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Microchip Technology AT49F002N-90PC
- Part No.:
- AT49F002N-90PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F002N-90PC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,050
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Product details
Overview
AT49F002N-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 programming, 10-second erase cycle, and sector-based architecture including a 16K-byte boot block with programmable lockout. It serves as nonvolatile program storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the AT49F002N-90PC datasheet, AT49F002N-90PC pinout, AT49F002N-90PC application, or AT49F002N-90PC equivalent, key selection criteria include boot-block protection capability, 5V-only operation without high-voltage programming, CMOS standby current of 100 µA, sector erase flexibility, and compatibility with standard EPROM-like bus interface timing.
Technical Context
The AT49F002N-90PC implements a command-driven Flash architecture with internal state machine control for erase and program operations. It supports software-controlled chip erase (6-byte sequence), sector erase (targeting 8K parameter blocks or 96K/128K main memory blocks), and byte-by-byte programming using standard microprocessor write cycles.
Its memory map is partitioned into five distinct sectors: one 16K-byte boot block (00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). The RESET pin enables hardware reset and - on non-N(T) variants - 12V override of boot-block lockout, though this feature is explicitly disabled for AT49F002N-90PC per documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - sufficient for full firmware images in 8-bit/16-bit MCU systems. |
| Read Access Time | 90 ns maximum - meets timing requirements for 11 MHz bus interfaces without wait states. |
| Byte Programming Time | 10 µs typical - enables rapid field updates of small configuration or calibration data segments. |
| Erase Cycle Time | 10 seconds max for full chip or sector - deterministic timing allows predictable firmware update windows. |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Power Dissipation | 50 mA active current / 100 µA CMOS standby - suitable for low-power embedded systems with sleep modes. |
| Endurance | 10,000 write/erase cycles - supports long-term field maintenance of infrequently updated code or data. |
Pinout & Package
AT49F002N-90PC is supplied in a 32-pin, 0.600" wide plastic dual inline package (PDIP), designated as package code 32P6. Pin 1 is index-marked; pin 9 is a no-connect (NC) terminal per device specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A16 used for byte-level access within 2 Mbit space. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path for read, program, and identification operations; high-impedance when CE or OE inactive. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; controls device selection on shared bus. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during read; high disables outputs to high-Z. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming cycles. |
| RESET | Hardware Reset | Active-low input that forces outputs to high-Z and halts ongoing operations; not functional for boot-block override on AT49F002N-90PC. |
| VCC | Power Supply | +5.0 V ±10% supply; powers core logic and memory array; internal voltage sensing inhibits programming if below 3.8 V. |
| GND | Ground Reference | Signal and power ground reference for all I/O and internal circuitry; requires low-impedance connection for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | Enables secure storage of bootloader code in 16K-byte region (00000H–03FFFH); once enabled, prevents accidental overwrite during field updates of application code. |
| 5V-Only Reprogrammability | Eliminates need for external 12V programming supply; simplifies system design and reduces BOM count in embedded controllers. |
| Hardware Data Protection | Combines VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock (OE low/CE high/WE high blocks writes). |
| DATA Polling & Toggle Bit | Provides real-time, hardware-verified status of program/erase completion without polling fixed delays or external clocks. |
| CMOS Standby Current | 100 µA typical at VCC = 5 V - enables ultra-low-power retention during system sleep modes without data loss. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing firmware and configuration parameters in programmable logic controllers deployed in factory automation environments with ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Nonvolatile program memory providing fast 90 ns read access for real-time instruction fetch and reliable byte-level reprogramming during maintenance windows. Use Value: Sector erase capability isolates parameter updates from main firmware, reducing risk of corruption; boot-block lockout ensures bootloader integrity across 10,000+ field updates. | Use Scenario: Holding certified bootloader and safety-critical startup routines in Class II medical instruments requiring traceable, tamper-resistant firmware storage. IC Role / Device Role / Timing Role: Secure, reprogrammable Flash memory with hardware-enforced write protection for boot code region, operating under strict IEC 62304 compliance constraints. Use Value: 100 µA standby current extends battery-backed operation during power-loss events; DATA polling enables deterministic firmware validation before system initialization. |
| Automotive Diagnostic Tool Code Storage | Legacy Industrial HMI Application Code |
Use Scenario: Embedded diagnostic tools used in service bays to reflash ECUs, requiring field-upgradable application code compatible with 5V microcontroller buses. IC Role / Device Role / Timing Role: In-system reprogrammable Flash memory interfaced directly to 8051 or Z80 derivatives via standard CE/OE/WE control lines. Use Value: 5V-only operation avoids level-shifting complexity; 10 µs/byte programming enables rapid tool software updates without dedicated programmers. | Use Scenario: Human-machine interface panels in manufacturing equipment where application logic resides in external Flash and must survive 15+ years of operation. IC Role / Device Role / Timing Role: Long-life, pin-compatible replacement for obsolete EPROMs in legacy 8-bit systems with existing 32-pin DIP footprints. Use Value: Direct drop-in compatibility with PDIP-32 sockets; 10,000-cycle endurance exceeds typical field upgrade frequency by >10×, ensuring lifetime reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F002N-90JI | Same 2 Mbit density and 90 ns speed, but in industrial-grade PLCC (32J) package with -40°C to +85°C temperature range. | Required for extended temperature operation in outdoor or uncontrolled industrial enclosures. | Select AT49F002N-90JI when ambient operating temperature exceeds 70°C or board layout requires surface-mount PLCC footprint. |
| AT29C020-90PC | 2 Mbit (256K × 8) Flash with identical PDIP-32 package and 90 ns access, but uses different command set and lacks boot-block lockout. | Used where full chip erase is acceptable and bootloader protection is handled externally or not required. | Choose AT29C020-90PC only if existing firmware does not rely on AT49F002N's sector-protected boot block or 12V override capability. |
Compared with AT49F002N-90JI, the AT49F002N-90PC offers commercial-temperature operation at lower cost and through-hole assembly compatibility; versus AT29C020-90PC, it provides superior data integrity via hardware-enforced boot-block write protection and deterministic DATA polling - critical for safety-critical firmware updates.
Availability
AT49F002N-90PC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and legacy industrial HMI application code requiring stable component supply and long-term obsolescence management.
Supply support for AT49F002N-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 (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, Flash memory, and mixed-signal ICs for embedded systems.
The AT49F002N product line delivers 5V-only, in-system reprogrammable Flash memory optimized for firmware storage in resource-constrained 8-bit and 16-bit microcontroller platforms requiring field-upgradability and data integrity.
FAQ
What is the memory organization of the AT49F002N-90PC?
The AT49F002N-90PC contains 2 megabits of Flash memory organized as 262,144 words by 8 bits (256K × 8). Its physical address space spans 00000H to 3FFFFH, partitioned into a 16K-byte boot block (00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks of 96K and 128K bytes respectively. This structure is fixed for the AT49F002N-90PC variant.
Does the AT49F002N-90PC support boot block programming lockout?
Yes, the AT49F002N-90PC supports boot block programming lockout. Its 16K-byte boot block (00000H–03FFFH) can be permanently protected from reprogramming using a six-cycle command sequence. Once enabled, the lockout cannot be reversed with 5.5 V or less - a key security feature confirmed in the official Atmel datasheet for AT49F002N-90PC.
What package type and pin count does the AT49F002N-90PC use?
The AT49F002N-90PC uses a 32-pin, 0.600" wide plastic dual inline package (PDIP), designated as package code 32P6. Pin 9 is a no-connect (NC) terminal, and pin 1 is index-marked per JEDEC standard. This through-hole package is compatible with legacy socketed designs and manual prototyping workflows.
Can the AT49F002N-90PC be reprogrammed using only 5V supply?
Yes, the AT49F002N-90PC is a 5V-only Flash memory device. It requires no external high-voltage programming supply: all read, program, and erase operations execute using standard 5.0 V ±10% VCC. Internal charge pumps generate necessary voltages, enabling direct integration with 5V microcontroller buses without level shifters or auxiliary supplies.
What is the maximum erase time for the AT49F002N-90PC?
The maximum erase cycle time for the AT49F002N-90PC is 10 seconds, whether performing full chip erase or sector erase. This value is guaranteed across the commercial temperature range (0°C to +70°C) and applies to both parameter blocks and main memory blocks. Erase timing is internally controlled and requires no external clocking.
AT49F002N-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
AT49F002N-90PC FAQ
1.How can I place an order for AT49F002N-90PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002N-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 AT49F002N-90PC reliable?
The price and inventory of AT49F002N-90PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002N-90PC is usually 5 days.
3.What payment methods are accepted for AT49F002N-90PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002N-90PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002N-90PC?
AT49F002N-90PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002N-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 AT49F002N-90PC?
For technical support, including AT49F002N-90PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002N-90PC requirements.
6.How does Aetrix verify that AT49F002N-90PC is sourced from the original manufacturer or authorized distributors?
All AT49F002N-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 AT49F002N-90PC meets industry standards.
7.What is the process for return or replacement of AT49F002N-90PC?
All AT49F002N-90PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002N-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 AT49F002N-90PC part is unused and in its original packaging.
Return procedure for AT49F002N-90PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F002N-90PC Tags
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