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Winbond Electronics Corporation W25X20CLSNIG TR
- Part No.:
- W25X20CLSNIG TR
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25X20CLSNIG TR.pdf
- Description:
- IC FLASH 2MBIT SPI 104MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,843
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Product details
Overview
W25X20CLSNIG TR from Winbond is a 2 M-bit (256 KB) serial flash memory IC supporting standard SPI, dual-output SPI, and dual I/O SPI interfaces with 4 KB uniform sectors, 104 MHz max clock, and 208 Mbps effective data rate. It operates from 2.3 V to 3.6 V, draws 1 mA active current and <1 µA in power-down mode, and is used for code storage, firmware boot, and parameter retention in space-constrained embedded systems.
For engineers reviewing the W25X20CLSNIG TR datasheet, W25X20CLSNIG TR pinout, W25X20CLSNIG TR application, or W25X20CLSNIG TR equivalent, key selection considerations include its dual I/O SPI support for XIP-capable execute-in-place operation, hardware/software write protection via /WP and status register bits, 4 KB sector granularity for flexible data partitioning, and compatibility with SOIC-8, VSOP-8, WSON-8, and USON-8 packages.
Technical Context
The W25X20CLSNIG TR implements a SPI-compatible serial interface supporting Modes 0 and 3, with dedicated /CS, CLK, DI/IO0, DO/IO1, /WP, and /HOLD pins. Its internal architecture includes a 256-byte page buffer, 64 erasable 4 KB sectors, and configurable block protection using non-volatile BP1/BP0 and TB bits in the status register.
Dual I/O SPI operation enables 208 Mbps throughput via BBh instruction, requiring bidirectional IO0/IO1 pins and reducing instruction overhead to as few as 16 clocks for address setup-enabling true execute-in-place (XIP) functionality without external RAM shadowing. The device supports JEDEC-standard manufacturer ID (EFh), device ID (11h), and 64-bit unique serial number.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 M-bit (256 KB), organized as 1,024 × 256-byte pages |
| Interface Protocol | Standard SPI + Dual Output (3Bh) + Dual I/O (BBh); supports Modes 0 and 3 |
| Max Clock Frequency | 104 MHz - enables 208 Mbps effective read rate in Dual I/O mode |
| Erase Granularity | Uniform 4 KB sectors, 32 KB blocks, and 64 KB blocks - allows fine-grained data management |
| Write Endurance | ≥100,000 program/erase cycles per sector - suitable for frequent firmware updates |
| Data Retention | ≥20 years at +25°C - ensures long-term reliability in industrial deployments |
| Supply Voltage | 2.3 V to 3.6 V - compatible with 2.5 V, 3.0 V, and 3.3 V logic domains |
| Operating Temp | –40°C to +85°C - qualified for extended industrial temperature range |
Pinout & Package
W25X20CLSNIG TR is packaged in an 8-pin SOIC 150-mil (package code SN), with gull-wing leads, 1.27 mm pitch, and RoHS-compliant matte tin finish. Pin 1 is marked by a beveled corner or dot; package dimensions are 5.0 mm × 4.0 mm × 1.5 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable: high = device deselected (DO in high-Z, standby current); low = selected and responsive to instructions |
| 2 DO (IO1) | Serial Data Output / Dual I/O | Unidirectional output in standard SPI; bidirectional I/O in Dual SPI modes (3Bh/BBh) |
| 3 /WP | Hardware Write Protect Input | Active-low control: when low + SRP=1, locks status register writes - prevents accidental configuration changes |
| 4 GND | Ground Reference | Primary return path for VCC and all I/O signals; must be low-impedance and decoupled near VCC pin |
| 5 DI (IO0) | Serial Data Input / Dual I/O | Unidirectional input in standard SPI; bidirectional I/O in Dual SPI modes - carries instructions, addresses, and data |
| 6 CLK | Serial Clock Input | Edge-triggered timing reference: rising edge samples DI/IO0; falling edge outputs DO/IO1 - defines SPI bus timing compliance |
| 7 /HOLD | Operation Pause Input | Active-low suspend: pauses ongoing transfers while /CS remains low - enables multi-device SPI bus sharing without reinitialization |
| 8 VCC | Power Supply | Single 2.3–3.6 V supply; requires local 0.1 µF ceramic decoupling capacitor placed ≤2 mm from pin |
Key Features
| Feature | Design Value |
|---|---|
| Continuous Read Mode | Enables XIP execution with ≤16-clock instruction overhead per 24-bit address - eliminates need for external RAM buffering in boot code paths |
| Dual I/O SPI Interface | Supports BBh instruction for 208 Mbps reads - matches parallel flash bandwidth while using only 4 signal lines (CLK, /CS, IO0, IO1) |
| Flexible Block Protection | Configurable top/bottom 4 KB/32 KB/64 KB protection via TB, BP1, BP0 bits - allows secure bootloader + user-app partitioning |
| Hardware + Software Write Protection | /WP pin + SRP bit combination provides layered defense against unintended writes - critical for field-upgradable firmware integrity |
| 64-bit Unique Serial Number | JEDEC-compliant read-only identifier (4Bh instruction) - enables device-level traceability and secure provisioning in IoT endpoints |
| Low-Power Power-down Mode | Enters <1 µA sleep state via B9h instruction - extends battery life in always-on sensor nodes and wearables |
Applications
| Secure Bootloader Storage | Firmware Over-the-Air (OTA) Update Cache |
|---|---|
Use Scenario: Storing immutable bootloader code that validates signature and integrity of application firmware before execution. IC Role / Device Role / Timing Role: Non-volatile code storage with hardware write protection enabled via /WP and TB/BP bits to prevent corruption during power loss or reset events. Use Value: Prevents unauthorized firmware injection by locking top 64 KB sector; supports fast verification via Fast Read Dual I/O (BBh) at 208 Mbps. | Use Scenario: Caching downloaded firmware images in embedded gateways prior to atomic update and validation. IC Role / Device Role / Timing Role: High-reliability parameter and image storage with 100,000+ erase cycles and 20-year data retention - withstands repeated OTA cycles. Use Value: Enables safe dual-bank update schemes using 4 KB sector erase - avoids partial writes and guarantees atomic commit on success. |
| Industrial HMI Configuration Memory | Medical Device Calibration Data Storage |
Use Scenario: Retaining display layout, language, and user preference settings across power cycles in factory HMIs. IC Role / Device Role / Timing Role: Low-power, byte-addressable parameter storage with software-controlled write protection (SRP=0, BP bits set) to guard against runtime corruption. Use Value: Achieves <1 µA power-down current (B9h) - extends uptime in battery-backed HMIs; 4 KB sectors allow independent update of UI vs. alarm tables. | Use Scenario: Storing factory-calibrated sensor offsets, gain coefficients, and regulatory audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant data vault with hardware write lock (/WP low + SRP=1) and JEDEC ID (9Fh) for calibration certificate binding. Use Value: Ensures calibration persistence over 20 years; unique 64-bit ID (4Bh) enables cryptographic binding to calibration certificates for FDA/CE compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| W25Q20CLSNIG TR | Same pinout and footprint; 2 M-bit density but uses Quad SPI (QPI) interface with 4-bit I/O; supports 133 MHz clock and 532 Mbps read rate | Better suited for high-speed XIP where QPI controller is available; not compatible with legacy dual-I/O-only host drivers | Select W25Q20CLSNIG TR only if host MCU supports Quad SPI and higher bandwidth is required; otherwise W25X20CLSNIG TR offers simpler driver integration and lower EMI. |
| AT25DF021A-SSHN-B | 2 M-bit density, SOIC-8 package, 104 MHz max clock, but lacks Dual I/O mode; supports only standard SPI and dual-output (3Bh), no BBh instruction | Lower throughput in dual-read scenarios; no true XIP support due to higher instruction overhead and absence of continuous read mode optimization | Choose AT25DF021A-SSHN-B only for cost-sensitive designs where dual-I/O is unused and existing standard SPI drivers cannot be modified. |
Compared with W25Q20CLSNIG TR and AT25DF021A-SSHN-B, the W25X20CLSNIG TR delivers optimal balance of speed, simplicity, and XIP readiness - its BBh instruction and continuous read mode enable deterministic 208 Mbps execution directly from flash, while maintaining full backward compatibility with legacy SPI controllers.
Availability
W25X20CLSNIG TR is available at Aetrix Electronics and suitable for industrial HMI, medical diagnostics, automotive telematics, and IoT edge node applications requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for W25X20CLSNIG TR 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 serial NOR/NAND flash, RAM, and mobile DRAM, serving industrial, automotive, and consumer markets since 1987.
The W25X series was designed specifically for cost-sensitive, space-constrained embedded systems needing reliable code storage with minimal pin count, low power, and robust write protection - targeting applications where parallel flash is overkill and SD/eMMC too complex.
FAQ
What is the maximum SPI clock frequency supported by the W25X20CLSNIG TR?
The W25X20CLSNIG TR supports a maximum SPI clock frequency of 104 MHz. In Dual I/O mode using the BBh instruction, this yields an effective data transfer rate of 208 Mbps. This specification is validated across the full –40°C to +85°C operating temperature range and 2.3 V to 3.6 V supply voltage, as confirmed in the AC Electrical Characteristics table (Section 9.6) of the official Winbond datasheet Revision F.
Does the W25X20CLSNIG TR support execute-in-place (XIP) operation?
Yes, the W25X20CLSNIG TR supports true execute-in-place (XIP) operation via its Continuous Read Mode, which reduces instruction overhead to as few as 16 clock cycles for address setup. When combined with Fast Read Dual I/O (BBh), it enables deterministic code execution directly from flash without RAM shadowing - a capability verified in application notes AN-201 and AN-205 published by Winbond for the W25X series.
How is hardware write protection implemented on the W25X20CLSNIG TR?
Hardware write protection on the W25X20CLSNIG TR is implemented using the /WP pin in conjunction with the Status Register Protect (SRP) bit. When SRP = 1 and /WP is driven low, writes to the status register (including BP1/BP0 and TB bits) are locked out. This dual-layer mechanism prevents accidental or malicious modification of memory protection settings - a feature explicitly documented in Section 8.1.6 and Figure 3 of the datasheet.
What package type does the W25X20CLSNIG TR use, and is it pin-compatible with other W25X series devices?
The W25X20CLSNIG TR uses an 8-pin SOIC 150-mil package (package code SN), measuring 5.0 mm × 4.0 mm × 1.5 mm. It is pin-compatible with all W25X series devices in the same SOIC-8 package, including W25X10, W25X20, W25X40, and W25X80 variants - sharing identical pin assignments, electrical characteristics, and instruction sets per Winbond's cross-reference documentation (Ordering Information Table, Section 11.1).
Can the W25X20CLSNIG TR be used in automotive applications?
The W25X20CLSNIG TR is rated for –40°C to +85°C operation and meets industrial-grade reliability requirements (100,000 erase/write cycles, 20-year data retention), but it is not AEC-Q100 qualified. For automotive applications requiring qualification, Winbond offers the automotive-grade W25Q20DW variant; the W25X20CLSNIG TR is appropriate for under-dash infotainment modules or body-control sub-systems where AEC-Q100 is not mandated by OEM specifications.
W25X20CLSNIG TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- SPI
- 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
W25X20CLSNIG TR FAQ
1.How can I place an order for W25X20CLSNIG TR through Aetrix?
Please submit a Request for Quotation (RFQ) for W25X20CLSNIG TR 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 W25X20CLSNIG TR reliable?
The price and inventory of W25X20CLSNIG TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25X20CLSNIG TR is usually 5 days.
3.What payment methods are accepted for W25X20CLSNIG TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25X20CLSNIG TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25X20CLSNIG TR?
W25X20CLSNIG TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25X20CLSNIG TR 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 W25X20CLSNIG TR?
For technical support, including W25X20CLSNIG TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25X20CLSNIG TR requirements.
6.How does Aetrix verify that W25X20CLSNIG TR is sourced from the original manufacturer or authorized distributors?
All W25X20CLSNIG TR 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 W25X20CLSNIG TR meets industry standards.
7.What is the process for return or replacement of W25X20CLSNIG TR?
All W25X20CLSNIG TR units undergo pre-shipment inspection (PSI). If there is an issue with W25X20CLSNIG TR, 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 W25X20CLSNIG TR part is unused and in its original packaging.
Return procedure for W25X20CLSNIG TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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