Equivalent & Substitute Parts for 7134LA55J8

Part Overview

The 7134LA55J8 is a 32Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation in a 52-PLCC package. This part is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs. The part operates with a 55 ns access time and write cycle time, making it suitable for applications requiring moderate-speed parallel memory access within the 4.5V to 5.5V supply range.

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	0°C ~ 70°C
Package Type	52-PLCC (J-Lead)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the 7134LA55J8 is determined by strict equivalence across the following critical parameters:

Memory capacity and organization (32Kbit, 4K x 8 configuration)
Dual-port asynchronous SRAM architecture
Parallel memory interface
Package type and pinout (52-PLCC with J-Lead)
Supply voltage compatibility (4.5V ~ 5.5V)
Operating temperature range (0°C ~ 70°C)

The 7134LA20JG8 qualifies as a direct substitute because it maintains identical memory capacity, organization, interface type, package configuration, voltage range, and temperature specifications. The primary difference is improved access time and write cycle time performance (20 ns versus 55 ns), which represents a performance upgrade rather than a functional incompatibility. Both parts share the same base product number (7134LA) and are manufactured by Renesas Electronics Corporation.

Parameter Comparison

Parameter	7134LA55J8 (Main Part)	7134LA20JG8 (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	20 ns
Write Cycle Time	55 ns	20 ns
Voltage Supply Range	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C
Package Type	52-PLCC (J-Lead)	52-PLCC (J-Lead)
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging Format	Bulk	Tape & Reel (TR)

Engineering Selection Recommendations

The 7134LA20JG8 is the appropriate substitute for the 7134LA55J8 based on the following engineering criteria:

Product Status: The 7134LA55J8 is classified as obsolete, while the 7134LA20JG8 maintains active product status with confirmed inventory availability. This ensures long-term supply chain viability and continued manufacturer support.

Regulatory Compliance: The 7134LA20JG8 is ROHS3 compliant, whereas the 7134LA55J8 is RoHS non-compliant. For applications subject to RoHS directives, the substitute part satisfies current regulatory requirements.

Performance Characteristics: The 7134LA20JG8 provides superior access time and write cycle time specifications (20 ns versus 55 ns). This performance improvement is backward-compatible with designs originally specified for the 7134LA55J8, as faster memory does not introduce timing violations in systems designed for slower components.

Functional Equivalence: Both parts maintain identical memory capacity, organization, interface architecture, package configuration, and electrical specifications, ensuring direct functional substitution without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can the 7134LA20JG8 be used as a direct replacement for the 7134LA55J8 in existing designs?

A: Yes. The 7134LA20JG8 is functionally equivalent across all critical parameters: memory capacity (32Kbit), organization (4K x 8), interface type (parallel dual-port asynchronous SRAM), package configuration (52-PLCC), voltage range (4.5V ~ 5.5V), and operating temperature (0°C ~ 70°C). No circuit modifications are required.

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

A: The primary difference is access time and write cycle time performance. The 7134LA20JG8 operates at 20 ns, while the 7134LA55J8 operates at 55 ns. The substitute part provides faster memory access, which is compatible with designs originally specified for the slower part.

Q: Are the packages physically identical?

A: Yes. Both parts use the 52-PLCC (J-Lead) package with identical pinout and physical dimensions (19.13x19.13 mm). They are mechanically interchangeable on the PCB.

Q: Why is the 7134LA55J8 classified as obsolete?

A: The 7134LA55J8 has reached end-of-life status with Renesas Electronics Corporation. The 7134LA20JG8 represents the active product line continuation with improved performance specifications and current regulatory compliance.

Q: Does the substitute part require different supply voltage or operating temperature specifications?

A: No. Both parts operate within identical voltage (4.5V ~ 5.5V) and temperature (0°C ~ 70°C) ranges. Power supply and thermal management designs require no modification.

Q: What is the difference in packaging format between these parts?

A: The 7134LA55J8 is supplied in bulk packaging, while the 7134LA20JG8 is supplied in Tape & Reel (TR) format. This difference affects handling and assembly processes but does not impact electrical or functional characteristics.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message