Equivalent & Substitute Parts for 71V124SA12TYG8

Part Overview

The 71V124SA12TYG8 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 and is housed in a 32-SOJ surface mount package. The part is classified as Last Time Buy, indicating discontinued production status. Alternative equivalent and substitute parts are necessary to ensure design continuity and long-term component availability for new production runs and legacy system maintenance.

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
Supply Voltage	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
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the 71V124SA12TYG8 is determined by the following critical parameters:

Primary Substitution Criteria:

Memory capacity: 1Mbit
Memory organization: 128K x 8
Memory interface: Parallel
Package type: 32-BSOJ (0.300", 7.62mm Width)
Supply voltage range: 3V to 3.6V
RoHS compliance: ROHS3 Compliant
MSL rating: 3 (168 Hours)

Access Time Compatibility: Parts with equal or faster access times (≤12 ns) are direct substitutes. Parts with slower access times (>12 ns) are functional substitutes for applications where timing margins permit.

Temperature Range Consideration: The main part operates 0°C to 70°C. Substitutes with extended temperature ranges (-40°C to 85°C) provide enhanced operational flexibility and are suitable for the specified temperature window.

Product Status: Active status substitutes ensure ongoing availability and manufacturing support compared to Last Time Buy status of the main part.

Parameter Comparison

Part Number	Manufacturer	Access Time (ns)	Write Cycle Time (ns)	Operating Temp (°C)	Product Status	Inventory (Pcs)
71V124SA12TYG8	Renesas Electronics	12	12	0 to 70	Last Time Buy	722
IS63LV1024L-12JL-TR	ISSI	12	12	0 to 70	Active	2851
71V124SA12TYGI8	Renesas Electronics	12	12	-40 to 85	Active	892
71V124SA15TYG8	IDT	15	15	0 to 70	Active	1043
71V124SA15TYGI8	Renesas Electronics	15	15	-40 to 85	Active	1630
AS7C31024B-10TJCNTR	Alliance Memory	10	10	0 to 70	Active	709
AS7C31024B-12TJCNTR	Alliance Memory	12	12	0 to 70	Active	757
AS7C31024B-15TJCNTR	Alliance Memory	15	15	0 to 70	Active	784
AS7C31024B-20TJCNTR	Alliance Memory	20	20	0 to 70	Active	894
AS7C31025B-10TJCNTR	Alliance Memory	10	10	0 to 70	Active	883
AS7C31025B-12TJCNTR	Alliance Memory	12	12	0 to 70	Active	1113

Engineering Selection Recommendations

Direct Equivalents (12 ns Access Time, Active Status):

IS63LV1024L-12JL-TR from ISSI and AS7C31024B-12TJCNTR from Alliance Memory are direct functional equivalents with matching 12 ns access and write cycle times. Both maintain ROHS3 compliance and MSL 3 rating. ISSI part offers higher current inventory (2851 pcs). Both are suitable for drop-in replacement in applications requiring identical timing specifications.

Renesas Ecosystem Substitutes:

71V124SA12TYGI8 provides extended temperature range (-40°C to 85°C) while maintaining 12 ns timing, enabling use in broader thermal environments. 71V124SA15TYGI8 offers extended temperature range with 15 ns timing. Both are Active status with ROHS3 compliance and represent manufacturer-recommended alternatives within the Renesas product line.

Faster Access Time Options:

AS7C31024B-10TJCNTR and AS7C31025B-10TJCNTR provide 10 ns access time, offering performance margin above the 12 ns requirement. These are suitable for applications where faster memory access improves system performance without design modification.

Slower Access Time Alternatives:

AS7C31024B-15TJCNTR (15 ns) and AS7C31024B-20TJCNTR (20 ns) are functional substitutes for applications where timing analysis confirms compatibility with extended access times. These options provide additional inventory availability through Alliance Memory.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and MSL 3 rating consistent with the main part. ECCN and HTSUS classifications are equivalent across all listed substitutes, ensuring regulatory and export compliance continuity.

Frequently Asked Questions (FAQ)

Q: Can I use a 15 ns part as a substitute for the 12 ns 71V124SA12TYG8?

A: Yes, if system timing analysis confirms the application can tolerate the additional 3 ns access delay. Faster memory does not create incompatibility; slower memory requires verification that setup and hold time requirements remain satisfied.

Q: What is the difference between 71V124SA12TYGI8 and 71V124SA12TYG8?

A: Both have identical 12 ns timing and 1Mbit capacity. The primary difference is operating temperature range: 71V124SA12TYGI8 operates -40°C to 85°C versus 0°C to 70°C for the original part. The TYGI8 variant is Active status, ensuring continued availability.

Q: Are ISSI and Alliance Memory parts pin-compatible with Renesas parts?

A: All listed substitutes share the 32-BSOJ package with identical pinout, 128K x 8 organization, parallel interface, and 3V to 3.6V supply voltage. Physical and electrical compatibility is confirmed across all manufacturers.

Q: Which substitute offers the best long-term availability?

A: IS63LV1024L-12JL-TR (ISSI) and 71V124SA15TYGI8 (Renesas) both carry Active product status with substantial inventory levels (2851 and 1630 pcs respectively), ensuring sustained supply for production requirements.

Q: Can I mix different manufacturers in the same design?

A: Yes. All substitutes meet identical electrical specifications for memory capacity, organization, interface, voltage, and package. Mixing manufacturers is permissible provided timing requirements are satisfied across all parts used.

Q: What does MSL 3 (168 Hours) mean for component handling?

A: MSL 3 indicates Moisture Sensitivity Level 3, requiring storage in controlled humidity environments. The 168-hour specification means the component can be exposed to room conditions for up to 168 hours before soldering. All listed parts share this rating, ensuring consistent handling procedures.

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