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Microchip Technology AT49BV002NT-90VC
- Part No.:
- AT49BV002NT-90VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV002NT-90VC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,425
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Product details
Overview
AT49BV002NT-90VC from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory with 90 ns read access time, 10-second chip erase cycle, and sector-based architecture including a 16 KB boot block with programmable lockout. It supports embedded firmware storage in industrial controllers requiring nonvolatile code retention and field-upgradable BIOS or bootloader images.
For engineers reviewing the AT49BV002NT-90VC datasheet, AT49BV002NT-90VC pinout, AT49BV002NT-90VC application, or AT49BV002NT-90VC equivalent, key selection criteria include boot-block protection capability, 3.3 V-only operation without high-voltage programming, DATA polling/Toggle Bit for program/erase status detection, and compatibility with standard microprocessor bus timing (CE/OE/WE control).
Technical Context
This device implements a command-register-based architecture using six-byte software command sequences for chip erase, sector erase, byte programming, and boot-block lockout enablement. Its memory array is partitioned into one 16 KB boot block (address range 3C000H–3FFFFH), two 8 KB parameter blocks, and two main memory blocks (96 KB and 128 KB), enabling selective erasure without affecting protected firmware regions.
Hardware data protection includes VCC sense (program inhibited below 1.8 V), noise filtering on WE/CE (rejects <15 ns pulses), and active inhibit via OE low / CE high / WE high states. The RESET pin supports both standard reset and 12 V override of boot-block lockout - though this override is disabled on the N(T) variant per documentation note.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8 bits), organized as 262,144 words × 8 |
| Supply Voltage | 2.7 V to 3.6 V - enables direct interface with 3.3 V logic without level shifters |
| Read Access Time | 90 ns - determines maximum sustained read throughput in microprocessor bus cycles |
| Byte Programming Time | 30 µs typical - defines minimum interval between successive byte writes during firmware update |
| Erase Cycle Time | 10 seconds max - sets worst-case latency for full-chip or sector-level reinitialization |
| End-of-Operation Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed-timing delays in host firmware |
| Write Endurance | 10,000 program/erase cycles - specifies lifetime under repeated field updates |
| Standby Current | 50 µA CMOS - enables ultra-low-power retention in battery-backed systems |
Pinout & Package
AT49BV002NT-90VC is packaged in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm body, JEDEC-standard footprint compatible with TSOP-32 but with thinner profile and tighter pitch. Pin 1 is marked by notch or dot; pin 9 is NC (not connected) for VSOP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing (218 = 262,144) |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; latched on rising edge of WE/CE during write, driven during read when CE/OE low |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access |
| OE | Output Enable | Active-low output gate; controls data bus drive to avoid contention when multiple devices share bus |
| WE | Write Enable | Active-low write strobe; falling edge latches address, rising edge latches data during programming |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V override disabled on NT variant |
| VCC | Power Supply | 2.7–3.6 V core supply; powers internal logic, charge pumps, and I/O buffers |
| GND | Ground Reference | Signal and power return path; decoupling capacitor required within 10 mm of VCC pin |
| DC | No Connect | Pin 9 in VSOP package - must remain unconnected and unstubbed on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | Enables permanent protection of 16 KB boot code (3C000H–3FFFFH) while allowing field updates to parameter and application sectors |
| Single 2.7–3.6 V Supply Operation | Eliminates need for 5 V or 12 V programming voltages - simplifies power design and enables direct connection to 3.3 V microcontrollers |
| DATA Polling & Toggle Bit Status Reporting | Allows host processor to poll completion asynchronously without fixed timeouts or external busy signals |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibit prevent accidental writes during power transients or EMI events |
| Standard Microprocessor Interface | CE/OE/WE timing compliant with common 8051, Z80, and ARM bus protocols - no custom controller logic required |
Applications
| Industrial PLC Firmware Storage | Embedded Network Router Bootloader |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with guaranteed 10,000 write cycles and 50 µA standby current for battery-backed retention during power loss. Use Value: Sector erase allows updating application firmware without disturbing locked boot code, ensuring system recovery after failed updates. |
Use Scenario: Hosting secure bootloader and fail-safe recovery image in enterprise-grade network routers requiring remote firmware upgrades. IC Role / Device Role / Timing Role: Boot block (3C000H–3FFFFH) stores immutable startup code; parameter blocks store MAC addresses and calibration data. Use Value: Boot-block lockout prevents corruption during over-the-air updates, maintaining system integrity even if main memory is overwritten. |
| Medical Device Configuration Memory | Automotive Diagnostic Tool Firmware |
Use Scenario: Retaining calibrated sensor offsets and user preferences in portable medical instruments with long shelf life and infrequent updates. IC Role / Device Role / Timing Role: Low-power Flash memory with 50 µA CMOS standby current and 2.7 V minimum VCC for coin-cell backup operation. Use Value: 10-second erase and 30 µs byte programming enable fast recalibration uploads during service without extended downtime. |
Use Scenario: Storing protocol stacks and vehicle-specific diagnostic routines in handheld OBD-II tools used across diverse automotive platforms. IC Role / Device Role / Timing Role: Field-upgradable firmware storage with hardware write protection to prevent accidental corruption during CAN bus communication bursts. Use Value: Hardware data protection (VCC sense, noise filter) ensures reliability in electrically noisy vehicle environments. |
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 | Same density (2 Mbit), 90 ns access, 3.0–3.6 V supply; uses different command set and lacks boot-block lockout override | No 12 V RESET override; boot protection implemented via software-only method without hardware fallback | Select when strict Atmel command compatibility is not required and simpler protection model suffices |
| MX29LV200CTTI-90G | 2 Mbit, 90 ns, 3.0–3.6 V; includes CFI-compliant query mode and wider temperature range (–40°C to +85°C industrial) | CFI support enables automatic identification by generic flash programmers; no dedicated boot-block lockout feature | Select for systems requiring standardized flash interrogation or broader operating temperature compliance |
Compared with SST39VF200A-90-4C-NHE and MX29LV200CTTI-90G, the AT49BV002NT-90VC provides unique boot-block lockout with hardware-enforced protection and documented 12 V override capability (though disabled on NT variant), making it preferable for safety-critical boot firmware where deterministic write inhibition is mandatory.
Availability
AT49BV002NT-90VC is available at Aetrix Electronics and suitable for industrial automation controllers, embedded networking equipment, and medical instrumentation requiring stable component supply, long-term lifecycle support, and verified Flash memory performance under extended temperature operation.
Supply support for AT49BV002NT-90VC 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 datasheets, application notes, and qualified manufacturing lines.
The AT49BV/LV002(N)(T) family was designed specifically for embedded systems requiring in-system reprogrammability without high-voltage programming circuitry, targeting cost-sensitive, space-constrained applications such as consumer electronics, industrial HMI, and automotive subsystems.
FAQ
What is the boot block address range for AT49BV002NT-90VC?
The boot block for AT49BV002NT-90VC occupies address range 3C000H to 3FFFFH (16 KB). This differs from the base AT49BV002(N) variant, which locates the boot block at 00000H–03FFFH. The T-suffix denotes top-boot architecture, placing protected firmware at the highest memory addresses - a layout preferred for modern microcontroller boot vector mapping.
Does AT49BV002NT-90VC support 12 V RESET override of boot-block lockout?
No. The AT49BV002NT-90VC does not support 12 V override of boot-block lockout. Per the datasheet note on page 2, "The RESET feature is not available on the AT49BV/LV002N(T)", and the NT suffix confirms inclusion of the N(T) variant. Once enabled, boot-block lockout is permanent under normal 2.7–3.6 V operation.
What package type is used for AT49BV002NT-90VC?
AT49BV002NT-90VC uses a 32-lead Very Small Outline Package (VSOP) measuring 8 mm × 14 mm. It is pin-compatible with TSOP-32 but features a thinner profile and finer pitch, optimized for compact PCB layouts in space-constrained embedded designs.
How is end-of-program detection implemented in AT49BV002NT-90VC?
AT49BV002NT-90VC supports two hardware-assisted end-of-operation detection methods: DATA polling (reading the target address returns complemented data on I/O7 until completion) and Toggle Bit (I/O6 toggles between 0 and 1 during programming/erasing, then stabilizes). Both allow the host to poll status without fixed delays or external busy signals.
What is the difference between AT49BV002NT-90VC and AT49BV002T-90VC?
The "N" in AT49BV002NT-90VC indicates the N(T) variant, which disables the 12 V RESET override function and fixes pin 1 (DIP/PLCC) or pin 9 (TSOP/VSOP) as NC (no connect). The base AT49BV002T-90VC retains RESET functionality and uses those pins for RESET input. All other electrical and timing specifications remain identical.
AT49BV002NT-90VC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49BV002NT-90VC FAQ
1.How can I place an order for AT49BV002NT-90VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002NT-90VC 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-90VC reliable?
The price and inventory of AT49BV002NT-90VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002NT-90VC is usually 5 days.
3.What payment methods are accepted for AT49BV002NT-90VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002NT-90VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002NT-90VC?
AT49BV002NT-90VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002NT-90VC 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-90VC?
For technical support, including AT49BV002NT-90VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002NT-90VC requirements.
6.How does Aetrix verify that AT49BV002NT-90VC is sourced from the original manufacturer or authorized distributors?
All AT49BV002NT-90VC 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-90VC meets industry standards.
7.What is the process for return or replacement of AT49BV002NT-90VC?
All AT49BV002NT-90VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002NT-90VC, 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-90VC part is unused and in its original packaging.
Return procedure for AT49BV002NT-90VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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