AS7C1024B-20JCN Equivalent & Substitute Parts

Part Overview

The AS7C1024B-20JCN is an asynchronous SRAM memory IC with 1Mbit capacity and 20 ns access time, manufactured by Alliance Memory, Inc. This component is actively produced and widely used in parallel memory applications requiring volatile storage with standard TTL-compatible voltage levels. Substitute parts are identified when equivalent memory capacity, organization, interface type, and package specifications are maintained while allowing variations in access time performance.

Substiute Parts

AS7C1024B-20JCN

Alliance Memory, Inc.In Stock: 1620AS7C1024B-20JCN Datasheet

Current PartRFQ

AS7C1024B-12JCN

Alliance Memory, Inc.In Stock: 1502AS7C1024B-12JCN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AS7C1024B-20JCN are identified based on the following criteria:

• Memory capacity and organization must remain 1Mbit with 128K x 8 configuration
• Memory interface must be parallel
• Package type must be 32-BSOJ surface mount
• Voltage supply range must be compatible: 4.5V ~ 5.5V
• Operating temperature range must be 0°C ~ 70°C
• Manufacturer must be Alliance Memory, Inc.
• Base product number must be AS7C1024

Access time may vary, provided the substitute part meets or exceeds the performance requirements of the application. The AS7C1024B-12JCN qualifies as a direct substitute because it maintains all core electrical and mechanical parameters while offering improved access time performance (12 ns versus 20 ns).

Parameter Comparison

Engineering Selection Recommendations

Both the AS7C1024B-20JCN and AS7C1024B-12JCN are active products with identical RoHS3 compliance and REACH unaffected status. The AS7C1024B-12JCN provides superior access time performance (12 ns) compared to the main part (20 ns) while maintaining full electrical and mechanical compatibility. Selection between these parts depends on application timing requirements and cost considerations. Both components are suitable for designs requiring 1Mbit parallel SRAM with 32-SOJ surface mount packaging and standard 5V supply operation.

Frequently Asked Questions (FAQ)

Q: Can the AS7C1024B-12JCN replace the AS7C1024B-20JCN in existing designs?

A: Yes. The AS7C1024B-12JCN is a direct substitute with identical memory capacity, organization, interface, package, and voltage specifications. The faster access time (12 ns) is backward compatible with applications designed for 20 ns operation.

Q: What is the primary difference between these two parts?

A: Access time and write cycle time differ. The AS7C1024B-12JCN operates at 12 ns while the AS7C1024B-20JCN operates at 20 ns. All other electrical and mechanical parameters are identical.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 32-BSOJ package with 0.400" (10.16mm) width, ensuring identical PCB footprint and mounting compatibility.

Q: Do both parts require the same supply voltage?

A: Yes. Both parts operate within the 4.5V to 5.5V supply range and are suitable for standard 5V logic systems.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL rating 3 (168 Hours). Compliance status is identical.

Q: Which part should be selected for new designs?

A: Selection depends on application timing requirements. The AS7C1024B-12JCN is suitable when faster access time provides system benefits. The AS7C1024B-20JCN is suitable when timing margins are adequate and cost optimization is prioritized.