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Microchip Technology AT49BV002A-70VI
- Part No.:
- AT49BV002A-70VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV002A-70VI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,074
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Product details
Overview
AT49BV002A-70VI from Atmel is a 2 Mbit (256K × 8) single-supply Flash memory IC operating at 2.7–3.6 V, featuring 70 ns read access time, 4-second chip erase, 30 µs/byte programming, and hardware data protection. It serves as nonvolatile program/data storage in embedded microcontroller systems requiring in-system reprogrammability without high-voltage programming.
For engineers reviewing the AT49BV002A-70VI datasheet, AT49BV002A-70VI pinout, AT49BV002A-70VI application, or AT49BV002A-70VI equivalent, key selection criteria include boot-block lockout capability, sector-based erase architecture (1×16K boot + 2×8K parameter + 4×main blocks), CMOS standby current (50 µA), and compatibility with standard EPROM-like bus interface (CE/OE/WE control).
Technical Context
The AT49BV002A-70VI implements a command-register-based architecture for byte programming, sector erase, and chip erase-requiring no external high-voltage supply. Its internal program timer and DATA polling (I/O7 complement) or toggle-bit (I/O6) mechanisms enable precise cycle completion detection.
It features a dedicated 16K-byte boot block with programmable lockout (enabled via six-command sequence), where lockout enforcement differs by variant: AT49BV002A allows override with 12 V on RESET, while AT49BV002AN(T) lacks RESET functionality entirely. The device supports hardware write inhibition via VCC sense (<1.8 V), OE/CE/WE logic states, and noise filtering on WE/CE inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 2 Mbit (256K × 8 bits), organized for direct microcontroller address/data bus interfacing |
| Read Access Time | 70 ns - enables direct replacement of 70 ns EPROMs without timing redesign |
| Supply Voltage | 2.7–3.6 V - supports battery-powered and low-voltage industrial systems without level-shifting |
| Erase Time | 4 seconds (chip erase) - deterministic internal timing eliminates need for external clocks or polling overhead |
| Programming Speed | 30 µs/byte typical - enables rapid field updates of configuration or firmware segments |
| End-of-Operation Detection | DATA polling (I/O7) or toggle-bit (I/O6) - provides software-controlled, cycle-accurate status without fixed delays |
| Write Endurance | 10,000 program/erase cycles - validated for long-term firmware update deployments in industrial controllers |
Pinout & Package
AT49BV002A-70VI is packaged in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm footprint, compliant with JEDEC MO-142 BA, with 0.5 mm lead pitch and 1.0 mm nominal body height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A11 is don't-care in command cycles |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface compatible with 8-bit microcontrollers; supports byte-level read/write |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read output |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during shared-memory access |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle timing |
| RESET* | Reset Input | Active-low reset; when driven to 12 V ±0.5 V, overrides boot-block lockout for reprogramming |
| VCC | Power Supply | 2.7–3.6 V core supply; internal regulation ensures stable operation across voltage range |
| GND | Ground Reference | Signal and power ground reference for all I/O and internal logic |
Key Features
| Feature | Design Value |
|---|---|
| Single 2.7–3.6 V Operation | Eliminates need for dual-voltage rails or charge pumps-reduces BOM count and PCB complexity |
| Boot Block Programming Lockout | 16K-byte protected region prevents accidental overwrite of bootloader code during field firmware updates |
| Sector-Erase Architecture | Independent erasure of boot, parameter, and main memory blocks enables granular updates without full-chip erase |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibit prevent spurious writes during power transients or EMI events |
| DATA Polling & Toggle Bit | Dual-cycle-completion detection methods simplify firmware integration and improve system responsiveness |
Applications
| Industrial PLC Firmware Storage | Embedded Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot code, runtime firmware, and user-configurable logic tables. Use Value: Sector-erase capability allows updating application logic without disturbing bootloader integrity; 70 ns access meets real-time scan cycle timing budgets. |
Use Scenario: Hosting secure boot code in microcontroller-based medical devices requiring certified startup sequences. IC Role / Device Role / Timing Role: Dedicated boot memory with hardware-enforced write protection to ensure bootloader immutability after certification. Use Value: Boot block lockout prevents unauthorized or erroneous modification of certified startup routines, meeting IEC 62304 safety requirements. |
| Telecom Line Card Configuration | Automotive Body Control Module |
Use Scenario: Retaining calibration data, feature enablement flags, and protocol stack parameters in telecom line cards operating across extended temperature ranges. IC Role / Device Role / Timing Role: Parameter storage memory with two 8K-byte dedicated blocks for field-serviceable configuration sets. Use Value: Independent parameter block erase enables carrier-specific customization without affecting main firmware or boot code. |
Use Scenario: Storing vehicle-specific configuration (e.g., door lock behavior, lighting profiles) in automotive BCMs subject to frequent dealership updates. IC Role / Device Role / Timing Role: In-system reprogrammable flash memory interfaced directly to 8-bit MCU via standard bus protocol. Use Value: 2.7–3.6 V operation supports wide battery voltage range (9–16 V with regulator); 50 µA standby current minimizes parasitic drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV002AN-70VI | No RESET pin functionality; boot block lockout cannot be overridden with 12 V signal | Preferred where absolute boot code permanence is required and no field reprogramming of boot sector is needed | Select when boot block must remain permanently locked regardless of voltage conditions |
| SST39VF200A-70-4C-NHE | Same 2 Mbit density and 70 ns speed, but uses different command set and lacks boot block lockout override | Requires firmware adaptation for command sequences; no 12 V RESET override for boot sector | Choose for cost-sensitive designs where Atmel-specific lockout override is not required |
Compared with AT49BV002AN-70VI, the AT49BV002A-70VI offers field-recoverable boot block reprogramming via 12 V RESET, while SST39VF200A-70-4C-NHE provides pin-compatible migration path but requires full command set validation and lacks hardware lockout override.
Availability
AT49BV002A-70VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded bootloader memory, and automotive body control module applications requiring stable component supply, long lifecycle support, and guaranteed traceable sourcing.
Supply support for AT49BV002A-70VI 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
Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and security ICs for industrial, automotive, and consumer applications.
The AT49BV002A series belongs to Atmel's Battery-Voltage™ Flash memory product line, designed specifically for low-voltage, in-system reprogrammable storage in resource-constrained embedded systems.
FAQ
What is the operating voltage range for the AT49BV002A-70VI?
The AT49BV002A-70VI operates over a single supply voltage range of 2.7 V to 3.6 V. This allows direct integration into battery-powered or low-voltage industrial systems without external voltage translation. Operation below 2.7 V disables programming functions via internal VCC sense circuitry, and voltages above 3.6 V exceed absolute maximum ratings and risk permanent damage. The AT49BV002A-70VI maintains full read, erase, and program functionality across this entire range.
How does the boot block lockout feature work on the AT49BV002A-70VI?
The AT49BV002A-70VI includes a 16K-byte boot block (address 00000H–03FFFH) with programmable lockout. Once enabled via a six-command sequence, writes to this region are blocked at ≤5.5 V. Crucially, the AT49BV002A-70VI supports override by applying 12 V ±0.5 V to the RESET pin during programming-enabling recovery if boot code corruption occurs. This override capability is absent in AT49BV002AN variants.
What package type is used for the AT49BV002A-70VI?
The AT49BV002A-70VI uses a 32-lead Very Small Outline Package (VSOP) with dimensions 8 mm × 14 mm and 0.5 mm lead pitch. It complies with JEDEC MO-142 Variation BA and features gull-wing leads suitable for surface-mount reflow assembly. This package offers lower profile and smaller footprint than PLCC or PDIP alternatives while maintaining compatibility with standard 32-pin Flash memory layouts.
Can the AT49BV002A-70VI be used as a direct replacement for standard EPROMs?
Yes-the AT49BV002A-70VI uses identical CE/OE/WE control signaling and 8-bit parallel data interface as standard 27C256 EPROMs, enabling drop-in replacement in existing designs. Its 70 ns access time matches common EPROM speeds, and it supports the same address/data bus timing. However, unlike EPROMs, it requires no UV erasure and supports in-circuit reprogramming via standard microcontroller GPIOs without high-voltage programmers.
What are the supported erase modes for the AT49BV002A-70VI?
The AT49BV002A-70VI supports three erase modes: chip erase (entire 256K-word array, 4 s typical), sector erase (individual 16K/8K/32K/64K blocks), and boot block erase (only if lockout is disabled). Sector erase uses a six-bus-cycle command with sector address latched on the sixth WE falling edge. All erase operations are internally timed-no external clocks or polling delays are required beyond the specified tEC or sector-erase duration.
AT49BV002A-70VI 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:
- 70 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
AT49BV002A-70VI FAQ
1.How can I place an order for AT49BV002A-70VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002A-70VI 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 AT49BV002A-70VI reliable?
The price and inventory of AT49BV002A-70VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002A-70VI is usually 5 days.
3.What payment methods are accepted for AT49BV002A-70VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002A-70VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002A-70VI?
AT49BV002A-70VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002A-70VI 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 AT49BV002A-70VI?
For technical support, including AT49BV002A-70VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002A-70VI requirements.
6.How does Aetrix verify that AT49BV002A-70VI is sourced from the original manufacturer or authorized distributors?
All AT49BV002A-70VI 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 AT49BV002A-70VI meets industry standards.
7.What is the process for return or replacement of AT49BV002A-70VI?
All AT49BV002A-70VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002A-70VI, 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 AT49BV002A-70VI part is unused and in its original packaging.
Return procedure for AT49BV002A-70VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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