Renesas 71024S25TYG 1Mbit Parallel SRAM Equivalent & Substitute Parts

Part Overview

The Renesas 71024S25TYG is a 1Mbit asynchronous parallel SRAM memory IC in 32-SOJ surface mount packaging with 25 ns access time and 128K x 8 memory organization. This part is classified as obsolete, making equivalent and substitute components necessary for ongoing system support and new designs. The 71024S25TYG operates across the commercial temperature range (0°C to 70°C) with 4.5V to 5.5V supply voltage compatibility.

Key Parameters

Parameter	Value
Memory Size	1Mbit
Memory Organization	128K x 8
Memory Format	SRAM
Technology	SRAM - Asynchronous
Access Time	25 ns
Write Cycle Time	25 ns
Memory Interface	Parallel
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	32-BSOJ (0.300", 7.62mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution for the 71024S25TYG is determined by strict equivalence across the following critical parameters:

Memory Size: 1Mbit (non-negotiable)
Memory Organization: 128K x 8 (non-negotiable)
Memory Interface: Parallel (non-negotiable)
Package / Case: 32-BSOJ surface mount (non-negotiable)
Voltage Supply Range: 4.5V ~ 5.5V (non-negotiable)
Access Time: Equal to or faster than 25 ns (backward compatible)
Operating Temperature: Must support minimum 0°C ~ 70°C range

Substitute parts are grouped by access time performance. Parts with faster access times (12 ns, 15 ns, 20 ns, 10 ns) are direct functional substitutes as they meet or exceed the 25 ns specification. Parts from different manufacturers (Renesas, Alliance Memory, IDT) are included where all electrical and mechanical parameters align.

Parameter Comparison

Part Number	Manufacturer	Access Time (ns)	Write Cycle Time (ns)	Operating Temp (°C)	Product Status	RoHS Status
71024S25TYG	Renesas Electronics	25	25	0 ~ 70	Obsolete	Not Specified
71024S12TYG	Renesas Electronics	12	12	0 ~ 70	Active	ROHS3 Compliant
71024S12TYGI	Renesas Electronics	12	12	-40 ~ 85	Active	ROHS3 Compliant
71024S15TYG	Renesas Electronics	15	15	0 ~ 70	Active	ROHS3 Compliant
71024S15TYGI	Renesas Electronics	15	15	-40 ~ 85	Active	ROHS3 Compliant
71024S20TYG	IDT, Integrated Device Technology	20	20	0 ~ 70	Active	Not Specified
71024S20TYGI	Renesas Electronics	20	20	-40 ~ 85	Active	ROHS3 Compliant
AS7C1024B-12TJCN	Alliance Memory, Inc.	12	12	0 ~ 70	Active	ROHS3 Compliant
AS7C1025B-10TJCN	Alliance Memory, Inc.	10	10	0 ~ 70	Active	ROHS3 Compliant
AS7C1025B-12TJCN	Alliance Memory, Inc.	12	12	0 ~ 70	Active	ROHS3 Compliant
AS7C1025B-15TJCN	Alliance Memory, Inc.	15	15	0 ~ 70	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical compatibility with the 71024S25TYG across the specified operating parameters. Selection should prioritize active product status and compliance certifications:

Renesas 71024S15TYG and 71024S15TYGI are primary substitutes, offering 15 ns access time performance with active product status and ROHS3 compliance. The 71024S15TYGI variant extends operating temperature to -40°C ~ 85°C for applications requiring industrial temperature range support.

Alliance Memory AS7C1025B series parts (10 ns, 12 ns, 15 ns variants) provide equivalent functionality with ROHS3 compliance and active status. These parts are suitable for direct replacement in commercial temperature applications.

IDT 71024S20TYG offers 20 ns performance with active status, positioned between the original 25 ns specification and faster alternatives.

For new designs, Renesas 71024S12TYG or 71024S12TYGI provide the fastest available performance (12 ns) with full compliance certifications and active product status.

Frequently Asked Questions (FAQ)

Q: Can I use a faster access time part as a substitute for the 71024S25TYG?

A: Yes. Parts with 12 ns, 15 ns, 20 ns, or 10 ns access times are functionally compatible as direct substitutes. Faster access times maintain backward compatibility with the original 25 ns specification.

Q: What is the difference between standard and "I" suffix variants (e.g., 71024S15TYG vs. 71024S15TYGI)?

A: The "I" suffix indicates extended industrial temperature range operation (-40°C ~ 85°C) compared to commercial range (0°C ~ 70°C). Both variants are electrically identical and pin-compatible. Select the "I" variant only if your application requires operation outside the 0°C ~ 70°C range.

Q: Are Alliance Memory and IDT parts fully compatible with Renesas parts?

A: Yes. All listed substitute parts share identical memory organization (128K x 8), parallel interface, 32-SOJ packaging, and 4.5V ~ 5.5V supply voltage specifications. Pin configuration and electrical characteristics are equivalent.

Q: Does the 71024S25TYG have RoHS compliance?

A: RoHS status is not specified for the 71024S25TYG. If RoHS3 compliance is required for your application, select from active substitute parts explicitly marked as ROHS3 Compliant, such as Renesas 71024S15TYG or Alliance Memory AS7C1025B series.

Q: What packaging options are available for substitutes?

A: All substitute parts use 32-BSOJ (0.300", 7.62mm Width) surface mount packaging, identical to the original 71024S25TYG. Packaging variations (Tube, Bulk) reflect supplier inventory format and do not affect electrical or mechanical compatibility.

Q: Can I mix different manufacturer parts in the same design?

A: Yes. All listed parts meet identical electrical specifications and package requirements. However, maintain consistent sourcing within a production batch to ensure supply chain continuity and identical performance characteristics across units.

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