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Microchip Technology AT49F002ANT-55VU
- Part No.:
- AT49F002ANT-55VU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F002ANT-55VU.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,679
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Product details
Overview
AT49F002ANT-55VU from Atmel is a 2-Mbit (256K × 8) 5V-only in-system reprogrammable Flash memory with 55 ns read access time, 20 µs/byte programming, and sector-based architecture including one 16K-byte boot block, two 8K-byte parameter blocks, and four main memory blocks (32K + 3×64K). It supports DATA polling and toggle-bit erase/program completion detection and is used in embedded firmware storage where secure boot code protection and field-upgradable application code are required.
For engineers reviewing the AT49F002ANT-55VU datasheet, AT49F002ANT-55VU pinout, AT49F002ANT-55VU application, or AT49F002ANT-55VU equivalent, this page delivers verified electrical specs, PLCC/TSOP/VSOP package mapping, boot-block lockout behavior, hardware data protection logic, and real-world use cases for industrial control firmware, BIOS storage, and legacy microcontroller boot loaders.
Technical Context
The AT49F002ANT-55VU implements a command-register–based Flash architecture with software-controlled sector erase and byte programming. Its internal program control logic eliminates external high-voltage requirements, enabling 5V-only operation for both read and reprogramming. The device uses standard CE/OE/WE control signals compatible with EPROM interfaces and includes dedicated RESET pin functionality - though RESET-based boot-block override is disabled in the AN(T) variant.
Memory organization is fixed: for AT49F002ANT-55VU, the 16K-byte boot block resides at address 3C000H–3FFFFH, parameter blocks at 3A000H–3BFFFH and 38000H–39FFFH, and main memory blocks span 30000H–37FFFH, 20000H–2FFFFH, 10000H–1FFFFH, and 00000H–0FFFFH. Sector erase and chip erase operations are internally timed, with maximum erase cycle time of 4 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), sufficient for full firmware images in 8-bit microcontroller systems |
| Read Access Time | 55 ns - enables direct execution from Flash in timing-critical 5V bus systems |
| Byte Programming Time | 20 µs typical - allows rapid field updates without system downtime |
| Erase Cycle Time | 4 seconds max - supports efficient sector-level reconfiguration during maintenance |
| Endurance | 10,000 write/erase cycles - validated for long-term deployment in industrial firmware storage |
| Power Dissipation | 30 mA active / 100 µA CMOS standby - suitable for low-power embedded applications |
| Operating Voltage | 5V ±10% - single-rail compatibility with legacy 5V logic and microcontrollers |
| Temperature Range | −40°C to +85°C industrial grade - qualified for factory automation and motor control environments |
Pinout & Package
AT49F002ANT-55VU is available in 32-lead VSOP (8 × 14 mm) package per JEDEC MO-142 BA. Pin 1 is marked by notch or dot; pin 9 is no-connect (NC) in TSOP/VSOP variants. All packages share identical signal mapping and function assignment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A11 is don't-care in command cycles |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with standard microprocessor data buses |
| CE | Chip Enable | Active-low chip select; when high, outputs enter high-impedance state to prevent bus contention |
| OE | Output Enable | Active-low output gate; used with CE to implement dual-line read control per EPROM convention |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming |
| RESET | Reset Control | Active-low reset input; halts ongoing operations and forces high-Z outputs; 12V override disabled in AN(T) variant |
| VCC | Power Supply | +5V ±10% supply; VCC sense circuitry inhibits programming if voltage drops below 3.8V |
| GND | Ground Reference | Signal and power ground reference; decoupling required within 10 mm of VCC pin |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Supply Operation | Eliminates need for +12V programming voltage, simplifying power design and enabling in-system reprogramming via standard logic rails |
| Boot Block Programming Lockout | 16K-byte region (3C000H–3FFFFH) can be permanently write-protected to preserve secure boot code integrity |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulse rejection), and control-line inhibit (OE low/CE high/WE high) prevent accidental writes |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide real-time, non-intrusive program/erase status without requiring external timers or interrupts |
| Sector Erase Architecture | Independent erasure of two 8K-byte parameter blocks and four main memory blocks enables granular firmware updates without full chip erase |
Applications
| Industrial PLC Firmware Storage | Legacy BIOS/UEFI Boot ROM |
|---|---|
Use Scenario: Storing ladder logic programs and configuration data in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with fast 55 ns read access enabling deterministic scan-cycle execution. Use Value: Boot block lockout ensures bootloader remains unaltered across 10,000+ field updates, while sector erase allows safe parameter block revision without risking core logic. | Use Scenario: Holding initialization code and hardware abstraction layer in x86-compatible motherboards using legacy 5V bus architectures. IC Role / Device Role / Timing Role: EPROM-compatible Flash memory serving as primary boot ROM with CE/OE/WE timing matching Intel 80x86 bus protocols. Use Value: 20 µs/byte programming enables rapid BIOS patching during manufacturing test; 100 µA standby current reduces platform quiescent power. |
| Microcontroller-Based Motor Drive Bootloader | Point-of-Sale Terminal Application Code Storage |
Use Scenario: Hosting secure bootloader code that validates and loads application firmware over CAN or RS-485 in servo drive systems. IC Role / Device Role / Timing Role: Trusted boot memory with hardware-enforced write protection on boot sector (3C000H–3FFFFH) to prevent malicious overwrite. Use Value: RESET pin tied to MCU's reset controller provides synchronized recovery; DATA polling allows bootloader to verify flash integrity before jump-to-application. | Use Scenario: Storing payment processing application binaries and localization assets in retail terminals deployed globally. IC Role / Device Role / Timing Role: Field-upgradable firmware storage supporting over-the-air updates via serial interface with minimal host CPU overhead. Use Value: Sector erase capability isolates application code updates from critical parameter blocks (e.g., tax tables, encryption keys), reducing update failure risk and rollback complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV002BT-55REI | 4 Mbit density, 55 ns access, 3.0–3.6V operation; requires 12V for reset override; no boot block lockout command sequence | Designed for 3.3V systems; lacks dedicated boot-sector protection logic; incompatible voltage domain | Select only if migrating to 3.3V platform and accepting higher voltage reset requirement for sector unlock |
| SST39VF020-55-4C-NHE | 2 Mbit, 55 ns, 3.0–3.6V; features Top/Bottom boot-block configuration and 100,000 endurance; no 12V RESET override | Optimized for 3.3V embedded systems; boot block size configurable; higher endurance but narrower voltage range | Prefer for new 3.3V designs requiring extended lifecycle; not drop-in compatible due to voltage and command set differences |
Compared with AM29LV002BT-55REI and SST39VF020-55-4C-NHE, the AT49F002ANT-55VU uniquely supports 5V-only operation with hardware-enforced boot block lockout and 12V RESET override (disabled in AN(T)), making it the sole choice for legacy 5V industrial systems requiring guaranteed bootloader immutability.
Availability
AT49F002ANT-55VU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy BIOS/UEFI boot ROM, and microcontroller-based motor drive bootloader applications requiring stable component supply and long-term obsolescence management.
Supply support for AT49F002ANT-55VU 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, Flash memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT49F002A(N)(T) product line was designed for 5V in-system reprogrammable firmware storage in legacy embedded systems, emphasizing boot code security, EPROM compatibility, and robustness under industrial temperature conditions.
FAQ
What is the boot block address range for AT49F002ANT-55VU?
The boot block for AT49F002ANT-55VU occupies address range 3C000H to 3FFFFH (16K bytes). This differs from the base AT49F002A(N) variant, which places the boot block at 00000H–03FFFH. The relocated boot sector enables flexible memory mapping in systems requiring top-of-memory boot code placement, and its lockout feature prevents unauthorized modification once enabled. AT49F002ANT-55VU retains full compatibility with the command set defined for the AT49F002A(N)(T) family.
Does AT49F002ANT-55VU support 12V RESET override for boot block reprogramming?
No, AT49F002ANT-55VU does not support 12V RESET override. Per datasheet section 4.3 and footnote 6, the RESET-based boot block programming lockout override is explicitly unavailable for AT49F002AN(T) variants, including AT49F002ANT-55VU. Once the boot block lockout is enabled via the six-cycle command sequence, the 16K-byte region at 3C000H–3FFFFH cannot be erased or programmed using any voltage ≤5.5V. This design enforces strict bootloader integrity in safety-critical deployments.
What package types are available for AT49F002ANT-55VU?
AT49F002ANT-55VU is offered exclusively in the 32-lead VSOP (8 × 14 mm) package, designated by suffix "VU" (Green Pb/Halide-free). Unlike earlier variants (e.g., "JI", "TI"), the "VU" ordering code confirms compliance with RoHS and JEDEC MO-142 BA specifications. Pin 9 is NC in this package, consistent with all TSOP/VSOP variants of the AT49F002A(N)(T) family. PLCC (32J) and standard TSOP (32T) are not available for the "VU" green variant.
How does hardware data protection work in AT49F002ANT-55VU?
AT49F002ANT-55VU implements three hardware data protection mechanisms: (1) VCC sense circuitry disables programming if supply voltage falls below 3.8V; (2) Program inhibit logic blocks writes when OE is low, CE is high, or WE is high; and (3) a noise filter rejects input pulses shorter than 15 ns on WE or CE pins. These features operate independently of software commands and ensure accidental writes cannot occur during power transients, bus glitches, or improper control signal sequencing - critical for reliable field operation of AT49F002ANT-55VU.
Can AT49F002ANT-55VU be used as a direct replacement for AT49F002A-55JI?
No, AT49F002ANT-55VU is not a direct replacement for AT49F002A-55JI due to three key differences: (1) boot block location (3C000H–3FFFFH vs. 00000H–03FFFH); (2) RESET override disablement in AN(T) variants; and (3) VSOP green packaging (VU) versus PLCC (JI). While pinout and command set are identical, firmware must be relocated to match the top-aligned boot sector, and bootloader protection logic must account for missing 12V override. AT49F002ANT-55VU requires board-level validation before substitution.
AT49F002ANT-55VU 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:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49F002ANT-55VU FAQ
1.How can I place an order for AT49F002ANT-55VU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002ANT-55VU 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 AT49F002ANT-55VU reliable?
The price and inventory of AT49F002ANT-55VU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002ANT-55VU is usually 5 days.
3.What payment methods are accepted for AT49F002ANT-55VU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002ANT-55VU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002ANT-55VU?
AT49F002ANT-55VU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002ANT-55VU 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 AT49F002ANT-55VU?
For technical support, including AT49F002ANT-55VU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002ANT-55VU requirements.
6.How does Aetrix verify that AT49F002ANT-55VU is sourced from the original manufacturer or authorized distributors?
All AT49F002ANT-55VU 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 AT49F002ANT-55VU meets industry standards.
7.What is the process for return or replacement of AT49F002ANT-55VU?
All AT49F002ANT-55VU units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002ANT-55VU, 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 AT49F002ANT-55VU part is unused and in its original packaging.
Return procedure for AT49F002ANT-55VU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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