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Microchip Technology AT49BV802AT-70TU-T
- Part No.:
- AT49BV802AT-70TU-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV802AT-70TU-T.pdf
- Description:
- IC FLASH 8MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,121
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Product details
Overview
AT49BV802AT-70TU-T 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 suspend/resume capability for in-system programming. It operates from 2.65V to 3.6V and supports both byte (x8) and word (x16) data interfaces via the BYTE pin - used in embedded boot code storage and firmware update modules.
For engineers reviewing the AT49BV802AT-70TU-T datasheet, AT49BV802AT-70TU-T pinout, AT49BV802AT-70TU-T application, or AT49BV802AT-70TU-T equivalent, key selection considerations include its TSOP-48 package, sector lockdown support, CFI compliance, 100,000 erase cycles, and dual-mode (top/bottom boot) configuration - critical for secure bootloader partitioning and field-upgradable systems.
Technical Context
The AT49BV802AT-70TU-T implements a command-based Flash architecture with CE/OE/WE control logic and a dedicated READY/BUSY open-drain output. Its internal write state machine handles embedded program/erase timing, eliminating external clocks during operations.
It features dual-sector architecture (15 large + 8 small sectors), configurable status bit behavior (via 2-bit configuration register), and hardware data protection including VCC sense (<1.8V inhibit) and power-on delay (10 ms typical). The device supports CFI Query mode (98h @ 55h) for runtime parameter discovery and 128-bit factory/user-programmable protection register with lockable Block B.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (524,288 × 16 or 1,048,576 × 8) |
| Access Time | 70 ns - determines maximum read throughput in high-speed microcontroller interfaces |
| Supply Voltage | 2.65V–3.6V - enables direct connection to 3.3V logic without level shifting |
| Program Time | 12 µs per byte/word - reduces firmware update latency in embedded hosts |
| Sector Erase Time | 300 ms max per sector - enables selective field updates without full chip reflash |
| Erase Endurance | 100,000 cycles - qualifies for long-life industrial firmware storage |
| Standby Current | 13 µA - supports low-power sleep modes in battery-backed systems |
Pinout & Package
AT49BV802AT-70TU-T is packaged in a 48-lead TSOP Type I (Thin Small Outline Package) with 0.5 mm pitch, compliant with JEDEC MO-141BA. Pin 1 is marked by a beveled corner; pin numbering proceeds counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 8-Mbit addressing; A-1 function on I/O15 in byte mode |
| I/O0–I/O14 | Data I/O (x16/x8) | Bi-directional data lines; I/O8–I/O14 tri-stated in byte mode |
| I/O15 / A-1 | Mode-Dependent Terminal | In word mode: data bit 15; in byte mode: LSB address input (A-1) |
| BYTE | Interface Configuration | Logic high = x16 mode (I/O0–I/O15 active); logic low = x8 mode (I/O0–I/O7 active) |
| CE, OE, WE | Control Enables | Three independent enables prevent bus contention; dual-line (CE+OE) read control |
| RDY/BUSY | Open-Drain Status | Active-low indicates ongoing program/erase; supports wired-OR of multiple devices |
| RESET | Hardware Initialization | Pulling low halts operation and forces high-impedance outputs; required to exit suspend modes |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 23 independently erasable sectors (15 × 64KB + 8 × 8KB) enables granular firmware partitioning and OTA updates |
| Erase/Program Suspend | Allows real-time read access from non-suspending sectors during background erase/program - essential for multitasking bootloaders |
| Sector Lockdown | Per-sector write-protection prevents accidental overwrite of boot code; locked sectors persist across power cycles until reset |
| Common Flash Interface (CFI) | Standardized query table (98h @ 55h) enables automatic driver detection and vendor-agnostic flash management |
| 128-bit Protection Register | Factory-programmed Block A + user-programmable/lockable Block B provides hardware-rooted security for firmware signing keys |
Applications
| Secure Bootloader Storage | Firmware Update Module |
|---|---|
Use Scenario: Storing primary bootloader and secure ROM code in industrial PLCs requiring tamper-resistant initialization. IC Role / Device Role / Timing Role: Non-volatile boot memory with sector lockdown protecting first 64KB; accessed at power-on reset via x16 interface. Use Value: Prevents unauthorized modification of startup code using hardware-enforced write protection and 100,000-cycle endurance. |
Use Scenario: Field-upgradable application firmware in medical diagnostic equipment with dual-bank update capability. IC Role / Device Role / Timing Role: Secondary Flash bank supporting background erase/suspend while host executes from protected sectors. Use Value: Enables zero-downtime firmware patches via 300 ms sector erase and 12 µs byte programming - verified by RDY/BUSY and Data Polling. |
| Industrial HMI Display Controller | Automotive Telematics Unit |
Use Scenario: Storing GUI assets and configuration profiles in human-machine interface panels operating in extended temperature ranges. IC Role / Device Role / Timing Role: x8 interface Flash memory mapped to microcontroller's external bus; accessed via CE/OE strobes with 70 ns timing. Use Value: Low 13 µA standby current extends panel standby life; TSOP-48 package ensures compatibility with compact PCB layouts. |
Use Scenario: Storing CAN protocol stack and calibration data in vehicle telematics gateways requiring AEC-Q100 alignment. IC Role / Device Role / Timing Role: Boot-critical Flash with top/bottom boot configuration supporting fail-safe recovery partitions. Use Value: CFI-compliant interface allows standardized flash abstraction layer; 128-bit protection register secures ECU calibration 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-NHE | Same density (8 Mbit), 70 ns access, but uses different command set and lacks CFI support | No built-in sector lockdown or 128-bit protection register; requires external security for boot code | Choose when legacy SST command compatibility is required and CFI/sector lockdown are not needed |
| MX29LV800CTTI-70G | Pin-compatible TSOP-48, 70 ns, but requires 3.0V ± 0.3V supply (narrower than AT49BV802AT-70TU-T's 2.65–3.6V range) | Supports bottom-boot only; no BYTE pin for dynamic x8/x16 mode switching | Prefer for cost-sensitive designs where voltage margin and interface flexibility are secondary to footprint compatibility |
Compared with SST39VF800A-70-4C-NHE and MX29LV800CTTI-70G, the AT49BV802AT-70TU-T delivers broader voltage tolerance, hardware-enforced sector lockdown, and CFI-driven driver portability - making it superior for secure, field-upgradable embedded systems where boot integrity and runtime configurability are design requirements.
Availability
AT49BV802AT-70TU-T is available at Aetrix Electronics and suitable for industrial control systems, medical device firmware storage, and automotive telematics units requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for AT49BV802AT-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 support for legacy Atmel Flash products including the AT49BV802AT-70TU-T. Microchip is a global leader in microcontrollers, analog, and Flash memory solutions.
The AT49BV802AT-70TU-T belongs to Atmel's legacy parallel-interface Flash memory product line, designed specifically for embedded systems requiring in-system programmability, sector-level security, and robust operation across industrial temperature ranges.
FAQ
What is the difference between AT49BV802A and AT49BV802AT in the AT49BV802AT-70TU-T part number?
The "T" suffix in AT49BV802AT-70TU-T denotes the top-boot block configuration - meaning the smallest 8KB sectors (SA15–SA22) are located at the highest memory addresses (0xF00000–0xFFFFFF), enabling primary boot code storage in upper memory. This differs from the base AT49BV802A, which defaults to bottom-boot. The AT49BV802AT-70TU-T retains all core functionality of the AT49BV802A but guarantees top-boot layout for secure bootloader placement.
Does AT49BV802AT-70TU-T support both x8 and x16 data bus widths?
Yes, AT49BV802AT-70TU-T supports both configurations via the BYTE pin: logic high selects x16 mode (I/O0–I/O15 active), logic low selects x8 mode (I/O0–I/O7 active, with I/O15 repurposed as A-1 address input). This dual-mode capability allows flexible integration with 8-bit or 16-bit microcontroller buses without external glue logic - a key feature confirmed in the device's pin description and block diagram.
How does sector lockdown work on AT49BV802AT-70TU-T, and can locked sectors be unlocked?
Sector lockdown on AT49BV802AT-70TU-T is enabled per sector using the six-cycle Sector Lockdown command (60h). Once locked, a sector becomes read-only until the next power cycle or RESET assertion - there is no software unlock command. This hardware-enforced protection ensures boot code integrity even if firmware is compromised. The AT49BV802AT-70TU-T provides software detection of lockdown status via I/O0 reads at address 00002H within each sector.
What methods does AT49BV802AT-70TU-T provide to detect end-of-program or end-of-erase?
AT49BV802AT-70TU-T offers three concurrent methods: (1) RDY/BUSY pin (open-drain, active-low), (2) Data Polling on I/O7 (complement-to-data or high-assertion depending on config register), and (3) Toggle Bit on I/O6 (toggles during operation, stops when complete). All are documented in the Status Bit Table and supported across all operation modes - enabling robust host-side timing without polling delays.
Is AT49BV802AT-70TU-T compatible with Common Flash Interface (CFI) readers and drivers?
Yes, AT49BV802AT-70TU-T fully implements CFI per JEDEC JESD68. Entering CFI Query mode (98h written to address 55h) exposes standardized parameter tables at fixed offsets, allowing generic flash drivers to auto-detect geometry, timing, and command sets. This eliminates hard-coded algorithms and simplifies migration across Flash vendors - a confirmed capability explicitly stated in Section 4.13 of the datasheet.
AT49BV802AT-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
AT49BV802AT-70TU-T FAQ
1.How can I place an order for AT49BV802AT-70TU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV802AT-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 AT49BV802AT-70TU-T reliable?
The price and inventory of AT49BV802AT-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 AT49BV802AT-70TU-T is usually 5 days.
3.What payment methods are accepted for AT49BV802AT-70TU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV802AT-70TU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV802AT-70TU-T?
AT49BV802AT-70TU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV802AT-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 AT49BV802AT-70TU-T?
For technical support, including AT49BV802AT-70TU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV802AT-70TU-T requirements.
6.How does Aetrix verify that AT49BV802AT-70TU-T is sourced from the original manufacturer or authorized distributors?
All AT49BV802AT-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 AT49BV802AT-70TU-T meets industry standards.
7.What is the process for return or replacement of AT49BV802AT-70TU-T?
All AT49BV802AT-70TU-T units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV802AT-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 AT49BV802AT-70TU-T part is unused and in its original packaging.
Return procedure for AT49BV802AT-70TU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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