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Microchip Technology AT49BV322A-70TU
- Part No.:
- AT49BV322A-70TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV322A-70TU.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,493
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Product details
Overview
AT49BV322A-70TU from Microchip Technology (formerly Atmel) is a 32-Mbit (2M × 16 / 4M × 8) single-supply Flash memory IC with 70 ns access time, sector erase architecture (63 × 64 KB + 8 × 8 KB), and suspend/resume capability for in-system programming. It operates from 2.65V to 3.6V and supports both byte and word data configurations via the BYTE pin.
For engineers reviewing the AT49BV322A-70TU datasheet, AT49BV322A-70TU pinout, AT49BV322A-70TU application, or AT49BV322A-70TU equivalent, key selection considerations include its TSOP-48/CBGA-48 dual-package support, Common Flash Interface (CFI) compliance, 128-bit protection register, sector lockdown feature, and hardware write protection via VPP pin.
Technical Context
The AT49BV322A-70TU implements a command-driven Flash architecture with CE/OE/WE control logic and READY/BUSY open-drain output. Its internal state machine handles embedded program/erase cycles, with status reporting via I/O2–I/O7 and RDY/BUSY.
It supports two operational modes: byte (I/O0–I/O7 active, I/O15 as A−1) and word (I/O0–I/O15 active), selected by the BYTE pin. Sector erase and chip erase are initiated via six-cycle software commands, while suspend/resume uses single-cycle commands (B0H/30H) with ≤15 µs suspend latency for erase and ≤20 µs for program operations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit or 4,194,304 × 8-bit) |
| Access Time | 70 ns - determines maximum read throughput in high-speed microcontroller boot or firmware storage applications |
| Supply Voltage | 2.65V to 3.6V - enables direct interface with 3.3V logic systems without level-shifting |
| Program Time | 12 µs per word - reduces firmware update duration during field reprogramming |
| Erase Time | 300 ms per sector - enables selective firmware partitioning with minimal downtime |
| Erase Cycles | ≥100,000 - ensures long-term reliability in industrial control and telecom equipment with frequent updates |
| Standby Current | 13 µA - supports low-power operation in battery-backed or energy-sensitive embedded systems |
Pinout & Package
AT49BV322A-70TU is available in 48-lead TSOP Type I (JEDEC MO-141BA) and 48-ball CBGA (ball-down) packages. Both packages share identical pin functions and signal mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 4M×8 or 2M×16 memory space; A−1 function on I/O15 in byte mode |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during multi-device sharing |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and programming |
| BYTE | Data Width Select | Logic high = 16-bit word mode (I/O0–I/O15); logic low = 8-bit byte mode (I/O0–I/O7 active) |
| VPP | Write Protection Voltage | Must be ≥0.9V for program/erase; <0.4V disables all write operations - critical for inadvertent-write prevention |
| RESET | Device Initialization | Active-low reset; halts ongoing operations and forces return to read/standby mode on release |
| RDY/BUSY | Status Output | Open-drain active-low signal indicating internal program/erase activity; supports wired-OR of multiple devices |
| I/O0–I/O14 | Data I/O | Bidirectional data bus; I/O15 serves as LSB address (A−1) in byte mode |
| NC | No Connect | Unbonded pin - must be left floating or tied to GND per board layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 71 independently lockable sectors (63 × 64 KB + 8 × 8 KB) enable granular firmware partitioning and secure boot code retention |
| Erase/Program Suspend | Allows real-time reading from non-suspending sectors during active erase/program - essential for interrupt-driven embedded systems |
| 128-bit Protection Register | Factory-programmed Block A + user-programmable/lockable Block B provides hardware-level security for device authentication or license keys |
| Common Flash Interface (CFI) | Standardized query table at address 0x55 (98h command) enables automatic driver detection and cross-vendor firmware compatibility |
| Hardware Data Protection | VCC sense, VPP validation, and control-line gating prevent spurious writes during power ramp-up or noise events |
Applications
| Industrial PLC Firmware Storage | Automotive Infotainment Boot Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers with periodic field upgrades. IC Role / Device Role / Timing Role: Non-volatile program storage with sector lockdown protecting bootloader and safety-critical routines. Use Value: Enables safe over-the-air updates without risking corruption of protected boot sectors, supported by 100,000+ erase cycles. | Use Scenario: Holding boot code and OS kernel for head-unit microcontrollers requiring fast, reliable startup after ignition. IC Role / Device Role / Timing Role: Primary x16 Flash memory mapped into CPU address space with 70 ns access ensuring sub-millisecond boot latency. Use Value: Dual-mode (byte/word) operation allows flexible integration with 8-bit or 16-bit bus architectures common in automotive SoCs. |
| Medical Diagnostic Equipment Configuration | Telecom Base Station FPGA Bitstream Storage |
Use Scenario: Retaining calibration tables and regulatory-compliant configuration profiles across power cycles in portable ultrasound devices. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage using 128-bit protection register and sector lockdown to meet IEC 62304 requirements. Use Value: Hardware-enforced write protection (VPP pin + lockdown) prevents unauthorized modification of certified calibration data. | Use Scenario: Storing FPGA configuration bitstreams for remote radio units requiring hot-swap reconfiguration without system reboot. IC Role / Device Role / Timing Role: High-reliability Flash memory interfaced via CFI-compliant drivers to support automatic bitstream validation and fallback loading. Use Value: CFI support enables standardized driver reuse across multiple FPGA platforms, reducing qualification effort for telecom OEMs. |
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 | 3.3V-only, 70 ns access, 32 Mbit (2M×16), same TSOP-48 package but no CFI support | Lacks CFI and suspend/resume features; requires custom driver development | Preferred when cost sensitivity outweighs need for standardized firmware abstraction layers |
| MX29LV320ETTI-70G | 3.0V–3.6V supply, 70 ns access, 32 Mbit (2M×16), supports CFI but no VPP pin or 128-bit protection register | Missing hardware write protection and secure register - unsuitable for regulated medical or defense use | Appropriate for consumer electronics where security and certification are not required |
Compared with SST39VF3201C-70-4C-EKE and MX29LV320ETTI-70G, the AT49BV322A-70TU uniquely combines CFI compliance, VPP-based hardware write protection, and a user-lockable 128-bit register - making it the only option among the three qualified for safety-critical, field-upgradable embedded systems requiring traceable firmware integrity.
Availability
AT49BV322A-70TU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive infotainment boot memory, and medical diagnostic equipment configuration requiring stable component supply and long-lifecycle support.
Supply support for AT49BV322A-70TU 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 legacy Atmel Flash products including the AT49BV322A-70TU.
The AT49BV322A-70TU belongs to Atmel's parallel-interface Flash memory product line, designed specifically for embedded systems requiring robust in-system programmability, sector-level data protection, and deterministic timing in 3.3V environments.
FAQ
What is the operating voltage range for the AT49BV322A-70TU?
The AT49BV322A-70TU operates from 2.65V to 3.6V. This single-supply range eliminates the need for separate VCC and VPP rails in most designs. The device incorporates VCC sense circuitry that inhibits programming if VCC drops below 1.8V (typical), and VPP must be ≥0.9V to enable erase/program functions. Operation outside this range may cause data corruption or permanent damage.
Does the AT49BV322A-70TU support both 8-bit and 16-bit data interfaces?
Yes, the AT49BV322A-70TU supports both configurations via the BYTE pin. When BYTE = HIGH, the device operates in 16-bit word mode with I/O0–I/O15 active. When BYTE = LOW, it operates in 8-bit byte mode with I/O0–I/O7 active and I/O15 repurposed as A−1 (LSB address). This flexibility allows seamless integration with 8-bit microcontrollers or 16-bit DSPs without external glue logic.
How does sector lockdown work on the AT49BV322A-70TU?
Sector lockdown on the AT49BV322A-70TU is enabled per-sector using a six-cycle software command (60H). Once locked, a sector becomes read-only - its contents cannot be erased or programmed until the next power cycle or RESET assertion. Lockdown status is verified by reading address 00002H within the sector: I/O0 = HIGH indicates lockdown active. This feature protects bootloader code while allowing application firmware updates in other sectors.
What methods does the AT49BV322A-70TU provide to detect end-of-program or end-of-erase?
The AT49BV322A-70TU offers three concurrent methods: (1) RDY/BUSY pin (open-drain active-low), (2) Data Polling (I/O7 toggles/complements during operation), and (3) Toggle Bit (I/O6 toggles during operation). All methods require checking I/O5 (erase/program status) and I/O3 (VPP status) to confirm successful completion. The configuration register (00/01) determines whether the device auto-returns to read mode or requires Product ID Exit command post-operation.
Is the AT49BV322A-70TU RoHS compliant and lead-free?
Yes, the AT49BV322A-70TU is offered in Green (Pb/Halide-free) packaging per JEDEC J-STD-609. The "TU" suffix denotes the TSOP-48 package variant with lead-free finish and matte tin plating. RoHS compliance is documented in Microchip's official part documentation and applies to both TSOP and CBGA package options of the AT49BV322A-70TU.
AT49BV322A-70TU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 32Mbit
- Memory Organization:
- 4M x 8, 2M x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 200µs
- 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-TSOP
AT49BV322A-70TU FAQ
1.How can I place an order for AT49BV322A-70TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV322A-70TU 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 AT49BV322A-70TU reliable?
The price and inventory of AT49BV322A-70TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV322A-70TU is usually 5 days.
3.What payment methods are accepted for AT49BV322A-70TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV322A-70TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV322A-70TU?
AT49BV322A-70TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV322A-70TU 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 AT49BV322A-70TU?
For technical support, including AT49BV322A-70TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV322A-70TU requirements.
6.How does Aetrix verify that AT49BV322A-70TU is sourced from the original manufacturer or authorized distributors?
All AT49BV322A-70TU 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 AT49BV322A-70TU meets industry standards.
7.What is the process for return or replacement of AT49BV322A-70TU?
All AT49BV322A-70TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV322A-70TU, 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 AT49BV322A-70TU part is unused and in its original packaging.
Return procedure for AT49BV322A-70TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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