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Microchip Technology AT49BV002AN-70PI
- Part No.:
- AT49BV002AN-70PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49BV002AN-70PI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,846
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Product details
Overview
AT49BV002AN-70PI 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-erasable architecture including one 16 KB boot block with programming lockout-used for secure firmware storage in embedded controllers and industrial boot loaders.
For engineers reviewing the AT49BV002AN-70PI datasheet, AT49BV002AN-70PI pinout, AT49BV002AN-70PI application, or AT49BV002AN-70PI equivalent, this page delivers verified electrical specs, PLCC-32 package mapping, boot-block protection behavior, byte-programming timing (30 µs), and real-world use context for legacy system upgrades and field-reprogrammable firmware storage.
Technical Context
The AT49BV002AN-70PI implements a standard parallel Flash interface with CE/OE/WE control logic, supports EPROM-like read operation, and uses command sequences (e.g., 6-byte chip erase, 4-byte byte program) latched on WE/CE edges. It features internal program timers and DATA polling (I/O7 complement) or toggle-bit (I/O6) status detection.
Its sector architecture comprises one 16 KB boot block (00000H–03FFFH), two 8 KB parameter blocks, and four main memory blocks (32 KB + 3×64 KB). The RESET pin is NC on this variant, disabling both reset functionality and boot-block lockout override via 12 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), enabling full BIOS or bootloader storage in space-constrained industrial controllers |
| Read Access Time | 70 ns max - meets timing requirements for 14 MHz bus interfaces without wait states |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V systems and battery-backed operation |
| Byte Programming Time | 30 µs typical - enables rapid field updates of small firmware patches |
| Erase Cycle Time | 4 seconds max for full chip - supports in-system reprogramming during maintenance windows |
| End-of-Program Detection | DATA polling (I/O7) or toggle-bit (I/O6) - eliminates need for fixed delay timers in host firmware |
| Write Endurance | 10,000 program/erase cycles - sufficient for infrequent firmware revisions over 10+ year product life |
Pinout & Package
AT49BV002AN-70PI is housed in a 32-lead Plastic Leaded Chip Carrier (PLCC-32) package per JEDEC MS-016, Variation AE, with 1.27 mm pitch, 12.45 mm × 14.95 mm body, and pin 1 identifier at corner. 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 cycles |
| 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 gate; controls data bus tristate to prevent contention during shared-bus operation |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read data output and program data input; supports DATA polling on I/O7 |
| VCC | Power Supply | +2.7 V to +3.6 V supply; powers core logic and I/O buffers; CMOS standby current ≤50 µA |
| GND | Ground Reference | Signal and power return; required for stable read/write margins and noise immunity |
| RESET | No Connect (NC) | Pin 1 on PLCC package is unconnected - no reset function or boot-lock override capability |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB region (00000H–03FFFH) permanently protected after enable command - prevents accidental overwrite of critical startup code |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filter (rejects <15 ns glitches), and control-line inhibit (OE low/CE high/WE high blocks writes) |
| Sector-Erasable Architecture | Independent erasure of boot block, two 8 KB parameter blocks, and four main memory blocks - enables selective firmware updates without full chip erase |
| Standard Parallel Interface | CE/OE/WE control signals and EPROM-compatible timing - simplifies migration from EPROM-based designs with minimal PCB changes |
| Low-Power Operation | 15 mA active current and 50 µA CMOS standby current - suitable for battery-backed or energy-sensitive industrial applications |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded Controller Bootloader |
|---|---|
Use Scenario: Storing boot firmware in programmable logic controllers where field updates must preserve startup integrity. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic reset-to-execution path with hardware-protected boot sector. Use Value: Prevents corruption of critical initialization code during remote firmware patching via sector-erase isolation and permanent boot-lockout. |
Use Scenario: Replacing UV-erasable EPROMs in aging microcontroller-based instrumentation systems. IC Role / Device Role / Timing Role: Drop-in parallel Flash replacement with identical 70 ns access and pin-compatible PLCC-32 footprint. Use Value: Eliminates UV eraser dependency and enables in-circuit reprogramming without board removal. |
| Medical Device Configuration Storage | Telecom Line Card Parameter Memory |
Use Scenario: Holding calibrated sensor offsets and safety-critical configuration parameters in Class II medical electronics. IC Role / Device Role / Timing Role: Secure parameter memory with dual protection: hardware lockout and software detectable boot-lock status. Use Value: Ensures regulatory compliance by preventing unauthorized runtime modification of calibration data via verified lockout state readback. |
Use Scenario: Storing line-specific DSP coefficients and protocol stack parameters in carrier-grade DSLAM line cards. IC Role / Device Role / Timing Role: Field-upgradable parameter bank supporting multiple service profiles without hardware change. Use Value: Enables carrier-defined service differentiation through independent 8 KB parameter block erasure and reprogramming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV002BT-70EC | 3.0 V–3.6 V supply only; lacks 2.7 V low-voltage support; 70 ns access; same 2 Mbit density and PLCC-32 package | No boot-block lockout; uses CFI-compliant command set instead of Atmel's proprietary sequence | Choose when CFI compatibility or higher minimum VCC is acceptable and boot protection is handled externally |
| SST39VF200A-70-4C-NHE | 2.7 V–3.6 V supply; 70 ns access; 2 Mbit density; PLCC-32; includes hardware write-protect pin (WP#) | Uniform 64 KB sectors (no dedicated boot block); WP# offers simpler external lockout vs. command-based boot lock | Prefer for new designs needing explicit hardware-level write protection and standardized sector layout |
Compared with AM29LV002BT-70EC and SST39VF200A-70-4C-NHE, the AT49BV002AN-70PI uniquely provides factory-configurable 16 KB boot-block lockout with software-detectable status, making it optimal for legacy systems requiring guaranteed boot-code immutability without external logic.
Availability
AT49BV002AN-70PI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded controller bootloader replacement, and medical device configuration storage requiring stable component supply across extended product lifecycles.
Supply support for AT49BV002AN-70PI 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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and security ICs, with a legacy of robust industrial-grade Flash products.
The AT49BV002A(N)(T) family was designed for in-system reprogrammable firmware storage in resource-constrained embedded systems, emphasizing low-voltage operation, sector-level flexibility, and hardware-assisted data integrity.
FAQ
What is the function of the RESET pin on AT49BV002AN-70PI?
The RESET pin on AT49BV002AN-70PI is a no-connect (NC) terminal per datasheet Rev. 3353D - it is not bonded internally and serves no functional purpose. Unlike the base AT49BV002A variant, this part does not support reset-driven operations or 12 V boot-block override. Host systems must manage reset sequencing externally when using AT49BV002AN-70PI.
Does AT49BV002AN-70PI support boot block programming lockout, and how is it enabled?
Yes, AT49BV002AN-70PI supports boot block programming lockout for its 16 KB boot sector (00000H–03FFFH). It is enabled via a six-cycle command sequence: load AAh at 555H, 55h at AAH, 80h at 555H, then AAh/55h/40h at 555H/AAH/555H. Once enabled, the boot block becomes permanently write-protected under ≤5.5 V - a key safeguard for AT49BV002AN-70PI in mission-critical boot applications.
What package type is used for AT49BV002AN-70PI, and what are its key mechanical dimensions?
AT49BV002AN-70PI uses a 32-lead Plastic Leaded Chip Carrier (PLCC-32) package per JEDEC MS-016, Variation AE. Its body measures 12.45 mm × 14.95 mm, with 1.27 mm lead pitch and 3.35 mm maximum height. Pin 1 is located at the top-left corner with a chamfered edge identifier, and pin 1 is NC - a defining mechanical and functional trait of the AT49BV002AN-70PI variant.
How does AT49BV002AN-70PI handle end-of-program detection during byte programming?
AT49BV002AN-70PI supports two hardware-supported end-of-program detection methods: DATA polling (I/O7 returns complement of programmed data until completion, then true data) and toggle-bit (I/O6 toggles between 0/1 during programming and stabilizes upon completion). Both methods eliminate fixed-timing delays in host firmware and are fully operational during AT49BV002AN-70PI byte programming cycles.
What is the maximum erase time for AT49BV002AN-70PI, and which blocks can be erased independently?
The maximum chip erase time for AT49BV002AN-70PI is 8 seconds (typical 4 s), while sector erase time is identical. Independently erasable blocks include the 16 KB boot block, two 8 KB parameter blocks, and four main memory blocks (32 KB + 3×64 KB). If boot lockout is enabled, chip erase excludes the boot block - a critical behavior confirmed for AT49BV002AN-70PI in datasheet section "CHIP ERASE".
AT49BV002AN-70PI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-DIP (0.600", 15.24mm)
- 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:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49BV002AN-70PI FAQ
1.How can I place an order for AT49BV002AN-70PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002AN-70PI 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-70PI reliable?
The price and inventory of AT49BV002AN-70PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002AN-70PI is usually 5 days.
3.What payment methods are accepted for AT49BV002AN-70PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002AN-70PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002AN-70PI?
AT49BV002AN-70PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002AN-70PI 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-70PI?
For technical support, including AT49BV002AN-70PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002AN-70PI requirements.
6.How does Aetrix verify that AT49BV002AN-70PI is sourced from the original manufacturer or authorized distributors?
All AT49BV002AN-70PI 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-70PI meets industry standards.
7.What is the process for return or replacement of AT49BV002AN-70PI?
All AT49BV002AN-70PI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002AN-70PI, 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-70PI part is unused and in its original packaging.
Return procedure for AT49BV002AN-70PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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