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Microchip Technology AT49BV802A-70TU-T
- Part No.:
- AT49BV802A-70TU-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV802A-70TU-T.pdf
- Description:
- IC FLASH 8MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,754
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Product details
Overview
AT49BV802A-70TU-T from Microchip Technology (formerly Atmel) is an 8-Mbit (524,288 × 16 / 1,048,576 × 8) 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 architecture with 23 independently lockable sectors, and features suspend/resume capability for concurrent read/program operations during erase.
For engineers reviewing the AT49BV802A-70TU-T datasheet, AT49BV802A-70TU-T pinout, AT49BV802A-70TU-T application, or AT49BV802A-70TU-T equivalent, key selection considerations include its TSOP-48 package, byte/word mode flexibility via BYTE pin, Common Flash Interface (CFI) support for auto-configuration, and hardware data protection against inadvertent writes.
Technical Context
The AT49BV802A-70TU-T implements a command-register-based architecture with dual-mode addressing (x8/x16), enabling flexible integration into 8-bit and 16-bit bus systems. Its 23-sector layout includes fifteen 64 KB (32K-word) and eight 8 KB (4K-word) sectors, each individually lockable via software lockdown commands.
It supports three real-time status detection methods-Data Polling (I/O7), Toggle Bit (I/O6), and open-drain RDY/BUSY-enabling robust system-level timing control. The device also integrates a 128-bit protection register (factory-programmed Block A + user-programmable/lockable Block B) and a programmable configuration register that determines post-operation read-mode recovery behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (524,288 words × 16 or 1,048,576 bytes × 8) |
| Access Time | 70 ns - guarantees deterministic read latency for real-time firmware execution |
| Supply Voltage | 2.65 V to 3.6 V - enables direct interface with 3.3 V logic without level shifters |
| Program Time | 12 µs per byte/word - reduces firmware update duration in field-programmable systems |
| Sector Erase Time | 300 ms max per sector - enables selective field updates without full reflash |
| Erase Endurance | ≥100,000 cycles - supports long-life data logging and configuration storage |
| Standby Current | 13 µA - minimizes power draw in battery-backed or low-power sleep modes |
Pinout & Package
AT49BV802A-70TU-T is packaged in a 48-lead TSOP Type I (Thin Small Outline Package) with standard JEDEC MO-143AC footprint. Pin assignments are validated per Microchip datasheet 3405E–FLASH–2/07, Figure 2.1.
| 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 (x16 mode) | Bi-directional data lines; I/O15 serves as A−1 in x8 mode |
| I/O15 / A−1 | Mode-Dependent Terminal | In x16: data bit 15; in x8: LSB address input (A−1) for byte-aligned access |
| BYTE | Configuration Input | Logic high = x16 word mode; logic low = x8 byte mode - selects bus width dynamically |
| CE, OE, WE | Control Enables | Dual-line chip/output enable prevents bus contention; write enable triggers command latching |
| RDY/BUSY | Open-Drain Status Output | Active-low indicates ongoing program/erase; supports wired-OR multi-device monitoring |
| RESET | Hardware Initialization | Pulsing low ≥500 ns forces return to read/standby mode and halts active operations |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 23 independent sectors (15 × 64 KB + 8 × 8 KB) with individual software lockdown - enables secure boot code preservation while updating application partitions |
| Erase/Program Suspend | Interruptible erase or program cycles allow concurrent reads from non-suspended sectors - critical for real-time systems requiring background firmware updates |
| Common Flash Interface (CFI) | Standardized query mode (98h @ 55h) provides runtime discovery of geometry, timing, and command sets - eliminates hard-coded driver dependencies |
| 128-bit Protection Register | Factory-block A + user-lockable block B - supports secure device identification and tamper-resistant configuration storage |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), 10 ms power-on delay, and CE/OE/WE gating - prevents accidental writes during power ramp or noise events |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing firmware images and calibration tables in programmable logic controllers operating in harsh EMI environments with infrequent field updates. IC Role / Device Role / Timing Role: Non-volatile code storage with sector lockdown protecting bootloader and safety-critical routines. Use Value: 70 ns access time ensures deterministic instruction fetch; 100,000 erase cycles support >10-year field life with quarterly updates. |
Use Scenario: Retaining patient-specific therapy parameters and device serialization data across power cycles in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, low-power configuration memory with CFI-assisted driver portability across product generations. Use Value: 13 µA standby current extends battery life; 128-bit protection register enables cryptographic key binding to hardware identity. |
| Automotive Infotainment Bootloader | Networking Equipment Image Backup |
Use Scenario: Hosting primary and fallback bootloader images in telematics units requiring AEC-Q100-compliant storage with fast recovery. IC Role / Device Role / Timing Role: Dual-boot partitioned Flash with suspend/resume enabling seamless OTA firmware validation and rollback. Use Value: Sector erase suspend allows reading active image while programming backup - eliminates boot interruption during updates. |
Use Scenario: Storing redundant firmware copies and MAC address tables in managed switches with hot-swap capability. IC Role / Device Role / Timing Role: High-reliability data archive with RDY/BUSY pin enabling precise timing of flash operations amid packet processing. Use Value: Open-drain RDY/BUSY supports multi-device status polling on shared bus; TSOP-48 simplifies PCB routing in dense switch fabric layouts. |
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-NHE | Same density (8 Mbit), 70 ns access, but uses different command set and lacks CFI support | No native CFI query mode - requires fixed driver integration; no 128-bit protection register | Choose when legacy SST-compatible firmware exists and CFI auto-detection is unnecessary |
| MX29LV800CTTI-70G | Identical pinout and command compatibility (JEDEC-standard), but rated for industrial temp range only (−40°C to +85°C) | Same sector architecture and suspend/resume functionality; no BYTE pin for x8/x16 mode switching | Prefer for cost-sensitive industrial designs where extended temperature operation is not required |
Compared with SST39VF800A-70-4C-NHE and MX29LV800CTTI-70G, the AT49BV802A-70TU-T uniquely combines CFI support, dual-bus-width flexibility via BYTE pin, and a factory-programmed 128-bit security register - making it optimal for secure, field-upgradable embedded systems requiring driver portability and hardware-rooted identity.
Availability
AT49BV802A-70TU-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, automotive infotainment bootloader, networking equipment image backup, and embedded data logging requiring stable component supply and long-term lifecycle assurance.
Supply support for AT49BV802A-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 is a global semiconductor company specializing in microcontrollers, analog devices, and non-volatile memory solutions, with strong focus on embedded control and secure connectivity.
The AT49BV802A-70TU-T belongs to Microchip's legacy parallel Flash memory product line, engineered for reliable in-system programming in resource-constrained embedded systems requiring deterministic timing and hardware-level data protection.
FAQ
What is the operating voltage range for the AT49BV802A-70TU-T?
The AT49BV802A-70TU-T operates over a single supply voltage range of 2.65 V to 3.6 V. This allows direct interfacing with standard 3.3 V logic families without external level-shifting circuitry. Operation below 2.65 V disables programming functions via internal VCC sense, and voltages above 3.6 V exceed absolute maximum ratings and may cause permanent damage.
How does the BYTE pin affect the AT49BV802A-70TU-T's data interface?
The BYTE pin on the AT49BV802A-70TU-T configures the device for either x8 or x16 data bus operation: logic high enables 16-bit word mode (I/O0–I/O15 active), while logic low enables 8-bit byte mode (I/O0–I/O7 active, I/O15 repurposed as A−1). This pin must be set at power-up and cannot be changed dynamically during operation.
Does the AT49BV802A-70TU-T support simultaneous read and program operations?
Yes - the AT49BV802A-70TU-T supports Program Suspend/Resume, allowing an active byte/word programming operation to be paused so the host can read from any non-programming sector. After reading, the Program Resume command restores the suspended write, enabling true concurrent access in multitasking embedded systems.
What is the purpose of the 128-bit protection register in the AT49BV802A-70TU-T?
The AT49BV802A-70TU-T's 128-bit protection register consists of two 64-bit blocks: Block A is factory-programmed with a unique identifier and is immutable; Block B is user-programmable and optionally lockable. This structure supports secure device authentication, cryptographic key binding, and tamper-resistant storage of calibration or licensing data.
How is end-of-erase or end-of-program detected on the AT49BV802A-70TU-T?
The AT49BV802A-70TU-T provides three independent status mechanisms: (1) RDY/BUSY pin (open-drain, active-low), (2) Data Polling on I/O7, and (3) Toggle Bit on I/O6. These may be used individually or in combination per the algorithms in Figures 4-1 through 4-4 of the datasheet to ensure reliable operation detection under varying configuration register settings.
AT49BV802A-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:
- 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
AT49BV802A-70TU-T FAQ
1.How can I place an order for AT49BV802A-70TU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV802A-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 AT49BV802A-70TU-T reliable?
The price and inventory of AT49BV802A-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 AT49BV802A-70TU-T is usually 5 days.
3.What payment methods are accepted for AT49BV802A-70TU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV802A-70TU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV802A-70TU-T?
AT49BV802A-70TU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV802A-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 AT49BV802A-70TU-T?
For technical support, including AT49BV802A-70TU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV802A-70TU-T requirements.
6.How does Aetrix verify that AT49BV802A-70TU-T is sourced from the original manufacturer or authorized distributors?
All AT49BV802A-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 AT49BV802A-70TU-T meets industry standards.
7.What is the process for return or replacement of AT49BV802A-70TU-T?
All AT49BV802A-70TU-T units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV802A-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 AT49BV802A-70TU-T part is unused and in its original packaging.
Return procedure for AT49BV802A-70TU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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