Equivalent & Substitute Parts for 71024S25TYGI

Part Overview

The 71024S25TYGI is a 1Mbit asynchronous SRAM memory IC manufactured by Renesas Electronics Corporation, packaged in a 32-SOJ surface mount configuration with a 25 ns access time. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The device operates within the 4.5V to 5.5V supply voltage range and supports industrial temperature specifications from -40°C to 85°C.

Key Parameters

Parameter	Value
Memory Size	1Mbit
Memory Organization	128K x 8
Memory Interface	Parallel
Access Time	25 ns
Write Cycle Time	25 ns
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	32-BSOJ (0.300", 7.62mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution for the 71024S25TYGI is determined by strict equivalence in the following parameters:

Memory capacity: 1Mbit
Memory organization: 128K x 8
Memory interface: Parallel
Package type: 32-BSOJ (0.300", 7.62mm Width)
Supply voltage range: 4.5V ~ 5.5V
Operating temperature range: -40°C ~ 85°C
Mounting type: Surface Mount
Moisture sensitivity level: 3 (168 Hours)

Access time and write cycle time are performance characteristics that may vary among substitutes. Faster access times (lower nanosecond values) are functionally compatible with the original 25 ns specification, as they represent improved performance within the same electrical and mechanical envelope.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Organization	Access Time	Write Cycle Time	Voltage Supply	Operating Temp	Package	Product Status	RoHS Status
71024S25TYGI	Renesas Electronics	1Mbit	128K x 8	25 ns	25 ns	4.5V ~ 5.5V	-40°C ~ 85°C	32-BSOJ	Obsolete	Not Specified
71024S12TYGI	Renesas Electronics	1Mbit	128K x 8	12 ns	12 ns	4.5V ~ 5.5V	-40°C ~ 85°C	32-BSOJ	Active	ROHS3 Compliant
71024S15TYGI	Renesas Electronics	1Mbit	128K x 8	15 ns	15 ns	4.5V ~ 5.5V	-40°C ~ 85°C	32-BSOJ	Active	ROHS3 Compliant
71024S20TYGI	Renesas Electronics	1Mbit	128K x 8	20 ns	20 ns	4.5V ~ 5.5V	-40°C ~ 85°C	32-BSOJ	Active	ROHS3 Compliant
IS61C1024AL-12JLI	ISSI	1Mbit	128K x 8	12 ns	12 ns	4.5V ~ 5.5V	-40°C ~ 85°C	32-BSOJ	Active	ROHS3 Compliant
IS61C1024AL-12JLI-TR	ISSI	1Mbit	128K x 8	12 ns	12 ns	4.5V ~ 5.5V	-40°C ~ 85°C	32-BSOJ	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain electrical and mechanical compatibility with the 71024S25TYGI. Selection among substitutes should be based on the following criteria:

Product Status: The 71024S25TYGI is obsolete. All substitute parts listed are in active production status, ensuring long-term availability and supply chain stability.

Compliance: All substitute parts are ROHS3 compliant, whereas the original part does not specify RoHS status. For applications requiring regulatory compliance, ROHS3-compliant substitutes are preferred.

Manufacturer Options: Renesas Electronics 71024S series parts (71024S12TYGI, 71024S15TYGI, 71024S20TYGI) maintain the same manufacturer as the original part. ISSI IS61C1024AL series parts provide cross-manufacturer alternatives with identical electrical specifications.

Performance Characteristics: All substitute parts feature equal or faster access times and write cycle times compared to the original 25 ns specification. The 71024S20TYGI provides the closest performance match at 20 ns, while 71024S12TYGI and IS61C1024AL variants offer enhanced performance at 12 ns.

Packaging Considerations: The IS61C1024AL-12JLI-TR variant is supplied in Tape & Reel format, suitable for high-volume automated assembly. The IS61C1024AL-12JLI is supplied in Tray format. Renesas 71024S variants are supplied in Tube packaging.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with faster access time than the original 71024S25TYGI?

A: Yes. Faster access times (lower nanosecond values) are functionally compatible. A 12 ns or 15 ns part will operate correctly in applications designed for 25 ns access time, as it represents improved performance within the same electrical and mechanical specifications.

Q: Are all substitute parts pin-compatible with the 71024S25TYGI?

A: Yes. All listed substitutes use the identical 32-BSOJ package with 0.300" (7.62mm) width, ensuring direct pin-for-pin compatibility on the PCB.

Q: What is the difference between IS61C1024AL-12JLI and IS61C1024AL-12JLI-TR?

A: Both parts are electrically identical 1Mbit SRAM devices with 12 ns access time. The primary difference is packaging format: IS61C1024AL-12JLI is supplied in Tray format, while IS61C1024AL-12JLI-TR is supplied in Tape & Reel (TR) format for automated assembly processes.

Q: Why should I choose a Renesas substitute over an ISSI substitute?

A: Renesas 71024S series parts maintain continuity with the original manufacturer. ISSI IS61C1024AL parts provide equivalent functionality with broader availability. Selection depends on supply chain preferences and inventory management strategies.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts are ROHS3 compliant. The original 71024S25TYGI does not specify RoHS status. For applications requiring RoHS compliance documentation, substitute parts provide certified compliance.

Q: What is the Moisture Sensitivity Level (MSL) for substitute parts?

A: All substitute parts maintain MSL 3 (168 Hours) rating, identical to the original part, ensuring equivalent handling and storage requirements.

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