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Winbond Electronics Corporation W19B320BTT7H
- Part No.:
- W19B320BTT7H
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
W19B320BTT7H.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,548
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Product details
Overview
W19B320BTT7H from Winbond is a 32 Mbit (4M × 8 / 2M × 16) single-bank CMOS flash memory operating at 2.7–3.6 V, featuring 70 ns read access time, sector erase architecture (eight 8 KB + sixty-three 64 KB sectors), and hardware write protection via #WP/ACC pin. It supports in-system programming/erasure without VPP, and is used in embedded boot code storage for industrial controllers and network edge devices.
For engineers reviewing the W19B320BTT7H datasheet, W19B320BTT7H pinout, W19B320BTT7H application, or W19B320BTT7H equivalent, key selection considerations include top/bottom boot block configuration, CFI compliance for driver portability, security sector OTP capability, and TFBGA48 (6×8 mm) package compatibility with high-density PCB layouts.
Technical Context
The W19B320BTT7H implements a JEDEC-standard byte/word-configurable interface with #BYTE pin control, enabling dynamic switching between DQ0–DQ7 (byte) and DQ0–DQ15 (word) data bus operation. Its internal state machine supports autonomous erase suspend/resume, unlock bypass programming, and automatic sleep mode triggered by stable address hold (>tACC + 30 ns).
Hardware features include RY/#BY status signaling for embedded algorithm completion detection, #RESET-driven hard reset to read mode, and dual-function #WP/ACC pin supporting both permanent boot-sector write protection (VIL) and accelerated programming (VHH). Sector protection is implemented via VID-assisted hardware methods or CFI-based software control, with factory-locked or customer-lockable 256-byte security sector.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (4M × 8 or 2M × 16 organization); enables compact boot firmware storage with flexible bus-width matching. |
| Read Access Time | 70 ns; ensures compatibility with 14 MHz microcontroller bus timing without wait states. |
| Sector Erase Time | 0.4 s typical; allows rapid field firmware updates of individual 8 KB or 64 KB regions without full chip interruption. |
| Program/Erase Cycles | 100K cycles; supports long-term field reprogramming in industrial control and telecom infrastructure. |
| Data Retention | 20 years; guarantees persistent boot code integrity across extended product lifecycles. |
| Supply Voltage | 2.7–3.6 V; operates directly from standard 3.3 V rail without level-shifting or auxiliary supplies. |
| Standby Current | 0.2 μA typical; minimizes power draw in always-on embedded systems during idle periods. |
Pinout & Package
W19B320BTT7H is packaged in 48-ball TFBGA (6×8 mm, ball pitch 0.40 mm), optimized for high-density PCB layouts and thermal performance in space-constrained industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 4M-word or 2M-word addressing; A-1 alias on DQ15 in byte mode. |
| DQ0–DQ14 | Data I/O (Word) | 15-bit bidirectional data path; DQ15 functions as A-1 in byte mode, enabling LSB address extension. |
| #CE / #OE / #WE | Chip/Output/Write Enable | Standard asynchronous SRAM-like control; enables direct MPU interfacing without glue logic. |
| #WP/ACC | Write Protect / Acceleration | VIL = permanent boot-sector lock; VHH = accelerated programming (requires external 8.5–11.5 V source). |
| RY/#BY | Ready/Busy Status | Active-low open-drain output indicating active erase/program cycle; eliminates need for polling overhead. |
| #RESET | Hardware Reset | Asynchronous reset to read mode; synchronizes boot firmware fetch after system power-up or fault recovery. |
Key Features
| Feature | Design Value |
|---|---|
| Erase Suspend/Resume | Allows interrupting sector erase to service real-time write requests in same bank-critical for multitasking firmware. |
| CFI Compliance | Stores device geometry, command set, and timing parameters on-chip, enabling generic flash drivers across Winbond and third-party parts. |
| Security Sector (256 B) | Factory-locked or customer-lockable OTP region for ESN storage; DQ7 indicator bit prevents unauthorized cloning or substitution. |
| Automatic Sleep Mode | Enters ultra-low-power state after tACC + 30 ns address stability-reduces active current by >99% without software intervention. |
| Unlock Bypass Programming | Reduces multi-byte programming time by eliminating repeated unlock sequences; cuts total write latency by ~40% in burst operations. |
Applications
| Industrial PLC Firmware Storage | Network Router Boot Memory |
|---|---|
Use Scenario: Storing boot loader and real-time OS kernel in programmable logic controllers deployed in factory automation environments with wide temperature swings. IC Role / Device Role / Timing Role: Non-volatile boot code repository with hardware write protection to prevent accidental corruption during firmware upgrades or brown-out events. Use Value: Top/bottom boot block configuration ensures safe execution of recovery routines even if main application sectors are erased; 20-year retention guarantees firmware persistence over equipment lifetime. | Use Scenario: Holding bootloader and configuration images in enterprise-grade routers requiring secure, field-upgradable firmware with tamper resistance. IC Role / Device Role / Timing Role: CFI-compliant flash memory enabling standardized driver support across multiple router platforms and firmware versions. Use Value: Security sector OTP capability stores immutable ESN for device identity and license binding; #WP/ACC pin provides hardware-enforced boot sector lockdown against remote exploit attempts. |
| Medical Diagnostic Equipment BIOS | Smart Energy Meter Firmware |
Use Scenario: Hosting BIOS and calibration data in portable ultrasound and imaging systems requiring FDA-compliant traceability and data integrity. IC Role / Device Role / Timing Role: High-reliability flash memory with 100K program/erase cycles and -40°C to +85°C industrial temp grade for mission-critical diagnostics. Use Value: Sector erase architecture isolates calibration updates from core BIOS; automatic sleep mode reduces standby power to <1 μW-extending battery life in portable units. | Use Scenario: Storing metrology firmware and tariff tables in ANSI C12.22-compliant smart meters deployed in harsh outdoor substations. IC Role / Device Role / Timing Role: Low-power, high-retention flash memory supporting over-the-air (OTA) firmware patches without compromising meter accuracy certification. Use Value: 0.2 μA standby current meets IEC 62056-21 low-power requirements; 70 ns read access enables fast response to AMI polling commands without latency penalties. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| S29GL032N90TFI010 | 48-pin TSOP-II package; 90 ns read access; no TFBGA option; requires VPP for some legacy programming modes. | Limited to board-level designs with TSOP footprint; lacks automatic sleep mode and CFI query flexibility. | Select when legacy PCB layout reuse is required and TFBGA density is not critical. |
| MX29LV320ETTI-70G | 70 ns read access; 48-pin TSOP; no security sector; only bottom-boot configuration; no #WP/ACC acceleration function. | Suitable for cost-sensitive consumer electronics but lacks industrial-grade security and boot flexibility. | Choose for non-security-critical applications where boot block topology is fixed and accelerated programming is unnecessary. |
Compared with S29GL032N90TFI010 and MX29LV320ETTI-70G, W19B320BTT7H offers superior packaging density (TFBGA48), integrated security sector OTP, automatic sleep mode for ultra-low-power operation, and dual-mode #WP/ACC functionality-making it optimal for next-generation industrial and connected-device designs requiring field upgrade resilience and footprint efficiency.
Availability
W19B320BTT7H is available at Aetrix Electronics and suitable for industrial PLC firmware storage, network router boot memory, medical diagnostic equipment BIOS, and smart energy meter firmware requiring stable component supply, long-term lifecycle support, and guaranteed TFBGA48 sourcing.
Supply support for W19B320BTT7H 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 industrial, automotive, and communications markets since 1987.
The W19B320BTT7H belongs to Winbond's W19B series of high-reliability, low-voltage CMOS flash memories designed specifically for embedded boot code storage in space-constrained, thermally demanding applications requiring CFI compatibility and hardware security features.
FAQ
What is the package type and dimensions of the W19B320BTT7H?
The W19B320BTT7H uses a 48-ball TFBGA package measuring 6 mm × 8 mm with 0.40 mm ball pitch. This compact footprint supports high-density PCB layouts in industrial and networking equipment. The device also has a 48-pin TSOP variant, but W19B320BTT7H specifically denotes the TFBGA version per Winbond's ordering nomenclature. Pin compatibility between TFBGA and TSOP variants is not guaranteed due to differing signal routing and thermal characteristics.
Does the W19B320BTT7H support both top-boot and bottom-boot configurations?
Yes, the W19B320BTT7H supports both top-boot and bottom-boot sector architectures, selectable at manufacturing. In top-boot configuration, the two outermost 8 KB sectors reside at the highest address range (e.g., 1FF000h–1FF007h in word mode); in bottom-boot, they occupy the lowest addresses (000000h–000007h). This flexibility allows safe boot code placement regardless of system memory map requirements, and is verified in the device's sector address tables (Sections 7.3 and 7.4 of the datasheet).
How does the security sector function in the W19B320BTT7H?
The W19B320BTT7H includes a 256-byte security sector that operates as one-time-programmable (OTP) memory. It ships either factory-locked (DQ7 = "1", ESN preprogrammed) or customer-lockable (DQ7 = "0", unprogrammed). Once locked, the sector cannot be erased or rewritten. Access requires an explicit Enter Security Sector command sequence, and the sector maps to boot sector addresses during active mode-enabling secure device identification without dedicated hardware fuses.
What voltage levels are required for the #WP/ACC pin on the W19B320BTT7H?
The #WP/ACC pin on the W19B320BTT7H operates in three defined states: VIH (2.7–3.6 V) enables normal operation with boot-sector protection status determined by prior software commands; VIL (0–0.4 V) permanently disables programming/erasure of the two outermost 8 KB boot sectors; and VHH (8.5–11.5 V) activates accelerated programming mode. Leaving #WP/ACC floating is strictly prohibited-it causes undefined behavior and potential device malfunction per Section 6.1.10 of the datasheet.
Is the W19B320BTT7H compatible with standard microprocessor bus cycles?
Yes, the W19B320BTT7H is fully compatible with standard asynchronous microprocessor bus cycles. Its #CE, #OE, and #WE inputs accept standard TTL/CMOS logic levels, and timing parameters (e.g., tCE = 70 ns, tAA = 70 ns) align with common 14 MHz MPU interfaces. No additional address latching or wait-state generation is required for basic read/write operations, and the device automatically enters read mode on power-up or after #RESET assertion-ensuring seamless integration into existing embedded controller designs.
W19B320BTT7H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- -
- Package/Case:
- 48-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 32Mbit
- Memory Organization:
- 4M x 8, 2M x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 70ns
- Access Time:
- 70 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
W19B320BTT7H FAQ
1.How can I place an order for W19B320BTT7H through Aetrix?
Please submit a Request for Quotation (RFQ) for W19B320BTT7H 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 W19B320BTT7H reliable?
The price and inventory of W19B320BTT7H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W19B320BTT7H is usually 5 days.
3.What payment methods are accepted for W19B320BTT7H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W19B320BTT7H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W19B320BTT7H?
W19B320BTT7H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W19B320BTT7H 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 W19B320BTT7H?
For technical support, including W19B320BTT7H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W19B320BTT7H requirements.
6.How does Aetrix verify that W19B320BTT7H is sourced from the original manufacturer or authorized distributors?
All W19B320BTT7H 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 W19B320BTT7H meets industry standards.
7.What is the process for return or replacement of W19B320BTT7H?
All W19B320BTT7H units undergo pre-shipment inspection (PSI). If there is an issue with W19B320BTT7H, 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 W19B320BTT7H part is unused and in its original packaging.
Return procedure for W19B320BTT7H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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