Equivalent & Substitute Parts for 7133SA45G

Part Overview

The 7133SA45G is a 32Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation, packaged in a 68-pin PGA configuration with 45 ns access time. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The part operates within a 4.5V to 5.5V supply range and supports 2K x 16 memory organization with parallel interface architecture.

Key Parameters

Parameter	Value
Manufacturer Part Number	7133SA45G
Manufacturer	Renesas Electronics Corporation
Memory Type	Volatile SRAM
Memory Size	32Kbit
Memory Organization	2K x 16
Memory Interface	Parallel
Access Time	45 ns
Write Cycle Time	45 ns
Voltage Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	68-BPGA (29.46x29.46)
Mounting Type	Through Hole
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 7133SA45G is determined by the following critical parameters:

Memory capacity (32Kbit) and organization (2K x 16)
Dual-port asynchronous SRAM technology
Parallel interface architecture
Supply voltage compatibility (4.5V ~ 5.5V)
Access time and write cycle time specifications
Package footprint and mounting compatibility

Two substitute parts are identified based on these criteria:

7133LA20JG: Meets memory capacity, organization, interface, and voltage requirements. Offers improved 20 ns access time. Differs in package type (68-PLCC surface mount vs. 68-BPGA through hole) and product status (active).

7133SA90GB: Maintains identical package type (68-BPGA through hole) and memory specifications. Operates with extended 90 ns access time and expanded temperature range (-55°C ~ 125°C vs. 0°C ~ 70°C).

Parameter Comparison

Parameter	7133SA45G (Main)	7133LA20JG (Substitute)	7133SA90GB (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Size	32Kbit	32Kbit	32Kbit
Memory Organization	2K x 16	2K x 16	2K x 16
Memory Format	SRAM - Dual Port, Asynchronous	SRAM - Dual Port, Asynchronous	SRAM - Dual Port, Asynchronous
Memory Interface	Parallel	Parallel	Parallel
Access Time	45 ns	20 ns	90 ns
Write Cycle Time	45 ns	20 ns	90 ns
Voltage Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-55°C ~ 125°C
Package Type	68-BPGA (29.46x29.46)	68-PLCC (24.21x24.21)	68-BPGA (29.46x29.46)
Mounting Type	Through Hole	Surface Mount	Through Hole
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS non-compliant

Engineering Selection Recommendations

7133LA20JG is suitable for applications requiring improved performance (20 ns access time) and RoHS3 compliance. This substitute requires PCB redesign due to package type change from through-hole to surface mount. The smaller footprint (24.21x24.21 vs. 29.46x29.46) necessitates layout modifications. Product status is active, ensuring long-term availability.

7133SA90GB maintains the original through-hole 68-BPGA package, minimizing PCB redesign requirements. This substitute accommodates extended operating temperature range (-55°C ~ 125°C) for applications requiring wider thermal specifications. Access time is doubled (90 ns), which may impact system timing in performance-critical applications. Product status is active with established supply chain support.

Selection between substitutes depends on design constraints: prioritize 7133LA20JG for new designs with RoHS compliance requirements and tolerance for package migration; prioritize 7133SA90GB for legacy system support with minimal PCB modifications and extended temperature operation.

Frequently Asked Questions (FAQ)

Q: Can 7133LA20JG directly replace 7133SA45G without PCB modifications?

A: No. The 7133LA20JG uses a 68-PLCC surface-mount package (24.21x24.21) compared to the 7133SA45G's 68-BPGA through-hole package (29.46x29.46). PCB redesign is required for footprint compatibility.

Q: What is the performance difference between 7133SA45G and 7133SA90GB?

A: Access time and write cycle time differ: 7133SA45G operates at 45 ns while 7133SA90GB operates at 90 ns. Both maintain identical memory capacity, organization, and supply voltage specifications. The 7133SA90GB supports extended temperature range (-55°C ~ 125°C vs. 0°C ~ 70°C).

Q: Is 7133LA20JG RoHS compliant?

A: Yes. 7133LA20JG is ROHS3 compliant, whereas both 7133SA45G and 7133SA90GB are RoHS non-compliant. This distinction is relevant for applications subject to RoHS regulatory requirements.

Q: Can 7133SA90GB be used in timing-critical applications?

A: The 7133SA90GB's 90 ns access time is twice that of the 7133SA45G (45 ns). System timing analysis is required to determine compatibility with existing timing constraints and clock frequencies.

Q: Which substitute offers the best long-term availability?

A: Both 7133LA20JG and 7133SA90GB are active products from Renesas Electronics Corporation. The 7133SA45G is obsolete. Active product status for both substitutes indicates established manufacturing and supply chain support.

Q: Are all three parts pin-compatible?

A: All three parts use 68-pin configurations with identical memory organization (2K x 16) and parallel interface. However, physical package differences (BPGA vs. PLCC) prevent direct socket compatibility without PCB modifications.

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