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Microchip Technology AT49BV002AN-70VU
- Part No.:
- AT49BV002AN-70VU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV002AN-70VU.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,845
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Product details
Overview
AT49BV002AN-70VU from Atmel is a 2.7–3.6 V single-supply, in-system reprogrammable Flash memory IC with 2 Mbit (256K × 8) capacity, 70 ns read access time, and sector-erase architecture including one 16 KB boot block with programming lockout-used for secure firmware storage in embedded microcontroller boot loaders.
For engineers reviewing the AT49BV002AN-70VU datasheet, AT49BV002AN-70VU pinout, AT49BV002AN-70VU application, or AT49BV002AN-70VU equivalent, key selection considerations include its 32-pin VSOP (8 × 14 mm) package, 4-second chip erase time, byte-programming at 30 µs/byte, hardware data protection, and boot-block lockout override limitation (RESET pin is NC).
Technical Context
The AT49BV002AN-70VU implements a standard parallel Flash interface with CE/OE/WE control logic, internal program timing, and DATA polling + toggle-bit status detection. It uses Atmel's nonvolatile CMOS process and supports software command sequences-including chip erase (6-byte sequence), sector erase, byte programming, and boot-block lockout enable-for in-system reprogramming without high-voltage programming pins.
Its memory map is partitioned into 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 no-connect (NC) on this variant, disabling both reset functionality and boot-block lockout override via 12 V on RESET-distinguishing it from the AT49BV002A(T) variants.
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 microcontrollers. |
| Read Access Time | 70 ns max-enables direct execution from Flash (XIP) in systems with ≤14 MHz bus clocks. |
| Supply Voltage | 2.7 V to 3.6 V-compatible with 3.3 V logic and battery-powered applications; no 5 V required. |
| Erase Time | 4 seconds typical for full chip erase-allows rapid field firmware updates without external high-voltage generators. |
| Programming Speed | 30 µs per byte-supports efficient incremental code patching during development or maintenance. |
| Endurance | 10,000 write/erase cycles-validated for industrial lifecycle requirements in programmable logic controllers and instrumentation. |
| Standby Current | 50 µA CMOS standby-enables ultra-low-power retention in always-on embedded systems. |
Pinout & Package
AT49BV002AN-70VU is packaged in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm body, JEDEC MO-142 BA-compliant, with gull-wing leads and pin 1 identifier notch. Pin 9 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. |
| I/O0–I/O7 | Data Input/Output | Bi-directional 8-bit data bus; supports true read/write operation and DATA polling on I/O7/I/O6. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access. |
| 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 during command sequences and byte programming. |
| VCC | Power Supply | 2.7–3.6 V supply; internal voltage regulation enables stable operation across voltage range. |
| GND | Ground | Reference return path for all signals and power; decoupling capacitor placement critical near VCC/GND pair. |
| RESET* | No Connect (NC) | Pin 9 is unconnected-no reset functionality or 12 V boot-block override available on AT49BV002AN-70VU. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | Independent erasure of boot block (16 KB), two parameter blocks (8 KB each), and four main blocks (32/64 KB)-enables selective firmware updates without full reflash. |
| Boot Block Programming Lockout | Hardware-enforced write protection for 00000H–03FFFH region after command sequence; prevents accidental corruption of bootloader code. |
| DATA Polling & Toggle Bit | Real-time status feedback via I/O7 complement or I/O6 toggling-eliminates need for fixed delay timers during programming/erase. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock (OE low/CE high/WE high blocks writes). |
| Single 3.3 V Operation | No 5 V or 12 V programming voltages required-simplifies power design and eliminates level-shifting for host MCU interfaces. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
|
Use Scenario: Storing immutable bootloader and field-upgradable application firmware in programmable logic controllers operating in harsh environments. IC Role / Device Role / Timing Role: Nonvolatile parallel Flash memory providing XIP-capable code storage with hardware write protection for boot sector. Use Value: Ensures bootloader integrity across 10,000+ field updates while enabling fast 4-second sector erases for application patches-reducing downtime during maintenance. |
Use Scenario: Holding certified boot firmware and configuration data in Class II medical instruments requiring traceable, tamper-resistant memory. IC Role / Device Role / Timing Role: Secure, low-power Flash memory with permanent boot-block lockout preventing unauthorized modification of safety-critical startup code. Use Value: Meets IEC 62304 software lifecycle requirements via hardware-enforced write protection and 50 µA standby current for battery-backed operation. |
| Automotive Body Control Module | Test Equipment Calibration Storage |
|
Use Scenario: Storing vehicle-specific calibration tables and diagnostic routines in body control units exposed to -40°C to +85°C temperature cycling. IC Role / Device Role / Timing Role: Industrial-grade parallel Flash memory interfacing directly with 8-bit MCUs via standard CE/OE/WE protocol. Use Value: 70 ns access time supports real-time diagnostics; 2.7–3.6 V operation ensures compatibility with automotive 3.3 V domains without LDO overhead. |
Use Scenario: Retaining factory calibration constants and self-test algorithms in benchtop test equipment requiring long-term data retention and infrequent reprogramming. IC Role / Device Role / Timing Role: High-reliability Flash memory with 10,000-cycle endurance and DATA polling for deterministic programming verification. Use Value: Eliminates need for external status monitoring circuitry; 30 µs/byte programming enables rapid recalibration uploads during production line setup. |
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 density (2 Mbit), 70 ns access, but uses SST's SuperFlash technology with faster 18 ms sector erase vs. 4 s; requires different command set. | Supports faster iterative firmware updates; lacks boot-block lockout-requires software-based protection schemes. | Preferred when rapid sector reprogramming is critical and host firmware can accommodate alternate command protocol. |
| MX29LV200CTTI-70G | 2 Mbit, 70 ns, 3.0–3.6 V supply; includes CFI query support and hardware reset pin-unlike NC RESET on AT49BV002AN-70VU. | Enables standardized flash detection in BIOS/bootloaders; supports full reset recovery during erase interruption. | Chosen when system-level reset coordination and CFI-compliant toolchain integration are required. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, the AT49BV002AN-70VU offers proven boot-block lockout for bootloader security but trades slower erase performance and no hardware reset-making it optimal for cost-sensitive, static-boot applications where update frequency is low and protection assurance is paramount.
Availability
AT49BV002AN-70VU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and automotive body control module applications requiring stable component supply and long-term obsolescence management.
Supply support for AT49BV002AN-70VU 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 secure authentication devices.
The AT49BV002AN-70VU belongs to Atmel's Battery-Voltage™ Flash memory product line, designed for low-voltage, in-system reprogrammable storage in space-constrained embedded systems with strict power and reliability requirements.
FAQ
What is the function of the RESET pin on the AT49BV002AN-70VU?
The RESET pin on the AT49BV002AN-70VU is a no-connect (NC) terminal per datasheet Rev. 3353D. It is not bonded internally and serves no electrical function-unlike the AT49BV002A(T) variants where RESET enables boot-block override. This means AT49BV002AN-70VU cannot perform 12 V unlock operations, and boot-block lockout is irreversible once enabled.
Does the AT49BV002AN-70VU support in-system programming without external high voltage?
Yes, the AT49BV002AN-70VU supports full in-system programming using only its 2.7–3.6 V VCC supply. All command sequences-including chip erase, sector erase, and byte programming-are executed via standard 3.3 V logic levels on CE, OE, and WE. No external 5 V, 12 V, or VPP programming voltage is required.
What memory sectors are present in the AT49BV002AN-70VU and how are they addressed?
The AT49BV002AN-70VU contains one 16 KB boot block (00000H–03FFFH), two 8 KB parameter blocks (04000H–05FFFH and 06000H–07FFFH), and four main memory blocks: 32 KB (08000H–0FFFFH), and three 64 KB blocks (10000H–1FFFFH, 20000H–2FFFFH, 30000H–3FFFFH). Sector erase commands target specific address ranges per datasheet Table 5.
How is end-of-program detection implemented in the AT49BV002AN-70VU?
The AT49BV002AN-70VU provides two hardware-supported methods: DATA polling (I/O7 returns complement of written data until completion, then true data) and Toggle Bit (I/O6 toggles between 0/1 during programming/erase and stabilizes upon completion). Both allow host firmware to poll status without fixed delays or external timers.
Is the AT49BV002AN-70VU pin-compatible with other variants like AT49BV002A-70VI or AT49BV002AT-70TI?
Yes-AT49BV002AN-70VU shares identical pinout and signal definitions with all AT49BV002A(N)(T) family members in VSOP (32V), TSOP (32T), PLCC (32J), and PDIP (32P6) packages. However, functional differences exist: RESET is NC on 'N' and 'T' variants (vs. active on base 'A'), and boot-block address differs between 'N' (00000H–03FFFH) and 'T' (3C000H–3FFFFH) versions.
AT49BV002AN-70VU 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
AT49BV002AN-70VU FAQ
1.How can I place an order for AT49BV002AN-70VU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002AN-70VU 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-70VU reliable?
The price and inventory of AT49BV002AN-70VU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002AN-70VU is usually 5 days.
3.What payment methods are accepted for AT49BV002AN-70VU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002AN-70VU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002AN-70VU?
AT49BV002AN-70VU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002AN-70VU 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-70VU?
For technical support, including AT49BV002AN-70VU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002AN-70VU requirements.
6.How does Aetrix verify that AT49BV002AN-70VU is sourced from the original manufacturer or authorized distributors?
All AT49BV002AN-70VU 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-70VU meets industry standards.
7.What is the process for return or replacement of AT49BV002AN-70VU?
All AT49BV002AN-70VU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002AN-70VU, 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-70VU part is unused and in its original packaging.
Return procedure for AT49BV002AN-70VU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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