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Microchip Technology AT49BV802AT-70TI
- Part No.:
- AT49BV802AT-70TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV802AT-70TI.pdf
- Description:
- IC FLASH 8MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,773
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Product details
Overview
AT49BV802AT-70TI from Microchip Technology (formerly Atmel) is a 8-Mbit (524,288 × 16 / 1,048,576 × 8) single-supply Flash memory IC with 70 ns access time, sector erase architecture (15 × 64KB + 8 × 8KB), and support for byte/word programming in 12 µs. It operates from 2.65V to 3.6V and features suspend/resume capability for concurrent read/program during erase - ideal for embedded boot code storage and firmware updates in industrial controllers.
For engineers reviewing the AT49BV802AT-70TI datasheet, AT49BV802AT-70TI pinout, AT49BV802AT-70TI application, or AT49BV802AT-70TI equivalent, key selection considerations include its TSOP-48/CBGA-48 packaging, CFI-compliant interface, 128-bit protection register, sector lockdown for secure boot, and compatibility with in-system programming via single 3.3V supply.
Technical Context
The AT49BV802AT-70TI implements a command-based Flash architecture with dual-mode data bus (x8/x16 selectable via BYTE pin), CE/OE/WE control logic for bus contention avoidance, and internal state machine for program/erase operations. Its 23-sector layout includes top-boot or bottom-boot configuration options, with sector sizes differing between AT49BV802A (8×4KB + 15×64KB) and AT49BV802AT (15×64KB + 8×8KB) variants - confirmed by separate sector address tables.
It supports three end-of-operation detection methods: READY/BUSY pin (open-drain), Data Polling on I/O7, and Toggle Bit on I/O6 - all configurable via a two-bit status register. The device also integrates hardware data protection (VCC sense, power-on delay, control-line inhibit) and a factory-programmed 64-bit block + user-programmable/lockable 64-bit block in its 128-bit protection register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (524,288 words × 16 or 1,048,576 bytes × 8) - supports both word and byte addressing modes. |
| Access Time | 70 ns - defines maximum read latency under worst-case VCC and temperature conditions. |
| Supply Voltage | 2.65V to 3.6V - enables direct interfacing with 3.3V logic without level shifters. |
| Program Time | 12 µs per byte/word - enables fast field firmware patching without system downtime. |
| Erase Time | 300 ms per sector - deterministic timing for sector-level updates in real-time systems. |
| Erase Cycles | ≥100,000 per sector - ensures long-term reliability for frequently updated firmware partitions. |
| CFI Support | Yes - allows runtime auto-detection of geometry, timing, and command set by host bootloader. |
Pinout & Package
AT49BV802AT-70TI is available in 48-lead TSOP (Type 1) and 48-ball CBGA packages. Both packages share identical pin functions and signal assignments, with NC pins unused and RDY/BUSY provided as open-drain output.
| 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. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access. |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention during multi-device sharing. |
| WE | Write Enable | Controls write latching; falling edge triggers command/address/data capture in programming cycles. |
| BYTE | Data Bus Mode Select | Logic '1' = x16 mode (I/O0–I/O15 active); Logic '0' = x8 mode (I/O0–I/O7 active, I/O15 = A−1). |
| I/O0–I/O15 / A−1 | Bi-directional Data / LSB Address | In x16 mode: full 16-bit data path; in x8 mode: I/O0–I/O7 = data, I/O15 = A−1 for extended addressing. |
| RDY/BUSY | Operation Status Output | Open-drain signal pulled low during program/erase; supports wired-OR with multiple devices. |
| RESET | Hardware Initialization | Forces device into read/standby mode; halts ongoing operations and tri-states outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 23 independently erasable sectors (15 × 64KB + 8 × 8KB) - enables granular firmware partitioning and over-the-air update safety. |
| Erase/Program Suspend | Allows reading from non-suspending sectors while erasing/programming others - critical for real-time interrupt handling during flash updates. |
| Sector Lockdown | Per-sector write-protection activated via 6-cycle command - preserves boot code integrity against accidental overwrite. |
| 128-bit Protection Register | Factory-programmed 64-bit ID + user-programmable/lockable 64-bit block - supports secure device authentication and anti-cloning. |
| Common Flash Interface (CFI) | Standardized query mode (98h @ 55h) returns device geometry, timing, and command set - simplifies bootloader portability across flash vendors. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Partition |
|---|---|
|
Use Scenario: Storing certified bootloader and safety-critical initialization routines in programmable flash memory within Class II medical equipment. IC Role / Device Role / Timing Role: Non-volatile boot memory providing deterministic 70 ns read access and hardware-protected execution start vector. Use Value: Sector lockdown prevents unauthorized modification of boot code; CFI enables automatic validation of flash parameters during power-up self-test. |
Use Scenario: Isolating regulatory-approved firmware images from field-upgradable application modules in diagnostic imaging systems. IC Role / Device Role / Timing Role: Dual-mode (x8/x16) Flash memory supporting legacy 8-bit microcontrollers and modern 16-bit DSPs in same BOM. Use Value: 12 µs program time and suspend/resume allow background firmware patching without interrupting real-time image acquisition. |
| Automotive Body Control Module | Telecom Remote Node Configuration |
|
Use Scenario: Holding calibration data and vehicle-specific configuration profiles in automotive BCMs operating across −40°C to +105°C ambient. IC Role / Device Role / Timing Role: Industrial-grade Flash memory with 100,000 erase cycles and 2.65–3.6V operation tolerating battery voltage transients. Use Value: Hardware data protection (VCC sense + 10 ms power-on delay) prevents corruption during cold-cranking or load-dump events. |
Use Scenario: Storing encrypted configuration templates and protocol stacks for remote base station radios deployed in unattended locations. IC Role / Device Role / Timing Role: Secure Flash memory with 128-bit protection register enabling cryptographic key binding and tamper-evident provisioning. Use Value: User-lockable Block B allows OEMs to embed immutable security credentials while permitting field updates to operational parameters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF800A-70-4C-EKE | 8-Mbit, 70 ns, 2.7–3.6V; no CFI; lacks suspend/resume and 128-bit protection register. | Lower security assurance; unsuitable where sector lockdown or runtime CFI interrogation is required. | Choose when cost sensitivity outweighs advanced features and security requirements. |
| MX29LV800CTTC-70G | 8-Mbit, 70 ns, 2.7–3.6V; supports CFI and sector protection, but no erase/program suspend or 128-bit register. | Compatible for basic firmware storage, but cannot support concurrent read/program during erase. | Prefer for legacy designs already using Macronix toolchains; verify absence of suspend requirement. |
Compared with SST39VF800A-70-4C-EKE and MX29LV800CTTC-70G, the AT49BV802AT-70TI uniquely delivers simultaneous suspend/resume, sector lockdown, and 128-bit protection - making it the only option among the three qualified for secure, real-time firmware update architectures.
Availability
AT49BV802AT-70TI is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic equipment, automotive body control modules, and telecom remote nodes requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT49BV802AT-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 acquired Atmel in 2016 and maintains full support for legacy Atmel Flash products including the AT49BV802AT series. The company specializes in secure, reliable microcontrollers and memory solutions for industrial and automotive markets.
The AT49BV802AT belongs to Atmel's parallel-interface Flash memory product line, designed specifically for embedded systems requiring robust in-system programmability, hardware-based security, and deterministic timing in harsh environments.
FAQ
What is the difference between AT49BV802A and AT49BV802AT?
The AT49BV802AT-70TI differs from AT49BV802A in sector organization: AT49BV802AT uses a bottom-boot configuration with 15 × 64KB sectors followed by 8 × 8KB sectors, whereas AT49BV802A uses top-boot with 8 × 8KB sectors first. This affects address mapping and boot vector placement. Both share identical timing, voltage, and feature sets. The AT49BV802AT-70TI is the specific variant documented with the 70 ns speed grade and TSOP/CBGA packaging.
Does AT49BV802AT-70TI support both x8 and x16 data bus modes?
Yes, AT49BV802AT-70TI supports both configurations via the BYTE pin: logic high enables x16 mode (I/O0–I/O15 active), logic low enables x8 mode (I/O0–I/O7 active, I/O15 repurposed as A−1). This flexibility allows seamless integration with 8-bit microcontrollers and 16-bit processors without external glue logic. The device automatically adapts internal addressing based on BYTE state.
How does sector lockdown work on AT49BV802AT-70TI?
Sector lockdown on AT49BV802AT-70TI is enabled per sector using a six-bus-cycle command (555h/AAh → AAah/55h → 555h/80h → 555h/AAh → AAah/55h → SA/60h). Once locked, the sector becomes read-only until reset or power cycle. Lock status is verified by reading address 00002h within the sector: I/O0 = high indicates lockdown active. AT49BV802AT-70TI uses this to protect boot code from accidental overwrite during field updates.
Can AT49BV802AT-70TI be used in systems requiring Common Flash Interface (CFI)?
Yes, AT49BV802AT-70TI fully supports CFI. Entering CFI Query mode requires writing 98h to address 55h, after which standardized parameter tables (geometry, timings, command set) are readable at defined offsets. This enables host software to auto-configure drivers without hardcoding vendor-specific behavior - a key advantage for AT49BV802AT-70TI in multi-source supply chain strategies.
What are the power consumption characteristics of AT49BV802AT-70TI?
AT49BV802AT-70TI draws 12 mA during active read/program operations and only 13 µA in standby mode. Its 2.65–3.6V supply range eliminates need for dedicated 5V rails, and hardware data protection (VCC sense + 10 ms power-on delay) prevents spurious writes during brown-out conditions. These traits make AT49BV802AT-70TI suitable for battery-backed and energy-constrained embedded systems.
AT49BV802AT-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:
- 8Mbit
- Memory Organization:
- 1M x 8, 512K 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
AT49BV802AT-70TI FAQ
1.How can I place an order for AT49BV802AT-70TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV802AT-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 AT49BV802AT-70TI reliable?
The price and inventory of AT49BV802AT-70TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV802AT-70TI is usually 5 days.
3.What payment methods are accepted for AT49BV802AT-70TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV802AT-70TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV802AT-70TI?
AT49BV802AT-70TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV802AT-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 AT49BV802AT-70TI?
For technical support, including AT49BV802AT-70TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV802AT-70TI requirements.
6.How does Aetrix verify that AT49BV802AT-70TI is sourced from the original manufacturer or authorized distributors?
All AT49BV802AT-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 AT49BV802AT-70TI meets industry standards.
7.What is the process for return or replacement of AT49BV802AT-70TI?
All AT49BV802AT-70TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV802AT-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 AT49BV802AT-70TI part is unused and in its original packaging.
Return procedure for AT49BV802AT-70TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV802AT-70TI Tags
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