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Microchip Technology AT49BV802DT-70TU
- Part No.:
- AT49BV802DT-70TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV802DT-70TU.pdf
- Description:
- IC FLASH 8MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,153
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Product details
Overview
AT49BV802DT-70TU from Microchip Technology (formerly Atmel) is an 8-Mbit (512K × 16 / 1M × 8) 3.3V-only parallel Flash memory with 70 ns access time, sector erase architecture (15 × 64KB + 8 × 8KB), and single-pulse programming support. It operates across 2.65–3.6V, delivers 10 µs byte/word program time, and supports in-system reprogramming for embedded boot code storage.
For engineers reviewing the AT49BV802DT-70TU datasheet, AT49BV802DT-70TU pinout, AT49BV802DT-70TU application, or AT49BV802DT-70TU equivalent, key selection criteria include sector lockdown capability, CFI compliance for auto-configuration, RDY/BUSY and toggle-bit status reporting, and TSOP/CBGA package compatibility with legacy 48-pin parallel Flash footprints.
Technical Context
The AT49BV802DT-70TU implements a command-register-based parallel interface with CE/OE/WE control logic and BYTE pin-selectable x8/x16 data bus configuration. Its internal write state machine handles embedded program/erase cycles without external timing control.
It features dual-status detection (RDY/BUSY pin + I/O6 toggle bit + I/O7 data polling), programmable configuration register (00/01 mode), and hardware data protection including VCC sense and power-on delay. Sector lockdown and 128-bit protection register provide secure boot and firmware integrity functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (524,288 × 16 or 1,048,576 × 8), enabling compact boot ROM or firmware storage in space-constrained designs |
| Access Time | 70 ns max - meets timing requirements for 14 MHz bus interfaces without wait states |
| Supply Voltage | 2.65V to 3.6V - compatible with 3.3V system rails and tolerant of typical voltage droop |
| Program Time | 10 µs per byte/word - reduces firmware update latency during field upgrades |
| Erase Time | 100 ms per sector - enables fast partial reprogramming without full-chip erase overhead |
| Erase Cycles | ≥100,000 per sector - supports long-life industrial logging or configuration storage |
| CFI Support | Yes - allows runtime identification of geometry, timing, and command set for OS/driver portability |
Pinout & Package
AT49BV802DT-70TU is available in 48-lead TSOP (Type 1) and 48-ball CBGA packages. Both variants share identical pin functions and signal mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word (x16) or 1M-byte (x8) addressing space |
| I/O0–I/O14 | Data I/O (bidirectional) | Configurable as x8 (I/O0–I/O7 active) or x16 (I/O0–I/O15 active) based on BYTE pin state |
| I/O15 / A-1 | Multi-function Terminal | In word mode: data bit 15; in byte mode: LSB address bit (A-1) for accessing upper/lower byte of 16-bit words |
| BYTE | Bus Width Select | Logic high = x16 mode (I/O0–I/O15 active); logic low = x8 mode (I/O0–I/O7 active, I/O8–I/O14 tri-stated) |
| CE, OE, WE | Control Enables | Three independent enables prevent bus contention; OE/CE low + WE high = read; WE low + CE/OE controlled = write |
| RDY/BUSY | Open-drain Status Output | Active-low during program/erase; supports wired-OR connection for multi-device status monitoring |
| RESET | Hardware Initialization | Pulling low halts ongoing operation and forces high-impedance outputs; return to read/standby on rising edge |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 23 independently erasable sectors (15 × 64KB + 8 × 8KB) enables granular firmware updates without disturbing boot code |
| Erase/Program Suspend | Allows reading from non-suspending sectors during active erase/program - critical for real-time interrupt handling in embedded systems |
| Sector Lockdown | Per-sector write-protection via software command prevents accidental overwrite of bootloader or security-critical code |
| 128-bit Protection Register | Factory-programmed 64-bit block A + user-programmable/lockable block B supports device authentication and secure key storage |
| Common Flash Interface (CFI) | Standardized query table at known addresses enables automatic driver initialization and multi-vendor flash abstraction layers |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing certified bootloader and safety-monitoring firmware in DIN-rail mounted controllers requiring >10-year data retention and field-upgradable logic. IC Role / Device Role / Timing Role: Nonvolatile boot ROM with sector lockdown protecting startup sequence and CFI-enabled runtime validation of firmware integrity. Use Value: Prevents unauthorized modification of safety-critical startup code while allowing scheduled updates to application logic via unprotected sectors. |
Use Scenario: Holding FDA-cleared diagnostic firmware in portable ultrasound units where power loss during update must not corrupt boot image. IC Role / Device Role / Timing Role: Parallel Flash acting as primary boot memory with suspend/resume capability ensuring uninterrupted operation during firmware patching. Use Value: Enables safe over-the-air updates by suspending erase in one sector while executing diagnostics from another - eliminating reboot windows. |
| Automotive Infotainment Head Unit | Telecom Base Station Configuration |
Use Scenario: Storing UI assets, voice recognition models, and CAN protocol stacks in vehicle head units operating across -40°C to +105°C ambient. IC Role / Device Role / Timing Role: High-reliability Flash memory with 100,000-cycle endurance and 70 ns access supporting real-time audio/video rendering pipelines. Use Value: Meets AEC-Q100 stress test requirements via robust hardware data protection (VCC sense, 10 ms power-on delay) and green Pb/Halide-free packaging. |
Use Scenario: Maintaining carrier-specific configuration profiles and encryption keys in LTE small-cell base stations deployed in remote locations. IC Role / Device Role / Timing Role: Secure configuration store using 128-bit protection register (block A factory-unique ID + block B user-key storage). Use Value: Enables cryptographic binding of hardware identity to operator credentials, preventing unauthorized firmware loading or cloning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF800A-70-4C-EKE | Same density (8 Mbit), 70 ns access, but uses different command set and lacks CFI; no sector lockdown or 128-bit protection register | Lower-cost replacement where secure boot and field-upgrade safety are not required | Choose SST39VF800A only if existing firmware already implements its proprietary command sequences and security is handled externally |
| MX29LV800CTTI-70G | Pin-compatible 48-TSOP, 70 ns, supports CFI and sector protection, but requires 2.7–3.6V and lacks program suspend/resume and BYTE pin flexibility | Better suited for fixed-x16 systems without need for dynamic bus-width switching | Select MX29LV800CTTI-70G when migrating legacy designs that rely on standard AMD/Fujitsu command sets and do not require suspend functionality |
Compared with SST39VF800A-70-4C-EKE and MX29LV800CTTI-70G, the AT49BV802DT-70TU uniquely combines CFI compliance, hardware-enforced sector lockdown, and true suspend/resume for concurrent read/write - making it optimal for safety-certified or field-upgradable embedded systems where firmware integrity and real-time responsiveness are mandatory.
Availability
AT49BV802DT-70TU is available at Aetrix Electronics and suitable for industrial control, medical diagnostics, automotive infotainment, and telecom infrastructure applications requiring stable component supply and long-term lifecycle support.
Supply support for AT49BV802DT-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 support for legacy Atmel Flash products, including technical documentation, errata, and long-term manufacturing commitments.
The AT49BV802DT-70TU belongs to Atmel's parallel Flash memory family designed specifically for reliable, in-system programmable boot code and firmware storage in resource-constrained embedded systems.
FAQ
What is the difference between AT49BV802D and AT49BV802DT?
The AT49BV802DT-70TU differs from the AT49BV802D primarily in sector organization: the 'T' variant features 23 uniform 64KB sectors (vs. 15×64KB + 8×8KB in the base D version), simplifying firmware partitioning and enabling consistent erase timing across all sectors. Both share identical pinout, timing, and command set, making them functionally interchangeable in most designs - though sector address tables must be updated for the 'T' variant.
Does AT49BV802DT-70TU support both x8 and x16 data bus modes?
Yes, AT49BV802DT-70TU supports configurable bus width via the BYTE pin: logic high selects x16 mode (I/O0–I/O15 active), logic low selects x8 mode (I/O0–I/O7 active, I/O8–I/O14 tri-stated, I/O15 repurposed as A-1). This allows seamless integration into either 8-bit or 16-bit microcontroller buses without external glue logic.
How does the sector lockdown feature work in AT49BV802DT-70TU?
The sector lockdown feature in AT49BV802DT-70TU is enabled per sector via a six-bus-cycle command (555h/AAh → AAah/55h → 555h/80h → 555h/AAh → AAah/55h → SA/60h). Once locked, a sector becomes read-only until the next power cycle or RESET assertion. Lock status is verified by reading address 00002h within the sector - I/O0 = high indicates lockdown active.
Can AT49BV802DT-70TU be used with 5V-tolerant microcontrollers?
Yes - AT49BV802DT-70TU accepts address and control inputs (A0–A18, CE, OE, WE, RESET, BYTE) up to 5.5V regardless of VCC level (2.65–3.6V), enabling direct interfacing with 5V microcontrollers without level shifters. However, I/O pins are limited to 0–VCC+0.6V, so bidirectional data lines require voltage translation if the host operates above 3.6V.
What status reporting methods does AT49BV802DT-70TU provide for program/erase completion?
AT49BV802DT-70TU provides three concurrent status reporting methods: (1) RDY/BUSY pin (open-drain active-low), (2) I/O7 data polling (complement-to-data or high-on-complete depending on config register), and (3) I/O6 toggle bit (toggles during operation, stops on completion). All three can be used simultaneously for robust end-of-cycle detection in safety-critical applications.
AT49BV802DT-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:
- 8Mbit
- Memory Organization:
- 512K 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
AT49BV802DT-70TU FAQ
1.How can I place an order for AT49BV802DT-70TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV802DT-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 AT49BV802DT-70TU reliable?
The price and inventory of AT49BV802DT-70TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV802DT-70TU is usually 5 days.
3.What payment methods are accepted for AT49BV802DT-70TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV802DT-70TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV802DT-70TU?
AT49BV802DT-70TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV802DT-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 AT49BV802DT-70TU?
For technical support, including AT49BV802DT-70TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV802DT-70TU requirements.
6.How does Aetrix verify that AT49BV802DT-70TU is sourced from the original manufacturer or authorized distributors?
All AT49BV802DT-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 AT49BV802DT-70TU meets industry standards.
7.What is the process for return or replacement of AT49BV802DT-70TU?
All AT49BV802DT-70TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV802DT-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 AT49BV802DT-70TU part is unused and in its original packaging.
Return procedure for AT49BV802DT-70TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV802DT-70TU Tags
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