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Microchip Technology AT49BV640D-70CU
- Part No.:
- AT49BV640D-70CU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-VFBGA, CSPBGA
- Datasheet:
-
AT49BV640D-70CU.pdf
- Description:
- IC FLASH 64MBIT PARALLEL 48CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,689
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Product details
Overview
AT49BV640D-70CU from Microchip Technology (formerly Atmel) is a 64-Mbit (4M × 16) single-supply Flash memory IC operating at 2.65–3.6 V, featuring 70 ns access time, sector erase architecture with 135 sectors (127 × 32K-word + 8 × 4K-word), and suspend/resume capability for concurrent read/program during erase. It is used in embedded firmware storage, boot code retention, and industrial controller reprogramming.
For engineers reviewing the AT49BV640D-70CU datasheet, AT49BV640D-70CU pinout, AT49BV640D-70CU application, or AT49BV640D-70CU equivalent, key selection considerations include sector protection flexibility (Softlock/Hardlock + WP pin), CFI compliance for auto-configuration, VPP-assisted accelerated programming, 128-bit protection register security, and CBGA package compatibility with high-density PCB layouts.
Technical Context
The AT49BV640D-70CU implements a command-driven Write State Machine (WSM) that manages program, erase, suspend, and status reporting via standardized bus cycles. Its dual-voltage VPP pin (0.4 V inhibit / 1.65 V enable / 10.0 V acceleration) decouples write protection from core logic supply, enabling robust in-system programming control.
It supports Common Flash Interface (CFI) mode (entered via 98h command) for runtime identification of timing parameters, sector map, and device capabilities-enabling OS-agnostic flash management. The 128-bit protection register (factory-block A + user-programmable block B) provides hardware-enforced security for boot code or calibration data.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 64 Mbit (4,194,304 × 16-bit words) - supports full BIOS/firmware images in compact footprint |
| Access Time | 70 ns - enables direct execution from flash in real-time microcontroller systems |
| Supply Voltage | 2.65–3.6 V - compatible with 3.3 V system rails without level-shifting |
| Sector Architecture | 135 sectors (127 × 32K-word + 8 × 4K-word) - allows fine-grained firmware updates without full chip erase |
| Program Time | 10 µs per word - reduces field firmware update duration and power consumption |
| Erase Time | 700 ms (32K-word sector), 100 ms (4K-word sector) - balances speed vs. reliability for wear leveling |
| Endurance | 100,000 erase cycles - ensures long-term reliability in industrial logging or configuration storage |
| Package | 48-ball CBGA (7.0 × 9.0 mm, 0.8 mm pitch) - supports high I/O density and thermal performance in space-constrained designs |
Pinout & Package
AT49BV640D-70CU is housed in a 48-ball Ceramic Ball Grid Array (CBGA) package with 0.8 mm ball pitch and 7.0 × 9.0 mm body size. Pin assignment follows JEDEC MO-245 standard for flash memory devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A21 | Address Inputs | 22-bit address bus supporting full 4M-word addressing; A0–A1 select byte within 16-bit word |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel interface; outputs driven to VCCQ − 0.1 V, inputs tolerant to 5.5 V |
| CE, OE, WE | Chip/Output/Write Enable | Three independent controls prevent bus contention; OE/CE low + WE high = read mode |
| VPP | Write Protection & Acceleration Supply | 0.4 V cutoff prevents accidental writes; 10 V enables dual-word programming for manufacturing throughput |
| WP | Hardware Sector Lock Override | Low = Hardlock enforced; high = Hardlock disabled, allowing software unlock of protected sectors |
| RESET | Asynchronous Initialization | Pull-low halts all operations and forces high-Z outputs; release returns to read mode |
| VCCQ | Output Driver Supply | Separate 2.65–3.6 V rail for I/O drivers - isolates output noise from core logic supply |
| GND | Ground Reference | Two dedicated ground balls (pins 2 & 8) minimize ground bounce during high-speed reads/writes |
Key Features
| Feature | Design Value |
|---|---|
| Suspend/Resume for Erase & Program | Enables reading or programming one sector while erasing another - critical for real-time firmware updates without system freeze |
| Flexible Sector Protection (Softlock/Hardlock) | Software-configurable lock modes per sector: Softlock for frequently updated code; Hardlock + WP pin for immutable boot ROM |
| 128-bit Protection Register | Factory-programmed 64-bit ID + user-writable 64-bit block B - supports secure key storage and anti-cloning in medical/industrial devices |
| Common Flash Interface (CFI) | Standardized query table accessible via 98h command - eliminates hardcoded timing assumptions in bootloader and OS flash drivers |
| Hardware Data Protection | VCC sense (<1.8 V reset), VPP validation, and CE/OE/WE gating prevent spurious writes during power ramp or noise events |
| Green Packaging | RoHS-compliant, Pb-free, halide-free CBGA - meets IPC-J-STD-020 moisture sensitivity level 3 (MSL3) for standard SMT assembly |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers subject to frequent field revisions and EMI-rich factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic 70 ns read access for fast startup and reliable in-system reprogramming via JTAG or serial interface. Use Value: Sector erase architecture enables patching only modified function blocks (e.g., safety routines), reducing update time by >90% versus full-chip erase. | Use Scenario: Securing FDA-cleared boot firmware and calibration tables in portable diagnostic equipment requiring traceable, tamper-resistant storage. IC Role / Device Role / Timing Role: Trusted execution root-of-trust memory with 128-bit protection register and Hardlock + WP pin enforcing immutable boot sequence. Use Value: Hardware-enforced sector locking prevents unauthorized modification of regulatory-approved code, satisfying IEC 62304 software lifecycle requirements. |
| Automotive Infotainment System Update Memory | Telecom Base Station Configuration Storage |
Use Scenario: Holding updatable UI assets, voice recognition models, and OTA update staging buffers in automotive head units operating across -40°C to +105°C ambient. IC Role / Device Role / Timing Role: High-reliability flash memory with 100,000-cycle endurance and CFI support for adaptive driver initialization across multiple vehicle platforms. Use Value: Suspend/resume capability allows seamless background download of new firmware while maintaining responsive UI rendering from active sectors. | Use Scenario: Storing carrier-specific configuration profiles, RF calibration data, and fail-safe recovery images in 5G base station radios deployed in remote, unattended locations. IC Role / Device Role / Timing Role: Field-upgradeable nonvolatile memory with dual-word programming acceleration (VPP = 10 V) for rapid provisioning during site commissioning. Use Value: 4K-word small sectors enable atomic updates of individual radio parameters without disrupting active traffic on adjacent sectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF6401B-70-4C-EKE | 64 Mbit, 70 ns, 3.0–3.6 V; lacks VPP pin, no CFI support, uses different command set | No hardware-accelerated programming; no standardized CFI query - requires custom driver development | Select when cost sensitivity outweighs need for CFI interoperability and VPP-assisted programming speed |
| MX29LV640EBTI-70G | 64 Mbit, 70 ns, 2.7–3.6 V; includes CFI but no 128-bit protection register or Hardlock+WP integration | Lacks hardware-enforced sector locking with external pin - relies solely on software locks vulnerable to corruption | Select when CFI compatibility is required but advanced security features are unnecessary |
Compared with SST39VF6401B-70-4C-EKE and MX29LV640EBTI-70G, the AT49BV640D-70CU uniquely combines CFI compliance, VPP-accelerated programming, and dual-mode sector protection with hardware WP override - making it optimal for safety-critical or field-upgradable systems where reliability, security, and standardized driver support are jointly required.
Availability
AT49BV640D-70CU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, and automotive infotainment system update memory requiring stable component supply across extended product lifecycles.
Supply support for AT49BV640D-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 global semiconductor company specializing in microcontrollers, analog components, and nonvolatile memory solutions, with a focus on embedded control and secure connectivity.
The AT49BV640D-70CU belongs to Microchip's legacy Atmel Flash memory product line, designed specifically for high-reliability, in-system programmable firmware storage in industrial, medical, and automotive applications demanding long-term data integrity and flexible update mechanisms.
FAQ
What is the maximum operating temperature range for the AT49BV640D-70CU?
The AT49BV640D-70CU is rated for operation from –40°C to +85°C ambient temperature. Its absolute maximum junction temperature is +125°C under bias, and storage temperature extends to –65°C to +150°C. This range supports deployment in industrial control cabinets and automotive under-hood environments where thermal stability is critical for AT49BV640D-70CU firmware integrity.
Does the AT49BV640D-70CU support true 3.3 V-only operation without VPP voltage boosting?
Yes, the AT49BV640D-70CU supports full read, program, and erase functionality at 3.3 V with VPP ≥ 1.65 V - no external 10 V supply is required for standard operation. The VPP pin serves only to accelerate dual-word programming during manufacturing; normal single-word programming completes reliably at 3.3 V with VPP tied to VCC, making AT49BV640D-70CU suitable for 3.3 V-only systems.
How does the Hardlock protection mode interact with the WP pin on the AT49BV640D-70CU?
On the AT49BV640D-70CU, Hardlock protection is enabled via software command but enforced only when the WP pin is low. When WP = low, Hardlocked sectors become permanently read-only until power cycle or reset. When WP = high, Hardlock is overridden, permitting software unlock. This dual-layer control ensures AT49BV640D-70CU boot sectors remain tamper-proof during operation yet remain field-serviceable when needed.
Can the AT49BV640D-70CU be used in systems requiring Common Flash Interface (CFI) compliance?
Yes, the AT49BV640D-70CU fully implements the Common Flash Interface specification. Entering CFI Query mode with command 98h allows host software to read standardized parameter tables at fixed addresses, enabling automatic detection of sector layout, timing values, and supported commands - eliminating hardcoded assumptions and ensuring AT49BV640D-70CU interoperability with generic flash drivers in Linux, U-Boot, and RTOS environments.
What is the purpose of the VCCQ pin on the AT49BV640D-70CU, and how should it be connected?
The VCCQ pin on the AT49BV640D-70CU supplies power exclusively to the I/O buffer circuitry, ensuring clean, low-noise output levels independent of core logic voltage. For standard 3.3 V operation, VCCQ must be tied directly to VCC. Output high level is guaranteed at VCCQ − 0.1 V, so proper VCCQ connection is essential for meeting timing and signal integrity requirements in high-speed AT49BV640D-70CU read cycles.
AT49BV640D-70CU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-VFBGA, 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:
- 120µs
- 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:
- 48-CBGA (7x10)
AT49BV640D-70CU FAQ
1.How can I place an order for AT49BV640D-70CU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV640D-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 AT49BV640D-70CU reliable?
The price and inventory of AT49BV640D-70CU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV640D-70CU is usually 5 days.
3.What payment methods are accepted for AT49BV640D-70CU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV640D-70CU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV640D-70CU?
AT49BV640D-70CU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV640D-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 AT49BV640D-70CU?
For technical support, including AT49BV640D-70CU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV640D-70CU requirements.
6.How does Aetrix verify that AT49BV640D-70CU is sourced from the original manufacturer or authorized distributors?
All AT49BV640D-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 AT49BV640D-70CU meets industry standards.
7.What is the process for return or replacement of AT49BV640D-70CU?
All AT49BV640D-70CU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV640D-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 AT49BV640D-70CU part is unused and in its original packaging.
Return procedure for AT49BV640D-70CU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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