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Microchip Technology AT49F001NT-90TC
- Part No.:
- AT49F001NT-90TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F001NT-90TC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,674
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Product details
Overview
AT49F001NT-90TC from Microchip Technology (formerly Atmel) is a 5V-only, 1 Mbit (128K × 8) in-system reprogrammable Flash memory IC with 90 ns read access time, sector-based architecture (16K boot block + two 8K parameter blocks + two main memory blocks), and hardware data protection. It serves as nonvolatile program/data storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the AT49F001NT-90TC datasheet, AT49F001NT-90TC pinout, AT49F001NT-90TC application, or AT49F001NT-90TC equivalent, key selection considerations include 5V-only operation, boot block lockout capability, 10 µs/byte typical programming time, 10-second erase cycle, and TSOP-32 package compatibility with space-constrained industrial control and telecom board designs.
Technical Context
The AT49F001NT-90TC implements a command-register-based architecture for byte programming, sector erasure, and chip erasure using standard microprocessor timing - no external high-voltage programming supply required. Its internal logic supports DATA polling (I/O7 complement) and toggle-bit detection (I/O6) for end-of-operation verification.
It features dual-line control (CE/OE) to prevent bus contention during read operations and includes VCC sense, noise filtering (<15 ns pulse rejection), and write-inhibit logic (OE low / CE high / WE high) for robust hardware data protection. The RESET pin enables system-level reset and - uniquely for the T variant - 12V override of boot block lockout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for bootloader + configuration + firmware segments in 8-bit/16-bit MCU systems. |
| Read Access Time | 90 ns max - meets timing requirements for 11 MHz bus interfaces without wait states in legacy embedded controllers. |
| Byte Programming Time | 10 µs typical - enables fast field updates of small configuration tables or calibration data without system downtime. |
| Erase Cycle Time | 10 seconds max for full chip or sector - supports predictable maintenance windows in industrial firmware update protocols. |
| End-of-Operation Detection | DATA polling (I/O7) and toggle-bit (I/O6) - eliminates need for fixed delay timers in host firmware, improving reliability across voltage/temperature variation. |
| Boot Block Protection | 16K-byte region (1C000H–1FFFFH) with lockout enable/disable via command sequence - isolates secure bootloader code from accidental overwrite during application updates. |
| Power Dissipation | 50 mA active current / 100 µA CMOS standby current - suitable for low-power modes in battery-backed or energy-conscious systems. |
Pinout & Package
AT49F001NT-90TC is housed in a 32-lead Plastic Thin Small Outline Package (TSOP, Type I, 8 × 20 mm), compliant with JEDEC MO-142 BD. Pin 1 is marked by a beveled corner; pin 9 is NC (no connect) per datasheet Rev. 1008D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 selects upper/lower half of memory map (e.g., boot block at 1C000H–1FFFFH). |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface compatible with standard microprocessor data buses; supports byte-wide reads/writes and status polling. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - enables multi-device bus sharing. |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention - outputs go high-Z when either CE or OE is high. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequences - critical for reliable programming/erase initiation. |
| RESET | Reset Input | Active-low system reset; halts ongoing operations and forces high-Z outputs; 12V input enables boot block override - unique to T variant. |
| VCC | Power Supply | +5.0 V ±10% supply; internal VCC sense disables programming if voltage drops below ~3.8 V - prevents corruption during brown-out. |
| GND | Ground Reference | Signal and power ground reference for all I/O and internal logic - requires low-impedance PCB connection to minimize noise coupling. |
| NC (Pin 9) | No Connect | Internally unconnected; must remain floating - not tied to VCC/GND or used for PCB routing. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | Enables secure separation of immutable bootloader (16K) from updatable application/parameter data - prevents bricking during field updates. |
| 5V-Only Reprogrammability | Eliminates need for 12V programming supplies or external charge pumps - simplifies system power design and reduces BOM cost. |
| Hardware Data Protection | VCC sense, noise filtering, and multi-signal write inhibit (OE/CE/WE) collectively prevent spurious writes during power transients or EMI events. |
| DATA Polling & Toggle Bit | Two independent, hardware-verified methods to detect completion of programming/erase - improves host firmware robustness without fixed timeouts. |
| 10,000 Write/Erase Cycles | Guaranteed endurance for frequent field updates - supports >5 years of daily reconfiguration in industrial logging or calibration applications. |
Applications
| Industrial PLC Firmware Storage | Telecom Line Card Configuration |
|---|---|
Use Scenario: Storing firmware images and runtime configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory holding bootloader, application code, and user-defined I/O mapping tables; accessed via 8-bit parallel bus with 90 ns timing. Use Value: Sector erase allows selective updating of parameter blocks without disturbing the protected 16K boot block, ensuring system recoverability after failed updates. |
Use Scenario: Holding line-specific initialization scripts, DSP coefficient sets, and protocol stack configurations in DSL or T1/E1 line interface cards. IC Role / Device Role / Timing Role: Field-upgradable configuration memory interfaced to a local microcontroller; leverages DATA polling for deterministic update sequencing. Use Value: 10 µs/byte programming enables rapid reconfiguration of multiple line cards during network provisioning without service interruption. |
| Embedded Medical Device Calibration | Automotive Body Control Module (BCM) |
Use Scenario: Storing sensor calibration constants and safety-critical operational limits in portable diagnostic equipment requiring periodic recalibration. IC Role / Device Role / Timing Role: Secure, tamper-resistant nonvolatile storage for calibration data; boot block lockout prevents unauthorized modification of safety guardrails. Use Value: Hardware data protection (VCC sense, noise filter) ensures integrity during battery swaps or transient power conditions common in handheld devices. |
Use Scenario: Retaining vehicle-specific configuration (e.g., door lock behavior, lighting profiles) and firmware patches in automotive BCMs across production lifecycles. IC Role / Device Role / Timing Role: In-system reprogrammable memory accessible via CAN-connected diagnostic tool; uses sector erase to update feature subsets independently. Use Value: 10,000-cycle endurance supports lifetime over-the-air (OTA) updates and dealer-level reprogramming without hardware replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV001MT-90EC | 3.3V core with 5V I/O tolerance; 90 ns access; 1 Mbit; boot block architecture but no 12V RESET override. | Lacks 12V boot block unlock; requires level-shifting for pure 5V systems; lower active current (30 mA). | Choose for mixed-voltage systems where 3.3V core efficiency matters and boot block override is unnecessary. |
| SST39VF010-90-4C-NHE | 3.3V only; 90 ns access; 1 Mbit; single 16K boot sector; no RESET pin; software-controlled lockout only. | No hardware RESET control or 12V override; incompatible with 5V-only designs; smaller footprint (32-pin TSOP II). | Choose for new 3.3V designs prioritizing cost and density; not suitable as drop-in replacement for AT49F001NT-90TC. |
Compared with AM29LV001MT-90EC and SST39VF010-90-4C-NHE, the AT49F001NT-90TC uniquely supports 5V-only operation with hardware-enforced boot block protection and 12V RESET override - critical for legacy industrial systems requiring guaranteed recovery paths and zero voltage translation.
Availability
AT49F001NT-90TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom line card configuration, and embedded medical device calibration requiring stable component supply across extended product lifecycles.
Supply support for AT49F001NT-90TC 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
Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel Flash memory products, including manufacturing, documentation, and long-term supply assurance.
The AT49F001NT-90TC belongs to Atmel's 5V Flash memory family, designed specifically for in-system reprogrammability in cost-sensitive, space-constrained embedded applications where robustness and field upgradeability are mandatory.
FAQ
What is the memory organization of the AT49F001NT-90TC?
The AT49F001NT-90TC contains 1 Mbit (131,072 × 8) of Flash memory, organized as 128K words × 8 bits. Its sector architecture comprises one 16K-byte boot block (address range 1C000H–1FFFFH), two 8K-byte parameter blocks, and two main memory blocks (32K and 64K bytes). This layout enables selective erasure and secure bootloader isolation in the AT49F001NT-90TC.
Does the AT49F001NT-90TC support 5V-only programming?
Yes, the AT49F001NT-90TC supports 5V-only operation for both read and reprogramming functions - no external high-voltage supply is needed. Programming is initiated via command sequences using standard 5V logic levels on CE, WE, and address/data lines, making it compatible with conventional microprocessor buses without additional voltage translation circuitry in the AT49F001NT-90TC.
How does boot block lockout work on the AT49F001NT-90TC?
The AT49F001NT-90TC provides a 16K-byte boot block (1C000H–1FFFFH) that can be permanently locked against reprogramming using a six-cycle command sequence. Once enabled, the lockout prevents erasure or programming at ≤5.5V. A 12V signal applied to the RESET pin overrides the lock, enabling recovery - a feature exclusive to the T variant like the AT49F001NT-90TC.
What package type is used for the AT49F001NT-90TC?
The AT49F001NT-90TC is supplied in a 32-lead Plastic Thin Small Outline Package (TSOP, Type I), measuring 8 × 20 mm, compliant with JEDEC MO-142 BD. Pin 1 is identified by a beveled corner; pin 9 is designated NC (no connect) and must remain unconnected on the PCB for proper AT49F001NT-90TC operation.
Can the AT49F001NT-90TC be used in industrial temperature applications?
Yes, the AT49F001NT-90TC is rated for industrial temperature operation (–40°C to +85°C) when ordered with the 'I' suffix (e.g., AT49F001NT-90TI). The commercial version ('C') operates from 0°C to +70°C. Both variants maintain full specification compliance - including 90 ns access time and 100 µA standby current - across their respective temperature ranges for the AT49F001NT-90TC.
AT49F001NT-90TC 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:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT49F001NT-90TC FAQ
1.How can I place an order for AT49F001NT-90TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001NT-90TC 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 AT49F001NT-90TC reliable?
The price and inventory of AT49F001NT-90TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001NT-90TC is usually 5 days.
3.What payment methods are accepted for AT49F001NT-90TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001NT-90TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001NT-90TC?
AT49F001NT-90TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001NT-90TC 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 AT49F001NT-90TC?
For technical support, including AT49F001NT-90TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001NT-90TC requirements.
6.How does Aetrix verify that AT49F001NT-90TC is sourced from the original manufacturer or authorized distributors?
All AT49F001NT-90TC 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 AT49F001NT-90TC meets industry standards.
7.What is the process for return or replacement of AT49F001NT-90TC?
All AT49F001NT-90TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001NT-90TC, 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 AT49F001NT-90TC part is unused and in its original packaging.
Return procedure for AT49F001NT-90TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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