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Microchip Technology AT49F002A-55VI
- Part No.:
- AT49F002A-55VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F002A-55VI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,863
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Product details
Overview
AT49F002A-55VI from Atmel is a 2 Mbit (256K × 8) single-supply 5V-only Flash memory IC with 55 ns read access time, 20 µs/byte programming, 4-second chip erase, and hardware data protection. It features sector architecture including one 16K-byte boot block with programmable lockout, two 8K-byte parameter blocks, and four main memory blocks (32K + 3×64K), used in embedded firmware storage and boot code retention.
For engineers reviewing the AT49F002A-55VI datasheet, AT49F002A-55VI pinout, AT49F002A-55VI application, or AT49F002A-55VI equivalent, key selection considerations include boot block lockout behavior, 5V-only reprogrammability, TSOP-32 (32V) package compatibility, industrial temperature range (−40°C to +85°C), and DATA polling/toggle bit end-of-cycle detection.
Technical Context
The AT49F002A-55VI implements a command-based flash architecture requiring six-bus-cycle sequences for chip/sector erase and boot lockout enable, with internal timing eliminating external clocks. It supports standard EPROM-like read interface (CE/OE/WE control) and byte-level programming via internal command register with automatic pulse generation.
Its sector organization enables selective erasure: boot block (16K bytes), two parameter blocks (8K each), and four main blocks (32K + 3×64K). Boot block lockout-once enabled-prevents reprogramming at ≤5.5V; override requires 12V on RESET (not available on AN/T variants).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), sufficient for firmware images and configuration data in microcontroller-based systems |
| Read Access Time | 55 ns - enables direct execution from flash in real-time embedded applications without wait states |
| Byte Programming Time | 20 µs typical - supports fast field updates of small data segments without full-chip erase overhead |
| Erase Cycle Time | 4 seconds max for full chip erase - balances speed and reliability for in-system reprogramming |
| End-of-Operation Detection | DATA polling (I/O7 complement) and toggle bit (I/O6) - eliminates need for fixed timing delays in host firmware |
| Power Dissipation | 30 mA active / 100 µA CMOS standby - suitable for low-power industrial controllers with sleep modes |
| Endurance | 10,000 program/erase cycles - validated for frequent firmware revision in deployed equipment |
Pinout & Package
AT49F002A-55VI is supplied in a 32-lead Plastic Thin Small Outline Package (VSOP), 8 mm × 14 mm footprint, compliant with JEDEC MO-142 Variation BA. Pin 1 is marked by a notch or dot; pin 9 is NC (no connect) per datasheet.
| 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 | Data Inputs/Outputs | Bi-directional 8-bit data bus; I/O7 used for DATA polling, I/O6 for toggle bit status monitoring |
| CE | Chip Enable | Active-low chip select; must be low with OE low for read, high to enter standby (100 µA) |
| OE | Output Enable | Active-low output control; prevents bus contention when high during write/erase operations |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming |
| RESET | Reset Input | High = normal operation; low = high-Z outputs; 12V pulse enables boot block override (functional on -55VI) |
| VCC | Power Supply | 5.0 V ±10%; device inhibits programming if VCC < 3.8 V (VCC sense protection) |
| GND | Ground | Reference for all inputs/outputs; decoupling capacitor required near VCC pin per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V supply operation | Eliminates need for 12V programming voltage, simplifying power design and enabling direct MCU interface |
| Boot block programming lockout | 16K-byte region (00000H–03FFFH) protected from accidental overwrite; lock enabled via 6-cycle command sequence |
| Sector-erasable architecture | Independent erase of boot, parameter, and main memory blocks avoids full-chip erase for partial updates |
| Hardware data protection | VCC sense, noise filtering (<15 ns pulses rejected), and control-line inhibit prevent spurious writes |
| Green Pb/halide-free packaging | Meets RoHS compliance requirements for industrial and commercial electronics manufacturing |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
|
Use Scenario: Storing firmware and calibration tables in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast 55 ns read access enabling deterministic scan cycle timing. Use Value: Sector erase allows field updates of application logic without overwriting critical boot loader stored in protected 16K boot block. |
Use Scenario: Securing boot code and regulatory-compliant initialization routines in Class II medical diagnostic instruments. IC Role / Device Role / Timing Role: Trusted boot memory with hardware-enforced write protection preventing unauthorized modification. Use Value: Boot block lockout ensures FDA-required boot integrity; 10,000-cycle endurance supports long-term device service life. |
| Automotive Body Control Module | Networking Equipment Configuration Storage |
|
Use Scenario: Holding vehicle-specific configuration data and minor firmware patches in body control units across temperature extremes. IC Role / Device Role / Timing Role: Industrial-grade (−40°C to +85°C) flash memory interfaced directly to 8-bit microcontrollers via parallel bus. Use Value: 100 µA standby current minimizes battery drain during vehicle sleep mode; 5V-only operation matches legacy MCU I/O levels. |
Use Scenario: Storing MAC addresses, VLAN settings, and firmware version metadata in managed Ethernet switches. IC Role / Device Role / Timing Role: Parameter block (2×8K) used for nonvolatile configuration storage separate from main firmware image. Use Value: Independent sector erase enables safe configuration updates without risking corruption of running firmware in main memory blocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F002AN-55VI | No RESET pin functionality; boot block lockout override via 12V not supported | Not suitable where field reprogramming of locked boot code is required | Select AT49F002A-55VI when RESET-based boot override is needed for recovery or re-certification workflows |
| AT49F002AT-55VI | Boot block located at 3C000H–3FFFFH (top of address space); different sector map vs. AT49F002A-55VI (00000H–03FFFH) | Requires address remapping in host firmware; incompatible with existing boot loader binaries | Choose AT49F002A-55VI for legacy designs using bottom-addressed boot sectors and standard Atmel command sequences |
Compared with AT49F002AN-55VI and AT49F002AT-55VI, the AT49F002A-55VI provides full RESET-based boot override capability and bottom-aligned boot sector addressing-critical for backward-compatible firmware updates and certified system recovery paths.
Availability
AT49F002A-55VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, automotive body control module configuration, networking equipment parameter storage, and embedded system code update applications requiring stable component supply and long-term lifecycle support.
Supply support for AT49F002A-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, nonvolatile memory, and security ICs for industrial, automotive, and consumer applications.
The AT49F002A series belongs to Atmel's 5V-only Flash memory product line, designed specifically for in-system reprogrammability in resource-constrained embedded systems requiring reliable firmware storage and secure boot code protection.
FAQ
What is the boot block address range for AT49F002A-55VI?
The AT49F002A-55VI has its 16K-byte boot block located at address range 00000H to 03FFFH. This bottom-aligned sector is distinct from the AT49F002A(N)T variant, which places the boot block at 3C000H–3FFFFH. The AT49F002A-55VI uses the standard A(N) addressing scheme confirmed in the datasheet's Command Definitions and Block Diagram sections.
Does AT49F002A-55VI support 12V RESET-based boot block override?
Yes, AT49F002A-55VI supports 12V ±0.5V applied to the RESET pin to override boot block lockout, enabling chip/sector erase or byte programming even after lockout activation. This feature is explicitly documented in Section 4.6.2 and is functional on the -55VI variant, unlike the AN(T) versions where RESET override is unavailable.
What package type is used for AT49F002A-55VI?
AT49F002A-55VI uses the 32-lead VSOP (Very Small Outline Package), designated as package code 32V, with dimensions 8 mm × 14 mm and JEDEC MO-142 Variation BA compliance. Pin 9 is NC (no connect), and pin 1 is identified by a notch or dot per the mechanical drawing in Section 28.3 of the datasheet.
How is end-of-program detection implemented in AT49F002A-55VI?
AT49F002A-55VI provides two hardware methods: DATA polling (I/O7 returns complement of written data until completion, then true data) and toggle bit (I/O6 toggles between 0/1 during operation, stops when complete). Both are usable at any time during programming and eliminate reliance on fixed timing delays in host firmware.
What is the maximum erase time for AT49F002A-55VI?
The maximum erase cycle time for AT49F002A-55VI is 4 seconds for full chip erase, as specified in Section 17 (Program Cycle Characteristics) and confirmed in Section 4.4. This value applies under industrial temperature conditions (−40°C to +85°C) and includes internal timing control-no external clock or polling delay is required beyond the 4-second window.
AT49F002A-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
AT49F002A-55VI FAQ
1.How can I place an order for AT49F002A-55VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002A-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 AT49F002A-55VI reliable?
The price and inventory of AT49F002A-55VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002A-55VI is usually 5 days.
3.What payment methods are accepted for AT49F002A-55VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002A-55VI transactions.
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4.How is shipping managed for AT49F002A-55VI?
AT49F002A-55VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002A-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 AT49F002A-55VI?
For technical support, including AT49F002A-55VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002A-55VI requirements.
6.How does Aetrix verify that AT49F002A-55VI is sourced from the original manufacturer or authorized distributors?
All AT49F002A-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 AT49F002A-55VI meets industry standards.
7.What is the process for return or replacement of AT49F002A-55VI?
All AT49F002A-55VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002A-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 AT49F002A-55VI part is unused and in its original packaging.
Return procedure for AT49F002A-55VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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