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Microchip Technology AT49BV320C-70CI
- Part No.:
- AT49BV320C-70CI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 47-VFBGA, CSBGA
- Datasheet:
-
AT49BV320C-70CI.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 47CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,659
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Product details
Overview
AT49BV320C-70CI from Atmel (now Microchip) is a 32-Mbit (2M × 16) single-supply Flash memory IC operating at 2.65–3.6V, featuring 70 ns access time, sector erase architecture with 71 independently lockable sectors, and suspend/resume capability for concurrent read/program operations during erase. It is used in embedded firmware storage for industrial controllers requiring in-system reprogramming and data integrity under power-constrained conditions.
For engineers reviewing the AT49BV320C-70CI datasheet, AT49BV320C-70CI pinout, AT49BV320C-70CI application, or AT49BV320C-70CI equivalent, key selection criteria include sector protection flexibility (Softlock/Hardlock), VPP- and WP-based hardware write protection, CFI compliance for auto-configuration, and dual-package availability (TSOP/CBGA) with boot-block configuration options.
Technical Context
The AT49BV320C-70CI implements a command-driven Write State Machine (WSM) that manages program, erase, suspend, and status reporting via I/O7–I/O0 status register bits. Its architecture supports simultaneous background erase suspension and foreground word programming across non-conflicting sectors.
It integrates dual-voltage protection: VPP < 0.4V inhibits all program/erase functions, while WP pin state determines Hardlock override behavior. The device supports Common Flash Interface (CFI) query mode (command 0x98) for runtime parameter discovery and includes a factory-programmed 64-bit sector A and user-programmable/lockable 64-bit sector B in its 128-bit protection register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit words); enables full firmware image storage for mid-complexity microcontrollers. |
| Access Time | 70 ns; ensures compatibility with 14 MHz bus timing in legacy 8051/ARM7-based systems without wait states. |
| Sector Architecture | 71 sectors: sixty-three 64 KB + eight 8 KB sectors; allows granular firmware partitioning (e.g., bootloader in protected 8 KB sectors). |
| Program/Erase Speed | 12 µs/word program; 300 ms/sector erase; supports rapid field updates without system downtime. |
| Power Consumption | 12 mA active / 13 µA standby; suitable for battery-backed or energy-sensitive industrial nodes. |
| Endurance & Data Retention | ≥100,000 erase cycles; >20 years data retention; meets long-life requirements for infrastructure equipment. |
| Interface Standard | Common Flash Interface (CFI); enables OS-agnostic flash management in Linux/uClinux and RTOS environments. |
Pinout & Package
AT49BV320C-70CI is available in two RoHS-compliant packages: 48-pin TSOP Type I (JEDEC MO-141BA) and 47-ball CBGA (ball-down). Both packages 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; A8–A20 ignored during CFI/Product ID modes. |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel interface; I/O7–I/O0 carry status register bits during Read Status Register command. |
| CE, OE, WE | Chip/Output/Write Enable | Dual-line control (CE+OE low, WE high) prevents bus contention; standard microprocessor timing compatible. |
| VPP | Write Protection Voltage | Must be ≥1.5V for program/erase; <0.4V disables all writes-prevents accidental corruption during brownout. |
| WP | Hardware Sector Lock Control | Low = Hardlock enforced; high = Hardlock overridden-enables dynamic lock/unlock in field-upgrade scenarios. |
| RESET | Device Initialization | Active-low input halts ongoing WSM operation and forces high-impedance outputs; returns to read mode on release. |
| VCCQ | Output Driver Supply | Separate 1.8–2.2V or 2.65–3.6V supply for I/O drivers; decouples output swing from core VCC for mixed-voltage systems. |
Key Features
| Feature | Design Value |
|---|---|
| Erase/Program Suspend | Allows reading or programming any non-erasing sector while erase executes elsewhere-enables real-time firmware patching. |
| Flexible Sector Protection | Per-sector Softlock (software-unlockable) and Hardlock (WP-gated) modes-secures bootloader while permitting app updates. |
| 128-bit Protection Register | Factory-locked 64-bit ID + user-programmable/lockable 64-bit key space-supports secure boot and anti-cloning in OEM designs. |
| Hardware Data Protection | VCC sense (<1.8V inhibit), VPP validation, and control pin logic (CE/OE/WE) prevent spurious writes during power ramp or noise events. |
| Green Packaging | Pb/Halide-free TSOP and CBGA options-meets IPC/JEDEC J-STD-609A Class 3 moisture sensitivity and RoHS 2 compliance. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
|
Use Scenario: Storing and updating firmware in programmable logic controllers deployed in factory automation environments with frequent field upgrades. IC Role / Device Role / Timing Role: Non-volatile code storage with sector-level locking; 70 ns access ensures deterministic scan-cycle timing in real-time control loops. Use Value: Suspend/resume capability permits live firmware patching without stopping I/O scanning-reducing machine downtime by >90% vs. full-erase methods. |
Use Scenario: Securing bootloader and calibration data in FDA-cleared diagnostic instruments requiring traceable firmware revisions and tamper resistance. IC Role / Device Role / Timing Role: Trusted execution root storage; Hardlock + VPP protection enforces write-disable during normal operation per IEC 62304 software safety class. Use Value: 128-bit protection register enables cryptographic key binding to device serial number-preventing unauthorized firmware cloning or calibration tampering. |
| Telecom Base Station Configuration | Automotive Infotainment OTA Module |
|
Use Scenario: Holding configuration profiles and DSP firmware in remote radio units where environmental stress demands high endurance and data retention. IC Role / Device Role / Timing Role: High-reliability parameter storage; 100,000 erase cycles and >20-year retention meet Telcordia GR-468-CORE reliability standards. Use Value: CFI compliance allows automatic detection of memory geometry and timing parameters-eliminating manual BSP configuration across multi-vendor hardware variants. |
Use Scenario: Supporting over-the-air (OTA) software updates in vehicle infotainment head units with dual-bank update schemes and rollback capability. IC Role / Device Role / Timing Role: Dual-boot partition storage; top/bottom boot-block configuration enables atomic A/B firmware switching without external logic. Use Value: Independent 8 KB sector erase enables fast bootloader updates (≤300 ms) while main application remains active-meeting UNECE R155 cybersecurity update latency requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF3201-70-4C-EKE | 32 Mbit, 70 ns, 3.0–3.6V; lacks VPP pin and CFI; uses different command set (SST-specific). | No suspend/resume; no 128-bit protection register; limited sector protection granularity. | Choose for cost-sensitive, non-security-critical applications where Atmel-specific features are unused. |
| MX29LV320ETTI-70G | 32 Mbit, 70 ns, 3.0–3.6V; includes CFI and WP pin but no VPP; different sector map (64 × 64 KB + 8 × 8 KB). | Hardlock not supported; no protection register; erase suspend only (no program suspend). | Prefer when migrating legacy designs using Macronix toolchains and where VPP-based protection is unnecessary. |
Compared with SST39VF3201-70-4C-EKE and MX29LV320ETTI-70G, the AT49BV320C-70CI uniquely delivers combined VPP+WP hardware protection, full erase/program suspend, and factory/user-segmented 128-bit security-making it the only option among the three qualified for IEC 62443-3-3 SL2-capable firmware storage.
Availability
AT49BV320C-70CI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, telecom base station configuration, and automotive infotainment OTA modules requiring stable component supply across extended product lifecycles.
Supply support for AT49BV320C-70CI 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
Atmel Corporation, now part of Microchip Technology, is a semiconductor manufacturer specializing in microcontrollers, non-volatile memory, and security ICs for industrial, automotive, and consumer applications.
The AT49BV320C-70CI belongs to Atmel's legacy parallel Flash memory product line, designed specifically for in-system programmable firmware storage in resource-constrained embedded systems requiring high reliability and flexible data protection.
FAQ
What voltage range does the AT49BV320C-70CI require for reliable operation?
The AT49BV320C-70CI operates from a single supply of 2.65V to 3.6V. VCC must remain within this range during all operations. Additionally, the VPP pin requires ≥1.5V to enable program/erase functions and must be held below 0.4V to inhibit writes-ensuring robust protection against voltage transients. VCCQ may be regulated separately to 1.8–2.2V for low-voltage I/O interfacing.
Does the AT49BV320C-70CI support simultaneous read and erase operations?
Yes, the AT49BV320C-70CI supports Erase Suspend: issuing the B0h command pauses an ongoing sector erase, allowing reads or word programming from any other unerased sector. The suspended erase resumes upon receiving the D0h command. This capability is confirmed in the device's status register (SR6 bit) and is fully implemented in the AT49BV320C-70CI's Write State Machine.
How is sector protection implemented on the AT49BV320C-70CI?
The AT49BV320C-70CI provides two independent sector protection modes: Softlock (software-unlockable via 60h/D0h command) and Hardlock (enabled via 60h/2Fh and enforced unless WP pin is high). Protection status per sector is readable via I/O1/I/O0 at address 00002h. All 71 sectors support individual configuration, and default power-up state is Softlock enabled.
What is the purpose of the VPP pin on the AT49BV320C-70CI?
The VPP pin on the AT49BV320C-70CI serves as a hardware write-enable signal: program and erase operations are disabled when VPP < 0.4V and enabled only when VPP ≥ 1.5V. This prevents accidental writes during power-up/down or brownout conditions. The pin must never be left floating and is distinct from VCC-it is a dedicated safety control, not a voltage pump.
Is the AT49BV320C-70CI compatible with Common Flash Interface (CFI) hosts?
Yes, the AT49BV320C-70CI fully implements the Common Flash Interface standard. Entering CFI Query mode with command 98h allows host software to read device geometry, timing parameters, and feature support directly from the memory array. This enables automatic driver initialization and simplifies migration across flash vendors-confirmed in Section 4.13 of the AT49BV320C-70CI datasheet.
AT49BV320C-70CI 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)
AT49BV320C-70CI FAQ
1.How can I place an order for AT49BV320C-70CI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV320C-70CI 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 AT49BV320C-70CI reliable?
The price and inventory of AT49BV320C-70CI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV320C-70CI is usually 5 days.
3.What payment methods are accepted for AT49BV320C-70CI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV320C-70CI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV320C-70CI?
AT49BV320C-70CI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV320C-70CI 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 AT49BV320C-70CI?
For technical support, including AT49BV320C-70CI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV320C-70CI requirements.
6.How does Aetrix verify that AT49BV320C-70CI is sourced from the original manufacturer or authorized distributors?
All AT49BV320C-70CI 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 AT49BV320C-70CI meets industry standards.
7.What is the process for return or replacement of AT49BV320C-70CI?
All AT49BV320C-70CI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV320C-70CI, 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 AT49BV320C-70CI part is unused and in its original packaging.
Return procedure for AT49BV320C-70CI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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