Equivalent & Substitute Parts for Renesas Electronics 7133SA70G

Part Overview

The Renesas Electronics 7133SA70G is a 32Kbit dual-port asynchronous SRAM with parallel interface, organized as 2K x 16 bits. This through-hole mounted device operates at 70 ns access time and write cycle time in a 68-PGA package. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. Substitute parts maintain core memory functionality while offering improvements in performance, compliance, or operational temperature range.

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	70 ns
Write Cycle Time	70 ns
Supply Voltage	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	68-BPGA Through Hole

Substitute Part Grouping Explanation

Substitution for the 7133SA70G is determined by the following critical parameters:

Memory capacity (32Kbit), organization (2K x 16), interface type (parallel), and supply voltage (4.5V ~ 5.5V) must remain constant across all substitutes. The dual-port asynchronous SRAM technology is a core functional requirement.

Access time and write cycle time may be equal to or faster than the original 70 ns specification, as faster devices are backward compatible with designs requiring 70 ns operation.

Operating temperature range may be extended beyond the original 0°C ~ 70°C specification without affecting compatibility in standard industrial applications.

Package type and mounting method are independent substitution criteria. Through-hole (68-PGA) and surface-mount (68-PLCC) packages represent distinct mechanical implementations suitable for different PCB assembly methods.

Product status (active versus obsolete) and compliance certifications (RoHS, REACH) are selection factors for new designs and regulatory requirements but do not affect electrical compatibility.

Parameter Comparison

Parameter	7133SA70G (Main)	7133LA20JG (Substitute)	7133SA90GB (Substitute)
Manufacturer	Renesas Electronics	Renesas Electronics	Renesas Electronics
Memory Size	32Kbit	32Kbit	32Kbit
Memory Organization	2K x 16	2K x 16	2K x 16
Memory Format	Dual Port Asynchronous	Dual Port Asynchronous	Dual Port Asynchronous
Access Time	70 ns	20 ns	90 ns
Write Cycle Time	70 ns	20 ns	90 ns
Supply Voltage	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 Through Hole	68-PLCC Surface Mount	68-BPGA Through Hole
Product Status	Obsolete	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	Non-compliant

Engineering Selection Recommendations

7133LA20JG is suitable for new designs requiring active product status and RoHS3 compliance. This substitute offers superior access time (20 ns versus 70 ns), providing performance margin for timing-critical applications. Surface-mount packaging requires PCB redesign from through-hole implementation. Operating temperature range matches the original specification.

7133SA90GB maintains identical through-hole 68-PGA packaging, enabling direct mechanical substitution without PCB modification. Access time is 90 ns, which exceeds the original 70 ns specification and is suitable only for applications with relaxed timing requirements. Extended operating temperature range (-55°C ~ 125°C) supports industrial and military environments. Product status is active, but RoHS compliance status remains non-compliant.

Selection between substitutes depends on design constraints: packaging compatibility, compliance requirements, and timing margins.

Frequently Asked Questions (FAQ)

Q: Can 7133LA20JG replace 7133SA70G in existing designs? A: Electrical substitution is valid due to identical memory capacity, organization, interface, and supply voltage. Mechanical substitution requires PCB redesign because 7133LA20JG uses surface-mount 68-PLCC packaging while 7133SA70G uses through-hole 68-PGA packaging.

Q: Is 7133SA90GB a direct replacement for 7133SA70G? A: 7133SA90GB provides direct mechanical substitution with identical through-hole 68-PGA packaging. Access time is 90 ns, which is slower than the original 70 ns. This substitute is compatible only with applications that do not require 70 ns timing performance.

Q: What is the significance of the 20 ns access time in 7133LA20JG? A: The 20 ns access time is faster than the original 70 ns specification. Faster memory devices are backward compatible with designs specified for 70 ns operation, providing additional timing margin without functional impact.

Q: Does operating temperature range affect substitution compatibility? A: Operating temperature range does not affect electrical compatibility within the specified supply voltage and memory organization. Extended temperature range in 7133SA90GB (-55°C ~ 125°C) is beneficial for industrial applications but not required for standard 0°C ~ 70°C environments.

Q: Why is RoHS compliance relevant for substitution? A: RoHS compliance is a regulatory requirement for new designs and products sold in regulated markets. 7133LA20JG is ROHS3 compliant, making it suitable for new designs subject to RoHS requirements. Existing designs using non-compliant parts may continue operation without modification.

Q: Can both substitutes be used interchangeably in the same application? A: No. 7133LA20JG and 7133SA90GB have different package types and access times. Selection depends on specific design requirements for packaging, timing performance, and compliance certifications.

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