Winbond Electronics Corporation W29N02KVBIAF

Overview

W29N02KVBIAF from Winbond is a 2G-bit (256MB) SLC NAND Flash memory IC operating at 2.7V–3.6V, organized into 2,048 erasable blocks of 139,264 bytes each (64 × 2,176-byte pages), with x8 multiplexed I/O bus and standard NAND command set including two-plane read/program/erase and copy-back. It targets embedded storage in space-constrained industrial systems requiring reliable code shadowing and media data retention.

For engineers reviewing the W29N02KVBIAF datasheet, W29N02KVBIAF pinout, W29N02KVBIAF application, or W29N02KVBIAF equivalent, key selection considerations include its 25μs random read latency, 250μs typical page program time, 2ms block erase time, ONFI-compatible control interface (CLE/ALE/#CE/#WE/#RE), and support for industrial temperature range (−40°C to +85°C).

Technical Context

The W29N02KVBIAF implements a dual-plane NAND architecture enabling concurrent operations across even- and odd-numbered block planes-e.g., simultaneous read from one plane while programming another. Its command-latch protocol uses CLE and ALE signals to distinguish command, address, and data cycles on the shared x8 I/O bus.

It integrates internal high-voltage generation for program/erase, a status register with bit-defined error and operation flags, and hardware write protection via active-low #WP. The RY/#BY open-drain output provides asynchronous busy signaling without requiring polling during long-latency operations.

Key Specifications

Pinout & Package

W29N02KVBIAF is packaged in a 48-ball Very Fine-Pitch Ball Grid Array (VFBGA) with package code "D", measuring 8 mm × 8 mm × 0.7 mm (JEDEC MO-276AA). All Vcc and Vss balls must be connected; DNU and N.C. balls are unconnected and must remain floating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NAND flash memory applications.

Compared with MT29F2G08ABAEAH4-IT:E and TC58NVG2S3ETA00, W29N02KVBIAF delivers faster random access, integrated write protection, and dual-plane concurrency-making it optimal for latency-sensitive, safety-critical embedded boot and logging where layout flexibility allows VFBGA.

Availability

W29N02KVBIAF is available at Aetrix Electronics and suitable for industrial HMI storage, medical device firmware, network edge router boot, and smart energy meter data logging requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for W29N02KVBIAF 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, SRAM, and TrustME secure memory products.

The W29N series is designed specifically for industrial and automotive embedded systems demanding high reliability, extended temperature operation, and ONFI-standard NAND interface compatibility.

FAQ

What is the maximum random read access time for W29N02KVBIAF?

The W29N02KVBIAF specifies a maximum random read access time of 25 μs. This value represents the worst-case delay from the falling edge of #RE to valid data appearing on I/O[7:0], measured under industrial temperature conditions and full Vcc range (2.7 V–3.6 V). This latency directly impacts GUI responsiveness and boot code fetch performance in embedded systems using W29N02KVBIAF as primary storage.

Does W29N02KVBIAF support hardware write protection, and how is it implemented?

Yes, W29N02KVBIAF supports hardware write protection via the dedicated #WP (Write Protect) pin. When #WP is driven low, all program and erase operations-including page program, block erase, and copy-back-are disabled regardless of command sequence. This feature is implemented at the silicon level and cannot be overridden by software, making W29N02KVBIAF suitable for safety-critical firmware storage where accidental corruption must be physically prevented.

What package type does W29N02KVBIAF use, and what are its mechanical dimensions?

W29N02KVBIAF uses a 48-ball Very Fine-Pitch Ball Grid Array (VFBGA) package with JEDEC MO-276AA compliance and package code "D". Its footprint measures 8.0 mm × 8.0 mm, with a maximum body height of 0.70 mm and ball pitch of 0.5 mm. This compact VFBGA variant enables high-density PCB layouts in space-constrained industrial and medical devices where W29N02KVBIAF is deployed.

How does the dual-plane architecture of W29N02KVBIAF improve system-level performance?

The dual-plane architecture in W29N02KVBIAF divides the 2,048-block array into two independent planes (even- and odd-numbered blocks), allowing concurrent operations-e.g., reading from one plane while programming or erasing the other. This pipelining reduces effective latency for mixed workloads and accelerates garbage collection. In practice, W29N02KVBIAF achieves up to 2× throughput improvement in sustained write-then-read sequences compared to single-plane NAND, directly benefiting W29N02KVBIAF-based logging and firmware update subsystems.

What is the spare area size per page in W29N02KVBIAF, and how is it used?

Each 2,176-byte page in W29N02KVBIAF includes a 128-byte spare area (2,176 total − 2,048 main data = 128 bytes). This spare area stores ECC parity bits (typically 4-bit/544-byte correction), bad-block markers, logical-to-physical mapping metadata, and wear-leveling counters. Its fixed allocation is managed transparently by the host controller or FTL layer, ensuring robust data integrity and longevity-key for W29N02KVBIAF deployments in mission-critical industrial storage.