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Microchip Technology AT49LV001NT-90TI
- Part No.:
- AT49LV001NT-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49LV001NT-90TI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,072
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Product details
Overview
AT49LV001NT-90TI from Microchip Technology (formerly Atmel) is a 1 Mbit (128K × 8) single-supply 3.0–3.6 V in-system reprogrammable Flash memory IC used for firmware storage and boot code retention in embedded controllers. It delivers 90 ns read access time, supports sector-based erase (10 s chip erase), offers 16-Kbyte boot block with programmable lockout, and operates across –40°C to +85°C industrial temperature range.
For engineers reviewing the AT49LV001NT-90TI datasheet, AT49LV001NT-90TI pinout, AT49LV001NT-90TI application, or AT49LV001NT-90TI equivalent, this page provides verified technical context, validated pin functions, real-world use cases in boot-critical systems, and confirmed alternative parts with documented functional and application-level differences.
Technical Context
The AT49LV001NT-90TI implements a standard parallel Flash architecture with CE/OE/WE control logic, supporting EPROM-like read timing and command-based byte programming. Its internal program control logic handles automatic pulse generation and DATA polling detection without external high-voltage circuitry.
It features a fixed sector map: one 16-Kbyte boot block (address 1C000H–1FFFFH), two 8-Kbyte parameter blocks, and two main memory blocks (32K and 64K bytes). The boot block lockout is enabled via six-cycle command sequence and overrides only possible with 12 V on RESET - a feature disabled on N(T) variants but explicitly retained in the T-suffix family including this part.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for compact bootloaders and configuration data. |
| Read Access Time | 90 ns max - compatible with 11 MHz bus timing in microcontroller interfaces without wait states. |
| Supply Voltage | 3.0 V to 3.6 V - single 3.3 V rail operation eliminates need for voltage translators or dual supplies. |
| Erase Time | 10 seconds typical for full chip erase - enables field firmware updates within deterministic time budgets. |
| Programming Speed | 30 µs/byte typical - allows rapid patching of small code sections without system downtime. |
| Endurance | 10,000 write/erase cycles - suitable for infrequent firmware upgrades over product lifetime. |
| Standby Current | 50 µA CMOS - critical for low-power modes in battery-backed or energy-sensitive applications. |
Pinout & Package
AT49LV001NT-90TI is supplied in a 32-lead TSOP (Type 1, 8 × 20 mm, package code 32T) with standard parallel Flash pinout. Pin 1 is NC (not connected); RESET is functional and supports 12 V override for boot block reprogramming.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 required for accessing upper 64K block (10000H–1FFFFH). |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; latched on rising edge of WE or CE during programming; tri-stated when CE or OE high. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; controls device selection on shared buses. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention; high-Z state when asserted high during reads. |
| WE | Write Enable | Active-low write strobe; initiates command latching and byte programming; falling edge latches address, rising edge latches data. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot block override - confirmed functional per AT49LV001(N)T datasheet section. |
| VCC / GND | Power Supply | Single 3.0–3.6 V supply; 50 µA standby current enables low-power hold modes in host systems. |
| NC / DC | No Connect / Don't Connect | Pin 1 (TSOP) is NC - must remain unconnected; no pull-up/down or routing required. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16-Kbyte protected region (1C000H–1FFFFH) prevents accidental overwrite of bootloader code; lockout enabled via 6-cycle command sequence. |
| DATA Polling & Toggle Bit | Hardware status feedback via I/O7 complement or I/O6 toggle - eliminates need for timeout-based polling in firmware drivers. |
| Sector-Erase Architecture | Independent erasure of two 8-Kbyte parameter blocks and two main memory blocks (32K/64K) - enables modular firmware updates without full chip erase. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock (OE low/CE high/WE high blocks writes) - prevents spurious writes in noisy environments. |
| 12 V RESET Override | Applying 12 V ±0.5 V to RESET pin during erase/program restores boot block writability even after lockout - unique to T-suffix variants like AT49LV001NT-90TI. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Retention |
|---|---|
|
Use Scenario: Storing boot firmware and calibration tables in programmable logic controllers deployed in factory automation environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic 90 ns read access to initialize ARM Cortex-M4 host MCU before real-time control loop starts. Use Value: Industrial temperature rating (–40°C to +85°C), 50 µA standby current, and hardware write protection ensure reliable startup after power cycling or brownout events. |
Use Scenario: Securing bootloader and regulatory-compliant firmware images in Class II medical instruments requiring traceable, tamper-resistant code storage. IC Role / Device Role / Timing Role: Trusted boot memory with 16-Kbyte lockable boot block holding signed bootloader verification code executed at power-on reset. Use Value: Boot block lockout prevents unauthorized modification; 12 V RESET override allows authorized service reprogramming - meeting IEC 62304 software lifecycle requirements. |
| Telecom Edge Node Configuration | Automotive Infotainment Update Cache |
|
Use Scenario: Holding field-upgradable configuration profiles and protocol stacks in remote telecom base station modules operating in uncontrolled ambient conditions. IC Role / Device Role / Timing Role: Parameter block storage (two 8-Kbyte sectors) for runtime-configurable network settings accessed via SPI-to-parallel bridge interface. Use Value: Sector-erase capability enables zero-downtime profile switching; 10,000-cycle endurance supports multi-year deployment with periodic updates. |
Use Scenario: Caching OTA firmware patches in automotive head units prior to validated installation during vehicle maintenance mode. IC Role / Device Role / Timing Role: High-reliability update staging area where main memory blocks (32K/64K) store candidate firmware images verified against cryptographic signatures. Use Value: Fast 30 µs/byte programming and 10 s chip erase enable rapid patch ingestion; TSOP package supports automated SMT assembly in automotive-grade PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-90-4C-NHE | 1 Mbit, 3.3 V, 90 ns access, same TSOP-32 package; lacks boot block lockout and 12 V RESET override. | No hardware-enforced boot protection; requires external MCU-level locking logic for secure bootloader storage. | Select when cost sensitivity outweighs need for integrated boot security and field-service reprogrammability. |
| MX29LV001CTTI-90G | 1 Mbit, 3.0–3.6 V, 90 ns, TSOP-32; includes boot block lockout but no 12 V RESET override function. | Boot block protection is permanent once enabled; no mechanism for authorized service reprogramming without full chip replacement. | Select for cost-optimized designs where boot code is truly immutable post-deployment and service access is not required. |
Compared with SST39VF010-90-4C-NHE and MX29LV001CTTI-90G, the AT49LV001NT-90TI uniquely combines industrial temperature support, hardware boot lockout, and 12 V RESET override - enabling both field-upgrade security and authorized service recovery in a single component.
Availability
AT49LV001NT-90TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader retention, and telecom edge node configuration requiring stable component supply and long-term obsolescence management.
Supply support for AT49LV001NT-90TI 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 products including the AT49LV series.
The AT49LV001NT-90TI belongs to Atmel's Battery-Voltage™ Flash memory product line, designed specifically for 3.3 V embedded systems requiring reliable, in-system reprogrammable nonvolatile storage with hardware-level data integrity features.
FAQ
What is the operating temperature range for the AT49LV001NT-90TI?
The AT49LV001NT-90TI is rated for industrial operation from –40°C to +85°C. This is confirmed in the "DC and AC Operating Range" table of the datasheet, where the "TI" suffix explicitly denotes the industrial temperature grade. The device maintains full 90 ns read access time and all programming/erase specifications across this full range.
Does the AT49LV001NT-90TI support boot block reprogramming after lockout is enabled?
Yes, the AT49LV001NT-90TI supports boot block reprogramming after lockout via 12 V applied to the RESET pin during erase or program operations - a feature explicitly documented for the (N)T variant family and confirmed functional in the "Boot Block Programming Lockout Override" section of the datasheet.
What package type is used for the AT49LV001NT-90TI?
The AT49LV001NT-90TI uses a 32-lead Plastic Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm), designated as package code 32T. Pin 1 is NC (not connected), and the RESET pin is fully functional - consistent with ordering information tables and top-view diagrams in the datasheet.
How does the AT49LV001NT-90TI indicate completion of a byte programming cycle?
The AT49LV001NT-90TI supports two hardware methods: DATA polling (I/O7 returns complement of loaded data until complete, then true data) and Toggle Bit (I/O6 toggles between 0 and 1 during programming, stops when complete). Both are specified in the "Data Polling Waveforms" and "Toggle Bit Waveforms" sections of the datasheet.
Is the AT49LV001NT-90TI pin-compatible with other AT49LV001 variants?
Yes, all AT49LV001(N)(T) variants - including AT49LV001NT-90TI - share identical pinout, signal definitions, and package footprints across PLCC, PDIP, TSOP, and VSOP packages. The "Pin Configurations" section confirms uniform A0–A16, I/O0–I/O7, CE/OE/WE/RESET/VCC/GND assignment regardless of speed grade or temperature suffix.
AT49LV001NT-90TI 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:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT49LV001NT-90TI FAQ
1.How can I place an order for AT49LV001NT-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV001NT-90TI 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 AT49LV001NT-90TI reliable?
The price and inventory of AT49LV001NT-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV001NT-90TI is usually 5 days.
3.What payment methods are accepted for AT49LV001NT-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV001NT-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV001NT-90TI?
AT49LV001NT-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV001NT-90TI 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 AT49LV001NT-90TI?
For technical support, including AT49LV001NT-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV001NT-90TI requirements.
6.How does Aetrix verify that AT49LV001NT-90TI is sourced from the original manufacturer or authorized distributors?
All AT49LV001NT-90TI 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 AT49LV001NT-90TI meets industry standards.
7.What is the process for return or replacement of AT49LV001NT-90TI?
All AT49LV001NT-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV001NT-90TI, 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 AT49LV001NT-90TI part is unused and in its original packaging.
Return procedure for AT49LV001NT-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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