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Microchip Technology AT49F002N-55PC
- Part No.:
- AT49F002N-55PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F002N-55PC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,050
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Product details
Overview
AT49F002N-55PC from Atmel is a 5V-only, 2 Mbit (256K × 8) in-system reprogrammable Flash memory IC with 55 ns read access time, sector-based architecture (16K-byte boot block + two 8K-byte parameter blocks + two main memory blocks), and hardware data protection. It operates across commercial temperature range (0°C to 70°C) and supports byte-by-byte programming at 10 µs/byte typical in embedded microcontroller boot code storage applications.
For engineers reviewing the AT49F002N-55PC datasheet, AT49F002N-55PC pinout, AT49F002N-55PC application, or AT49F002N-55PC equivalent, key selection considerations include its 55 ns access timing, boot block lockout capability, 10,000 write cycle endurance, CMOS standby current of 100 µA, and compatibility with standard EPROM-like CE/OE/WE control interface.
Technical Context
The AT49F002N-55PC implements a command-register-based architecture for erase and program operations using six-cycle software command sequences (e.g., chip erase: 5555h/AAh → 2AAAh/55h → 5555h/80h → 5555h/AAh → 2AAAh/55h → 5555h/10h). Its sector erase supports independent erasure of parameter blocks (8K bytes each) and main memory blocks (96K/128K bytes).
It features dual end-of-operation detection: DATA polling (I/O7 complement during programming) and Toggle Bit (I/O6 toggling during erase/program). Hardware protection includes VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low, CE high, or WE high blocks writes).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - directly maps to 8-bit microcontroller data bus without width conversion logic. |
| Read Access Time | 55 ns max - enables direct interface with 12–18 MHz microcontrollers without wait states. |
| Byte Programming Time | 10 µs typical - allows rapid field updates of configuration data or firmware patches without system downtime. |
| Erase Cycle Time | 10 seconds max for full chip - supports in-system firmware recovery without external programmer. |
| Endurance | 10,000 program/erase cycles - validated for industrial firmware update cycles over 5+ years of operation. |
| Standby Current | 100 µA CMOS - reduces power in battery-backed or low-power sleep modes. |
| Operating Voltage | 5.0 V ±10% - eliminates need for dedicated programming voltage supply; compatible with legacy 5V logic systems. |
Pinout & Package
AT49F002N-55PC uses a 32-pin, 0.600" wide plastic DIP (PDIP) package (package code 32P6), with pin 1 marked by notch or dot. Pin 1 is NC (no connect) per datasheet footnote.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A17 map directly to MCU address lines A0–A17. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path; tri-stated when CE or OE high - prevents bus contention in shared-memory systems. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - enables memory-mapped peripheral decoding. |
| OE | Output Enable | Active-low output control; used with CE to gate data outputs - allows interleaved access with other peripherals on same data bus. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence - critical for reliable software-controlled erase/program execution. |
| RESET | Reset Input | Active-low reset; forces outputs to high-Z and halts ongoing operations - required for safe recovery after power-up or fault conditions. |
| VCC, GND | Power Supply | Single 5V supply; decoupling capacitor (0.1 µF) required within 1 cm of pins to maintain signal integrity during fast transitions. |
| DC | No Connect | Pin 1 is unconnected - must remain floating; no pull-up/down or routing required. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte region (00000h–03FFFh) permanently protected after command activation - secures bootloader code against accidental overwrite during field firmware updates. |
| DATA Polling & Toggle Bit | Real-time status feedback via I/O7 complement or I/O6 toggle - eliminates need for fixed delay timers in host firmware, enabling deterministic operation across voltage/temperature variations. |
| Sector Erase Architecture | Independent erasure of two 8K-byte parameter blocks and two main memory blocks (96K/128K) - enables selective firmware partitioning (e.g., config vs. application code) without full-chip erase overhead. |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibit prevent spurious writes - ensures reliability in electrically noisy industrial environments without external watchdog supervision. |
| 5V-Only Reprogramming | No external 12V programming voltage required - simplifies PCB design and reduces BOM cost versus EPROM or older Flash devices. |
Applications
| Industrial PLC Firmware Storage | Embedded Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation systems. IC Role / Device Role / Timing Role: Nonvolatile program storage with in-system reprogrammability; 55 ns access supports real-time scan cycle execution. Use Value: Enables remote firmware updates over Modbus or Ethernet without hardware intervention, reducing maintenance downtime. | Use Scenario: Holding secure boot code for ARM Cortex-M or 8051-based edge devices requiring verified startup sequences. IC Role / Device Role / Timing Role: Boot block (00000h–03FFFh) stores immutable initialization routines; main memory holds updatable application code. Use Value: Boot block lockout prevents corruption of critical startup logic during OTA updates, ensuring system reliability. |
| Medical Device Configuration Storage | Automotive Diagnostic Module Memory |
Use Scenario: Retaining calibration data, user preferences, and safety-critical settings in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter block (two 8K-byte sections) stores field-serviceable calibration tables accessed during power-on self-test. Use Value: Sector erase allows recalibration data updates without disturbing operational firmware, meeting IEC 62304 traceability requirements. | Use Scenario: Storing OBD-II protocol stacks and vehicle-specific diagnostic routines in aftermarket scan tools. IC Role / Device Role / Timing Role: Main memory blocks (96K/128K) hold multiple vehicle manufacturer firmware variants; fast 10 µs/byte programming enables rapid tool reconfiguration. Use Value: Eliminates need for external EEPROM or serial Flash, reducing component count and improving EMI resilience in automotive EMC environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV002BT-55EC | 48-pin TSOP, 5V-only, 2 Mbit, 55 ns access, but uses different command set and lacks boot block lockout. | Requires modified driver firmware due to non-Atmel command sequences; no hardware-protected boot region. | Select if board layout accommodates 48-pin TSOP and firmware can be adapted to AMD command protocol. |
| MX29LV002CTTI-55G | 32-pin PDIP, 5V-only, 2 Mbit, 55 ns, identical pinout and command compatibility with AT49F002N-55PC per Macronix documentation. | Drop-in replacement with same boot block address map (00000h–03FFFh) and lockout behavior. | Preferred for second-source continuity where identical functionality and footprint are required without firmware changes. |
Compared with AM29LV002BT-55EC and MX29LV002CTTI-55G, the AT49F002N-55PC offers unique boot block lockout with hardware override (12V RESET), while MX29LV002CTTI-55G provides true pin-and-command compatibility, whereas AM29LV002BT-55EC requires firmware redesign and lacks secure boot protection.
Availability
AT49F002N-55PC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded bootloader memory, and medical device configuration storage requiring stable component supply and long-term obsolescence management.
Supply support for AT49F002N-55PC 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 ICs for industrial and embedded markets.
The AT49F002N series was designed as a 5V-only, in-system reprogrammable Flash memory solution targeting legacy 8-bit and 16-bit microcontroller systems requiring reliable, low-cost nonvolatile storage with robust data protection.
FAQ
What is the boot block address range for AT49F002N-55PC?
The boot block for AT49F002N-55PC occupies addresses 00000h to 03FFFh (16K bytes). This region supports programming lockout to protect bootloader code. The AT49F002N-55PC datasheet confirms this mapping applies specifically to the AT49F002N variant, distinguishing it from the AT49F002T variant which uses 3C000h–3FFFFh.
Does AT49F002N-55PC require a 12V supply for programming?
No, AT49F002N-55PC operates with single 5V supply for both read and reprogramming functions. A 12V signal on the RESET pin is only used to override boot block lockout - not for routine programming. Standard byte programming and sector erases execute at 5V, eliminating need for high-voltage circuitry.
How does the AT49F002N-55PC indicate completion of a byte programming cycle?
The AT49F002N-55PC supports two methods: DATA polling (reading the programmed address returns complemented data on I/O7 until completion) and Toggle Bit (I/O6 toggles between 0 and 1 during programming, then stabilizes). Both are implemented in hardware and require no external timing components - the AT49F002N-55PC handles all timing internally.
Can AT49F002N-55PC be used in industrial temperature applications?
AT49F002N-55PC is rated for commercial temperature range (0°C to 70°C) only. For industrial operation (-40°C to +85°C), the correct variant is AT49F002N-55PI (same PDIP package, industrial grade). Using AT49F002N-55PC outside its specified range may result in timing violations or data retention failure.
What is the function of pin 1 on AT49F002N-55PC?
Pin 1 on AT49F002N-55PC is designated "DC" (Don't Connect) and must remain unconnected - it is not bonded internally. This is explicitly stated in the AT49F002N-55PC datasheet for DIP and PLCC packages. Routing or pulling this pin will cause undefined behavior and is prohibited.
AT49F002N-55PC 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:
- 55 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-55PC FAQ
1.How can I place an order for AT49F002N-55PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002N-55PC 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-55PC reliable?
The price and inventory of AT49F002N-55PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002N-55PC is usually 5 days.
3.What payment methods are accepted for AT49F002N-55PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002N-55PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002N-55PC?
AT49F002N-55PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002N-55PC 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-55PC?
For technical support, including AT49F002N-55PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002N-55PC requirements.
6.How does Aetrix verify that AT49F002N-55PC is sourced from the original manufacturer or authorized distributors?
All AT49F002N-55PC 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-55PC meets industry standards.
7.What is the process for return or replacement of AT49F002N-55PC?
All AT49F002N-55PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002N-55PC, 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-55PC part is unused and in its original packaging.
Return procedure for AT49F002N-55PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F002N-55PC Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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