Interface: Memory interface must remain parallel to preserve system-level integration
Supply Voltage Compatibility: Operating voltage range must encompass or match the 4.5V ~ 5.5V specification
Package & Pinout: 48-DIP package with 0.600" (15.24mm) body dimension ensures mechanical and electrical compatibility with existing PCB layouts
Access Time: Substitute parts with equal or faster access time (≤70 ns) maintain or improve system performance

The Renesas Electronics 7134LA35CB qualifies as a direct substitute based on these parameters.

Parameter Comparison

Parameter	7134SA70P (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	70 ns	35 ns
Write Cycle Time	70 ns	35 ns
Voltage Supply Range	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°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
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS non-compliant

Engineering Selection Recommendations

The 7134LA35CB is the qualified substitute for the 7134SA70P based on the following engineering criteria:

Functional Compatibility: Both parts share identical memory capacity (32Kbit), organization (4K x 8), technology (dual-port asynchronous SRAM), interface type (parallel), supply voltage range (4.5V ~ 5.5V), and package configuration (48-DIP through-hole). These parameters ensure direct functional equivalence at the system level.

Performance Enhancement: The 7134LA35CB provides faster access and write cycle times (35 ns versus 70 ns), delivering improved system performance without requiring design modifications.

Product Status: The 7134LA35CB maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete 7134SA70P.

Compliance Considerations: Both parts carry identical RoHS non-compliance and REACH unaffected status. Compliance requirements must be evaluated within the context of the end-application regulatory framework.

Temperature Range Expansion: The 7134LA35CB supports an extended operating temperature range (-55°C ~ 125°C) compared to the 7134SA70P (0°C ~ 70°C), providing greater flexibility for applications requiring wider thermal operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the 7134LA35CB directly replace the 7134SA70P without PCB modifications?

A: Yes. Both parts use identical 48-DIP packaging with matching pinout and electrical interface specifications. No PCB layout changes are required for mechanical or electrical integration.

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

A: The 7134LA35CB offers faster memory access and write cycle times (35 ns) compared to the 7134SA70P (70 ns), while maintaining all other functional parameters. The substitute also features an extended operating temperature range and active product status.

Q: Are there any voltage compatibility concerns when substituting?

A: No. Both parts operate within the identical 4.5V ~ 5.5V supply voltage range, ensuring direct electrical compatibility with existing power distribution circuits.

Q: Does the faster access time of the 7134LA35CB create any system-level issues?

A: No. Faster memory access times are backward compatible with systems designed for slower components. The substitute will not introduce timing violations or functional conflicts.

Q: What packaging format is used for the 7134LA35CB?

A: The 7134LA35CB is supplied in 48-SIDE BRAZED packaging, which maintains the 48-DIP (0.600", 15.24mm) form factor and through-hole mounting compatibility with the original 7134SA70P.

Q: Is the 7134LA35CB suitable for applications requiring extended temperature operation?

A: Yes. The 7134LA35CB supports operating temperatures from -55°C to 125°C, compared to the 7134SA70P range of 0°C to 70°C, making it suitable for industrial and extended-temperature applications.

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

A: The 7134LA35CB is available with 930 pieces in new original stock, providing immediate availability for production and design implementation.

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