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Microchip Technology AT49BV001-90VC
- Part No.:
- AT49BV001-90VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV001-90VC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,075
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Product details
Overview
AT49BV001-90VC from Atmel is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory with 70 ns read access time, 10-second chip erase cycle, byte programming at 30 µs/byte typical, and hardware data protection including VCC sense and noise filtering. It is used for firmware storage and boot code retention in embedded microcontroller systems.
For engineers reviewing the AT49BV001-90VC datasheet, AT49BV001-90VC pinout, AT49BV001-90VC application, or AT49BV001-90VC equivalent, key selection criteria include its 16-Kbyte boot block with programmable lockout, sector-based erase architecture (two 8-Kbyte parameter blocks + two main memory blocks), and VSOP-32 (8 × 14 mm) package compatibility with industrial temperature range support.
Technical Context
The AT49BV001-90VC implements a standard parallel Flash interface with CE/OE/WE control logic and supports command-based operations including chip erase, sector erase, byte programming, and software product identification. Its internal program control logic eliminates need for external high-voltage programming circuitry.
It features dual erase modes: full-chip erase (10 s max) and sector-selectable erase targeting specific 8-Kbyte parameter blocks or 32/64-Kbyte main memory blocks. The boot block (00000H–03FFFH) supports permanent lockout via six-byte command sequence and optional 12 V RESET override for reprogramming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for compact boot firmware and configuration data. |
| Read Access Time | 90 ns maximum - compatible with 11 MHz bus timing in microcontroller interfaces without wait states. |
| Supply Voltage | 2.7 V to 3.6 V - enables direct connection to 3.3 V system rails without level-shifting or regulator overhead. |
| Erase Cycle Time | 10 seconds typical for full chip - enables field firmware updates within defined maintenance windows. |
| Byte Programming Time | 30 µs typical - allows efficient patching of individual configuration bytes without block-level overhead. |
| End-of-Program 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 - supports long-term field update capability in industrial control applications. |
| Standby Current | 50 µA CMOS - minimizes quiescent power in battery-backed or low-power sleep modes. |
Pinout & Package
AT49BV001-90VC is packaged in a 32-lead Plastic Very Small Outline Package (VSOP), 8 mm × 14 mm body, with standard parallel address/data bus layout and industry-compatible pinout.
| 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 | Bi-directional Data Bus | 8-bit parallel data path for read, program, and identification operations; TTL-compatible levels. |
| 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 manage bus contention during multi-device sharing. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle timing. |
| 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; internal voltage regulation ensures stable core operation across rail variation. |
| GND | Ground Reference | Signal and power return; decoupling capacitor required near VCC pin for noise immunity. |
| NC | No Connect | Pin 32 in VSOP package - left unconnected; no internal bonding or function. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16-Kbyte protected region (00000H–03FFFH) prevents accidental overwrite of critical boot code after enable command. |
| Sector Architecture | Independent erasability of two 8-Kbyte parameter blocks and two main memory blocks (32K/64K) enables modular firmware updates. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filter (<15 ns pulse rejection), and control-line interlock prevent spurious writes. |
| DATA Polling & Toggle Bit | Real-time end-of-program detection via I/O7 complement or I/O6 toggle - removes dependency on fixed timeout delays. |
| Single 3-V Operation | No external 12 V or 5 V required for programming or erase - simplifies power design and reduces BOM count. |
Applications
| Industrial PLC Firmware Storage | Embedded Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and runtime configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile program memory holding bootloader, application code, and calibration tables; accessed during cold start and field updates. Use Value: 10,000 write cycles and -40°C to +85°C industrial rating ensure reliable operation over 10+ years of repeated firmware upgrades. | Use Scenario: Hosting secure boot code that initializes CPU, configures peripherals, and validates application integrity before execution. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector; boot block lockout prevents corruption during application-level flash writes. Use Value: Hardware-enforced 16-Kbyte boot block protection eliminates need for software checksum guards or dual-bank redundancy. |
| Medical Device Configuration Storage | Automotive Diagnostic Module Memory |
Use Scenario: Retaining device-specific calibration data, user preferences, and regulatory compliance logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter storage memory accessed via microcontroller SPI-to-parallel bridge or direct bus interface during power-up and service mode. Use Value: Low 50 µA standby current extends battery life in handheld units; sector erase allows selective update of calibration tables without disturbing firmware. | Use Scenario: Storing OBD-II diagnostic routines, fault code definitions, and vehicle-specific adaptation values in telematics control units. IC Role / Device Role / Timing Role: Field-upgradable firmware repository supporting dealership-level recalibration and regulatory version rollouts. Use Value: 90 ns read speed enables real-time response to CAN bus diagnostic requests; VSOP package fits space-constrained automotive PCB layouts. |
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 3.0–3.6 V supply; lacks boot block lockout and RESET-based override. | Higher performance read path but no hardware-protected boot sector; requires software-managed write protection. | Select when raw read speed is prioritized over boot code security and field-reprogrammability of protected regions. |
| MX29LV001CTTI-90G | Same 90 ns access, 2.7–3.6 V, and 1 Mbit density; includes CFI-compliant command set and extended temperature range (-40°C to +105°C). | CFI support simplifies auto-detection in generic flash programmers; wider temp range suits under-hood automotive use. | Select when interoperability with CFI-aware toolchains or extended thermal margin beyond industrial grade is required. |
Compared with SST39VF010-90-4C-NHE and MX29LV001CTTI-90G, the AT49BV001-90VC uniquely combines boot block lockout with 12 V RESET override, enabling secure yet recoverable firmware deployment in safety-critical embedded systems where both integrity and field serviceability are mandatory.
Availability
AT49BV001-90VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded bootloader memory, medical device configuration storage, and automotive diagnostic module memory requiring stable component supply across long production lifecycles.
Supply support for AT49BV001-90VC 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 ICs.
The AT49BV series was designed as cost-optimized, single-supply Flash memory for embedded systems requiring in-system reprogrammability, robust data retention, and hardware-based write protection - particularly in resource-constrained 8/16-bit controller platforms.
FAQ
What is the memory organization of the AT49BV001-90VC?
The AT49BV001-90VC contains 1 Mbit of Flash memory organized as 131,072 words × 8 bits (128K × 8). Its physical address space spans 00000H to 1FFFFH, with dedicated sectors: one 16-Kbyte boot block (00000H–03FFFH), two 8-Kbyte parameter blocks, and two main memory blocks (32K and 64K bytes). This structure enables granular erase and programming operations essential for firmware partitioning in the AT49BV001-90VC.
Does the AT49BV001-90VC support hardware write protection for the boot sector?
Yes, the AT49BV001-90VC implements a hardware boot block programming lockout feature. Once enabled via a six-byte command sequence, the 16-Kbyte boot block (00000H–03FFFH) becomes permanently protected against erase or program operations at ≤5.5 V. This ensures firmware integrity while allowing updates to other sectors. The AT49BV001-90VC also supports 12 V RESET pin override for emergency reprogramming if lockout is activated.
What package type is used for the AT49BV001-90VC?
The AT49BV001-90VC uses a 32-lead Plastic Very Small Outline Package (VSOP) measuring 8 mm × 14 mm. This surface-mount package features gull-wing leads, complies with JEDEC MO-187, and is pin-compatible with PLCC-32, PDIP-32, and TSOP-32 variants of the same family. The VSOP variant is optimized for high-density PCB layouts in space-constrained industrial and automotive applications using the AT49BV001-90VC.
How does the AT49BV001-90VC detect completion of a byte programming cycle?
The AT49BV001-90VC provides two hardware methods: DATA polling and Toggle Bit detection. During programming, reading the last written byte returns the complement on I/O7 until completion, then true data. Alternatively, I/O6 toggles between 0 and 1 during active programming and stabilizes upon completion. Both mechanisms eliminate fixed-timing loops in host firmware and are fully supported in the AT49BV001-90VC's command set without external components.
What is the maximum erase time for the AT49BV001-90VC?
The AT49BV001-90VC specifies a maximum chip erase time of 10 seconds. This applies to full-device erasure initiated by the six-byte software erase command. Sector erase times are not individually specified but are significantly shorter due to smaller memory footprint; the device internally manages timing without external clocks. All erase operations - chip, sector, or boot block (if unlocked) - are fully completed within this 10-second window in the AT49BV001-90VC under worst-case conditions.
AT49BV001-90VC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49BV001-90VC FAQ
1.How can I place an order for AT49BV001-90VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001-90VC 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 AT49BV001-90VC reliable?
The price and inventory of AT49BV001-90VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001-90VC is usually 5 days.
3.What payment methods are accepted for AT49BV001-90VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001-90VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001-90VC?
AT49BV001-90VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001-90VC 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 AT49BV001-90VC?
For technical support, including AT49BV001-90VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001-90VC requirements.
6.How does Aetrix verify that AT49BV001-90VC is sourced from the original manufacturer or authorized distributors?
All AT49BV001-90VC 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 AT49BV001-90VC meets industry standards.
7.What is the process for return or replacement of AT49BV001-90VC?
All AT49BV001-90VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001-90VC, 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 AT49BV001-90VC part is unused and in its original packaging.
Return procedure for AT49BV001-90VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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