CY62148BLL-70SC Equivalent & Substitute Parts

Part Overview

The CY62148BLL-70SC is a 4Mbit asynchronous SRAM manufactured by Infineon Technologies, organized as 512K x 8 with parallel interface and 70 ns access time. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support. The part operates within the 4.5V to 5.5V supply range and is packaged in 32-SOIC surface mount configuration.

Substiute Parts

CY62148BLL-70SC

Infineon TechnologiesIn Stock: 1457CY62148BLL-70SC Datasheet

Current PartRFQ

IS62C5128EL-45QLI

ISSI, Integrated Silicon Solution IncIn Stock: 686IS62C5128EL-45QLI Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CY62148BLL-70SC is determined by the following critical parameters:

• Memory capacity (4Mbit) and organization (512K x 8) must match exactly
• Memory type must be volatile SRAM with asynchronous parallel interface
• Voltage supply range must be compatible with 4.5V ~ 5.5V operation
• Package must be 32-SOIC form factor to ensure PCB compatibility
• Access time must be equal to or faster than 70 ns (lower values are acceptable)

The IS62C5128EL-45QLI meets all substitution criteria. It provides identical memory capacity, organization, interface type, and package configuration. The 45 ns access time is faster than the original 70 ns specification, making it functionally compatible for timing-critical applications.

Parameter Comparison

Engineering Selection Recommendations

The IS62C5128EL-45QLI is a direct functional substitute for the CY62148BLL-70SC based on electrical and mechanical parameter alignment. The substitute offers performance advantages: faster 45 ns access time and extended operating temperature range (-40°C to 85°C versus 0°C to 70°C). The IS62C5128EL-45QLI carries ROHS3 compliance status, whereas the original part is non-compliant, making the substitute preferable for applications subject to environmental regulations.

Pin-to-pin compatibility and identical package footprint (32-SOIC) enable direct PCB replacement without layout modifications. The substitute's active product status ensures long-term availability compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the IS62C5128EL-45QLI replace the CY62148BLL-70SC in existing designs?

A: Yes. Both parts share identical memory capacity (4Mbit), organization (512K x 8), parallel interface, supply voltage range (4.5V ~ 5.5V), and 32-SOIC package configuration. The substitute's faster access time (45 ns) is backward compatible with designs specified for 70 ns operation.

Q: Are there pin compatibility concerns?

A: No. Both parts use the 32-SOIC package with identical pinout for parallel SRAM interface signals. Direct PCB substitution is possible without schematic or layout changes.

Q: What is the temperature operating range difference?

A: The CY62148BLL-70SC operates from 0°C to 70°C. The IS62C5128EL-45QLI extends this to -40°C to 85°C, providing wider environmental tolerance suitable for industrial and automotive applications.

Q: Does the substitute meet modern compliance requirements?

A: The IS62C5128EL-45QLI is ROHS3 compliant, whereas the original CY62148BLL-70SC is non-compliant. For applications requiring environmental compliance certification, the substitute is the appropriate choice.

Q: Is the faster access time of the substitute a concern?

A: No. Faster access time (45 ns versus 70 ns) improves system performance and is fully compatible with designs specified for the original 70 ns part. No timing violations occur when substituting with a faster device.