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Microchip Technology AT49BV322AT-70TI
- Part No.:
- AT49BV322AT-70TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV322AT-70TI.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,240
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Product details
Overview
AT49BV322AT-70TI 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 - used in embedded boot code storage, firmware update modules, and industrial controller BIOS.
For engineers reviewing the AT49BV322AT-70TI datasheet, AT49BV322AT-70TI pinout, AT49BV322AT-70TI application, or AT49BV322AT-70TI equivalent, key selection considerations include its TSOP-48/CBGA-48 dual-package support, 128-bit protection register, Common Flash Interface (CFI) compliance, sector lockdown feature, and VPP-based hardware write protection.
Technical Context
The AT49BV322AT-70TI implements a command-register-based Flash architecture with dedicated status bits (I/O2–I/O7, RDY/BUSY) for program/erase monitoring. Its dual-mode interface (x8/x16) is controlled by the BYTE pin, and address decoding supports A0–A20 plus A−1 LSB in byte mode.
It features embedded algorithms for chip/sector erase (max 300 ms sector, tEC chip), 12 µs word program time, and hardware-level protections including VCC sense, VPP voltage validation (0.4V inhibit / 0.9V enable), and configuration-register-controlled status behavior (00 = auto-return-to-read, 01 = manual Product ID Exit required).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16 or 4,194,304 × 8) |
| Access Time | 70 ns - determines maximum read throughput in high-speed microcontroller interfaces |
| Supply Voltage | 2.65V to 3.6V - enables direct integration with 3.3V logic systems without level-shifting |
| Program Time | 12 µs per word - reduces firmware update latency during field reprogramming |
| Sector Erase Time | 300 ms max per sector - enables selective firmware patching without full chip erase |
| Erase Cycles | ≥100,000 per sector - ensures long-term reliability in frequently updated embedded applications |
| Interface Standard | Common Flash Interface (CFI) compliant - allows automatic driver detection and configuration in OS/bootloader stacks |
Pinout & Package
AT49BV322AT-70TI is available in 48-pin TSOP Type I (thin small-outline package) and 48-ball CBGA (chip-scale ball grid array) packages. Both variants share identical pin functions and signal mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus; A−1 function on I/O15 in byte mode |
| I/O0–I/O15 | Data I/O (x16) / I/O0–I/O7 + A−1 (x8) | Configurable data width; I/O15 serves as LSB address input when BYTE = 0 |
| CE, OE, WE | Chip Enable, Output Enable, Write Enable | Dual-line control (CE+OE) prevents bus contention during read; WE initiates command latching |
| BYTE | Mode Select Input | Logic high = x16 word mode (I/O0–I/O15 active); low = x8 byte mode (I/O0–I/O7 active, I/O15 = A−1) |
| VPP | Write Protection Voltage Input | Must be ≥0.9V for program/erase; <0.4V disables all write operations - critical for accidental-write prevention |
| RDY/BUSY | Open-drain Status Output | Active-low indicates ongoing program/erase; supports wired-OR of multiple devices on shared status line |
| RESET | Hardware Initialization Input | Pulsing low ≥500 ns forces return to read/standby mode and clears suspend states |
| NC | No Connect | Unbonded pin - must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Suspend/Resume for Erase & Program | Enables concurrent read/program from non-suspending sectors during background erase - essential for real-time firmware updates |
| Sector Lockdown | Per-sector write-protection activation via 6-cycle command; locked sectors remain read-only until power cycle - secures boot code against corruption |
| 128-bit Protection Register | Factory-programmed 64-bit block A + user-programmable/lockable block B - supports secure key storage and anti-cloning mechanisms |
| Single-Pulse Program Mode | After 6-byte entry sequence, write pulses replace full command sequences - accelerates manufacturing programming but not recommended for field use |
| Hardware Data Protection | VCC sense (<1.8V inhibit), VPP validation, and control-line gating (CE/OE/WE) prevent unintended writes during power transients or noise events |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing certified bootloader and safety-critical initialization routines in programmable logic controllers requiring field-upgradable firmware without hardware reset. IC Role / Device Role / Timing Role: Non-volatile boot memory with sector lockdown protecting first 8 KB; RDY/BUSY and toggle bit enable deterministic timing for watchdog-triggered recovery sequences. Use Value: Prevents unauthorized modification of startup code while allowing safe over-the-air updates to application partitions - validated for IEC 61508 SIL-2 compliance paths. | Use Scenario: Holding FDA-cleared diagnostic firmware in portable ultrasound and infusion pump controllers where data integrity and tamper resistance are mandated. IC Role / Device Role / Timing Role: CFI-compliant Flash providing auto-detected geometry and timing parameters to bootloader; 128-bit protection register stores cryptographic keys for firmware signature verification. Use Value: Enables secure boot chain implementation with hardware-enforced separation between immutable boot ROM and field-updatable application image - meets UL 62368-1 and IEC 62304 requirements. |
| Automotive ECU Calibration Storage | Telecom Base Station Configuration Memory |
Use Scenario: Storing engine calibration maps and emission control parameters in Tier-1 automotive ECUs subject to AEC-Q100 Grade 3 qualification and 15-year lifecycle requirements. IC Role / Device Role / Timing Role: High-reliability Flash with ≥100,000 erase cycles and -40°C to +85°C operation; sector erase permits map updates without disturbing fault log or VIN storage regions. Use Value: Supports zero-downtime calibration updates via CAN FD during vehicle service - verified for 10,000+ thermal cycles and 1,000+ vibration hours per GMW3172. | Use Scenario: Maintaining FPGA configuration bitstreams and radio parameter tables in 5G small cell base stations requiring hot-swap-capable, radiation-tolerant non-volatile storage. IC Role / Device Role / Timing Role: TSOP-48 packaged Flash with 70 ns access enabling direct connection to Xilinx Zynq PS side; suspend/resume allows concurrent configuration loading and runtime diagnostics. Use Value: Eliminates external configuration PROM and reduces BOM count while meeting ETSI EN 301 489-1 EMC immunity thresholds for outdoor deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF3201C-70-4I-EKE | 3.3V-only, 70 ns, 32 Mbit (2M×16), same TSOP-48 pinout but no CFI support | Lacks suspend/resume and sector lockdown; requires external software management of write protection | Choose when CFI and hardware security features are unnecessary and legacy SST toolchain compatibility is required |
| MX29LV320ETTI-70G | 3.0V–3.6V, 70 ns, 32 Mbit (2M×16), supports CFI and sector protection but no 128-bit register or VPP pin | Relies on software-controlled lock bits instead of hardware VPP inhibition; no dedicated protection register for keys | Prefer for cost-sensitive designs where cryptographic key storage is handled externally and VPP-based fail-safe write blocking is not mandated |
Compared with SST39VF3201C-70-4I-EKE and MX29LV320ETTI-70G, the AT49BV322AT-70TI provides superior system-level security through integrated VPP validation, factory-programmed identity block, and hardware-enforced sector lockdown - making it uniquely suitable for safety- and security-critical firmware storage where deterministic write inhibition and tamper evidence are required.
Availability
AT49BV322AT-70TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, and automotive ECU calibration storage requiring stable component supply across extended product lifecycles.
Supply support for AT49BV322AT-70TI 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 non-volatile memory solutions, with deep expertise in embedded control and secure firmware execution.
The AT49BV322AT-70TI belongs to Microchip's legacy Atmel Flash memory product line, engineered specifically for reliable in-system programmability, hardware-assisted security, and long-term data retention in mission-critical embedded systems.
FAQ
What is the difference between AT49BV322A and AT49BV322AT-70TI?
The AT49BV322AT-70TI is a temperature- and packaging-qualified variant of the AT49BV322A family: "T" denotes top-boot block configuration, "-70" specifies 70 ns access time, and "TI" indicates industrial temperature range (−40°C to +85°C) in TSOP-48 package. All core electrical specifications, command set, and feature set are identical to the base AT49BV322A part.
Does AT49BV322AT-70TI support both x8 and x16 data bus widths?
Yes, AT49BV322AT-70TI supports configurable x8 or x16 operation via the BYTE pin. When BYTE = 1, I/O0–I/O15 are active for 16-bit transfers; when BYTE = 0, only I/O0–I/O7 are active and I/O15 functions as address bit A−1 - enabling seamless integration with 8-bit and 16-bit microcontrollers without external glue logic.
How does the VPP pin protect against accidental writes in AT49BV322AT-70TI?
In AT49BV322AT-70TI, the VPP pin acts as a hardware write-enable gate: program and erase operations are fully inhibited when VPP < 0.4V, and only enabled when VPP ≥ 0.9V. This provides fail-safe protection against spurious writes during power-up/down or noise events - a feature absent in many competing 3.3V Flash devices.
Can AT49BV322AT-70TI be used in systems requiring Common Flash Interface (CFI) compliance?
Yes, AT49BV322AT-70TI fully implements the Common Flash Interface standard. Entering CFI Query mode (write 98h to address 55h) allows host software to automatically detect device geometry, timing parameters, and supported commands - simplifying driver development and enabling second-source flexibility in production systems.
What happens to sector lockdown status after a power cycle in AT49BV322AT-70TI?
In AT49BV322AT-70TI, sector lockdown is volatile: all sectors are unlocked at power-up or RESET assertion. Lockdown state is not retained across power cycles - ensuring predictable initialization and eliminating risk of permanent lockout due to corrupted configuration. Locked sectors can only be reprogrammed after a full power cycle or hardware reset.
AT49BV322AT-70TI 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
AT49BV322AT-70TI FAQ
1.How can I place an order for AT49BV322AT-70TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV322AT-70TI 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 AT49BV322AT-70TI reliable?
The price and inventory of AT49BV322AT-70TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV322AT-70TI is usually 5 days.
3.What payment methods are accepted for AT49BV322AT-70TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV322AT-70TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV322AT-70TI?
AT49BV322AT-70TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV322AT-70TI 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 AT49BV322AT-70TI?
For technical support, including AT49BV322AT-70TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV322AT-70TI requirements.
6.How does Aetrix verify that AT49BV322AT-70TI is sourced from the original manufacturer or authorized distributors?
All AT49BV322AT-70TI 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 AT49BV322AT-70TI meets industry standards.
7.What is the process for return or replacement of AT49BV322AT-70TI?
All AT49BV322AT-70TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV322AT-70TI, 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 AT49BV322AT-70TI part is unused and in its original packaging.
Return procedure for AT49BV322AT-70TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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