IS62WV5128DBLL-45QLI-TR Equivalent & Substitute Parts

Part Overview

The IS62WV5128DBLL-45QLI-TR is a 4Mbit asynchronous SRAM (Static Random Access Memory) IC manufactured by ISSI (Integrated Silicon Solution Inc). This parallel interface memory device is designed for applications requiring volatile storage with 45 ns access time and operates across a 2.3V to 3.6V supply voltage range. The component is packaged in a 32-SOIC surface mount configuration with 512K x 8 memory organization.

This part is currently discontinued at DiGi Electronics. Locating functionally equivalent alternatives is necessary for ongoing production support, design revisions, and inventory replenishment where the original part is no longer available through standard distribution channels.

Key Parameters

Parameter	Value
Memory Size	4Mbit
Memory Organization	512K x 8
Memory Format	SRAM
Technology	SRAM - Asynchronous
Memory Interface	Parallel
Access Time	45 ns
Write Cycle Time	45 ns
Voltage Supply Range	2.3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package Type	32-SOIC (0.445", 11.30mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the IS62WV5128DBLL-45QLI-TR is determined by strict alignment across the following critical parameters:

Memory capacity and organization (4Mbit, 512K x 8 configuration) must remain identical to ensure address and data bus compatibility. The asynchronous SRAM technology and parallel interface are non-negotiable functional requirements. Access time and write cycle time specifications (45 ns) establish the performance baseline; substitutes must meet or exceed this timing requirement. Supply voltage range compatibility is essential; the substitute must operate within the original part's voltage envelope or provide a compatible subset. Package type (32-SOIC) and mounting method (surface mount) must match for PCB layout compatibility. Environmental ratings (operating temperature -40°C to 85°C) and compliance certifications (ROHS3, MSL 3) must be maintained.

The IS62WV5128EBLL-45QLI-TR qualifies as a direct substitute based on identical memory specifications, matching package configuration, equivalent performance characteristics, and maintained compliance standards.

Parameter Comparison

Parameter	IS62WV5128DBLL-45QLI-TR (Main Part)	IS62WV5128EBLL-45QLI-TR (Substitute)
Manufacturer	ISSI	ISSI
Memory Size	4Mbit	4Mbit
Memory Organization	512K x 8	512K x 8
Memory Format	SRAM	SRAM
Technology	SRAM - Asynchronous	SRAM - Asynchronous
Memory Interface	Parallel	Parallel
Access Time	45 ns	45 ns
Write Cycle Time	45 ns	45 ns
Voltage Supply Range	2.3V ~ 3.6V	2.2V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	32-SOIC (0.445", 11.30mm Width)	32-SOIC (0.445", 11.30mm Width)
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)
Product Status	Discontinued at DiGi Electronics	Active
Packaging Option	Not specified	Tape & Reel (TR)

Engineering Selection Recommendations

The IS62WV5128EBLL-45QLI-TR is the qualified substitute for the discontinued IS62WV5128DBLL-45QLI-TR. Both parts share identical core memory specifications, performance characteristics, and physical packaging. The substitute maintains active product status with confirmed inventory availability (1173 pcs), ensuring supply chain continuity.

The substitute part exhibits a marginally lower minimum supply voltage specification (2.2V versus 2.3V), which expands operational flexibility without compromising the upper voltage limit. This represents an enhancement rather than a limitation for most applications operating within standard voltage ranges.

Both parts maintain equivalent ROHS3 compliance and MSL 3 moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage protocols. The substitute is available in Tape & Reel packaging, which is standard for high-volume production environments.

Frequently Asked Questions (FAQ)

Q: Can the IS62WV5128EBLL-45QLI-TR be used as a direct replacement for the IS62WV5128DBLL-45QLI-TR?

A: Yes. Both parts are manufactured by ISSI with identical 4Mbit capacity, 512K x 8 organization, 45 ns access time, and 32-SOIC packaging. No circuit modifications or PCB layout changes are required.

Q: What is the difference between these two part numbers?

A: The primary difference is product status. The DBLL variant is discontinued, while the EBLL variant remains in active production. The EBLL variant also specifies a minimum supply voltage of 2.2V compared to 2.3V for the DBLL variant, providing broader voltage compatibility.

Q: Are the pin configurations identical?

A: Yes. Both parts use the 32-SOIC package with identical pinout, ensuring direct PCB compatibility without rework.

Q: What is the significance of the voltage range difference (2.3V vs 2.2V minimum)?

A: The substitute part's lower minimum voltage specification (2.2V) allows operation in applications with tighter voltage tolerances. This does not affect applications designed for the original 2.3V minimum specification.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain ROHS3 compliance and MSL 3 (168 Hours) moisture sensitivity ratings. Environmental operating temperature ranges are identical at -40°C to 85°C.

Q: Is the Tape & Reel packaging compatible with standard pick-and-place equipment?

A: Yes. Tape & Reel (TR) packaging is the standard format for automated assembly processes and is compatible with all conventional surface mount equipment.

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