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Microchip Technology AT29LV020-10TI
- Part No.:
- AT29LV020-10TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29LV020-10TI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,626
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Product details
Overview
AT29LV020-10TI from Atmel is a 2-Mbit (256K × 8) 3.3V-only Flash memory IC organized as 262,144 bytes × 8 bits, featuring 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 - used for firmware storage and boot code retention in embedded microcontroller systems.
For engineers reviewing the AT29LV020-10TI datasheet, AT29LV020-10TI pinout, AT29LV020-10TI application, or AT29LV020-10TI equivalent, key selection criteria include industrial temperature range (-40°C to +85°C), PLCC-32 or TSOP-32 package compatibility, software data protection sequence, DATA polling/Toggle Bit status detection, and sector-based reprogrammability without high-voltage programming.
Technical Context
The AT29LV020-10TI implements sector-erase Flash architecture with 1024 × 256-byte sectors and two dedicated 8K-byte boot blocks. It uses standard 5V-compatible command sequences (e.g., 0x5555/0x2AAA/0xA0) for software-controlled programming and supports both hardware and software product identification modes via A9 voltage or address-based entry.
Its operation relies on CMOS-compatible I/O (VIH = 2.0V, VIL = 0.6V), internal latching of 256-byte sector data at microprocessor speed, and automatic erase-before-program sequencing. End-of-program detection is implemented via DATA polling on I/O7 or Toggle Bit behavior on I/O6, with no external timing control required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), enabling full firmware image storage for 8-bit MCUs |
| Read Access Time | 100 ns max - supports direct execution from memory in real-time embedded systems |
| Sector Program Time | 20 ms typical - allows rapid field updates of firmware segments without full chip erase |
| Endurance | >10,000 write/erase cycles per sector - suitable for infrequent but critical configuration updates |
| Supply Voltage | 3.0V–3.6V only - eliminates need for 5V programming supply in modern low-voltage designs |
| Standby Current | 40 µA (CMOS) - enables ultra-low-power retention in battery-backed applications |
| Operating Temp | -40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor equipment |
Pinout & Package
AT29LV020-10TI is available in 32-lead PLCC (32J) and TSOP (32T) packages. The PLCC variant features gull-wing leads with pin 1 identifier corner; TSOP variant uses thin-profile surface-mount leads with 0.5 mm pitch and 8 mm × 20 mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-byte addressing; A8–A17 select sector, A0–A7 select byte within sector |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with 8-bit microcontrollers; supports DATA polling on I/O7 and Toggle Bit on I/O6 |
| CE | Chip Enable | Active-low chip select; must be low for read/write; high disables outputs to high-impedance state |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during shared-memory access |
| WE | Write Enable | Active-low write strobe; controls byte load timing and initiates sector programming when combined with software command sequence |
| VCC | Power Supply | +3.3V ±0.3V supply; internal VCC sense circuitry inhibits programming if voltage drops below 1.8V |
| GND | Ground Reference | Signal and power ground reference; decoupling capacitor required near VCC pin for stable operation |
| NC | No Connect | Unbonded pin; must remain unconnected per datasheet - not usable as spare I/O or tie-high/tie-low |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-command unlock sequence (0x5555/0x2AAA/0xA0) prevents accidental writes - essential for field-upgradable systems |
| Dual Boot Block Lockout | Independent 8K-byte lockout for lower (0x00000–0x01FFF) and upper (0x3E000–0x3FFFF) memory regions - secures bootloader and recovery firmware |
| DATA Polling & Toggle Bit | Real-time program status feedback via I/O7 complement or I/O6 toggling - eliminates need for fixed delay timers in host firmware |
| Internal Address/Data Latches | Latches full 256-byte sector data at microprocessor speed - frees system bus for concurrent operations during programming |
| Hardware Program Inhibit | VCC sense, 10 ms power-on delay, noise filtering (<15 ns), and control-line gating - ensures robustness against power glitches and EMI |
Applications
| Industrial PLC Firmware Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing firmware and calibration tables in programmable logic controllers deployed in factory automation environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; provides deterministic 100 ns read latency for real-time instruction fetch. Use Value: Enables remote firmware updates without hardware replacement; industrial temp rating (-40°C to +85°C) ensures reliability in uncontrolled cabinet environments. | Use Scenario: Holding boot code and configuration data in vehicle body control units managing door locks, lighting, and window functions. IC Role / Device Role / Timing Role: Boot block-protected Flash memory; lower 8K-byte block stores immutable bootloader, upper 8K-byte block holds field-updatable application logic. Use Value: Dual boot block lockout prevents corruption of critical startup routines during over-the-air updates; 3.3V-only operation simplifies power design in 12V automotive systems. |
| Medical Diagnostic Equipment BIOS | Network Router Boot Image Storage |
Use Scenario: Retaining BIOS and self-test routines in portable ultrasound and patient monitor devices requiring long-term data integrity and regulatory compliance. IC Role / Device Role / Timing Role: Secure, tamper-resistant firmware repository; software data protection and hardware inhibit features meet IEC 62304 safety requirements. Use Value: >10,000 endurance cycles support periodic regulatory-mandated firmware validation; CMOS standby current (40 µA) extends battery life during device idle periods. | Use Scenario: Storing boot loader and initial configuration images in enterprise-grade Ethernet switches and wireless access points. IC Role / Device Role / Timing Role: Primary boot memory interfaced directly to MIPS/ARM SoC; supports fast read access for rapid system initialization. Use Value: Sector-based programming allows partial image updates without disrupting active network services; TSOP-32 package enables high-density PCB layout in space-constrained networking hardware. |
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, 5V-tolerant I/O, same 2 Mbit density and PLCC-32/TSOP-32 footprint | Higher speed but lacks boot block lockout; requires external 5V for some command modes | Preferred where faster read timing is critical and boot security is handled externally |
| MX29LV200CTTI-70G | 70 ns access, identical 3.3V-only operation, same sector architecture and software protection scheme | Includes CFI query support and extended temperature range (-40°C to +105°C) | Recommended for new designs requiring broader temp margin and industry-standard CFI compatibility |
Compared with AT29LV020-10TI, SST39VF200A offers faster reads but reduced security isolation, while MX29LV200CTTI-70G matches core functionality with enhanced manufacturability and extended thermal qualification - both require verification of command-set alignment in existing firmware.
Availability
AT29LV020-10TI is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT29LV020-10TI 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 ICs.
The AT29LV020 product line was designed for cost-sensitive, in-system programmable nonvolatile storage in 8-bit embedded systems - emphasizing single-supply simplicity, sector-level flexibility, and industrial-grade reliability.
FAQ
What is the operating voltage range for AT29LV020-10TI?
The AT29LV020-10TI operates exclusively from a 3.0V to 3.6V supply. It does not support 5V operation, and its internal VCC sense circuitry inhibits programming if voltage falls below 1.8V. This single-supply requirement simplifies power design in modern low-voltage systems and eliminates need for charge pumps or external voltage translators. The AT29LV020-10TI maintains full functionality across its specified industrial temperature range under this supply condition.
Does AT29LV020-10TI support in-system programming without high-voltage signals?
Yes, AT29LV020-10TI supports full in-system programming using only its 3.3V supply - no external high-voltage programming signal is required. Programming is initiated via a three-byte software command sequence (0x5555 → 0x2AAA → 0xA0) followed by sector data loading. The AT29LV020-10TI automatically handles erase-before-program internally, making it suitable for field firmware updates via standard microcontroller GPIOs and buses.
How is end-of-program detection implemented in AT29LV020-10TI?
AT29LV020-10TI provides two hardware-supported methods: DATA polling on I/O7 (returns complement of loaded data until completion) and Toggle Bit monitoring on I/O6 (toggles between 0 and 1 during programming). Both methods allow host firmware to detect completion without fixed delays. The AT29LV020-10TI guarantees valid data on all outputs once either method confirms completion, enabling immediate subsequent read or write access.
What is the purpose of the boot block lockout feature in AT29LV020-10TI?
The AT29LV020-10TI includes two independent 8K-byte boot blocks (lower: 0x00000–0x01FFF; upper: 0x3E000–0x3FFFF) that can be permanently locked against further programming. Once enabled via a seven-command algorithm, locked blocks retain their content indefinitely - protecting bootloader code from accidental overwrite. The AT29LV020-10TI supports separate lockout activation for each block, allowing flexible system partitioning between immutable and updatable firmware regions.
Can AT29LV020-10TI be used with 5V-tolerant microcontrollers?
Yes, AT29LV020-10TI inputs (A0–A17, CE, OE, WE) tolerate 0–5.5V drive levels while operating from 3.3V, and outputs (I/O0–I/O7) drive 0–3.6V. This allows direct interface with legacy 5V microcontrollers without level shifters, provided output voltage thresholds (VIH = 2.0V, VIL = 0.6V) are met. The AT29LV020-10TI's TTL/CMOS-compatible I/O ensures reliable communication across mixed-voltage system designs.
AT29LV020-10TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- 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-TSOP
AT29LV020-10TI FAQ
1.How can I place an order for AT29LV020-10TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV020-10TI 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 AT29LV020-10TI reliable?
The price and inventory of AT29LV020-10TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV020-10TI is usually 5 days.
3.What payment methods are accepted for AT29LV020-10TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV020-10TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV020-10TI?
AT29LV020-10TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV020-10TI 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 AT29LV020-10TI?
For technical support, including AT29LV020-10TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV020-10TI requirements.
6.How does Aetrix verify that AT29LV020-10TI is sourced from the original manufacturer or authorized distributors?
All AT29LV020-10TI 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 AT29LV020-10TI meets industry standards.
7.What is the process for return or replacement of AT29LV020-10TI?
All AT29LV020-10TI units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV020-10TI, 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 AT29LV020-10TI part is unused and in its original packaging.
Return procedure for AT29LV020-10TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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