CHIPNOBO

Semiconductor Replacement Engineering & Supply Continuity

Memory

PRODUCT DATASHEET

ChipNobo MPN

NB25Q40RLSSJM

GLOBAL BRAND CROSS-REFERENCE

Winbond Electronics

SPIFLASH, 4M-BIT, 4KB UNIFORM SE

W25Q40RLSSJM

  • High-reliability design
  • Long-term stable supply
  • RoHS compliant
SPIFLASH, 4M-BIT, 4KB UNIFORM SE

1. PRODUCT POSITIONING

NB25Q40RLSSJM is a product identity corresponding to the reference product W25Q40RLSSJM. This document presents the available product specifications, mechanical/package information and compatibility summary for engineering and procurement reference.

This document is a product information. Compatibility conclusions should be read together with the applicable Cross-Reference Identification (CID) rule, package/pin verification and engineering review record.

2. TECHNICAL SPECIFICATION COMPARISON (core parameters)
Parameter Winbond Electronics W25Q40RLSSJM ChipNobo NB25Q40RLSSJM Match
Part Status Active Active ✓
Mounting Type Surface Mount Surface Mount ✓
Supplier Device Package 8-SOIC 8-SOIC ✓
Memory Type Non-Volatile Non-Volatile ✓
Package / Case 8-SOIC (0.209", 5.30mm Width) 8-SOIC (0.209", 5.30mm Width) ✓
Memory Size 4Mbit 4Mbit ✓
Memory Organization 512K x 8 512K x 8 ✓
Write Cycle Time - Word, Page 2ms 2ms ✓
Operating Temperature -40°C ~ 105°C (TA) -40°C ~ 105°C (TA) ✓
Voltage - Supply 2.3V ~ 3.6V 2.3V ~ 3.6V ✓
Memory Format FLASH FLASH ✓
Access Time 4.5 ns 4.5 ns ✓
Clock Frequency 133 MHz 133 MHz ✓
Memory Interface SPI - Quad I/O, QPI SPI - Quad I/O, QPI ✓
Technology FLASH - NOR (SLC) FLASH - NOR (SLC) ✓
RoHS Status ROHS3 Compliant ROHS3 Compliant ✓
Moisture Sensitivity Level (MSL) 3 (168 Hours) 3 (168 Hours) ✓

CHIPNOBO

Semiconductor Replacement Engineering & Supply Continuity

Memory

PRODUCT DATASHEET

3. SUPPLY & LIFECYCLE
ChipNobo Number NB25Q40RLSSJM
Lifecycle status Active
NRND No
EOL No
PCN monitor No
Last buy date No Deadline
Alternate availability Sufficient
4. APPLICATION AREAS
AI Server GPU Server
AI Accelerator Server Data Center Switch
Laptop Notebook Smartphone
ADAS Camera System Smart Cockpit
5G Base Station Industrial Computer
Semiconductor Equipment Medical Imaging Equipment

5. ENGINEERING & COMMERCIAL NOTES

  • The ChipNobo MPN is the public product identity used by ChipNobo for this replacement reference.
  • The original manufacturer and original MPN are retained as reference identity information.
  • Product PDF data are intended for engineering, procurement and supply-continuity reference.
  • Current price, MOQ, lead time, available supply source and regional availability should be confirmed through RFQ.
  • For customer-specific qualification, PCB footprint approval, reliability requirements or design-in approval, the customer should perform the applicable validation process.

CHIPNOBO REPLACEMENT · Semiconductor Replacement Engineering & Supply Continuity Partner

Document purpose: Product Information / Replacement Reference · Generated from the product data supplied for NB25Q40RLSSJM.

Important Notice & Disclaimer

Document ID: 【CN-DATA-NB25Q40RLSSJM】 Revision: 1.0 Status: Released

The information provided by ChipNobo is intended solely for engineering evaluation, product selection, procurement, and supply continuity reference purposes. Product specifications, lifecycle status, availability, and other information are subject to change without notice. Customers should always verify relevant information against the latest official documentation published by the respective manufacturers.

Cross-reference and replacement recommendations are provided for engineering reference purposes only. They do not constitute a guarantee of pin-to-pin compatibility, interchangeability, or suitability for any particular application. Customers are responsible for conducting all necessary engineering reviews, testing, and qualification prior to product selection and use.

Manufacturer names, trademarks, and part numbers are referenced solely for product identification purposes. Their use does not imply any affiliation with, endorsement by, or authorization from the respective manufacturers, unless expressly stated otherwise.

To the maximum extent permitted by applicable law, ChipNobo makes no warranties, express or implied, regarding the completeness, accuracy, or suitability of the information provided and shall not be liable for any loss or damage arising from its use or reliance, except as otherwise expressly agreed in writing and subject to applicable law.