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Microchip Technology AT29LV020-10JU
- Part No.:
- AT29LV020-10JU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT29LV020-10JU.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,434
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Product details
Overview
AT29LV020-10JU from Atmel is a 2-Mbit (256K × 8) 3.3V-only Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It features 100 ns read access time, 20 ms sector program cycle time, 10,000 write/erase endurance, and dual 8K-byte boot blocks with independent programming lockout - deployed in industrial-grade PLC firmware storage and legacy BIOS modules.
For engineers reviewing the AT29LV020-10JU datasheet, AT29LV020-10JU pinout, AT29LV020-10JU application, or AT29LV020-10JU equivalent, key selection criteria include sector-based reprogrammability, software data protection compliance, boot block lockout verification, and PLCC-32 package compatibility with legacy socketed designs.
Technical Context
The AT29LV020-10JU implements sector-erase architecture with 1024 × 256-byte sectors, enabling in-system reprogramming without high-voltage programming supplies. Its internal address/data latches capture full 256-byte sectors at microprocessor speed before autonomous erase-and-program execution.
It supports both hardware and software data protection: three-byte unlock sequences (5555H/2AAAH/A0H) initiate byte loading, while VCC sense (<1.8V), 10 ms power-on delay, and noise filtering (<15 ns) prevent inadvertent writes. DATA polling on I/O7 and toggle-bit detection on I/O6 provide real-time program completion signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K bytes for direct byte-addressable firmware storage |
| Read Access Time | 100 ns - enables direct execution from flash (XIP) in 20 MHz microcontroller systems |
| Sector Program Time | 20 ms per 256-byte sector - defines minimum firmware update latency during field upgrades |
| Endurance | >10,000 write/erase cycles per sector - supports 5+ years of daily configuration updates in industrial controllers |
| Supply Voltage | 3.0–3.6 V only - eliminates need for 5V programming rails and simplifies power design |
| Standby Current | 50 µA CMOS - reduces quiescent power in battery-backed or energy-sensitive applications |
| Operating Temperature | −40°C to +85°C - qualified for industrial ambient environments without derating |
Pinout & Package
AT29LV020-10JU is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), compliant with JEDEC MS-016 AE, with 1.27 mm pitch and 12.45 mm × 14.95 mm body size. Pin 1 identifier is a corner notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-byte addressing; A0–A7 select byte within sector, A8–A17 select sector |
| I/O0–I/O7 | Bidirectional Data Bus | CMOS/TTL-compatible 8-bit data path; carries input data during programming and output data during read |
| CE | Chip Enable | Active-low chip select; must be low for read/write; high disables outputs and enters standby mode |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention during read operations |
| WE | Write Enable | Active-low write strobe; initiates byte load when CE is low and OE is high |
| NC | No Connect | Pin 16 (PLCC top view) is unconnected; must remain floating or tied to ground per layout guidelines |
| VCC | Power Supply | 3.3V ±0.3V supply; powers core logic and I/O buffers; requires local 0.1 µF decoupling |
| GND | Ground Reference | Signal and power return; must be connected to low-impedance system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (5555H/2AAAH/A0H) required before every sector program - prevents accidental firmware corruption during power transients |
| Dual Boot Block Lockout | Independent 8K-byte upper/lower boot blocks can be permanently locked via 7-command algorithm - secures bootloader code against overwrite |
| DATA Polling & Toggle Bit | I/O7 complement-read and I/O6 toggling provide asynchronous, bus-compatible program status feedback - eliminates need for external timers or status registers |
| Single-Cycle Sector Reprogram | Internal erase-and-program automation after 256-byte load - removes requirement for separate erase command in host firmware |
| Green Packaging | Pb/Halide-free PLCC-32 package - meets RoHS Directive 2011/65/EU without requiring process requalification |
Applications
| Industrial PLC Firmware Storage | Legacy BIOS/UEFI Module |
|---|---|
Use Scenario: Storing ladder logic programs and I/O configuration tables in programmable logic controllers operating in factory-floor environments with −25°C to +70°C ambient swings. IC Role / Device Role / Timing Role: Nonvolatile code storage device providing XIP-capable instruction fetch and parameter retention across power cycles. Use Value: 100 ns access time enables direct execution from flash without external SRAM cache; sector lockout prevents unauthorized modification of safety-critical control routines. | Use Scenario: Holding POST initialization code and hardware abstraction layer in x86-based industrial motherboards where BIOS updates occur infrequently but require absolute reliability. IC Role / Device Role / Timing Role: Boot ROM replacement with in-system reprogrammability, using lower 8K boot block for primary boot vector and upper 8K for recovery image. Use Value: Dual boot block lockout ensures primary and fallback firmware images remain intact during field updates; 10,000-cycle endurance exceeds typical motherboard lifecycle requirements. |
| Embedded Microcontroller Code Storage | Telecom Line Card Configuration |
Use Scenario: Hosting application firmware and calibration constants for ARM7-based motor drive controllers deployed in HVAC systems with thermal cycling between −40°C and +85°C. IC Role / Device Role / Timing Role: Standalone Flash memory interfaced directly to microcontroller's external memory bus for code and data persistence. Use Value: 50 µA standby current extends battery backup duration during AC loss; 3.3V-only operation eliminates level-shifting components in 3.3V system designs. | Use Scenario: Storing line provisioning parameters, DSP coefficients, and fault logs in carrier-grade DSLAM line cards subject to Telcordia GR-63-CORE shock/vibration profiles. IC Role / Device Role / Timing Role: Configuration EEPROM replacement offering faster write throughput and higher endurance than serial EEPROMs. Use Value: 20 ms sector program time enables sub-second parameter updates during service calls; software protection prevents misconfiguration during hot-swap events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV020C-10P | Same 2-Mbit density, 100 ns access, PLCC-32 package; requires different unlock sequence (AAH/55H/A0H) | Boot block lockout not implemented; no hardware-protected sector locking | Use only if boot security is not required and firmware already implements MXIC-specific command protocol |
| EN29LV020-10B | Identical timing and pinout; same 3.3V supply range; supports identical software data protection commands | Not recommended for new designs per manufacturer bulletin; limited long-term availability | Acceptable for drop-in replacement in existing designs with verified EN29LV020-10B firmware support |
Compared with AT29LV020-10JU, MX29LV020C-10P lacks boot block lockout and uses divergent programming commands, while EN29LV020-10B matches functionality but carries obsolescence risk - making AT29LV020-10JU the preferred choice for new industrial designs requiring secure, long-lifecycle Flash.
Availability
AT29LV020-10JU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy BIOS modules, and embedded microcontroller code storage requiring stable component supply and long-term manufacturing continuity.
Supply support for AT29LV020-10JU 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 company specializing in microcontrollers, Flash memory, and secure authentication devices for industrial and automotive markets.
The AT29LV020-10JU belongs to Atmel's legacy LV-series Flash memory product line, designed specifically for 3.3V in-system programmable code storage in space-constrained, thermally demanding embedded systems.
FAQ
What is the maximum operating temperature range for the AT29LV020-10JU?
The AT29LV020-10JU is rated for industrial operation from −40°C to +85°C. This range is validated across all electrical specifications including 100 ns read access time and 20 ms sector program time. The device maintains full functionality without derating within this envelope, making it suitable for deployment in uncontrolled industrial enclosures and outdoor telecom cabinets.
Does the AT29LV020-10JU support true 3.3V-only programming without external voltage boosters?
Yes, the AT29LV020-10JU performs all read and write operations using only a 3.0–3.6 V supply - no 5V or 12V programming voltages are required. Programming is initiated via standard 3.3V-level command sequences (5555H/2AAAH/A0H), and internal charge pumps generate necessary high-voltage pulses. This eliminates external voltage translators and simplifies PCB layout for AT29LV020-10JU-based systems.
How does the boot block lockout feature work on the AT29LV020-10JU?
The AT29LV020-10JU contains two dedicated 8K-byte boot blocks - one at addresses 00000H–01FFFH (lower) and one at 3E000H–3FFFFH (upper). Each can be independently locked using a seven-command software sequence. Once activated, that block becomes permanently read-only: no erase or program commands affect it. Lock status is verified by reading 00002H (lower) or 3FFF2H (upper); FEH means unlocked, FFH means locked. This protects bootloader integrity in AT29LV020-10JU deployments.
Can the AT29LV020-10JU be used as a direct replacement for standard EPROMs like the 27C020?
No, the AT29LV020-10JU is not a pin-compatible or functionally transparent replacement for 5V EPROMs such as the 27C020. While both are 2-Mbit × 8 devices, AT29LV020-10JU requires 3.3V supply, uses software-controlled sector programming instead of UV erasure, and has different timing (e.g., WE-controlled byte loading vs. EPROM address latch enable). Hardware redesign and firmware adaptation are required to migrate from 27C020 to AT29LV020-10JU.
What packaging option does the AT29LV020-10JU use, and is it RoHS-compliant?
The AT29LV020-10JU uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package, designated "JU" in the ordering code. It is Pb/Halide-free and fully RoHS-compliant per Directive 2011/65/EU. The package conforms to JEDEC standard MS-016, Variation AE, with 1.27 mm lead pitch and 12.45 mm × 14.95 mm body dimensions - ensuring mechanical and thermal compatibility with legacy PLCC sockets used for AT29LV020-10JU in industrial control boards.
AT29LV020-10JU 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:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20ms
- Access Time:
- 100 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)
AT29LV020-10JU FAQ
1.How can I place an order for AT29LV020-10JU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV020-10JU 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 AT29LV020-10JU reliable?
The price and inventory of AT29LV020-10JU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV020-10JU is usually 5 days.
3.What payment methods are accepted for AT29LV020-10JU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV020-10JU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV020-10JU?
AT29LV020-10JU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV020-10JU 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 AT29LV020-10JU?
For technical support, including AT29LV020-10JU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV020-10JU requirements.
6.How does Aetrix verify that AT29LV020-10JU is sourced from the original manufacturer or authorized distributors?
All AT29LV020-10JU 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 AT29LV020-10JU meets industry standards.
7.What is the process for return or replacement of AT29LV020-10JU?
All AT29LV020-10JU units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV020-10JU, 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 AT29LV020-10JU part is unused and in its original packaging.
Return procedure for AT29LV020-10JU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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