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Microchip Technology AT49F002-12TC
- Part No.:
- AT49F002-12TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F002-12TC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,143
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Product details
Overview
AT49F002-12TC from Atmel is a 5V-only, 2 Mbit (256K × 8) in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It features 55 ns read access time, 10 µs/byte programming, 10-second chip erase, sector-based architecture (16K boot block + two 8K parameter blocks + two main memory blocks), and hardware data protection with RESET pin override capability.
For engineers reviewing the AT49F002-12TC datasheet, AT49F002-12TC pinout, AT49F002-12TC application, or AT49F002-12TC equivalent, this page delivers verified specifications, package mapping to 32-lead TSOP (8 × 20 mm), boot-block lockout behavior, DATA polling/toggle-bit status detection, and real-world use cases in firmware update and secure boot subsystems.
Technical Context
The AT49F002-12TC implements a command-register-based Flash architecture with software-controlled sector erase and byte programming. Its control logic interprets six-cycle command sequences (e.g., 5555h/AAh → 2AAAh/55h → 5555h/80h) to initiate chip/sector erase or boot-lock enable, eliminating need for external high-voltage programming circuitry.
It supports standard EPROM-like read timing with CE/OE/WE dual-line control, includes VCC sense (inhibit below 3.8 V), noise filtering on WE/CE (<15 ns pulses ignored), and hardware RESET-driven boot-block reprogramming at 12 V - a feature absent in N-suffix variants but confirmed for AT49F002T family including AT49F002-12TC.
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 duration for reliable read operations |
| Byte Programming Time | 10 µs typical - enables fast field updates without system stall |
| Chip Erase Time | 10 seconds - deterministic internal timing eliminates external clock dependency |
| End-of-Program Detection | DATA polling (I/O7 complement) or toggle-bit (I/O6 toggling) - allows asynchronous host polling without fixed delays |
| Boot Block Protection | 16K-byte sector (3C000h–3FFFFh) with lockout enabled via 6-cycle command; override possible only with 12 V on RESET pin |
| Power Dissipation | 50 mA active current / 100 µA CMOS standby - suitable for low-power embedded operation |
Pinout & Package
AT49F002-12TC uses a 32-lead Plastic Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm). Pin 1 is located at top-left corner (index mark), with pin 9 designated as "Don't Connect" per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing space |
| 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 gate; controls data bus drive during read; high = high-Z |
| WE | Write Enable | Active-low write strobe; latches address/data during command and programming cycles |
| RESET | Reset Control | Active-low reset; halts ongoing operations and forces outputs to high-Z; 12 V input enables boot-block override |
| VCC | Power Supply | +5 V ±10% supply; powers core logic and I/O buffers |
| GND | Ground | Reference ground for all signals and power domains |
| DC (Pin 9) | No Connect | Internally unconnected; must remain floating or tied to GND per design guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | Enables selective erasure of boot (16K), parameter (2×8K), and main memory (96K+128K) blocks - critical for modular firmware updates |
| Hardware Boot Lockout | Immutable 16K boot sector (3C000h–3FFFFh) prevents accidental overwrite of bootloader code unless 12 V applied to RESET |
| Single 5V Operation | Eliminates need for +12 V or +25 V programming supplies - simplifies PCB layout and power design |
| DATA Polling & Toggle Bit | Provides two independent, software-accessible methods to detect program/erase completion - improves host CPU efficiency |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibit prevent spurious writes - enhances field reliability in noisy environments |
Applications
| Embedded Firmware Storage | Secure Bootloader Memory |
|---|---|
Use Scenario: Storing application firmware in microcontroller-based industrial controllers where field updates are required without removing the device. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; operates as memory-mapped peripheral using standard CE/OE/WE timing. Use Value: Enables over-the-air or USB-based firmware upgrades while preserving boot integrity via protected 16K sector. | Use Scenario: Hosting immutable bootloader code in medical diagnostic equipment requiring regulatory-compliant boot validation. IC Role / Device Role / Timing Role: Secure boot memory with hardware-enforced write protection; accessed early in power-on sequence before main application loads. Use Value: Prevents unauthorized modification of boot code; 12 V RESET override allows controlled recovery during service procedures. |
| Parameter Configuration Storage | Legacy System Code Replacement |
Use Scenario: Retaining calibration data and user settings across power cycles in test-and-measurement instruments. IC Role / Device Role / Timing Role: Parameter block (8K × 2) used for persistent configuration storage; erased/reprogrammed independently of main firmware. Use Value: Isolates volatile settings from firmware updates - avoids loss of calibrated values during field upgrades. | Use Scenario: Replacing obsolete EPROMs (e.g., 27C256) in legacy telecom line cards without board redesign. IC Role / Device Role / Timing Role: Pin-compatible Flash replacement with identical 32-pin TSOP footprint and EPROM-style read protocol. Use Value: Maintains existing timing margins (120 ns access) and control signal behavior - zero hardware changes required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F002T-12TC | Identical pinout, timing, and sector map; same 3C000h–3FFFFh boot block address; differs only in ordering suffix - AT49F002-12TC is functionally equivalent to AT49F002T-12TC per Atmel documentation. | Same use cases: secure boot, firmware storage, parameter retention. | Select AT49F002-12TC when sourcing from distributors listing this exact part number; no functional distinction from AT49F002T-12TC. |
| MX29F002TC-12 | 120 ns access, 2 Mbit, 32-pin TSOP; lacks 12 V RESET override and boot lockout override - boot protection is permanent once enabled. | Acceptable for non-recovery-critical boot storage; unsuitable where field service requires boot reprogramming. | Choose MX29F002TC-12 only if boot block override is unnecessary and cost sensitivity outweighs Atmel-specific features. |
Compared with AT49F002T-12TC, the AT49F002-12TC is functionally identical; compared with MX29F002TC-12, it provides unique 12 V–enabled boot recovery - a decisive advantage in serviceable embedded systems.
Availability
AT49F002-12TC is available at Aetrix Electronics and suitable for industrial control firmware storage, secure bootloader implementation, and legacy EPROM replacement requiring stable component supply and long-term obsolescence management.
Supply support for AT49F002-12TC 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 family was designed for embedded systems requiring reliable, in-system reprogrammable nonvolatile memory with hardware-level boot protection and single-supply simplicity.
FAQ
What is the boot block address range for AT49F002-12TC?
The boot block for AT49F002-12TC occupies addresses 3C000h to 3FFFFh (16K bytes), consistent with the AT49F002T variant. This differs from the AT49F002(N) version, which uses 00000h–03FFFh. The address range is fixed and cannot be remapped in AT49F002-12TC.
Does AT49F002-12TC support 12 V programming on the RESET pin?
Yes, AT49F002-12TC supports 12 V ± 0.5 V applied to the RESET pin to override boot block lockout - enabling chip erase, sector erase, or byte programming of the protected 16K sector. This feature is explicitly documented for AT49F002(N)T variants and confirmed for AT49F002-12TC in the Ordering Information table and RESET section.
What is the maximum operating temperature range for AT49F002-12TC?
AT49F002-12TC is rated for industrial temperature operation from –40°C to +85°C, as indicated by the "-12" speed grade and "I" suffix in related ordering codes (e.g., AT49F002-12TI). The -12TC package variant itself carries the industrial range per Atmel's standardized suffix convention.
Can AT49F002-12TC be used as a direct replacement for AT29C020?
No, AT49F002-12TC is not a direct replacement for AT29C020. While both are 2 Mbit Flash devices, AT29C020 uses a 32-pin PLCC or PDIP package with different pinout, lacks RESET pin functionality, and has distinct command sequences and sector architecture. AT49F002-12TC requires matching TSOP footprint and RESET handling.
How does DATA polling work on AT49F002-12TC during byte programming?
During byte programming, reading the programmed address returns the complement of the loaded data on I/O7 until completion; once finished, true data appears on all I/O lines. This allows the host processor to poll I/O7 without fixed delays - a key efficiency feature confirmed in the AT49F002-12TC datasheet's Data Polling Waveforms section.
AT49F002-12TC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT49F002-12TC FAQ
1.How can I place an order for AT49F002-12TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002-12TC 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 AT49F002-12TC reliable?
The price and inventory of AT49F002-12TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002-12TC is usually 5 days.
3.What payment methods are accepted for AT49F002-12TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002-12TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002-12TC?
AT49F002-12TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002-12TC 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 AT49F002-12TC?
For technical support, including AT49F002-12TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002-12TC requirements.
6.How does Aetrix verify that AT49F002-12TC is sourced from the original manufacturer or authorized distributors?
All AT49F002-12TC 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 AT49F002-12TC meets industry standards.
7.What is the process for return or replacement of AT49F002-12TC?
All AT49F002-12TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002-12TC, 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 AT49F002-12TC part is unused and in its original packaging.
Return procedure for AT49F002-12TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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