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Microchip Technology AT49F002-12TI
- Part No.:
- AT49F002-12TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F002-12TI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,066
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Product details
Overview
AT49F002-12TI from Atmel is a 2-Mbit (256K × 8) 5V-only in-system reprogrammable Flash memory IC used for nonvolatile code/data storage in embedded controllers and boot firmware applications. It delivers 55 ns read access time, 10 µs/byte typical programming, 10-second chip erase, 10,000 write cycles, and hardware data protection with CMOS standby current of 100 µA.
For engineers reviewing the AT49F002-12TI datasheet, AT49F002-12TI pinout, AT49F002-12TI application, or AT49F002-12TI equivalent, this page provides verified technical context, sector architecture details, boot block lockout behavior, DATA polling implementation, and industrial-grade (-40°C to +85°C) TSOP packaging specifications.
Technical Context
The AT49F002-12TI implements a sector-organized Flash architecture with one 16K-byte boot block (address range 3C000H–3FFFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). Its command interface uses standard microprocessor timing with WE/CE/OE control and supports software-based chip/sector erase and byte programming via six-cycle command sequences.
It features dual end-of-operation detection: DATA polling (I/O7 complement toggle) and Toggle Bit (I/O6 toggling during program/erase). The RESET pin enables system-level reset and - when driven to 12V ±0.5V - overrides boot block lockout, a capability absent in N-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits |
| Read Access Time | 120 ns max - defines minimum bus cycle time for reliable read operations |
| Byte Programming Time | 10 µs typical - enables rapid field updates without external timing circuitry |
| Chip Erase Time | 10 seconds - fixed internal timer eliminates need for external erase supervision |
| Endurance | 10,000 program/erase cycles - specifies guaranteed rewrite lifetime before wear-out |
| Operating Voltage | 5.0 V ±10% - single-supply operation compatible with legacy 5V logic systems |
| Temperature Range | -40°C to +85°C - qualified for industrial environments with no derating |
| Standby Current | 100 µA CMOS - enables low-power retention in battery-backed or sleep-mode systems |
Pinout & Package
AT49F002-12TI is supplied in a 32-lead Plastic Thin Small Outline Package (TSOP, 8 × 20 mm), pin-compatible with industry-standard 32-pin Flash memory footprints. Pin 9 is a no-connect (NC) per datasheet specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing (A0–A17) |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read/write data transfer; high-impedance when deselected |
| 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 control for programming/erase command latching and data strobing |
| RESET | Reset Input | Active-low system reset; 12V override enables boot block reprogramming when locked |
| VCC / GND | Power Supply | 5V core supply and ground reference; decoupling required within 1 cm of pins |
| DC (Pin 9) | No-Connect | Internally unconnected; must remain floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 16K-byte protected region (3C000H–3FFFFH) prevents accidental overwrite of critical boot code |
| Hardware Data Protection | VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock (OE low/CE high/WE high blocks writes) |
| DATA Polling & Toggle Bit | Two independent, software-accessible status mechanisms eliminate need for fixed delay timers in host firmware |
| Sector Erase Flexibility | Independent erasure of parameter blocks (8K each) and main memory blocks (96K/128K) enables modular firmware updates |
| Single 5V Supply | Eliminates requirement for 12V programming voltage or charge pumps - simplifies power design and PCB layout |
Applications
| Embedded Boot Memory | Firmware Update Storage |
|---|---|
Use Scenario: Storing boot loader and initialization code in microcontroller-based industrial PLCs requiring cold-start reliability. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped at reset vector; accessed during power-on sequence with strict tACC ≤120 ns timing. Use Value: Boot block lockout ensures firmware integrity across 10,000+ field updates; 100 µA standby current extends battery life in maintenance-free deployments. | Use Scenario: Field-upgradable parameter tables and calibration data in medical diagnostic equipment. IC Role / Device Role / Timing Role: Parameter block (8K × 2) stores user-configurable settings; erased/reprogrammed independently without affecting main application code. Use Value: Sector architecture enables atomic updates - no risk of partial corruption during power loss; DATA polling confirms completion before host proceeds. |
| Industrial HMI Firmware | Legacy System Code Replacement |
Use Scenario: Replacing EPROMs in aging human-machine interface panels with field-reprogrammable Flash. IC Role / Device Role / Timing Role: Drop-in replacement for 27C256 EPROM; identical 32-pin TSOP footprint and CE/OE/WE control interface. Use Value: 55 ns read speed meets original EPROM timing; 5V-only operation avoids redesign of existing 5V power rails and level-shifting circuits. | Use Scenario: Upgrading firmware in telecom line cards where board space and thermal budget constrain component selection. IC Role / Device Role / Timing Role: Main memory block (128K-byte) holds application firmware; programmed via JTAG-adjacent ISP interface using standard WE/CE strobes. Use Value: 10-second chip erase reduces downtime during firmware rollouts; industrial temperature rating ensures reliability in enclosed chassis with ambient >70°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV002BT-120EC | 3V/5V dual-voltage operation; 120 ns access; 16K boot sector at top address (0x00000) | Requires voltage translation in pure 5V systems; boot sector location differs - may require linker script changes | Select if migrating to lower-voltage systems or needing extended endurance beyond 10k cycles |
| SST39VF020-120-4C-NHE | 5V-only; 120 ns access; 8K boot sector; no RESET pin or 12V override capability | Lacks boot block lockout override - irreversible lock once enabled; no hardware reset coordination | Select for cost-sensitive designs where boot block override is unnecessary and smaller boot sector suffices |
Compared with AM29LV002BT-120EC and SST39VF020-120-4C-NHE, the AT49F002-12TI uniquely combines industrial temperature support, 12V RESET override for boot recovery, and a 16K top-address boot block - enabling secure, field-serviceable firmware architectures without voltage translation or external supervision logic.
Availability
AT49F002-12TI is available at Aetrix Electronics and suitable for industrial HMI firmware, embedded boot memory, and legacy system code replacement requiring stable component supply, long-term lifecycle assurance, and TSOP-32 package compatibility.
Supply support for AT49F002-12TI 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 devices.
The AT49F002 series was designed for in-system reprogrammable nonvolatile storage in 5V embedded systems, emphasizing boot code security, sector-level flexibility, and industrial environmental robustness.
FAQ
What is the boot block address range for AT49F002-12TI?
The AT49F002-12TI boot block occupies addresses 3C000H to 3FFFFH (16K bytes) - located at the top of the memory map. This differs from the AT49F002(N) variant, which places the boot block at 00000H–03FFFH. The AT49F002-12TI's top-aligned boot sector simplifies reset vector mapping in most 8051 and Z80-based designs.
Does AT49F002-12TI support 12V programming voltage?
No, the AT49F002-12TI operates exclusively at 5V for both read and programming functions. However, its RESET pin accepts a 12V ±0.5V signal solely to override boot block lockout - not for programming. All command execution, including byte programming and sector erase, occurs at 5V only.
How does DATA polling work on AT49F002-12TI?
During byte programming, reading the last loaded address returns the complement of the written data on I/O7. When programming completes, true data appears on all I/O lines. This allows host firmware to poll without fixed delays - the AT49F002-12TI internally manages timing, eliminating need for external wait-state generators.
Is AT49F002-12TI pin-compatible with standard 27C256 EPROMs?
Yes, the AT49F002-12TI in TSOP-32 (32T) package matches the pinout and functional interface of 27C256 EPROMs, including identical CE, OE, and WE control signals and 8-bit bidirectional data bus. No PCB redesign is needed for drop-in replacement, though firmware must implement Flash-specific command sequences instead of EPROM write protocols.
What is the meaning of the "-12" suffix in AT49F002-12TI?
The "-12" suffix in AT49F002-12TI indicates a maximum read access time of 120 ns (tACC). It denotes the speed grade - slower than -55 (55 ns), -70 (70 ns), or -90 (90 ns) variants - optimized for cost-sensitive industrial applications where timing margins allow relaxed access timing.
AT49F002-12TI 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:
- 120 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
AT49F002-12TI FAQ
1.How can I place an order for AT49F002-12TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002-12TI 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 AT49F002-12TI reliable?
The price and inventory of AT49F002-12TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002-12TI is usually 5 days.
3.What payment methods are accepted for AT49F002-12TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002-12TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002-12TI?
AT49F002-12TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002-12TI 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 AT49F002-12TI?
For technical support, including AT49F002-12TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002-12TI requirements.
6.How does Aetrix verify that AT49F002-12TI is sourced from the original manufacturer or authorized distributors?
All AT49F002-12TI 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 AT49F002-12TI meets industry standards.
7.What is the process for return or replacement of AT49F002-12TI?
All AT49F002-12TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002-12TI, 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 AT49F002-12TI part is unused and in its original packaging.
Return procedure for AT49F002-12TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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