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Winbond Electronics Corporation W25Q20CLSNIG
- Part No.:
- W25Q20CLSNIG
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25Q20CLSNIG.pdf
- Description:
- IC FLASH 2MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,350
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Product details
Overview
W25Q20CLSNIG from Winbond is a 2M-bit (256KB) serial NOR flash memory IC supporting Standard, Dual, and Quad SPI interfaces with 4KB uniform sectors, 104MHz max clock, and XIP-capable continuous read mode. It operates from 2.3V to 3.6V, draws 1mA active / <1µA power-down current, and targets embedded code storage, firmware boot, and parameter logging in space-constrained MCU systems.
For engineers reviewing the W25Q20CLSNIG datasheet, W25Q20CLSNIG pinout, W25Q20CLSNIG application, or W25Q20CLSNIG equivalent, key selection considerations include Quad SPI enable (QE bit), /WP and /HOLD dual-function behavior in Quad mode, 4KB sector granularity for fine-grained data updates, and JEDEC-compliant 64-bit unique ID for device authentication.
Technical Context
The W25Q20CLSNIG implements a SPI-compatible command set with three operational modes: Standard (DI/DO), Dual (IO0/IO1), and Quad (IO0–IO3), where IO2 and IO3 are remapped from /WP and /HOLD only when the non-volatile Quad Enable (QE) bit in Status Register-2 is set. Its architecture supports true execute-in-place (XIP) via Continuous Read Mode with ≤8-clock instruction overhead per 24-bit address.
Write protection combines hardware (/WP pin active-low control of Status Register writes) and software (BP2–BP0, TB, SEC, CMP bits in Status Register-1), enabling configurable top/bottom/complement protection of 4KB sectors or 64KB blocks. Erase/program suspend/resume, >100,000 endurance cycles, and >20-year data retention are confirmed features.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 M-bit (256 KB), organized as 1,024 × 256-byte pages |
| Interface Support | Standard/Dual/Quad SPI; requires QE=1 for Quad I/O (IO2/IO3 enabled) |
| Max Clock Frequency | 104 MHz; enables 208 Mbps (Dual) or 416 Mbps (Quad) effective throughput |
| Erase Granularity | Uniform 4KB sectors, plus 32KB and 64KB blocks - enables flexible firmware/data partitioning |
| Operating Voltage | 2.3 V to 3.6 V - compatible with 2.5V, 3.0V, and 3.3V logic domains |
| Endurance & Retention | >100,000 program/erase cycles; >20 years data retention at +85°C |
| Temperature Range | −40°C to +85°C - qualified for industrial-grade embedded applications |
Pinout & Package
W25Q20CLSNIG uses an 8-pin SOIC 150-mil package (package code SN), with gull-wing leads and standard JEDEC footprint. Pin 1 is marked by a beveled corner or dot; pin numbering follows counter-clockwise convention from pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| /CS | Chip Select Input | Active-low enable; high-impedance DO and standby current when high |
| DO (IO1) | Data Output / Bidirectional I/O | Unidirectional output in Standard SPI; becomes IO1 in Dual/Quad mode |
| /WP (IO2) | Write Protect Input / Bidirectional I/O | Hardware lock for Status Register writes; remapped to IO2 when QE=1 |
| GND | Ground Reference | Primary return path for VCC and all I/O signals; must be low-impedance |
| DI (IO0) | Data Input / Bidirectional I/O | Unidirectional input in Standard SPI; becomes IO0 in Dual/Quad mode |
| CLK | Serial Clock Input | Edge-triggered timing source; supports SPI Modes 0 and 3 |
| /HOLD (IO3) | Hold Input / Bidirectional I/O | Pauses ongoing SPI transfer; remapped to IO3 when QE=1 |
| VCC | Power Supply | 2.3–3.6 V supply; decoupling capacitor required within 1 cm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Continuous Read Mode | Enables true XIP with ≤8-clock instruction overhead per 24-bit address, reducing CPU wait states |
| Quad SPI Enable (QE) | Non-volatile bit in Status Register-2; enables 4-wire I/O (IO0–IO3) and 416 Mbps throughput |
| Flexible Protection Scheme | Combines /WP pin, SRP0/SRP1, and BP2–BP0/TB/SEC/CMP bits for hardware+software sector-level lockdown |
| Unique 64-bit ID | JEDEC-compliant serial number readable via 4Bh instruction - supports secure device identity and firmware binding |
| Erase/Program Suspend | 75h/7Ah instructions allow pausing long operations (e.g., 64KB erase) to service interrupts without data loss |
Applications
| Firmware Boot Storage | IoT Edge Device Configuration |
|---|---|
Use Scenario: Storing bootloader and application firmware for ARM Cortex-M microcontrollers in smart sensors. IC Role / Device Role / Timing Role: Non-volatile code storage with XIP support via Quad SPI, enabling fast cold-boot execution without RAM copy. Use Value: Reduces boot time by 40% vs. Standard SPI; 4KB sectors allow atomic firmware patching without erasing full image. | Use Scenario: Holding calibrated sensor offsets, network credentials, and OTA update metadata in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Parameter storage with hardware write protection (/WP pin tied low) and sector-level locking via BP bits. Use Value: Prevents accidental overwrites during brown-out; 256-byte page programming enables low-energy config updates. |
| Industrial HMI Display Cache | Medical Diagnostic Instrument Log Buffer |
Use Scenario: Caching GUI assets (fonts, icons, bitmaps) for ARM-based human-machine interface panels. IC Role / Device Role / Timing Role: High-throughput asset delivery using Fast Read Quad I/O (EBh) at 104MHz clock. Use Value: Delivers >30 MB/s effective bandwidth - sufficient for real-time UI rendering without frame stutter. | Use Scenario: Recording timestamped diagnostic measurements (ECG waveforms, pressure curves) in portable analyzers. IC Role / Device Role / Timing Role: Reliable cyclic buffer storage with >100K endurance and 20-year data retention at +85°C. Use Value: Eliminates need for wear-leveling firmware; 4KB sectors align with clinical data packet size for deterministic overwrite. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NOR flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX25L2006EM1I-12G | 2M-bit, 104MHz max, SOIC-8; supports Dual/Quad SPI but lacks Continuous Read Mode and 64-bit UID | No XIP optimization; no unique ID for secure boot binding | Preferred when cost sensitivity outweighs XIP performance and device authentication needs |
| AT25SF021-SSHD-B | 2M-bit, 104MHz, SOIC-8; includes Secure Flash features (hardware crypto engine), but no Quad I/O remapping of /WP and /HOLD | Hardware AES encryption support; different pin function mapping in Quad mode | Chosen when cryptographic integrity of stored firmware is mandatory, not just speed or density |
Compared with MX25L2006EM1I-12G and AT25SF021-SSHD-B, the W25Q20CLSNIG uniquely balances Quad SPI throughput, XIP-optimized Continuous Read Mode, and JEDEC-standard 64-bit UID - making it optimal for cost-sensitive, high-reliability embedded systems requiring both performance and traceability.
Availability
W25Q20CLSNIG is available at Aetrix Electronics and suitable for firmware boot storage, IoT edge configuration, and industrial HMI display cache requiring stable component supply, long-term lifecycle assurance, and industrial temperature compliance.
Supply support for W25Q20CLSNIG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Winbond Electronics is a Taiwan-based semiconductor company specializing in specialty memory solutions, including NOR/NAND flash, RAM, and mobile DRAM, serving automotive, industrial, and consumer markets since 1987.
The W25Q series is designed for embedded systems requiring high-speed, low-power, and secure serial flash - emphasizing XIP capability, flexible protection, and JEDEC-compliant interoperability across microcontroller platforms.
FAQ
What is the maximum SPI clock frequency supported by the W25Q20CLSNIG?
The W25Q20CLSNIG supports up to 104 MHz SPI clock frequency in Standard, Dual, and Quad SPI modes. At this rate, effective data throughput reaches 208 Mbps in Dual I/O mode and 416 Mbps in Quad I/O mode when using Fast Read Dual I/O (BBh) or Fast Read Quad I/O (EBh) instructions. This is confirmed in Section 9.6 of the datasheet under AC Electrical Characteristics.
Does the W25Q20CLSNIG support execute-in-place (XIP) operation?
Yes, the W25Q20CLSNIG supports true XIP via its Continuous Read Mode, which reduces instruction overhead to as few as 8 clock cycles per 24-bit address access. This enables direct code execution from flash without copying to RAM, verified in Section 1 (General Description) and Section 7.1.4 of the datasheet.
How does the /WP pin behave when Quad SPI mode is enabled on the W25Q20CLSNIG?
When the Quad Enable (QE) bit in Status Register-2 is set to 1, the /WP pin on the W25Q20CLSNIG is remapped as IO2 (bidirectional data line) and loses its hardware write-protect function. This behavior is explicitly documented in Sections 5.3 and 7.1.3 of the datasheet and applies only in Quad SPI mode.
What is the endurance and data retention specification for the W25Q20CLSNIG?
The W25Q20CLSNIG guarantees more than 100,000 program/erase cycles and greater than 20 years of data retention at +85°C ambient temperature. These values are specified in Section 2 (Features) and validated across the full industrial temperature range (−40°C to +85°C).
Is the W25Q20CLSNIG pin-compatible with other members of the W25QxxCL family?
Yes, the W25Q20CLSNIG shares identical pinout, package dimensions, and electrical interface with other W25QxxCL variants in SOIC-8 (SN) packaging, including W25Q40CL, W25Q80CL, and W25Q16CL. All support the same instruction set, register map, and Quad SPI remapping logic - enabling scalable memory upgrades without PCB changes.
W25Q20CLSNIG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- 800µs
- Access Time:
- -
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
W25Q20CLSNIG FAQ
1.How can I place an order for W25Q20CLSNIG through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q20CLSNIG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for W25Q20CLSNIG reliable?
The price and inventory of W25Q20CLSNIG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q20CLSNIG is usually 5 days.
3.What payment methods are accepted for W25Q20CLSNIG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q20CLSNIG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q20CLSNIG?
W25Q20CLSNIG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q20CLSNIG order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for W25Q20CLSNIG?
For technical support, including W25Q20CLSNIG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q20CLSNIG requirements.
6.How does Aetrix verify that W25Q20CLSNIG is sourced from the original manufacturer or authorized distributors?
All W25Q20CLSNIG products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that W25Q20CLSNIG meets industry standards.
7.What is the process for return or replacement of W25Q20CLSNIG?
All W25Q20CLSNIG units undergo pre-shipment inspection (PSI). If there is an issue with W25Q20CLSNIG, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The W25Q20CLSNIG part is unused and in its original packaging.
Return procedure for W25Q20CLSNIG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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