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Microchip Technology AT49BV001A-55JI
- Part No.:
- AT49BV001A-55JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV001A-55JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,142
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Product details
Overview
AT49BV001A-55JI from Atmel is a 1 Mbit (128K × 8) single-supply Flash memory IC designed for in-system reprogrammability in embedded control and 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, features hardware data protection, and includes sector-erasable architecture with a dedicated 16K-byte boot block.
For engineers reviewing the AT49BV001A-55JI datasheet, AT49BV001A-55JI pinout, AT49BV001A-55JI application, or AT49BV001A-55JI equivalent, this device serves as a battery-voltage-compatible, industrial-grade Flash memory for firmware storage, parameter retention, and secure boot code execution where low-power standby (50 µA), fast erase (3 s), and hardware lockout of boot sectors are critical design requirements.
Technical Context
The AT49BV001A-55JI implements a standard parallel interface with CE/OE/WE control logic, enabling EPROM-like read operation and command-based programming/erasure. Its internal program controller manages all timing, eliminating external high-voltage generators or clocks during write cycles.
Memory organization comprises one 16K-byte boot block (address 00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (32K + 64K bytes). Sector erase and chip erase are executed via six-cycle software command sequences, with DATA polling and toggle-bit status detection confirming completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits) - sufficient for full boot loader + configuration data in space-constrained microcontroller systems |
| Read Access Time | 55 ns - enables direct interfacing with 16–20 MHz microcontrollers without wait states |
| Supply Voltage | 2.7 V to 3.6 V - compatible with single-cell Li-ion or regulated 3.3 V rails, eliminating level-shifting needs |
| Byte Programming Time | 30 µs typical - allows rapid field updates of small firmware patches or calibration tables |
| Erase Cycle Time | 3 seconds max - supports efficient background reprogramming without system downtime |
| Endurance | 10,000 write/erase cycles - validated for long-term use in industrial logging and configuration storage |
| Standby Current | 50 µA CMOS - meets ultra-low-power requirements for battery-backed or energy-harvesting systems |
Pinout & Package
AT49BV001A-55JI is packaged in a 32-lead PLCC (32J) with JEDEC MS-016, Variation AE compliance. Package dimensions: 12.32 mm × 14.86 mm × 3.38 mm (max height), lead pitch 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A11 is don't-care in some command cycles |
| CE | Chip Enable | Active-low chip select; must be low for read/write; high forces outputs to high-Z and reduces current to 50 µA |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention during reads; high disables outputs |
| WE | Write Enable | Active-low write strobe; latches address/data during programming/erase command sequences |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path for read, program, and status polling (DATA polling uses I/O7; toggle bit uses I/O6) |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V on RESET overrides boot lockout |
| VCC | Power Supply | 2.7–3.6 V supply; internal voltage sensing inhibits programming if VCC < 1.8 V |
| GND | Ground | Reference for all signals and power; required for stable operation across -40°C to +85°C industrial range |
| NC | No Connect | Pin 1 in PLCC package is unconnected - must remain floating per datasheet Note on AT49BV001AN(T) variants |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte sector (00000H–03FFFH) can be permanently write-protected via command sequence, securing boot code integrity |
| Data Polling & Toggle Bit | Real-time status feedback via I/O7 complement or I/O6 toggling eliminates need for fixed delay timers during programming |
| Sector-Erasable Architecture | Independent erasure of boot block, two 8K parameter blocks, and two main memory blocks (32K/64K) enables granular firmware updates |
| Hardware Data Protection | VCC sense, noise filtering (15 ns pulse rejection), and control-line inhibit (OE low/CE high/WE high) prevent accidental writes |
| In-System Reprogrammability | No external high-voltage generator required; 5 V-only command protocol simplifies integration into existing 3.3 V systems |
Applications
| Industrial PLC Firmware Storage | Automotive ECU Boot Code Retention |
|---|---|
|
Use Scenario: Storing and updating ladder logic firmware and I/O configuration tables in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding startup routines and runtime parameters; accessed during cold boot and field firmware upgrades. Use Value: 50 µA standby current extends backup battery life; 3-second erase enables quick firmware patch deployment without extended downtime. |
Use Scenario: Holding certified boot loader and safety-critical initialization code in engine control units subject to automotive temperature and EMC requirements. IC Role / Device Role / Timing Role: Secure boot memory with hardware lockout preventing unauthorized modification of bootloader integrity checks. Use Value: Boot block lockout ensures ASIL-B compliant code persistence; 2.7–3.6 V operation matches vehicle battery transients without regulation overhead. |
| Medical Device Configuration Storage | Networking Equipment Parameter Memory |
|
Use Scenario: Retaining calibrated sensor offsets, user preferences, and regulatory audit logs in portable diagnostic equipment with limited PCB area. IC Role / Device Role / Timing Role: Parameter memory mapped to microcontroller's external bus; updated only during service mode or calibration cycles. Use Value: Byte-programmability (30 µs/byte) allows efficient storage of sparse calibration data; 10,000-cycle endurance exceeds device lifetime requirements. |
Use Scenario: Storing MAC addresses, VLAN settings, and firmware version metadata in Ethernet switches and routers requiring field-upgradable configurations. IC Role / Device Role / Timing Role: Parallel-interface Flash acting as persistent configuration store, accessed during boot and management interface updates. Use Value: 55 ns read speed supports real-time configuration lookup; sector erase isolates parameter updates from main firmware partitions. |
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, 3.0–3.6 V supply; lacks RESET pin and boot block lockout override via 12 V | No hardware boot lockout override; relies solely on software lock; not suitable where physical reset-line reprogramming is required | Select when boot block security is managed entirely in software and 12 V reset override is unnecessary |
| MX29LV160CBTI-55G | 16 Mbit density, 55 ns access, 2.7–3.6 V; includes CFI-compliant command set and wider sector layout (16 × 8K + 2 × 64K) | Higher capacity and standardized CFI interface simplify migration to larger firmware; no 12 V RESET override for boot block | Select when future firmware growth is anticipated and CFI compatibility with flash programmers is preferred |
Compared with SST39VF010-55-4C-NHE and MX29LV160CBTI-55G, the AT49BV001A-55JI provides unique 12 V RESET-based boot block reprogramming capability and a compact 1 Mbit footprint ideal for legacy or resource-constrained designs where precise sector control and hardware-enforced boot security are prioritized over scalability.
Availability
AT49BV001A-55JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ECU boot code retention, and medical device configuration storage requiring stable component supply across extended product lifecycles.
Supply support for AT49BV001A-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 secure authentication devices.
The AT49BV001A-55JI belongs to Atmel's Battery-Voltage™ Flash memory product line, engineered for reliable in-system reprogramming in 2.7–3.6 V embedded systems where low-power operation and boot-sector protection are essential.
FAQ
What is the operating temperature range for the AT49BV001A-55JI?
The AT49BV001A-55JI is rated for industrial temperature operation from -40°C to +85°C. This range is confirmed in the DC and AC Operating Range table of the datasheet (Rev. 3364C–FLASH–9/03), making it suitable for deployment in factory automation, outdoor networking gear, and automotive under-hood modules where thermal stability is critical. The 55 ns access time is guaranteed across this full range.
Does the AT49BV001A-55JI support hardware reset-based boot block reprogramming?
Yes, the AT49BV001A-55JI supports boot block reprogramming override by applying 12.0 V ± 0.5 V to the RESET pin during chip erase, sector erase, or byte programming operations. This feature is explicitly documented in the "BOOT BLOCK PROGRAMMING LOCKOUT OVERRIDE" section and is not available on the AT49BV001AN(T) variant. The RESET pin must remain at 12 V throughout the entire operation.
How is the boot block protected on the AT49BV001A-55JI?
The AT49BV001A-55JI protects its 16K-byte boot block (00000H–03FFFH) via a six-cycle command sequence that enables permanent lockout. Once enabled, programming and erasure of the boot block are inhibited at input voltages ≤5.5 V. The lockout status can be verified by reading address 00002H in software product identification mode, where I/O0 = high indicates active lockout.
What package type is used for the AT49BV001A-55JI?
The AT49BV001A-55JI uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package, designated as 32J per Atmel's ordering information. Its mechanical dimensions conform to JEDEC MS-016, Variation AE, with body size 12.32 mm × 14.86 mm and maximum height 3.38 mm. Pin 1 is marked by a corner chamfer per the PLCC top view diagram.
Can the AT49BV001A-55JI be used with a 3.3 V microcontroller without level shifters?
Yes, the AT49BV001A-55JI operates natively from 2.7 V to 3.6 V and specifies VIH = 2.0 V and VOL = 0.45 V (IOL = 2.1 mA), ensuring full logic compatibility with standard 3.3 V CMOS microcontrollers. Its input thresholds and output drive strength eliminate the need for external level-shifting circuitry in direct-bus interfacing scenarios.
AT49BV001A-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)
AT49BV001A-55JI FAQ
1.How can I place an order for AT49BV001A-55JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001A-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 AT49BV001A-55JI reliable?
The price and inventory of AT49BV001A-55JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001A-55JI is usually 5 days.
3.What payment methods are accepted for AT49BV001A-55JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001A-55JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001A-55JI?
AT49BV001A-55JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001A-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 AT49BV001A-55JI?
For technical support, including AT49BV001A-55JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001A-55JI requirements.
6.How does Aetrix verify that AT49BV001A-55JI is sourced from the original manufacturer or authorized distributors?
All AT49BV001A-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 AT49BV001A-55JI meets industry standards.
7.What is the process for return or replacement of AT49BV001A-55JI?
All AT49BV001A-55JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001A-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 AT49BV001A-55JI part is unused and in its original packaging.
Return procedure for AT49BV001A-55JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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