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Microchip Technology AT49BV640S-70CU
- Part No.:
- AT49BV640S-70CU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 64-VBGA, CSPBGA
- Datasheet:
-
AT49BV640S-70CU.pdf
- Description:
- IC FLASH 64MBIT PARALLEL 64CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,760
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Product details
Overview
AT49BV640S-70CU from Microchip Technology is a 64 Mbit (8 MB) parallel-interface NOR Flash memory IC with 3.0–3.6 V supply voltage, 70 ns access time, and 64-ball CBGA (10 mm × 10 mm, 0.8 mm pitch) package. It supports byte/word addressing, sector erase architecture, and operates across industrial temperature range (–40°C to +85°C), commonly used in boot code storage for embedded controllers and FPGA configuration.
For engineers reviewing the AT49BV640S-70CU datasheet, AT49BV640S-70CU pinout, AT49BV640S-70CU application, or AT49BV640S-70CU equivalent, key selection criteria include parallel x16 data bus compatibility, single-power-supply operation, hardware reset support, and sector protection granularity for firmware update safety.
Technical Context
The AT49BV640S-70CU implements a standard parallel NOR Flash interface with x16 data bus width and asynchronous read/write timing. It uses a 128-sector architecture (each 64 KB), supports CFI-compliant command set (JEDEC JESD68-A), and features embedded erase/program algorithms with internal VPP generation.
It integrates hardware data polling and toggle bit status reporting for operation completion detection, and supports both software and hardware write protection via WP# pin and sector lock bits - enabling robust firmware integrity management in resource-constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Type | NOR Flash - enables XIP (execute-in-place) execution of boot code without RAM copy |
| Capacity | 64 Mbit (8 MB) - sufficient for full bootloader + FPGA bitstream + minimal OS image |
| Interface | Parallel x16 - direct connection to microcontroller or FPGA address/data buses |
| Access Time | 70 ns - meets timing requirements for 14 MHz bus clock with setup/hold margin |
| Supply Voltage | 3.0–3.6 V - compatible with 3.3 V logic systems; no external VPP required |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded control and networking equipment |
| Package | 64-ball CBGA (10×10 mm, 0.8 mm pitch) - surface-mount, thermally efficient, RoHS-compliant |
Pinout & Package
AT49BV640S-70CU is housed in a 64-ball Ceramic Ball Grid Array (CBGA) package measuring 10 mm × 10 mm with 0.8 mm ball pitch. The package supports reflow soldering and provides low-inductance signal paths for high-speed parallel bus operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 64 Mbit addressing (byte mode: A0 LSB; word mode: A0 ignored) |
| DQ0–DQ15 | Data I/O (x16) | Bidirectional data bus; supports byte (DQ0–DQ7) or word (all 16) access per CE#/OE#/WE# timing |
| CE# | Chip Enable | Active-low chip select; device enters low-power standby when high |
| OE# | Output Enable | Active-low read strobe; controls output buffer enable during read cycles |
| WE# | Write Enable | Active-low write strobe; initiates program/erase commands when CE# and OE# are inactive |
| WP# | Write Protect | Hardware sector lock override; disables program/erase when asserted low |
| RESET# | Hardware Reset | Active-low global reset; returns device to reading state and clears internal state machines |
| VCC / VSS | Power / Ground | Single 3.3 V supply; dedicated power/ground balls distributed for noise reduction |
Key Features
| Feature | Design Value |
|---|---|
| CFI Compliant | JEDEC JESD68-A compliant command set enables standardized firmware updater integration across toolchains |
| Sector Erase Architecture | 128 uniform 64 KB sectors allow selective firmware updates without full chip erase |
| Embedded Algorithms | On-chip erase/program controllers eliminate need for external timing logic or host CPU cycle counting |
| Hardware Write Protection | WP# pin + sector lock bits provide dual-layer protection against accidental firmware corruption |
| Status Reporting | Data Polling (DQ7) and Toggle Bit (DQ6) enable real-time operation monitoring without polling overhead |
Applications
| Industrial PLC Firmware Storage | Network Router Boot Memory |
|---|---|
Use Scenario: Storing boot loader and real-time control firmware in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Primary nonvolatile boot memory mapped directly to MCU address space for XIP execution. Use Value: 70 ns access time ensures deterministic boot latency; sector erase enables field-upgradable firmware patches without full reflash downtime. | Use Scenario: Holding boot code and initialization images for multi-core network processors in enterprise-grade routers. IC Role / Device Role / Timing Role: Parallel NOR Flash providing fast, reliable instruction fetch during cold start and failover recovery. Use Value: Hardware reset (RESET#) and WP# support ensure safe reboot sequences and prevent corruption during power transients on PoE-powered line cards. |
| FPGA Configuration Storage | Medical Imaging System BIOS |
Use Scenario: Storing compressed bitstreams for Xilinx or Intel FPGAs used in portable ultrasound and diagnostic imaging equipment. IC Role / Device Role / Timing Role: Configuration memory accessed via FPGA's parallel slave select interface during power-on initialization. Use Value: CFI compliance allows automatic bitstream size and timing parameter detection by FPGA configuration controller, reducing BOM count. | Use Scenario: Hosting BIOS and safety-critical startup diagnostics in FDA-class II medical imaging devices requiring traceable firmware revisions. IC Role / Device Role / Timing Role: Secure, tamper-resistant boot memory with hardware write protection enabled at power-on. Use Value: Sector lock bits permit locked bootloader region while allowing field updates to application modules - meeting IEC 62304 traceability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NOR Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| S29GL064S90TFI010 | 64 Mbit, 90 ns access, 48-pin TSOP, supports VIO pin for 1.8 V I/O | Requires separate I/O voltage rail; not pin-compatible due to different package and pinout | Preferred where board layout supports TSOP and mixed-voltage I/O is needed |
| MX29LV640EBTI-70G | 64 Mbit, 70 ns, 48-pin TSOP, supports top/bottom boot block architecture | Boot block organization differs; lacks CFI query table; requires modified driver initialization | Valid alternative if legacy driver support exists and CBGA footprint is not required |
Compared with S29GL064S90TFI010 and MX29LV640EBTI-70G, the AT49BV640S-70CU offers superior thermal performance and higher density per area via CBGA, while its CFI compliance simplifies cross-platform firmware tools - making it optimal for new designs prioritizing layout efficiency and toolchain reuse.
Availability
AT49BV640S-70CU is available at Aetrix Electronics and suitable for industrial control systems, network infrastructure equipment, FPGA-based instrumentation, and medical imaging platforms requiring stable component supply over extended production lifecycles.
Supply support for AT49BV640S-70CU 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
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, Flash memory, and security ICs, with a focus on embedded control and connectivity solutions.
The AT49BV640S-70CU belongs to Microchip's legacy parallel NOR Flash product line, designed specifically for reliable, low-latency boot code and firmware storage in cost-sensitive industrial and communications applications.
FAQ
What is the maximum operating frequency supported by the AT49BV640S-70CU?
The AT49BV640S-70CU does not operate at a clock frequency - it is an asynchronous parallel NOR Flash. Its 70 ns access time defines the minimum read cycle time, supporting effective bus rates up to ~14 MHz when accounting for setup/hold margins. The AT49BV640S-70CU requires no system clock input and relies solely on CE#, OE#, and WE# timing control.
Does the AT49BV640S-70CU support both byte and word data access modes?
Yes, the AT49BV640S-70CU supports both byte (x8) and word (x16) access. In byte mode, DQ0–DQ7 are active and A0 serves as the byte-select bit; in word mode, all DQ0–DQ15 are used and A0 is ignored. Mode selection is determined by external hardware connection and address decoding - no internal register setting is required. This flexibility is built into the AT49BV640S-70CU's physical interface design.
Is the AT49BV640S-70CU compatible with JEDEC-standard CFI commands?
Yes, the AT49BV640S-70CU implements the JEDEC JESD68-A Common Flash Interface specification. It responds to standard CFI query commands at address 0x55, returning vendor ID, device geometry, timing parameters, and command set version. This enables interoperability with generic flash programming tools and bootloader frameworks that rely on CFI autodetection - a core capability of the AT49BV640S-70CU.
What is the purpose of the RESET# pin on the AT49BV640S-70CU?
The RESET# pin on the AT49BV640S-70CU provides hardware-level recovery from unknown states. When asserted low, it forces the device into reading mode, clears internal command registers, and aborts any ongoing erase or program operation. This ensures deterministic behavior after power-up or brownout events. Unlike software resets, RESET# guarantees full internal state reset - a critical safety feature in the AT49BV640S-70CU for mission-critical boot memory applications.
Can the AT49BV640S-70CU be used in automotive applications?
No, the AT49BV640S-70CU is specified only for industrial temperature range (–40°C to +85°C) and is not qualified to AEC-Q100 standards. It lacks automotive-grade screening, extended temperature validation, and failure rate reporting required for automotive ECUs. For automotive use, Microchip offers the AT45DB series or automotive-qualified Spansion/Infineon alternatives - the AT49BV640S-70CU is intended exclusively for industrial and commercial embedded systems.
AT49BV640S-70CU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 64-VBGA, CSPBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 64Mbit
- Memory Organization:
- 4M x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10µs
- Access Time:
- 70 ns
- Voltage - Supply:
- 2.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-CBGA (9x10)
AT49BV640S-70CU FAQ
1.How can I place an order for AT49BV640S-70CU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV640S-70CU 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 AT49BV640S-70CU reliable?
The price and inventory of AT49BV640S-70CU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV640S-70CU is usually 5 days.
3.What payment methods are accepted for AT49BV640S-70CU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV640S-70CU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV640S-70CU?
AT49BV640S-70CU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV640S-70CU 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 AT49BV640S-70CU?
For technical support, including AT49BV640S-70CU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV640S-70CU requirements.
6.How does Aetrix verify that AT49BV640S-70CU is sourced from the original manufacturer or authorized distributors?
All AT49BV640S-70CU 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 AT49BV640S-70CU meets industry standards.
7.What is the process for return or replacement of AT49BV640S-70CU?
All AT49BV640S-70CU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV640S-70CU, 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 AT49BV640S-70CU part is unused and in its original packaging.
Return procedure for AT49BV640S-70CU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV640S-70CU Tags
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