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Microchip Technology AT49F002AN-55TI
- Part No.:
- AT49F002AN-55TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F002AN-55TI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,377
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Product details
Overview
AT49F002AN-55TI from Atmel is a 5V-only, 2 Mbit (256K × 8) in-system reprogrammable Flash memory with 55 ns read access time, 20 µs/byte programming, 4-second chip erase, and sector architecture comprising 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 status detection and is used in embedded firmware storage for industrial microcontroller systems requiring field-upgradable code.
For engineers reviewing the AT49F002AN-55TI datasheet, AT49F002AN-55TI pinout, AT49F002AN-55TI application, or AT49F002AN-55TI equivalent, key selection criteria include boot-block lockout capability, 5V-only operation without high-voltage programming, CMOS standby current of 100 µA, and TSOP-32 packaging compatibility with legacy 8-bit bus interfaces.
Technical Context
The AT49F002AN-55TI implements a command-based Flash architecture using standard CE/OE/WE control logic identical to EPROMs, enabling drop-in replacement in existing 8-bit memory buses. Its internal program controller manages byte programming and sector erasure without external timing circuits, and hardware data protection includes VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and write-inhibit via OE/CE/WE states.
Boot block lockout is software-enabled via a six-cycle command sequence and permanently protects the 16K-byte boot sector (address range 3C000H–3FFFFH for the -T variant); once activated, reprogramming requires 12 V on RESET - a feature explicitly disabled in the AT49F002AN-55TI per datasheet Section 4.3 and Note 6.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), directly maps to 256 KB address space for firmware image storage |
| Read Access Time | 55 ns - enables direct execution from Flash (XIP) in 5 MHz bus systems without wait states |
| Byte Programming Time | 20 µs typical - allows <50 KB/s firmware update rate under sustained write conditions |
| Chip Erase Time | 4 seconds max - supports full-field firmware recovery within deterministic maintenance windows |
| Endurance | 10,000 program/erase cycles - qualifies for >5 years of daily field updates in industrial controllers |
| Standby Current | 100 µA CMOS - meets low-power requirements for battery-backed or energy-harvested edge nodes |
| Operating Voltage | 5.0 V ±10% - eliminates need for auxiliary voltage rails in legacy 5V system designs |
Pinout & Package
AT49F002AN-55TI uses a 32-lead Plastic Thin Small Outline Package (TSOP, Type I, 8 × 20 mm), JEDEC MO-142 BD compliant. Pin 9 is no-connect (NC) per datasheet Section 2.2 and Note *.
| 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 | Bi-directional 8-bit 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 for read, high to enter standby (100 µA) |
| OE | Output Enable | Active-low output gate; controls bus contention avoidance during read operations |
| 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-Z outputs; 12 V override disabled in AT49F002AN-55TI |
| VCC | Power Supply | +5.0 V ±10% supply; internal VCC sense disables programming if voltage drops below 3.8 V |
| GND | Ground | Reference for all I/O and power pins; decoupling required within 10 mm of VCC pin |
| Pin 9 | No Connect | Physically present but unconnected die bond pad; must be left floating or tied to GND (not VCC) |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | Enables secure bootloader storage (16K-byte block at 3C000H–3FFFFH) that survives field updates to application code in other sectors |
| 5V-Only Reprogrammability | Eliminates need for 12 V programming supplies or charge pumps, simplifying PCB layout and power design |
| DATA Polling & Toggle Bit | Allows real-time status monitoring during programming/erase without dedicated status registers or external clocks |
| Hardware Data Protection | Prevents accidental writes via VCC sensing, noise filtering, and multi-signal inhibit (OE high / CE high / WE high) |
| Green Pb/Halide-Free Packaging | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 2 moisture sensitivity (MSL 3) |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System BIOS |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in -40°C to +85°C environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; 55 ns read latency supports real-time scan cycle execution. Use Value: Enables remote firmware patches without hardware replacement; boot block lockout prevents corruption of safety-critical startup routines. | Use Scenario: Holding initialization code and hardware abstraction layer for 8051- or Z80-based industrial HMIs with no external programmer interface. IC Role / Device Role / Timing Role: Standalone EPROM-replacement Flash memory mapped to CPU address space; CE/OE/WE timing compatible with legacy bus controllers. Use Value: Reduces BOM count by eliminating UV-erasable EPROM sockets; 100 µA standby current extends backup battery life in unpowered states. |
| Medical Device Configuration Memory | Automotive Body Control Module Code |
Use Scenario: Storing calibration tables and device-specific configuration parameters in portable diagnostic equipment certified to IEC 60601-1. IC Role / Device Role / Timing Role: Parameter block (8K × 2) storage with independent sector erase; immune to ESD events per IEC 61000-4-2 Level 4. Use Value: Allows field recalibration without full firmware reload; hardware write protection prevents unintended parameter changes during power transients. | Use Scenario: Hosting low-level CAN protocol stack and sensor driver code in automotive BCMs subjected to ISO 16750-2 load dump pulses. IC Role / Device Role / Timing Role: Main memory block (32K + 3×64K) storage with 4-second chip erase for fail-safe recovery after corrupted flash writes. Use Value: Supports ASAM MCD-2 MC-compliant flashing tools; 10,000-cycle endurance exceeds OEM 15-year vehicle lifetime requirements. |
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 package; 55 ns access; requires 12 V for reset override; no NC pin at position 9 | Designed for wider 16-bit data buses; lacks TSOP-32 footprint compatibility | Select only if board redesign accommodates larger package and 12 V reset circuitry |
| SST39VF020-55-4C-NHE | 32-pin TSOP; 55 ns access; 100 µA standby; boot block at 00000H–03FFFH (not mirrored) | Boot sector location differs - incompatible with AT49F002AN-55TI's 3C000H–3FFFFH mapping | Use only when firmware linker script can relocate boot code to lower 16K address range |
Compared with AM29LV002BT-55REI and SST39VF020-55-4C-NHE, the AT49F002AN-55TI offers native TSOP-32 pinout alignment, fixed 3C000H boot sector for upward-compatible firmware partitioning, and guaranteed 5V-only operation without reset-voltage dependencies - critical for drop-in replacements in space-constrained industrial PCBs.
Availability
AT49F002AN-55TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system BIOS, medical device configuration memory, and automotive body control module code requiring stable component supply across extended temperature ranges.
Supply support for AT49F002AN-55TI 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 for industrial, automotive, and consumer applications.
The AT49F002A(N)(T) product line delivers 5V-only Flash memory optimized for in-system reprogrammability in legacy 8-bit embedded systems where EPROM sockets are being replaced with field-upgradable solutions.
FAQ
What is the boot block address range for AT49F002AN-55TI?
The boot block address range for AT49F002AN-55TI is 3C000H to 3FFFFH (16K bytes), as confirmed in Section 4.6 and Note 3 of the datasheet. This differs from the base AT49F002A(N) variant, which uses 00000H–03FFFH. The AT49F002AN-55TI's upper-address boot sector enables separation of bootloader and application code in contiguous high-memory regions.
Does AT49F002AN-55TI support 12 V reset override for boot block reprogramming?
No, AT49F002AN-55TI does not support 12 V reset override. Section 4.3 explicitly states "The RESET feature is not available for the AT49F002AN(T)", and Note 6 confirms the RESET pin is not functional for boot block unlock. Therefore, once boot block lockout is enabled on AT49F002AN-55TI, the protected region cannot be reprogrammed under any voltage condition.
What is the function of Pin 9 on AT49F002AN-55TI?
Pin 9 on AT49F002AN-55TI is a no-connect (NC) terminal, as documented in Section 2.2 ("VSOP or TSOP Top View") and Note * of the datasheet. It must remain unconnected or tied to GND - connecting it to VCC or driving it may cause undefined behavior. This NC designation applies specifically to the AT49F002AN(T) variants, distinguishing them from non-N versions.
How does DATA polling work on AT49F002AN-55TI during byte programming?
During byte programming, reading the programmed address returns the complement of the loaded data on I/O7 until completion; once valid, true data appears on all I/O lines. This allows host firmware to poll I/O7 without halting the CPU - a method validated in Section 4.8 and Figure 21. The AT49F002AN-55TI requires no additional status registers or clock signals to implement this handshake.
Is AT49F002AN-55TI RoHS-compliant and what is its moisture sensitivity level?
Yes, AT49F002AN-55TI is RoHS-compliant with Pb/halide-free packaging (Section 27.2). Its TSOP-32 package meets JEDEC J-STD-020D MSL Level 3, requiring floor life of 168 hours at ≤30°C/60% RH and bake conditioning per IPC/JEDEC J-STD-033 before reflow. This is confirmed by Atmel's green packaging option documentation and package drawings.
AT49F002AN-55TI 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-55TI FAQ
1.How can I place an order for AT49F002AN-55TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002AN-55TI 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-55TI reliable?
The price and inventory of AT49F002AN-55TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002AN-55TI is usually 5 days.
3.What payment methods are accepted for AT49F002AN-55TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002AN-55TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002AN-55TI?
AT49F002AN-55TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002AN-55TI 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-55TI?
For technical support, including AT49F002AN-55TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002AN-55TI requirements.
6.How does Aetrix verify that AT49F002AN-55TI is sourced from the original manufacturer or authorized distributors?
All AT49F002AN-55TI 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-55TI meets industry standards.
7.What is the process for return or replacement of AT49F002AN-55TI?
All AT49F002AN-55TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002AN-55TI, 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-55TI part is unused and in its original packaging.
Return procedure for AT49F002AN-55TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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