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Microchip Technology AT49BV802AT-70TU
- Part No.:
- AT49BV802AT-70TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV802AT-70TU.pdf
- Description:
- IC FLASH 8MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,205
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Product details
Overview
AT49BV802AT-70TU from Microchip Technology (formerly Atmel) is an 8-Mbit (524,288 × 16 / 1,048,576 × 8) single-supply Flash memory IC with 70 ns access time, sector erase architecture (15 × 64 KB + 8 × 8 KB), and support for byte/word programming in 12 µs. It operates from 2.65V to 3.6V and is used in embedded boot code storage, firmware update modules, and industrial controller nonvolatile memory.
For engineers reviewing the AT49BV802AT-70TU datasheet, AT49BV802AT-70TU pinout, AT49BV802AT-70TU application, or AT49BV802AT-70TU equivalent, key selection considerations include its TSOP-48/CBGA-48 dual-package availability, sector lockdown capability, CFI compliance, suspend/resume functionality for concurrent read/program operations, and 100,000 erase cycle endurance.
Technical Context
The AT49BV802AT-70TU implements a command-register-based Flash architecture with hardware data protection (VCC sense, 10 ms power-on delay, control-line inhibit). It supports both x8 and x16 data bus configurations via the BYTE pin, enabling flexible integration with 8-bit or 16-bit microcontrollers.
Its dual-sector architecture-eight 8K-word (16 KB) sectors and fifteen 32K-word (64 KB) sectors-is mirrored in the AT49BV802AT variant's inverted layout (top-boot vs. bottom-boot), with sector address tables confirming SA0–SA7 as 64 KB and SA15–SA22 as 8 KB. The device uses standard microprocessor write timings and features READY/BUSY, Data Polling (I/O7), and Toggle Bit (I/O6) for operation status detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (524,288 × 16 or 1,048,576 × 8) |
| Access Time | 70 ns - guarantees maximum read latency under worst-case VCC and temperature conditions |
| Supply Voltage | 2.65V to 3.6V - enables direct interface with 3.3V logic without level shifting |
| Program Time | 12 µs per byte/word - reduces firmware update duration in field-programmable systems |
| Erase Time | 300 ms per sector - enables fast selective reconfiguration of application partitions |
| Erase Endurance | 100,000 cycles - supports long-term field upgrades in industrial controllers |
| CFI Support | Yes - allows runtime auto-detection of geometry, timing, and command set by host bootloader |
Pinout & Package
AT49BV802AT-70TU is available in 48-lead TSOP (Type 1) and 48-ball CBGA packages. Both packages share identical pin functions and signal assignments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 524,288-word addressing; A-1 alias on I/O15 in byte mode |
| I/O0–I/O15 | Data I/O (x16) / I/O0–I/O7 + A-1 (x8) | Configurable bus width: x16 when BYTE=1; x8 with LSB address on I/O15 when BYTE=0 |
| CE, OE, WE | Chip Enable, Output Enable, Write Enable | Dual-control (CE+OE) prevents bus contention; WE latches commands and data during programming |
| RDY/BUSY | Open-drain status output | Active-low during internal program/erase; supports wired-OR of multiple devices on shared bus |
| RESET | Hardware initialization input | Pulling low halts ongoing operation and forces high-Z outputs; required to exit suspend or error states |
| BYTE | Bus width configuration | Logic high = x16 mode (I/O0–I/O15 active); logic low = x8 mode (I/O0–I/O7 active, I/O15=A-1) |
| NC | No Connect | Unbonded pins in both TSOP and CBGA packages - must be left floating or grounded per layout rules |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 23 independently erasable sectors (15 × 64 KB + 8 × 8 KB) enable granular firmware partitioning and secure boot code isolation |
| Erase/Program Suspend | Allows reading from or programming one sector while erasing another - critical for real-time firmware updates without system halt |
| Sector Lockdown | Per-sector write-protection activated via command; prevents accidental overwrite of boot loader or calibration data |
| 128-bit Protection Register | Factory-programmed 64-bit ID + user-programmable 64-bit block (lockable) - supports secure device authentication and anti-cloning |
| Common Flash Interface (CFI) | Standardized query table at fixed addresses enables OS/bootloader auto-configuration without hard-coded timing or geometry assumptions |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Loader |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers with field serviceability requirements. IC Role / Device Role / Timing Role: Nonvolatile program memory holding executable code and configuration parameters; accessed during cold start and firmware upgrade. Use Value: Sector lockdown protects boot sector from corruption during remote updates; 70 ns access ensures deterministic scan-cycle timing in real-time control loops. | Use Scenario: Secure boot image storage in FDA-cleared diagnostic equipment requiring tamper-resistant firmware integrity. IC Role / Device Role / Timing Role: Primary boot ROM providing authenticated startup sequence before loading application software from external media. Use Value: 128-bit protection register enables cryptographic binding of device identity to firmware; CFI support simplifies bootloader compatibility across production batches. |
| Automotive Infotainment Update Module | Network Router Configuration Memory |
Use Scenario: Storing updatable UI assets, voice recognition models, and map data in head-unit systems with over-the-air (OTA) update capability. IC Role / Device Role / Timing Role: Field-upgradable code/data partition supporting atomic sector erase and resume during active display rendering. Use Value: Erase suspend allows simultaneous UI refresh (reading from non-suspending sectors) and background firmware patching - eliminates user-visible stalls. | Use Scenario: Persistent storage of routing tables, security certificates, and VLAN configurations in enterprise-grade managed switches. IC Role / Device Role / Timing Role: Configuration EEPROM replacement offering faster write performance and higher endurance than legacy serial EEPROMs. Use Value: 12 µs byte programming and 100,000-cycle rating support frequent dynamic reconfiguration in SDN environments without wear-out concerns. |
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 | Same density (8 Mbit), 70 ns access, but uses SST proprietary command set; no CFI support; 100,000-cycle rating | Lacks CFI and suspend/resume - requires fixed bootloader; suitable only where firmware update concurrency is not required | Select if legacy SST toolchain compatibility is mandatory and CFI/suspend features are unused |
| MX29LV800CTTI-70G | 8 Mbit, 70 ns, CFI-compliant, but sector architecture differs (16 × 4 KB + 2 × 32 KB + 1 × 64 KB); no BYTE pin for x8/x16 mode switching | Fixed x16-only interface limits MCU compatibility; different sector map complicates porting of existing erase routines | Choose for cost-sensitive designs where x8 bus width is unnecessary and sector layout matches existing software |
Compared with SST39VF800A-70-4C-EKE and MX29LV800CTTI-70G, the AT49BV802AT-70TU uniquely combines CFI compliance, true x8/x16 configurability via BYTE pin, and full erase/program suspend capability - making it the only option supporting concurrent read-modify-write in safety-critical or real-time embedded systems.
Availability
AT49BV802AT-70TU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot loaders, automotive infotainment update modules, and network router configuration memory requiring stable component supply and long-term lifecycle support.
Supply support for AT49BV802AT-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 supply chain responsibility for the AT49BV802AT-70TU. Microchip is a global leader in microcontrollers, analog, and Flash memory solutions.
The AT49BV802AT-70TU belongs to Atmel's legacy parallel Flash memory product line, designed specifically for embedded systems requiring reliable, in-system programmable nonvolatile storage with robust data protection and field-upgrade flexibility.
FAQ
What is the difference between AT49BV802A and AT49BV802AT, and why does AT49BV802AT-70TU use the 'T' suffix?
The 'T' in AT49BV802AT-70TU denotes the top-boot sector configuration, where the smallest 8 KB sectors (SA15–SA22) are located at the highest memory addresses (0xF00000–0xFFFFFF), enabling boot code execution from upper memory. In contrast, the non-T variant (AT49BV802A) uses bottom-boot layout. This distinction is confirmed in the official sector address tables: AT49BV802AT-70TU's SA0–SA7 are 64 KB each starting at 0x000000, while SA15–SA22 are 8 KB - a layout optimized for x86-compatible reset vector fetching. The AT49BV802AT-70TU retains identical electrical specs, pinout, and command set as the base part.
Does AT49BV802AT-70TU support both x8 and x16 data bus widths, and how is the mode selected?
Yes, AT49BV802AT-70TU supports both x8 and x16 configurations via the dedicated BYTE pin. When BYTE = logic high, the device operates in 16-bit mode: I/O0–I/O15 are active data lines, and address bits A0–A18 fully decode the 524,288-word space. When BYTE = logic low, it operates in 8-bit mode: only I/O0–I/O7 are active data lines, and I/O15 functions as the LSB address input (A-1), enabling 1,048,576-byte addressing. This dual-mode capability is explicitly defined in the device description and pin function table, and requires no command sequence - mode is determined solely by the static logic level on BYTE at power-up or reset.
How does the sector lockdown feature work on AT49BV802AT-70TU, and can locked sectors be unlocked?
The sector lockdown feature on AT49BV802AT-70TU is enabled per sector using the six-bus-cycle Sector Lockdown command (address SA, data 60h). Once activated, a sector becomes permanently read-only - neither erase nor program operations are possible until the next power cycle or RESET assertion. Lockdown status is verified by reading address 00002h within the sector: I/O0 = high indicates lockdown active. Crucially, the only way to unlock a sector is through hardware reset or power-up; there is no software unlock command. This design ensures boot code integrity against accidental or malicious overwrite, and is documented in Sections 4.7 and 4.7.2 of the datasheet.
What methods does AT49BV802AT-70TU provide to detect completion of program or erase operations?
AT49BV802AT-70TU provides three independent, hardware-supported methods: (1) RDY/BUSY pin - open-drain output actively pulled low during internal operations; (2) Data Polling on I/O7 - returns complement of written data during programming, then true data upon completion (behavior depends on configuration register setting); (3) Toggle Bit on I/O6 - toggles between 0/1 during operation and stabilizes upon completion. All three are validated in the Status Bit Table (page 12) and supported across all operating modes. No polling or timeout fallback is required - these are deterministic, silicon-level status mechanisms.
Is AT49BV802AT-70TU RoHS compliant and available in green packaging?
Yes, AT49BV802AT-70TU is offered in green (Pb/Halide-free) packaging, as explicitly stated in the Features section of the datasheet. It meets RoHS Directive 2011/65/EU requirements for restricted substances. The device carries the "Green" designation in official Microchip documentation and is marked with appropriate RoHS-compliant date codes. This applies to both TSOP-48 and CBGA-48 package variants, and no leaded alternatives are offered for this part number.
AT49BV802AT-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:
- 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-70TU FAQ
1.How can I place an order for AT49BV802AT-70TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV802AT-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 AT49BV802AT-70TU reliable?
The price and inventory of AT49BV802AT-70TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV802AT-70TU is usually 5 days.
3.What payment methods are accepted for AT49BV802AT-70TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV802AT-70TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV802AT-70TU?
AT49BV802AT-70TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV802AT-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 AT49BV802AT-70TU?
For technical support, including AT49BV802AT-70TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV802AT-70TU requirements.
6.How does Aetrix verify that AT49BV802AT-70TU is sourced from the original manufacturer or authorized distributors?
All AT49BV802AT-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 AT49BV802AT-70TU meets industry standards.
7.What is the process for return or replacement of AT49BV802AT-70TU?
All AT49BV802AT-70TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV802AT-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 AT49BV802AT-70TU part is unused and in its original packaging.
Return procedure for AT49BV802AT-70TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV802AT-70TU Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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