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Microchip Technology AT29LV020-12TI
- Part No.:
- AT29LV020-12TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29LV020-12TI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,183
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Product details
Overview
AT29LV020-12TI from Atmel is a 2-megabit (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, and 10,000 write/erase endurance cycles. It supports software data protection, boot block lockout, and DATA polling for end-of-program detection in embedded firmware storage applications.
For engineers reviewing the AT29LV020-12TI datasheet, AT29LV020-12TI pinout, AT29LV020-12TI application, or AT29LV020-12TI equivalent, this page delivers verified electrical specs, PLCC-32 package mapping, sector-based reprogramming behavior, industrial temperature operation (–40°C to +85°C), and functional alternatives for legacy system maintenance and BOM continuity planning.
Technical Context
The AT29LV020-12TI implements sector-erase architecture with 1024 independent 256-byte sectors, enabling selective in-system reprogramming without full-chip erase. Its internal address/data latches capture 256 bytes at microprocessor speed, freeing the bus during internal programming.
It uses a three-byte software unlock sequence (AAh→55h→A0h) to enable byte loading, with hardware protections including VCC sense (<1.8V inhibit), 10 ms power-on delay, and noise filtering on WE/CE inputs. Boot block lockout applies independently to two 8K-byte regions-lower (0x00000–0x01FFF) and upper (0x3E000–0x3FFFF)-and disables chip erase when activated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), sufficient for BIOS/firmware images up to 256 KB |
| Read Access Time | 120 ns max - meets timing for 8 MHz Z80 or 16-bit microcontroller interfaces |
| Supply Voltage | 3.3 V ± 0.3 V - compatible with modern low-voltage logic without level shifters |
| Active Current | 15 mA max - enables low-power operation in battery-backed or portable systems |
| Standby Current | 50 µA max (industrial temp) - supports long-term retention in always-on embedded controllers |
| Sector Size | 256 bytes - allows fine-grained updates without disturbing adjacent firmware sections |
| Endurance | 10,000 program/erase cycles per sector - supports field firmware patching over product lifetime |
Pinout & Package
AT29LV020-12TI is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32), compliant with JEDEC MS-016, Variation AE. Dimensions: 12.45 mm × 14.95 mm × 3.35 mm (max height), lead pitch 1.27 mm, coplanarity ≤ 0.102 mm.
| 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 | 8-bit parallel interface; supports DATA polling on I/O7 and toggle-bit detection on I/O6 during programming |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; inhibits programming if held high |
| OE | Output Enable | Active-low output control; high-Z state prevents bus contention; required high during sector programming |
| WE | Write Enable | Active-low write strobe; controls byte load timing; pulse width ≥200 ns required for valid programming |
| VCC | Power Supply | +3.3 V supply; device inhibits programming if voltage drops below ~1.8 V |
| GND | Ground Reference | Signal and power ground reference; decoupling capacitor recommended near pin 16 |
| NC | No Connect | Pin 31 (PLCC top view) - must remain unconnected; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (5555h/2AAAh/5555h) prevents accidental writes - critical for field-upgradable systems |
| Boot Block Lockout | Independent 8K-byte lockout for lower and upper memory blocks - secures bootloader code against corruption |
| DATA Polling & Toggle Bit | I/O7 complement-read and I/O6 toggling provide real-time, non-intrusive program completion detection |
| Single-Cycle Sector Reprogram | Automatic internal erase + program eliminates external erase commands - simplifies firmware update routines |
| CMOS/TTL Input Compatibility | Inputs accept 0–5.5 V; outputs drive 0–3.6 V - interoperable with mixed-voltage legacy designs |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded Controller Bootloader |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot code and runtime logic; accessed via 8-bit parallel bus with 120 ns read latency. Use Value: Industrial temperature rating (–40°C to +85°C) and 10,000-cycle endurance ensure reliable field updates over 10+ years of operation. | Use Scenario: Hosting immutable bootloader code in microcontroller-based instrumentation where firmware integrity is safety-critical. IC Role / Device Role / Timing Role: Secure boot memory with hardware-enforced lockout on first 8K bytes; prevents unauthorized modification of startup sequence. Use Value: Boot block lockout eliminates need for external write-protection circuitry, reducing BOM cost and PCB footprint. |
| Automotive Diagnostic Module Code | Point-of-Sale Terminal Configuration Memory |
Use Scenario: Storing diagnostic application code and calibration tables in OBD-II scan tools requiring field-upgradable functionality. IC Role / Device Role / Timing Role: In-system reprogrammable Flash memory supporting sector-level updates via CAN or USB bridge controller. Use Value: 256-byte sector granularity enables patching of individual diagnostic routines without erasing entire application image. | Use Scenario: Retaining localized language packs, tax tables, and merchant-specific settings across power cycles in retail terminals. IC Role / Device Role / Timing Role: Low-power, byte-addressable nonvolatile storage interfaced to 8051 or ARM7-based host MCU. Use Value: 50 µA standby current extends battery life in backup-powered configurations; 3.3 V operation aligns with modern SoC I/O rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV200CTTI-12G | Same density (2 Mbit), 3.3 V, TSOP-48 package; 120 ns access, but requires different unlock sequence (AAh/55h/30h) | TSOP-48 footprint incompatible with PLCC-32; no boot block lockout feature | Choose only if board redesign accommodates 48-pin TSOP and firmware supports alternate command set |
| EN29LV200AB-12TIP | 2 Mbit, 3.3 V, PLCC-32; 120 ns access, same boot block structure, but lacks DATA polling on I/O7 | Relies solely on toggle-bit (I/O6) or timeout-based programming detection | Valid drop-in replacement for read/write functionality; verify host driver compatibility with polling method change |
Compared with MX29LV200CTTI-12G and EN29LV200AB-12TIP, the AT29LV020-12TI uniquely combines PLCC-32 packaging, dual boot block lockout, and I/O7 DATA polling - making it irreplaceable in legacy industrial systems where mechanical fit, security policy, and deterministic programming status reporting are jointly required.
Availability
AT29LV020-12TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded controller bootloader, and automotive diagnostic module code requiring stable component supply across extended product lifecycles.
Supply support for AT29LV020-12TI 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 belongs to Atmel's LV-series Flash memory product line, designed specifically for 3.3 V in-system programmability in space-constrained industrial and automotive control applications where reliability and long-term availability are critical.
FAQ
What is the operating temperature range for the AT29LV020-12TI?
The AT29LV020-12TI 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 official datasheet (Rev. 0565C). The "I" suffix in the part number explicitly denotes industrial grade, distinguishing it from commercial-grade variants like AT29LV020-12JC.
Does the AT29LV020-12TI support true 3.3 V-only operation without 5 V programming voltage?
Yes, the AT29LV020-12TI operates exclusively from a 3.3 V supply (3.0 V to 3.6 V) for both read and write functions. No external 5 V or 12 V programming voltage is required. Programming is enabled via a software unlock sequence applied to the standard address/data bus - a defining feature of the "LV" (Low Voltage) series.
How many sectors does the AT29LV020-12TI have, and what is the size of each sector?
The AT29LV020-12TI contains 1024 independent sectors, each exactly 256 bytes in size. This is explicitly stated in the Features section and reinforced in the Device Operation section describing sector-based programming. Sector addressing uses A8–A17, while A0–A7 select the byte within the sector.
Can the boot blocks on the AT29LV020-12TI be unlocked after programming lockout is enabled?
No, the boot block programming lockout on the AT29LV020-12TI is irreversible once activated. The datasheet states: "Once the programming lockout feature has been activated, the data in that block can no longer be erased or programmed." There is no documented command or procedure to disable lockout; it is a permanent hardware-enforced security feature.
What package type is used for the AT29LV020-12TI, and is it RoHS-compliant?
The AT29LV020-12TI uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32), identified by the "J" in the ordering code (e.g., "TI" = Industrial temperature, PLCC package). While the original 2002 datasheet predates RoHS enforcement, Microchip's current product change notices confirm legacy Atmel Flash devices-including AT29LV020-12TI-are manufactured in RoHS-compliant facilities using lead-free terminations.
AT29LV020-12TI 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:
- 120 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT29LV020-12TI FAQ
1.How can I place an order for AT29LV020-12TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV020-12TI 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 AT29LV020-12TI reliable?
The price and inventory of AT29LV020-12TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV020-12TI is usually 5 days.
3.What payment methods are accepted for AT29LV020-12TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV020-12TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV020-12TI?
AT29LV020-12TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV020-12TI 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 AT29LV020-12TI?
For technical support, including AT29LV020-12TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV020-12TI requirements.
6.How does Aetrix verify that AT29LV020-12TI is sourced from the original manufacturer or authorized distributors?
All AT29LV020-12TI 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 AT29LV020-12TI meets industry standards.
7.What is the process for return or replacement of AT29LV020-12TI?
All AT29LV020-12TI units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV020-12TI, 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 AT29LV020-12TI part is unused and in its original packaging.
Return procedure for AT29LV020-12TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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