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Microchip Technology AT49BV001A-55VI
- Part No.:
- AT49BV001A-55VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV001A-55VI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,570
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Product details
Overview
AT49BV001A-55VI 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, 30 µs/byte programming, and sector-erasable architecture including a 16K-byte boot block with hardware lockout. It operates across the industrial temperature range (−40°C to +85°C) and is used in embedded firmware storage for microcontroller-based systems requiring field-upgradable code.
For engineers reviewing the AT49BV001A-55VI datasheet, AT49BV001A-55VI pinout, AT49BV001A-55VI application, or AT49BV001A-55VI equivalent, this page delivers verified electrical specs, PLCC-32 package mapping, boot-block protection behavior, sector erase timing, and direct alternatives for firmware storage replacement in industrial control and legacy MCU platforms.
Technical Context
The AT49BV001A-55VI implements a standard parallel Flash interface with CE/OE/WE control logic and supports EPROM-like read operation, byte-programming, and software-commanded sector or chip erase. Its internal program controller manages erase timing autonomously without external clocks.
It features dual-mode boot block protection: permanent lockout on AT49BV001AN(T), and voltage-gated override (12 V on RESET) on AT49BV001A(T); the -55VI variant corresponds to the AT49BV001A family and supports RESET-based override. Sector architecture includes one 16K-byte boot block, two 8K-byte parameter blocks, and two main memory blocks (32K + 64K bytes).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - directly replaces EPROMs in 8-bit bus systems. |
| Read Access Time | 55 ns max - enables direct interfacing with 16–20 MHz microcontrollers without wait states. |
| Supply Voltage | 2.7 V to 3.6 V - supports battery-backed and low-voltage industrial power rails without level shifters. |
| Byte Programming Time | 30 µs typical - allows rapid field updates of small firmware patches without system downtime. |
| Erase Cycle Time | 3 seconds max for full chip - deterministic timing simplifies host firmware timeout handling. |
| End-of-Program Detection | DATA polling (I/O7 complement) or Toggle Bit (I/O6 toggling) - eliminates need for fixed delay loops during programming. |
| Write Endurance | 10,000 program/erase cycles - sufficient for infrequent firmware upgrades over 10+ year product life. |
Pinout & Package
AT49BV001A-55VI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016, Variation AE, with dimensions 12.4 mm × 12.4 mm × 3.4 mm (max height). Pin 1 identifier is a corner chamfer.
| 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 command cycles. |
| 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 prevent bus contention during shared-memory access. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming. |
| RESET | Reset Input | Active-low reset; applying 12 V enables boot block reprogramming even when lockout is active. |
| I/O0–I/O7 | Data I/O Bus | Bidirectional 8-bit data path; supports DATA polling on I/O7 and Toggle Bit detection on I/O6. |
| VCC | Power Supply | 2.7–3.6 V supply; internal voltage regulation ensures stable core operation across rail variation. |
| GND | Ground | Reference for all inputs/outputs; decoupling capacitor required within 1 cm of VCC pin. |
| NC | No Connect | Pin 1 in PLCC is unconnected - must remain floating or tied to GND per design guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte region (00000H–03FFFH) protected via 6-byte command sequence; prevents accidental overwrite of bootloader code. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filter (<15 ns pulses ignored), and control-line interlock (OE low/CE high/WE high blocks writes). |
| Sector-Erasable Architecture | Independent erasure of boot block, two 8K parameter blocks, and two main memory blocks (32K/64K) - enables modular firmware updates. |
| Low-Power Operation | 15 mA active current and 50 µA CMOS standby current - suitable for battery-powered or energy-sensitive industrial nodes. |
| Standard Command Interface | 5V-compatible command set (e.g., 555H/AAH, AAH/55H, 80H) executed via WE/CE toggling - eliminates need for dedicated programming hardware. |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Bootloader Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; provides 55 ns read access to support real-time scan cycle execution. Use Value: Enables remote firmware patching without hardware replacement; boot block lockout ensures bootloader integrity during field updates. | Use Scenario: Hosting boot code for 8051- or Z80-based embedded systems where space-constrained PCBs require minimal external memory footprint. IC Role / Device Role / Timing Role: Primary firmware ROM replacement; operates as memory-mapped device on 8-bit data bus with standard CE/OE/WE timing. Use Value: Eliminates need for UV-EPROM sockets and erasers; 30 µs/byte programming allows fast development iteration during bring-up. |
| Medical Device Configuration Storage | Point-of-Sale Terminal Parameter Memory |
Use Scenario: Retaining calibrated sensor offsets and safety-critical configuration parameters in Class II medical instruments requiring long-term data retention. IC Role / Device Role / Timing Role: Parameter block storage (two 8K sections) with independent sector erase - isolates calibration data from application code updates. Use Value: Prevents corruption of calibration values during firmware upgrades; 10,000-cycle endurance exceeds regulatory lifetime requirements. | Use Scenario: Storing localized language strings, tax tables, and peripheral driver settings in retail POS terminals subject to frequent regional software updates. IC Role / Device Role / Timing Role: Field-upgradable nonvolatile memory mapped to microcontroller address space; accessed via standard read/write bus cycles. Use Value: Allows overnight software rollouts across distributed retail networks without physical technician visits or device downtime. |
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 | 512K × 8 density, 55 ns access, 3.0–3.6 V supply; lacks RESET-based boot block override. | Half the capacity; suitable only where firmware size ≤ 512 KB and boot protection via software-only methods is acceptable. | Select when board space or cost constraints prioritize smaller density and simpler protection scheme. |
| MX29LV001CTTI-55G | 1 Mbit, 55 ns, 3.0–3.6 V; boot block at top address (1F000H–1FFFFH); no 12 V RESET override capability. | Boot block location differs (top vs bottom); requires firmware address remapping; no hardware override for locked boot sectors. | Choose when existing layout uses top-boot architecture and 12 V override is not required for field recovery. |
Compared with SST39VF010-55-4C-NHE and MX29LV001CTTI-55G, the AT49BV001A-55VI uniquely supports 12 V RESET-driven boot block reprogramming and offers bottom-addressed 16K boot sector with deterministic 3-second chip erase - critical for fail-safe firmware recovery in industrial deployments.
Availability
AT49BV001A-55VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller bootloader memory, medical device configuration storage, and point-of-sale terminal parameter memory requiring stable component supply across extended product lifecycles.
Supply support for AT49BV001A-55VI 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-55VI belongs to Atmel's Battery-Voltage™ Flash memory product line, designed specifically for reliable in-system reprogramming in 2.7–3.6 V embedded systems where EPROM replacement and field firmware upgradability are essential.
FAQ
What is the operating temperature range for the AT49BV001A-55VI?
The AT49BV001A-55VI is rated for industrial operation from −40°C to +85°C. This range is validated per its DC and AC specifications, including 55 ns read access time and 15 mA active current, ensuring reliable performance in harsh environments such as factory floors or outdoor kiosks where thermal cycling occurs.
Does the AT49BV001A-55VI support boot block reprogramming after lockout is enabled?
Yes, the AT49BV001A-55VI supports boot block reprogramming after lockout activation by applying 12.0 V ± 0.5 V to the RESET pin during chip erase, sector erase, or byte programming operations. This hardware override is a distinguishing feature of the AT49BV001A(T) variant family, to which AT49BV001A-55VI belongs.
What package type is used for the AT49BV001A-55VI?
The AT49BV001A-55VI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package, designated as 32J per Atmel's ordering information. Its mechanical dimensions conform to JEDEC MS-016, Variation AE, with a body size of 12.4 mm × 12.4 mm and maximum height of 3.4 mm.
How does the AT49BV001A-55VI detect end-of-program without polling the status register?
The AT49BV001A-55VI provides Toggle Bit detection on I/O6: during programming or erase, successive reads cause I/O6 to toggle between 0 and 1; when toggling stops, the operation is complete. This method requires no status register access and works at any address, enabling simple, timing-agnostic host firmware.
Can the AT49BV001A-55VI be used as a direct replacement for standard EPROMs like the 27C010?
Yes, the AT49BV001A-55VI is pin-compatible with 32-pin EPROMs such as the 27C010 in PLCC-32 packages and supports identical CE/OE/WE read protocols. However, it requires no UV eraser or 12.5 V programming voltage - instead using 2.7–3.6 V and software commands - making it a drop-in upgrade for systems needing field reprogrammability.
AT49BV001A-55VI 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:
- 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-VSOP
AT49BV001A-55VI FAQ
1.How can I place an order for AT49BV001A-55VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001A-55VI 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-55VI reliable?
The price and inventory of AT49BV001A-55VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001A-55VI is usually 5 days.
3.What payment methods are accepted for AT49BV001A-55VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001A-55VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001A-55VI?
AT49BV001A-55VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001A-55VI 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-55VI?
For technical support, including AT49BV001A-55VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001A-55VI requirements.
6.How does Aetrix verify that AT49BV001A-55VI is sourced from the original manufacturer or authorized distributors?
All AT49BV001A-55VI 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-55VI meets industry standards.
7.What is the process for return or replacement of AT49BV001A-55VI?
All AT49BV001A-55VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001A-55VI, 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-55VI part is unused and in its original packaging.
Return procedure for AT49BV001A-55VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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