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Microchip Technology AT49BV001ANT-55JI
- Part No.:
- AT49BV001ANT-55JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV001ANT-55JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,319
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Product details
Overview
AT49BV001ANT-55JI from Atmel is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory IC with 55 ns read access time, 3-second chip erase, 30 µs/byte programming, and hardware data protection. It features sector architecture including a 16K-byte boot block with programmable lockout, used for secure firmware storage in embedded microcontroller boot loaders.
For engineers reviewing the AT49BV001ANT-55JI datasheet, AT49BV001ANT-55JI pinout, AT49BV001ANT-55JI application, or AT49BV001ANT-55JI equivalent, key selection considerations include its PLCC-32 industrial-grade packaging, boot-block write protection logic, DATA polling/toggle-bit program verification, and compatibility with standard EPROM-like bus interface timing.
Technical Context
The AT49BV001ANT-55JI implements a command-register-based architecture requiring six-byte software sequences for chip/sector erase and boot-lock enable, with internal timing eliminating external clocks. Its memory map allocates the boot block at 1C000H–1FFFFH, distinct from the AT49BV001A(N) variant's 00000H–03FFFH range.
It supports standard microprocessor read/write timing with CE/OE/WE control, includes VCC sense and noise filtering for inadvertent-write prevention, and uses DATA polling on I/O7 or toggle-bit detection on I/O6 to signal program/erase completion - both usable at any point during the operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits |
| Read Access Time | 55 ns - enables direct replacement of 55 ns EPROMs without timing redesign |
| Supply Voltage | 2.7–3.6 V - operates from single battery or low-voltage rail, no 5 V required |
| Byte Programming Time | 30 µs typical - supports fast field updates of small code/data segments |
| Chip Erase Time | 3 seconds max - enables rapid full-memory reinitialization in production or recovery |
| Endurance | 10,000 write/erase cycles - suitable for firmware update applications with moderate revision frequency |
| Standby Current | 50 µA CMOS - minimizes quiescent power in always-on embedded systems |
Pinout & Package
AT49BV001ANT-55JI is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC-32), JEDEC MS-016 compliant, with body dimensions 12.4 mm × 12.4 mm × 3.4 mm (max height). Pin 1 identifier is a corner chamfer; pin 1 is NC (no connect) per datasheet note.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A11–A16 don't care in some command cycles |
| 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 gate; controls data bus tristate to prevent contention during shared-bus operation |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle timing |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; carries command data, product ID codes, and memory contents |
| RESET* | Reset Input | Active-low reset; high-to-low transition halts ongoing operations; 12 V override enables boot-block reprogramming (not available on AN variant) |
| NC | No Connect | Pin 1 in PLCC package - physically present but unconnected internally |
| VCC / GND | Power Supply | Single 2.7–3.6 V supply; GND reference for all signals and internal logic |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte sector (1C000H–1FFFFH) permanently protected after command sequence; prevents accidental overwrite of bootloader code |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), WE/CE/OE logic interlock, and 15 ns noise filter prevent spurious writes |
| DATA Polling & Toggle Bit | I/O7 complement indicates program completion; I/O6 toggling signals active erase/program - eliminates need for fixed delay timers |
| Sector-Erasable Architecture | Independent 8K-byte parameter blocks + 32K/64K main blocks allow selective updates without full-chip erase |
| In-System Reprogrammability | No high-voltage programmer required; standard 5 V logic levels execute all commands via software sequences |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing immutable bootloader and calibration tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile storage for startup firmware and field-updatable configuration data; accessed during power-on reset and runtime parameter reads. Use Value: Boot block lockout ensures bootloader integrity across 10,000+ field updates; 55 ns access meets real-time scan-cycle timing budgets. | Use Scenario: Holding certified boot code and safety-critical initialization routines in FDA-regulated diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant firmware repository with hardware-enforced write protection for regulatory compliance. Use Value: RESET-pin 12 V override allows authorized reprogramming of locked boot sector during service; 50 µA standby current extends battery backup duration. |
| Automotive ECU Calibration Storage | Networking Equipment Configuration Memory |
Use Scenario: Storing engine calibration maps and emission control parameters in engine control units operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Field-updatable parameter memory accessed via CAN-connected diagnostics; erased/reprogrammed during dealer flash updates. Use Value: Sector erase capability isolates calibration updates from main application code; 3-second chip erase enables rapid reflash during production line testing. | Use Scenario: Retaining switch/router configuration profiles and firmware patches in carrier-grade Ethernet infrastructure. IC Role / Device Role / Timing Role: Persistent storage for boot images and runtime configuration, accessed by MIPS/ARM host processors during cold/warm boot. Use Value: Standard EPROM-compatible interface simplifies integration into legacy designs; DATA polling reduces host CPU polling overhead during firmware load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV001A-55JI | Boot block located at 00000H–03FFFH; RESET pin lacks 12 V override capability | Preferred where boot code resides in lowest memory region and permanent lockout suffices | Select when system design uses base-address boot vector and does not require field-serviceable boot reprogramming |
| SST39VF010-55-4C-NHE | 55 ns access, 3.3 V only, 1 Mbit density; no RESET pin; uses different command set and lacks boot-block lockout | Used where simplified command interface and lower cost outweigh boot security requirements | Choose for cost-sensitive consumer applications lacking bootloader integrity mandates |
Compared with AT49BV001A-55JI, the AT49BV001ANT-55JI provides relocated boot block addressing and RESET-based override for field reprogramming, while SST39VF010 offers simpler command architecture but no hardware-enforced boot protection - making AT49BV001ANT-55JI optimal for safety-critical embedded boot storage.
Availability
AT49BV001ANT-55JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, automotive ECU calibration storage, and networking equipment configuration memory requiring stable component supply across extended temperature ranges.
Supply support for AT49BV001ANT-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(N)(T) family was designed as a drop-in Flash replacement for EPROMs in embedded systems requiring in-system reprogrammability, low-voltage operation, and hardware-protected boot sectors.
FAQ
What is the boot block address range for AT49BV001ANT-55JI?
The boot block for AT49BV001ANT-55JI occupies address range 1C000H to 1FFFFH (16K bytes), distinct from the AT49BV001A(N) variant's 00000H–03FFFH mapping. This relocation accommodates systems requiring higher-address boot vectors. The boot block programming lockout feature, once enabled, prevents writes to this region unless overridden via 12 V applied to the RESET pin during programming - a capability confirmed for the AT49BV001ANT-55JI per datasheet Rev. 3364C.
Does AT49BV001ANT-55JI support 5 V-only programming commands?
Yes, AT49BV001ANT-55JI uses standard 5 V logic-level commands (e.g., 555H/AAH, AAH/55H) for all operations including read, chip erase, sector erase, byte programming, and boot lock enable - despite operating from a 2.7–3.6 V supply. This eliminates need for external voltage translators. The device interprets command sequences based on timing and data patterns, not supply voltage level, enabling compatibility with legacy 5 V microprocessor buses while maintaining low-power operation.
How is program completion detected on AT49BV001ANT-55JI?
AT49BV001ANT-55JI supports two hardware-confirmed methods: DATA polling on I/O7 (complement of written data appears until completion, then true data) and toggle-bit detection on I/O6 (toggles between 0/1 during operation, stabilizes upon finish). Both methods are usable at any time during programming and eliminate reliance on fixed tBP delays. These mechanisms are validated in the AC characteristics table and waveform diagrams of the AT49BV001ANT-55JI datasheet.
What is the function of the NC pin on AT49BV001ANT-55JI PLCC package?
Pin 1 of the AT49BV001ANT-55JI in PLCC-32 package is designated NC (No Connect) - physically present but electrically unconnected internally. This is explicitly documented in the "Note" section of the PLCC top-view diagram and confirmed in the ordering information table. It must remain unconnected in PCB layout; routing or pulling this pin affects neither functionality nor reliability of the AT49BV001ANT-55JI.
Can AT49BV001ANT-55JI be used in place of AT49BV001AN-55JI?
No - AT49BV001ANT-55JI and AT49BV001AN-55JI are not interchangeable due to critical functional differences: the ANT variant includes RESET-pin 12 V override for boot-block reprogramming and locates the boot block at 1C000H–1FFFFH, while the AN variant has no RESET override and places the boot block at 00000H–03FFFH. Substituting one for the other risks boot corruption or failed field updates unless firmware and hardware are co-validated for the specific memory map and protection scheme of the AT49BV001ANT-55JI.
AT49BV001ANT-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)
AT49BV001ANT-55JI FAQ
1.How can I place an order for AT49BV001ANT-55JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001ANT-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 AT49BV001ANT-55JI reliable?
The price and inventory of AT49BV001ANT-55JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001ANT-55JI is usually 5 days.
3.What payment methods are accepted for AT49BV001ANT-55JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001ANT-55JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001ANT-55JI?
AT49BV001ANT-55JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001ANT-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 AT49BV001ANT-55JI?
For technical support, including AT49BV001ANT-55JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001ANT-55JI requirements.
6.How does Aetrix verify that AT49BV001ANT-55JI is sourced from the original manufacturer or authorized distributors?
All AT49BV001ANT-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 AT49BV001ANT-55JI meets industry standards.
7.What is the process for return or replacement of AT49BV001ANT-55JI?
All AT49BV001ANT-55JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001ANT-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 AT49BV001ANT-55JI part is unused and in its original packaging.
Return procedure for AT49BV001ANT-55JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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