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Microchip Technology AT49BV001NT-90VI
- Part No.:
- AT49BV001NT-90VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV001NT-90VI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,247
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Product details
Overview
AT49BV001NT-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, 10-second chip erase, byte-programmable architecture with 30 µs/byte typical programming time, and hardware data protection - deployed in industrial firmware update modules requiring reliable boot code retention.
For engineers reviewing the AT49BV001NT-90VI datasheet, AT49BV001NT-90VI pinout, AT49BV001NT-90VI application, or AT49BV001NT-90VI equivalent, key selection criteria include its 16-Kbyte boot block with lockout capability, sector-erasable architecture (two 8-Kbyte parameter blocks + two main memory blocks), industrial temperature range (−40°C to +85°C), TSOP/VSOP/PLCC/DIP package compatibility, and RESET-pin-based boot override at 12 V.
Technical Context
The AT49BV001NT-90VI implements a command-register-based Flash architecture with software-controlled sector and chip erase via six-cycle sequences (e.g., 5555h/AAh → 2AAAh/55h → 5555h/80h). Its memory map partitions 128K words into a relocatable 16-Kbyte boot block (address 1C000h–1FFFFh), two 8-Kbyte parameter blocks, and two main memory blocks (32K and 64K bytes).
It supports standard EPROM-like read timing with CE/OE/WE dual-line control, DATA polling (I/O7 complement) and Toggle Bit (I/O6) for program/erase completion detection, and hardware safeguards including VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and write-inhibit logic (OE low, CE high, or WE high blocks writes).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits) - supports full firmware images for 8-bit MCUs with space for bootloader + application. |
| Read Access Time | 90 ns max - ensures deterministic instruction fetch timing in real-time control loops. |
| Byte Programming Time | 30 µs typical - enables fast field updates of configuration parameters without system downtime. |
| Erase Cycle Time | 10 seconds max (chip erase) - balances speed and endurance for infrequent firmware upgrades. |
| Endurance | 10,000 program/erase cycles - validated for long-life industrial deployments with periodic field updates. |
| Operating Voltage | 2.7–3.6 V - compatible with battery-backed or low-voltage regulated power rails in portable equipment. |
| Temperature Range | −40°C to +85°C - qualified for industrial-grade operation in motor drives and PLCs. |
Pinout & Package
AT49BV001NT-90VI is available in 32-lead VSOP (8 × 14 mm), TSOP (8 × 20 mm), PLCC, and PDIP packages. Pin functions are identical across packages per datasheet Figure 2 (VSOP/TSOP top view) and Figure 1 (PLCC/DIP top view); pin 9 (TSOP) and pin 1 (PLCC/DIP) are NC/DC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 required for accessing upper memory blocks. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with 8051, Z80, and 68K-family microcontrollers without glue logic. |
| CE | Chip Enable | Active-low chip select; enables device on shared bus only when asserted - prevents bus contention during multi-device operation. |
| OE | Output Enable | Active-low output gate; allows data readout while CE remains active - essential for interleaved read/write arbitration. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling edge - synchronizes command sequences with microprocessor write cycles. |
| RESET* | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs - also accepts 12 V for boot block override (not available on N-suffix variants). |
| VCC / GND | Power Supply | Single 2.7–3.6 V supply; CMOS standby current <50 µA enables ultra-low-power sleep modes in battery-operated devices. |
| NC / DC | No Connect / Don't Connect | Pin 9 (TSOP), Pin 1 (PLCC/DIP) - must be left floating or tied to ground per layout guidelines; no internal connection. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16-Kbyte protected region (1C000h–1FFFFh) prevents accidental overwrite of bootloader code - activated via 6-cycle command sequence; lockout status readable at 1C002h. |
| Sector-Erasable Architecture | Independent erasure of two 8-Kbyte parameter blocks and two main memory blocks (32K/64K) - enables modular firmware updates without full chip erase. |
| Hardware Data Protection | VCC sense, noise filtering, and OE/CE/WE inhibit logic eliminate spurious writes during power transients or EMI events - critical for automotive and industrial environments. |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggle provide real-time, bus-compatible program/erase status - eliminates need for external timers or interrupt handlers in host firmware. |
| 12 V RESET Override | Applying 12 V ±0.5 V to RESET pin unlocks boot block for reprogramming even after lockout - enables emergency recovery without device replacement. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware 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 with in-system reprogrammability; provides deterministic 90 ns read access for real-time scan cycle execution. Use Value: Boot block lockout ensures bootloader integrity across 10,000+ field updates; 10-second chip erase minimizes machine downtime during firmware patches. | Use Scenario: Hosting secure bootloader and calibration data in Class II medical instruments requiring FDA-compliant firmware traceability and tamper resistance. IC Role / Device Role / Timing Role: Trusted boot memory with hardware-enforced write protection; operates reliably over −40°C to +85°C for sterilization and clinical use. Use Value: 12 V RESET override enables authorized service personnel to recover corrupted boot code without opening sealed enclosures. |
| Automotive Body Control Module | Point-of-Sale Terminal Configuration |
Use Scenario: Storing vehicle-specific configuration tables (e.g., door lock logic, lighting profiles) in BCMs subject to automotive qualification standards. IC Role / Device Role / Timing Role: Parameter block storage with independent 8-Kbyte sector erase - isolates configuration changes from main application code. Use Value: Sector-level erasure avoids full reflash of safety-critical application code during dealership configuration updates. | Use Scenario: Holding localized language packs, tax rate tables, and peripheral driver settings in retail terminals deployed globally with regional compliance requirements. IC Role / Device Role / Timing Role: Field-updatable data storage with byte-level programming - enables zero-downtime localization updates via USB or network. Use Value: 30 µs/byte programming time allows rapid installation of multi-region configuration sets without interrupting transaction processing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-90-4C-NHE | 40 ns faster read (50 ns), same 1 Mbit density and 3 V supply; lacks 12 V RESET override and boot block lockout detection register. | Preferred where raw read speed dominates over boot security; not suitable for designs requiring certified bootloader protection. | Select if system prioritizes instruction fetch latency over firmware integrity mechanisms. |
| MX29LV010CTTI-90G | Same 90 ns access, 1 Mbit, 2.7–3.6 V; includes CFI query support and deeper power-down mode (1 µA), but no dedicated boot block lockout command set. | Better suited for consumer electronics with aggressive power budgets; requires external logic for boot protection. | Choose when CFI compatibility or sub-µA standby is mandatory, and boot security is handled externally. |
Compared with SST39VF010-90-4C-NHE and MX29LV010CTTI-90G, the AT49BV001NT-90VI uniquely integrates boot block lockout with hardware-reset override and sector-addressable erase - making it optimal for industrial and medical systems where firmware integrity and field recovery are design-critical.
Availability
AT49BV001NT-90VI 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 across extended product lifecycles.
Supply support for AT49BV001NT-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 IoT applications.
The AT49BV/LV001(N)(T) family was designed specifically for cost-sensitive, in-system reprogrammable code storage in 8-bit embedded systems - emphasizing boot security, low-voltage operation, and sector-level flexibility without external high-voltage circuitry.
FAQ
What is the boot block address range for AT49BV001NT-90VI?
The boot block for AT49BV001NT-90VI occupies addresses 1C000h to 1FFFFh (16 Kbytes). This differs from non-T variants (e.g., AT49BV001N), which locate the boot block at 00000h–03FFFh. The T-suffix denotes top-boot architecture, placing the protected region at the highest memory address - enabling seamless integration with Harvard-architecture MCUs that execute boot code from upper memory.
Does AT49BV001NT-90VI support 12 V programming or reset override?
Yes, AT49BV001NT-90VI supports 12 V ±0.5 V applied to the RESET pin to override boot block programming lockout during chip erase, sector erase, or byte programming. This feature is explicitly documented for the (T) variant and is unavailable on N-suffix parts like AT49BV001N. The 12 V signal must be maintained throughout the entire operation and removed only after completion.
How does hardware data protection work in AT49BV001NT-90VI?
AT49BV001NT-90VI implements three hardware protections: (1) VCC sense disables programming if supply drops below ~1.8 V; (2) write inhibition occurs if OE is low, CE is high, or WE is high; and (3) input noise filtering rejects pulses <15 ns on CE/WE. These features prevent unintended writes during brownouts, bus glitches, or ESD events - ensuring data integrity in electrically noisy industrial environments.
Can AT49BV001NT-90VI be used in place of AT49BV001N-90VI?
No - AT49BV001NT-90VI and AT49BV001N-90VI are not pin-compatible or functionally interchangeable. The "T" suffix indicates top-boot architecture (boot block at 1C000h–1FFFFh) and includes RESET-pin 12 V override, while the "N" suffix denotes bottom-boot (00000h–03FFFh) without override capability. Swapping them risks incorrect boot vector execution and failed firmware updates.
What package options are available for AT49BV001NT-90VI?
AT49BV001NT-90VI is offered in four industry-standard packages: 32-lead VSOP (8 × 14 mm), TSOP (8 × 20 mm), PLCC, and PDIP. All share identical pinout and timing; the VI suffix denotes Industrial temperature grade (−40°C to +85°C). Package selection depends on board density (VSOP/TSOP for compact designs) and assembly method (PLCC/PDIP for through-hole prototyping).
AT49BV001NT-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
AT49BV001NT-90VI FAQ
1.How can I place an order for AT49BV001NT-90VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001NT-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 AT49BV001NT-90VI reliable?
The price and inventory of AT49BV001NT-90VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001NT-90VI is usually 5 days.
3.What payment methods are accepted for AT49BV001NT-90VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001NT-90VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001NT-90VI?
AT49BV001NT-90VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001NT-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 AT49BV001NT-90VI?
For technical support, including AT49BV001NT-90VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001NT-90VI requirements.
6.How does Aetrix verify that AT49BV001NT-90VI is sourced from the original manufacturer or authorized distributors?
All AT49BV001NT-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 AT49BV001NT-90VI meets industry standards.
7.What is the process for return or replacement of AT49BV001NT-90VI?
All AT49BV001NT-90VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001NT-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 AT49BV001NT-90VI part is unused and in its original packaging.
Return procedure for AT49BV001NT-90VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV001NT-90VI Tags
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