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Microchip Technology AT49BV001AT-55JI
- Part No.:
- AT49BV001AT-55JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV001AT-55JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,120
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Product details
Overview
AT49BV001AT-55JI from Atmel is a 1 Mbit (128K × 8) single-supply Flash memory IC designed for in-system reprogrammability in embedded boot code storage applications. It operates from 2.7V to 3.6V, delivers 55 ns read access time, supports byte-by-byte programming at 30 µs/byte, and features hardware data protection with 10,000 write/erase cycles.
For engineers reviewing the AT49BV001AT-55JI datasheet, AT49BV001AT-55JI pinout, AT49BV001AT-55JI application, or AT49BV001AT-55JI equivalent, this device serves as a battery-voltage-compatible, sector-erasable Flash solution for industrial microcontroller boot memory where reliable, low-power nonvolatile storage and field-upgradable firmware are required.
Technical Context
The AT49BV001AT-55JI implements a standard parallel Flash architecture with CE/OE/WE control logic, supporting EPROM-like read timing and command-based programming/erasure. Its memory map is partitioned into one 16K-byte boot block (address range 1C000H–1FFFFH), two 8K-byte parameter blocks, and two main memory blocks (32K + 64K bytes).
It uses internal program control and timers to execute erase and program operations without external clocks; chip erase completes in ≤5 seconds, sector erase is supported per defined address ranges, and DATA polling (I/O7 complement) or Toggle Bit (I/O6 toggling) provides cycle completion detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits); sufficient for compact boot loaders and configuration data in space-constrained designs. |
| Read Access Time | 55 ns max; enables direct interface with 16–20 MHz microcontrollers without wait states. |
| Supply Voltage | 2.7 V to 3.6 V; compatible with single Li-ion or 3.3 V system rails, eliminating level-shifting requirements. |
| Byte Programming Time | 30 µs typical; allows rapid field updates of small firmware patches without long downtime. |
| Erase Cycle Time | 3 seconds typical for full chip or sector erase; supports fast reconfiguration during maintenance or recovery. |
| End-of-Operation Detection | DATA polling (I/O7) and Toggle Bit (I/O6); eliminates need for fixed delay timers in host firmware. |
| Write Endurance | 10,000 program/erase cycles; validated for long-term deployment in industrial firmware update scenarios. |
| Standby Current | 50 µA CMOS; minimizes quiescent power draw in always-on or battery-backed systems. |
Pinout & Package
AT49BV001AT-55JI is packaged in a 32-lead PLCC (32J) with JEDEC MS-016, Variation AE compliance. Pin 1 identifier is marked by a corner chamfer; package dimensions: 12.45 mm × 12.45 mm × 3.35 mm (max height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 131,072-word addressing; A11 is don't-care in command sequences. |
| CE | Chip Enable | Active-low enable controlling device selection; must be low with OE low and WE high for valid read access. |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention during shared-memory bus operation. |
| WE | Write Enable | Active-low control for write/program/erase command latching; falling edge latches address, rising edge latches data. |
| I/O0–I/O7 | Data I/O Bus | Bidirectional 8-bit data path; supports byte-wide reads, writes, and status polling (I/O6, I/O7). |
| RESET* | Reset Input | Active-low reset; when driven to 12 V ±0.5 V, overrides boot block lockout-unique to AT49BV001AT variant. |
| VCC | Power Supply | 2.7–3.6 V supply input; powers core logic and I/O buffers; internal voltage sensing inhibits programming if <1.8 V. |
| GND | Ground | Reference for all signals and power; decoupling capacitor placement near this pin is critical for noise immunity. |
| NC | No Connect | Pin 1 in PLCC package is unconnected; must remain floating-no tie to VCC, GND, or signal lines. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | 16K-byte boot block (1C000H–1FFFFH) supports permanent firmware protection via command sequence; lockout override enabled only with 12 V on RESET pin. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibit (OE low/CE high/WE high blocks writes). |
| Fast In-System Reprogrammability | No high-voltage programming required; 5 V–compatible command set enables field updates using standard 3.3 V system logic. |
| Low-Power Operation | 15 mA active current and 50 µA CMOS standby current reduce thermal load and extend battery life in portable or remote systems. |
| Robust End-of-Cycle Signaling | Dual methods-DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling)-provide deterministic, software-driven timing control. |
Applications
| Industrial PLC Firmware Storage | Embedded Network Router Boot Memory |
|---|---|
|
Use Scenario: Storing bootloader and fail-safe recovery firmware in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing immediate code execution after cold start; accessed via parallel bus with 55 ns timing alignment to MCU clock domain. Use Value: Sector-erasable architecture isolates boot code (16K boot block) from application updates, ensuring system integrity even during partial firmware corruption. |
Use Scenario: Holding secure boot code and configuration parameters in enterprise-grade network routers requiring remote firmware upgrades. IC Role / Device Role / Timing Role: Parallel Flash memory mapped into CPU address space; supports in-system reprogramming without hardware intervention or power cycle. Use Value: 10,000 write cycles and hardware lockout ensure multi-year field reliability while enabling secure, over-the-air (OTA) patch deployment. |
| Medical Device Diagnostic Module | Automotive Body Control Unit (BCU) |
|
Use Scenario: Storing calibration data and diagnostic firmware in portable medical analyzers subject to strict power budget and regulatory traceability requirements. IC Role / Device Role / Timing Role: Low-power (50 µA standby) Flash memory retaining critical calibration tables across sleep/wake cycles. Use Value: Battery-voltage operation (2.7–3.6 V) eliminates need for auxiliary regulators, reducing BOM cost and board area in compact handheld units. |
Use Scenario: Hosting boot firmware and vehicle-specific configuration in automotive body control modules deployed across temperature ranges from −40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade Flash memory qualified for extended temperature operation; interfaces directly with 8-bit/16-bit automotive MCUs. Use Value: Hardware data protection (noise filtering, VCC sense) prevents accidental writes during electrical transients common in automotive 12 V systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-55-4C-NHE | Same density (1 Mbit), 55 ns access, but uses SST's SuperFlash technology with faster erase (10 ms sector, 30 ms chip) and no RESET-based boot lockout override. | Lacks 12 V RESET override; boot protection relies solely on software lock bits-less resilient to firmware bugs that disable lock commands. | Choose when faster erase performance is prioritized over boot block reprogrammability under field conditions. |
| MX29LV160CBTI-55G | 16 Mbit density, 55 ns access, CFI-compliant command set; includes CFI query mode and wider voltage range (2.7–3.6 V), but larger footprint (48-pin TSOP). | Higher density suits complex bootloaders; however, pinout and command set differ-requires PCB redesign and firmware adaptation. | Choose when future scalability to larger firmware images is anticipated and layout flexibility exists for 48-pin package. |
Compared with SST39VF010-55-4C-NHE and MX29LV160CBTI-55G, the AT49BV001AT-55JI uniquely balances proven industrial reliability, 12 V–enabled boot block recovery, and drop-in compatibility with legacy 32-pin PLCC layouts-making it optimal for maintaining existing designs while ensuring field-serviceable firmware integrity.
Availability
AT49BV001AT-55JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded network router boot memory, medical device diagnostic modules, and automotive body control units requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for AT49BV001AT-55JI 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 security ICs, with a legacy of robust Flash and EEPROM solutions for industrial and automotive markets.
The AT49BV001AT series belongs to Atmel's Battery-Voltage™ Flash memory product line, engineered specifically for single-supply, in-system reprogrammable boot code storage in resource-constrained embedded systems.
FAQ
What is the boot block address range for AT49BV001AT-55JI?
The AT49BV001AT-55JI boot block occupies addresses 1C000H to 1FFFFH (16K bytes). This differs from the base AT49BV001A(N), which uses 00000H–03FFFH. The relocated boot sector enables flexible memory mapping in systems where lower address space is reserved for RAM or peripherals.
Does AT49BV001AT-55JI support 12 V programming override?
Yes - the AT49BV001AT-55JI 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 absent in AT49BV001AN(T) variants and is explicitly documented for the AT49BV001AT family.
What package type is used for AT49BV001AT-55JI?
AT49BV001AT-55JI uses the 32-lead Plastic Leaded Chip Carrier (PLCC) package, designated as 32J per Atmel's ordering information. Its dimensions conform to JEDEC MS-016, Variation AE, with pin 1 identified by a corner chamfer.
How does hardware data protection work in AT49BV001AT-55JI?
AT49BV001AT-55JI implements three hardware protections: (1) VCC sense disables programming below ~1.8 V; (2) holding OE low, CE high, or WE high inhibits write cycles; and (3) a noise filter rejects input pulses shorter than 15 ns on WE or CE pins-preventing spurious commands from EMI or glitches.
Can AT49BV001AT-55JI be used in place of AT49BV001A-55JI?
No - AT49BV001AT-55JI and AT49BV001A-55JI have different boot block address mappings (1C000H–1FFFFH vs. 00000H–03FFFH) and distinct device identification codes (04H vs. 05H). Firmware relying on boot sector location or ID reading will not function interchangeably without modification.
AT49BV001AT-55JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- 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:
- 55 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49BV001AT-55JI FAQ
1.How can I place an order for AT49BV001AT-55JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001AT-55JI 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 AT49BV001AT-55JI reliable?
The price and inventory of AT49BV001AT-55JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001AT-55JI is usually 5 days.
3.What payment methods are accepted for AT49BV001AT-55JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001AT-55JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001AT-55JI?
AT49BV001AT-55JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001AT-55JI 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 AT49BV001AT-55JI?
For technical support, including AT49BV001AT-55JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001AT-55JI requirements.
6.How does Aetrix verify that AT49BV001AT-55JI is sourced from the original manufacturer or authorized distributors?
All AT49BV001AT-55JI 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 AT49BV001AT-55JI meets industry standards.
7.What is the process for return or replacement of AT49BV001AT-55JI?
All AT49BV001AT-55JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001AT-55JI, 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 AT49BV001AT-55JI part is unused and in its original packaging.
Return procedure for AT49BV001AT-55JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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