AT25SF161B-SHB-B Equivalent & Substitute Parts

Part Overview

The AT25SF161B-SHB-B is a 16Mbit NOR Flash memory IC manufactured by Renesas Electronics Corporation. This Surface Mount device operates as a non-volatile memory component utilizing SPI Quad I/O interface technology. The part is classified as Active product status with full RoHS3 compliance and MSL Level 1 rating. Substitute parts are identified when equivalent memory capacity, interface protocol, package form factor, and electrical operating parameters align with the original specification, enabling direct functional replacement in circuit applications.

Substiute Parts

AT25SF161B-SHB-B

Renesas Electronics CorporationIn Stock: 792AT25SF161B-SHB-B Datasheet

Current PartRFQ

W25Q16JVSSIQ

Winbond ElectronicsIn Stock: 205371W25Q16JVSSIQ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT25SF161B-SHB-B is determined by strict alignment across the following critical parameters:

Memory Capacity & Organization: The substitute part must provide 16Mbit capacity in 2M x 8 organization to maintain data storage equivalence.

Memory Technology: Both the main part and substitute must utilize FLASH - NOR technology to ensure identical read/write operation characteristics.

Interface Protocol: SPI - Quad I/O interface is mandatory for electrical and protocol compatibility with existing circuit designs.

Package Form Factor: The 8-SOIC package with 0.209" (5.30mm) width specification ensures mechanical and thermal compatibility with PCB layouts and solder reflow processes.

Electrical Parameters: Supply voltage range of 2.7V ~ 3.6V and operating temperature range of -40°C ~ 85°C must be met or exceeded by substitute parts.

Compliance Standards: RoHS3 compliance is required to maintain regulatory and environmental standards alignment.

The W25Q16JVSSIQ from Winbond Electronics satisfies all substitution criteria across these parameters.

Parameter Comparison

Engineering Selection Recommendations

AT25SF161B-SHB-B (Renesas Electronics Corporation)

Primary selection criteria: Established Renesas ecosystem integration, MSL Level 1 rating indicating superior moisture tolerance, and verified inventory availability of 714 units. This part maintains Active product status with full RoHS3 compliance and EAR99 export classification.

W25Q16JVSSIQ (Winbond Electronics)

Substitute selection criteria: Functionally equivalent across all critical parameters with enhanced clock frequency specification of 133 MHz versus 108 MHz. Winbond SpiFlash® series designation confirms product maturity. Active product status with RoHS3 compliance and REACH Unaffected designation. Significantly higher inventory availability of 205,300 units supports supply chain continuity. DiGi-Electronics Programmable verification status confirmed for this part.

Both parts maintain identical electrical operating parameters, package form factor, and compliance certifications. Selection between these parts is determined by supply chain requirements, inventory availability, and ecosystem integration preferences rather than functional capability differences.

Frequently Asked Questions (FAQ)

Q: Can the W25Q16JVSSIQ directly replace the AT25SF161B-SHB-B in existing circuit designs?

A: Yes. Both parts share identical memory capacity (16Mbit), memory organization (2M x 8), interface protocol (SPI - Quad I/O), package form factor (8-SOIC), supply voltage range (2.7V ~ 3.6V), and operating temperature range (-40°C ~ 85°C). PCB layout and firmware compatibility are maintained without modification.

Q: What is the significance of the clock frequency difference between these parts?

A: The W25Q16JVSSIQ operates at 133 MHz while the AT25SF161B-SHB-B operates at 108 MHz. The substitute part's higher frequency specification does not create incompatibility; it represents enhanced performance capability. Existing circuit designs operating at 108 MHz will function identically with the substitute part.

Q: Are there moisture sensitivity differences between these parts?

A: Yes. The AT25SF161B-SHB-B carries MSL Level 1 (Unlimited) rating, while the W25Q16JVSSIQ carries MSL Level 3 (168 Hours) rating. MSL Level 1 indicates superior moisture tolerance. Applications requiring extended storage in high-humidity environments prior to reflow soldering should prioritize the Renesas part.

Q: Do both parts meet current regulatory compliance standards?

A: Yes. Both the AT25SF161B-SHB-B and W25Q16JVSSIQ are RoHS3 compliant and carry EAR99 export classification. The W25Q16JVSSIQ additionally carries REACH Unaffected designation.

Q: What packaging format is used for both parts?

A: Both parts utilize 8-SOIC (Small Outline Integrated Circuit) surface mount packaging with 0.209" (5.30mm) width specification. This identical package ensures mechanical compatibility with existing PCB designs and automated assembly processes.

Q: How do write cycle times compare between these parts?

A: The AT25SF161B-SHB-B specifies 50µs word write cycle time and 2.4ms page write cycle time. The W25Q16JVSSIQ specifies 3ms page write cycle time. Both parts support equivalent write operations; timing differences reflect different measurement methodologies between manufacturers.