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Microchip Technology AT49LV001NT-90PC
- Part No.:
- AT49LV001NT-90PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49LV001NT-90PC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,429
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Product details
Overview
AT49LV001NT-90PC from Atmel is a 1 Mbit (128K × 8) single-supply 3.0–3.6 V Flash memory IC used for nonvolatile program/data storage in embedded microcontroller systems. It delivers 70 ns read access time, 10-second chip erase, byte-programmable architecture with sector protection, and operates across commercial temperature range (0°C to 70°C) in 32-pin PDIP package.
For engineers reviewing the AT49LV001NT-90PC datasheet, AT49LV001NT-90PC pinout, AT49LV001NT-90PC application, or AT49LV001NT-90PC equivalent, key selection criteria include boot-block lockout capability, DC/AC timing compliance at 3.3 V, hardware data protection features, and compatibility with standard EPROM-style bus interface protocols.
Technical Context
The AT49LV001NT-90PC implements a sector-organized Flash architecture with one 16-Kbyte boot block (address range 1C000H–1FFFFH), two 8-Kbyte parameter blocks, and two main memory blocks (32K and 64K bytes). Its command-set-driven operation uses standard CE/OE/WE control lines and supports software-based chip/sector erase and byte programming without external high-voltage supplies.
It integrates DATA polling and toggle-bit status detection for end-of-program/erase verification, hardware VCC-sense and noise filtering for inadvertent-write prevention, and RESET-triggered boot-block override (12 V on RESET pin) - though RESET is DC-connected and not functional for reset assertion in this N(T) variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits |
| Supply Voltage | 3.0 V to 3.6 V - enables direct interfacing with 3.3 V logic systems without level translation |
| Read Access Time | 90 ns max - meets timing requirements for 11 MHz bus operation with standard microprocessor interfaces |
| Erase Cycle Time | 10 seconds typical for full-chip erase - deterministic internal timing eliminates need for external clocks or timers |
| Byte Programming Time | 30 µs typical - supports rapid field updates of small firmware patches or configuration data |
| Endurance | 10,000 write/erase cycles - validated for long-term use in firmware update and data logging applications |
| Standby Current | 50 µA CMOS - enables ultra-low-power retention in battery-backed or energy-constrained systems |
Pinout & Package
AT49LV001NT-90PC is packaged in a 32-pin Plastic Dual In-line Package (PDIP), 0.600" wide, with through-hole mounting. Pin 1 is index corner; pins 1 and 32 are NC (no connect) per datasheet specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing space |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface compatible with standard microprocessor data buses |
| CE | Chip Enable | Active-low chip select enabling memory access only when asserted |
| OE | Output Enable | Active-low output gate controlling data bus drive during read operations |
| WE | Write Enable | Active-low control signal initiating byte programming or command latching |
| RESET* | Reset Input | DC-connected pin (not functional for reset); used only for boot-block override at 12 V |
| VCC | Power Supply | Single 3.0–3.6 V supply powering all internal logic and memory array |
| GND | Ground Reference | Common return path for power and signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16-Kbyte protected region (1C000H–1FFFFH) prevents accidental overwrite of critical boot code |
| Sector Erase Flexibility | Independent erasure of two 8-Kbyte parameter blocks and two main memory blocks enables modular firmware updates |
| Hardware Data Protection | VCC sense, OE/CE/WE inhibit logic, and 15 ns noise filter prevent spurious writes during power transients or EMI events |
| Status Detection | DATA polling (I/O7 complement) and toggle-bit (I/O6) provide real-time, software-transparent program/erase completion signaling |
| 3.3 V System Compatibility | No external 5 V or 12 V required for normal operation - simplifies power design and reduces BOM count |
Applications
| Embedded Bootloader Storage | Firmware Configuration Storage |
|---|---|
Use Scenario: Storing initial boot code for ARM Cortex-M or 8051-based microcontrollers during cold start. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to reset vector address space; accessed via standard address/data bus with CE/OE/WE handshaking. Use Value: Boot block lockout ensures bootloader integrity across thousands of field updates while allowing parameter block reprogramming for calibration data. | Use Scenario: Holding device-specific configuration parameters (e.g., sensor offsets, network IDs, calibration coefficients) in industrial PLC modules. IC Role / Device Role / Timing Role: Parameter block Flash memory updated infrequently via host MCU using sector-erase + byte-program sequence. Use Value: Two independent 8-Kbyte parameter blocks allow A/B versioning - one active while the other is updated - ensuring zero-downtime configuration changes. |
| Legacy EPROM Replacement | Industrial HMI Firmware Storage |
Use Scenario: Direct drop-in replacement for obsolete 27C010 EPROMs in legacy test equipment and telecom line cards. IC Role / Device Role / Timing Role: Pin-compatible 32-pin DIP Flash memory operating at same 90 ns access speed and identical CE/OE/WE protocol. Use Value: Eliminates UV erasers and programmers; enables in-system reprogramming via existing JTAG or UART bootloader infrastructure. | Use Scenario: Storing GUI assets and application firmware for touch-based HMIs in factory automation panels. IC Role / Device Role / Timing Role: Main memory block (64K-byte) stores compressed firmware images; accessed sequentially during boot via DMA-capable controller. Use Value: 10,000-cycle endurance supports over-the-air firmware upgrades every 3 months for 8+ years without wear-out concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV001NT-90PC | 2.7–3.6 V supply range; includes BV-grade process for wider voltage tolerance | Supports mixed 2.7 V/3.3 V system rails; suitable for battery-powered designs with voltage droop | Select when system VCC may dip below 3.0 V during brown-out conditions |
| AM29LV001BT-90EC | 3.0–3.6 V supply; 90 ns access; 32-pin TSOP package (not PDIP) | Surface-mount only; lacks boot-block lockout; uses AMD command set (not Atmel) | Choose only if board layout supports TSOP and firmware already implements AMD-compatible command sequences |
Compared with AT49BV001NT-90PC and AM29LV001BT-90EC, the AT49LV001NT-90PC offers tighter voltage regulation (3.0–3.6 V only), guaranteed boot-block lockout, and PDIP packaging for prototyping - making it optimal for 3.3 V embedded designs requiring field-upgradable secure boot code.
Availability
AT49LV001NT-90PC is available at Aetrix Electronics and suitable for embedded bootloader storage, industrial firmware configuration, legacy EPROM replacement, and HMI application firmware requiring stable component supply and long-term obsolescence management.
Supply support for AT49LV001NT-90PC 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 AT49LV series was designed specifically for 3.3 V embedded systems requiring in-system reprogrammability, robust data retention, and hardware-level protection against unintended writes - targeting cost-sensitive, high-reliability firmware storage.
FAQ
What is the memory organization of the AT49LV001NT-90PC?
The AT49LV001NT-90PC contains 1 Mbit (131,072 × 8) of Flash memory organized as 128K words × 8 bits. Its physical address space is segmented into one 16-Kbyte boot block (1C000H–1FFFFH), two 8-Kbyte parameter blocks, and two main memory blocks (32K and 64K bytes), enabling flexible firmware partitioning and update strategies.
Does the AT49LV001NT-90PC support hardware reset functionality?
No - the RESET pin on the AT49LV001NT-90PC is DC-connected and not functional for asserting reset. It serves solely as a 12 V input for overriding boot-block lockout during programming. Standard reset behavior must be managed externally by the host system's reset controller or processor.
Can the AT49LV001NT-90PC be used as a direct replacement for 27C010 EPROMs?
Yes - the AT49LV001NT-90PC is pin-compatible with 27C010 in 32-pin PDIP and matches its 90 ns access time and 128K × 8 organization. Unlike EPROMs, it requires no UV erasure and supports in-system reprogramming via standard CE/OE/WE control, making it a true drop-in upgrade for legacy designs.
How does boot block lockout work on the AT49LV001NT-90PC?
The AT49LV001NT-90PC allows permanent write protection of its 16-Kbyte boot block (1C000H–1FFFFH) via a six-cycle command sequence. Once enabled, programming or erasing that region is blocked at ≤5.5 V; only applying 12 V to the RESET pin permits override - ensuring bootloader integrity across field updates.
What are the valid operating temperature ranges for the AT49LV001NT-90PC?
The AT49LV001NT-90PC is specified for commercial temperature operation from 0°C to 70°C. It is not rated for industrial (-40°C to +85°C) use - for extended temperature applications, consider the AT49LV001NT-90PI or AT49BV001NT-90JI variants instead.
AT49LV001NT-90PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49LV001NT-90PC FAQ
1.How can I place an order for AT49LV001NT-90PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV001NT-90PC 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-90PC reliable?
The price and inventory of AT49LV001NT-90PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV001NT-90PC is usually 5 days.
3.What payment methods are accepted for AT49LV001NT-90PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV001NT-90PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV001NT-90PC?
AT49LV001NT-90PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV001NT-90PC 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-90PC?
For technical support, including AT49LV001NT-90PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV001NT-90PC requirements.
6.How does Aetrix verify that AT49LV001NT-90PC is sourced from the original manufacturer or authorized distributors?
All AT49LV001NT-90PC 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-90PC meets industry standards.
7.What is the process for return or replacement of AT49LV001NT-90PC?
All AT49LV001NT-90PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV001NT-90PC, 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-90PC part is unused and in its original packaging.
Return procedure for AT49LV001NT-90PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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