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Microchip Technology AT49BV002-12VC
- Part No.:
- AT49BV002-12VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV002-12VC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,586
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Product details
Overview
AT49BV002-12VC 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 microcontroller systems. It features 70 ns read access time, 10-second chip erase, byte-programmable architecture with sector protection, and operates across 0°C to 70°C commercial temperature range in VSOP-32 package.
For engineers reviewing the AT49BV002-12VC datasheet, AT49BV002-12VC pinout, AT49BV002-12VC application, or AT49BV002-12VC equivalent, key selection criteria include boot block lockout capability, DC/AC timing compliance at 120 ns tACC, low-power CMOS standby current (50 µA), and compatibility with standard 5V-command-based programming protocols without external high-voltage circuitry.
Technical Context
The AT49BV002-12VC implements a command-register-based architecture requiring six-byte software sequences for chip/sector erase and boot lockout enable. Its memory is partitioned into one 16K-byte boot block (00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (96K + 128K bytes), supporting selective erasure and reprogramming.
It uses standard EPROM-compatible control signals (CE/OE/WE) with dual-line bus contention prevention, supports DATA polling and Toggle Bit (I/O6) for operation completion detection, and includes hardware data protection via VCC sense, noise filtering (<15 ns pulse rejection), and input state inhibition (OE low, CE high, or WE high blocks programming).
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 MCUs. |
| Read Access Time | 120 ns max - meets timing requirements for 8 MHz bus interfaces with adequate setup/hold margins. |
| Supply Voltage | 2.7 V to 3.6 V - enables direct connection to 3.3 V system rails without level-shifting or regulators. |
| Active Current | 25 mA typical - compatible with low-power embedded systems during read operations. |
| Standby Current | 50 µA CMOS - reduces quiescent power in sleep-mode applications like battery-backed controllers. |
| Erase Time | 10 seconds max for full chip erase - enables field firmware updates within predictable time windows. |
| Program End Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Endurance | 10,000 write/erase cycles - sufficient for infrequent configuration or calibration data updates. |
Pinout & Package
AT49BV002-12VC is packaged in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm body size, with gull-wing leads and standard JEDEC MO-178 footprint. Pin 1 is located at bottom-left corner when notch is oriented upward.
| 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 for read/write transfers; high-impedance during standby or reset to prevent bus contention. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; enables multi-device decoding. |
| OE | Output Enable | Active-low output control; used with CE to gate data onto bus and avoid contention during shared-bus operation. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing; inhibits programming if held high. |
| RESET | Reset Input | Active-low reset; forces outputs to high-Z and halts ongoing program/erase; 12 V override enables boot block reprogramming. |
| VCC | Power Supply | Single 2.7–3.6 V supply; internal regulation ensures stable core voltage across operating range. |
| GND | Ground Reference | Common return path for all I/O and core logic; requires low-inductance layout near VCC decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte protected region (00000H–03FFFH) prevents accidental overwrite of bootloader code; enabled via 6-byte command sequence. |
| Sector-Erasable Architecture | Independent erasure 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 (<1.8 V disables programming), noise filtering (<15 ns pulses ignored), and input-state inhibition ensure robustness against ESD or glitch-induced writes. |
| Standard Command Protocol | 5V-level command sequences (e.g., 5555H/AAH, 2AAAH/55H) eliminate need for external high-voltage generators - simplifies in-system programming design. |
| Product Identification Mode | Hardware/software entry (A9 = 12 V or software command) returns manufacturer code 1FH and device code 07H - enables automatic algorithm selection in universal programmers. |
Applications
| Industrial PLC Firmware Storage | Automotive Instrument Cluster Bootloader |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with guaranteed boot block integrity; 120 ns read access supports real-time scan cycle execution. Use Value: Boot block lockout prevents corruption of safety-critical startup routines during field firmware upgrades, ensuring deterministic system boot behavior. | Use Scenario: Holding secure bootloader code and calibration tables in automotive digital instrument clusters operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Trusted boot memory with hardware-protected 16K sector; operates reliably under automotive voltage transients and thermal cycling. Use Value: RESET-pin 12 V override allows authorized reprogramming of locked boot code during service mode, enabling secure OTA update recovery paths. |
| Medical Device Configuration Memory | Networking Equipment Parameter Storage |
Use Scenario: Retaining user-configurable settings (e.g., alarm thresholds, display preferences) in portable diagnostic equipment with battery backup. IC Role / Device Role / Timing Role: Low-power (50 µA standby) nonvolatile storage; byte-programmable for efficient parameter updates without full erase. Use Value: Sector architecture isolates parameter blocks from main firmware, allowing independent updates while preserving regulatory-certified code integrity. | Use Scenario: Storing MAC addresses, PHY initialization tables, and feature license keys in Ethernet switches and routers. IC Role / Device Role / Timing Role: Dual 8K parameter blocks provide redundant storage for critical identifiers; DATA polling enables precise timing control during factory provisioning. Use Value: Toggle Bit (I/O6) and DATA polling eliminate need for fixed timeout loops in provisioning firmware - improves manufacturing line throughput and reliability. |
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 | 3.3 V only, 70 ns access, 2 Mbit density, same PLCC/TSOP packages; lacks RESET-based boot override and has different command set. | No 12 V RESET override for boot block; relies on software-only lock/unlock - less suitable for secure recovery workflows. | Select when standardized command compatibility and lower cost are prioritized over field-serviceable boot reprogramming. |
| MX29LV020TC-70G | 3.0–3.6 V, 70 ns access, 2 Mbit; supports CFI query, wider industrial temp range (-40°C to +105°C); no dedicated boot block lockout feature. | CFI support simplifies auto-detection in generic programmers; absence of hardware-enforced boot protection increases risk of accidental overwrite. | Choose for extended temperature operation and CFI-based toolchain integration where boot block security is managed externally. |
Compared with SST39VF020-70-4C-NHE and MX29LV020TC-70G, the AT49BV002-12VC uniquely combines 120 ns timing margin for slower controllers, hardware-enforced boot block lockout with 12 V override, and Atmel's proven command-set stability - making it optimal for legacy industrial designs requiring field-recoverable secure boot.
Availability
AT49BV002-12VC is available at Aetrix Electronics and suitable for industrial PLCs, automotive instrument clusters, medical diagnostics, and networking equipment requiring stable component supply with long lifecycle support and traceable sourcing.
Supply support for AT49BV002-12VC 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 company specializes in microcontrollers, analog, and nonvolatile memory solutions for industrial, automotive, and consumer markets.
The AT49BV002-12VC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable in-system reprogrammability in resource-constrained embedded systems using standard 3.3 V logic levels and minimal external circuitry.
FAQ
What is the memory organization of the AT49BV002-12VC?
The AT49BV002-12VC contains 2 Mbit (262,144 × 8) of Flash memory organized as 256K words by 8 bits. Its physical layout includes one 16K-byte boot block (00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). This sector architecture enables selective erasure and reprogramming without affecting protected regions.
Does the AT49BV002-12VC require high-voltage programming signals?
No, the AT49BV002-12VC does not require high-voltage programming signals. It uses standard 5V-level command sequences (e.g., 5555H/AAH) applied to the address/data bus with normal 3.3 V logic levels. Programming is internally generated, eliminating the need for external high-voltage generators or charge pumps - simplifying system design and reducing BOM cost.
How is boot block protection enabled and overridden on the AT49BV002-12VC?
Boot block protection on the AT49BV002-12VC is enabled via a six-byte command sequence (5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → 5555H/40H). Once enabled, the 16K boot block (00000H–03FFFH) becomes permanently write-protected at ≤5.5 V. Override is possible only by applying 12.0 V ± 0.5 V to the RESET pin during erase/program operations - a feature absent in N-suffix variants.
What package type and dimensions does the AT49BV002-12VC use?
The AT49BV002-12VC uses a 32-lead Very Small Outline Package (VSOP) with 8 mm × 14 mm body size and gull-wing leads (package code 32V). It complies with JEDEC MO-178 standards and is pin-compatible with other 32-lead Flash devices in PLCC, PDIP, and TSOP packages - enabling flexible PCB layout and migration paths.
Can the AT49BV002-12VC be used in industrial temperature applications?
The AT49BV002-12VC is rated for commercial temperature range (0°C to +70°C) per its ordering code suffix "C". For industrial operation (-40°C to +85°C), the correct variant is AT49BV002-12VI (suffix "I"). Using AT49BV002-12VC outside its specified range may result in timing violations, increased standby current, or data retention failure - always verify ambient conditions against the device's official operating range.
AT49BV002-12VC 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
AT49BV002-12VC FAQ
1.How can I place an order for AT49BV002-12VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002-12VC 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 AT49BV002-12VC reliable?
The price and inventory of AT49BV002-12VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002-12VC is usually 5 days.
3.What payment methods are accepted for AT49BV002-12VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002-12VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002-12VC?
AT49BV002-12VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002-12VC 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 AT49BV002-12VC?
For technical support, including AT49BV002-12VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002-12VC requirements.
6.How does Aetrix verify that AT49BV002-12VC is sourced from the original manufacturer or authorized distributors?
All AT49BV002-12VC 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 AT49BV002-12VC meets industry standards.
7.What is the process for return or replacement of AT49BV002-12VC?
All AT49BV002-12VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002-12VC, 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 AT49BV002-12VC part is unused and in its original packaging.
Return procedure for AT49BV002-12VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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