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Microchip Technology AT49F002A-55TI
- Part No.:
- AT49F002A-55TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F002A-55TI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,974
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Product details
Overview
AT49F002A-55TI 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 4-second chip erase. 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 for industrial microcontroller systems requiring field-upgradable code.
For engineers reviewing the AT49F002A-55TI datasheet, AT49F002A-55TI pinout, AT49F002A-55TI application, or AT49F002A-55TI equivalent, key selection considerations include boot block protection capability, TSOP-32 package compatibility, 5V-only operation without high-voltage programming, DATA polling/toggle bit end-of-write detection, and industrial temperature range (-40°C to +85°C) support.
Technical Context
The AT49F002A-55TI implements standard EPROM-compatible read interface with CE/OE/WE control logic and supports command-based byte programming and sector/chip erase via six-cycle software sequences. Its internal program control logic eliminates external timing circuitry, and hardware data protection includes VCC sense (<3.8V inhibition), noise filtering (<15 ns pulse rejection), and write-inhibit conditions (OE low, CE high, or WE high).
Boot block lockout is configurable via command sequence and provides permanent write protection for secure startup code; for the AT49F002A-55TI variant, the boot block resides at address 3C000H–3FFFFH and remains unerasable under ≤5.5V when enabled. RESET pin override at 12V allows emergency reprogramming of locked boot sectors - a feature confirmed active on AT49F002A-55TI per datasheet Section 4.3 and 4.6.2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), enabling full firmware image storage for mid-complexity 8/16-bit MCUs |
| Read Access Time | 55 ns max - supports direct bus interfacing with 18 MHz microcontrollers without wait states |
| Byte Programming Time | 20 µs typical - enables fast field updates of configuration or calibration data |
| Chip Erase Time | 4 seconds max - allows rapid full-memory reinitialization during manufacturing or recovery |
| End-of-Write Detection | DATA polling (I/O7 complement) and toggle bit (I/O6) - eliminates need for fixed delay timers 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 test equipment or gateways |
| Operating Temperature | -40°C to +85°C - qualified for industrial control cabinets and outdoor embedded enclosures |
Pinout & Package
AT49F002A-55TI uses a 32-lead Plastic Thin Small Outline Package (TSOP, Type I, 8 × 20 mm), JEDEC MO-142 compliant. Pin 1 is marked by beveled corner; pin 9 is no-connect (NC) per datasheet Section 2.2 and Ordering Information Table 27.1.
| 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 | Bi-directional Data Bus | 8-bit parallel interface; carries command data, product ID codes, and memory contents |
| CE | Chip Enable | Active-low chip select; must be low with OE low for read, high for standby (100 µA) |
| OE | Output Enable | Active-low output control; prevents bus contention when high during writes or standby |
| WE | Write Enable | Active-low write strobe; latches addresses/data during command and programming cycles |
| RESET | Reset Input | Active-low halts operations; 12V input overrides boot block lockout (confirmed for AT49F002A-55TI) |
| VCC | Power Supply | 5.0V ±10% supply; VCC sense disables programming if <3.8V (prevents corruption during brownout) |
| GND | Ground | Reference for all signals and power; decoupling required within 10 mm of VCC pin |
| Pin 9 | No Connect (NC) | Unbonded pad - must be left floating; not tied to VCC, GND, or any signal |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | Enables permanent protection of 16K-byte boot code (3C000H–3FFFFH) while allowing updates to remaining 240K bytes |
| 5V-Only Reprogrammability | Eliminates need for 12V programming supplies or level shifters - simplifies PCB design and reduces BOM cost |
| DATA Polling & Toggle Bit | Hardware-assisted write completion detection avoids fixed delays and improves host CPU efficiency during firmware updates |
| Hardware Data Protection | VCC sensing, noise filtering, and multi-signal inhibit prevent accidental writes during power transients or EMI events |
| Green Packaging Option | Pb/halide-free TSOP package complies with RoHS Directive 2011/65/EU without derating performance |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing boot loader and application firmware in programmable logic controllers deployed in factory automation environments with ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; provides 55 ns read latency for deterministic MCU instruction fetch timing. Use Value: Enables remote firmware patches without hardware replacement; boot block lockout ensures bootloader integrity during field updates. | Use Scenario: Holding calibrated sensor parameters and safety-critical startup routines in portable diagnostic equipment requiring regulatory compliance and long-term data retention. IC Role / Device Role / Timing Role: Secure parameter storage with write-protection; operates reliably across -40°C to +85°C thermal cycling during device sterilization and field use. Use Value: Prevents unauthorized modification of calibration data via boot block lockout; 10,000-cycle endurance supports lifetime recalibration intervals. |
| Telecom Base Station Boot ROM | Automotive Body Control Module (BCM) Code Storage |
Use Scenario: Hosting initialization code and communication stack binaries in outdoor telecom infrastructure exposed to wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Primary boot memory with hardware write protection; 4-second chip erase enables rapid recovery from corrupted images. Use Value: RESET pin 12V override allows emergency bootloader reflash during maintenance; TSOP package supports high-density board layouts. | Use Scenario: Storing vehicle-specific configuration tables and CAN protocol handlers in body control modules subject to automotive qualification requirements. IC Role / Device Role / Timing Role: Field-upgradable firmware storage; 5V-only operation interfaces directly with 5V automotive microcontrollers without voltage translation. Use Value: Sector erase capability permits selective update of lighting or door control logic without erasing safety-critical airbag routines. |
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 core with 5V I/O; 55 ns access; 16K boot sector; no RESET-based boot override | Requires dual-supply design; lacks 12V RESET override for locked boot sectors | Select if system already uses 3V logic and needs lower active current (20 mA vs. 30 mA) |
| SST39VF020-55-4C-NHE | 3.3V only; 55 ns access; 8K boot sector; no hardware RESET override | Incompatible with 5V bus systems; smaller boot sector limits secure code size | Choose for new 3.3V designs prioritizing lower power and smaller footprint over 5V compatibility |
Compared with AM29LV002BT-55REI and SST39VF020-55-4C-NHE, the AT49F002A-55TI uniquely supports 5V-only operation with RESET-pin-enabled boot sector reprogramming - critical for legacy industrial systems where voltage translation adds cost and failure risk.
Availability
AT49F002A-55TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, telecom base station boot ROM, and automotive BCM code storage requiring stable component supply across extended lifecycles.
Supply support for AT49F002A-55TI 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-55TI belongs to Atmel's 5V Flash memory product line, designed specifically for in-system reprogrammability in legacy 5V embedded systems requiring robust boot code protection and field firmware updates.
FAQ
What is the boot block address range for AT49F002A-55TI?
The boot block for AT49F002A-55TI resides at address 3C000H to 3FFFFH (16K bytes), distinct from the AT49F002A-55JI PLCC variant which uses 00000H–03FFFH. This relocation enables flexible memory mapping in systems where lower address space is reserved for RAM or peripherals. The AT49F002A-55TI datasheet confirms this range in Section 4.6 and Notes under Command Definitions.
Does AT49F002A-55TI support 12V RESET override for boot block reprogramming?
Yes, AT49F002A-55TI supports 12V ±0.5V applied to the RESET pin to override boot block lockout - a feature explicitly confirmed active for AT49F002A(N)T variants in Section 4.3 and 4.6.2 of the datasheet. This allows emergency reprogramming of protected boot sectors during service, unlike the AT49F002AN(T) variant where this function is disabled.
What is the meaning of "pin 9 NC" for AT49F002A-55TI?
Pin 9 on the AT49F002A-55TI TSOP package is designated No Connect (NC) per datasheet Section 2.2 and Ordering Information Table 27.1. It is an unbonded pad that must remain electrically floating - not connected to VCC, GND, or any signal trace. This NC status is specific to the AT49F002A-55TI and differs from PLCC variants where pin 1 serves as NC.
How does DATA polling work on AT49F002A-55TI during byte programming?
During byte programming, reading the last programmed address returns the complement of the loaded data on I/O7 until completion; once valid data appears on I/O7, the cycle is finished. This allows the host MCU to poll asynchronously without fixed delays. The AT49F002A-55TI datasheet specifies this behavior in Section 4.5 and Figure 21, confirming it functions identically across all AT49F002A(N)(T) variants.
Is AT49F002A-55TI RoHS compliant?
Yes, AT49F002A-55TI is RoHS compliant and offered in green (Pb/halide-free) packaging per datasheet Section 1 and Ordering Information Table 27.2. The TSOP-32 package meets Directive 2011/65/EU requirements without performance derating, and no lead-free conversion notice or exemption is cited in the document.
AT49F002A-55TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm 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-TSOP
AT49F002A-55TI FAQ
1.How can I place an order for AT49F002A-55TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002A-55TI 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-55TI reliable?
The price and inventory of AT49F002A-55TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002A-55TI is usually 5 days.
3.What payment methods are accepted for AT49F002A-55TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002A-55TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002A-55TI?
AT49F002A-55TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002A-55TI 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-55TI?
For technical support, including AT49F002A-55TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002A-55TI requirements.
6.How does Aetrix verify that AT49F002A-55TI is sourced from the original manufacturer or authorized distributors?
All AT49F002A-55TI 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-55TI meets industry standards.
7.What is the process for return or replacement of AT49F002A-55TI?
All AT49F002A-55TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002A-55TI, 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-55TI part is unused and in its original packaging.
Return procedure for AT49F002A-55TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F002A-55TI Tags
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