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Microchip Technology AT29LV020-10JI
- Part No.:
- AT29LV020-10JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT29LV020-10JI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,461
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Product details
Overview
AT29LV020-10JI from Atmel is a 2-Mbit (256K × 8) 3.3V-only Flash memory IC used for nonvolatile program/data storage in embedded microcontroller systems. It features 100 ns read access time, 20 ms sector programming, 10,000 write/erase endurance, and dual 8K-byte boot blocks with independent lockout. Designed for industrial temperature operation (–40°C to +85°C), it supports in-system reprogramming via software data protection without high-voltage inputs.
For engineers reviewing the AT29LV020-10JI datasheet, AT29LV020-10JI pinout, AT29LV020-10JI application, or AT29LV020-10JI equivalent, key selection considerations include its PLCC-32 industrial-grade packaging, sector-based erase-and-program architecture, boot block security, DATA polling and toggle-bit status detection, and compatibility with 3.3V microprocessor buses.
Technical Context
The AT29LV020-10JI implements a sector-erasable Flash architecture with 1024 × 256-byte sectors, enabling selective reprogramming without full-chip erase. Its internal address/data latches capture 256 bytes at microprocessor speed, freeing the bus during autonomous internal erase-and-program cycles controlled by an on-chip timer.
It uses a three-byte software unlock sequence (5555h/2AAAh/5555h) to enable programming, with hardware safeguards including VCC sense (<1.8V inhibit), 10 ms power-on delay, and noise filtering on WE/CE. Boot block lockout is activated via a seven-command algorithm and disables chip erase when enabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K bytes for byte-level addressing |
| Supply Voltage | 3.0 V to 3.6 V - operates exclusively from standard 3.3V rail, no 5V required |
| Read Access Time | 100 ns - enables direct interface with 10 MHz microcontrollers without wait states |
| Sector Program Time | 20 ms - fixed internal cycle for erasing and programming 256-byte sector |
| Endurance | >10,000 write/erase cycles per sector - supports field firmware updates over product lifetime |
| Standby Current | 40 µA (CMOS) - ultra-low power retention for battery-backed or energy-sensitive systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and transportation control |
Pinout & Package
AT29LV020-10JI is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC-32), JEDEC MS-016 compliant, with pin 1 identifier at corner and J-leads for surface-mount reliability in industrial PCBs.
| 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 |
| CE | Chip Enable | Active-low chip select; must be low for read/write; high forces outputs to high-Z and enters CMOS standby |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during reads |
| WE | Write Enable | Active-low write strobe; initiates byte load during programming; must be high during reads |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit data path for reads and writes; supports DATA polling on I/O7 and toggle-bit detection on I/O6 |
| NC | No Connect | Pin 29 (PLCC top view) - unconnected; must not be tied to any voltage or signal |
| VCC | Power Supply | +3.3V ±0.3V supply; internal VCC sense prevents programming below 1.8V |
| GND | Ground | Reference return for all signals and power; decoupling capacitor required near VCC pin |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (5555h/2AAAh/5555h) prevents accidental writes - essential for field-upgradable firmware safety |
| Dual Boot Block Lockout | Independent 8K-byte lockout for first and last memory segments - secures bootloader code against overwrite during application updates |
| DATA Polling & Toggle Bit | I/O7 complement-read and I/O6 toggling provide real-time, bus-compatible program completion detection without external timers or interrupts |
| Single-Cycle Sector Reprogram | Automatic internal erase before programming eliminates separate erase command - simplifies firmware update routines |
| CMOS/TTL Input Compatibility | Inputs accept 0–5.5V logic levels while operating at 3.3V - enables direct interfacing with mixed-voltage legacy microcontrollers |
Applications
| Industrial PLC Firmware Storage | Embedded Network Router Boot Code |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers deployed in factory-floor environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding startup code and runtime parameters; accessed during cold boot and firmware update cycles. Use Value: Industrial temperature rating (–40°C to +85°C) and 10,000-cycle endurance ensure reliable operation across decades of scheduled updates and maintenance cycles. |
Use Scenario: Holding secure bootloader and recovery image in enterprise-grade network routers requiring fail-safe firmware rollback capability. IC Role / Device Role / Timing Role: Primary boot memory with protected 8K lower-block storing immutable bootloader; upper 8K block holds updatable recovery image. Use Value: Independent boot block lockout prevents corruption of critical startup code during remote firmware upgrades over unreliable WAN links. |
| Automotive Diagnostic Tool Memory | Medical Device Configuration Storage |
Use Scenario: Storing vehicle-specific diagnostic protocols and calibration tables in handheld OBD-II scanners used across diverse ambient conditions. IC Role / Device Role / Timing Role: Field-updatable parameter memory mapped into microcontroller address space; programmed via USB-hosted update utility. Use Value: 100 ns read access enables real-time protocol lookup during live vehicle communication; PLCC-32 package withstands mechanical shock and thermal cycling. |
Use Scenario: Retaining device-specific calibration coefficients, user preferences, and regulatory audit logs in portable medical monitors requiring traceable data integrity. IC Role / Device Role / Timing Role: Secure nonvolatile storage for safety-critical configuration data; accessed only during power-on initialization and user settings changes. Use Value: Software data protection and boot block lockout prevent unauthorized or erroneous modification of calibrated sensor parameters during clinical use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF200A-70-4C-NHE | 70 ns read access; 512-byte sectors; 100,000 endurance cycles; 3.3V supply | Higher endurance and faster read, but lacks boot block lockout and uses different software unlock sequence | Preferred where frequent field updates are required and bootloader protection is handled externally |
| MX29LV200CTTI-70G | 70 ns read; 64K-byte boot blocks; 100,000 cycles; supports CFI query mode | Includes Common Flash Interface support for auto-detection, but requires different timing and command set | Recommended for new designs needing standardized flash interface and higher reliability margin |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, the AT29LV020-10JI offers proven industrial-temperature stability and dedicated boot block security at the cost of slower read timing and lower endurance - making it optimal for cost-sensitive, long-lifecycle legacy systems where firmware integrity is prioritized over update frequency.
Availability
AT29LV020-10JI is available at Aetrix Electronics and suitable for industrial control, embedded networking, and automotive diagnostics requiring stable component supply, long-term lifecycle support, and verified PLCC-32 packaging.
Supply support for AT29LV020-10JI 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 U.S.-based semiconductor company specializing in microcontrollers, Flash memory, and secure authentication devices.
The AT29LV020-10JI belongs to Atmel's legacy LV-series Flash memory family, designed specifically for 3.3V in-system programmability in industrial and automotive embedded systems where reliability, security, and long-term availability are critical.
FAQ
What is the operating temperature range for the AT29LV020-10JI?
The AT29LV020-10JI is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the Ordering Information table and DC Operating Range section of the datasheet. The "I" suffix in the part number explicitly denotes industrial temperature grade, distinguishing it from commercial-grade variants like AT29LV020-10JC. This range ensures reliable performance in factory automation, transportation, and outdoor equipment applications.
Does the AT29LV020-10JI require a 5V supply for programming?
No, the AT29LV020-10JI operates exclusively from a 3.0V to 3.6V supply and does not require 5V for programming. Programming is enabled via a software-controlled three-byte unlock sequence applied at 3.3V, eliminating the need for high-voltage generators. Hardware safeguards - including VCC sense below 1.8V and 10 ms power-on delay - further ensure that inadvertent programming cannot occur during power transitions.
How is boot block protection implemented on the AT29LV020-10JI?
The AT29LV020-10JI provides two independent 8K-byte boot blocks (first and last 8K of memory) with programmable lockout. Activation requires a seven-command software algorithm; once set, the corresponding block becomes permanently read-only - preventing erasure or reprogramming. The lockout status can be verified by reading addresses 00002H (lower block) and 3FFF2H (upper block); FEh indicates unlocked, FFh indicates locked. Enabling lockout also disables chip erase functionality.
What package type is used for the AT29LV020-10JI?
The AT29LV020-10JI uses a 32-lead Plastic Leaded Chip Carrier (PLCC-32) package, identified by the "J" suffix in the ordering code. This JEDEC MS-016 compliant package features J-shaped leads for surface-mount assembly and is specified in the Packaging Information section with full mechanical dimensions. It differs from the TSOP-32 variant (denoted by "T" suffix, e.g., AT29LV020-10TI) and is preferred for industrial applications requiring mechanical robustness and thermal cycling resilience.
How does the AT29LV020-10JI indicate completion of a programming cycle?
The AT29LV020-10JI supports two hardware-confirmed methods: DATA polling and Toggle Bit detection. During programming, reading the last loaded byte returns the complement of the data on I/O7; when programming completes, true data appears. Alternatively, I/O6 toggles between 0 and 1 during the cycle and stops toggling upon completion. Both methods allow the host microcontroller to detect readiness without fixed delays or external timers, enabling deterministic firmware update sequences.
AT29LV020-10JI 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)
AT29LV020-10JI FAQ
1.How can I place an order for AT29LV020-10JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV020-10JI 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 AT29LV020-10JI reliable?
The price and inventory of AT29LV020-10JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV020-10JI is usually 5 days.
3.What payment methods are accepted for AT29LV020-10JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV020-10JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV020-10JI?
AT29LV020-10JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV020-10JI 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 AT29LV020-10JI?
For technical support, including AT29LV020-10JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV020-10JI requirements.
6.How does Aetrix verify that AT29LV020-10JI is sourced from the original manufacturer or authorized distributors?
All AT29LV020-10JI 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 AT29LV020-10JI meets industry standards.
7.What is the process for return or replacement of AT29LV020-10JI?
All AT29LV020-10JI units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV020-10JI, 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 AT29LV020-10JI part is unused and in its original packaging.
Return procedure for AT29LV020-10JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT29LV020-10JI Tags
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