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Microchip Technology AT49F002ANT-55PI
- Part No.:
- AT49F002ANT-55PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F002ANT-55PI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,201
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Product details
Overview
AT49F002ANT-55PI from Atmel is a 5V-only, 2 Mbit (256K × 8) parallel-interface Flash memory IC with 55 ns read access time, sector-based architecture (1×16KB boot block, 2×8KB parameter blocks, 4×main blocks), and hardware data protection. It supports byte-by-byte programming (20 µs/byte typical), chip/sector erase (4 s max), and operates across –40°C to +85°C for industrial embedded firmware storage.
For engineers reviewing the AT49F002ANT-55PI datasheet, AT49F002ANT-55PI pinout, AT49F002ANT-55PI application, or AT49F002ANT-55PI equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in boot code and parameter storage, and validated alternative parts with documented functional and layout differences.
Technical Context
The AT49F002ANT-55PI implements a CMOS-based Flash memory array organized as 262,144 words × 8 bits, with dedicated boot block lockout logic that permanently protects 16 KB of code when enabled. Its command-set architecture uses six-cycle sequences (e.g., 555H/AAH → AAH/55H → 80H → 555H/AAH → AAH/55H → 40H) to activate boot lockout or initiate sector erase.
It features dual-line control (CE/OE) for bus contention avoidance, DATA polling (I/O7 complement detection) and Toggle Bit (I/O6 toggling) for end-of-program/erase verification, and RESET-pin-based 12V override for boot block reprogramming - though RESET is NC on AT49F002AN(T) variants, confirming AT49F002ANT-55PI retains full RESET functionality per its 'T' suffix designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), enabling full BIOS or bootloader storage in single-package footprint |
| Read Access Time | 55 ns - meets timing requirements for 18 MHz bus interfaces without wait states |
| Operating Voltage | 5 V ±10% - eliminates need for external voltage translators in legacy 5V systems |
| Erase Cycle Time | 4 seconds maximum - enables rapid field firmware updates without extended downtime |
| Programming Speed | 20 µs/byte typical - supports efficient incremental configuration writes during runtime |
| Endurance | 10,000 write/erase cycles - sufficient for industrial control parameter logging over 10+ years |
| Standby Current | 100 µA CMOS - critical for low-power modes in battery-backed embedded controllers |
Pinout & Package
AT49F002ANT-55PI is supplied in a 32-pin Plastic Dual Inline Package (PDIP), 0.600" wide (package code 32P6), with 0.100" lead pitch and through-hole mounting. Pin 1 is index corner, and pin 9 is NC (no connect) per datasheet note.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A11 is don't-care in command cycles |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with standard microprocessor data buses; supports DATA polling on I/O7 and Toggle Bit on I/O6 |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; inhibits programming if held high |
| OE | Output Enable | Active-low output control; used with CE for bus contention management; must be high during programming |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences; noise-filtered against <15 ns glitches |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12V input enables boot block override (functional on AT49F002ANT) |
| VCC / GND | Power Supply | 5V supply (±10%) and ground; VCC sense circuitry disables programming if voltage drops below 3.8V |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | Independent erasure of 16KB boot block, two 8KB parameter blocks, and four main memory blocks - enables selective firmware updates without full chip erase |
| Boot Block Lockout | Hardware-enforced write protection for boot code (00000H–03FFFH for non-T, 3C000H–3FFFFH for T variant); activated via 6-cycle command sequence |
| 12V RESET Override | Applying 12V ±0.5V to RESET pin unlocks protected boot block for chip/sector erase or byte programming - unique to AT49F002A(T) family including AT49F002ANT |
| HARDWARE Data Protection | VCC sense, WE/CE/OE state monitoring, and 15 ns noise filtering prevent accidental writes - eliminates need for external write-protection logic |
| DATA Polling & Toggle Bit | Real-time program/erase completion detection using I/O7 complement or I/O6 toggle - removes dependency on fixed timing delays in host firmware |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS Retention |
|---|---|
|
Use Scenario: Storing boot loader and configuration parameters in programmable logic controllers where firmware must survive power loss and support field upgrades. IC Role / Device Role / Timing Role: Nonvolatile program memory providing 55 ns read access to initialize FPGA configuration and real-time OS kernel. Use Value: Sector erase allows updating application logic while preserving boot code integrity; 10,000-cycle endurance ensures >10-year service life under weekly update cycles. |
Use Scenario: Replacing EPROM in legacy desktop/server motherboards requiring in-system reprogrammability without UV erasers. IC Role / Device Role / Timing Role: Parallel Flash memory mapped to CPU address space, accessed via standard CE/OE/WE control lines identical to EPROM timing. Use Value: 5V-only operation eliminates level-shifting; NC pin compatibility (pin 9) matches existing EPROM footprints; 25 mA active current fits legacy power budgets. |
| Medical Device Parameter Calibration | Automotive ECU Boot Code |
|
Use Scenario: Storing calibrated sensor offsets and safety-critical thresholds in portable diagnostic equipment requiring traceable, tamper-resistant storage. IC Role / Device Role / Timing Role: Secure parameter memory with boot block lockout preventing unauthorized modification of calibration constants during device servicing. Use Value: Hardware lockout ensures calibration data remains immutable unless 12V override is applied - meeting IEC 62304 software lifecycle requirements. |
Use Scenario: Holding boot code for engine control units where startup reliability depends on uncorrupted firmware after battery disconnect or brownout events. IC Role / Device Role / Timing Role: Primary boot memory with dedicated 16KB protected sector storing secure bootloader and cryptographic keys. Use Value: RESET-driven 12V override enables authorized reflash of boot sector during dealer-level diagnostics while maintaining production security. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV002BT-55EI | 3V core with 5V I/O tolerance; 55 ns access; 2 Mbit density; no RESET-based boot override | Lacks 12V RESET override; requires separate 3V supply rail; not drop-in compatible due to voltage domain mismatch | Select when migrating to lower-power 3V systems and external boot protection logic is acceptable |
| SST39VF200A-55-4C-NHE | 3.3V-only operation; 55 ns access; 2 Mbit density; Top/Bottom boot block configurable via hardware pins | No 12V override; boot block selection fixed at power-on; incompatible VCC requirement prevents direct substitution | Choose for new 3.3V designs needing flexible boot block orientation and simplified command set |
Compared with AM29LV002BT-55EI and SST39VF200A-55-4C-NHE, the AT49F002ANT-55PI uniquely supports 5V-only operation with hardware-enforced boot protection and 12V RESET override - making it the only option for legacy 5V systems requiring field-recoverable boot code integrity.
Availability
AT49F002ANT-55PI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy PC BIOS retention, medical device parameter calibration, and automotive ECU boot code applications requiring stable component supply and long-term obsolescence management.
Supply support for AT49F002ANT-55PI 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, automotive, and consumer applications.
The AT49F002A(N)(T) series was designed as a 5V-only, in-system reprogrammable Flash memory solution targeting legacy embedded systems requiring EPROM replacement with enhanced security and sector flexibility.
FAQ
What is the boot block address range for AT49F002ANT-55PI?
The AT49F002ANT-55PI uses the 'T' variant memory map, assigning its 16 KB boot block to address range 3C000H–3FFFFH. This differs from the base AT49F002A(N) which places the boot block at 00000H–03FFFH. The 'T' suffix explicitly denotes this top-sector organization, confirmed in the datasheet's Command Definitions table and Block Diagram labels for AT49F002A(N)T.
Does AT49F002ANT-55PI support 12V RESET override for boot block reprogramming?
Yes, AT49F002ANT-55PI fully supports 12V ±0.5V applied to the RESET pin to override boot block lockout - a feature explicitly reserved for the AT49F002A(T) family. The datasheet states "RESET feature is not available for the AT49F002AN(T)" but confirms RESET functionality and 12V override for AT49F002A(T), and AT49F002ANT-55PI is an AT49F002A(T) variant with PDIP packaging.
Is pin 9 on AT49F002ANT-55PI a no-connect (NC) or functional?
Pin 9 on AT49F002ANT-55PI is a no-connect (NC), as specified in the datasheet: "For the AT49F002AN(T) pin 1 for the DIP and PLCC packages and pin 9 for the TSOP package are no connect pins." Since AT49F002ANT-55PI uses the 32P6 (DIP) package and belongs to the (N)(T) family, pin 9 is NC - consistent across all DIP-packaged AT49F002A(N)(T) variants regardless of N/T suffix.
What is the maximum erase time for a full chip erase on AT49F002ANT-55PI?
The maximum erase time for a full chip erase on AT49F002ANT-55PI is 4 seconds, as specified in the AC Characteristics table under tEC (Erase Cycle Time). This value is guaranteed across the industrial temperature range (–40°C to +85°C) and applies when the boot block lockout is disabled; if enabled, chip erase skips the boot block but retains the same 4-second maximum for remaining sectors.
How does hardware data protection work on AT49F002ANT-55PI?
AT49F002ANT-55PI implements three hardware data protection mechanisms: (1) VCC sense circuitry disabling programming if supply drops below 3.8V, (2) program inhibit requiring OE high, CE high, or WE high to block writes, and (3) noise filtering rejecting input pulses shorter than 15 ns on WE or CE. These features operate autonomously without firmware intervention, preventing spurious writes during power transients or EMI events.
AT49F002ANT-55PI 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49F002ANT-55PI FAQ
1.How can I place an order for AT49F002ANT-55PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002ANT-55PI 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 AT49F002ANT-55PI reliable?
The price and inventory of AT49F002ANT-55PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002ANT-55PI is usually 5 days.
3.What payment methods are accepted for AT49F002ANT-55PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002ANT-55PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002ANT-55PI?
AT49F002ANT-55PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002ANT-55PI 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 AT49F002ANT-55PI?
For technical support, including AT49F002ANT-55PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002ANT-55PI requirements.
6.How does Aetrix verify that AT49F002ANT-55PI is sourced from the original manufacturer or authorized distributors?
All AT49F002ANT-55PI 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 AT49F002ANT-55PI meets industry standards.
7.What is the process for return or replacement of AT49F002ANT-55PI?
All AT49F002ANT-55PI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002ANT-55PI, 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 AT49F002ANT-55PI part is unused and in its original packaging.
Return procedure for AT49F002ANT-55PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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