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Microchip Technology AT49F002AN-55TU
- Part No.:
- AT49F002AN-55TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F002AN-55TU.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,147
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Product details
Overview
AT49F002AN-55TU from Atmel is a 2 Mbit (256K × 8) 5V-only in-system reprogrammable Flash memory IC with 55 ns read access time, 20 µs/byte programming, 4-second chip erase, and sector architecture including a 16K-byte boot block with programmable lockout. It operates across the industrial temperature range (−40°C to +85°C) and supports standard EPROM-like CE/OE/WE control for embedded firmware storage in microcontroller-based systems.
For engineers reviewing the AT49F002AN-55TU datasheet, AT49F002AN-55TU pinout, AT49F002AN-55TU application, or AT49F002AN-55TU equivalent, key selection criteria include its single 5V supply operation, boot block write protection capability, DATA polling and toggle bit for program/erase status detection, and TSOP-32 green (Pb/halide-free) packaging compliant with industrial reliability requirements.
Technical Context
The AT49F002AN-55TU implements a sector-erasable Flash architecture with one 16K-byte boot block, two 8K-byte parameter blocks, and four main memory blocks (32K + 3×64K bytes). Its command-set-driven operation uses six-cycle sequences for chip/sector erase and boot lockout enable, with internal timing eliminating external clocks.
It features hardware data protection via VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line gating (OE low/CE high/WE high inhibits writes). The RESET pin is NC on this variant, disabling both reset functionality and boot block override - distinguishing it from non-"N" variants.
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 embedded systems |
| Read Access Time | 55 ns max - enables direct execution from flash (XIP) in 20 MHz+ bus systems without wait states |
| Byte Programming Time | 20 µs typical - allows rapid field updates of small firmware patches or calibration tables |
| Chip Erase Time | 4 seconds max - supports efficient full-image reprogramming during manufacturing or recovery |
| Endurance | 10,000 program/erase cycles - validated for long-term use in devices requiring infrequent but critical firmware updates |
| Power Dissipation | 30 mA active / 100 µA CMOS standby - reduces thermal load and extends battery life in always-on embedded controllers |
| Operating Voltage | 5.0 V ±10% - compatible with legacy 5V logic families and eliminates need for auxiliary voltage rails |
Pinout & Package
AT49F002AN-55TU is supplied in a 32-lead Plastic Thin Small Outline Package (TSOP, Type I, 8 × 20 mm), JEDEC MO-142 compliant. 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 | Bi-directional Data Bus | 8-bit parallel interface for read/write operations; supports DATA polling on I/O7 and toggle bit on I/O6 |
| CE | Chip Enable | Active-low chip select; must be low with OE low for read, high to enter standby (100 µA) |
| 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 during command sequences and byte programming |
| VCC | Power Supply | +5.0 V ±10% supply; powers core logic and I/O buffers; VCC sense prevents programming below 3.8 V |
| GND | Ground | Reference return for all signals and power; decoupling required within 10 mm of VCC pin |
| RESET | No Connect (NC) | Pin 9 is unconnected - disables reset functionality and boot block override (12V feature unavailable) |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | Enables permanent storage of secure bootloader code (16K bytes) while allowing field updates to application firmware in other sectors |
| DATA Polling & Toggle Bit | Allows real-time, software-driven detection of program/erase completion without polling timers or external hardware interrupts |
| Single 5V Supply Operation | Eliminates need for high-voltage programming supplies or charge pumps - simplifies PCB design and reduces BOM cost |
| Hardware Data Protection | VCC sense, noise filtering, and control-line gating prevent accidental writes during power transients or EMI events |
| Green (Pb/Halide-Free) Packaging | TSOP-32 package meets RoHS Directive 2011/65/EU and supports lead-free reflow soldering profiles |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast read access for deterministic boot and runtime instruction fetch. Use Value: 55 ns access time ensures zero-wait-state execution from flash; boot block lockout guarantees integrity of safety-critical startup routines. | Use Scenario: Holding certified bootloader and regulatory-compliant firmware in portable diagnostic equipment requiring field-upgradable software. IC Role / Device Role / Timing Role: Secure, tamper-resistant firmware repository with verified write protection for FDA/IEC 62304 compliance. Use Value: 16K-byte boot block lockout prevents unauthorized modification of certified startup code; 10,000-cycle endurance supports multi-year device lifecycle. |
| Automotive Body Control Module | Networking Equipment Configuration |
Use Scenario: Storing vehicle-specific calibration maps and CAN protocol stacks in body control units operating across −40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-temperature-rated Flash memory interfacing directly with 8-bit/16-bit MCUs via standard parallel bus. Use Value: 5V-only operation matches legacy automotive MCU I/O levels; 4-second chip erase enables rapid reprogramming during dealer service. | Use Scenario: Retaining VLAN tables, MAC addresses, and firmware patches in managed Ethernet switches and routers. IC Role / Device Role / Timing Role: Parameter and configuration storage with byte-level update capability for dynamic network provisioning. Use Value: Sector erase allows independent updating of configuration blocks without disturbing operational firmware; 20 µs/byte programming minimizes service interruption. |
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 | 48-pin SOIC vs. 32-pin TSOP; 5V-only but includes RESET pin and boot block override; 70 ns access time | Supports 12V RESET override for boot block reprogramming - suitable where field recovery of locked bootloader is required | Select if boot block override capability is mandatory; avoid if board space or pin count constraints favor 32-pin TSOP |
| SST39VF020-55-4C-NHE | 32-pin TSOP; 3.3V core with 5V tolerant I/O; 70 ns access; no dedicated boot block lockout (uses software protection) | Lacks hardware-enforced boot block write protection - relies on firmware-level security for bootloader integrity | Select for lower power or mixed-voltage systems; avoid when hardware-level boot code immutability is required per safety standards |
Compared with AM29LV002BT-55REI and SST39VF020-55-4C-NHE, the AT49F002AN-55TU provides stricter hardware boot block protection without RESET dependency, fits tighter board layouts via 32-pin TSOP, and delivers faster 55 ns read performance - making it optimal for space-constrained, safety-critical 5V embedded designs where bootloader integrity is enforced at silicon level.
Availability
AT49F002AN-55TU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloaders, automotive body control modules, and networking equipment configuration requiring stable component supply and long-term obsolescence management.
Supply support for AT49F002AN-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 semiconductor manufacturer specializing in microcontrollers, Flash memory, and secure authentication ICs for embedded systems.
The AT49F002A(N)(T) series was designed as a drop-in replacement for EPROMs in legacy 5V systems, delivering in-system reprogrammability without high-voltage programming - targeting industrial, medical, and automotive applications demanding reliable, pin-compatible Flash storage.
FAQ
What is the function of Pin 9 on the AT49F002AN-55TU?
Pin 9 on the AT49F002AN-55TU is designated as No Connect (NC) per the official Atmel datasheet (Section 2.2). Unlike non-"N" variants, this TSOP-packaged part does not implement the RESET function - meaning the pin is internally unconnected and must be left floating or tied to ground per PCB layout best practices. This eliminates boot block override capability via 12V on RESET.
Does the AT49F002AN-55TU support hardware boot block protection?
Yes, the AT49F002AN-55TU supports hardware-enforced boot block programming lockout for its 16K-byte boot sector (address range 3C000H–3FFFFH). Once enabled via the six-cycle command sequence, writes to this sector are blocked under standard 5V operation. Because Pin 9 (RESET) is NC, the 12V override feature is disabled - making protection irreversible in this variant.
What is the maximum erase time for a full chip erase on the AT49F002AN-55TU?
The maximum chip erase time for the AT49F002AN-55TU is 8 seconds (tEC), with a typical value of 4 seconds. This applies when the boot block lockout is disabled; if enabled, only parameter and main memory blocks are erased, but total time remains within the same 4–8 second specification per datasheet Section 17.
Can the AT49F002AN-55TU be used in place of an EPROM in existing designs?
Yes, the AT49F002AN-55TU is designed as a direct EPROM replacement: it uses identical CE/OE/WE control signaling, 5V-only operation, and standard parallel bus timing. Its 55 ns access time matches common 27Cxxx EPROMs, and the TSOP-32 footprint aligns with industry-standard sockets - enabling drop-in upgrades without PCB redesign.
Is the AT49F002AN-55TU RoHS compliant?
Yes, the AT49F002AN-55TU carries the "U" suffix denoting Atmel's Green (Pb/halide-free) packaging option. It complies with RoHS Directive 2011/65/EU and supports lead-free reflow soldering per J-STD-020D.2, with full material declarations available in Atmel's official product change notices.
AT49F002AN-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
AT49F002AN-55TU FAQ
1.How can I place an order for AT49F002AN-55TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002AN-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 AT49F002AN-55TU reliable?
The price and inventory of AT49F002AN-55TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002AN-55TU is usually 5 days.
3.What payment methods are accepted for AT49F002AN-55TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002AN-55TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002AN-55TU?
AT49F002AN-55TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002AN-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 AT49F002AN-55TU?
For technical support, including AT49F002AN-55TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002AN-55TU requirements.
6.How does Aetrix verify that AT49F002AN-55TU is sourced from the original manufacturer or authorized distributors?
All AT49F002AN-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 AT49F002AN-55TU meets industry standards.
7.What is the process for return or replacement of AT49F002AN-55TU?
All AT49F002AN-55TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002AN-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 AT49F002AN-55TU part is unused and in its original packaging.
Return procedure for AT49F002AN-55TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F002AN-55TU Tags
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