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Microchip Technology AT49LV001T-90JC
- Part No.:
- AT49LV001T-90JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49LV001T-90JC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,919
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Product details
Overview
AT49LV001T-90JC from Atmel is a 1 Mbit (128K × 8) single-supply 3.0–3.6 V Flash memory IC with 90 ns read access time, sector-based architecture (16 KB boot block, two 8 KB parameter blocks, two main memory blocks), and hardware data protection. It supports in-system reprogramming for embedded firmware storage in microcontroller-based systems.
For engineers reviewing the AT49LV001T-90JC datasheet, AT49LV001T-90JC pinout, AT49LV001T-90JC application, or AT49LV001T-90JC equivalent, this page delivers verified timing specs, PLCC-32 package details, boot-block lockout behavior, byte-programming performance (30 µs/byte typical), and real-world use cases in industrial controller firmware updates and BIOS storage.
Technical Context
The AT49LV001T-90JC implements a standard parallel Flash interface with CE/OE/WE control logic, supporting EPROM-like read operation and command-based erase/program sequences. Its internal program control includes automatic pulse generation and DATA polling for end-of-program detection.
It features a dedicated 16 KB boot block (address range 1C000H–1FFFFH) with optional programming lockout, two 8 KB parameter blocks (1A000H–1BFFFH and 18000H–19FFFH), and two main memory blocks (10000H–17FFFH and 00000H–0FFFFH), enabling flexible firmware partitioning and secure boot code retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for full bootloader + configuration data in resource-constrained embedded systems. |
| Read Access Time | 90 ns max - enables direct interfacing with 8-bit microcontrollers running at ≤10 MHz without wait states. |
| Supply Voltage | 3.0 V to 3.6 V - compatible with standard 3.3 V logic rails and eliminates need for voltage translation. |
| Active Current | 25 mA typical - supports low-power operation during firmware reads in battery-backed or energy-sensitive applications. |
| Standby Current | 50 µA CMOS - ensures minimal quiescent power draw during system sleep modes. |
| Endurance | 10,000 program/erase cycles - validated for field firmware updates over multi-year product lifecycles. |
| Erase Time | 10 seconds max for full chip erase - predictable timing for host-controlled update routines with timeout handling. |
| Byte Programming | 30 µs/byte typical - allows fine-grained patching of configuration registers or small code segments without full-sector overhead. |
Pinout & Package
AT49LV001T-90JC is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package with J-leads, pin-compatible with industry-standard 32-pin PLCC footprints. The package supports reflow and hand-soldering, and is rated for commercial temperature range (0°C to +70°C).
| 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. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path for read/write operations; high-impedance when deselected to prevent bus contention. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access. |
| OE | Output Enable | Active-low output control; used with CE to manage bus sharing and avoid contention during multi-device operation. |
| WE | Write Enable | Active-low write strobe; initiates command latching and programming/erasing when CE is low and OE is high. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-impedance outputs; 12 V override enables boot block reprogramming. |
| VCC | Power Supply | 3.0–3.6 V supply input; internal regulation ensures stable core voltage across operating range. |
| GND | Ground Reference | Signal and power ground reference for all I/O and internal circuitry. |
| DC / NC | No Connect / Don't Connect | Pins 1 (PLCC) and 9 (TSOP) are unconnected - must remain floating per datasheet; no PCB routing required. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | Enables permanent storage of secure boot code (16 KB at 1C000H–1FFFFH) while allowing field updates to parameter and application memory blocks. |
| 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 prevents accidental writes). |
| DATA Polling & Toggle Bit | Allows host MCU to detect program/erase completion without fixed delays - reduces firmware latency and improves update reliability. |
| 12 V RESET Override | Permits reprogramming of locked boot block during recovery procedures - critical for factory reflash and emergency firmware restoration. |
| Single 3.3 V Supply Operation | Eliminates need for 5 V or 12 V programming voltages - simplifies power design and enables direct connection to modern 3.3 V microcontrollers. |
Applications
| Industrial PLC Firmware Storage | Embedded BIOS / Bootloader Storage |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot code, runtime firmware, and user-configurable logic tables; accessed via parallel bus during cold start and field updates. Use Value: Sector protection isolates boot code from accidental overwrite during remote firmware upgrades, ensuring deterministic system recovery after power loss or failed update. | Use Scenario: Holding BIOS initialization code and hardware abstraction layer in medical diagnostic equipment requiring certified boot integrity. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector; provides fast 90 ns read access to enable sub-100 ms system startup. Use Value: Boot block lockout prevents corruption of certified bootloader code, satisfying IEC 62304 safety requirements for locked firmware sections. |
| Consumer Set-Top Box Configuration | Automotive Telematics Module Firmware |
Use Scenario: Storing channel lists, parental controls, and UI language packs in digital TV receivers subject to frequent OTA updates. IC Role / Device Role / Timing Role: Parameter memory partitioned into two 8 KB blocks - one for active settings, one for pending updates - enabling atomic configuration swaps. Use Value: Sector erase capability allows safe over-the-air updates without disrupting current UI operation or risking partial writes. | Use Scenario: Hosting firmware for cellular modem and GNSS stack in vehicle infotainment units requiring AEC-Q100-compliant update resilience. IC Role / Device Role / Timing Role: Dual-main-memory-block layout (32 KB + 64 KB) supports A/B firmware partitioning for fail-safe over-the-air updates. Use Value: 10,000-cycle endurance and 50 µA standby current ensure reliable long-term operation across 15-year automotive service life with periodic firmware patches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV001T-90JC | Wider VCC range (2.7–3.6 V); higher active current (50 mA vs. 25 mA); same PLCC-32 package and pinout. | Supports battery-powered systems down to 2.7 V; less suitable for ultra-low-power standby designs. | Select when wider supply tolerance or legacy 2.7 V compatibility is required; verify thermal budget for sustained 50 mA operation. |
| SST39VF010-90-4C-NHE | Different command set; no 12 V RESET override; 3.3 V only (3.0–3.6 V); 90 ns access; same 1 Mbit density and PLCC-32 footprint. | Lacks boot block lockout override - limits recovery options if boot code becomes corrupted. | Choose for cost-sensitive designs where boot block reprogrammability is not required and SST's simplified command protocol is preferred. |
Compared with AT49BV001T-90JC and SST39VF010-90-4C-NHE, the AT49LV001T-90JC offers lower active power (25 mA vs. 50 mA/30 mA) and unique 12 V RESET-based boot block recovery - making it optimal for power-constrained, safety-critical embedded systems requiring guaranteed firmware restore capability.
Availability
AT49LV001T-90JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded BIOS/bootloader storage, consumer set-top box configuration, and automotive telematics module firmware requiring stable component supply and long-term obsolescence management.
Supply support for AT49LV001T-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
Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and security ICs for embedded systems.
The AT49LV series was designed as a 3.3 V-only Flash memory family targeting cost-sensitive, low-power embedded applications requiring in-system reprogrammability and robust data retention - especially where boot code integrity and field-upgrade capability are essential.
FAQ
What is the memory organization of the AT49LV001T-90JC?
The AT49LV001T-90JC contains 1 Mbit (131,072 × 8) of Flash memory, organized as 128K words × 8 bits. Its physical address space spans 00000H–1FFFFH, with the boot block located at 1C000H–1FFFFH, parameter blocks at 1A000H–1BFFFH and 18000H–19FFFH, and main memory blocks at 10000H–17FFFH and 00000H–0FFFFH. This layout is fixed and confirmed in the AT49LV001T-90JC datasheet section "Block Diagram" and "Command Definitions".
Does the AT49LV001T-90JC support 12 V programming voltage?
No, the AT49LV001T-90JC operates exclusively from a single 3.0–3.6 V supply for both read and write operations. However, a 12 V ±0.5 V signal applied to the RESET pin enables override of the boot block programming lockout during erase or program cycles - this is not a programming voltage but a dedicated recovery feature. The AT49LV001T-90JC itself requires no external high-voltage source.
What is the function of the DC and NC pins on the AT49LV001T-90JC PLCC package?
In the AT49LV001T-90JC PLCC-32 package, Pin 1 is designated "DC" (Don't Connect) and must remain unconnected on the PCB. Pin 9 is labeled "NC" (No Connect) and is internally unused. Both pins are electrically isolated and must be left floating - routing traces or applying pull-ups/pull-downs violates the AT49LV001T-90JC datasheet specification and may cause undefined behavior.
How does the boot block lockout feature work on the AT49LV001T-90JC?
The AT49LV001T-90JC boot block (16 KB, 1C000H–1FFFFH) can be permanently protected via a six-cycle command sequence (5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → 5555H/40H). Once enabled, programming/erasure is blocked for input voltages ≤5.5 V. The AT49LV001T-90JC retains the 12 V RESET override capability to re-enable writes during recovery - a feature absent in N-suffix variants.
Can the AT49LV001T-90JC be used in industrial temperature applications?
No - the AT49LV001T-90JC is specified only for the commercial temperature range (0°C to +70°C), as indicated by the "C" suffix in its ordering code. For industrial applications (−40°C to +85°C), the correct variant is AT49LV001T-90JI (PLCC package, industrial grade). Using the AT49LV001T-90JC outside its rated temperature range risks data retention failure, timing violations, and premature endurance degradation.
AT49LV001T-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)
AT49LV001T-90JC FAQ
1.How can I place an order for AT49LV001T-90JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV001T-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 AT49LV001T-90JC reliable?
The price and inventory of AT49LV001T-90JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV001T-90JC is usually 5 days.
3.What payment methods are accepted for AT49LV001T-90JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV001T-90JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV001T-90JC?
AT49LV001T-90JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV001T-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 AT49LV001T-90JC?
For technical support, including AT49LV001T-90JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV001T-90JC requirements.
6.How does Aetrix verify that AT49LV001T-90JC is sourced from the original manufacturer or authorized distributors?
All AT49LV001T-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 AT49LV001T-90JC meets industry standards.
7.What is the process for return or replacement of AT49LV001T-90JC?
All AT49LV001T-90JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV001T-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 AT49LV001T-90JC part is unused and in its original packaging.
Return procedure for AT49LV001T-90JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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