Equivalent & Substitute Parts for 7133SA35PFG8

Part Overview

The 7133SA35PFG8 is a 32Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation in a 100-TQFP package. This volatile memory device operates with a 35 ns access time and write cycle time, supporting parallel memory interface with 2K x 16 organization. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this memory specification.

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
Operating Temperature	-55°C ~ 125°C
Package Type	100-TQFP (14x14)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the 7133SA35PFG8 is determined by the following critical parameters:

Memory capacity (32Kbit) and organization (2K x 16)
Dual-port asynchronous SRAM technology
Parallel memory interface
Package type (100-TQFP with identical footprint)
Supply voltage range (4.5V ~ 5.5V)
Operating temperature range (-55°C ~ 125°C)
RoHS3 compliance and MSL rating

The 7133LA20PFG8 qualifies as a direct substitute because it maintains identical memory capacity, organization, technology, interface, package, voltage, temperature, and compliance specifications. The primary difference is improved access time and write cycle time performance (20 ns versus 35 ns), which represents a performance enhancement rather than a limitation for compatibility.

Parameter Comparison

Parameter	7133SA35PFG8 (Main Part)	7133LA20PFG8 (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
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
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Package Type	100-TQFP (14x14)	100-TQFP (14x14)
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)
Product Status	Last Time Buy	Active

Engineering Selection Recommendations

The 7133LA20PFG8 is the qualified substitute for the 7133SA35PFG8. Both parts maintain identical electrical and mechanical specifications across all critical parameters, including memory capacity, organization, interface type, package footprint, voltage range, and temperature operating range. Both parts carry ROHS3 compliance and equivalent MSL ratings.

The primary distinction is product lifecycle status: the 7133SA35PFG8 is in Last Time Buy phase, while the 7133LA20PFG8 maintains Active status with current manufacturing availability. The 7133LA20PFG8 offers superior timing performance with 20 ns access and write cycle times compared to 35 ns, providing enhanced speed capability without any electrical or mechanical incompatibility.

Selection of the 7133LA20PFG8 is appropriate for new designs and ongoing production requirements where supply continuity is essential.

Frequently Asked Questions (FAQ)

Q: Can the 7133LA20PFG8 be used as a direct replacement for the 7133SA35PFG8 in existing designs?

A: Yes. Both parts share identical memory capacity (32Kbit), organization (2K x 16), dual-port asynchronous SRAM technology, parallel interface, 100-TQFP package footprint, supply voltage range (4.5V ~ 5.5V), and operating temperature range (-55°C ~ 125°C). The 7133LA20PFG8 provides faster access and write cycle times (20 ns versus 35 ns), which is compatible with designs specified for the slower part.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the 100-TQFP (14x14) package with identical footprints and pinouts. Surface mount assembly compatibility is maintained without modification.

Q: What is the significance of the timing difference between 35 ns and 20 ns?

A: The 7133LA20PFG8 provides faster memory access and write cycle times. This represents improved performance and does not create incompatibility with designs specified for the 35 ns part. Designs requiring the slower timing specification will operate correctly with the faster substitute.

Q: Are both parts RoHS compliant?

A: Yes. Both the 7133SA35PFG8 and 7133LA20PFG8 are ROHS3 compliant with identical MSL ratings of 3 (168 Hours).

Q: Why is the 7133SA35PFG8 in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer has discontinued production planning for this part number. The 7133LA20PFG8 remains in Active production status, making it the recommended choice for ongoing supply requirements.

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