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Microchip Technology AT49BV002NT-90VI
- Part No.:
- AT49BV002NT-90VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV002NT-90VI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,427
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Product details
Overview
AT49BV002NT-90VI from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It delivers 90 ns read access time, 10-second chip erase, 30 µs/byte programming, 10,000 write cycles, and hardware data protection - deployed in industrial firmware boot loaders requiring secure, field-upgradable storage.
For engineers reviewing the AT49BV002NT-90VI datasheet, AT49BV002NT-90VI pinout, AT49BV002NT-90VI application, or AT49BV002NT-90VI equivalent, key selection criteria include boot block lockout behavior, sector architecture (16K boot + dual 8K parameter + dual main blocks), TSOP/VSOP package compatibility, industrial temperature support (−40°C to +85°C), and 32-pin address/data multiplexing interface timing.
Technical Context
The AT49BV002NT-90VI implements a standard parallel Flash architecture with CE/OE/WE control logic, supporting EPROM-like read operation and command-based byte programming and sector/chip erase. Its internal program controller manages pulse generation and timing without external high-voltage circuitry.
It features a fixed 16K-byte boot block at address 3C000H–3FFFFH (T-suffix variant), two 8K-byte parameter blocks, and two main memory blocks (96K + 128K bytes). Boot block lockout is enabled via six-cycle command sequence and can be overridden only by applying 12 V to RESET - a feature absent in N-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - supports full firmware image storage for 8-bit/16-bit MCUs. |
| Supply Voltage | 2.7 V to 3.6 V - enables direct battery-voltage operation (e.g., single Li-ion or 3×AA) without regulator overhead. |
| Read Access Time | 90 ns max - ensures deterministic timing for real-time boot code fetch in industrial controllers. |
| Erase Cycle Time | 10 seconds typical for full chip erase - balances speed and reliability for infrequent field updates. |
| Byte Programming Time | 30 µs typical - enables rapid patching of configuration or calibration data without system downtime. |
| End-of-Program Detection | DATA polling (I/O7 complement) or Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Write Endurance | 10,000 program/erase cycles - validated for long-life deployment in programmable logic controllers and HMI modules. |
| Operating Temperature | −40°C to +85°C - qualified for industrial ambient environments including factory automation and outdoor metering. |
Pinout & Package
AT49BV002NT-90VI is supplied in a 32-lead Thin Small Outline Package (TSOP, Type I, 8 mm × 20 mm) per ordering code suffix "VI". Pin 9 is a no-connect (NC) in TSOP configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A16 used for byte-level access within sectors. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path for read, program, and identification modes; TTL-compatible I/O levels. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - prevents bus contention. |
| OE | Output Enable | Active-low output control; allows data hold during multi-cycle operations without disabling CE. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle timing. |
| RESET | Reset Input | Active-low reset halts ongoing operations; 12 V override enables boot block reprogramming - not available on N-suffix parts. |
| VCC | Power Supply | 2.7–3.6 V supply; internal voltage sensing disables programming if VCC drops below ~1.8 V. |
| GND | Ground Reference | Signal and power ground reference for all I/O and internal logic; decoupling required per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte region (3C000H–3FFFFH) permanently protected after command activation - secures bootloader integrity against accidental overwrite. |
| Sector Erase Flexibility | Independent erase of two 8K parameter blocks and two main memory blocks (96K/128K) - enables modular firmware updates without full chip erase. |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulse rejection), and three-line inhibit (OE high / CE high / WE high) prevent spurious writes in noisy industrial environments. |
| DATA Polling & Toggle Bit | Dual end-of-program detection methods eliminate polling delays and simplify host MCU firmware - no external timing components required. |
| Low Power Standby | 50 µA CMOS standby current - extends battery life in always-on edge devices such as smart sensors and remote telemetry units. |
| Industrial Temperature Range | Rated −40°C to +85°C with full AC/DC specifications - suitable for uncontrolled enclosures in manufacturing, energy, and transportation systems. |
Applications
| Industrial PLC Firmware Storage | Embedded HMI Boot Loader |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory-floor cabinets with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; provides deterministic 90 ns read access for fast boot and instruction fetch. Use Value: Boot block lockout prevents corruption of critical startup routines during field firmware upgrades, ensuring system reliability across 10,000+ update cycles. |
Use Scenario: Hosting boot code and GUI assets for human-machine interface panels in HVAC control systems operating continuously in commercial buildings. IC Role / Device Role / Timing Role: Dual-sector architecture isolates parameter blocks (calibration, language packs) from main application code - enabling independent updates. Use Value: Sector erase capability reduces update time versus full-chip erase, minimizing panel downtime during scheduled maintenance windows. |
| Smart Meter Boot Memory | Medical Device Configuration Storage |
Use Scenario: Secure storage of metrology firmware and cryptographic keys in ANSI C12.22-compliant electricity meters exposed to outdoor thermal cycling. IC Role / Device Role / Timing Role: Industrial-grade Flash with 12 V RESET override allows recovery of locked boot block if corrupted - critical for regulatory compliance. Use Value: Hardware data protection (VCC sense, noise filter) prevents false writes during power brownouts common in grid-edge deployments. |
Use Scenario: Retaining device-specific calibration coefficients and safety-critical configuration parameters in portable diagnostic equipment with battery backup. IC Role / Device Role / Timing Role: Low 50 µA standby current preserves battery charge during extended idle periods between patient sessions. Use Value: 10,000 write cycles and verified −40°C to +85°C operation ensure long-term data integrity across clinical lifecycle requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF200A-90-4C-NHE | 4 Mbit density (512K × 8), 90 ns access, 3.0–3.6 V supply; lacks boot block lockout override via RESET pin. | Higher capacity suits larger firmware images but requires redesign for address space expansion; no 12 V boot recovery path. | Select when additional memory headroom is needed and boot block override is unnecessary. |
| MX29LV200CTTI-90G | 2 Mbit (256K × 8), 90 ns, 3.0–3.6 V; includes CFI query mode and uniform 64K sectors - no dedicated boot block or 12 V override. | CFI support simplifies auto-detection in generic programmers; sector uniformity eases porting but removes boot-specific protection granularity. | Select for standardized CFI-based toolchains where boot block differentiation is not required. |
Compared with SST39VF200A-90-4C-NHE and MX29LV200CTTI-90G, the AT49BV002NT-90VI uniquely combines industrial temperature rating, dedicated 16K boot block with 12 V override, and proven 10,000-cycle endurance - making it optimal for safety-critical, field-upgradable embedded systems where boot integrity is non-negotiable.
Availability
AT49BV002NT-90VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded HMI boot loader implementation, and smart meter boot memory requiring stable component supply across extended product lifecycles.
Supply support for AT49BV002NT-90VI 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 legacy Flash product lines with full technical documentation and long-term supply commitment.
The AT49BV/LV002(N)(T) family was designed specifically for cost-sensitive, battery-operated, and industrial embedded systems requiring reliable in-system reprogrammability without high-voltage programming circuitry.
FAQ
What is the boot block address range for AT49BV002NT-90VI?
The AT49BV002NT-90VI uses the "T" suffix variant, which places its 16K-byte boot block at address range 3C000H to 3FFFFH. This differs from the base AT49BV002N (non-T) version, whose boot block resides at 00000H–03FFFH. The T-suffix layout optimizes memory mapping for systems requiring contiguous high-address boot code.
Does AT49BV002NT-90VI support 12 V RESET override for boot block reprogramming?
Yes, AT49BV002NT-90VI supports 12 V ±0.5 V applied to the RESET pin to override boot block lockout during chip erase, sector erase, or byte programming. This feature is explicitly documented for the "T" suffix and is not available on "N"-suffix variants like AT49BV002N-90VI.
What package type does AT49BV002NT-90VI use, and is pin 9 connected?
AT49BV002NT-90VI uses a 32-lead TSOP (Type I, 8 mm × 20 mm) package. Per the datasheet, pin 9 is designated "Don't Connect" (NC) for TSOP and VSOP packages - it must remain unconnected in PCB layout to avoid functional interference.
How does hardware data protection work in AT49BV002NT-90VI?
AT49BV002NT-90VI implements three hardware protections: (1) VCC sense inhibits programming if supply drops below ~1.8 V; (2) any of OE high, CE high, or WE high disables write cycles; and (3) input noise filter rejects pulses <15 ns on WE/CE. These prevent unintended writes in electrically noisy industrial settings.
Can AT49BV002NT-90VI be used in place of AT49BV002N-90VI?
No - AT49BV002NT-90VI and AT49BV002N-90VI are not functionally interchangeable. The "T" suffix denotes relocated boot block (3C000H–3FFFFH vs. 00000H–03FFFH) and inclusion of 12 V RESET override, while the "N" suffix omits both. Substitution requires firmware and hardware validation due to address map and feature differences.
AT49BV002NT-90VI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49BV002NT-90VI FAQ
1.How can I place an order for AT49BV002NT-90VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002NT-90VI 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 AT49BV002NT-90VI reliable?
The price and inventory of AT49BV002NT-90VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002NT-90VI is usually 5 days.
3.What payment methods are accepted for AT49BV002NT-90VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002NT-90VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002NT-90VI?
AT49BV002NT-90VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002NT-90VI 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 AT49BV002NT-90VI?
For technical support, including AT49BV002NT-90VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002NT-90VI requirements.
6.How does Aetrix verify that AT49BV002NT-90VI is sourced from the original manufacturer or authorized distributors?
All AT49BV002NT-90VI 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 AT49BV002NT-90VI meets industry standards.
7.What is the process for return or replacement of AT49BV002NT-90VI?
All AT49BV002NT-90VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002NT-90VI, 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 AT49BV002NT-90VI part is unused and in its original packaging.
Return procedure for AT49BV002NT-90VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV002NT-90VI Tags
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