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Microchip Technology AT49F002ANT-55TU
- Part No.:
- AT49F002ANT-55TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F002ANT-55TU.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,824
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Product details
Overview
AT49F002ANT-55TU from Atmel is a 2 Mbit (256K × 8) single-supply 5V-only Flash memory IC with 55 ns read access time, sector-based architecture (16K-byte boot block + two 8K-byte parameter blocks + four main memory blocks), and hardware data protection. It supports byte-by-byte programming (20 µs/byte typical), chip/sector erase (4 s max), and DATA polling for end-of-program detection - used in embedded firmware storage and boot code retention applications.
For engineers reviewing the AT49F002ANT-55TU datasheet, AT49F002ANT-55TU pinout, AT49F002ANT-55TU application, or AT49F002ANT-55TU equivalent, key selection criteria include industrial temperature range (-40°C to +85°C), TSOP-32 package compatibility, boot block lockout capability, 5V-only reprogrammability, and CMOS standby current (100 µA).
Technical Context
The AT49F002ANT-55TU implements a standard parallel Flash interface with CE/OE/WE control logic, supporting EPROM-like read operation and command-based sector erase and byte programming. Its internal program controller manages timing for erase (4 s max) and programming (20 µs/byte typical), eliminating external high-voltage requirements.
Boot block lockout is implemented via a six-cycle command sequence; once enabled, the 16K-byte boot sector (address range 3C000H–3FFFFH) becomes permanently protected under ≤5.5V operation. The RESET pin enables boot block override only at 12V ± 0.5V - a feature excluded in AN(T) variants but confirmed absent for AT49F002ANT-55TU per datasheet section 4.3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - sufficient for full bootloader + configuration data in resource-constrained microcontrollers. |
| Read Access Time | 55 ns - enables direct connection to 16–20 MHz bus systems without wait states. |
| Byte Programming Time | 20 µs typical - allows rapid field updates of small firmware patches without system downtime. |
| Erase Cycle Time | 4 seconds maximum - supports fast in-system reprogramming during manufacturing test or field service. |
| Supply Voltage | 5 V ± 10% - eliminates need for dedicated programming voltage rails; compatible with legacy 5V logic families. |
| Standby Current | 100 µA CMOS - enables low-power retention in battery-backed or energy-sensitive embedded systems. |
| Endurance | 10,000 write/erase cycles - validated for frequent firmware revision in industrial controllers and telecom modules. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade deployment in motor drives, PLCs, and network infrastructure. |
Pinout & Package
AT49F002ANT-55TU is packaged in a 32-lead Plastic Thin Small Outline Package (TSOP, Type I, 8 × 20 mm), compliant with JEDEC MO-142 Variation BD. Pin 9 is no-connect (NC) per datasheet section 2.2.
| 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 | Data Inputs/Outputs | 8-bit bidirectional data bus; supports DATA polling on I/O7 and toggle bit detection on I/O6. |
| 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 reads. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-impedance outputs - not usable for boot block override (excluded in AN(T) variants). |
| VCC | Power Supply | +5 V supply; internal VCC sense disables programming if voltage drops below 3.8 V. |
| GND | Ground | Reference ground for all signals and power; decoupling required within 10 mm of VCC pin. |
| Pin 9 | No Connect | Physically present but unconnected internally - must be left floating or tied to GND per design guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | One 16K-byte boot block (3C000H–3FFFFH), two 8K-byte parameter blocks, and four main memory blocks - enables selective firmware update without erasing critical boot code. |
| Boot Block Lockout | Software-enabled permanent protection of boot sector under ≤5.5V; prevents accidental corruption of startup routines in deployed systems. |
| DATA Polling | Real-time end-of-program detection via complemented data on I/O7 - eliminates fixed delay timers and improves programming throughput. |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulse rejection), and control-line inhibition (OE low/CE high/WE high) prevent spurious writes during power transients or EMI events. |
| Green Packaging | Pb/halide-free TSOP-32 package (JU/TU/VU suffix) - meets RoHS Directive 2011/65/EU and IPC/JEDEC J-STD-609A Class 1 requirements. |
Applications
| Industrial PLC Firmware Storage | Telecom Line Card Boot Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing reliable code execution after cold start; 55 ns access ensures deterministic boot timing. Use Value: Sector erase enables field-upgradable application logic while preserving immutable boot loader in protected 16K-byte block. | Use Scenario: Holding boot code and initialization routines for carrier-grade DSLAM and optical line terminal line cards. IC Role / Device Role / Timing Role: Primary boot device interfacing directly to microcontroller address/data bus; operates across -40°C to +85°C ambient. Use Value: 100 µA standby current extends uptime during maintenance mode; hardware write protection prevents corruption during hot-swap events. |
| Medical Diagnostic Equipment BIOS | Automotive Body Control Module (BCM) |
Use Scenario: Storing safety-critical boot firmware and calibration data in portable ultrasound and MRI subsystems requiring regulatory compliance. IC Role / Device Role / Timing Role: Secure boot memory with lockout-enforced integrity; supports traceable firmware versioning via software product ID mode. Use Value: 10,000-cycle endurance accommodates periodic FDA-mandated firmware validation and patch deployment. | Use Scenario: Hosting bootloader and CAN protocol stack in automotive body control units exposed to wide thermal cycling. IC Role / Device Role / Timing Role: Parallel Flash memory mapped into MCU's external memory space; 5V-only operation simplifies power architecture. Use Value: TSOP-32 package enables compact PCB layout; boot block lockout ensures ASIL-B compliant boot integrity. |
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 | 3 V core with 5 V tolerant I/O; 55 ns access; 2 Mbit density; different command set and sector map (64K uniform blocks). | Lacks dedicated boot block lockout; requires level-shifting for pure 5V systems. | Choose when migrating to lower-voltage platforms or needing uniform block erase granularity. |
| SST39VF020-55-4C-NHE | 3.3 V supply; 55 ns access; 2 Mbit; byte-programmable; no RESET pin; different command protocol (no 12V override). | Not pin-compatible; requires redesign of power and control logic; no boot block lockout override capability. | Prefer for cost-sensitive 3.3V designs where boot protection is managed in software or external logic. |
Compared with AM29LV002BT-55REI and SST39VF020-55-4C-NHE, the AT49F002ANT-55TU uniquely delivers 5V-only operation with hardware-enforced boot block lockout and TSOP-32 pinout compatibility - making it optimal for legacy 5V embedded systems requiring field-upgradable yet tamper-resistant firmware storage.
Availability
AT49F002ANT-55TU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom line card boot memory, and medical diagnostic equipment BIOS requiring stable component supply and long-term lifecycle support.
Supply support for AT49F002ANT-55TU 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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and security ICs.
The AT49F002A(N)(T) series was designed for in-system reprogrammable firmware storage in 5V embedded systems, emphasizing boot code integrity, sector-level flexibility, and industrial temperature reliability.
FAQ
What is the boot block address range for AT49F002ANT-55TU?
The boot block for AT49F002ANT-55TU occupies address range 3C000H to 3FFFFH (16K bytes), distinct from the AT49F002AN(T) variant which uses 00000H–03FFFH. This relocation supports top-boot architecture in memory-mapped systems. The AT49F002ANT-55TU datasheet confirms this mapping in section 4.6 and note 3 of the Command Definition Table.
Does AT49F002ANT-55TU support boot block programming lockout override via RESET?
No - AT49F002ANT-55TU does not support 12V RESET override for boot block lockout. Section 4.3 explicitly states "The RESET feature is not available for the AT49F002AN(T)", and AT49F002ANT-55TU falls under the AN(T) family per ordering code structure and datasheet footnote 6. Therefore, once lockout is enabled, boot block reprogramming requires full device replacement.
What is the meaning of the 'TU' suffix in AT49F002ANT-55TU?
The 'TU' suffix denotes the green (Pb/halide-free) packaging option in TSOP-32 (32T) format, as defined in datasheet section 27.2. It indicates compliance with RoHS Directive 2011/65/EU and use of environmentally optimized materials, while maintaining identical electrical and timing specifications as the standard 'TI' variant.
Can AT49F002ANT-55TU be used in place of AT49F002A-55TI?
No - AT49F002ANT-55TU is not a drop-in replacement for AT49F002A-55TI. The 'N' denotes no-connect pin configuration (pin 1 in PLCC, pin 9 in TSOP), and 'T' indicates top-boot address mapping (3C000H–3FFFFH). These differences affect both hardware layout (NC pin handling) and firmware address allocation, requiring board and software revisions.
What is the maximum erase time for a single sector in AT49F002ANT-55TU?
The datasheet specifies a maximum erase cycle time of 4 seconds for chip erase (tEC), but does not define a separate maximum for sector erase. Section 4.4.2 confirms sector erase is "internally controlled" and "will automatically time to completion", implying the same 4-second upper bound applies to individual sectors - consistent with the device's unified erase controller architecture.
AT49F002ANT-55TU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm 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-TSOP
AT49F002ANT-55TU FAQ
1.How can I place an order for AT49F002ANT-55TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002ANT-55TU 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-55TU reliable?
The price and inventory of AT49F002ANT-55TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002ANT-55TU is usually 5 days.
3.What payment methods are accepted for AT49F002ANT-55TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002ANT-55TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002ANT-55TU?
AT49F002ANT-55TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002ANT-55TU 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-55TU?
For technical support, including AT49F002ANT-55TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002ANT-55TU requirements.
6.How does Aetrix verify that AT49F002ANT-55TU is sourced from the original manufacturer or authorized distributors?
All AT49F002ANT-55TU 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-55TU meets industry standards.
7.What is the process for return or replacement of AT49F002ANT-55TU?
All AT49F002ANT-55TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002ANT-55TU, 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-55TU part is unused and in its original packaging.
Return procedure for AT49F002ANT-55TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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