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Microchip Technology AT49BV320DT-70TU
- Part No.:
- AT49BV320DT-70TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV320DT-70TU.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV320DT-70TU from Microchip Technology (formerly Atmel) is a 32-Mbit (2M × 16) single-supply Flash memory IC designed for embedded code storage and data logging in microcontroller-based systems. 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 Erase/Program Suspend for concurrent read/program operations - enabling real-time firmware updates in industrial controllers.
For engineers reviewing the AT49BV320DT-70TU datasheet, AT49BV320DT-70TU pinout, AT49BV320DT-70TU application, or AT49BV320DT-70TU equivalent, key selection considerations include TSOP-48 package compatibility, CFI-compliant configuration querying, flexible Softlock/Hardlock sector protection, VPP-assisted accelerated programming, and 100,000-cycle endurance for field-upgradable firmware storage.
Technical Context
The AT49BV320DT-70TU implements a command-driven Write State Machine (WSM) architecture with dual-bus-cycle programming and sector erase commands. Its status register (I/O7–I/O0) provides real-time WSM busy/ready indication (SR7), program/erase error flags (SR4/SR5), suspend status (SR2/SR6), and VPP-level validation (SR3).
It integrates hardware data protection including VCC sense (<1.8 V inhibit), 10 ms power-on delay, and VPP-dependent program enablement (VPP < 0.4 V blocks all writes; ≥1.65 V enables standard operation; 9.5–10.0 V enables Dual-word Program). The device supports Common Flash Interface (CFI) query mode via 98h command for runtime parameter discovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit words) - supports full firmware images for mid-range MCUs without external memory expansion. |
| Access Time | 70 ns - enables direct execution (XIP) from flash in systems with ≤14 MHz bus timing budgets. |
| Supply Voltage | 2.65–3.6 V - compatible with 3.3 V I/O domains and eliminates need for separate 5 V rails in modern embedded designs. |
| Erase Architecture | 71 sectors: 63 × 64 KB + 8 × 8 KB - allows granular firmware partitioning (e.g., bootloader, app, config) with independent lock/unlock control. |
| Endurance | 100,000 erase cycles per sector - supports frequent field updates in telemetry gateways and programmable logic controllers. |
| Program Time | 10 µs per word - reduces firmware patch latency; Dual-word Program (with VPP = 10 V) further halves effective write time for aligned addresses. |
| Suspend Capability | Erase Suspend & Program Suspend - permits reading active firmware while background erasing a non-active sector, critical for zero-downtime OTA updates. |
| Protection Register | 128-bit (64-bit factory + 64-bit user) - enables secure boot key storage with user-sector lockout to prevent tampering of cryptographic credentials. |
Pinout & Package
AT49BV320DT-70TU is available in a 48-lead TSOP-I (Type 1) package with 0.5 mm pitch, compliant with JEDEC MO-141AC. Pin 1 is marked by a beveled corner; pins are numbered counterclockwise from top-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2M-word addressing; A0–A1 select byte within 16-bit word for Dual-word Program. |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel interface; outputs driven to VCCQ − 0.1 V; inputs tolerate 0–5.5 V for mixed-voltage system interfacing. |
| CE, OE, WE | Chip/Output/Write Enable | Three independent controls prevent bus contention; OE/CE high places outputs in high-Z state during standby or multi-device sharing. |
| VPP | Program/Erase Voltage Control | Enables write operations only when ≥1.65 V; 10 V input accelerates Dual-word Program; <0.4 V disables all writes for hardware lockout. |
| WP | Sector Protection Override | When low, enforces Hardlock protection; when high, allows software unlock of Hardlocked sectors - enables secure yet recoverable field updates. |
| RESET | Hardware Initialization | Pulls outputs to high-Z and forces read mode on rising edge - synchronizes flash state with MCU reset sequence without software intervention. |
| VCCQ | Output Driver Supply | Separate 2.65–3.6 V rail for I/O drivers; decoupling required to maintain VOH ≥ VCCQ − 0.1 V under load. |
| NC | No Connect | Pin 9 (TSOP) is unconnected - must remain floating; no internal bonding or function. |
Key Features
| Feature | Design Value |
|---|---|
| CFI Query Support | Enables runtime detection of device geometry, timing parameters, and command set via standardized 98h entry - simplifies BSP portability across flash vendors. |
| Erase Suspend/Resume | Halts active sector erase within 15 µs to allow immediate read/program from other sectors - essential for deterministic interrupt response during firmware update. |
| Softlock/Hardlock Protection | Two-tier sector locking: Softlock allows dynamic unlock via command; Hardlock requires WP=low for permanent read-only enforcement - supports bootloader integrity and field-configurable partitions. |
| 128-bit Protection Register | Factory-programmed 64-bit ID + user-writable 64-bit lockable space - provides hardware-rooted identity and secure credential storage for TLS certificate provisioning. |
| Low-Power Operation | 10 mA active current and 15 µA standby draw - extends battery life in always-on IoT edge nodes where flash remains powered between wake cycles. |
| Green Packaging | Pb/Halide-free TSOP-48 construction - meets RoHS 2011/65/EU and REACH SVHC compliance for global industrial equipment shipments. |
Applications
| Industrial PLC Firmware Storage | Automotive Telematics Bootloader |
|---|---|
Use Scenario: Storing and updating ladder logic programs and I/O configuration tables in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Non-volatile code storage with in-system reprogrammability; 70 ns access enables direct execution from flash without SRAM shadowing. Use Value: Sector Erase Architecture isolates bootloader (SA0–SA7) from application (SA8–SA70), allowing safe over-the-air updates without risking brickage. | Use Scenario: Hosting secure bootloader and vehicle-specific calibration data in telematics control units requiring ASIL-B functional safety alignment. IC Role / Device Role / Timing Role: Trusted firmware root-of-trust anchor; 128-bit protection register stores asymmetric key material with hardware-enforced write lock. Use Value: Hardlock + WP pin integration prevents unauthorized firmware modification during vehicle service, meeting UNECE R155 cybersecurity management system requirements. |
| Medical Device Configuration Memory | Network Router Feature Licensing |
Use Scenario: Retaining FDA-cleared operational parameters, calibration offsets, and audit logs in portable diagnostic imaging equipment with battery-backed operation. IC Role / Device Role / Timing Role: High-reliability data logger; 100,000-cycle endurance ensures >10 years of daily recalibration cycles at 200 writes/year. Use Value: Program Suspend allows real-time patient data capture (via I/O reads) while background-writing new calibration coefficients - eliminating acquisition gaps. | Use Scenario: Enabling feature-tier licensing (e.g., firewall, QoS, VPN) in enterprise-grade SOHO routers via encrypted license keys stored in protected sectors. IC Role / Device Role / Timing Role: Secure license vault; CFI interface allows bootloader to validate flash vendor, density, and timing before decrypting license payloads. Use Value: Softlock protection permits remote license activation/deactivation via firmware commands without physical access or PCB rework. |
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, 3.0–3.6 V supply; lacks VPP pin and Dual-word Program; uses different command set (no CFI). | No hardware-accelerated programming; no suspend/resume; requires custom driver adaptation due to non-CFI interface. | Select when cost sensitivity outweighs need for field update flexibility and standardized configuration discovery. |
| MX29LV320ETTI-70G | 32 Mbit, 70 ns, 3.0–3.6 V; includes CFI and suspend/resume but no VPP pin; 100,000-cycle rating same. | Relies solely on software-controlled voltage scaling for program acceleration; lacks hardware VPP lockout for enhanced security. | Choose for CFI-compliant systems needing suspend capability but where VPP-based hardware write inhibition is not required. |
Compared with SST39VF3201-70-4C-EKE and MX29LV320ETTI-70G, the AT49BV320DT-70TU uniquely combines VPP-enabled hardware write protection, Dual-word Program acceleration, and full CFI support - making it optimal for safety-critical, field-upgradable, and vendor-portable embedded firmware storage.
Availability
AT49BV320DT-70TU is available at Aetrix Electronics and suitable for industrial PLCs, automotive telematics modules, medical diagnostics equipment, and network infrastructure devices requiring stable component supply across extended product lifecycles.
Supply support for AT49BV320DT-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 AT49BV320D(T) family.
The AT49BV320D(T) series was designed specifically for embedded systems requiring robust, in-system programmable non-volatile memory with sector-level security and real-time update capabilities - targeting industrial control, automotive, and medical markets prior to NAND/NOR consolidation trends.
FAQ
What is the maximum operating temperature range for the AT49BV320DT-70TU?
The AT49BV320DT-70TU is rated for operation from –40°C to +85°C ambient temperature. Its absolute maximum junction temperature is +125°C, and storage temperature range extends from –65°C to +150°C. These ratings align with industrial-grade requirements and are validated per JEDEC JESD22-A108F testing protocols.
Does the AT49BV320DT-70TU support true 3.3 V-only operation without VPP voltage boosting?
Yes, the AT49BV320DT-70TU supports full read, program, and erase functionality at 3.3 V with VPP ≥1.65 V - no external 10 V supply is required. The VPP pin serves dual roles: enabling standard operations at ≥1.65 V and accelerating Dual-word Program only when raised to 9.5–10.0 V. For most applications, tying VPP to VCC suffices.
How does the AT49BV320DT-70TU handle simultaneous read and program operations?
The AT49BV320DT-70TU uses Program Suspend to pause an active word program operation within 20 µs, allowing immediate reads from any other word in the array. After reading, Program Resume restores the suspended write. This avoids bus contention and enables deterministic response to interrupts during firmware updates - a capability confirmed in Section 4.10 of the datasheet.
Can the AT49BV320DT-70TU be used as a drop-in replacement for the AT49BV320D-70TU?
Yes, the AT49BV320DT-70TU is functionally and pin-compatible with the AT49BV320D-70TU. Both share identical TSOP-48 pinout, command set, timing parameters, and electrical specifications. The "T" suffix denotes the same device revision with updated packaging compliance (Pb/Halide-free), and no design changes affect interoperability.
What happens if the VPP pin is left unconnected on the AT49BV320DT-70TU?
The VPP pin must never be left floating on the AT49BV320DT-70TU. An unconnected VPP defaults to an indeterminate voltage level, which may fall below 0.4 V and permanently inhibit all program and erase operations. Per Section 4.6, VPP must be tied to a defined voltage - typically VCC (3.3 V) for standard operation or 10 V for accelerated programming.
AT49BV320DT-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:
- 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 FAQ
1.How can I place an order for AT49BV320DT-70TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV320DT-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 AT49BV320DT-70TU reliable?
The price and inventory of AT49BV320DT-70TU 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 is usually 5 days.
3.What payment methods are accepted for AT49BV320DT-70TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV320DT-70TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV320DT-70TU?
AT49BV320DT-70TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV320DT-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 AT49BV320DT-70TU?
For technical support, including AT49BV320DT-70TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV320DT-70TU requirements.
6.How does Aetrix verify that AT49BV320DT-70TU is sourced from the original manufacturer or authorized distributors?
All AT49BV320DT-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 AT49BV320DT-70TU meets industry standards.
7.What is the process for return or replacement of AT49BV320DT-70TU?
All AT49BV320DT-70TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV320DT-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 AT49BV320DT-70TU part is unused and in its original packaging.
Return procedure for AT49BV320DT-70TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV320DT-70TU Tags
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