IDT71024S20TY Equivalent & Substitute Parts

Part Overview

The IDT71024S20TY is a 1Mbit asynchronous SRAM (Static Random Access Memory) IC with parallel interface, manufactured by Renesas Electronics Corporation. This device features 128K x 8 memory organization, 20 ns access time, and operates within the 4.5V to 5.5V supply voltage range in a 32-SOJ surface mount package. The part is classified as obsolete, necessitating identification of equivalent alternatives for ongoing system support and new designs requiring this memory capacity and performance tier.

Key Parameters

Parameter	Value
Memory Type	Volatile SRAM
Memory Size	1Mbit
Memory Organization	128K x 8
Memory Interface	Parallel
Access Time	20 ns
Write Cycle Time	20 ns
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	32-BSOJ (0.300", 7.62mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the IDT71024S20TY is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Memory capacity: 1Mbit
Memory organization: 128K x 8
Memory interface: Parallel
Package type: 32-BSOJ (0.300", 7.62mm Width)
Mounting type: Surface Mount
Voltage supply range: 4.5V ~ 5.5V (minimum overlap required)

Performance Parameters:

Access time: 20 ns or faster
Write cycle time: 20 ns or faster

Substitute parts must maintain identical memory capacity, organization, and package specifications. Access time and write cycle time may be equal to or faster than the original specification, as faster devices are backward compatible in timing-critical applications. Voltage supply ranges must overlap with the original 4.5V to 5.5V specification to ensure proper operation in existing designs.

Parameter Comparison

Parameter	IDT71024S20TY	71024S20TYG	IS61C1024AL-12JLI	IS61C1024AL-12JLI-TR
Manufacturer	Renesas Electronics	IDT	ISSI	ISSI
Memory Size	1Mbit	1Mbit	1Mbit	1Mbit
Memory Organization	128K x 8	128K x 8	128K x 8	128K x 8
Access Time	20 ns	20 ns	12 ns	12 ns
Write Cycle Time	20 ns	20 ns	12 ns	12 ns
Voltage Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	32-BSOJ	32-BSOJ	32-BSOJ	32-BSOJ
Product Status	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Not specified	Bulk	Tray	Tape & Reel

Engineering Selection Recommendations

71024S20TYG (IDT): This part maintains identical electrical specifications and operating temperature range to the IDT71024S20TY. It serves as a direct functional equivalent with active product status, ensuring continued availability. The 20 ns access and write cycle times match the original specification exactly. This option is suitable for applications requiring exact performance parity with the obsolete Renesas device.

IS61C1024AL-12JLI (ISSI, Tray): This substitute provides improved performance with 12 ns access and write cycle times, representing a 40% speed improvement over the original specification. The extended operating temperature range (-40°C to 85°C) accommodates broader environmental conditions. ROHS3 compliance addresses regulatory requirements for new designs. Tray packaging supports moderate-volume production environments.

IS61C1024AL-12JLI-TR (ISSI, Tape & Reel): Functionally identical to the IS61C1024AL-12JLI with identical electrical and performance specifications. Tape & Reel packaging is optimized for high-volume automated assembly processes. ROHS3 compliance and extended temperature range are maintained. This configuration is preferred for production volumes exceeding standard tray quantities.

Frequently Asked Questions (FAQ)

Q: Can the IS61C1024AL-12JLI series replace the IDT71024S20TY in existing designs?

A: Yes. The IS61C1024AL-12JLI and IS61C1024AL-12JLI-TR maintain identical memory capacity (1Mbit), organization (128K x 8), package type (32-BSOJ), and voltage supply range (4.5V to 5.5V). The faster 12 ns access time is backward compatible with designs specified for 20 ns operation. Pin-to-pin compatibility is maintained.

Q: What is the difference between 71024S20TYG and IS61C1024AL-12JLI?

A: Both are functional substitutes for the obsolete IDT71024S20TY. The 71024S20TYG maintains identical 20 ns timing specifications and 0°C to 70°C operating temperature. The IS61C1024AL-12JLI offers faster 12 ns performance and extended -40°C to 85°C temperature range with ROHS3 compliance. Selection depends on whether exact timing match or enhanced performance and compliance are prioritized.

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

A: These parts are electrically and functionally identical. The primary difference is packaging format: IS61C1024AL-12JLI is supplied in Tray format for moderate-volume applications, while IS61C1024AL-12JLI-TR is supplied in Tape & Reel format for high-volume automated assembly. Select based on production volume and assembly equipment requirements.

Q: Are all substitute parts pin-compatible with the IDT71024S20TY?

A: Yes. All listed substitutes use the 32-BSOJ package with identical pinout and mechanical dimensions (0.300", 7.62mm width). Direct socket replacement is possible without PCB modification.

Q: Does the faster access time of IS61C1024AL-12JLI create compatibility issues?

A: No. Faster access time is backward compatible. Designs specified for 20 ns operation will function correctly with 12 ns devices. The faster response time does not introduce timing violations in systems designed for the slower specification.

Q: What is the significance of ROHS3 compliance on the ISSI parts?

A: ROHS3 compliance indicates the parts meet Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. This is required for products sold in the European Union and many other markets. The IDT71024S20TY is non-compliant, making ROHS3-compliant substitutes necessary for new designs subject to these regulations.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message