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Microchip Technology AT49F002ANT-55VI
- Part No.:
- AT49F002ANT-55VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F002ANT-55VI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,410
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Product details
Overview
AT49F002ANT-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, and sector-based erase architecture including 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 status detection for embedded firmware storage applications.
For engineers reviewing the AT49F002ANT-55VI datasheet, AT49F002ANT-55VI pinout, AT49F002ANT-55VI application, or AT49F002ANT-55VI equivalent, key selection considerations include its TSOP-32 (32T) package, boot-block lockout capability, 4-second chip erase time, CMOS standby current of 100 µA, and compatibility with standard EPROM-like CE/OE/WE control interface.
Technical Context
The AT49F002ANT-55VI implements a nonvolatile CMOS Flash architecture with internal program control logic and autonomous erase timing. Its sector organization enables selective erasure of the boot block (3C000–3FFFFH), two parameter blocks (3A000–3BFFFH and 38000–39FFFH), and four main memory blocks (30000–37FFFH, 20000–2FFFFH, 10000–1FFFFH, and 00000–0FFFFH).
It uses standard microprocessor write timings for command execution-including Chip Erase (6-cycle 555/AA–AAA/55–555/80–555/AA–AAA/55–555/10), Sector Erase, Byte Program, and Boot Block Lockout-and supports both hardware and software product identification (Manufacturer Code 1FH, Device Code 08H).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits |
| Read Access Time | 55 ns - enables direct replacement of fast EPROMs in legacy 8-bit bus systems |
| Byte Programming Time | 20 µs typical - supports rapid field updates without external high-voltage circuitry |
| Chip Erase Time | 4 seconds max - allows full memory reset within predictable system timeout windows |
| Standby Current | 100 µA CMOS - minimizes power draw during idle states in battery-backed or low-power embedded controllers |
| Endurance | 10,000 program/erase cycles - ensures long-term reliability for firmware update partitions |
| Operating Voltage | 5 V ±10% - eliminates need for dual-supply rails or charge pumps in 5V system designs |
Pinout & Package
AT49F002ANT-55VI is supplied in a 32-lead Plastic Thin Small Outline Package (TSOP Type I, 8 × 20 mm, package code 32T). Pin 9 is no-connect (NC) per datasheet specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing space |
| I/O0–I/O7 | Data Input/Output | Bi-directional 8-bit data bus compatible with standard microprocessor data cycles |
| CE | Chip Enable | Active-low chip select enabling memory access only when asserted with OE |
| OE | Output Enable | Active-low output gate controlling data bus drive to prevent contention during shared-bus operation |
| WE | Write Enable | Active-low signal initiating byte programming or command latching on falling edge |
| RESET | Reset Control | Active-low input halting ongoing operations and forcing high-impedance outputs; not used for boot override (unavailable on AN(T) variants) |
| VCC | Power Supply | +5 V supply pin; device inhibits programming if voltage drops below 3.8 V (VCC sense) |
| GND | Ground Reference | Signal and power ground reference for all digital and analog functions |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Supply Operation | Eliminates requirement for 12V programming voltage, simplifying power design and reducing BOM count |
| Boot Block Programming Lockout | 16K-byte protected region (3C000–3FFFFH) prevents accidental overwrite of critical startup code |
| DATA Polling & Toggle Bit Status | Enables real-time end-of-program detection without external polling delays or dedicated status lines |
| Sector Erase Architecture | Allows independent erasure of parameter blocks and main memory sections, preserving boot code during partial updates |
| Hardware Data Protection | Combines VCC sensing, noise filtering (<15 ns pulse rejection), and control-line inhibition to prevent spurious writes |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System BIOS |
|---|---|
Use Scenario: Storing and updating firmware in programmable logic controllers where field upgrades must preserve boot integrity. IC Role / Device Role / Timing Role: Nonvolatile program memory with sector-protected boot code and deterministic 55 ns read latency for instruction fetch. Use Value: Boot block lockout ensures bootloader remains uncorrupted during remote firmware patches; 10,000-cycle endurance supports multi-year deployment. | Use Scenario: Replacing obsolete EPROMs in aging industrial HMIs and motion controllers requiring in-circuit reprogramming. IC Role / Device Role / Timing Role: Drop-in Flash memory with EPROM-compatible CE/OE/WE interface and identical 256K × 8 organization. Use Value: 55 ns access time matches legacy EPROM timing; 5V-only operation avoids redesign of existing 5V power distribution networks. |
| Medical Device Configuration Memory | Automotive Diagnostic Module Storage |
Use Scenario: Holding calibration tables and safety-critical configuration parameters in Class II medical equipment. IC Role / Device Role / Timing Role: Parameter block storage (two 8K-byte sections) with hardware write protection and low standby current. Use Value: 100 µA CMOS standby current extends battery life in portable diagnostic tools; sector erase isolates config updates from firmware. | Use Scenario: Storing OBD-II protocol stacks and vehicle-specific diagnostic routines in aftermarket scan tools. IC Role / Device Role / Timing Role: Field-upgradable Flash memory supporting rapid byte-level patching via CAN-connected host. Use Value: 20 µs/byte programming enables sub-second firmware patches; DATA polling provides precise cycle completion signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV002BT-55REI | 3V/5V dual-voltage operation; 55 ns access; 2 Mbit density; different command set and sector map | Lacks boot block lockout; requires voltage translation in pure 5V systems | Choose when mixed-voltage system integration or extended temperature range (−40°C to +105°C) is required |
| SST39VF020-55-4C-NHE | 3V-only supply; 55 ns access; 2 Mbit density; 64K-byte uniform sectors; no boot block specialization | No dedicated boot protection; incompatible with 5V-only buses without level shifters | Prefer for new 3V designs prioritizing lower active current (18 mA vs. 30 mA) and higher endurance (100K cycles) |
Compared with AM29LV002BT-55REI and SST39VF020-55-4C-NHE, the AT49F002ANT-55VI uniquely delivers 5V-only operation with hardware-enforced boot block lockout and TSOP-32 packaging optimized for legacy board layouts-making it the only option that preserves both electrical compatibility and secure firmware partitioning in existing 5V industrial designs.
Availability
AT49F002ANT-55VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system BIOS replacement, medical device configuration memory, and automotive diagnostic module storage requiring stable component supply across extended lifecycle programs.
Supply support for AT49F002ANT-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 devices for industrial, automotive, and consumer applications.
The AT49F002A(N)(T) series was designed as a 5V-only Flash memory family targeting cost-sensitive, pin-compatible EPROM replacements in mature 8-bit embedded systems requiring in-system reprogrammability and boot code protection.
FAQ
What is the function of the RESET pin on the AT49F002ANT-55VI?
The RESET pin on the AT49F002ANT-55VI is an active-low input that halts ongoing program or erase operations and places outputs in high-impedance state. Unlike earlier variants, the AT49F002ANT-55VI does not support 12V boot block override via RESET - this feature is explicitly disabled in the AN(T) family per datasheet Section 4.3. The pin remains functional for basic reset coordination but cannot unlock protected boot sectors.
Does the AT49F002ANT-55VI support true 5V-only programming without external high-voltage generators?
Yes, the AT49F002ANT-55VI supports full 5V-only programming: read, byte programming, sector erase, and chip erase all operate at VCC = 5V ±10%. No external 12V or 12.5V supplies are needed. Internal charge pumps generate required programming voltages, and hardware data protection (VCC sense, noise filtering, control-line inhibition) ensures reliable operation solely from the 5V rail - a core design goal confirmed in the "Single-voltage Operation" feature list.
How is the boot block physically located and protected in the AT49F002ANT-55VI?
In the AT49F002ANT-55VI, the 16K-byte boot block occupies address range 3C000H–3FFFFH. Protection is enforced via a six-cycle command sequence (555/AA → AAA/55 → 555/80 → 555/AA → AAA/55 → 555/40) that permanently disables programming and erasure of this region under 5.5V. Once enabled, the lockout is irreversible without 12V RESET - which is unavailable on the AN(T) variant - making the boot block truly permanent for secure bootloader storage.
What package type and pin count does the AT49F002ANT-55VI use?
The AT49F002ANT-55VI uses a 32-lead Plastic Thin Small Outline Package (TSOP Type I, 8 × 20 mm), designated package code 32T per Atmel's Ordering Information table. Pin 9 is explicitly defined as no-connect (NC) for this variant. The pinout matches standard 32-pin Flash memory footprints and is mechanically and electrically compatible with industry-standard TSOP sockets used in industrial PCBs.
Can the AT49F002ANT-55VI be used as a direct replacement for EPROMs like the 27C020?
Yes, the AT49F002ANT-55VI is designed as a functional and pin-compatible replacement for 27C020 EPROMs in 5V systems. It shares identical 32-pin TSOP packaging, 256K × 8 organization, and EPROM-like CE/OE/WE control interface. Read timing (55 ns) meets or exceeds 27C020-55 specifications, and no hardware modifications are needed - though firmware must implement Flash-specific command sequences for programming instead of UV-erasure.
AT49F002ANT-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
AT49F002ANT-55VI FAQ
1.How can I place an order for AT49F002ANT-55VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002ANT-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 AT49F002ANT-55VI reliable?
The price and inventory of AT49F002ANT-55VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002ANT-55VI is usually 5 days.
3.What payment methods are accepted for AT49F002ANT-55VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002ANT-55VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002ANT-55VI?
AT49F002ANT-55VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002ANT-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 AT49F002ANT-55VI?
For technical support, including AT49F002ANT-55VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002ANT-55VI requirements.
6.How does Aetrix verify that AT49F002ANT-55VI is sourced from the original manufacturer or authorized distributors?
All AT49F002ANT-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 AT49F002ANT-55VI meets industry standards.
7.What is the process for return or replacement of AT49F002ANT-55VI?
All AT49F002ANT-55VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002ANT-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 AT49F002ANT-55VI part is unused and in its original packaging.
Return procedure for AT49F002ANT-55VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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