Renesas Electronics 7133LA55PFI SRAM Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7133LA55PFI is a 32Kbit dual-port asynchronous SRAM memory IC in a 100-TQFP surface mount package. This component operates with a 55 ns access time and write cycle time, supporting parallel memory interface with 2K x 16 organization. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations. Substitute parts must maintain electrical compatibility across memory capacity, interface type, voltage supply range, and thermal operating conditions while potentially offering improved performance characteristics or active product status.

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	55 ns
Write Cycle Time	55 ns
Voltage Supply Range	4.5V to 5.5V
Operating Temperature	-40°C to 85°C
Package Type	100-TQFP (14x14)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the 7133LA55PFI is determined by strict equivalence across the following critical parameters:

Memory Capacity & Organization: Substitute parts must provide 32Kbit capacity with 2K x 16 organization to ensure address and data bus compatibility
Memory Technology: Dual-port asynchronous SRAM architecture is required for functional equivalence
Parallel Interface: Memory interface must remain parallel to maintain system-level compatibility
Voltage Supply: Operating range must encompass 4.5V to 5.5V to ensure compatibility with existing power distribution
Temperature Range: Operating temperature specification must cover -40°C to 85°C minimum
Package & Pinout: 100-TQFP (14x14) surface mount package ensures mechanical and electrical pin compatibility

The 7133LA25PFGI qualifies as a direct substitute based on these parameters. Performance improvements (25 ns access time versus 55 ns) represent a faster variant within the same product family, maintaining full backward compatibility while offering enhanced speed characteristics.

Parameter Comparison

Parameter	7133LA55PFI (Main Part)	7133LA25PFGI (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	55 ns	25 ns
Write Cycle Time	55 ns	25 ns
Voltage Supply Range	4.5V to 5.5V	4.5V to 5.5V
Operating Temperature	-40°C to 85°C	-40°C to 85°C
Package Type	100-TQFP (14x14)	100-TQFP (14x14)
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
RoHS Compliance	Non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The 7133LA25PFGI is the qualified substitute for the obsolete 7133LA55PFI. Selection criteria are based on the following engineering factors:

Product Status: The 7133LA55PFI is classified as obsolete, creating supply chain risk. The 7133LA25PFGI maintains active product status with Renesas Electronics, ensuring long-term availability and manufacturing support.

Regulatory Compliance: The 7133LA25PFGI achieves ROHS3 compliance, meeting current environmental and regulatory requirements. The original 7133LA55PFI is non-compliant with modern RoHS standards.

Performance Characteristics: The 7133LA25PFGI provides improved access time (25 ns versus 55 ns) and write cycle time (25 ns versus 55 ns), delivering faster memory operation while maintaining full electrical and mechanical compatibility.

Electrical & Mechanical Compatibility: Both parts share identical voltage supply range (4.5V to 5.5V), operating temperature range (-40°C to 85°C), memory capacity (32Kbit), organization (2K x 16), and package configuration (100-TQFP). Direct substitution is electrically and mechanically feasible without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the 7133LA25PFGI directly replace the 7133LA55PFI without circuit modifications?

A: Yes. Both parts share identical electrical specifications for voltage supply (4.5V to 5.5V), operating temperature range (-40°C to 85°C), memory capacity (32Kbit), organization (2K x 16), parallel interface, and 100-TQFP package pinout. Direct substitution is supported.

Q: What is the primary advantage of the 7133LA25PFGI over the 7133LA55PFI?

A: The 7133LA25PFGI offers faster memory access time and write cycle time (25 ns versus 55 ns), enabling higher-speed system operation. Additionally, it maintains active product status and achieves ROHS3 compliance, addressing obsolescence and regulatory requirements.

Q: Are there any performance trade-offs when substituting the 7133LA25PFGI?

A: No performance trade-offs exist. The 7133LA25PFGI is a performance upgrade, providing faster access characteristics while maintaining full backward compatibility with systems designed for the 7133LA55PFI.

Q: What packaging format is used for the 7133LA25PFGI?

A: The 7133LA25PFGI is supplied in a 100-TQFP (14x14) surface mount package with tray packaging, matching the mechanical and electrical interface of the original 7133LA55PFI.

Q: Is the 7133LA25PFGI RoHS compliant?

A: Yes. The 7133LA25PFGI is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. The original 7133LA55PFI is RoHS non-compliant.

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