IS25WQ080-JBLE Equivalent & Substitute Parts

Part Overview

The IS25WQ080-JBLE is a 8Mbit NOR Flash memory IC manufactured by ISSI (Integrated Silicon Solution Inc). This Surface Mount device operates via SPI interface at 104 MHz and is designed for non-volatile data storage applications requiring compact form factors. The part is currently Active in product status with 718 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit designs.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile FLASH
Memory Size	8Mbit
Memory Organization	1M x 8
Memory Interface	SPI
Clock Frequency	104 MHz
Voltage Supply Range	1.65V ~ 1.95V
Operating Temperature	-40°C ~ 105°C
Package Type	8-SOIC (0.209", 5.30mm Width)
Write Cycle Time	700µs
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the IS25WQ080-JBLE is determined by the following critical parameters:

Memory Capacity: 8Mbit (1M x 8 organization)
Interface Protocol: SPI-compatible (standard SPI or extended modes such as Quad I/O are acceptable as they maintain backward compatibility)
Package Footprint: 8-SOIC with identical 0.209" (5.30mm) width
Supply Voltage Range: 1.65V ~ 1.95V (substitute must operate within or encompass this range)
Clock Frequency: 104 MHz minimum
Compliance: RoHS3 and REACH status alignment

The W25Q80EWSSIG qualifies as a direct substitute because it matches all critical parameters while offering extended interface capabilities (Quad I/O mode) that remain backward compatible with standard SPI operation.

Parameter Comparison

Parameter	IS25WQ080-JBLE (Main)	W25Q80EWSSIG (Substitute)	Compatibility
Manufacturer	ISSI	Winbond Electronics	Different manufacturer, same category
Memory Size	8Mbit	8Mbit	Identical
Memory Organization	1M x 8	1M x 8	Identical
Memory Interface	SPI	SPI - Quad I/O, QPI	Compatible (Quad I/O is superset of SPI)
Clock Frequency	104 MHz	104 MHz	Identical
Voltage Supply	1.65V ~ 1.95V	1.65V ~ 1.95V	Identical
Operating Temperature	-40°C ~ 105°C	-40°C ~ 85°C	Substitute range is narrower (85°C vs 105°C max)
Package Type	8-SOIC (0.209", 5.30mm)	8-SOIC (0.209", 5.30mm)	Identical
Write Cycle Time	700µs	3ms	Substitute is slower
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL Rating	3 (168 Hours)	3 (168 Hours)	Identical
Product Status	Active	Active	Both actively manufactured

Engineering Selection Recommendations

Both the IS25WQ080-JBLE and W25Q80EWSSIG are Active products with ROHS3 compliance and identical MSL ratings, making either suitable for new designs. Selection between them should account for the following provided specifications:

Operating Temperature Range: The IS25WQ080-JBLE supports -40°C to 105°C, while the W25Q80EWSSIG supports -40°C to 85°C. Applications requiring operation above 85°C must use the ISSI part.
Write Performance: The IS25WQ080-JBLE offers 700µs write cycle time versus 3ms for the Winbond part. Time-critical write operations favor the ISSI device.
Interface Flexibility: The W25Q80EWSSIG provides Quad I/O and QPI modes in addition to standard SPI, offering design flexibility for future bandwidth requirements while maintaining backward compatibility.
Availability: The W25Q80EWSSIG has significantly higher inventory (24,300 units) compared to the IS25WQ080-JBLE (718 units).

Frequently Asked Questions (FAQ)

Q: Can the W25Q80EWSSIG replace the IS25WQ080-JBLE in existing designs?

A: Yes, for applications operating within -40°C to 85°C. The identical package footprint (8-SOIC), supply voltage range (1.65V ~ 1.95V), memory capacity (8Mbit), and clock frequency (104 MHz) ensure mechanical and electrical compatibility. The Quad I/O interface is backward compatible with standard SPI operation.

Q: What is the impact of the different write cycle times?

A: The IS25WQ080-JBLE writes at 700µs per page, while the W25Q80EWSSIG requires 3ms. For applications with frequent write operations or strict timing requirements, the ISSI part provides faster performance. For read-dominant applications, this difference is negligible.

Q: Are there temperature limitations when substituting?

A: Yes. The IS25WQ080-JBLE operates to 105°C maximum, while the W25Q80EWSSIG is rated to 85°C. If your application requires operation above 85°C, the ISSI part is required. Both parts operate identically across the -40°C to 85°C overlap range.

Q: Do the different interface capabilities affect compatibility?

A: No. The W25Q80EWSSIG's Quad I/O and QPI modes are extensions to the standard SPI protocol. Existing SPI firmware and hardware designs operate without modification. The substitute part defaults to standard SPI mode when not explicitly configured for Quad I/O operation.

Q: Are both parts suitable for new production designs?

A: Yes. Both the IS25WQ080-JBLE and W25Q80EWSSIG are Active products with ROHS3 compliance and identical moisture sensitivity ratings (MSL 3, 168 hours). Either part is appropriate for new designs, with selection based on temperature range, write performance, and availability requirements.

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