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Microchip Technology AT49BV320D-70TU-T
- Part No.:
- AT49BV320D-70TU-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV320D-70TU-T.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,190
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Product details
Overview
AT49BV320D-70TU-T from Microchip (formerly Atmel) is a 32-Mbit (2M × 16) single-supply Flash memory IC operating at 2.65–3.6 V, featuring 70 ns access time, sector erase architecture with 71 independently lockable sectors, and suspend/resume capability for concurrent read/program during erase. It is used in embedded systems requiring in-system reprogramming, such as industrial controllers and legacy communication modules.
For engineers reviewing the AT49BV320D-70TU-T datasheet, AT49BV320D-70TU-T pinout, AT49BV320D-70TU-T application, or AT49BV320D-70TU-T equivalent, key selection criteria include sector protection flexibility (Softlock/Hardlock), VPP-accelerated dual-word programming, CFI compliance for auto-configuration, and TSOP-48 package compatibility with legacy 16-bit bus interfaces.
Technical Context
The AT49BV320D-70TU-T 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 dual-bus-cycle command protocol requires precise CE/WE/OE timing and supports sector-level granularity - 63 × 64 KB + 8 × 8 KB - with individual write lockout per sector.
Hardware data protection includes VCC sense (<1.8 V inhibits programming), 10 ms power-on delay, and VPP voltage monitoring (VPPS bit in status register). The device supports CFI Query mode (98h command) to expose electrical/timing parameters and sector layout to host firmware, enabling runtime flash abstraction without hard-coded assumptions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 words × 16 bits), organized for 16-bit parallel bus interface |
| Access Time | 70 ns maximum - determines minimum bus cycle duration for reliable read operations |
| Supply Voltage | 2.65 V to 3.6 V - enables direct connection to 3.3 V logic rails without level shifting |
| Program Time | 10 µs per word - defines worst-case latency for firmware updates or configuration writes |
| Erase Time | 100 ms per sector - impacts field-upgrade duration and system responsiveness during flash maintenance |
| Erase Cycles | ≥100,000 per sector - specifies endurance for frequently updated firmware partitions |
| Standby Current | 15 µA - critical for battery-backed or low-power sleep modes in portable equipment |
Pinout & Package
AT49BV320D-70TU-T is packaged in a 48-pin TSOP Type I (Thin Small Outline Package) with 12 × 20 mm body size and 0.5 mm lead pitch. Pin functions are electrically identical across TSOP and CBGA variants, but only TSOP-48 applies to this specific -TU-T suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2M-word addressing; A0–A19 used for sector selection, A20 selects top/bottom boot block |
| I/O0–I/O15 | Data Bus | 16-bit bidirectional data path; outputs high-impedance when CE or OE is high to prevent bus contention |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access |
| OE | Output Enable | Active-low output control; toggling OE or CE latches status register contents on falling edge |
| WE | Write Enable | Active-low write strobe; rising edge latches command/data during program/erase sequences |
| VPP | Programming Voltage | Enables accelerated dual-word programming at 10.0 V; inhibits all write operations if <0.4 V |
| WP | Sector Write Protect | Hardware override for Hardlock mode: low = permanent sector lock, high = unlockable via software command |
| RESET | Device Initialization | Active-low reset halts ongoing operations and forces return to read mode on release |
Key Features
| Feature | Design Value |
|---|---|
| Suspend/Resume for Erase & Program | Allows reading or programming any non-erasing sector while erase runs - enables real-time firmware patching without halting system operation |
| Flexible Sector Protection | Independent Softlock (software-unlockable) and Hardlock (WP-pin-gated) per sector - supports secure bootloader + updatable application partitioning |
| Common Flash Interface (CFI) | Standardized query table accessible via 98h command - eliminates hardcoded flash drivers and enables multi-vendor BOM flexibility |
| 128-bit Protection Register | Factory-programmed 64-bit ID + user-writable 64-bit lockable sector - provides tamper-resistant device identity and secure key storage |
| Dual-word Programming | Accelerated 2-word parallel write when VPP = 10.0 V - reduces manufacturing programming time by ~50% vs. standard word programming |
Applications
| Industrial PLC Firmware Storage | Legacy Telecom Line Card Boot Code |
|---|---|
Use Scenario: Storing firmware images and configuration tables in programmable logic controllers deployed in factory automation environments with infrequent field updates. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector-level write lockout to protect bootloader and safety-critical routines from accidental overwrite. Use Value: 100,000 erase cycles and Hardlock protection ensure >10-year field reliability; 70 ns access meets deterministic scan-cycle timing requirements. | Use Scenario: Holding boot ROM and DSP microcode in TDM-based telecom line cards where space-constrained PCBs require TSOP packaging. IC Role / Device Role / Timing Role: Parallel 16-bit Flash memory mapped into CPU address space for zero-wait-state execution of initialization routines. Use Value: TSOP-48 footprint matches legacy board layouts; CFI support allows same driver stack across multiple flash vendors during component obsolescence management. |
| Medical Diagnostic Equipment Configuration | Automotive Body Control Module Calibration Data |
Use Scenario: Retaining calibration constants, sensor compensation tables, and regulatory audit logs in Class II medical imaging devices subject to IEC 62304 requirements. IC Role / Device Role / Timing Role: Secure parameter storage with 128-bit protection register for traceability and anti-tampering; Softlock enables safe field recalibration. Use Value: Sector-level locking prevents unauthorized modification of FDA-approved calibration data; suspend/resume avoids interrupting diagnostic scans during firmware patching. | Use Scenario: Storing vehicle-specific calibration maps (e.g., HVAC fan curves, lighting dimming profiles) in BCMs where EEPROM endurance is insufficient. IC Role / Device Role / Timing Role: High-endurance Flash memory used for infrequently updated but mission-critical configuration data outside main MCU flash. Use Value: 100,000-cycle rating exceeds automotive lifetime requirements; WP pin hardware lock prevents corruption during battery transients or ESD events. |
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 | 3.3 V-only supply (no 2.65 V min); lacks VPP acceleration and 128-bit protection register | Supports CFI and sector erase but no Hardlock/WP integration; lower standby current (12 µA) | Preferred where lowest power is critical and VPP circuitry is undesirable; requires revised sector protection firmware |
| MX29LV320ETTI-70G | Same 32 Mbit density and TSOP-48 package; supports 70 ns access but no suspend/resume feature | Offers boot-block configuration and CFI, but erase suspend unavailable - limits real-time update capability | Drop-in replacement for read/write timing-critical designs without suspend dependency; verify bootloader compatibility with missing resume commands |
Compared with SST39VF3201-70-4C-EKE and MX29LV320ETTI-70G, the AT49BV320D-70TU-T uniquely combines VPP-accelerated programming, hardware-enforced Hardlock via WP pin, and full erase/program suspend - making it the only option among the three suitable for safety-certified systems requiring concurrent operation guarantees.
Availability
AT49BV320D-70TU-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy telecom line card boot code, and medical diagnostic equipment configuration requiring stable component supply over extended product lifecycles.
Supply support for AT49BV320D-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 acquired Atmel in 2016 and maintains full technical support and manufacturing continuity for the AT49BV series. The company specializes in secure, reliable microcontrollers and nonvolatile memory for industrial and automotive applications.
The AT49BV320D-70TU-T belongs to Atmel's legacy parallel Flash memory product line, designed specifically for embedded systems requiring in-system programmability, robust data retention, and hardware-assisted sector protection in space-constrained 16-bit bus architectures.
FAQ
What is the function of the VPP pin on the AT49BV320D-70TU-T?
The VPP pin on the AT49BV320D-70TU-T serves dual purposes: it enables write protection when held below 0.4 V (inhibiting all program/erase operations), and accelerates dual-word programming when set to 10.0 V. Normal program/erase functions require VPP ≥1.65 V. The pin must never be left floating, and its voltage level is monitored by the Write State Machine to set the VPPS status bit (SR3) if out of range during operation.
Does the AT49BV320D-70TU-T support true concurrent read and erase operations?
Yes, the AT49BV320D-70TU-T supports true concurrent operation via its Erase Suspend feature: issuing the B0h command pauses an active sector erase, allowing reads or word programming from any other unerased sector within the same device. The suspended erase resumes only upon receipt of the D0h Erase Resume command, with ≤15 µs latency to enter suspend state.
How does sector protection work on the AT49BV320D-70TU-T?
The AT49BV320D-70TU-T implements two independent sector protection modes: Softlock (software-unlockable via 60h/D0h command) and Hardlock (hardware-gated by WP pin state). At power-up, all sectors default to Softlock. Hardlock becomes permanent only when WP is low; raising WP to VIH overrides Hardlock and permits unlocking. Protection status per sector is readable via I/O0/I/O1 at address 00002h.
Is the AT49BV320D-70TU-T compatible with Common Flash Interface (CFI) hosts?
Yes, the AT49BV320D-70TU-T fully complies with the Common Flash Interface standard. Issuing the 98h command places the device in CFI Query mode, exposing standardized parameter tables at fixed addresses (e.g., primary vendor command set at 0000h, geometry at 0027h). This enables host firmware to auto-detect density, sector map, timing, and command sets without vendor-specific drivers.
What is the purpose of the 128-bit protection register in the AT49BV320D-70TU-T?
The 128-bit protection register in the AT49BV320D-70TU-T consists of two 64-bit sectors: Sector A (factory-programmed unique ID, read-only) and Sector B (user-programmable and lockable). Sector B can be permanently locked using the C0h/80h command, preventing further writes. This register supports secure device identification, cryptographic key storage, and anti-cloning measures in regulated applications.
AT49BV320D-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
AT49BV320D-70TU-T FAQ
1.How can I place an order for AT49BV320D-70TU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV320D-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 AT49BV320D-70TU-T reliable?
The price and inventory of AT49BV320D-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 AT49BV320D-70TU-T is usually 5 days.
3.What payment methods are accepted for AT49BV320D-70TU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV320D-70TU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV320D-70TU-T?
AT49BV320D-70TU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV320D-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 AT49BV320D-70TU-T?
For technical support, including AT49BV320D-70TU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV320D-70TU-T requirements.
6.How does Aetrix verify that AT49BV320D-70TU-T is sourced from the original manufacturer or authorized distributors?
All AT49BV320D-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 AT49BV320D-70TU-T meets industry standards.
7.What is the process for return or replacement of AT49BV320D-70TU-T?
All AT49BV320D-70TU-T units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV320D-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 AT49BV320D-70TU-T part is unused and in its original packaging.
Return procedure for AT49BV320D-70TU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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