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Microchip Technology AT49LV1025-70JC
- Part No.:
- AT49LV1025-70JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT49LV1025-70JC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,653
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Product details
Overview
AT49LV1025-70JC from Microchip Technology (formerly Atmel) is a 1-Mbit (64K × 16) 3.0–3.6V single-supply Flash memory IC used for nonvolatile code/data storage in embedded boot systems. It features 55 ns read access, 8K-word boot block with hardware lockout, and PLCC-44 packaging. It supports word-by-word programming (20 µs/word) and chip/main-memory erase (≤10 s), deployed in microcontroller-based firmware update subsystems.
For engineers reviewing the AT49LV1025-70JC datasheet, AT49LV1025-70JC pinout, AT49LV1025-70JC application, or AT49LV1025-70JC equivalent, key selection criteria include boot-sector write protection, 3V-only operation, PLCC-44 mechanical compatibility, and verified 10,000 program/erase cycles under commercial temperature range (0°C to 70°C).
Technical Context
This device implements a 16-bit parallel interface with asynchronous control via CE/OE/WE signals and uses command-register-based operations (e.g., 6-cycle Chip Erase at 5555H/AA → 2AAAH/55 → 5555H/80 → ...). Its architecture separates main memory (56K words) from an optional 8K-word boot block (0000H–1FFFH), where lockout activation permanently disables erase/program access to that region.
Hardware data protection includes VCC sense (<1.8V inhibits programming), noise filtering (<15 ns pulses ignored on WE/CE), and active-level inhibition (OE low, CE high, or WE high blocks writes). End-of-operation detection is supported via Data Polling (I/O7 complement) and Toggle Bit (I/O6 toggling) mechanisms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (64K × 16 organization) |
| Read Access Time | 70 ns - defines maximum clock-to-data delay in 3V bus interfaces |
| Supply Voltage | 3.0 V to 3.6 V - enables direct connection to 3.3V logic without level shifters |
| Boot Block Size | 8K words (0000H–1FFFH) - isolates secure boot code from field updates |
| Program Cycle Time | 20 µs/word typical - enables fast incremental firmware patching |
| Erase Cycle Time | ≤10 seconds (chip or main memory) - supports rapid full-image reprogramming |
| Endurance | 10,000 program/erase cycles - qualifies for long-life industrial firmware storage |
| Operating Temperature | 0°C to 70°C - validated for commercial-grade embedded control applications |
Pinout & Package
AT49LV1025-70JC is housed in a 44-lead Plastic Leaded Chip Carrier (PLCC) package with J-leads, 16.5 mm × 16.5 mm body size, and pin 1 corner notch marking. Pin layout follows JEDEC MS-018AC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus for accessing all 64K words; A0–A15 fully decoded |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel data path; high-impedance when CE or OE inactive |
| CE | Chip Enable | Active-low chip select; must be low for read/write; controls device power state |
| OE | Output Enable | Active-low output gate; enables data drivers only during read cycles |
| WE | Write Enable | Active-low write strobe; latches address/data during programming/erase commands |
| VCC | Power Supply | 3.0–3.6V primary supply; powers core logic and I/O buffers |
| GND | Ground | Two dedicated ground pins (pins 18 and 30) reduce noise coupling |
| NC | No Connect | Pins 7, 19, 27, 28, 39, 40, 42, 43 - electrically isolated, no internal connection |
Key Features
| Feature | Design Value |
|---|---|
| Single-Voltage 3V Operation | Eliminates need for 12V programming voltage; simplifies power design and PCB layout |
| Hardware Boot Block Lockout | Prevents accidental overwrite of critical boot code after activation; irreversible protection |
| Data Polling & Toggle Bit | Enables software-driven timing-free polling for program/erase completion without fixed delays |
| Internal Program Timer | Removes external timing circuitry; guarantees correct pulse widths and sequencing |
| VSOP/PLCC Package Options | AT49LV1025-70JC's PLCC-44 allows socketed in-system reprogramming; AT49LV1024 uses VSOP-40 |
Applications
| Industrial PLC Firmware Storage | Embedded Network Router Boot Code |
|---|---|
Use Scenario: Storing boot loader and configuration firmware in programmable logic controllers subject to frequent field updates. IC Role / Device Role / Timing Role: Nonvolatile code storage with hardware-protected boot sector ensuring system recovery after failed updates. Use Value: Prevents bricking during remote firmware upgrades by locking boot code while allowing main memory reprogramming. | Use Scenario: Holding secure boot firmware in enterprise-grade network routers requiring tamper-resistant initialization code. IC Role / Device Role / Timing Role: 16-bit parallel Flash memory providing fast read access (70 ns) for CPU instruction fetch during boot sequence. Use Value: Enables deterministic boot timing and eliminates dependency on external voltage translators due to 3V-only operation. |
| Medical Device Diagnostic Image Cache | Automotive ECU Calibration Data |
Use Scenario: Caching diagnostic image metadata and calibration tables in portable ultrasound units with limited board space. IC Role / Device Role / Timing Role: Compact PLCC-44 footprint provides high-density nonvolatile storage without requiring BGA assembly. Use Value: Supports 10,000+ write cycles needed for repeated calibration logging across device lifetime. | Use Scenario: Storing engine calibration maps and fault logs in automotive ECUs operating in harsh thermal environments. IC Role / Device Role / Timing Role: Commercial-grade Flash memory qualified for 0°C–70°C ambient, integrated into CAN-connected control modules. Use Value: Delivers reliable data retention and verified erase endurance under cyclic thermal stress in under-hood locations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF100A-70-4C-NHE | Same density (1Mbit ×16), 70 ns access, but uses 3.3V ±10% supply and lacks boot-block lockout | Requires external software management for boot protection; no hardware-enforced write lock | Select when cost sensitivity outweighs need for hardware boot security |
| MX29LV102CTTI-70G | 1Mbit ×16, 70 ns, 3.0–3.6V, includes boot-block protection but uses different command set (Intel-style vs Atmel) | Requires firmware driver modification; not drop-in compatible for existing Atmel command sequences | Select when migrating legacy designs to newer process nodes with extended lifecycle support |
Compared with SST39VF100A-70-4C-NHE and MX29LV102CTTI-70G, the AT49LV1025-70JC uniquely delivers hardware-enforced boot-block lockout with Atmel-specific command protocol, enabling secure in-system reprogramming without firmware-level protection overhead.
Availability
AT49LV1025-70JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded network router boot code, and automotive ECU calibration data requiring stable component supply across multi-year production cycles.
Supply support for AT49LV1025-70JC 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 AT49LV1025 belongs to Atmel's 3V-only parallel Flash memory product line, designed specifically for in-system programmable boot code storage in resource-constrained embedded systems.
FAQ
What is the pin count and package type of the AT49LV1025-70JC?
The AT49LV1025-70JC uses a 44-lead Plastic Leaded Chip Carrier (PLCC) package with J-leads, conforming to JEDEC MS-018AC. It has two GND pins (18 and 30), one VCC pin (41), and 16 bidirectional I/O lines (I/O0–I/O15), plus address (A0–A15), control (CE/OE/WE), and NC terminals. The body measures 16.5 mm × 16.5 mm.
Does the AT49LV1025-70JC support hardware write protection for its boot sector?
Yes, the AT49LV1025-70JC includes a dedicated 8K-word boot block (0000H–1FFFH) with hardware-programmable lockout. Once enabled via a six-cycle command sequence (5555H/AA → 2AAAH/55 → 5555H/80 → 5555H/AA → 2AAAH/55 → 5555H/40), the boot block becomes permanently immune to erase and program operations - a feature confirmed in the official Atmel datasheet Rev. 1278D–07/01.
What is the guaranteed read access time for the AT49LV1025-70JC?
The AT49LV1025-70JC guarantees a maximum read access time of 70 ns under commercial temperature conditions (0°C to 70°C) and 3.0–3.6V supply. This value is specified in the AC Read Characteristics table and applies to tACC (address-to-output delay) and tCE (CE-to-output delay), ensuring deterministic timing for 16-bit parallel bus interfacing.
Can the AT49LV1025-70JC be programmed using only 3V supply voltage?
Yes, the AT49LV1025-70JC operates exclusively at 3.0–3.6V for both read and programming functions. Programming requires 3.1V minimum, eliminating need for high-voltage generators. All command sequences (e.g., Word Program, Chip Erase) execute using standard 3V logic levels on CE, OE, WE, and I/O lines - a core design feature confirmed in the "Single-voltage Operation" section of the datasheet.
How many program/erase cycles is the AT49LV1025-70JC rated for?
The AT49LV1025-70JC is rated for a minimum of 10,000 program/erase cycles per memory location, as specified in the Features section and validated across the commercial temperature range. This endurance rating applies to both chip-erase and main-memory-erase operations and is integral to its qualification for long-lifecycle embedded firmware storage applications.
AT49LV1025-70JC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-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:
- 64K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 70 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.6x16.6)
AT49LV1025-70JC FAQ
1.How can I place an order for AT49LV1025-70JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV1025-70JC 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 AT49LV1025-70JC reliable?
The price and inventory of AT49LV1025-70JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV1025-70JC is usually 5 days.
3.What payment methods are accepted for AT49LV1025-70JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV1025-70JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV1025-70JC?
AT49LV1025-70JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV1025-70JC 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 AT49LV1025-70JC?
For technical support, including AT49LV1025-70JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV1025-70JC requirements.
6.How does Aetrix verify that AT49LV1025-70JC is sourced from the original manufacturer or authorized distributors?
All AT49LV1025-70JC 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 AT49LV1025-70JC meets industry standards.
7.What is the process for return or replacement of AT49LV1025-70JC?
All AT49LV1025-70JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV1025-70JC, 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 AT49LV1025-70JC part is unused and in its original packaging.
Return procedure for AT49LV1025-70JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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