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Microchip Technology AT49BV001-90VI
- Part No.:
- AT49BV001-90VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV001-90VI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,315
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Product details
Overview
AT49BV001-90VI from Atmel is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory IC used for nonvolatile code/data storage in embedded microcontroller systems. It delivers 70 ns read access time, supports byte-by-byte programming (30 µs/byte typical), features hardware data protection, and includes a 16-Kbyte boot block with programmable lockout - deployed in industrial-grade applications requiring firmware persistence and field-upgradable BIOS or bootloader code.
For engineers reviewing the AT49BV001-90VI datasheet, AT49BV001-90VI pinout, AT49BV001-90VI application, or AT49BV001-90VI equivalent, key selection considerations include its 32-pin PLCC/TSOP/VSOP package compatibility, sector-erase architecture (boot + parameter + main memory blocks), RESET-enabled boot-block override capability, and industrial temperature range (–40°C to +85°C) operation.
Technical Context
The AT49BV001-90VI implements a standard parallel Flash interface with CE/OE/WE control logic and supports EPROM-like read timing. Its internal command register executes software-controlled erase and program operations without external high-voltage circuitry.
It uses a sector-based memory map: one 16-Kbyte boot block (00000H–03FFFH), two 8-Kbyte parameter blocks, and two main memory blocks (32K and 64K bytes). Erase is performed via 6-cycle command sequences (chip or sector), and programming uses 4-cycle load commands with DATA polling or toggle-bit status detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits) - sufficient for small firmware images or configuration tables in resource-constrained controllers. |
| Supply Voltage | 2.7 V to 3.6 V - enables direct integration with 3.3 V logic systems without level-shifting. |
| Read Access Time | 90 ns - defines maximum sustained instruction fetch rate from external memory in microcontroller boot scenarios. |
| Byte Programming Time | 30 µs typical - determines minimum time per byte update during field firmware patching. |
| Erase Cycle Time | 10 seconds max (full chip) - sets worst-case latency for reprogramming entire memory contents. |
| Endurance | 10,000 write/erase cycles - specifies usable lifetime under repeated field-update conditions. |
| Operating Temperature | –40°C to +85°C - qualifies for industrial control, automotive body electronics, and outdoor embedded devices. |
Pinout & Package
AT49BV001-90VI is available in 32-lead VSOP (8 × 14 mm), TSOP (8 × 20 mm), PDIP, and PLCC packages. The VSOP variant is indicated by the "V" suffix in the ordering code and matches the pinout shown in the VSOP top-view diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0 least significant bit. |
| I/O0–I/O7 | Data Inputs/Outputs | 8-bit bidirectional data bus; latched on WE/CE edges during programming/reads. |
| 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; initiates command loading, byte programming, or erase sequencing. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot-block override. |
| VCC | Power Supply | 2.7–3.6 V supply; powers core logic and I/O buffers; internal voltage regulation supports stable programming. |
| GND | Ground | Reference return for all signals and power; requires low-impedance PCB connection to minimize noise coupling. |
| NC | No Connect | Pin 31 in VSOP/TSOP packages - must remain unconnected per datasheet; not internally bonded. |
| DC | Don't Connect | Pin 1 in DIP/PLCC packages - floating; no internal connection; must be left open. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | Enables secure bootloader storage: 16-Kbyte boot block (00000H–03FFFH) can be permanently locked against accidental overwrite after enabling command sequence. |
| Hardware Data Protection | Prevents unintended writes via VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulse rejection), and control-line interlock (OE low / CE high / WE high disables programming). |
| DATA Polling & Toggle Bit Status | Allows real-time program/erase completion detection without polling timers: I/O7 complement indicates active programming; I/O6 toggling indicates ongoing operation. |
| 12 V RESET Override | Permits reprogramming of locked boot block by applying 12 V ± 0.5 V to RESET pin during erase/program - critical for recovery after corruption or security breach. |
| Low Power Standby | 50 µA CMOS standby current minimizes system-level quiescent power draw in battery-backed or energy-sensitive applications. |
Applications
| Industrial PLC Firmware Storage | Embedded Network Router Bootloader |
|---|---|
|
Use Scenario: Storing firmware and configuration data in programmable logic controllers operating in harsh factory environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile code storage device providing reliable boot image retention across power cycles and brownouts; accessed via parallel bus during MCU cold start. Use Value: Industrial temperature rating (–40°C to +85°C), hardware write protection, and 10,000-cycle endurance ensure long-term reliability without field recalibration or replacement. |
Use Scenario: Hosting bootloader and minimal OS kernel in residential or enterprise network routers requiring secure, updatable firmware with fallback capability. IC Role / Device Role / Timing Role: Primary boot memory mapped to CPU address space; boot block holds immutable startup code while parameter blocks store user-configurable settings. Use Value: Sector-erase architecture allows independent updating of application firmware (main memory) without affecting bootloader integrity or configuration parameters. |
| Automotive Body Control Module | Medical Diagnostic Equipment Configuration |
|
Use Scenario: Storing calibration tables, feature enable bits, and diagnostic logs in automotive BCMs where ECU reprogramming occurs over CAN during service intervals. IC Role / Device Role / Timing Role: Field-upgradable nonvolatile memory interfaced to microcontroller's external bus; erased and reprogrammed in-circuit using standard 3.3 V signaling. Use Value: Single 2.7–3.6 V supply eliminates need for charge pumps or auxiliary rails; RESET-driven boot-block override enables emergency firmware recovery. |
Use Scenario: Retaining device-specific calibration coefficients, regulatory compliance flags, and user preference profiles in portable medical diagnostic tools subject to strict traceability requirements. IC Role / Device Role / Timing Role: Secure configuration storage with write-lockable boot region; parameter blocks hold auditable, versioned settings accessible only via authenticated host commands. Use Value: Hardware data protection and boot-block lockout prevent unauthorized modification of safety-critical parameters; 10,000-cycle rating supports multi-year device lifecycle with periodic updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49LV001-90VI | 3.0–3.6 V only supply range; lacks 2.7 V low-voltage operation; identical pinout, timing, and sector architecture. | Not suitable for battery-powered systems operating near 2.7 V; otherwise drop-in compatible in 3.3 V fixed-rail designs. | Select when system VCC is tightly regulated at 3.3 V and extended low-voltage margin is unnecessary. |
| SST39VF010-90-4C-NHE | Same density and 90 ns access; supports 3.0–3.6 V; includes automatic erase suspend/resume and enhanced command set. | Offers improved interrupt handling during erase - beneficial in real-time systems requiring deterministic response latency. | Choose when application demands concurrent background erase with foreground reads or tighter timing control during field updates. |
Compared with AT49LV001-90VI and SST39VF010-90-4C-NHE, the AT49BV001-90VI provides broader voltage tolerance (2.7–3.6 V) essential for battery-depleted operation, while retaining identical industrial temperature support and boot-block security - making it optimal for portable or wide-input-range embedded platforms.
Availability
AT49BV001-90VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded network router bootloaders, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49BV001-90VI 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 for industrial, automotive, and consumer applications.
The AT49BV/LV001 series was designed as cost-effective, single-supply Flash memory for in-system reprogramming of microcontroller-based systems - emphasizing robustness, sector-level flexibility, and hardware-based data integrity in mission-critical embedded firmware storage.
FAQ
What is the operating voltage range of the AT49BV001-90VI?
The AT49BV001-90VI operates from 2.7 V to 3.6 V. This wider low-voltage margin compared to the AT49LV001-90VI (3.0–3.6 V) enables reliable function in battery-powered or brownout-prone systems. The device incorporates VCC-sense circuitry that inhibits programming if supply drops below ~1.8 V, preventing corruption during power transitions. All DC and AC specifications in the datasheet are validated across this full range.
Does the AT49BV001-90VI support in-system programming without external high voltage?
Yes, the AT49BV001-90VI supports full in-system reprogramming using only its 2.7–3.6 V supply. No external 12 V or higher programming voltage is required for standard byte programming or sector erasure. The internal command register interprets software-defined sequences (e.g., six-cycle chip erase) to initiate operations. Only the RESET-driven boot-block override requires 12 V - an exception used solely for recovery, not routine programming.
How is the boot block protected on the AT49BV001-90VI?
The AT49BV001-90VI includes a dedicated 16-Kbyte boot block (00000H–03FFFH) with programmable lockout. Once enabled via a six-command sequence (5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → 5555H/40H), the boot block becomes immune to erase or program commands at ≤5.5 V. The lockout state is detectable via software product identification mode reading I/O0 at address 00002H. RESET pin driven to 12 V overrides the lock for recovery.
What package types are available for the AT49BV001-90VI?
The AT49BV001-90VI is offered in four industry-standard 32-pin packages: VSOP (8 × 14 mm, "V" suffix), TSOP (8 × 20 mm, "T" suffix), PDIP (0.600" wide, "P" suffix), and PLCC (J-leaded, "J" suffix). The "VI" in the part number specifically denotes the industrial-temperature VSOP variant. Pinouts are identical across packages; only mechanical dimensions and thermal characteristics differ - VSOP offers compact footprint ideal for space-constrained PCBs.
Can the AT49BV001-90VI be used as a direct replacement for the AT49LV001-90VI?
The AT49BV001-90VI is pin-compatible and functionally equivalent to the AT49LV001-90VI in 3.3 V systems, but adds 2.7 V operation capability. Electrical timing (90 ns access), command set, sector map, and industrial temperature rating are identical. However, substituting AT49BV001-90VI into a design originally specifying AT49LV001-90VI introduces no risk - it extends voltage margin without requiring layout or firmware changes. The reverse substitution is not recommended for low-voltage operation.
AT49BV001-90VI 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:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 90 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
AT49BV001-90VI FAQ
1.How can I place an order for AT49BV001-90VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001-90VI 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 AT49BV001-90VI reliable?
The price and inventory of AT49BV001-90VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001-90VI is usually 5 days.
3.What payment methods are accepted for AT49BV001-90VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001-90VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001-90VI?
AT49BV001-90VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001-90VI 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 AT49BV001-90VI?
For technical support, including AT49BV001-90VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001-90VI requirements.
6.How does Aetrix verify that AT49BV001-90VI is sourced from the original manufacturer or authorized distributors?
All AT49BV001-90VI 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 AT49BV001-90VI meets industry standards.
7.What is the process for return or replacement of AT49BV001-90VI?
All AT49BV001-90VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001-90VI, 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 AT49BV001-90VI part is unused and in its original packaging.
Return procedure for AT49BV001-90VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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