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Microchip Technology AT49BV002AN-70JU
- Part No.:
- AT49BV002AN-70JU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV002AN-70JU.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV002AN-70JU from Atmel is a 2.7 V–3.6 V single-supply, in-system reprogrammable Flash memory IC with 2 Mbit (256K × 8) capacity, 70 ns read access time, and sector-based architecture including one 16 KB boot block with programming lockout. It supports byte-by-byte programming (30 µs/byte typical), 4-second chip erase, and operates across –40°C to +85°C for industrial embedded firmware storage.
For engineers reviewing the AT49BV002AN-70JU datasheet, AT49BV002AN-70JU pinout, AT49BV002AN-70JU application, or AT49BV002AN-70JU equivalent, this device serves as a drop-in replacement for legacy EPROM-based boot code storage where low-voltage operation, hardware data protection, and sector-level erase control are required in microcontroller-based systems.
Technical Context
The AT49BV002AN-70JU implements a standard parallel Flash interface with CE/OE/WE control logic and TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.6 V). Its internal command register executes software-controlled operations-including chip erase, sector erase, byte programming, and boot block lockout-without requiring external high-voltage programming signals.
It features dual end-of-operation detection: DATA polling (I/O7 complement toggle) and Toggle Bit (I/O6 toggling), both usable during active program/erase cycles. The RESET pin is NC on this variant, disabling reset-triggered boot block override and simplifying system-level reset handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - sufficient for full bootloader + parameter storage in resource-constrained MCU systems. |
| Read Access Time | 70 ns max - enables direct execution from Flash (XIP) in 12.5 MHz bus systems without wait states. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V logic rails and battery-backed operation without level-shifting. |
| Active Current | 15 mA typical at 5 MHz - supports low-power firmware update modes while maintaining real-time responsiveness. |
| Standby Current | 50 µA CMOS - reduces quiescent power in always-on embedded controllers during sleep. |
| Erase Cycle Time | 4 seconds typical for full chip erase - enables field firmware updates within sub-5-second service windows. |
| Programming End Detection | DATA polling (I/O7) and Toggle Bit (I/O6) - eliminates need for fixed timing delays in host firmware drivers. |
Pinout & Package
AT49BV002AN-70JU is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC), JEDEC MS-016 variation AE compliant, with 1.27 mm pitch and pin 1 identifier marked by corner chamfer. Pin 1 is NC (no connect) per datasheet Rev. 3353D.
| 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 sequences. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; controls device selection on shared data buses. |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention during multi-device reads. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming cycles. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; carries command codes, product ID, and user data; supports true read/write without direction control pins. |
| VCC / GND | Power Supply | Single 2.7–3.6 V supply; GND referenced for all I/O and internal logic; no separate VPP required. |
| RESET* | No Connect | Pin 1 on PLCC package is NC for AT49BV002AN(T); boot block override via 12 V on RESET is disabled. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB protected region (00000H–03FFFH) prevents accidental overwrite of bootloader code once enabled via 6-byte command sequence. |
| Sector Erase Architecture | One 16 KB boot block + two 8 KB parameter blocks + four main blocks (32 KB + 3×64 KB) - enables selective firmware updates without full chip erase. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filter (rejects <15 ns pulses), and control-line interlock (OE low/CE high/WE high blocks writes). |
| DATA Polling & Toggle Bit | Real-time, bus-compatible status reporting via I/O7 complement or I/O6 toggle - removes dependency on fixed timeout loops in host firmware. |
| Single 2.7–3.6 V Operation | Eliminates need for 5 V or 12 V programming supplies; supports direct integration into 3.3 V microcontroller systems with no voltage translation. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Retention |
|---|---|
|
Use Scenario: Storing immutable bootloader and field-upgradable application firmware in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with hardware-protected boot sector ensuring safe recovery after failed updates. Use Value: Prevents bricking during over-the-air updates; 10,000 write cycles support >5 years of scheduled maintenance cycles. |
Use Scenario: Securing FDA-compliant boot code in portable diagnostic equipment requiring traceable, tamper-resistant firmware storage. IC Role / Device Role / Timing Role: Trusted boot memory with lockout-enforced integrity for regulatory audit trails and version-controlled deployments. Use Value: Boot block lockout ensures bootloader remains unmodified between certified firmware releases, satisfying IEC 62304 requirements. |
| Automotive Body Control Module | Networking Equipment Parameter Storage |
|
Use Scenario: Holding calibration data and low-level driver code in automotive BCMs exposed to wide temperature swings (–40°C to +85°C). IC Role / Device Role / Timing Role: Temperature-stable Flash memory interfacing directly with 8-bit/16-bit MCUs via parallel bus. Use Value: 70 ns access time enables zero-wait-state execution; 50 µA standby current extends battery life in always-on modules. |
Use Scenario: Storing configuration parameters, MAC addresses, and security keys in Ethernet switches and routers with frequent field reconfiguration. IC Role / Device Role / Timing Role: Sector-erasable nonvolatile storage allowing independent update of parameter blocks without disturbing main firmware image. Use Value: Two dedicated 8 KB parameter blocks enable atomic write/verify of network settings, reducing risk of configuration corruption. |
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 | Same 2 Mbit density, 70 ns access, 3.3 V supply; uses different command set and lacks boot block lockout. | Requires modified firmware driver for erase/program commands; no hardware-protected boot region. | Choose when migrating legacy SST39VF designs; verify command compatibility and implement software-based boot protection. |
| MX29LV200CTTI-70G | 2 Mbit, 3.3 V, 70 ns; includes CFI query support and top/bottom boot block options but no NC RESET pin. | Supports standardized CFI identification; boot block location configurable (top or bottom), unlike fixed 00000H–03FFFH in AT49BV002AN-70JU. | Prefer for new designs needing CFI compliance or flexible boot sector placement; requires updated initialization routines. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, the AT49BV002AN-70JU offers deterministic boot block lockout with no firmware overhead, NC RESET simplification, and proven interoperability with Atmel MCU toolchains - making it optimal for cost-sensitive, long-lifecycle industrial firmware storage.
Availability
AT49BV002AN-70JU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader retention, and automotive body control module applications requiring stable component supply and long-term obsolescence management.
Supply support for AT49BV002AN-70JU 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, Flash memory, and secure authentication ICs, with a legacy of robust industrial-grade nonvolatile memory solutions.
The AT49BV002AN-70JU belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable, low-voltage in-system reprogramming in embedded systems where power efficiency and firmware integrity are critical.
FAQ
What is the function of the NC pin on AT49BV002AN-70JU?
The NC (No Connect) pin on AT49BV002AN-70JU is pin 1 in the PLCC package, explicitly designated as non-functional per datasheet Rev. 3353D. Unlike the base AT49BV002A variant, the AT49BV002AN-70JU omits RESET functionality - meaning boot block override via 12 V on that pin is unavailable. This simplifies PCB layout and eliminates high-voltage routing concerns in 3.3 V-only systems.
Does AT49BV002AN-70JU support in-system programming without external high voltage?
Yes, AT49BV002AN-70JU supports full in-system programming using only its 2.7–3.6 V VCC supply - no external VPP or 12 V signals are required. All command sequences (including chip erase, sector erase, and byte programming) execute via standard WE/CE/OE timing with 5 V–compatible logic levels, enabling direct integration with 3.3 V microcontrollers.
How is boot block protection implemented in AT49BV002AN-70JU?
Boot block protection in AT49BV002AN-70JU is implemented via a 6-byte software command sequence that permanently disables programming and erasure of the 16 KB boot sector (00000H–03FFFH). Once enabled, the lockout cannot be reversed - even with power cycling - ensuring bootloader integrity across firmware updates and field deployments.
What are the valid operating temperature and supply ranges for AT49BV002AN-70JU?
AT49BV002AN-70JU is rated for industrial temperature operation from –40°C to +85°C and requires a single 2.7 V to 3.6 V supply. Its DC characteristics - including 15 mA active current and 50 µA CMOS standby current - are guaranteed across this full range, making it suitable for uncontrolled ambient environments like factory floors or vehicle cabins.
Can AT49BV002AN-70JU be used as a direct replacement for EPROMs like 27C020?
Yes, AT49BV002AN-70JU is pin-compatible and functionally compatible with 27C020 EPROMs in read mode (CE/OE/WE timing), but adds in-system reprogrammability without UV erasure. Its 70 ns access time matches 27C020-70, and the same 32-pin PLCC footprint allows drop-in replacement - provided host firmware is updated to handle Flash-specific commands and DATA polling.
AT49BV002AN-70JU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- 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-PLCC (13.97x11.43)
AT49BV002AN-70JU FAQ
1.How can I place an order for AT49BV002AN-70JU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002AN-70JU 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 AT49BV002AN-70JU reliable?
The price and inventory of AT49BV002AN-70JU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002AN-70JU is usually 5 days.
3.What payment methods are accepted for AT49BV002AN-70JU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002AN-70JU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002AN-70JU?
AT49BV002AN-70JU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002AN-70JU 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 AT49BV002AN-70JU?
For technical support, including AT49BV002AN-70JU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002AN-70JU requirements.
6.How does Aetrix verify that AT49BV002AN-70JU is sourced from the original manufacturer or authorized distributors?
All AT49BV002AN-70JU 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 AT49BV002AN-70JU meets industry standards.
7.What is the process for return or replacement of AT49BV002AN-70JU?
All AT49BV002AN-70JU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002AN-70JU, 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 AT49BV002AN-70JU part is unused and in its original packaging.
Return procedure for AT49BV002AN-70JU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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