Renesas Electronics 7133SA90G SRAM Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7133SA90G is a 32Kbit dual-port asynchronous SRAM with parallel interface, housed in a 68-pin ball grid array (68-BPGA) package. 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 with 90 ns access time and write cycle time, suitable for applications requiring volatile memory with parallel data access.

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	90 ns
Write Cycle Time	90 ns
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	68-BPGA (29.46x29.46)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the 7133SA90G is determined by strict alignment of core electrical and mechanical parameters. The following criteria establish valid substitution relationships:

Primary Substitution Criteria:

Memory capacity: 32Kbit
Memory organization: 2K x 16
Memory type: Volatile SRAM with dual-port, asynchronous architecture
Memory interface: Parallel
Voltage supply range: 4.5V ~ 5.5V (compatible overlap required)
Access time and write cycle time: Equal or faster performance
Package compatibility: Identical or mechanically compatible pinout

Identified Substitute Parts:

7133SA90GB – Direct package equivalent with extended temperature range
7133LA20JG – Faster access time variant with different package form factor

Parameter Comparison

Parameter	7133SA90G (Main)	7133SA90GB (Substitute)	7133LA20JG (Substitute)
Memory Size	32Kbit	32Kbit	32Kbit
Memory Organization	2K x 16	2K x 16	2K x 16
Memory Type	Volatile SRAM	Volatile SRAM	Volatile SRAM
Technology	Dual Port, Asynchronous	Dual Port, Asynchronous	Dual Port, Asynchronous
Memory Interface	Parallel	Parallel	Parallel
Access Time	90 ns	90 ns	20 ns
Write Cycle Time	90 ns	90 ns	20 ns
Voltage Supply Range	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	-55°C ~ 125°C	0°C ~ 70°C
Package Type	68-BPGA (29.46x29.46)	68-BPGA (29.46x29.46)	68-PLCC (24.21x24.21)
Mounting Type	Through Hole	Through Hole	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	Non-compliant	Non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

7133SA90GB Selection Criteria: The 7133SA90GB is the direct functional equivalent of the 7133SA90G, maintaining identical electrical performance (90 ns access and write cycle times) and package form factor (68-BPGA through-hole). The primary distinction is the extended operating temperature range (-55°C to 125°C versus 0°C to 70°C), making this substitute suitable for applications requiring broader thermal operation. Both parts share non-compliant RoHS status. This substitute is recommended for direct replacement in existing through-hole PCB designs where temperature performance is not a limiting factor.

7133LA20JG Selection Criteria: The 7133LA20JG offers superior speed performance with 20 ns access and write cycle times, compared to the 90 ns specification of the main part. This substitute requires PCB redesign due to package transition from through-hole 68-BPGA to surface-mount 68-PLCC form factor. The 7133LA20JG achieves ROHS3 compliance, addressing regulatory requirements absent in the main part. This substitute is applicable for new designs or board revisions where surface-mount assembly is feasible and faster memory access is beneficial. The smaller package footprint (24.21x24.21 versus 29.46x29.46) provides additional layout advantages.

Frequently Asked Questions (FAQ)

Q: Can the 7133SA90GB directly replace the 7133SA90G without PCB modification? A: Yes. The 7133SA90GB maintains identical package geometry (68-BPGA 29.46x29.46), pinout, and electrical performance (90 ns timing). Through-hole mounting compatibility is preserved. No PCB redesign is required.

Q: What are the key differences between the 7133SA90GB and 7133LA20JG substitutes? A: The 7133SA90GB retains the original through-hole package and 90 ns timing, with extended temperature range. The 7133LA20JG transitions to surface-mount packaging (68-PLCC) and delivers faster 20 ns performance with ROHS3 compliance. Package and mounting type differences necessitate PCB redesign for the 7133LA20JG.

Q: Is the 7133LA20JG suitable for direct socket replacement? A: No. The 7133LA20JG uses a different package type (68-PLCC surface-mount versus 68-BPGA through-hole) and requires PCB layout modification. Pinout compatibility must be verified during design transition.

Q: What is the impact of the extended temperature range in the 7133SA90GB? A: The 7133SA90GB operates across -55°C to 125°C, compared to the main part's 0°C to 70°C range. This extended specification accommodates industrial and automotive applications with broader thermal requirements. Electrical performance remains unchanged at 90 ns.

Q: Does the 7133LA20JG's faster access time affect circuit design? A: The 7133LA20JG's 20 ns timing is faster than the original 90 ns specification. In most applications, faster memory access improves system performance without requiring design changes. Timing-critical circuits may benefit from reduced memory latency.

Q: Are there RoHS compliance considerations for substitute selection? A: The main part (7133SA90G) and 7133SA90GB are RoHS non-compliant. The 7133LA20JG achieves ROHS3 compliance. For applications subject to RoHS regulations, the 7133LA20JG is the compliant option, contingent on PCB redesign feasibility.

Q: What inventory status should influence substitute selection? A: The 7133SA90GB (832 pcs) and 7133LA20JG (975 pcs) are both in active production with available inventory. The main part (7133SA90G) is obsolete with limited stock (1120 pcs). For long-term supply assurance, active-status substitutes are recommended.

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