Renesas Electronics 7133LA90J SRAM Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7133LA90J is a 32Kbit dual-port asynchronous SRAM memory IC in 68-PLCC surface mount packaging. This part is classified as obsolete, making substitute components necessary for new designs, repairs, or production continuity. The 90 ns access time and parallel interface architecture define its functional role in legacy memory applications. Identifying compatible alternatives requires matching memory capacity, organization, interface type, and electrical specifications while considering modern compliance standards.

Key Parameters

Parameter	Value
Memory Type	Volatile SRAM
Memory Format	Dual Port, Asynchronous
Memory Size	32Kbit
Memory Organization	2K x 16
Memory Interface	Parallel
Access Time	90 ns
Write Cycle Time	90 ns
Voltage Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	68-PLCC (J-Lead)
Mounting Type	Surface Mount
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the 7133LA90J is determined by strict equivalence across the following parameters:

Memory capacity and organization (32Kbit, 2K x 16 configuration)
Dual-port asynchronous SRAM architecture
Parallel interface connectivity
Supply voltage range (4.5V ~ 5.5V)
Operating temperature range (0°C ~ 70°C)
68-PLCC package footprint and pinout compatibility
MSL rating (3, 168 Hours)

The 7133LA20JG qualifies as a direct substitute based on identical memory specifications, package, and electrical parameters. The primary distinction is improved access time (20 ns versus 90 ns), which represents a performance upgrade rather than a functional incompatibility. Both parts share the same base product number (7133LA) and are manufactured by Renesas Electronics Corporation.

Parameter Comparison

Parameter	7133LA90J (Main Part)	7133LA20JG (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	2K x 16	2K x 16
Memory Interface	Parallel	Parallel
Access Time	90 ns	20 ns
Write Cycle Time	90 ns	20 ns
Voltage Supply	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C
Package Type	68-PLCC (J-Lead)	68-PLCC (J-Lead)
Mounting Type	Surface Mount	Surface Mount
MSL Rating	3 (168 Hours)	3 (168 Hours)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The 7133LA20JG is the qualified substitute for the 7133LA90J based on the following engineering criteria:

Functional Compatibility: Both parts are identical in memory capacity, organization, interface type, and electrical specifications. The 68-PLCC package footprint and pinout are equivalent, enabling direct board-level replacement without layout modifications.

Product Status: The 7133LA90J is obsolete, while the 7133LA20JG maintains active production status. This ensures long-term availability and supply chain continuity for new designs or production runs.

Compliance Advantage: The 7133LA20JG achieves ROHS3 compliance, whereas the 7133LA90J is non-compliant. For applications subject to RoHS regulations, the substitute part satisfies regulatory requirements.

Performance Improvement: The 7133LA20JG provides faster access and write cycle times (20 ns versus 90 ns). This represents a performance upgrade that maintains backward compatibility with systems designed for the slower 90 ns part.

Frequently Asked Questions (FAQ)

Q: Can the 7133LA20JG replace the 7133LA90J in existing designs?

A: Yes. The 7133LA20JG is functionally equivalent across all critical parameters: memory capacity (32Kbit), organization (2K x 16), interface type (parallel), supply voltage (4.5V ~ 5.5V), operating temperature range (0°C ~ 70°C), and package footprint (68-PLCC). The faster access time is a performance enhancement that does not create incompatibility.

Q: Are the package dimensions and pinouts identical?

A: Yes. Both parts use the 68-PLCC (J-Lead) package with identical dimensions (24.21x24.21 mm) and pinout configuration. Direct board-level substitution is possible without PCB redesign.

Q: What is the primary reason to substitute the 7133LA90J?

A: The 7133LA90J is classified as obsolete. The 7133LA20JG is the active production equivalent, ensuring component availability for new designs, repairs, and ongoing production requirements.

Q: Does the faster access time of the 7133LA20JG create any compatibility issues?

A: No. Faster access time (20 ns versus 90 ns) is a performance improvement. Systems designed for 90 ns operation will function correctly with the faster part. No timing violations or functional degradation will occur.

Q: What is the RoHS compliance difference?

A: The 7133LA90J is RoHS non-compliant. The 7133LA20JG is ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the 7133LA20JG satisfies compliance mandates.

Q: Are the moisture sensitivity levels the same?

A: Yes. Both parts carry an MSL rating of 3 (168 Hours), requiring identical handling and storage protocols during manufacturing and assembly.

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