Renesas Electronics 7133SA35PF SRAM Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7133SA35PF is a 32Kbit dual-port asynchronous SRAM memory IC in a 100-TQFP surface mount package. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs. The part operates within a 4.5V to 5.5V supply voltage range with a 35 ns access time and write cycle time, suitable for parallel memory interface applications requiring 2K x 16 memory organization.

Key Parameters

Parameter	Value
Memory Size	32Kbit
Memory Organization	2K x 16
Memory Type	Volatile SRAM
Technology	SRAM - Dual Port, Asynchronous
Memory Interface	Parallel
Access Time	35 ns
Write Cycle Time	35 ns
Voltage Supply Range	4.5V ~ 5.5V
Package Type	100-TQFP (14x14)
Mounting Type	Surface Mount
Operating Temperature	0°C ~ 70°C
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the 7133SA35PF is determined by the following critical parameters:

Memory capacity (32Kbit) and organization (2K x 16)
Dual-port asynchronous SRAM technology
Parallel memory interface configuration
100-TQFP surface mount package with identical footprint (14x14mm)
Supply voltage compatibility (4.5V ~ 5.5V range)
Access and write cycle time specifications

The Renesas Electronics 7133LA20PFG meets all substitution criteria. This part maintains identical memory capacity, organization, technology, interface type, and package specifications. The 7133LA20PFG provides improved performance characteristics with a 20 ns access time and write cycle time, representing a performance upgrade. The substitute part operates across an extended temperature range (-55°C ~ 125°C) and maintains active product status with RoHS3 compliance.

Parameter Comparison

Parameter	7133SA35PF (Main Part)	7133LA20PFG (Substitute)
Memory Size	32Kbit	32Kbit
Memory Organization	2K x 16	2K x 16
Memory Type	Volatile SRAM	Volatile SRAM
Technology	SRAM - Dual Port, Asynchronous	SRAM - Dual Port, Asynchronous
Memory Interface	Parallel	Parallel
Access Time	35 ns	20 ns
Write Cycle Time	35 ns	20 ns
Voltage Supply Range	4.5V ~ 5.5V	4.5V ~ 5.5V
Package Type	100-TQFP (14x14)	100-TQFP (14x14)
Mounting Type	Surface Mount	Surface Mount
Operating Temperature Range	0°C ~ 70°C	-55°C ~ 125°C
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

The 7133LA20PFG is the direct substitute for the obsolete 7133SA35PF. Selection of the 7133LA20PFG is supported by the following factors:

Identical memory capacity, organization, and dual-port asynchronous SRAM architecture
Identical 100-TQFP package footprint enabling direct PCB compatibility
Matching supply voltage range (4.5V ~ 5.5V) and parallel interface configuration
Active product status ensuring long-term availability and supply chain continuity
RoHS3 compliance meeting current environmental and regulatory requirements
Extended operating temperature range (-55°C ~ 125°C) providing broader application flexibility
Improved access and write cycle time performance (20 ns versus 35 ns)

The 7133LA20PFG is available in tray packaging and maintains identical moisture sensitivity specifications. No design modifications are required for substitution.

Frequently Asked Questions (FAQ)

Q: Can the 7133LA20PFG directly replace the 7133SA35PF without PCB modifications?

A: Yes. Both parts use the 100-TQFP (14x14mm) package with identical pinout and footprint. No PCB layout changes are necessary.

Q: What are the key differences between these parts?

A: The primary differences are access time (20 ns versus 35 ns), operating temperature range (-55°C ~ 125°C versus 0°C ~ 70°C), product status (active versus obsolete), and RoHS compliance (RoHS3 compliant versus non-compliant).

Q: Is the 7133LA20PFG a performance upgrade?

A: Yes. The 7133LA20PFG provides faster access and write cycle times (20 ns) compared to the 7133SA35PF (35 ns), representing a 43% performance improvement.

Q: Are there any voltage or supply considerations for substitution?

A: No. Both parts operate within the identical 4.5V to 5.5V supply voltage range. Existing power supply designs require no modification.

Q: What is the significance of the extended temperature range in the 7133LA20PFG?

A: The 7133LA20PFG operates from -55°C to 125°C, compared to the 7133SA35PF range of 0°C to 70°C. This extended range accommodates industrial and automotive applications requiring broader temperature specifications.

Q: Does the 7133LA20PFG maintain the same memory organization?

A: Yes. Both parts feature 32Kbit capacity organized as 2K x 16, with identical dual-port asynchronous SRAM architecture and parallel memory interface.

Q: What is the moisture sensitivity level for both parts?

A: Both parts have MSL 3 rating with a 168-hour floor life. Identical moisture handling and storage procedures apply.

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