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Microchip Technology AT49LV001-90JC
- Part No.:
- AT49LV001-90JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49LV001-90JC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,192
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Product details
Overview
AT49LV001-90JC from Atmel is a 1 Mbit (128K × 8) single-supply 3.0–3.6 V Flash memory IC with 70 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 industrial controllers.
For engineers reviewing the AT49LV001-90JC datasheet, AT49LV001-90JC pinout, AT49LV001-90JC application, or AT49LV001-90JC equivalent, key selection considerations include its PLCC-32 package, 90 ns max access timing, boot block programming lockout feature, and compatibility with standard EPROM-like bus interface (CE/OE/WE).
Technical Context
The AT49LV001-90JC implements a command-register-based architecture requiring six-byte software sequences for chip/sector erase and boot lockout enable. Its internal program control logic eliminates need for external high-voltage programming signals, enabling true 3V-only operation.
It features dual erase mechanisms-full-chip erase (≤10 s) and sector-selectable erase-and supports DATA polling (I/O7 complement) and toggle-bit (I/O6) methods for cycle completion detection. The boot block (00000H–03FFFH) is protected via write-lock command and override-capable RESET pin (12 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - directly replaces EPROMs in 8-bit microcontroller address/data buses. |
| Read Access Time | 90 ns max (tACC) - ensures compatibility with 10 MHz Z80/8051 systems without wait states. |
| Supply Voltage | 3.0 V to 3.6 V - operates from standard 3.3 V rails without level-shifting or auxiliary supplies. |
| Erase Cycle Time | 10 seconds typical for full chip - enables field firmware updates within defined maintenance windows. |
| Programming Time | 30 µs/byte typical - supports efficient incremental code patching during development and production programming. |
| Endurance | 10,000 write/erase cycles - validated for long-term use in programmable logic controllers and instrumentation firmware storage. |
| Standby Current | 50 µA CMOS - minimizes power in battery-backed or low-power sleep modes of portable devices. |
Pinout & Package
AT49LV001-90JC is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package with J-leads, pin-compatible with industry-standard 32-pin PLCC sockets. Thermal and mechanical characteristics align with JEDEC MS-026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 required for top 64K region. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface compatible with 8051, Z80, and 68K family data buses; high-impedance when deselected. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - prevents bus contention in multi-device systems. |
| OE | Output Enable | Active-low output control; used with CE to gate data onto shared bus - enables memory-mapped I/O without external buffers. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence - critical for reliable byte programming and erase initiation. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot block override - essential for secure bootloader recovery. |
| VCC | Power Supply | +3.0 V to +3.6 V supply; decoupling capacitor (0.1 µF) required at pin for stable read/write timing. |
| GND | Ground Reference | Signal and power ground reference; requires low-inductance connection to minimize noise coupling into sensitive control lines. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | Independent 16 KB boot block + dual 8 KB parameter blocks + 32 KB/64 KB main memory - enables secure bootloader storage while allowing dynamic configuration and application code updates. |
| Boot Block Lockout | Software-enabled permanent write protection for boot sector (00000H–03FFFH); lockout detectable via software ID mode - prevents accidental corruption of startup firmware in deployed systems. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filter (rejects <15 ns glitches), and control-line inhibit (OE low/CE high/WE high blocks writes) - eliminates spurious writes due to power transients or EMI. |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide real-time, bus-compatible program/erase status without requiring external timers or interrupts - simplifies host firmware implementation. |
| 3V-Only Command Interface | No external 12 V or 5 V required for programming; all commands executed using standard 3.3 V logic levels - reduces BOM count and PCB complexity vs. legacy EPROMs. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers operating in factory-floor environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped to microcontroller address space; provides deterministic 90 ns read latency for real-time scan-cycle execution. Use Value: Sector erase allows updating application logic without disturbing boot code; 50 µA standby current extends uptime in battery-buffered backup scenarios. | Use Scenario: Holding certified bootloader and safety-critical initialization routines in FDA-regulated diagnostic equipment requiring tamper-resistant firmware storage. IC Role / Device Role / Timing Role: Secure boot memory with hardware-enforced write lock; accessed during cold start before application code loads. Use Value: Boot block lockout prevents unauthorized modification; 10,000-cycle endurance supports long product lifecycles and regulatory revalidation cycles. |
| Embedded Network Gateway Configuration | Automotive Body Control Module Code Storage |
Use Scenario: Storing network stack parameters, MAC addresses, and calibration tables in Ethernet-to-fieldbus gateways deployed in building automation systems. IC Role / Device Role / Timing Role: Parameter block memory (two 8 KB sections) used for field-updatable configuration data accessed via SPI-to-parallel bridge. Use Value: Independent sector erase enables over-the-air updates to network settings without resetting active communication channels. | Use Scenario: Storing vehicle-specific calibration maps and CAN protocol handlers in body control modules operating across -40°C to +85°C ambient range. IC Role / Device Role / Timing Role: Main memory block (32 KB/64 KB) storing runtime-executable code; accessed via 8-bit bus under microcontroller control. Use Value: 3.0–3.6 V operation matches automotive 3.3 V rail; 10-second erase time fits within module power-on self-test (POST) window. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV001-90JC | Wider VCC range (2.7–3.6 V); higher active current (50 mA); same PLCC-32 package and pinout | Supports battery-powered systems down to 2.7 V; less suitable for strict 3.3 V-only designs with tight power budgets | Select when wider supply tolerance or legacy BV-series compatibility is required. |
| AM29LV001BT-90JC | Different command set (AMD-style); 90 ns access; PLCC-32; 1 Mbit density; no RESET-based boot override | Lacks 12 V boot unlock; uses different sector address mapping; requires AMD-compatible programming algorithm | Choose only if existing AMD-based programming infrastructure is in place and boot override is not needed. |
Compared with AT49BV001-90JC and AM29LV001BT-90JC, the AT49LV001-90JC offers tighter voltage regulation (3.0–3.6 V), lower standby current (50 µA), and unique 12 V RESET-based boot block recovery - making it optimal for power-constrained, security-sensitive embedded applications where firmware integrity is critical.
Availability
AT49LV001-90JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and embedded network gateway configuration requiring stable component supply and long-term obsolescence management.
Supply support for AT49LV001-90JC 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 secure authentication ICs.
The AT49LV001-90JC belongs to Atmel's low-voltage Flash memory product line, designed specifically for 3.3 V embedded systems requiring reliable, in-system reprogrammable code and configuration storage with hardware-level data protection.
FAQ
What is the maximum read access time specified for the AT49LV001-90JC?
The AT49LV001-90JC has a maximum read access time (tACC) of 90 ns, measured from address valid to valid data output under commercial temperature conditions (0°C to 70°C) and 3.0–3.6 V supply. This value is guaranteed across the full operating range and is consistent with the "-90" speed grade designation in the part number.
Does the AT49LV001-90JC support boot block write protection, and how is it enabled?
Yes, the AT49LV001-90JC supports boot block programming lockout for its 16 KB boot sector (00000H–03FFFH). It is enabled by executing a six-cycle command sequence (5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → 5555H/40H). Once activated, writes to the boot block are inhibited at ≤5.5 V, and lockout status can be verified via software product identification mode.
What package type is used for the AT49LV001-90JC, and what are its key mechanical features?
The AT49LV001-90JC uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package (suffix "J"). It features a 1.27 mm lead pitch, square 13.97 mm × 13.97 mm body, and J-shaped leads for socket compatibility. The package supports reflow soldering per JEDEC J-STD-020 and is rated for commercial temperature operation (0°C to 70°C).
Can the AT49LV001-90JC be programmed using standard 3.3 V logic levels only?
Yes, the AT49LV001-90JC is a true 3V-only Flash memory: all read, program, and erase operations execute using only 3.0–3.6 V supply and standard TTL/CMOS logic levels on CE, OE, WE, and RESET. No external high-voltage generators or 5 V/12 V supplies are required - simplifying system design and reducing component count compared to older EPROM or UV-erasable Flash devices.
How does the AT49LV001-90JC indicate completion of a byte programming cycle?
The AT49LV001-90JC provides two hardware methods: (1) DATA polling - reading the last programmed byte returns its complement on I/O7 until completion, then true data; (2) Toggle Bit - I/O6 toggles between 0 and 1 during programming and stops toggling upon completion. Both methods allow the host microcontroller to poll status without timers or interrupts, ensuring robust timing-independent firmware control of the AT49LV001-90JC.
AT49LV001-90JC 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)
AT49LV001-90JC FAQ
1.How can I place an order for AT49LV001-90JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV001-90JC 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 AT49LV001-90JC reliable?
The price and inventory of AT49LV001-90JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV001-90JC is usually 5 days.
3.What payment methods are accepted for AT49LV001-90JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV001-90JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV001-90JC?
AT49LV001-90JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV001-90JC 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 AT49LV001-90JC?
For technical support, including AT49LV001-90JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV001-90JC requirements.
6.How does Aetrix verify that AT49LV001-90JC is sourced from the original manufacturer or authorized distributors?
All AT49LV001-90JC 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 AT49LV001-90JC meets industry standards.
7.What is the process for return or replacement of AT49LV001-90JC?
All AT49LV001-90JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV001-90JC, 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 AT49LV001-90JC part is unused and in its original packaging.
Return procedure for AT49LV001-90JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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