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Microchip Technology AT49F002AN-55VI
- Part No.:
- AT49F002AN-55VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F002AN-55VI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,708
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Product details
Overview
AT49F002AN-55VI from Atmel is a 2 Mbit (256K × 8) 5V-only in-system reprogrammable Flash memory with 55 ns read access time, 20 µs/byte programming, 4-second chip erase, and sector architecture comprising one 16K-byte boot block, two 8K-byte parameter blocks, and four main memory blocks (32K + 3×64K). It operates across the industrial temperature range (−40°C to +85°C) and supports hardware data protection, DATA polling, and toggle-bit end-of-cycle detection for embedded firmware storage.
For engineers reviewing the AT49F002AN-55VI datasheet, AT49F002AN-55VI pinout, AT49F002AN-55VI application, or AT49F002AN-55VI equivalent, key selection criteria include boot-block lockout capability, 5V-only command interface compatibility with standard microprocessor buses, sector-erase granularity for field firmware updates, and PLCC-32 package suitability for legacy industrial PCB layouts.
Technical Context
The AT49F002AN-55VI implements a nonvolatile CMOS Flash architecture with internal program control logic and autonomous erase timing-no external clocks required. Its command-set-driven operation uses standard CE/OE/WE control lines and supports hardware reset (though RESET pin is NC on this variant), enabling EPROM-like read behavior and byte-level in-system reprogramming without high-voltage programming supplies.
Memory organization is fixed: boot block at 00000H–03FFFH (16K bytes), parameter blocks at 04000H–05FFFH and 06000H–07FFFH (8K each), and main blocks spanning 08000H–FFFFH (32K), 10000H–1FFFFH (64K), 20000H–2FFFFH (64K), and 30000H–3FFFFH (64K). The boot block supports permanent lockout via six-cycle command sequence, preventing accidental overwrite of secure startup code.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), sufficient for bootloader + configuration + application firmware in space-constrained embedded systems |
| Read Access Time | 55 ns maximum - enables direct execution from flash (XIP) in 20 MHz microcontroller systems without wait states |
| Byte Programming Time | 20 µs typical - allows rapid field updates of small configuration parameters or calibration data |
| Chip Erase Time | 4 seconds maximum - supports full firmware replacement during maintenance windows without excessive downtime |
| Endurance | 10,000 write/erase cycles - validated for firmware update cycles over 5+ years in industrial control applications |
| Power Dissipation | 30 mA active / 100 µA CMOS standby - meets low-power requirements for battery-backed or energy-harvesting edge nodes |
| Operating Voltage | 5.0 V ±10% - compatible with legacy 5V logic families and eliminates need for voltage translation |
Pinout & Package
AT49F002AN-55VI is supplied in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package per JEDEC MS-016, Variation AE. Pin 1 is marked by a corner chamfer; pins are numbered counterclockwise. Pin 1 is NC (no connect) per datasheet specification.
| 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 8051, Z80, and 68K family microcontrollers |
| 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 control; used with CE to prevent bus contention during shared-memory access |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle timing |
| RESET | Reset Input | No-connect (NC) on AT49F002AN-55VI - boot block override via 12V on RESET is not available for this variant |
| VCC | Power Supply | +5.0 V supply; device inhibits programming if VCC drops below 3.8 V (VCC sense protection) |
| GND | Ground | Reference return path for all signals and power; decoupling capacitor required within 10 mm of VCC/GND pins |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | Enables permanent protection of 16K-byte boot code region (00000H–03FFFH) while allowing updates to remaining memory - critical for secure boot integrity |
| DATA Polling & Toggle Bit Detection | Allows software-driven end-of-program/erase verification without polling timers or external status lines - reduces MCU resource usage and improves update reliability |
| Hardware Data Protection | Triple-layer safeguard: VCC sense (blocks programming <3.8 V), control-line inhibit (OE high/CE high/WE high), and noise filtering (<15 ns pulses ignored) - prevents spurious writes in noisy industrial environments |
| 5V-Only Command Interface | Eliminates need for 12V programming supply or level shifters - simplifies system design and reduces BOM cost versus older Flash devices |
| Green (Pb/Halide-Free) Packaging Option | Complies with RoHS Directive 2011/65/EU - supports environmental compliance for global industrial equipment shipments |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O mapping tables in programmable logic controllers subject to frequent field updates and EMI-rich factory floor environments. IC Role / Device Role / Timing Role: Nonvolatile program memory with sector-erase capability and hardware write protection - ensures boot code persistence during partial firmware upgrades. Use Value: 4-second chip erase and 20 µs/byte programming enable under-5-minute firmware patch cycles; NC RESET pin simplifies layout by removing high-voltage routing. | Use Scenario: Holding calibrated sensor coefficients, user preferences, and regulatory audit logs in portable diagnostic instruments requiring long-term data retention and tamper resistance. IC Role / Device Role / Timing Role: Secure configuration storage with boot-block lockout - prevents unauthorized modification of FDA-mandated calibration constants. Use Value: 10,000-cycle endurance supports >10 years of daily recalibration; 100 µA standby current extends battery life in handheld units. |
| Automotive Body Control Module (BCM) | Legacy Industrial HMI Display Firmware |
Use Scenario: Storing lighting control algorithms and CAN message lookup tables in automotive BCMs operating across −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Temperature-stable Flash memory with 55 ns read access - enables real-time response to door-lock or headlight commands without latency penalties. Use Value: Industrial-grade temp range and 5V-only interface ensure compatibility with existing 5V automotive power domains; PLCC-32 package withstands thermal cycling stress. | Use Scenario: Hosting GUI bitmaps and menu logic in monochrome LCD HMIs deployed in factory automation panels with 15+ year service lifecycles. IC Role / Device Role / Timing Role: Long-lifecycle firmware storage with proven reliability - selected for backward compatibility with aging 8-bit microcontroller toolchains. Use Value: 2 Mbit density accommodates full display firmware plus localization strings; PLCC-32 footprint matches legacy board designs, avoiding redesign costs. |
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/5V dual-voltage operation; 55 ns access; 2 Mbit; TSOP-32 package; no boot block lockout | Lacks dedicated boot sector protection; requires external logic for secure boot isolation | Choose when migrating to 3.3V systems or when boot block lockout is unnecessary |
| SST39VF020-55-4C-NHE | 3.3V only; 55 ns access; 2 Mbit; PLCC-32; single-power-supply; no RESET pin function | Lower voltage operation reduces power but requires level-shifting for 5V host interfaces | Prefer for new 3.3V designs where 5V compatibility is not required |
Compared with AM29LV002BT-55EI and SST39VF020-55-4C-NHE, the AT49F002AN-55VI uniquely provides 5V-only operation with hardware-enforced boot block lockout in a PLCC-32 package - making it irreplaceable for maintaining secure, field-upgradable firmware in legacy 5V industrial systems without PCB redesign.
Availability
AT49F002AN-55VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive body control module applications requiring stable component supply and long-term lifecycle support.
Supply support for AT49F002AN-55VI 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 drop-in EPROM replacement offering in-system reprogrammability for legacy 5V embedded systems - prioritizing pin compatibility, simple command protocols, and robust data retention over high-speed performance.
FAQ
What is the memory organization of the AT49F002AN-55VI?
The AT49F002AN-55VI contains 2 Mbit (262,144 × 8) of Flash memory organized into one 16K-byte boot block (00000H–03FFFH), two 8K-byte parameter blocks (04000H–05FFFH and 06000H–07FFFH), and four main memory blocks: 32K bytes (08000H–FFFFH), and three 64K-byte blocks (10000H–1FFFFH, 20000H–2FFFFH, 30000H–3FFFFH). This structure enables selective erasure and secure boot code isolation.
Does the AT49F002AN-55VI support boot block programming lockout?
Yes, the AT49F002AN-55VI supports boot block programming lockout via a six-cycle command sequence. Once enabled, the 16K-byte boot block (00000H–03FFFH) becomes permanently protected against erase and program operations at ≤5.5 V. However, the RESET pin is NC on this variant, so 12V override is not available - lockout is irreversible under normal operating conditions.
What package type is used for the AT49F002AN-55VI?
The AT49F002AN-55VI uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package (JEDEC MS-016, Variation AE), with pin 1 designated by a corner chamfer and pin 1 defined as NC (no connect) per the official datasheet. This package provides mechanical robustness and thermal performance suited for industrial PCB assembly and rework.
How does the AT49F002AN-55VI handle end-of-program detection?
The AT49F002AN-55VI supports two hardware-assisted end-of-program detection methods: DATA polling (I/O7 returns complement of written data until completion, then true data) and toggle-bit detection (I/O6 toggles between 0 and 1 during operation, then stabilizes). Both methods eliminate the need for fixed delay loops and improve firmware update reliability in variable-temperature environments.
Is the AT49F002AN-55VI compatible with standard microprocessor buses?
Yes, the AT49F002AN-55VI is fully compatible with standard 8-bit microprocessor buses using CE, OE, and WE control lines. Its read operation mirrors EPROM behavior: data appears on I/O0–I/O7 when CE and OE are low and WE is high. Address and data setup/hold times meet common 8051, Z80, and 68K timing requirements, enabling plug-and-play integration without glue logic.
AT49F002AN-55VI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.488", 12.40mm 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:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49F002AN-55VI FAQ
1.How can I place an order for AT49F002AN-55VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002AN-55VI 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 AT49F002AN-55VI reliable?
The price and inventory of AT49F002AN-55VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002AN-55VI is usually 5 days.
3.What payment methods are accepted for AT49F002AN-55VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002AN-55VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002AN-55VI?
AT49F002AN-55VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002AN-55VI 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 AT49F002AN-55VI?
For technical support, including AT49F002AN-55VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002AN-55VI requirements.
6.How does Aetrix verify that AT49F002AN-55VI is sourced from the original manufacturer or authorized distributors?
All AT49F002AN-55VI 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 AT49F002AN-55VI meets industry standards.
7.What is the process for return or replacement of AT49F002AN-55VI?
All AT49F002AN-55VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002AN-55VI, 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 AT49F002AN-55VI part is unused and in its original packaging.
Return procedure for AT49F002AN-55VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F002AN-55VI Tags
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