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Microchip Technology AT49LV001NT-90TC
- Part No.:
- AT49LV001NT-90TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49LV001NT-90TC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,262
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Product details
Overview
AT49LV001NT-90TC from Microchip Technology (formerly Atmel) is a 1 Mbit (128K × 8) single-supply 3.0–3.6 V in-system reprogrammable Flash memory with 90 ns read access time, sector-based erase architecture (16 KB boot block + two 8 KB parameter blocks + two main memory blocks), and hardware data protection. It is used for firmware storage and boot code retention in embedded microcontroller systems requiring nonvolatile, field-upgradable memory.
For engineers reviewing the AT49LV001NT-90TC datasheet, AT49LV001NT-90TC pinout, AT49LV001NT-90TC application, or AT49LV001NT-90TC equivalent, this page provides verified technical context, real-world use cases, validated alternatives, and supply-chain support for industrial and commercial embedded designs.
Technical Context
The AT49LV001NT-90TC implements a standard parallel Flash interface with CE/OE/WE control logic, supporting EPROM-like read operation and command-based byte programming and sector/chip erase. Its internal program controller handles timing, eliminating external high-voltage generators.
It features a dedicated 16 KB boot block (address range 1C000H–1FFFFH) with optional programming lockout, two 8 KB parameter blocks, and two main memory blocks (32 KB and 64 KB). The RESET pin supports both reset functionality and 12 V override for boot block reprogramming - though the "N" suffix variant excludes RESET functionality, the "T" suffix confirms RESET is present and functional per datasheet Section 3 and Pin Configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits), organized as 128K words × 8 bits - sufficient for compact boot firmware and configuration data in resource-constrained systems. |
| Supply Voltage | 3.0 V to 3.6 V only - compatible with modern low-voltage 3.3 V logic domains without level-shifting. |
| Read Access Time | 90 ns max - enables direct connection to microcontrollers with ≤11 MHz bus timing without wait states. |
| Byte Programming Time | 30 µs typical - allows rapid field updates of small configuration patches without system interruption. |
| Erase Cycle Time | 10 seconds max for full chip erase - predictable, bounded update latency suitable for maintenance-mode firmware upgrades. |
| End-of-Operation Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Write Endurance | 10,000 program/erase cycles - supports long-term field deployment with periodic firmware updates. |
Pinout & Package
AT49LV001NT-90TC is packaged in a 32-lead Plastic Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm), pin-compatible with industry-standard 32-pin parallel Flash footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 required for accessing upper 64 KB block (10000H–1FFFFH). |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path for read, program, and identification operations; TTL-compatible I/O levels. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; enables bus contention control. |
| OE | Output Enable | Active-low output gate; places I/O pins in high-impedance state when high, allowing shared bus operation. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming cycles. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot block override (per datasheet Section 3). |
| VCC | Power Supply | +3.0 V to +3.6 V supply; powers core logic and I/O buffers; requires local 0.1 µF decoupling. |
| GND | Ground Reference | Signal and power ground reference; must be low-inductance connection to minimize noise during erase/program. |
| NC | No Connect | Pin 16 in TSOP package - must remain unconnected; not internally bonded. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB protected region (1C000H–1FFFFH) prevents accidental overwrite of critical boot code; lock enabled via 6-cycle command sequence. |
| 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). |
| Sector Erase Flexibility | Independent erasure of two 8 KB parameter blocks and two main memory blocks (32 KB & 64 KB), enabling modular firmware partitioning. |
| Low-Power Operation | 25 mA active current and 50 µA CMOS standby current - suitable for battery-backed or energy-sensitive embedded applications. |
| Software Product Identification | Manufacturer code 1FH and device code 04H readable via software command (5555H/2AAAH/90H), enabling automatic algorithm selection in programmers. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing immutable bootloader and field-upgradable application firmware in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile parallel Flash memory providing fast 90 ns read access for CPU instruction fetch and secure boot block protection against corruption. Use Value: Ensures deterministic boot behavior and safe over-the-air updates via sector-erase isolation - parameter blocks retain calibration data while main memory receives new control logic. |
Use Scenario: Holding certified boot code and regulatory-compliant configuration data in Class II medical instruments requiring traceable firmware revisions. IC Role / Device Role / Timing Role: Trusted boot memory with hardware-enforced write protection on the 16 KB boot sector (1C000H–1FFFFH) and DATA polling for reliable programming verification. Use Value: Meets IEC 62304 requirements for firmware integrity by preventing unauthorized modification of boot code while enabling auditable parameter updates in separate sectors. |
| Telecom Edge Node Configuration | Automotive Diagnostic Module Storage |
Use Scenario: Storing network stack parameters, encryption keys, and device-specific MAC addresses in remote telecom access points with infrequent but critical firmware patches. IC Role / Device Role / Timing Role: Field-reprogrammable Flash with 10,000-cycle endurance and 3.0–3.6 V single supply - simplifies power design and eliminates external voltage translators. Use Value: Enables zero-touch remote updates using sector erase: parameter blocks updated independently without disturbing operational firmware in main memory blocks. |
Use Scenario: Retaining diagnostic trouble codes (DTCs), calibration tables, and ECU communication protocols in automotive OBD-II modules operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade parallel Flash with -40°C to +85°C temperature rating and hardware RESET-driven boot block override for service-mode reprogramming. Use Value: Supports dealership-level firmware recovery: applying 12 V to RESET pin unlocks protected boot sector during service procedures without board removal. |
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 | 90 ns access, 3.3 V-only, same 1 Mbit density and 32-pin TSOP package; lacks RESET pin and boot block lockout override. | No 12 V RESET override - boot sector protection is permanent once enabled; unsuitable for service-recoverable designs. | Select when boot code is truly immutable and cost sensitivity outweighs field-service flexibility. |
| MX29LV001CTTI-90G | 90 ns access, 3.0–3.6 V, 1 Mbit, TSOP32; includes RESET pin but uses different command set and lacks documented boot block lockout override at 12 V. | Boot protection relies on software lock only; no guaranteed hardware-level unlock mechanism like AT49LV001NT-90TC's 12 V RESET feature. | Choose for drop-in replacement where existing SST39-style command compatibility is required and RESET-assisted recovery is not mandated. |
Compared with SST39VF010-90-4C-NHE and MX29LV001CTTI-90G, the AT49LV001NT-90TC uniquely combines verified 12 V RESET-driven boot block override with sector-erase granularity and hardware VCC-sense protection - making it the only option among the three qualified for safety-critical field recovery workflows.
Availability
AT49LV001NT-90TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and telecom edge node configuration requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49LV001NT-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 products including the AT49LV series, ensuring long-term documentation, reliability data, and obsolescence mitigation.
The AT49LV001NT-90TC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for 3 V embedded systems needing in-system reprogrammability, robust data retention, and hardware-enforced security for boot code integrity.
FAQ
What is the function of the RESET pin on the AT49LV001NT-90TC?
The RESET pin on the AT49LV001NT-90TC serves dual functions: (1) as an active-low reset signal that halts ongoing operations and places I/O pins in high-impedance state, and (2) as a 12 V override input to temporarily disable boot block programming lockout during chip/sector erase or byte programming. This capability is explicitly confirmed for the "T" suffix variant in the datasheet's Boot Block Programming Lockout Override section and distinguishes AT49LV001NT-90TC from "N(T)" variants lacking RESET.
Does the AT49LV001NT-90TC support 2.7 V operation?
No, the AT49LV001NT-90TC does not support 2.7 V operation. Per the DC Operating Range table, the "LV" prefix denotes 3.0–3.6 V only (unlike "BV" variants rated for 2.7–3.6 V). The ordering information table on page 13 explicitly lists AT49LV001T-90TC under VCC = 3.0 V to 3.6 V, and absolute minimum VCC is specified as 3.0 V in all AC/DC characteristics.
What is the exact address range of the boot block in the AT49LV001NT-90TC?
The boot block in the AT49LV001NT-90TC occupies address range 1C000H to 1FFFFH (16 KB), as confirmed in Note 2 on page 6 and the AT49BV/LV001(N)T memory map on page 2. This differs from non-"T" variants (e.g., AT49LV001N), whose boot block resides at 00000H–03FFFH. The "T" suffix directly correlates to this relocated boot sector layout.
How many program/erase cycles is the AT49LV001NT-90TC rated for?
The AT49LV001NT-90TC is rated for a typical 10,000 program/erase cycles, as stated in the Features section and confirmed in the Device Operation section. This endurance applies to all sectors - boot block, parameter blocks, and main memory blocks - and is validated across the commercial (0°C to 70°C) and industrial (-40°C to +85°C) temperature ranges specified for the -90TC variant.
Is the AT49LV001NT-90TC pin-compatible with other 32-pin TSOP Flash memories?
Yes, the AT49LV001NT-90TC uses a standard 32-lead TSOP (Type 1, 8 × 20 mm) footprint with industry-common pinout: A0–A16, I/O0–I/O7, CE, OE, WE, RESET, VCC, GND, and NC. It matches the physical and signal mapping of equivalents like SST39VF010 and MX29LV001C, enabling PCB-level substitution - though command-set and feature differences (e.g., RESET override) require firmware validation.
AT49LV001NT-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:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT49LV001NT-90TC FAQ
1.How can I place an order for AT49LV001NT-90TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV001NT-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 AT49LV001NT-90TC reliable?
The price and inventory of AT49LV001NT-90TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV001NT-90TC is usually 5 days.
3.What payment methods are accepted for AT49LV001NT-90TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV001NT-90TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV001NT-90TC?
AT49LV001NT-90TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV001NT-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 AT49LV001NT-90TC?
For technical support, including AT49LV001NT-90TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV001NT-90TC requirements.
6.How does Aetrix verify that AT49LV001NT-90TC is sourced from the original manufacturer or authorized distributors?
All AT49LV001NT-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 AT49LV001NT-90TC meets industry standards.
7.What is the process for return or replacement of AT49LV001NT-90TC?
All AT49LV001NT-90TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV001NT-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 AT49LV001NT-90TC part is unused and in its original packaging.
Return procedure for AT49LV001NT-90TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LV001NT-90TC Tags
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