My Inquiry
My Account
Winbond Electronics Corporation W25B40AVSNIG T&R
- Part No.:
- W25B40AVSNIG T&R
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25B40AVSNIG T&R.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,464
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
W25B40AVSNIG T&R from Winbond is a 4 M-bit (512 KB) serial NOR flash memory IC with bottom-boot sector architecture, SPI interface (Modes 0/3), 40 MHz max clock, and hardware/software write protection. It supports page program (256 B), sector erase (120–650 ms), chip erase (5.5 s), 100,000 cycles, and 20-year data retention - deployed in microcontroller-based boot code storage and parameter configuration for embedded systems.
For engineers reviewing the W25B40AVSNIG T&R datasheet, W25B40AVSNIG T&R pinout, W25B40AVSNIG T&R application, or W25B40AVSNIG T&R equivalent, key selection criteria include boot-sector flexibility (4KB/8KB/16KB/32KB/64KB sectors), /WP and /HOLD pin support, SOIC-8 150-mil package compatibility, and status register BP2–BP0 granularity for field-safe firmware updates.
Technical Context
The W25B40AVSNIG T&R implements a bottom-boot sector organization with twelve non-uniform sectors: seven 64 KB, one 32 KB, one 16 KB, one 8 KB, and two 4 KB sectors. Its SPI interface operates at up to 40 MHz with dual-edge timing (data sampled on CLK rising edge, output on falling edge) and supports Hold functionality via dedicated /HOLD pin to pause active transfers.
Write protection is enforced through both hardware (/WP pin active-low control of Status Register writes when SRP=1) and software (BP2–BP0 bits enabling granular sector locking). The device uses a single 2.7–3.6 V supply, draws 5 mA active current and <1 µA in power-down mode, and features automatic WEL clearing after program/erase operations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 M-bit / 512 KB total capacity, byte-addressable with auto-increment read capability |
| Sector Architecture | Twelve sectors: seven 64 KB + one 32 KB + one 16 KB + one 8 KB + two 4 KB - enables precise boot/parameter partitioning |
| SPI Clock Max | 40 MHz - supports high-speed firmware loading and real-time parameter access in resource-constrained systems |
| Write Endurance | 100,000 program/erase cycles - suitable for frequent configuration updates without premature wear-out |
| Data Retention | 20 years at +85°C - ensures long-term reliability in industrial and automotive environments |
| Operating Voltage | 2.7 V to 3.6 V - compatible with standard 3.3 V logic rails and tolerant of supply droop during brown-out conditions |
| Power Consumption | 5 mA active, <1 µA power-down - ideal for battery-powered IoT nodes and portable devices |
Pinout & Package
W25B40AVSNIG T&R is housed in an 8-pin SOIC 150-mil package (Winbond package code SN), surface-mount compatible with standard reflow profiles and PCB assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| /CS | Chip Select Input | Active-low enable signal; must transition high→low before instruction acceptance; controls DO high-impedance state when deselected |
| DO | Serial Data Output | Push-pull output; data shifted out on CLK falling edge; high-impedance during /HOLD or /CS high |
| /WP | Write Protect Input | Hardware lock for Status Register writes when SRP=1; active-low; enables robust field update safety |
| GND | Ground Reference | Primary return path for all internal circuitry and I/O signals; requires low-impedance PCB connection |
| DI | Serial Data Input | CMOS input; instructions/addresses/data latched on CLK rising edge; ignored during /HOLD |
| CLK | Serial Clock Input | Master-generated SPI clock; supports Modes 0 (CLK idle low) and 3 (CLK idle high); timing-critical for setup/hold compliance |
| /HOLD | Hold Input | Pauses active SPI transaction while /CS remains low; allows bus sharing with other peripherals without data loss |
| VCC | Power Supply | 2.7–3.6 V nominal; must ramp monotonically at power-up; /CS tracking required per datasheet Figure 18 |
Key Features
| Feature | Design Value |
|---|---|
| Bottom-boot sector layout | Enables secure storage of bootloader in smallest 4 KB sector, isolating critical startup code from application updates |
| Granular BP2–BP0 protection | Eight protection states allow selective locking of boot/parameter sectors without disabling full-array access |
| /HOLD pin support | Permits interruption and resumption of ongoing page programming or read operations - essential for interrupt-driven MCU systems |
| Fast Read (0Bh) instruction | Reduces instruction overhead with dummy cycle insertion, improving throughput over standard Read (03h) in latency-sensitive applications |
| Power-down (B9h) mode | Reduces standby current to <1 µA while preserving memory contents and allowing instant wake-up via ABh release command |
Applications
| Industrial PLC Firmware Storage | Medical Device Parameter Configuration |
|---|---|
Use Scenario: Storing firmware images and runtime calibration tables in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Non-volatile boot memory and parameter store; provides deterministic startup sequence and field-updatable configuration registers. Use Value: Bottom-boot 4 KB sector protects bootloader integrity; BP2–BP0 bits prevent accidental overwrite of calibrated sensor offsets during routine maintenance. | Use Scenario: Holding device-specific settings (e.g., alarm thresholds, display brightness, audit logs) in portable diagnostic equipment with limited board space. IC Role / Device Role / Timing Role: Low-power serial flash for persistent parameter storage; interfaces directly to ARM Cortex-M0+ host via 4-wire SPI. Use Value: 2.7–3.6 V operation and <1 µA power-down current extend battery life; /WP pin enables hardware-enforced write lock during clinical use. |
| Automotive Body Control Module | Smart Home Gateway Bootloader |
Use Scenario: Hosting boot code and vehicle-specific configuration (e.g., door lock logic, lighting profiles) in body control units requiring AEC-Q100 alignment. IC Role / Device Role / Timing Role: SPI-connected NOR flash for secure boot execution and EEPROM-like parameter persistence across ignition cycles. Use Value: -40°C to +85°C rating ensures reliability under hood temperature extremes; 20-year data retention meets automotive lifecycle requirements. | Use Scenario: Storing signed bootloader image and Wi-Fi credentials in residential gateways where OTA updates must preserve factory settings. IC Role / Device Role / Timing Role: Primary boot memory with top/bottom boot flexibility; supports secure boot chain verification and rollback-safe firmware staging. Use Value: Dual 4 KB sectors allow atomic swap between active/inactive bootloader partitions; /HOLD enables safe interrupt handling during OTA download. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| W25Q40BVSNIG | Same 4 M-bit density and SOIC-8 package, but quad-SPI capable (QPI mode), higher 104 MHz clock, and uniform 4 KB sectors only | Lacks variable boot-sector sizes and BP2–BP0 granularity; better suited for high-throughput data logging than boot-critical systems | Select W25Q40BVSNIG only if QPI interface or faster sequential reads are required; not drop-in for boot-sector protection use cases |
| AT25DF041A-SHN-T | 4 M-bit SPI flash with 4 KB uniform sectors, 85 MHz max clock, and deep power-down mode; no /HOLD pin or bottom/top boot option | Missing /HOLD and boot-sector flexibility limits suitability for interrupt-sensitive or field-update-robust designs | Choose AT25DF041A-SHN-T for cost-sensitive consumer applications where boot partitioning and hold functionality are unnecessary |
Compared with W25B40AVSNIG T&R, W25Q40BVSNIG offers higher bandwidth but sacrifices boot-sector flexibility and fine-grained protection, while AT25DF041A-SHN-T reduces feature set and eliminates /HOLD - making W25B40AVSNIG T&R uniquely suited for safety-critical boot code storage requiring field-safe updates.
Availability
W25B40AVSNIG T&R is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device parameter configuration, and automotive body control module applications requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for W25B40AVSNIG T&R 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 SPI NOR/NAND flash, RAM, and mobile DRAM products.
The W25B series targets embedded systems requiring reliable, low-pin-count non-volatile storage with flexible boot architecture and robust write protection - optimized for microcontroller-based applications with stringent field-update safety requirements.
FAQ
What boot sector organization does W25B40AVSNIG T&R implement?
W25B40AVSNIG T&R implements bottom-boot sector organization as standard, with twelve sectors: seven 64 KB, one 32 KB, one 16 KB, one 8 KB, and two 4 KB. The smallest 4 KB sector resides at address 000000h and is intended for bootloader storage. Top-boot configuration is available only as special order (device ID 42h) and is not applicable to standard W25B40AVSNIG T&R.
Does W25B40AVSNIG T&R support SPI Mode 3?
Yes, W25B40AVSNIG T&R supports both SPI Mode 0 (CPOL=0, CPHA=0) and SPI Mode 3 (CPOL=1, CPHA=1). In Mode 3, the serial clock (CLK) idles high, and data is sampled on the rising edge of CLK for DI and output on the falling edge for DO - fully compliant with common microcontroller SPI peripherals.
How is write protection implemented on W25B40AVSNIG T&R?
W25B40AVSNIG T&R implements dual-layer write protection: software-controlled via Status Register BP2–BP0 bits (configurable per sector group) and hardware-enforced using the /WP pin in conjunction with the SRP bit. When SRP=1 and /WP is low, Status Register writes are blocked - preventing accidental modification of protection settings during field operation.
What is the purpose of the /HOLD pin on W25B40AVSNIG T&R?
The /HOLD pin on W25B40AVSNIG T&R allows active SPI transactions to be paused while /CS remains low. This enables safe bus sharing with other peripherals - for example, suspending a multi-byte page program during an MCU interrupt service routine and resuming exactly where it left off, preserving data integrity without requiring retransmission.
Is W25B40AVSNIG T&R pin-compatible with W25P40?
W25B40AVSNIG T&R is functionally compatible with W25P40 in terms of pinout, package (SOIC-8 SN), and basic SPI interface, but differs in sector count (12 vs. 8), sector size distribution, and Status Register protection granularity. While PCB layout is identical, firmware must account for different sector map and BP bit behavior - not a drop-in replacement without software validation.
W25B40AVSNIG T&R 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:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 40 MHz
- Write Cycle Time - Word, Page:
- 15ms, 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
W25B40AVSNIG T&R FAQ
1.How can I place an order for W25B40AVSNIG T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for W25B40AVSNIG T&R 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 W25B40AVSNIG T&R reliable?
The price and inventory of W25B40AVSNIG T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25B40AVSNIG T&R is usually 5 days.
3.What payment methods are accepted for W25B40AVSNIG T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25B40AVSNIG T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25B40AVSNIG T&R?
W25B40AVSNIG T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25B40AVSNIG T&R 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 W25B40AVSNIG T&R?
For technical support, including W25B40AVSNIG T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25B40AVSNIG T&R requirements.
6.How does Aetrix verify that W25B40AVSNIG T&R is sourced from the original manufacturer or authorized distributors?
All W25B40AVSNIG T&R 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 W25B40AVSNIG T&R meets industry standards.
7.What is the process for return or replacement of W25B40AVSNIG T&R?
All W25B40AVSNIG T&R units undergo pre-shipment inspection (PSI). If there is an issue with W25B40AVSNIG T&R, 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 W25B40AVSNIG T&R part is unused and in its original packaging.
Return procedure for W25B40AVSNIG T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
W25B40AVSNIG T&R Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
