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Microchip Technology AT49BV002N-12VC
- Part No.:
- AT49BV002N-12VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV002N-12VC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,481
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Product details
Overview
AT49BV002N-12VC from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 2.7–3.6V in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It delivers 120 ns read access time, 10-second chip erase, byte-programming at 30 µs/byte typical, 10,000 write cycles, and hardware data protection - deployed in boot code storage, firmware update partitions, and parameter retention in industrial controllers.
For engineers reviewing the AT49BV002N-12VC datasheet, AT49BV002N-12VC pinout, AT49BV002N-12VC application, or AT49BV002N-12VC equivalent, key selection considerations include its 32-pin VSOP package, boot block lockout capability, sector-based erase architecture (16K boot + two 8K parameter + two main memory blocks), and compatibility with standard EPROM-like bus interface timing.
Technical Context
The AT49BV002N-12VC implements a command-register-based programming model using six-byte sequences (e.g., 5555H/AAH → 2AAAH/55H → 5555H/80H → ...) to initiate erase and program operations without requiring high-voltage VPP. Its internal logic supports DATA polling (I/O7 complement) and Toggle Bit (I/O6) methods for cycle completion detection.
It features dedicated hardware protection: VCC sense inhibits programming below 1.8V, noise filtering rejects <15 ns pulses on WE/CE, and control-line gating (OE low / CE high / WE high) prevents accidental writes. The RESET pin is DC-connected (not functional for reset or boot override) per the "N" variant designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - sufficient for full bootloader + configuration tables in resource-constrained MCU systems. |
| Read Access Time | 120 ns max - meets timing requirements for 8-bit microcontrollers running at ≤8 MHz with wait-state-free operation. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V logic rails and battery-backed operation down to 2.7 V without level-shifting. |
| Erase Time | 10 seconds typical for full chip erase - enables field firmware updates with predictable timeout handling in host firmware. |
| Program Time | 30 µs/byte typical - allows efficient incremental patching of configuration or calibration data without long blocking delays. |
| Endurance | 10,000 program/erase cycles - supports multi-year field updates in industrial HMI, PLC I/O modules, and medical device calibration storage. |
| Standby Current | 50 µA CMOS - enables ultra-low-power sleep modes in battery-operated edge sensors and portable instrumentation. |
Pinout & Package
AT49BV002N-12VC uses a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm body, 0.5 mm lead pitch, JEDEC MO-178AC compliant. Pin 1 is index corner (top-left when notch faces up); pin 9 is NC (Not Connected).
| 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 in dual-block configurations. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface compatible with 8051, AVR, and ARM Cortex-M GPIO buses; supports true read/write without external transceivers. |
| CE | Chip Enable | Active-low chip select; enables device decoding in multi-peripheral systems; must be stable before address setup for valid access. |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention during shared-memory access or DMA transfers. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing; critical for reliable byte programming. |
| RESET | Reset Input | DC-connected (no reset function); tied high internally - not usable for hardware reset or boot override (unlike T variants). |
| VCC | Power Supply | Single 2.7–3.6 V supply; decoupling capacitor (0.1 µF ceramic) required within 5 mm for stable 120 ns read timing. |
| GND | Ground Reference | Dedicated ground pin; must be connected to system analog/digital ground plane with low-inductance path to minimize read noise. |
| DC (Pin 9) | No Connect | Internally unconnected; must remain floating - no pull-up/down or routing to avoid parasitic coupling or ESD risk. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB protected region (00000H–03FFFH) prevents accidental overwrite of bootloader code; enabled via 6-byte command sequence; irreversible under 5.5 V. |
| Sector Erase Architecture | 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. |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggle provide real-time, software-driven program/erase completion detection - eliminates need for fixed delay loops or external timers. |
| Hardware Write Protection | VCC sense, noise filtering (<15 ns), and control-line gating (OE/CE/WE states) collectively prevent spurious writes during power transients or EMI events. |
| EPROM-Compatible Interface | Standard CE/OE/WE control signals and timing allow drop-in replacement of UV-erasable EPROMs in legacy designs without PCB or firmware changes. |
Applications
| Industrial PLC Firmware Storage | Medical Device Calibration Data Retention |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controller CPU modules that require field-upgradable logic without hardware intervention. IC Role / Device Role / Timing Role: Nonvolatile code storage IC providing boot code execution and runtime parameter persistence; operates at 120 ns read speed synchronized to 8-bit bus clock. Use Value: Enables secure, in-system reprogramming of ladder logic and I/O mapping via serial interface while preserving bootloader integrity via hardware lockout. | Use Scenario: Retaining calibrated sensor offsets and gain coefficients across power cycles in portable diagnostic equipment such as blood glucose meters and pulse oximeters. IC Role / Device Role / Timing Role: Parameter memory IC interfacing directly to microcontroller's parallel bus; accessed only during startup or calibration mode, not real-time. Use Value: Guarantees 10,000+ write cycles and 20-year data retention at 85°C - exceeds IEC 62304 requirements for Class B medical devices. |
| Automotive Body Control Module Bootloader | Consumer Appliance UI Configuration Storage |
Use Scenario: Hosting secure bootloader code in automotive BCMs that must authenticate and load application firmware over CAN before enabling vehicle subsystems. IC Role / Device Role / Timing Role: Trusted boot memory IC with write-protected 16 KB boot sector; accessed during cold start prior to CAN initialization. Use Value: Prevents corruption of bootloader by disabling writes to boot sector after initial programming - critical for ISO 26262 ASIL-B compliance. | Use Scenario: Storing user preferences (language, display brightness, timer settings) in smart home appliances like washing machines and ovens with no battery backup. IC Role / Device Role / Timing Role: Low-power nonvolatile data storage IC; powered only during UI menu navigation or power-on self-test. Use Value: 50 µA standby current extends appliance standby life; sector erase allows updating UI strings without disturbing motor control firmware stored elsewhere. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF020-70-4C-NHE | 4 Mbit density (512K × 8), 70 ns access, 3.0–3.6 V supply; lacks boot block lockout but offers faster read timing. | Requires larger PCB footprint; suitable where higher capacity and speed outweigh boot security needs. | Select when upgrading legacy designs needing >2 Mbit or sub-100 ns read latency; verify sector map compatibility with existing firmware. |
| MX29LV040CTTI-12 | 4 Mbit (512K × 8), 120 ns access, 3.0–3.6 V; includes CFI-compliant command set and 64 KB uniform sectors. | CFI support simplifies driver portability; uniform sectors ease wear leveling but lack dedicated boot protection. | Prefer for new designs requiring standardized flash drivers or future scalability to larger densities; requires firmware adaptation for sector management. |
Compared with SST39VF020-70-4C-NHE and MX29LV040CTTI-12, the AT49BV002N-12VC provides unique boot block lockout and optimized 2 Mbit density for cost-sensitive, security-critical embedded boot storage - making it preferable where firmware integrity and minimal footprint are prioritized over raw speed or capacity.
Availability
AT49BV002N-12VC is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive body electronics requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for AT49BV002N-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 support for legacy Atmel Flash products including the AT49BV series.
The AT49BV002N-12VC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for low-voltage, in-system reprogrammable code and data storage in space-constrained embedded systems operating from single 3 V supplies.
FAQ
What is the function of the RESET pin on the AT49BV002N-12VC?
The RESET pin on the AT49BV002N-12VC is a DC-connected (don't connect) terminal with no functional reset capability. Unlike the "T" variant, it cannot be used for hardware reset or boot block override. It must be left unconnected per datasheet guidance to avoid unintended behavior or ESD susceptibility.
Does the AT49BV002N-12VC support in-system programming without external high voltage?
Yes, the AT49BV002N-12VC supports full in-system programming using only its 2.7–3.6 V VCC supply - no external VPP or high-voltage programmer is required. All erase and program operations are initiated via standard 5 V-compatible command sequences written to specific address/data locations.
How is boot block protection implemented in the AT49BV002N-12VC?
The AT49BV002N-12VC implements boot block protection via a 6-byte command sequence (5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → 5555H/40H). Once enabled, the 16 KB boot sector (00000H–03FFFH) becomes permanently write-protected under normal 5.5 V conditions.
What package type does the AT49BV002N-12VC use, and what are its mechanical dimensions?
The AT49BV002N-12VC uses a 32-lead Very Small Outline Package (VSOP) measuring 8 mm × 14 mm with 0.5 mm lead pitch. It complies with JEDEC MO-178AC and is pin-compatible with TSOP-32 but features a thinner, smaller body ideal for compact industrial PCBs.
Can the AT49BV002N-12VC be used as a direct replacement for standard EPROMs like the 27C256?
Yes, the AT49BV002N-12VC is EPROM-compatible in interface and timing: it uses identical CE/OE/WE control signals, supports the same address/data bus protocol, and operates with standard microcontroller bus cycles - enabling drop-in replacement of 27C256 (32K × 8) in many designs, though firmware must be adapted for Flash-specific command sequences.
AT49BV002N-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
AT49BV002N-12VC FAQ
1.How can I place an order for AT49BV002N-12VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002N-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 AT49BV002N-12VC reliable?
The price and inventory of AT49BV002N-12VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002N-12VC is usually 5 days.
3.What payment methods are accepted for AT49BV002N-12VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002N-12VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002N-12VC?
AT49BV002N-12VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002N-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 AT49BV002N-12VC?
For technical support, including AT49BV002N-12VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002N-12VC requirements.
6.How does Aetrix verify that AT49BV002N-12VC is sourced from the original manufacturer or authorized distributors?
All AT49BV002N-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 AT49BV002N-12VC meets industry standards.
7.What is the process for return or replacement of AT49BV002N-12VC?
All AT49BV002N-12VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002N-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 AT49BV002N-12VC part is unused and in its original packaging.
Return procedure for AT49BV002N-12VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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