IDT71V424L10PH Equivalent & Substitute Parts

Part Overview

The IDT71V424L10PH is a 4Mbit asynchronous SRAM memory IC in 44-TSOP II packaging with 10 ns access time and parallel interface. This part is classified as obsolete, making equivalent substitutes necessary for ongoing system support and new designs. Substitute parts must maintain electrical compatibility across memory organization, access timing, voltage supply range, and thermal operating conditions while meeting current RoHS compliance requirements.

Key Parameters

Parameter	IDT71V424L10PH
Memory Size	4Mbit
Memory Organization	512K x 8
Memory Interface	Parallel
Access Time	10 ns
Write Cycle Time	10 ns
Voltage Supply Range	3V ~ 3.6V
Operating Temperature	0°C ~ 70°C
Package / Case	44-TSOP (0.400", 10.16mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Mandatory Compatibility Parameters:

Memory Size: 4Mbit
Memory Organization: 512K x 8
Memory Interface: Parallel
Access Time: 10 ns or faster
Write Cycle Time: 10 ns or faster
Package / Case: 44-TSOP II
Mounting Type: Surface Mount

Voltage Supply Range Compatibility: Substitute parts must support the original 3V ~ 3.6V range. Parts with extended lower voltage limits (2.4V minimum) remain compatible as they encompass the original range.

Operating Temperature Consideration: The original part operates 0°C ~ 70°C. Substitute parts with extended temperature ranges (-40°C ~ 85°C or -40°C ~ 125°C) provide broader operational capability and are functionally compatible.

Compliance Status: All listed substitutes are active products with ROHS3 compliance, addressing the obsolescence and compliance limitations of the original part.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Organization	Access Time	Voltage Supply	Operating Temp	Package	Product Status	RoHS Status	Packaging Type
IDT71V424L10PH	Renesas Electronics	4Mbit	512K x 8	10 ns	3V ~ 3.6V	0°C ~ 70°C	44-TSOP II	Obsolete	Non-compliant	Not specified
71V424L10PHG	Renesas Electronics	4Mbit	512K x 8	10 ns	3V ~ 3.6V	0°C ~ 70°C	44-TSOP II	Active	ROHS3 Compliant	Tube
IS61LV5128AL-10TLI	ISSI	4Mbit	512K x 8	10 ns	3.135V ~ 3.6V	-40°C ~ 85°C	44-TSOP II	Active	ROHS3 Compliant	Tray
IS61LV5128AL-10TLI-TR	ISSI	4Mbit	512K x 8	10 ns	3.135V ~ 3.6V	-40°C ~ 85°C	44-TSOP II	Active	ROHS3 Compliant	Tape & Reel
IS61WV5128BLL-10TLI	ISSI	4Mbit	512K x 8	10 ns	2.4V ~ 3.6V	-40°C ~ 85°C	44-TSOP II	Active	ROHS3 Compliant	Tray
IS61WV5128BLL-10TLI-TR	ISSI	4Mbit	512K x 8	10 ns	2.4V ~ 3.6V	-40°C ~ 85°C	44-TSOP II	Active	ROHS3 Compliant	Tape & Reel
IS61WV5128EDBLL-10TLI	ISSI	4Mbit	512K x 8	10 ns	2.4V ~ 3.6V	-40°C ~ 85°C	44-TSOP II	Active	ROHS3 Compliant	Tray
IS61WV5128EDBLL-10TLI-TR	ISSI	4Mbit	512K x 8	10 ns	2.4V ~ 3.6V	-40°C ~ 85°C	44-TSOP II	Active	ROHS3 Compliant	Tape & Reel
IS64WV5128EDBLL-10CTLA3	ISSI	4Mbit	512K x 8	10 ns	2.4V ~ 3.6V	-40°C ~ 125°C	44-TSOP II	Active	ROHS3 Compliant	Tray
IS64WV5128EDBLL-10CTLA3-TR	ISSI	4Mbit	512K x 8	10 ns	2.4V ~ 3.6V	-40°C ~ 125°C	44-TSOP II	Active	ROHS3 Compliant	Tape & Reel

Engineering Selection Recommendations

Primary Substitute (Renesas Electronics): The 71V424L10PHG is the direct Renesas equivalent, maintaining identical electrical specifications and thermal range as the original IDT71V424L10PH while achieving active product status and ROHS3 compliance. This part is recommended for designs requiring minimal specification changes and continuity with the original manufacturer.

ISSI Substitutes (Extended Temperature Range): The IS61LV5128AL-10TLI and IS61LV5128AL-10TLI-TR maintain the 3.135V ~ 3.6V supply range compatible with the original specification while extending operating temperature to -40°C ~ 85°C. These parts are suitable for applications requiring broader thermal operation.

ISSI Substitutes (Extended Voltage and Temperature Range): The IS61WV5128BLL-10TLI, IS61WV5128BLL-10TLI-TR, IS61WV5128EDBLL-10TLI, and IS61WV5128EDBLL-10TLI-TR support 2.4V ~ 3.6V supply range and -40°C ~ 85°C operating temperature. These parts provide enhanced operational flexibility while maintaining 10 ns access and write cycle times.

ISSI Substitutes (Extended Temperature to 125°C): The IS64WV5128EDBLL-10CTLA3 and IS64WV5128EDBLL-10CTLA3-TR extend operating temperature to -40°C ~ 125°C with 2.4V ~ 3.6V supply range. These parts are specified for high-temperature industrial applications.

All substitute parts maintain 4Mbit capacity, 512K x 8 organization, parallel interface, 10 ns timing specifications, 44-TSOP II packaging, and surface mount configuration. Selection should be based on packaging requirements (Tray vs. Tape & Reel), voltage supply constraints, and thermal operating environment.

Frequently Asked Questions (FAQ)

Q: Can IS61WV5128BLL-10TLI replace IDT71V424L10PH directly? A: Yes. The IS61WV5128BLL-10TLI meets all mandatory compatibility parameters: 4Mbit capacity, 512K x 8 organization, parallel interface, 10 ns access time, and 44-TSOP II packaging. The extended voltage range (2.4V ~ 3.6V) encompasses the original 3V ~ 3.6V specification. Extended operating temperature (-40°C ~ 85°C) provides broader capability than the original 0°C ~ 70°C range.

Q: What is the difference between Tray and Tape & Reel packaging? A: Tray packaging is suitable for manual handling and smaller production volumes. Tape & Reel packaging (indicated by -TR suffix) is designed for automated pick-and-place assembly equipment and high-volume manufacturing. Both packaging types contain identical die and electrical specifications.

Q: Why does IS64WV5128EDBLL-10CTLA3 have a higher operating temperature limit? A: The IS64WV5128EDBLL-10CTLA3 is specified for -40°C ~ 125°C operation, extending the upper thermal limit to 125°C compared to 85°C for other ISSI substitutes. This part is designed for industrial and automotive applications requiring enhanced high-temperature performance while maintaining identical memory capacity, organization, and access timing.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitute parts are ROHS3 compliant, addressing the RoHS non-compliance status of the original IDT71V424L10PH. This compliance is mandatory for new designs and system updates.

Q: What is the voltage supply compatibility range for substitution? A: The original IDT71V424L10PH operates at 3V ~ 3.6V. Substitute parts with 3.135V ~ 3.6V or 2.4V ~ 3.6V ranges are compatible because they encompass the original specification. Parts with lower minimum voltage limits provide additional operational margin.

Q: Can I use IS61LV5128AL-10TLI in place of IS61WV5128BLL-10TLI? A: Both parts are electrically compatible substitutes for the original IDT71V424L10PH. The IS61LV5128AL-10TLI operates at 3.135V ~ 3.6V, while IS61WV5128BLL-10TLI operates at 2.4V ~ 3.6V. Selection depends on your system's voltage supply constraints and whether extended low-voltage operation is required.

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