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Microchip Technology AT49LV001NT-90JC
- Part No.:
- AT49LV001NT-90JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49LV001NT-90JC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,553
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Product details
Overview
AT49LV001NT-90JC from Microchip Technology (formerly Atmel) is a 1 Mbit (128K × 8) single-supply 3.0–3.6 V Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It features 70 ns read access time, sector-based erase architecture (16 KB boot block + two 8 KB parameter blocks + two main memory blocks), 10-second chip erase, byte-programmable operation (30 µs/byte typical), and hardware data protection. It is commonly deployed in industrial control firmware storage where in-system reprogrammability and boot code integrity are required.
For engineers reviewing the AT49LV001NT-90JC datasheet, AT49LV001NT-90JC pinout, AT49LV001NT-90JC application, or AT49LV001NT-90JC equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative parts - all grounded in the official Atmel 1110C–FLASH–9/03 datasheet and Microchip product documentation.
Technical Context
The AT49LV001NT-90JC implements a standard parallel Flash interface with CE/OE/WE control logic and supports both hardware and software product identification modes. Its internal architecture includes dedicated boot block programming lockout (enabled via six-byte command sequence), DATA polling and toggle-bit status detection, and RESET-pin-based override (12 V) for boot block reprogramming - though RESET is DC on this N(T) variant and not functional for reset assertion.
It uses Atmel's nonvolatile CMOS process to achieve 25 mA active current and 50 µA CMOS standby current over commercial temperature range (0°C to 70°C). The device supports full-chip erase (tEC = 10 s), sector erase (parameter blocks and main memory blocks), and byte-by-byte programming without requiring high-voltage programming signals - all controlled via standardized command sequences written to address 5555H/2AAAH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for small MCU bootloaders and configuration tables. |
| Read Access Time | 90 ns max - compatible with 11 MHz bus timing in legacy 8-bit microcontrollers. |
| Supply Voltage | 3.0 V to 3.6 V only - eliminates need for 5 V or dual-rail power supplies in modern low-voltage designs. |
| Erase Cycle Time | 10 seconds typical for full chip erase - enables field firmware updates without external programmer dependency. |
| Programming Speed | 30 µs/byte typical - allows efficient incremental updates to parameter blocks during runtime. |
| Endurance | 10,000 write/erase cycles - suitable for infrequently updated firmware or calibration data storage. |
| Standby Current | 50 µA CMOS - critical for battery-backed or low-power monitoring applications. |
Pinout & Package
AT49LV001NT-90JC is packaged in a 32-lead Plastic J-leaded Chip Carrier (PLCC), pin-compatible with industry-standard 32-pin PLCC footprint. Pin 1 is marked by corner notch; pin 9 is NC (No Connect) per datasheet Note on page 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 is MSB for 131,072-word space. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path for read, program, and status polling; supports true bidirectional I/O without direction control pin. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - prevents bus contention in shared-memory systems. |
| OE | Output Enable | Active-low output gate; controls data bus tristate independently of CE - enables flexible memory-mapped I/O timing. |
| WE | Write Enable | Active-low write strobe; latches address and data during command sequences and byte programming cycles. |
| RESET* | Reset Input | DC (not functional for reset); tied internally to VCC level - boot block override requires 12 V applied externally during erase/program. |
| VCC | Power Supply | +3.0 V to +3.6 V supply; decoupling capacitor required near pin for stable read/write operation. |
| GND | Ground Reference | Signal and power ground reference; must be low-impedance connection to minimize noise coupling into data lines. |
| NC / DC | No Connect / Don't Connect | Pins 9 (PLCC top view) and 32 (DIP/TSOP) are unconnected - must remain floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB protected region (1C000H–1FFFFH) prevents accidental overwrite of bootloader code; enabled via 6-byte command sequence. |
| Data Polling & Toggle Bit | Real-time status feedback via I/O7 complement or I/O6 toggling - eliminates need for fixed delay timers during programming/erase. |
| Sector Erase Architecture | Independent erasure of two 8 KB parameter blocks and two main memory blocks (32 KB + 64 KB) - enables modular firmware updates. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filter (<15 ns pulse rejection), and control-line inhibit (OE low/CE high/WE high) prevent spurious writes. |
| 3-V-Only Command Set | All operations (read, program, erase, ID) executed using standard 3 V logic levels - no external 12 V programming voltage required. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Retention |
|---|---|
Use Scenario: Storing firmware images and calibration constants in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast 90 ns read access and sector-erase flexibility for field-upgradable firmware modules. Use Value: Enables safe in-system reprogramming without removing the module; boot block lockout ensures bootloader remains intact during parameter updates. |
Use Scenario: Holding certified bootloader and safety-critical startup routines in Class II medical instruments requiring traceable, tamper-resistant firmware storage. IC Role / Device Role / Timing Role: Secure, low-power Flash memory with 50 µA standby current and hardware write protection for regulatory-compliant boot integrity. Use Value: Prevents unauthorized modification of boot code via hardware lockout and 12 V RESET override - supports audit-ready firmware lifecycle management. |
| Automotive Diagnostic Module Memory | Legacy Industrial HMI Configuration Storage |
Use Scenario: Storing diagnostic protocol stacks and vehicle-specific configuration tables in OBD-II compliant tools operating across automotive temperature ranges. IC Role / Device Role / Timing Role: Parallel-interface Flash memory with industrial-grade (-40°C to +85°C) variants available and 10,000-cycle endurance for service-life updates. Use Value: Sector architecture allows independent update of protocol definitions without erasing vehicle ID or calibration data - reduces service downtime. |
Use Scenario: Retaining user-configurable display layouts, I/O mapping, and alarm thresholds in human-machine interface panels used in manufacturing SCADA systems. IC Role / Device Role / Timing Role: Low-cost, pin-compatible replacement for obsolete EPROMs in legacy 8-bit microcontroller-based HMIs. Use Value: Eliminates UV-erasure requirement and socket wear; 3.3 V compatibility simplifies power design versus 5 V EPROMs. |
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 | Same density (1 Mbit), 90 ns access, 3.0–3.6 V supply, but uses different command set and lacks boot block lockout. | No hardware-enforced boot sector protection; relies on software-only safeguards. | Select when boot code integrity is managed at firmware level and pinout compatibility is prioritized. |
| MX29LV001CTTI-90G | 1 Mbit, 90 ns, 3.0–3.6 V, supports boot block protection but with different address mapping (00000H–03FFFH vs. 1C000H–1FFFFH). | Boot block resides at lowest address; incompatible with AT49LV001NT-90JC's high-address boot region. | Select only if redesigning boot vector location and verifying command sequence compatibility. |
Compared with SST39VF010-90-4C-NHE and MX29LV001CTTI-90G, the AT49LV001NT-90JC uniquely provides high-address boot block (1C000H–1FFFFH) with hardware lockout and 12 V RESET override - making it preferred for systems where bootloader location and physical write protection are design-critical.
Availability
AT49LV001NT-90JC is available at Aetrix Electronics and suitable for industrial control firmware storage, medical device bootloader retention, and legacy HMI configuration storage requiring stable component supply and long-term obsolescence support.
Supply support for AT49LV001NT-90JC 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 company specializes in microcontrollers, analog, and nonvolatile memory solutions for industrial, automotive, and consumer markets.
The AT49LV001NT-90JC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for single-supply 3 V embedded systems needing reliable, in-system reprogrammable code storage with robust data integrity features.
FAQ
What is the boot block address range for AT49LV001NT-90JC?
The AT49LV001NT-90JC has its 16 KB boot block located at address range 1C000H to 1FFFFH, as confirmed in the "Notes" section of the datasheet (page 6). This differs from non-T variants (e.g., AT49LV001N), which place the boot block at 00000H–03FFFH. The high-address placement isolates boot code from main application memory regions.
Does AT49LV001NT-90JC support hardware reset functionality?
No - the RESET pin on AT49LV001NT-90JC is designated as DC (Don't Connect) per the datasheet (page 2), meaning it is internally tied off and not functional for reset assertion. However, applying 12 V ± 0.5 V to this pin during erase or program operations enables boot block override, confirming its retained role for protection bypass only.
Can AT49LV001NT-90JC be used as a direct replacement for AT49LV001N-90JC?
No - AT49LV001NT-90JC and AT49LV001N-90JC differ in boot block location (1C000H–1FFFFH vs. 00000H–03FFFH), command-set behavior for boot lockout, and RESET pin functionality. Firmware that assumes low-address boot vectors or uses RESET-based recovery will not operate correctly without modification.
What is the maximum erase time for a single sector in AT49LV001NT-90JC?
The datasheet specifies a maximum full-chip erase time of 10 seconds (tEC), but does not define a separate maximum for individual sector erase. All sector erase operations use the same internal timing engine and complete within the same 10-second window - consistent across parameter blocks and main memory blocks per the "Sector Erase" description on page 4.
How is DATA polling implemented on AT49LV001NT-90JC?
During byte programming, reading the last programmed address returns the complement of the loaded data on I/O7 until completion; once valid, true data appears on all outputs. This allows host firmware to poll I/O7 without fixed delays - a feature explicitly confirmed for AT49BV/LV001(N)(T) devices in the "DATA POLLING" section (page 5) of the datasheet.
AT49LV001NT-90JC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- 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:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49LV001NT-90JC FAQ
1.How can I place an order for AT49LV001NT-90JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV001NT-90JC 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-90JC reliable?
The price and inventory of AT49LV001NT-90JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV001NT-90JC is usually 5 days.
3.What payment methods are accepted for AT49LV001NT-90JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV001NT-90JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV001NT-90JC?
AT49LV001NT-90JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV001NT-90JC 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-90JC?
For technical support, including AT49LV001NT-90JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV001NT-90JC requirements.
6.How does Aetrix verify that AT49LV001NT-90JC is sourced from the original manufacturer or authorized distributors?
All AT49LV001NT-90JC 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-90JC meets industry standards.
7.What is the process for return or replacement of AT49LV001NT-90JC?
All AT49LV001NT-90JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV001NT-90JC, 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-90JC part is unused and in its original packaging.
Return procedure for AT49LV001NT-90JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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