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Microchip Technology AT49BV320DT-70TU-T
- Part No.:
- AT49BV320DT-70TU-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV320DT-70TU-T.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,603
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Product details
Overview
AT49BV320DT-70TU-T from Microchip Technology (formerly Atmel) is a 32-Mbit (2M × 16) single-supply Flash memory IC with 70 ns access time, sector erase architecture (63 × 64 KB + 8 × 8 KB sectors), 10 µs word program time, and suspend/resume capability for concurrent read/program during erase. It supports in-system programming in embedded microcontroller boot code storage applications.
For engineers reviewing the AT49BV320DT-70TU-T datasheet, AT49BV320DT-70TU-T pinout, AT49BV320DT-70TU-T application, or AT49BV320DT-70TU-T equivalent, key selection criteria include TSOP-48 package compatibility, VPP-assisted accelerated programming, CFI-compliant configuration querying, flexible Softlock/Hardlock sector protection, and 100,000 erase cycle endurance.
Technical Context
This parallel-interface NOR Flash implements a Write State Machine (WSM) that automates program and erase sequences using command-based protocols over standard microprocessor bus timing. It features dual-voltage operation: core logic runs at 2.65–3.6 V while VPP enables write protection (≤0.4 V) or accelerated dual-word programming (10.0 V).
The device integrates a 128-bit protection register (factory-programmed Sector A + user-programmable locked Sector B), Common Flash Interface (CFI) query mode (entry via 98h), and hardware data protection including VCC sense, power-on delay, and input-level tolerance up to 5.5 V on address/control pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit words) - supports full boot image storage for mid-range MCUs. |
| Access Time | 70 ns - meets real-time firmware fetch latency requirements in 20–25 MHz bus systems. |
| Supply Voltage | 2.65 V to 3.6 V - compatible with 3.3 V system rails without level-shifting. |
| Word Program Time | 10 µs - enables rapid field firmware updates with minimal host CPU intervention. |
| Sector Erase Time | 100 ms per sector - predictable timing for wear-leveling algorithms. |
| Erase Endurance | 100,000 cycles - qualifies for industrial logging and infrequent configuration update use cases. |
| Operating Temperature | −40°C to +85°C - rated for extended industrial ambient environments. |
| Package | 48-pin TSOP Type I (12 mm × 20 mm) - surface-mount compatible with standard reflow profiles. |
Pinout & Package
AT49BV320DT-70TU-T is packaged in a 48-lead Thin Small Outline Package (TSOP Type I, 12 mm × 20 mm, 0.5 mm pitch). Pin functions are electrically defined and validated per Microchip datasheet 3581D–FLASH–2/06.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2M-word addressing; A0–A7 used for command decoding. |
| I/O0–I/O15 | Data Bus | 16-bit bidirectional data path; status register bits output on I/O7–I/O0 during Read Status Register mode. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read operations to avoid bus contention. |
| OE | Output Enable | Active-low output control; toggling CE or OE latches status register contents on falling edge. |
| WE | Write Enable | Active-low write strobe; rising edge latches command/data during program/erase sequences. |
| VPP | Program/Erase Voltage Control | Enables write protection (VPP < 0.4 V), normal operation (≥1.65 V), or accelerated dual-word programming (10.0 V). |
| WP | Hardware Write Protect | Controls Hardlock override: WP = low locks protected sectors permanently; WP = high allows unlock command execution. |
| RESET | Device Initialization | Active-low reset halts ongoing operations and forces return to read mode on deassertion. |
| VCCQ | Output Driver Supply | Must be tied to VCC to ensure VOH ≥ VCC − 0.1 V for 16-bit bus signal integrity. |
| NC | No Connect | Pin 9 is unconnected; no internal bonding or electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Suspend/Resume for Erase & Program | Allows reading or programming any non-erasing sector while erase executes - enables real-time interrupt handling during firmware updates. |
| Flexible Sector Protection | Independent Softlock (software-unlockable) and Hardlock (WP-gated) modes per sector - secures bootloader while permitting runtime parameter updates. |
| Common Flash Interface (CFI) | Standardized query structure accessible via 98h command - enables automatic driver initialization and multi-vendor flash abstraction in BSPs. |
| 128-bit Protection Register | Factory-programmed 64-bit ID + user-writable/lockable 64-bit sector - supports secure key storage and anti-cloning in embedded devices. |
| Green Packaging | Pb/Halide-free TSOP-48 - complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3. |
Applications
| Boot Code Storage | Firmware Update Storage |
|---|---|
Use Scenario: Storing primary bootloader and initial firmware image for ARM Cortex-M or Renesas RX microcontrollers. IC Role / Device Role / Timing Role: Nonvolatile memory mapped directly to MCU address space; provides deterministic 70 ns instruction fetch timing. Use Value: Enables reliable cold-start execution without external configuration; sector lock prevents accidental corruption of critical boot code. | Use Scenario: Holding field-upgradable application firmware images in industrial PLCs or medical diagnostic equipment. IC Role / Device Role / Timing Role: Dual-bank capable storage where one sector hosts active firmware while another receives new version via CAN/USB. Use Value: Suspend/resume allows background download and verification without halting real-time control loops. |
| Configuration Parameter Storage | Secure Device Identity Storage |
Use Scenario: Retaining calibrated sensor offsets, network MAC addresses, and calibration coefficients across power cycles in test equipment. IC Role / Device Role / Timing Role: Byte-addressable parallel Flash accessed via GPIO-banged or dedicated memory interface. Use Value: Individual 8 KB sector locking isolates sensitive parameters from application code updates, reducing risk of misconfiguration. | Use Scenario: Embedding unique device identifiers and cryptographic keys in IoT edge nodes requiring tamper-resistant identity binding. IC Role / Device Role / Timing Role: 128-bit protection register (64-bit factory ID + 64-bit user-lockable sector) accessed via CFI-compatible commands. Use Value: Factory-programmed Sector A ensures unclonable root-of-trust; user-locked Sector B prevents key extraction post-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-70-4C-EKE | 32 Mbit, 70 ns, 3.0–3.6 V supply; lacks VPP pin and dual-word programming; no 128-bit protection register. | Supports basic boot code storage but offers no hardware-accelerated programming or factory-secured identity storage. | Select when cost sensitivity outweighs need for accelerated programming or secure key storage. |
| MX29LV320ETTI-70G | 32 Mbit, 70 ns, 2.7–3.6 V; includes CFI and sector protection, but no suspend/resume feature and no VPP-assisted acceleration. | Valid for firmware storage where concurrent read-during-erase is unnecessary and VPP-controlled security is not required. | Choose for drop-in replacement where existing board layout uses same TSOP-48 footprint and timing margins allow absence of suspend capability. |
Compared with SST39VF3201C-70-4C-EKE and MX29LV320ETTI-70G, AT49BV320DT-70TU-T uniquely delivers VPP-gated accelerated programming, full erase/program suspend/resume, and a factory-programmed 64-bit identity sector - making it suitable for secure, real-time updatable embedded systems where reliability and feature completeness are prioritized over lowest unit cost.
Availability
AT49BV320DT-70TU-T is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, and automotive body electronics requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT49BV320DT-70TU-T 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 Inc. is a leading provider of microcontroller, analog, FPGA, and memory solutions, acquired Atmel in 2016 and maintains legacy Flash product support and documentation.
The AT49BV320DT-70TU-T belongs to Microchip's legacy parallel NOR Flash product line, designed specifically for embedded systems requiring deterministic boot code execution, in-system reprogrammability, and hardware-enforced sector protection in industrial and automotive environments.
FAQ
What is the maximum operating temperature range for the AT49BV320DT-70TU-T?
The AT49BV320DT-70TU-T is specified for industrial operation from −40°C to +85°C. This range is validated per Microchip datasheet 3581D–FLASH–2/06 and applies to all guaranteed timing parameters including 70 ns access time and 10 µs word program time. Operation outside this range may result in undefined behavior or reduced endurance.
Does the AT49BV320DT-70TU-T support true concurrent read-while-erase functionality?
Yes, the AT49BV320DT-70TU-T supports Erase Suspend: issuing the B0h command pauses an active sector erase, allowing reads or word programming from any other unerased sector within the same AT49BV320DT-70TU-T device. The suspended erase resumes only upon receipt of the D0h Erase Resume command.
How is sector protection implemented on the AT49BV320DT-70TU-T?
The AT49BV320DT-70TU-T implements two independent sector protection modes: Softlock (software-unlockable via 60h/D0h command) and Hardlock (hardware-gated by WP pin state). Each of the 71 sectors can be individually configured. At power-up, all sectors default to Softlock enabled, ensuring out-of-box data integrity.
What is the purpose of the VPP pin on the AT49BV320DT-70TU-T?
The VPP pin on the AT49BV320DT-70TU-T serves dual roles: it inhibits program/erase when below 0.4 V (hardware write protection), enables normal operations at ≥1.65 V, and accelerates dual-word programming when set to 10.0 V. VPP must never be left floating and requires stable voltage regulation per Microchip's layout guidelines.
Is the AT49BV320DT-70TU-T pin-compatible with other 48-pin TSOP Flash memories?
The AT49BV320DT-70TU-T uses standard TSOP Type I pinout (JEDEC MO-141AC) and shares identical mechanical dimensions and solder pad layout with SST39VF3201C-70-4C-EKE and MX29LV320ETTI-70G. However, electrical differences - particularly VPP dependency, command set, and status register mapping - require firmware validation before substitution.
AT49BV320DT-70TU-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 48-TSOP
AT49BV320DT-70TU-T FAQ
1.How can I place an order for AT49BV320DT-70TU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV320DT-70TU-T 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-70TU-T reliable?
The price and inventory of AT49BV320DT-70TU-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV320DT-70TU-T is usually 5 days.
3.What payment methods are accepted for AT49BV320DT-70TU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV320DT-70TU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV320DT-70TU-T?
AT49BV320DT-70TU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV320DT-70TU-T 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-70TU-T?
For technical support, including AT49BV320DT-70TU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV320DT-70TU-T requirements.
6.How does Aetrix verify that AT49BV320DT-70TU-T is sourced from the original manufacturer or authorized distributors?
All AT49BV320DT-70TU-T 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-70TU-T meets industry standards.
7.What is the process for return or replacement of AT49BV320DT-70TU-T?
All AT49BV320DT-70TU-T units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV320DT-70TU-T, 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-70TU-T part is unused and in its original packaging.
Return procedure for AT49BV320DT-70TU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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