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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Winbond Electronics Corporation W29GL032CB7A

Name: W29GL032CB7A
Brand: Winbond Electronics Corporation
SKU: W29GL032CB7A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: W29GL032CB7A

Manufacturer:: Winbond Electronics Corporation

Category:: Memory

Package:: 48-TFBGA

Datasheet:: W29GL032CB7A.pdf

Description:: IC FLASH 32MBIT PARALLEL 48TFBGA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

W29GL032CB7A from Winbond is a 32-Mbit (4 MB) parallel NOR Flash memory IC with uniform and boot-sector architecture, 70 ns random access time, 25 ns page read speed, and single 3.0 V supply (2.7–3.6 V). It supports byte/word configuration via #BYTE pin, includes 16-word write buffer and 8-word page read buffer, and is used in embedded firmware storage for industrial controllers and network boot loaders.

For engineers reviewing the W29GL032CB7A datasheet, W29GL032CB7A pinout, W29GL032CB7A application, or W29GL032CB7A equivalent, key selection criteria include sector protection granularity (64 uniform or top/bottom boot), CFI interface compatibility, deep power-down mode current (≤1 µA), EVIO voltage flexibility (1.65–V_CC), and hardware write-protect/#WP/ACC acceleration support.

Technical Context

The W29GL032CB7A implements a parallel asynchronous interface with dedicated #CE, #OE, and #WE controls, supporting both byte (DQ[7:0]) and word (DQ[15:0]) data widths selected by #BYTE logic level. Its internal architecture includes a 64-sector uniform layout or configurable top/bottom boot sectors - eight 4-kWord sectors plus 63 uniform 64-kWord sectors - with independent lock register and enhanced sector protect mechanisms.

It features dual status detection via RY/#BY output and Data# polling/toggling, full CFI (Common Flash Interface) compliance for host auto-configuration, and hardware-accelerated programming when V_HH is applied to #WP/ACC. Erase suspend/resume and program suspend/resume enable concurrent background operations without interrupting active reads.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Density	32 Mbit (4 MB); supports firmware image storage for microcontrollers with ≥1 MB code footprint.
Access Time	70 ns random read; enables direct XIP (eXecute-In-Place) execution from Flash in real-time systems.
Page Read Speed	25 ns; reduces latency during burst instruction fetches in boot ROM sequences.
Write Buffer Size	16-word (32-byte); cuts multi-word programming time by up to 75% vs. single-word writes.
Deep Power-Down Current	≤1 µA at V_CC = 3.0 V; extends battery life in always-on IoT edge nodes.
Data Retention	>20 years at T_A ≤ 85°C; ensures long-term reliability in unattended infrastructure equipment.
Erase/Program Cycles	>100,000 cycles per sector; supports field firmware updates over product lifetime.
Operating Voltage	2.7–3.6 V; compatible with 3.3 V LDO-regulated rails without level-shifting.

Pinout & Package

W29GL032CB7A is packaged in a 48-pin TSOP (12 × 20 mm) with standard parallel Flash pinout. Pin functions are electrically defined per JEDEC MS-026, supporting drop-in replacement in legacy 3.3 V NOR designs.

Pin/Terminal	Circuit Role	Design Meaning
A0–A20	Address Inputs	21-bit address bus; A-1 alias on DQ15 in byte mode enables seamless 8-bit data path mapping.
DQ0–DQ14	Data I/O (x16)	Lower 15 bits of 16-bit bidirectional data bus; DQ15 repurposed as A-1 in byte mode.
DQ15/A-1	Mode-Dependent Terminal	In word mode (#BYTE=VIH): DQ15 = data bit 15; in byte mode (#BYTE=VIL): A-1 = LSB address for 8-bit access.
#CE, #OE, #WE	Chip/Output/Write Enable	Asynchronous control trio; enables standard SRAM-like timing with no clock required.
#WP/ACC	Hardware Protect / Acceleration	Active-low write protect for top/bottom sectors; applies V_HH to accelerate programming during production.
RY/#BY	Ready/Busy Status	Open-drain output; low during erase/program; enables polling or interrupt-driven operation.
#RESET	Hardware Reset	Asynchronous reset input; forces device into read mode and clears internal state.
EVIO	Enhanced Variable I/O Supply	Input reference for all I/O thresholds; sets VIH/VIL levels dynamically between 1.65 V and V_CC.

Key Features

Feature	Design Value
CFI Interface Support	Enables automatic host detection of geometry, timing, and command set - eliminates hardcoded Flash drivers.
Secured Silicon Sector	128-word (256-byte) factory-programmable region with 8-word electronic serial number for secure device identity.
Enhanced Sector Protection	Combines volatile DPB and non-volatile IPB registers for flexible, field-updatable sector lockdown without firmware changes.
Suspend/Resume Capability	Allows temporary halt of erase or program operations to service high-priority read requests - critical for real-time OS environments.
Deep Power-Down Mode	Enters ultra-low-power state (<1 µA) with instant wake-up; ideal for battery-backed configuration storage in gateways.
Accelerated Programming	Reduces typical word-program time to ≤15 µs when V_HH applied to #WP/ACC - improves manufacturing throughput.

Applications

Industrial PLC Firmware Storage	Network Router Boot Memory
Use Scenario: Storing firmware images and configuration tables in programmable logic controllers operating in harsh temperature environments (−40°C to +85°C). IC Role / Device Role / Timing Role: Primary non-volatile code storage with XIP capability; provides deterministic 70 ns read latency for real-time task scheduling. Use Value: Uniform 64-kWord sector layout simplifies firmware partitioning; >100,000 erase cycles support decades of field updates without hardware replacement.	Use Scenario: Holding bootloader and kernel images in enterprise-grade routers requiring fast boot and secure firmware validation. IC Role / Device Role / Timing Role: Boot memory mapped to CPU address space; uses CFI to auto-negotiate timing parameters during initialization. Use Value: Secured Silicon Sector stores immutable cryptographic keys; top-boot architecture isolates bootloader from application updates.
Medical Diagnostic Equipment BIOS	Automotive Infotainment Head Unit
Use Scenario: Storing diagnostic firmware and calibration data in FDA-cleared imaging devices requiring traceable data retention. IC Role / Device Role / Timing Role: Non-volatile BIOS storage with >20-year data retention; leverages hardware write-protect to prevent accidental corruption. Use Value: #WP/ACC pin enables permanent lockdown of safety-critical boot sectors; deep power-down mode minimizes standby leakage in portable units.	Use Scenario: Hosting infotainment OS loader and UI assets in automotive head units subject to AEC-Q100 Grade 2 qualification requirements. IC Role / Device Role / Timing Role: Parallel Flash memory interfaced to ARM Cortex-A application processor; uses page mode for rapid UI asset loading. Use Value: 25 ns page read speed accelerates GUI rendering; bottom-boot configuration protects recovery firmware from over-the-air update failures.

Industrial PLC Firmware Storage

Network Router Boot Memory

Use Scenario: Storing firmware images and configuration tables in programmable logic controllers operating in harsh temperature environments (−40°C to +85°C).

IC Role / Device Role / Timing Role: Primary non-volatile code storage with XIP capability; provides deterministic 70 ns read latency for real-time task scheduling.

Use Value: Uniform 64-kWord sector layout simplifies firmware partitioning; >100,000 erase cycles support decades of field updates without hardware replacement.

Use Scenario: Holding bootloader and kernel images in enterprise-grade routers requiring fast boot and secure firmware validation.

IC Role / Device Role / Timing Role: Boot memory mapped to CPU address space; uses CFI to auto-negotiate timing parameters during initialization.

Use Value: Secured Silicon Sector stores immutable cryptographic keys; top-boot architecture isolates bootloader from application updates.

Medical Diagnostic Equipment BIOS

Automotive Infotainment Head Unit

Use Scenario: Storing diagnostic firmware and calibration data in FDA-cleared imaging devices requiring traceable data retention.

IC Role / Device Role / Timing Role: Non-volatile BIOS storage with >20-year data retention; leverages hardware write-protect to prevent accidental corruption.

Use Value: #WP/ACC pin enables permanent lockdown of safety-critical boot sectors; deep power-down mode minimizes standby leakage in portable units.

Use Scenario: Hosting infotainment OS loader and UI assets in automotive head units subject to AEC-Q100 Grade 2 qualification requirements.

IC Role / Device Role / Timing Role: Parallel Flash memory interfaced to ARM Cortex-A application processor; uses page mode for rapid UI asset loading.

Use Value: 25 ns page read speed accelerates GUI rendering; bottom-boot configuration protects recovery firmware from over-the-air update failures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar parallel NOR Flash memory applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
S29GL032N90TFI010	48-pin TSOP, same density and voltage, but lacks EVIO and deep power-down mode; max tACC = 90 ns.	Less suitable for battery-powered or mixed-voltage systems requiring dynamic I/O threshold control.	Choose if CFI compatibility and 90 ns access suffice and EVIO/deep power-down are not required.
MX29GL320EBTI-90G	48-pin TSOP, identical 70 ns access and 3.0 V operation, but no secured silicon sector or factory-lockable security region.	Cannot store immutable device IDs or factory-programmed keys; limited for secure boot implementations.	Prefer when basic firmware storage suffices and cryptographic identity management is handled externally.

Compared with S29GL032N90TFI010 and MX29GL320EBTI-90G, the W29GL032CB7A delivers superior system-level integration through EVIO voltage adaptability, deep power-down current <1 µA, and a dedicated secured silicon sector - making it optimal for secure, low-power, and mixed-signal embedded platforms.

Availability

W29GL032CB7A is available at Aetrix Electronics and suitable for industrial PLC firmware storage, network router boot memory, medical diagnostic BIOS, automotive infotainment head units, and secure bootloader applications requiring stable component supply across extended product lifecycles.

Supply support for W29GL032CB7A 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 manufacturer specializing in specialty memory solutions, including SPI/NOR Flash, RAM, and TrustME secure memory products.

The W29GL032CB7A belongs to Winbond's W29GL series of 3.0 V parallel NOR Flash devices, designed specifically for embedded systems requiring high reliability, fast read performance, and robust firmware update capabilities in industrial and networking applications.

FAQ

What is the maximum operating frequency supported by the W29GL032CB7A?

The W29GL032CB7A is an asynchronous parallel Flash device and does not operate on a clock signal. Its performance is defined by access times: 70 ns random read and 25 ns page read. These values correspond to effective throughput of ~14.3 MB/s (random) and ~40 MB/s (page mode) at 3.3 V, assuming standard bus loading and PCB layout.

Does the W29GL032CB7A support both byte and word data interfaces?

Yes, the W29GL032CB7A supports both configurations via the #BYTE pin. When #BYTE = VIH, it operates in 16-bit word mode (DQ0–DQ15 active); when #BYTE = VIL, it operates in 8-bit byte mode with DQ15 repurposed as address bit A-1. This dual-mode capability allows flexible integration with 8-bit or 16-bit microcontrollers without external glue logic.

How does the secured silicon sector function in the W29GL032CB7A?

The secured silicon sector in the W29GL032CB7A is a 128-word (256-byte) factory-programmable region containing a unique 8-word electronic serial number. It can be permanently locked by the customer or pre-locked at factory. Once locked, contents are read-only and immune to erase or program commands - enabling tamper-resistant device identification and secure boot key storage.

Can the W29GL032CB7A be used in deep power-down mode while maintaining data integrity?

Yes, the W29GL032CB7A retains full data integrity in deep power-down mode. In this state, V_CC remains powered (≥2.7 V), but internal circuitry is gated to reduce current draw to ≤1 µA. All stored data remains valid, and exit time from deep power-down to active read mode is ≤100 µs - verified per datasheet Section 8.5.6.

Is the W29GL032CB7A pin-compatible with earlier Winbond W29GL032C variants?

Yes, the W29GL032CB7A shares identical pinout, electrical characteristics, and command set with other W29GL032C family members in the same 48-pin TSOP package. The "B7A" suffix denotes specific temperature grade (−40°C to +85°C), packaging, and screening - all functional and mechanical interfaces remain fully compatible per datasheet Revision H.

W29GL032CB7A Specifications

Product attributes: Attribute value

Manufacturer:: Winbond Electronics Corporation

Series:: -

Package/Case:: 48-TFBGA

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: FLASH

Technology:: FLASH - NOR

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:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-TFBGA (6x8)

W29GL032CB7A FAQ

1.How can I place an order for W29GL032CB7A through Aetrix?

Please submit a Request for Quotation (RFQ) for W29GL032CB7A 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 W29GL032CB7A reliable?

The price and inventory of W29GL032CB7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W29GL032CB7A is usually 5 days.

3.What payment methods are accepted for W29GL032CB7A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W29GL032CB7A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for W29GL032CB7A?

W29GL032CB7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your W29GL032CB7A 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 W29GL032CB7A?

For technical support, including W29GL032CB7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W29GL032CB7A requirements.

6.How does Aetrix verify that W29GL032CB7A is sourced from the original manufacturer or authorized distributors?

All W29GL032CB7A 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 W29GL032CB7A meets industry standards.

7.What is the process for return or replacement of W29GL032CB7A?

All W29GL032CB7A units undergo pre-shipment inspection (PSI). If there is an issue with W29GL032CB7A, 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 W29GL032CB7A part is unused and in its original packaging.

Return procedure for W29GL032CB7A:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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