71V124SA12TYG Equivalent & Substitute Parts

Part Overview

The 71V124SA12TYG is a 1Mbit asynchronous SRAM memory IC manufactured by Renesas Electronics Corporation, configured as 128K x 8 with parallel interface and 12 ns access time. This component operates at 3V to 3.6V supply voltage across the commercial temperature range of 0°C to 70°C. The device is packaged in a 32-SOJ surface mount package and carries Last Time Buy product status, indicating discontinued production. Equivalent and substitute parts are necessary to maintain design continuity and ensure long-term component availability for new production runs and legacy system support.

Key Parameters

Parameter	Value
Memory Type	Volatile SRAM
Memory Size	1Mbit
Memory Organization	128K x 8
Memory Interface	Parallel
Access Time	12 ns
Write Cycle Time	12 ns
Voltage Supply	3V to 3.6V
Operating Temperature	0°C to 70°C
Package Type	32-BSOJ (0.300", 7.62mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the 71V124SA12TYG is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Memory Size: 1Mbit
Memory Organization: 128K x 8
Memory Interface: Parallel
Package Type: 32-BSOJ (0.300", 7.62mm Width)
Voltage Supply: 3V to 3.6V
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 3 (168 Hours)

Secondary Compatibility Factors:

Access Time: 12 ns or faster (lower access time values are functionally compatible)
Write Cycle Time: 12 ns or faster
Operating Temperature: 0°C to 70°C minimum (extended temperature ranges are compatible)

Substitute parts are grouped into two categories based on access time specifications. Parts with 12 ns access time provide direct functional equivalence. Parts with faster access times (10 ns) are forward-compatible and provide performance enhancement. Parts with slower access times (15 ns, 20 ns) are backward-compatible for applications with relaxed timing requirements.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Organization	Access Time (ns)	Write Cycle (ns)	Voltage (V)	Temp Range (°C)	Package	Product Status
71V124SA12TYG	Renesas	1Mbit	128K x 8	12	12	3.0-3.6	0 to 70	32-BSOJ	Last Time Buy
71V124SA15TYG	Renesas	1Mbit	128K x 8	15	15	3.0-3.6	0 to 70	32-BSOJ	Active
71V124SA15TYGI	Renesas	1Mbit	128K x 8	15	15	3.0-3.6	-40 to 85	32-BSOJ	Last Time Buy
IS63LV1024L-12JL-TR	ISSI	1Mbit	128K x 8	12	12	3.0-3.6	0 to 70	32-BSOJ	Active
AS7C31024B-10TJCN	Alliance Memory	1Mbit	128K x 8	10	10	3.0-3.6	0 to 70	32-BSOJ	Active
AS7C31024B-12TJCN	Alliance Memory	1Mbit	128K x 8	12	12	3.0-3.6	0 to 70	32-BSOJ	Active
AS7C31024B-15TJCN	Alliance Memory	1Mbit	128K x 8	15	15	3.0-3.6	0 to 70	32-BSOJ	Active
AS7C31024B-20TJCN	Alliance Memory	1Mbit	128K x 8	20	20	3.0-3.6	0 to 70	32-BSOJ	Active
AS7C31025B-10TJCN	Alliance Memory	1Mbit	128K x 8	10	10	3.0-3.6	0 to 70	32-BSOJ	Active
AS7C31025B-12TJCN	Alliance Memory	1Mbit	128K x 8	12	12	3.0-3.6	0 to 70	32-BSOJ	Active
AS7C31025B-12TJIN	Alliance Memory	1Mbit	128K x 8	12	12	3.0-3.6	-40 to 85	32-BSOJ	Active

Engineering Selection Recommendations

Direct Equivalents (12 ns Access Time, Commercial Temperature Range):

The IS63LV1024L-12JL-TR from ISSI and AS7C31024B-12TJCN from Alliance Memory provide direct functional equivalence to the 71V124SA12TYG. Both parts maintain identical access time, write cycle time, voltage supply range, and operating temperature specifications. The IS63LV1024L-12JL-TR carries Active product status with established supply chain availability. The AS7C31024B-12TJCN also maintains Active status. Both are ROHS3 compliant with matching MSL ratings.

Performance-Enhanced Substitutes (10 ns Access Time):

The AS7C31024B-10TJCN and AS7C31025B-10TJCN from Alliance Memory provide faster access times while maintaining all other electrical and mechanical compatibility parameters. These parts are suitable for applications where improved performance margins are beneficial. Both maintain Active product status and full compliance certifications.

Extended Temperature Range Alternatives:

The 71V124SA15TYGI from Renesas and AS7C31025B-12TJIN from Alliance Memory extend the operating temperature range to -40°C to 85°C while maintaining 12 ns access time specifications. These parts accommodate industrial and automotive temperature requirements. The 71V124SA15TYGI carries Last Time Buy status; the AS7C31025B-12TJIN maintains Active status.

Backward-Compatible Substitutes (Slower Access Times):

The 71V124SA15TYG, AS7C31024B-15TJCN, and AS7C31024B-20TJCN provide slower access times of 15 ns and 20 ns respectively. These parts are functionally compatible for applications with relaxed timing requirements and offer extended component availability through Active product status.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with faster access time than the original 71V124SA12TYG?

A: Yes. Parts with 10 ns access time (AS7C31024B-10TJCN, AS7C31025B-10TJCN) are forward-compatible. Faster access times do not create timing violations in circuits designed for 12 ns operation. The system will function correctly with improved performance margins.

Q: Are parts with 15 ns or 20 ns access times compatible with the 71V124SA12TYG?

A: Compatibility depends on circuit timing requirements. If the original design specifies 12 ns access time as a critical parameter, slower substitutes may not meet timing specifications. If the circuit has timing margin, slower parts may function. Circuit analysis is required to determine compatibility for each specific application.

Q: What is the difference between the Renesas 71V124SA15TYG and 71V124SA15TYGI?

A: Both parts share identical electrical specifications (1Mbit, 128K x 8, 15 ns access time, 3V-3.6V supply). The primary difference is operating temperature range: 71V124SA15TYG operates 0°C to 70°C (commercial), while 71V124SA15TYGI operates -40°C to 85°C (industrial). The TYGI variant is suitable for extended temperature applications.

Q: Can I substitute an Alliance Memory part for a Renesas part?

A: Yes, provided all electrical and mechanical parameters match. The AS7C31024B-12TJCN and AS7C31025B-12TJCN from Alliance Memory are electrically and mechanically equivalent to the 71V124SA12TYG. Both manufacturers produce ROHS3 compliant parts with identical package specifications and voltage/temperature ratings.

Q: What does the package designation 32-BSOJ mean?

A: The 32-BSOJ package is a 32-pin Ball Small Outline J-lead surface mount package with 0.300 inches (7.62mm) width. All substitute parts listed use this identical package, ensuring mechanical compatibility with existing PCB layouts and sockets.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, matching the original 71V124SA12TYG. All parts also maintain Moisture Sensitivity Level 3 (168 Hours) rating.

Q: Why is the 71V124SA12TYG marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer has discontinued production. Existing inventory is available for purchase, but no future production is planned. Substitution with Active status parts (such as IS63LV1024L-12JL-TR or AS7C31024B-12TJCN) ensures long-term component availability for ongoing production requirements.

Q: What is the difference between AS7C31024B and AS7C31025B series?

A: Both series are 1Mbit SRAM with 128K x 8 organization and identical electrical specifications. The AS7C31024B and AS7C31025B variants are functionally equivalent for the parameters specified in this reference. Selection between series should be based on availability and product status.

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