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Microchip Technology AT49LV001-12JI
- Part No.:
- AT49LV001-12JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49LV001-12JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49LV001-12JI 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 delivers 120 ns read access time, 10-second chip erase, byte-programmable architecture with sector protection, and operates across industrial temperature range (−40°C to +85°C) in a 32-lead PLCC package.
For engineers reviewing the AT49LV001-12JI datasheet, AT49LV001-12JI pinout, AT49LV001-12JI application, or AT49LV001-12JI equivalent, this page provides verified technical context, validated pin functions, real-world use cases in boot firmware and parameter storage, and confirmed alternative parts with documented functional and application-level differences.
Technical Context
The AT49LV001-12JI implements a sector-organized Flash architecture with one 16-Kbyte boot block (address 00000H–03FFFH), two 8-Kbyte parameter blocks, and two main memory blocks (32K/64K bytes). It uses standard CE/OE/WE control logic compatible with EPROM interfaces and supports software command sequences for erase and programming without high-voltage inputs.
It features hardware data protection via VCC sense (<1.8 V inhibits programming), noise filtering on WE/CE (<15 ns pulses ignored), and dual detection methods-DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling)-to confirm end-of-program or erase cycles. The RESET pin enables system reset and, at 12 V, overrides boot block lockout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - supports full firmware image or configuration storage in resource-constrained systems. |
| Read Access Time | 120 ns max - meets timing requirements for 8-bit microcontrollers running at ≤8 MHz with wait-state-free operation. |
| Supply Voltage | 3.0 V to 3.6 V - compatible with 3.3 V logic rails and eliminates need for separate 5 V programming supply. |
| Erase Cycle Time | 10 seconds typical for full chip erase - enables field firmware updates with predictable downtime. |
| Byte Programming Time | 30 µs typical - allows fine-grained patching of configuration or calibration data without bulk rewrites. |
| Endurance | 10,000 program/erase cycles - suitable for applications requiring infrequent but reliable field updates over product lifetime. |
| Standby Current | 50 µA CMOS - minimizes power draw in sleep-mode embedded devices such as industrial sensors or battery-backed controllers. |
Pinout & Package
AT49LV001-12JI is housed in a 32-lead Plastic Leaded Chip Carrier (PLCC) package with J-leads, pin-compatible with industry-standard 32-pin PLCC footprints. Pin 1 is index corner, and pin 9 is NC (No Connect) per datasheet Figure 1 (PLCC Top View).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 required for access beyond 64K boundary. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read/write operations; high-impedance when CE or OE is deasserted. |
| 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 bus. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during multi-device reads. |
| WE | Write Enable | Active-low write strobe; latches address/data during programming/erase command sequences; must be high for read mode. |
| RESET | Reset Input | Active-low system reset; halts ongoing operations and forces high-impedance outputs; 12 V input enables boot block override. |
| VCC | Power Supply | 3.0–3.6 V main supply; internal regulation ensures stable core voltage across operating range. |
| GND | Ground | Reference return path for all I/O and internal circuitry; requires low-impedance PCB connection for noise immunity. |
| DC / NC | No Connect | Pin 9 is designated DC (Don't Connect); floating or tied to GND/VCC has no functional effect and is not recommended. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16-Kbyte protected region (00000H–03FFFH) prevents accidental overwrite of bootloader code; enabled via 6-byte command sequence. |
| Software Command Architecture | Standardized 4- to 6-cycle command sequences (e.g., AA/55/A0 for byte program) eliminate need for external high-voltage generators. |
| Data Polling & Toggle Bit | Dual, hardware-verified status reporting: I/O7 complement indicates program completion; I/O6 toggling confirms erase progress - no timer polling required. |
| Sector Erase Flexibility | Independent erasure of parameter blocks (8 KB each) and main memory blocks (32K/64K) enables selective firmware updates without full chip erase. |
| Hardware Data Protection | VCC sense, noise filtering, and control-line interlock (OE high/CE high/WE high inhibits writes) prevent spurious programming during power transients or EMI events. |
Applications
| Industrial PLC Firmware Storage | Medical Device Calibration Data |
|---|---|
|
Use Scenario: Storing boot firmware and runtime configuration in programmable logic controllers deployed in factory automation environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast 120 ns read access enabling deterministic boot timing; boot block lockout secures critical startup routines. Use Value: Ensures firmware integrity across 10,000+ field updates and maintains operation at −40°C to +85°C without external voltage translation or buffering. |
Use Scenario: Retaining calibrated sensor offsets and safety-critical operational parameters in portable diagnostic equipment requiring long-term data retention and regulatory traceability. IC Role / Device Role / Timing Role: Parameter block (8-Kbyte × 2) stores user-modifiable calibration tables; sector-erase capability allows safe field recalibration without affecting main application code. Use Value: Enables ISO 13485-compliant data persistence with 50 µA standby current, reducing battery load in battery-powered handheld units. |
| Automotive Body Control Module | Telecom Remote Node Configuration |
|
Use Scenario: Holding vehicle-specific configuration (e.g., door lock logic, lighting profiles) in body control modules where EEPROM endurance is insufficient for frequent reprogramming. IC Role / Device Role / Timing Role: Main memory block (32K/64K) stores modifiable feature sets; RESET pin integration simplifies system-level reset coordination during CAN-based firmware updates. Use Value: Delivers 10,000-cycle endurance and 3.0–3.6 V compatibility with automotive 3.3 V domains, eliminating level-shifting components. |
Use Scenario: Storing network provisioning data, encryption keys, and firmware version metadata in remote base station nodes subject to periodic over-the-air updates. IC Role / Device Role / Timing Role: Boot block holds secure boot loader; parameter blocks store volatile configuration; DATA polling ensures update atomicity under intermittent power conditions. Use Value: Reduces update window by 70% vs. full-chip erase (sector erase only) and guarantees data validity via hardware status flags instead of software timeouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV001-12JI | 2.7–3.6 V supply range; includes BV variant's wider voltage tolerance and same 120 ns timing. | Supports legacy 2.7 V systems; higher active current (25 mA vs. 20 mA typical for LV) but identical sector architecture and command set. | Select when interfacing with mixed-voltage boards or migrating from older 2.7 V designs; verify VCC stability margins. |
| SST39VF010-70-4C-NHE | 70 ns access time; 3.0–3.6 V; 1 Mbit; PLCC-32; supports CFI query and uniform 4-KB sectors (vs. AT49LV001's asymmetric 16K/8K/32K/64K layout). | Better suited for applications requiring frequent small-sector updates; lacks boot block lockout but offers JEDEC-standard CFI identification. | Prefer for new designs needing standardized sector management or CFI-based auto-detection; avoid if boot code protection is mandatory. |
Compared with AT49BV001-12JI and SST39VF010-70-4C-NHE, the AT49LV001-12JI uniquely balances industrial temperature support, boot block security, and 3.3 V compatibility without sacrificing sector flexibility - making it optimal for legacy-anchored embedded systems where firmware integrity is non-negotiable.
Availability
AT49LV001-12JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device calibration data retention, and automotive body control module configuration requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49LV001-12JI 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 continues to manufacture, support, and qualify legacy Atmel Flash products including the AT49LV series for industrial and automotive applications.
The AT49LV001-12JI belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for 3 V–only embedded systems requiring reliable in-system reprogrammability without high-voltage programming circuitry.
FAQ
What is the maximum operating temperature range for the AT49LV001-12JI?
The AT49LV001-12JI is rated for industrial temperature operation from −40°C to +85°C, as confirmed by its ordering suffix "I" and the DC/AC Operating Range table in the datasheet. This makes it suitable for deployment in harsh environments such as factory floors, vehicle engine compartments, and outdoor telecom enclosures where thermal stability is critical. The AT49LV001-12JI maintains full specification compliance-including 120 ns read access and 50 µA standby current-across this entire range.
Does the AT49LV001-12JI require a high-voltage programming supply?
No, the AT49LV001-12JI operates with a single 3.0–3.6 V supply for both read and write operations. All programming and erase functions are executed using standard 3 V logic-level command sequences (e.g., 5555H/AAH, 2AAAH/55H), eliminating the need for external 12 V or 5 V programming voltages. The AT49LV001-12JI achieves this through on-chip charge pumps and internal voltage regulation, simplifying board design and reducing BOM cost.
How is boot block protection enabled on the AT49LV001-12JI?
Boot block protection on the AT49LV001-12JI is enabled via a six-cycle software command sequence: write AAH to 5555H, 55H to 2AAAH, 80H to 5555H, AAH to 5555H, 55H to 2AAAH, then 40H to 5555H. Once activated, the 16-Kbyte boot block (00000H–03FFFH) becomes permanently write-protected at ≤5.5 V. The AT49LV001-12JI supports RESET pin override at 12 V to temporarily disable protection for recovery purposes.
What package type does the AT49LV001-12JI use, and is it pin-compatible with other variants?
The AT49LV001-12JI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package (package code "J"). It is pin-compatible with all other AT49LV/BV001 variants in the same package type-including AT49LV001-70JI, AT49BV001-12JI, and AT49LV001N-12JI-as confirmed by identical pin configurations in the datasheet's PLCC Top View diagram and Ordering Information tables. Pin 9 is NC and must remain unconnected.
Can the AT49LV001-12JI be used as a direct replacement for the AT49BV001-12JI?
The AT49LV001-12JI and AT49BV001-12JI share identical timing (120 ns), packaging (PLCC-32), pinout, command set, and sector architecture-but differ in supply voltage range: AT49LV001-12JI requires 3.0–3.6 V, while AT49BV001-12JI supports 2.7–3.6 V. Substitution is electrically safe if the host system's VCC remains ≥3.0 V; however, AT49LV001-12JI should not be used in 2.7–2.99 V systems. Both parts maintain full functional equivalence above 3.0 V.
AT49LV001-12JI 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:
- 120 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49LV001-12JI FAQ
1.How can I place an order for AT49LV001-12JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV001-12JI 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 AT49LV001-12JI reliable?
The price and inventory of AT49LV001-12JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV001-12JI is usually 5 days.
3.What payment methods are accepted for AT49LV001-12JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV001-12JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV001-12JI?
AT49LV001-12JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV001-12JI 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 AT49LV001-12JI?
For technical support, including AT49LV001-12JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV001-12JI requirements.
6.How does Aetrix verify that AT49LV001-12JI is sourced from the original manufacturer or authorized distributors?
All AT49LV001-12JI 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 AT49LV001-12JI meets industry standards.
7.What is the process for return or replacement of AT49LV001-12JI?
All AT49LV001-12JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV001-12JI, 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 AT49LV001-12JI part is unused and in its original packaging.
Return procedure for AT49LV001-12JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LV001-12JI Tags
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