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Microchip Technology AT49BV320DT-70CU
- Part No.:
- AT49BV320DT-70CU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 47-VFBGA, CSBGA
- Datasheet:
-
AT49BV320DT-70CU.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 47CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,574
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Product details
Overview
AT49BV320DT-70CU from Microchip Technology (formerly Atmel) is a 32-Mbit (2M × 16) single-supply Flash memory IC designed for embedded system code and data storage. It operates at 2.65–3.6 V, delivers 70 ns access time, supports sector erase with 63 × 64 KB + 8 × 8 KB sectors, and features suspend/resume for concurrent read/program during erase - enabling real-time firmware updates in industrial controllers and telecom baseband modules.
For engineers reviewing the AT49BV320DT-70CU datasheet, AT49BV320DT-70CU pinout, AT49BV320DT-70CU application, or AT49BV320DT-70CU equivalent, key selection criteria include sector protection flexibility (Softlock/Hardlock + WP/VPP control), CFI compliance for auto-configuration, 100,000 erase cycles, and dual-package availability (48-pin TSOP-I and 47-ball CBGA) with boot-block configuration options.
Technical Context
The AT49BV320DT-70CU implements a command-based Write State Machine (WSM) architecture with dedicated status register (SR7–SR0) for real-time monitoring of program/erase progress and error conditions (VPPS, PS, ES, SLS). Its dual-sector protection scheme combines software-configurable Softlock with hardware-gated Hardlock tied to the WP pin, enabling secure, field-upgradable firmware partitions.
It integrates hardware data protection (VCC sense, 10 ms power-on delay, VPP threshold detection), supports Common Flash Interface (CFI) query mode via 98h command, and provides 128-bit user-programmable protection register with factory-sealed Sector A and lockable Sector B - all accessible through standardized bus-cycle command sequences without external high-voltage circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit words) - supports full bootloader + application image storage in space-constrained designs |
| Access Time | 70 ns - enables direct execution (XIP) from flash in microcontroller systems with ≤14 MHz bus timing |
| Supply Voltage | 2.65 V to 3.6 V - compatible with 3.3 V logic domains and eliminates need for separate VCC/VCCQ regulators |
| Erase Architecture | 71 sectors: 63 × 64 KB + 8 × 8 KB - allows granular firmware partitioning (e.g., separate boot, config, app sectors) |
| Program/Erase Speed | 10 µs word program / 100 ms sector erase - balances speed with reliability for field firmware patching |
| Endurance | 100,000 erase cycles per sector - validated for >10-year operation in industrial logging and telemetry applications |
| Interface Standard | Common Flash Interface (CFI) compliant - enables OS-agnostic flash management (e.g., U-Boot, Linux MTD) without vendor-specific drivers |
| Protection Features | VPP pin (0.4 V inhibit / 1.65 V enable / 10 V accelerated programming) + WP pin + 128-bit protection register - provides layered security against accidental or malicious reprogramming |
Pinout & Package
AT49BV320DT-70CU is available in two RoHS-compliant packages: 48-pin TSOP-I (Type 1, 12 mm × 20 mm) and 47-ball CBGA (8 mm × 10 mm, 0.8 mm pitch). Both support top/bottom boot-block configuration and share identical pin functionality.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2M-word addressing; A0–A7 used for command/data latching in CFI and protection register modes |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel interface; outputs driven to VCCQ − 0.1 V (not VCC); inputs tolerant to 5.5 V for mixed-voltage system interfacing |
| CE, OE, WE | Chip/Output/Write Enable | Three independent controls prevent bus contention; OE/CE low + WE high = read mode; standard microprocessor timing compatible |
| VPP | Programming Voltage Control | Enables/disables program/erase (0.4 V cutoff); 10 V input accelerates dual-word programming - requires external voltage switch or charge pump |
| WP | Sector Write Protect Input | Hardware gate for Hardlock mode: WP = low locks protected sectors permanently until reset; WP = high allows unlock via command |
| RESET | Asynchronous Initialization | Pulls outputs to high-Z and forces read mode on rising edge - simplifies power sequencing and recovery from watchdog resets |
| VCCQ | Output Driver Supply | Separate 2.65–3.6 V supply for I/O buffers - isolates output swing from core VCC noise in mixed-signal PCB layouts |
| NC | No Connect | Unbonded pin in TSOP package (pin 9); electrically isolated - must be left floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Erase/Program Suspend & Resume | Allows reading or programming any non-erasing sector while another sector erases - essential for real-time interrupt handling during firmware updates |
| Flexible Sector Protection | Independent Softlock (software-unlockable) and Hardlock (WP-gated) per sector - enables secure boot + updatable application partitioning |
| 128-bit Protection Register | Factory-programmed 64-bit ID (Sector A) + user-writable/lockable 64-bit key (Sector B) - supports device authentication and encrypted firmware binding |
| Hardware Data Protection | VCC sense (1.8 V cutoff), 10 ms power-on delay, and VPP validation prevent spurious writes during brown-out or startup transients |
| CFI Query Mode | Standardized 98h command returns geometry, timing, and command-set descriptors - eliminates hard-coded flash parameters in BSPs and bootloaders |
| Green Packaging | Pb-free and halide-free TSOP/CBGA - meets IPC-J-STD-609A and RoHS Directive 2011/65/EU requirements for industrial and automotive deployments |
Applications
| Industrial PLC Firmware Storage | Telecom Baseband Configuration |
|---|---|
Use Scenario: Storing ladder logic programs and I/O mapping tables in programmable logic controllers requiring field updates without downtime. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector-level write locking - boot sector remains protected while application sectors accept over-the-air patches. Use Value: Suspend/resume capability enables background firmware validation during runtime, reducing maintenance window duration by >60% versus sequential erase-then-program. | Use Scenario: Holding DSP coefficient tables, calibration data, and protocol stacks in 4G/LTE remote radio units exposed to thermal cycling. IC Role / Device Role / Timing Role: High-reliability parameter storage with CFI auto-detection - ensures correct timing initialization across temperature (-40°C to +85°C) and voltage (2.7–3.6 V) ranges. Use Value: 100,000 erase cycles and VPP-driven accelerated programming support >15 years of daily calibration updates without wear-out failure. |
| Medical Device Bootloader | Automotive Infotainment UI Assets |
Use Scenario: Securing FDA-compliant bootloader images in portable diagnostic equipment where firmware integrity is safety-critical. IC Role / Device Role / Timing Role: Dual-protection register (factory ID + user key) enforces cryptographic signature verification before application load. Use Value: Hardlock + WP pin prevents unauthorized bootloader modification even if host MCU is compromised - satisfies IEC 62304 SW safety Class C requirements. | Use Scenario: Storing graphical assets (icons, fonts, animations) and localization strings in vehicle head units with frequent UI version upgrades. IC Role / Device Role / Timing Role: High-speed 70 ns read access enables direct rendering from flash, eliminating SRAM copy overhead and reducing BOM cost. Use Value: Top/bottom boot-block configuration allows seamless A/B firmware swapping - achieving zero-downtime UI updates during vehicle ignition cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF3201C-70-4C-EKE | 32 Mbit, 70 ns, 3.0–3.6 V supply; lacks VPP pin and CFI support; uses different command set | No suspend/resume; no 128-bit protection register; limited sector protection granularity | Choose for cost-sensitive designs where CFI and advanced protection are unnecessary |
| MX29LV320ETTI-70G | 32 Mbit, 70 ns, 2.7–3.6 V; includes CFI but no VPP acceleration; different sector map (64 × 64 KB + 8 × 8 KB) | Hardlock not supported; WP pin only enables basic sector lock; no protection register | Prefer when migrating legacy designs using Macronix toolchains and requiring pin-compatible replacement |
Compared with SST39VF3201C-70-4C-EKE and MX29LV320ETTI-70G, the AT49BV320DT-70CU uniquely combines VPP-accelerated programming, dual-mode sector locking, and factory-sealed protection register - making it the only option among the three qualified for secure, field-upgradable embedded systems requiring certified data integrity.
Availability
AT49BV320DT-70CU is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and medical electronics requiring stable component supply, long-lifecycle support, and verified flash endurance specifications.
Supply support for AT49BV320DT-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 acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT49BV series. The company specializes in secure, reliable microcontrollers and memory solutions for industrial and automotive markets.
The AT49BV320DT-70CU belongs to Atmel's legacy parallel Flash memory product line, engineered specifically for embedded systems demanding robust in-system programmability, sector-level data security, and extended temperature operation without external high-voltage generators.
FAQ
What is the maximum operating temperature range for the AT49BV320DT-70CU?
The AT49BV320DT-70CU is rated for industrial temperature operation from –40°C to +85°C. Absolute maximum ratings extend to +125°C under bias, but functional specification compliance (including 70 ns access time and 100,000 erase cycles) is guaranteed only within the –40°C to +85°C range per the official datasheet revision 3581D–FLASH–2/06.
Does the AT49BV320DT-70CU require an external high-voltage generator for programming?
No. The AT49BV320DT-70CU uses internal charge pumps and requires only a single 2.65–3.6 V supply for standard programming. The VPP pin accepts 0–10 V: below 0.4 V it inhibits programming; at ≥1.65 V it enables normal operations; at 10 V it accelerates dual-word programming - but external high-voltage generation is optional, not mandatory, for basic functionality.
How does the Hardlock protection mode interact with the WP pin on the AT49BV320DT-70CU?
On the AT49BV320DT-70CU, Hardlock protection is enabled per sector via software command, but its enforcement depends on WP pin state: when WP = low, Hardlocked sectors are permanently read-only until reset; when WP = high, Hardlock is overridden and sectors can be unlocked via command. This dual-gate mechanism prevents accidental override in powered systems while allowing service-mode reprogramming.
Can the AT49BV320DT-70CU be used in a 5 V system interface?
Yes - the AT49BV320DT-70CU supports 0–5.5 V input tolerance on address and control pins (A0–A20, CE, OE, WE, RESET, WP), enabling direct connection to 5 V microcontrollers without level shifters. However, I/O lines are limited to 0–(VCCQ + 0.6 V), and VCCQ must be tied to VCC (2.65–3.6 V), so 5 V I/O driving is not permitted.
What command sequence enters CFI Query mode on the AT49BV320DT-70CU?
The AT49BV320DT-70CU enters CFI Query mode by writing data byte 0x98 to any address in a single bus cycle - no address setup or follow-up commands required. Once entered, CFI data (vendor ID, device geometry, timing parameters) is readable at fixed offsets (e.g., 0x10, 0x12, 0x27) until the Read command (0xFF) exits the mode.
AT49BV320DT-70CU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 47-VFBGA, CSBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 32Mbit
- Memory Organization:
- 2M 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:
- 47-CBGA (7x10)
AT49BV320DT-70CU FAQ
1.How can I place an order for AT49BV320DT-70CU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV320DT-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 AT49BV320DT-70CU reliable?
The price and inventory of AT49BV320DT-70CU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV320DT-70CU is usually 5 days.
3.What payment methods are accepted for AT49BV320DT-70CU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV320DT-70CU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV320DT-70CU?
AT49BV320DT-70CU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV320DT-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 AT49BV320DT-70CU?
For technical support, including AT49BV320DT-70CU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV320DT-70CU requirements.
6.How does Aetrix verify that AT49BV320DT-70CU is sourced from the original manufacturer or authorized distributors?
All AT49BV320DT-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 AT49BV320DT-70CU meets industry standards.
7.What is the process for return or replacement of AT49BV320DT-70CU?
All AT49BV320DT-70CU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV320DT-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 AT49BV320DT-70CU part is unused and in its original packaging.
Return procedure for AT49BV320DT-70CU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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