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Microchip Technology AT49BV002AT-70VI
- Part No.:
- AT49BV002AT-70VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV002AT-70VI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,107
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Product details
Overview
AT49BV002AT-70VI 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 industrial temperature range (−40°C to +85°C). It features sector-erase architecture including one 16K-byte boot block (address 3C000H–3FFFFH), two 8K-byte parameter blocks, and four main memory blocks - used for firmware storage and secure boot code retention in embedded controllers.
For engineers reviewing the AT49BV002AT-70VI datasheet, AT49BV002AT-70VI pinout, AT49BV002AT-70VI application, or AT49BV002AT-70VI equivalent, this device supports byte-programming (30 µs/byte), DATA polling and toggle-bit erase/program status detection, hardware data protection, and RESET-pin-based boot-block override (12 V), making it suitable for legacy 8-bit microcontroller systems requiring field-upgradable nonvolatile storage.
Technical Context
The AT49BV002AT-70VI implements a standard parallel Flash interface with CE/OE/WE control logic, compatible with EPROM read timing but enhanced with internal command-state machine for erase and program operations. Its architecture separates boot, parameter, and main memory blocks, each with independent erase capability and distinct address mapping - the T-suffix variant relocates the 16K-byte boot block to high memory (3C000H–3FFFFH).
It uses Atmel's nonvolatile CMOS process to achieve 10,000 write/erase cycles, 15 mA active current, and 50 µA CMOS standby current. Programming lockout is enforced via six-cycle command sequence; override requires 12 V on RESET, a feature absent in AN/T variants but confirmed present in AT/ANT versions per datasheet Rev. 3353D.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - supports full firmware image storage for 8-bit MCUs with external bus interfaces. |
| Read Access Time | 70 ns max - enables direct execution from Flash (XIP) in systems with ≤14 MHz bus clocks without wait states. |
| Supply Voltage | 2.7 V to 3.6 V - operates from single Li-ion or regulated 3.3 V rails, eliminating need for 5 V programming voltage. |
| Erase Time | 4 seconds typical for full chip erase - allows rapid field firmware updates without extended downtime. |
| Byte Programming Time | 30 µs typical - supports fine-grained patching of configuration or calibration data without block-level overhead. |
| End-of-Operation Detection | DATA polling (I/O7 complement) and toggle-bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Write Endurance | 10,000 program/erase cycles - validated for long-term use in industrial logging, bootloader update, and parameter storage applications. |
| Operating Temperature | −40°C to +85°C - qualified for industrial control, automotive body electronics, and networking equipment environments. |
Pinout & Package
AT49BV002AT-70VI is supplied in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm footprint (JEDEC MO-142 BA), with gull-wing leads and pin 1 identifier notch. This package supports surface-mount assembly and offers thermal and mechanical reliability for high-density PCB layouts.
| 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 per datasheet note. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path for read, program, and identification modes; supports true bidirectional I/O without direction control pin. |
| CE | Chip Enable | Active-low chip select; when high, places outputs in high-impedance state - essential for bus sharing with other peripherals. |
| OE | Output Enable | Active-low output gate; used with CE to control read data assertion and prevent bus contention during multi-device access. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle timing - central to all programming and erase sequences. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs. At 12 V, overrides boot-block lockout - unique to AT/ANT variants. |
| VCC | Power Supply | +2.7 V to +3.6 V supply; internal regulation ensures stable core voltage across operating range. |
| GND | Ground Reference | Signal and power ground reference; decoupling capacitor placement near this pin is critical for noise immunity during fast transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte region (3C000H–3FFFFH) permanently protected after command sequence - secures bootloader integrity against accidental overwrite. |
| 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) - prevents spurious writes in noisy environments. |
| Sector-Erase Architecture | Independent erasure of two 8K-byte parameter blocks and four main memory blocks (32K/64K/64K/64K) - enables selective firmware updates without full-chip erase. |
| 12 V RESET Override | Applying 12 V ± 0.5 V to RESET pin during erase/program re-enables boot block modification - provides recovery path when lockout is prematurely enabled. |
| Software Product Identification | Manufacturer code 1FH and device code 08H returned at A0=VIL/VIH in ID mode - enables automatic algorithm selection in universal programmers. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Bootloader |
|---|---|
|
Use Scenario: Storing firmware images and configuration tables in programmable logic controllers with 8-bit microcontrollers and parallel address/data buses. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped into CPU address space; accessed via standard CE/OE/WE timing with 70 ns read latency. Use Value: Enables field firmware upgrades without replacing hardware; sector erase allows updating logic routines while preserving I/O mapping tables in parameter blocks. |
Use Scenario: Hosting secure boot code in medical devices where bootloader must remain immutable during application firmware updates. IC Role / Device Role / Timing Role: Boot memory with hardware-enforced write protection; CPU fetches first instructions from 3C000H–3FFFFH after reset. Use Value: Prevents corruption of startup code by malicious or erroneous writes; 12 V RESET override permits authorized recovery if lockout is misapplied. |
| Automotive Body Control Module | Networking Equipment Parameter Storage |
|
Use Scenario: Retaining calibration data, VIN, and feature-enable flags in automotive BCMs operating across −40°C to +85°C. IC Role / Device Role / Timing Role: Parameter memory with dual 8K-byte blocks; accessed during power-on initialization and runtime diagnostics. Use Value: Hardware lockout and DATA polling ensure reliable, deterministic writes even under battery voltage fluctuations and EMI stress. |
Use Scenario: Storing MAC addresses, PHY configurations, and security keys in Ethernet switches and routers with legacy parallel bus interfaces. IC Role / Device Role / Timing Role: Configuration memory with independent sector erase - allows key updates without disturbing firmware in main memory blocks. Use Value: Eliminates need for external EEPROM; 10,000-cycle endurance supports frequent provisioning and rekeying over product lifetime. |
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 | 2 Mbit, 70 ns, 3.0–3.6 V supply; no RESET-based boot override; different command set and sector map. | Lacks 12 V boot-block unlock; requires redesign of firmware update routines and lockout management logic. | Choose when strict pin compatibility and identical timing are required, and boot-block override is unnecessary. |
| MX29LV200CTTI-70G | 2 Mbit, 70 ns, 3.0–3.6 V; C-suffix indicates top-boot configuration (boot block at 3C000H–3FFFFH), matching AT49BV002AT address layout. | Supports similar sector-erase and lockout features but uses different command sequences and lacks 12 V RESET override. | Prefer for new designs needing second-source availability; verify command compatibility and timing margins before migration. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, the AT49BV002AT-70VI uniquely combines top-boot sector alignment, hardware boot-lockout, and 12 V RESET override - enabling both robust protection and field-recoverability in safety-critical embedded systems.
Availability
AT49BV002AT-70VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system bootloaders, automotive body control modules, and networking equipment parameter storage requiring stable component supply and long-lifecycle support.
Supply support for AT49BV002AT-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, Flash memory, and secure authentication ICs, with a legacy of robust industrial-grade nonvolatile memory solutions.
The AT49BV002A(N)(T) family was designed for in-system reprogrammable firmware and configuration storage in resource-constrained 8-bit embedded systems, emphasizing single-voltage operation, sector-level flexibility, and hardware data integrity safeguards.
FAQ
What is the boot block address range for AT49BV002AT-70VI?
The AT49BV002AT-70VI uses the "T" suffix variant, which locates the 16K-byte boot block at address range 3C000H to 3FFFFH - distinct from the base AT49BV002A (00000H–03FFFH). This top-boot configuration aligns with common memory-mapped bootloader expectations in 8051 and Z80-based systems, and is explicitly confirmed in the datasheet's sector address table and boot lockout detection section.
Does AT49BV002AT-70VI support 12 V programming or only 12 V RESET override?
The AT49BV002AT-70VI does not require 12 V for programming - all write/erase operations execute at 2.7–3.6 V. However, applying 12 V ± 0.5 V to the RESET pin during chip erase, sector erase, or byte programming overrides the boot block lockout feature, allowing reprogramming of the protected region. This function is documented in the "Boot Block Programming Lockout Override" section and is specific to AT/ANT variants.
How is end-of-program detection implemented in AT49BV002AT-70VI?
The AT49BV002AT-70VI supports two hardware-assisted end-of-program detection methods: DATA polling (reading the programmed byte returns its complement on I/O7 until completion) and toggle-bit detection (I/O6 toggles between 0 and 1 during operation and stabilizes upon completion). Both are usable at any time during the cycle and eliminate reliance on fixed software delays - a key design advantage confirmed in the "DATA POLLING" and "TOGGLE BIT" sections of the datasheet.
What package type is used for AT49BV002AT-70VI?
The AT49BV002AT-70VI is packaged in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm footprint (package code 32V), compliant with JEDEC MO-142 Variation BA. This surface-mount package features gull-wing leads, 0.5 mm pitch, and is optimized for automated assembly and thermal performance in space-constrained industrial PCBs - as detailed in the "Packaging Information" section and drawing 32V.
Can AT49BV002AT-70VI be used as a direct replacement for AT49BV002A-70VI?
No - AT49BV002AT-70VI is not a direct replacement for AT49BV002A-70VI due to fundamental differences in boot block location (3C000H–3FFFFH vs. 00000H–03FFFH) and associated address decoding. Firmware that assumes bottom-boot layout will fail to locate the bootloader. While pinout and timing are identical, application code and memory map configuration must be updated to accommodate the top-boot address space of the AT-suffix variant.
AT49BV002AT-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
AT49BV002AT-70VI FAQ
1.How can I place an order for AT49BV002AT-70VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002AT-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 AT49BV002AT-70VI reliable?
The price and inventory of AT49BV002AT-70VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002AT-70VI is usually 5 days.
3.What payment methods are accepted for AT49BV002AT-70VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002AT-70VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002AT-70VI?
AT49BV002AT-70VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002AT-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 AT49BV002AT-70VI?
For technical support, including AT49BV002AT-70VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002AT-70VI requirements.
6.How does Aetrix verify that AT49BV002AT-70VI is sourced from the original manufacturer or authorized distributors?
All AT49BV002AT-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 AT49BV002AT-70VI meets industry standards.
7.What is the process for return or replacement of AT49BV002AT-70VI?
All AT49BV002AT-70VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002AT-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 AT49BV002AT-70VI part is unused and in its original packaging.
Return procedure for AT49BV002AT-70VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV002AT-70VI Tags
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