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Microchip Technology AT49BV002N-90VI
- Part No.:
- AT49BV002N-90VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV002N-90VI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,396
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Product details
Overview
AT49BV002N-90VI from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply Flash memory IC designed for in-system reprogrammability in industrial embedded systems. It operates from 2.7–3.6 V, delivers 70 ns read access time, supports sector-based erase (10 s chip erase), and features hardware data protection, DATA polling, and a 16 KB boot block with programmable lockout. It is used in firmware storage for microcontroller-based industrial controllers requiring field-upgradable code.
For engineers reviewing the AT49BV002N-90VI datasheet, AT49BV002N-90VI pinout, AT49BV002N-90VI application, or AT49BV002N-90VI equivalent, this page provides verified technical context, package-specific pin functions, real-world use scenarios, and validated alternative parts for industrial-grade Flash memory selection.
Technical Context
The AT49BV002N-90VI implements a standard parallel Flash architecture with CE/OE/WE control logic and internal command register-based programming. Its sector architecture includes one 16 KB boot block (00000H–03FFFH), two 8 KB parameter blocks, and two main memory blocks (96 KB and 128 KB), enabling selective erase without full-chip reset.
It uses standard microprocessor write timing for command sequences (e.g., 6-cycle chip erase, 4-cycle byte program), supports DATA polling on I/O7 and toggle-bit detection on I/O6, and incorporates VCC sense, noise filtering, and input-level inhibition to prevent inadvertent writes. The RESET pin is DC-connected and not functional for boot override in the N-suffix variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - directly maps to 8-bit microcontroller data bus without address translation. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V industrial power rails and battery-backed operation down to 2.7 V. |
| Read Access Time | 90 ns max - meets timing requirements for 11 MHz bus interfaces in legacy industrial controllers. |
| Byte Programming Time | 30 µs typical - enables fast field updates of small configuration or calibration data segments. |
| Erase Cycle Time | 10 seconds max for full chip - allows predictable firmware update windows in unattended systems. |
| Endurance | 10,000 program/erase cycles - sufficient for infrequent firmware upgrades over 10+ year product lifecycles. |
| Standby Current | 50 µA CMOS - minimizes quiescent power in always-on monitoring devices. |
Pinout & Package
AT49BV002N-90VI is supplied in a 32-lead VSOP (8 × 14 mm) package. Pin 9 is a no-connect (NC) terminal per datasheet Rev. 0982D.
| 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, A17 selects upper/lower half. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface compatible with 8051, Z80, and ARM7 legacy microcontrollers; supports read, program, and status polling. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read; enables device decoding in multi-chip memory maps. |
| OE | Output Enable | Active-low output control; used with CE to avoid bus contention during shared-memory access. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing. |
| RESET | Reset Input | DC-connected (not 12 V capable); forces high-impedance outputs and halts ongoing operations - critical for safe system reset during firmware update. |
| VCC | Power Supply | 2.7–3.6 V supply; decoupling required within 10 mm of pin to maintain stable read/write margins. |
| GND | Ground Reference | Signal and power ground return; requires low-inductance connection to minimize noise coupling into I/O lines. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB region (00000H–03FFFH) permanently protected after command sequence - ensures bootloader integrity in safety-critical firmware stacks. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits write), OE/CE/WE state monitoring, and 15 ns noise filter - eliminates spurious writes from EMI or brown-out conditions. |
| DATA Polling & Toggle Bit | I/O7 complement feedback and I/O6 toggling provide real-time program/erase completion detection without external timers or polling overhead. |
| Sector Erase Flexibility | Independent erase of two 8 KB parameter blocks and two main memory blocks - enables modular firmware updates without erasing bootloader or calibration data. |
| Single 3V Supply Operation | No 12 V or 5 V programming voltage required - simplifies power design and eliminates level-shifting circuitry in 3.3 V systems. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments with ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Nonvolatile code storage with guaranteed 90 ns read access and sector-erase capability to support hot-swappable firmware patches. Use Value: Enables field-upgradable ladder logic without replacing PCBs; boot block lockout prevents accidental corruption of core runtime engine. |
Use Scenario: Holding certified bootloader and secure boot keys in Class II medical instruments requiring traceable firmware revision control and tamper resistance. IC Role / Device Role / Timing Role: Trusted execution environment (TEE) initialization memory with hardware-enforced write protection for regulatory compliance (IEC 62304). Use Value: Prevents unauthorized modification of boot code via physical interface; 10,000-cycle endurance supports full lifecycle validation and periodic security audits. |
| Automotive Diagnostic Module | Energy Meter Firmware Archive |
Use Scenario: Storing OBD-II diagnostic routines and vehicle-specific calibration tables in aftermarket scan tools operating across -40°C to +85°C temperature range. IC Role / Device Role / Timing Role: Field-programmable Flash memory interfaced to 8-bit MCU via parallel bus; supports in-vehicle firmware updates via CAN gateway. Use Value: 2.7–3.6 V operation tolerates automotive battery fluctuations; 50 µA standby current extends handheld tool battery life between updates. |
Use Scenario: Archiving firmware revisions and tariff tables in ANSI C12.22-compliant smart electricity meters installed in outdoor utility enclosures. IC Role / Device Role / Timing Role: Long-term nonvolatile storage with sector-level erase for regulatory-mandated firmware rollback capability. Use Value: 10-second chip erase enables rapid recovery from corrupted updates; boot block lockout preserves meter certification signature during field service. |
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 | 2 Mbit, 3.0–3.6 V, 90 ns access, same 32-pin TSOP/VSOP footprint but lacks boot block lockout and uses different command set. | Requires firmware driver rewrite; no hardware-protected boot region - unsuitable where bootloader integrity is mandated. | Select only if existing SST39VF200A drivers are available and boot protection is handled in software. |
| MX29LV200CBTI-90G | 2 Mbit, 2.7–3.6 V, 90 ns access, includes CFI-compliant command set and 16 KB boot sector with lockout, but uses different sector map (top/bottom boot). | Compatible pinout and voltage; boot sector at top (3C000H–3FFFFH) vs. AT49BV002N-90VI's bottom boot (00000H–03FFFH) - requires address remapping in linker script. | Preferred for new designs needing CFI compatibility and extended endurance (100K cycles), but verify boot address alignment in firmware. |
Compared with SST39VF200A-90-4C-NHE, AT49BV002N-90VI offers hardware-enforced boot protection critical for safety-certified systems; compared with MX29LV200CBTI-90G, it provides bottom-boot addressing that simplifies legacy 8051-based linker configurations without relocation.
Availability
AT49BV002N-90VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, automotive diagnostic modules, and energy meter firmware archive applications requiring stable component supply across extended temperature ranges.
Supply support for AT49BV002N-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 full support for legacy Atmel Flash memory products including the AT49BV series.
The AT49BV002N-90VI belongs to Atmel's Battery-Voltage™ Flash family, engineered for reliable in-system reprogramming in industrial and automotive environments where single-supply operation and data retention under voltage fluctuation are essential.
FAQ
What is the operating temperature range for the AT49BV002N-90VI?
The AT49BV002N-90VI is rated for industrial temperature operation from –40°C to +85°C, as confirmed by its ordering code suffix "I" and the DC/AC operating range table in datasheet Rev. 0982D. This makes it suitable for deployment in harsh environments such as factory floors and outdoor utility meters where thermal stability is critical. The AT49BV002N-90VI maintains full 90 ns read access and 30 µs byte programming performance across this entire range.
Does the AT49BV002N-90VI support 12 V RESET-based boot block override?
No, the AT49BV002N-90VI does not support 12 V RESET override for boot block reprogramming. As explicitly stated in the datasheet, the RESET pin is a DC connection (not voltage-tolerant) and the boot block lockout override feature is unavailable on all N-suffix variants including AT49BV002N-90VI. Once enabled, the 16 KB boot block (00000H–03FFFH) becomes permanently write-protected at standard VCC levels.
What package type is used for the AT49BV002N-90VI?
The AT49BV002N-90VI uses a 32-lead Very Small Outline Package (VSOP) measuring 8 mm × 14 mm, designated as package code "32V" in Atmel's ordering information. Pin 9 is a no-connect (NC), and the package supports surface-mount reflow assembly with JEDEC-standard thermal profiles. This compact footprint is optimized for space-constrained industrial control modules.
How is the boot block protected on the AT49BV002N-90VI?
The AT49BV002N-90VI implements boot block protection via a six-byte command sequence (5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → 5555H/40H) that permanently disables programming and erasure of the 16 KB region at addresses 00000H–03FFFH. Once activated, the AT49BV002N-90VI rejects all write commands to this sector even under valid VCC and timing conditions.
Can the AT49BV002N-90VI be used as a direct replacement for the AT49LV002N-90VI?
No, the AT49BV002N-90VI is not a direct replacement for the AT49LV002N-90VI due to differing supply voltage ranges: AT49BV002N-90VI operates from 2.7–3.6 V, while AT49LV002N-90VI requires 3.0–3.6 V. Systems powered at exactly 2.7–2.99 V will function with AT49BV002N-90VI but may fail to program or read reliably with AT49LV002N-90VI. Voltage margin verification is required before substitution.
AT49BV002N-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
AT49BV002N-90VI FAQ
1.How can I place an order for AT49BV002N-90VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002N-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 AT49BV002N-90VI reliable?
The price and inventory of AT49BV002N-90VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002N-90VI is usually 5 days.
3.What payment methods are accepted for AT49BV002N-90VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002N-90VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002N-90VI?
AT49BV002N-90VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002N-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 AT49BV002N-90VI?
For technical support, including AT49BV002N-90VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002N-90VI requirements.
6.How does Aetrix verify that AT49BV002N-90VI is sourced from the original manufacturer or authorized distributors?
All AT49BV002N-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 AT49BV002N-90VI meets industry standards.
7.What is the process for return or replacement of AT49BV002N-90VI?
All AT49BV002N-90VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002N-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 AT49BV002N-90VI part is unused and in its original packaging.
Return procedure for AT49BV002N-90VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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