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Microchip Technology AT49BV002NT-12VC
- Part No.:
- AT49BV002NT-12VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV002NT-12VC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,645
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Product details
Overview
AT49BV002NT-12VC from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 3V-only Flash memory IC used for nonvolatile code and data storage in embedded systems. It features 70 ns read access time, 10-second chip erase, byte-programmable architecture with sector protection, and operates across industrial temperature range (–40°C to +85°C). It is commonly deployed in firmware boot storage for microcontroller-based industrial controllers.
For engineers reviewing the AT49BV002NT-12VC datasheet, AT49BV002NT-12VC pinout, AT49BV002NT-12VC application, or AT49BV002NT-12VC equivalent, key selection considerations include its 32-pin VSOP package, boot block lockout capability, DATA polling/Toggle Bit programming status detection, and compatibility with standard 5V-command protocols despite 3V operation.
Technical Context
This device implements a sector-organized Flash architecture with one 16 KB boot block (address 3C000H–3FFFFH), two 8 KB parameter blocks, and two main memory blocks (96 KB and 128 KB). It uses standard CE/OE/WE control logic identical to EPROMs, enabling drop-in replacement in legacy designs without bus contention.
Programming and erase operations are executed via six-byte command sequences written to specific address/data latches (e.g., 5555H/AAH, 2AAAH/55H). The RESET pin supports 12 V override of boot block lockout - a feature confirmed active on AT49BV002NT variants per datasheet Rev. 0982D, Section 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), organized as 262,144 words × 8 bits - matches standard 8-bit microcontroller data bus width. |
| Read Access Time | 120 ns (tACC) - defines maximum clock rate for reliable read cycles in timing-critical firmware fetch paths. |
| Supply Voltage | 2.7 V to 3.6 V - enables direct connection to 3.3 V system rails without level-shifting or charge pumps. |
| Byte Programming Time | 30 µs typical - determines minimum write latency per byte during field firmware updates. |
| Erase Cycle Time | 10 seconds max for full chip erase - sets worst-case downtime during reprogramming events. |
| End-of-Write Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Endurance | 10,000 program/erase cycles - specifies lifetime limit for field-upgradable applications requiring frequent updates. |
| Standby Current | 50 µA CMOS - ensures ultra-low power retention in battery-backed or energy-sensitive systems. |
Pinout & Package
AT49BV002NT-12VC is supplied in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm body, 0.5 mm lead pitch, RoHS-compliant. Pin 1 is located at bottom-left corner (marking dot adjacent), with pins numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A15 used for byte-level access, A16/A17 select sectors. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface compatible with 8051, Z80, and ARM7 bus protocols; high-impedance when CE or OE inactive. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read output - prevents bus contention in multi-device systems. |
| OE | Output Enable | Active-low output gate; allows shared data bus usage by enabling outputs only during valid read windows. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling edge for command sequencing and byte programming. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot block override - confirmed functional on AT49BV002NT variant. |
| VCC | Power Supply | +2.7 V to +3.6 V supply; powers core logic and I/O buffers; decoupling capacitor required per datasheet layout guidelines. |
| GND | Ground Reference | Signal and power ground reference; requires low-inductance connection to minimize noise during erase/write transitions. |
| DC | No Connect | Pin 9 in TSOP/VSOP packages - must remain unconnected; floating or driven states may cause undefined behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 16 KB protected region (3C000H–3FFFFH) prevents accidental overwrite of bootloader code; enabled via 6-byte command sequence. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock (OE low/CE high/WE high blocks writes). |
| Sector Erase Flexibility | Independent erasure of two 8 KB parameter blocks and two main memory blocks (96 KB/128 KB) enables modular firmware updates without full chip erase. |
| 12 V RESET Override | Applying 12 V ±0.5 V to RESET pin during erase/program bypasses boot block lockout - verified for AT49BV002NT in datasheet Section 3. |
| Standard Command Interface | Uses industry-standard 5V-level command protocol (e.g., 5555H/AAH) over 3V supply - simplifies integration with existing 5V-programmer hardware. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing boot firmware and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to CPU address space; provides deterministic 120 ns read access for fast startup and real-time task initialization. Use Value: Sector protection isolates bootloader from field-upgraded application code; 10,000-cycle endurance supports long-term deployment without replacement. |
Use Scenario: Holding certified bootloader and calibration data in Class II medical instruments requiring traceable firmware revisions. IC Role / Device Role / Timing Role: Secure, lockable code storage with hardware-enforced write inhibition; RESET-driven 12 V override enables authorized reprogramming during service. Use Value: Boot block lockout prevents unauthorized modification; DATA polling eliminates software timing uncertainty during critical firmware updates. |
| Automotive ECU Parameter Storage | Network Router Configuration Memory |
Use Scenario: Retaining engine calibration maps and diagnostic settings in automotive electronic control units operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade Flash memory interfaced via standard microcontroller GPIO; withstands thermal cycling and voltage transients per AEC-Q100 stress profiles. Use Value: 50 µA standby current extends battery backup life; 2.7–3.6 V operation aligns with automotive 3.3 V domain supplies. |
Use Scenario: Storing routing tables, security certificates, and firmware images in enterprise-grade network infrastructure equipment. IC Role / Device Role / Timing Role: System-level configuration storage accessed during boot and runtime; supports in-system reprogramming without board removal. Use Value: VSOP package enables high-density PCB layout; Toggle Bit detection simplifies host driver development for concurrent status monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF200A-70-4C-NHE | 4 Mbit density (512K × 8), 70 ns access, 3.0–3.6 V supply; no 12 V RESET override; boot block at 00000H–03FFFH. | Larger capacity suits extended firmware; lacks boot block override - unsuitable where secure field reprogramming of bootloader is required. | Select when higher density and faster access are prioritized over boot block flexibility. |
| MX29LV200CBTI-70G | 2 Mbit (256K × 8), 70 ns access, 3.0–3.6 V; boot block at 00000H–03FFFH; no 12 V RESET function; supports CFI query mode. | CFI compliance simplifies auto-detection in generic flash programmers; missing 12 V override limits bootloader update options in locked-down systems. | Choose for CFI-aware toolchains and where standardized identification is needed over hardware-level boot protection control. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CBTI-70G, AT49BV002NT-12VC uniquely offers 12 V RESET-driven boot block override and industrial-temp 120 ns timing - critical for legacy-compatible, security-sensitive embedded reprogramming.
Availability
AT49BV002NT-12VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and automotive ECU parameter storage requiring stable component supply across extended lifecycle programs.
Supply support for AT49BV002NT-12VC 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 manufacturing continuity for the AT49BV/LV series. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for industrial and automotive markets.
The AT49BV002NT belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable, low-voltage in-system reprogrammability in resource-constrained embedded systems with stringent power and security requirements.
FAQ
What is the correct boot block address range for AT49BV002NT-12VC?
The boot block address range for AT49BV002NT-12VC is 3C000H to 3FFFFH (16 KB), as confirmed in datasheet Rev. 0982D, Section 6, Note 2. This differs from non-T variants (e.g., AT49BV002N), which use 00000H–03FFFH. The T suffix denotes top-boot configuration, and this mapping is fixed for AT49BV002NT-12VC.
Does AT49BV002NT-12VC support 12 V programming override on the RESET pin?
Yes, AT49BV002NT-12VC supports 12 V ±0.5 V applied to the RESET pin to override boot block lockout during chip erase, sector erase, or byte programming - explicitly documented in Section 3 ("RESET") and Section 4 ("BOOT BLOCK PROGRAMMING LOCKOUT OVERRIDE") of the official datasheet.
What package type is used for AT49BV002NT-12VC?
AT49BV002NT-12VC uses a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm body size, with 0.5 mm lead pitch. This is confirmed in the "AT49BV002NT Ordering Information" table (page 20) and "Package Type" legend (page 14) of the datasheet.
How does AT49BV002NT-12VC detect end-of-program without polling delay loops?
AT49BV002NT-12VC provides two hardware methods: DATA polling (I/O7 returns complement of written data until completion) and Toggle Bit (I/O6 toggles between 0/1 during operation and stabilizes upon finish). Both are fully supported and require no fixed timing delays in host firmware.
Is AT49BV002NT-12VC compatible with standard 5V EPROM programmers?
AT49BV002NT-12VC uses standard 5V-level command sequences (e.g., 5555H/AAH) but operates from a 2.7–3.6 V supply. While many 5V EPROM programmers can drive the address/data/control lines, they must not apply 5V to VCC - external 3.3 V regulation is mandatory. Hardware design must isolate VCC from programmer voltage rails.
AT49BV002NT-12VC 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:
- 120 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-12VC FAQ
1.How can I place an order for AT49BV002NT-12VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002NT-12VC 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-12VC reliable?
The price and inventory of AT49BV002NT-12VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002NT-12VC is usually 5 days.
3.What payment methods are accepted for AT49BV002NT-12VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002NT-12VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002NT-12VC?
AT49BV002NT-12VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002NT-12VC 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-12VC?
For technical support, including AT49BV002NT-12VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002NT-12VC requirements.
6.How does Aetrix verify that AT49BV002NT-12VC is sourced from the original manufacturer or authorized distributors?
All AT49BV002NT-12VC 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-12VC meets industry standards.
7.What is the process for return or replacement of AT49BV002NT-12VC?
All AT49BV002NT-12VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002NT-12VC, 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-12VC part is unused and in its original packaging.
Return procedure for AT49BV002NT-12VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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