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Microchip Technology AT49F002-90PC
- Part No.:
- AT49F002-90PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F002-90PC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,381
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Product details
Overview
AT49F002-90PC from Atmel is a 5V-only, 2 Mbit (256K × 8) in-system reprogrammable Flash memory IC with 90 ns read access time, 10 µs/byte typical programming time, and sector-based architecture including a 16K-byte boot block with programmable lockout. It operates across commercial temperature range (0°C to 70°C) and is used for firmware storage and boot code retention in embedded microcontroller systems.
For engineers reviewing the AT49F002-90PC datasheet, AT49F002-90PC pinout, AT49F002-90PC application, or AT49F002-90PC equivalent, key selection considerations include its 5V-only operation, boot block protection capability, sector erase flexibility, and compatibility with standard EPROM-style bus interface timing.
Technical Context
The AT49F002-90PC implements a command-based Flash architecture with internal program control logic and hardware data protection, supporting chip erase (10 s), sector erase, and byte-by-byte programming. Its memory is partitioned into one 16K-byte boot block, two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes).
It uses standard CE/OE/WE control signals and supports DATA polling and toggle-bit methods for end-of-program detection. The RESET pin enables system-level reset and - when driven to 12 V - overrides boot block lockout, a feature absent in N(T) 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 | 90 ns - defines maximum clock-to-data delay in microprocessor bus reads |
| Byte Programming Time | 10 µs typical - determines minimum write cycle duration per byte |
| Erase Cycle Time | 10 seconds - full-chip or sector erase duration under internal timing control |
| Operating Voltage | 5 V ±10% - single-supply operation eliminates need for high-voltage programming circuitry |
| Endurance | 10,000 program/erase cycles - guaranteed write-cycle lifetime before parametric degradation |
| Standby Current | 100 µA CMOS - enables low-power retention during system sleep modes |
Pinout & Package
AT49F002-90PC is packaged in a 32-pin, 0.600" wide plastic dual inline package (PDIP), pin-compatible with industry-standard EPROM footprints and socketable for development and field updates.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing space |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus compatible with 8-bit microcontrollers and bus controllers |
| CE | Chip Enable | Active-low chip select enabling memory access only when asserted |
| OE | Output Enable | Active-low output gate controlling data bus drive during read operations |
| WE | Write Enable | Active-low signal initiating byte programming or command latching sequences |
| RESET | Reset Input | Active-low reset halts operations and forces high-impedance outputs; 12 V input enables boot block override |
| GND / VCC | Power Supply | Ground reference and 5 V supply pins - decoupling required per JEDEC layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V supply operation | Eliminates need for external +12 V programming voltage, simplifying power design and board layout |
| Boot block programming lockout | 16K-byte protected region prevents accidental overwrite of critical boot code while allowing field updates to application sectors |
| Hardware data protection | VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line gating prevent spurious writes |
| DATA polling & toggle-bit detection | Enables software-driven end-of-program verification without external timers or status registers |
| Sector architecture | Independent erasure of parameter blocks (8K × 2) and main memory blocks (96K/128K) minimizes update latency and wear leveling overhead |
Applications
| Industrial PLC Firmware Storage | Embedded Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers subject to frequent field updates. IC Role / Device Role / Timing Role: Nonvolatile storage for executable code and runtime variables; accessed via parallel bus during cold start and runtime reconfiguration. Use Value: Sector erase allows selective update of application firmware without disturbing I/O mapping tables stored in parameter blocks. | Use Scenario: Hosting secure boot code that initializes CPU, memory controller, and peripheral drivers before loading OS or application. IC Role / Device Role / Timing Role: Boot block serves as trusted execution root; locked after initial programming to ensure integrity across power cycles. Use Value: 16K-byte boot block with hardware lockout guarantees boot code persistence even during full-application reflash operations. |
| Medical Device Configuration Memory | Telecom Line Card Parameter Storage |
Use Scenario: Retaining calibration data, device serial numbers, and safety-critical settings in FDA-regulated diagnostic equipment. IC Role / Device Role / Timing Role: Parameter block storage accessed during self-test and initialization; write-protected post-calibration. Use Value: Two independent 8K-byte parameter blocks enable A/B versioning and rollback capability without requiring external EEPROM. | Use Scenario: Storing DSP coefficients, line provisioning profiles, and firmware patches on carrier-grade DSLAM line cards. IC Role / Device Role / Timing Role: Main memory block used for field-upgradable firmware; accessed over shared processor bus during maintenance windows. Use Value: 90 ns read access ensures minimal impact on real-time packet processing latency during firmware validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F002N-90PC | No RESET pin functionality; boot block lockout override via 12 V not supported | Not suitable where hardware reset coordination or emergency boot block reprogramming is required | Select when RESET pin is unused and simplified qualification is preferred |
| AT49F002T-90PC | Boot block relocated to upper address range (3C000–3FFFFH); different sector address mapping | Requires firmware address remapping; incompatible with legacy AT49F002(N) boot loader binaries | Select only when migrating to new board design with updated memory map and bootloader |
Compared with AT49F002N-90PC and AT49F002T-90PC, the AT49F002-90PC provides full RESET functionality including 12 V override, and retains the original lower-address boot block (00000–03FFFH), making it the most direct replacement for legacy AT49F002 designs requiring field-safe boot code updates.
Availability
AT49F002-90PC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded bootloader memory, medical device configuration memory, and telecom line card parameter storage requiring stable component supply and long-term obsolescence management.
Supply support for AT49F002-90PC 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 was a U.S.-based semiconductor manufacturer specializing in microcontrollers, Flash memory, and mixed-signal ICs, later acquired by Microchip Technology in 2016.
The AT49F002 product line delivers 5V-only, in-system reprogrammable Flash memory optimized for embedded systems requiring reliable firmware storage, boot code integrity, and field-upgrade capability without high-voltage programming infrastructure.
FAQ
What is the memory organization of the AT49F002-90PC?
The AT49F002-90PC contains 2 Mbit (262,144 × 8) of Flash memory organized as 256K words × 8 bits. Its physical address space spans 00000H to 3FFFFH, partitioned into one 16K-byte boot block, two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). This structure is fixed for the AT49F002-90PC variant and matches the base AT49F002 family specification.
Does the AT49F002-90PC support boot block lockout override?
Yes, the AT49F002-90PC supports boot block lockout override via the RESET pin: applying 12.0 V ± 0.5 V to RESET enables chip erase, sector erase, or byte programming of the locked boot block. This feature is explicitly documented for the AT49F002-90PC and distinguishes it from AT49F002N-90PC, which lacks RESET-based override capability.
What package type is used for the AT49F002-90PC?
The AT49F002-90PC uses a 32-pin, 0.600" wide plastic dual inline package (PDIP), designated as package code "32P6" in Atmel's ordering information. This through-hole package supports socket-based programming and prototyping, and is pin-compatible with standard EPROM sockets used in legacy embedded systems.
How does the AT49F002-90PC detect end-of-program completion?
The AT49F002-90PC supports two hardware-assisted methods: DATA polling (reading the programmed byte returns complemented data on I/O7 until completion) and toggle-bit detection (I/O6 toggles during programming/erasing and stabilizes upon completion). Both methods eliminate need for fixed delay loops and are fully functional in the AT49F002-90PC without external components.
Is the AT49F002-90PC compatible with standard EPROM timing interfaces?
Yes, the AT49F002-90PC uses identical CE/OE/WE control signaling and timing conventions as standard EPROMs, including dual-line output enable (OE + CE) to prevent bus contention. Its 90 ns read access time and TTL/CMOS-compatible input thresholds ensure drop-in replacement in existing EPROM-based designs without timing or logic-level redesign.
AT49F002-90PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- 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:
- 90 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49F002-90PC FAQ
1.How can I place an order for AT49F002-90PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002-90PC 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 AT49F002-90PC reliable?
The price and inventory of AT49F002-90PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002-90PC is usually 5 days.
3.What payment methods are accepted for AT49F002-90PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002-90PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002-90PC?
AT49F002-90PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002-90PC 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 AT49F002-90PC?
For technical support, including AT49F002-90PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002-90PC requirements.
6.How does Aetrix verify that AT49F002-90PC is sourced from the original manufacturer or authorized distributors?
All AT49F002-90PC 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 AT49F002-90PC meets industry standards.
7.What is the process for return or replacement of AT49F002-90PC?
All AT49F002-90PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002-90PC, 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 AT49F002-90PC part is unused and in its original packaging.
Return procedure for AT49F002-90PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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