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Microchip Technology AT29LV020-10TU
- Part No.:
- AT29LV020-10TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29LV020-10TU.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,516
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Product details
Overview
AT29LV020-10TU from Atmel is a 2-Mbit (256K × 8) 3.3V-only Flash memory IC used for nonvolatile program storage in embedded microcontroller systems. It features 100 ns read access time, sector-based reprogramming (1024 × 256-byte sectors), software data protection, and dual 8K-byte boot blocks with independent programming lockout. It operates across the industrial temperature range (–40°C to +85°C) and supports in-system reprogramming without high-voltage supplies.
For engineers reviewing the AT29LV020-10TU datasheet, AT29LV020-10TU pinout, AT29LV020-10TU application, or AT29LV020-10TU equivalent, key selection considerations include sector erase granularity, boot block lockout behavior, DATA polling/toggle bit status detection, and compatibility with 3.3V-only microprocessor buses requiring CMOS/TTL-level I/O.
Technical Context
The AT29LV020-10TU implements a software-controlled sector programming architecture where each 256-byte sector must be fully loaded before internal auto-erase-and-program execution. It uses a three-byte unlock sequence (AAh/55h/A0h at specific addresses) to enable writes, and supports hardware protections including VCC sense (<1.8V inhibition), 10 ms power-on delay, and noise filtering on WE/CE inputs.
Read operation mirrors EPROM timing: CE and OE low with WE high enables output drive; bus contention is avoided via dual-line control. Status detection relies on DATA polling (I/O7 complement-to-data) or toggle-bit monitoring (I/O6 toggling during program/erase), both usable at any point during the cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K bytes for direct byte-addressable access |
| Supply Voltage | 3.0 V to 3.6 V only - eliminates need for 5 V or 12 V programming voltages |
| Read Access Time | 100 ns max - enables direct interface with 10 MHz microcontrollers without wait states |
| Sector Size | 256 bytes per sector - allows fine-grained firmware updates without full chip erase |
| Program Cycle Time | 20 ms typical per sector - deterministic timing for host software timeout handling |
| Endurance | >10,000 write/erase cycles per sector - supports field-upgradable firmware in industrial controllers |
| Standby Current | 50 µA CMOS - critical for low-power battery-backed or always-on embedded systems |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade environmental reliability |
Pinout & Package
AT29LV020-10TU is available in 32-lead TSOP (Type 1, package code 32T) - a surface-mount, thin-profile package measuring 20 mm × 8 mm with 0.5 mm lead pitch, suitable for high-density PCB layouts.
| 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 data path for read/write; supports DATA polling on I/O7 and toggle-bit detection on I/O6 |
| CE | Chip Enable | Active-low chip select - when high, places outputs in high-impedance state to prevent bus contention |
| OE | Output Enable | Active-low output control - used with CE to gate read data; must be high during programming |
| WE | Write Enable | Active-low write strobe - initiates byte load on falling edge; used with CE for software unlock sequences |
| NC | No Connect | Pin 16 in TSOP (A15 in PLCC layout) - must remain unconnected; no internal function |
| VCC | Power Supply | +3.3 V ±0.3 V supply - powers core logic and I/O; VCC sense circuitry inhibits programming if below 1.8 V |
| GND | Ground | Reference return for all signals and power - requires low-impedance PCB plane for stable read/write margins |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (5555h/2AAAh/5555h) required before every sector program - prevents accidental writes during power transients or noise events |
| Dual Boot Block Lockout | Independent 8K-byte upper/lower boot blocks can be permanently locked - secures bootloader code against overwrite while allowing application updates elsewhere |
| Internal Address/Data Latching | Latches full 256-byte sector data at microprocessor speed - frees address/data bus immediately after load, enabling concurrent host operations |
| DATA Polling & Toggle Bit | I/O7 complement-read and I/O6 toggling provide two independent, software-driven methods to detect program completion - eliminates need for external timers or status registers |
| Green Packaging | Pb/Halide-free TSOP package - compliant with RoHS Directive 2011/65/EU and JEDEC standard MO-142 |
Applications
| Industrial PLC Firmware Storage | Embedded Bootloader Memory |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers deployed in factory automation environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile program memory holding ladder logic executables and I/O mapping tables; accessed during cold start and runtime updates. Use Value: 100 ns read access ensures zero-wait-state execution on 10 MHz MCUs; sector erase enables partial firmware patching without disrupting operational logic. | Use Scenario: Hosting secure bootloader code in microcontroller-based medical devices requiring certified firmware integrity and field upgrade capability. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector; provides authenticated startup sequence and secure update handler. Use Value: Dual boot blocks allow one section to hold immutable bootloader (locked), while the other stores updatable application image - preventing corruption of critical startup code. |
| Telecom Base Station Configuration | Automotive Diagnostic Module Storage |
Use Scenario: Retaining calibration parameters, channel profiles, and protocol stacks in outdoor wireless base station remote units exposed to thermal cycling and humidity. IC Role / Device Role / Timing Role: Persistent configuration store accessed during initialization and dynamic reconfiguration; supports hot-swap updates via serial command interface. Use Value: >10,000 endurance cycles support frequent parameter tuning over 10+ year deployments; 50 µA standby current minimizes backup battery drain. | Use Scenario: Storing OBD-II diagnostic routines, sensor calibration offsets, and fault log history in vehicle service tools operating from 12 V automotive batteries. IC Role / Device Role / Timing Role: Local firmware repository for handheld diagnostic scanners interfacing with ECU CAN networks. Use Value: 3.3 V-only operation simplifies power design by eliminating level shifters; software protection prevents misprogramming during vehicle ignition transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV020C-10G | Same density (2 Mbit), 100 ns access, but uses different unlock sequence (AAh/55h/30h); lacks boot block lockout feature | Supports basic firmware storage but cannot protect bootloader sections - unsuitable where secure boot is required | Select only when boot block security is unnecessary and existing MXIC ecosystem integration exists |
| SST39VF200A-10-4C-NHE | 2 Mbit, 100 ns, 3.3 V supply; includes hardware write-protect pin (WP#) and single-byte programming mode | WP# pin enables simpler hardware-based protection; single-byte mode offers flexibility for small patches vs. AT29LV020-10TU's sector-only writes | Prefer when system-level hardware write control is preferred over software-only protection, or when mixed byte/sector updates are needed |
Compared with MX29LV020C-10G and SST39VF200A-10-4C-NHE, the AT29LV020-10TU uniquely combines dual boot block lockout with deterministic 20 ms sector programming and DATA polling - making it optimal for safety-critical embedded boot memory where firmware partitioning and verification are mandatory.
Availability
AT29LV020-10TU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded bootloader memory, and telecom base station configuration requiring stable component supply across extended product lifecycles.
Supply support for AT29LV020-10TU 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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs.
The AT29LV020-10TU belongs to Atmel's legacy LV-series Flash memory product line, designed specifically for 3.3 V embedded systems needing reliable, in-system reprogrammable storage with robust data protection and industrial temperature operation.
FAQ
What is the maximum operating temperature range for the AT29LV020-10TU?
The AT29LV020-10TU is rated for industrial temperature operation from –40°C to +85°C. This specification is validated per the manufacturer's DC and AC operating range table and applies to all functional parameters including read access time, program cycle time, and standby current. The device maintains full compliance with its 100 ns tACC and 20 ms tWC specifications across this entire range.
Does the AT29LV020-10TU require external high-voltage programming signals?
No, the AT29LV020-10TU does not require external high-voltage programming signals. It operates exclusively from a 3.0 V to 3.6 V supply and uses a software-controlled unlock sequence (5555h/2AAAh/5555h) to initiate sector programming. All erase and program functions are performed internally using charge pumps - no 12 V or 5 V auxiliary supplies are needed.
How many sectors does the AT29LV020-10TU have, and what is the size of each sector?
The AT29LV020-10TU contains 1024 sectors, each exactly 256 bytes in size. This sector organization is fixed and confirmed in the device description and sector program operation section. Sector addressing is handled via A8–A17, while A0–A7 select the byte offset within the sector during loading.
Can the boot blocks of the AT29LV020-10TU be unlocked after programming lockout is enabled?
No, the boot block programming lockout feature in the AT29LV020-10TU is irreversible once activated. The datasheet explicitly states that "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 or reverse the lockout for either the lower (00000h–01FFFh) or upper (3E000h–3FFFFh) 8K-byte boot block.
What are the two methods supported by the AT29LV020-10TU to detect end-of-program completion?
The AT29LV020-10TU supports two independent, software-accessible methods: DATA polling (monitoring complement-to-data on I/O7) and toggle-bit detection (observing toggling on I/O6). Both methods are valid at any time during the program cycle and do not require external hardware - enabling flexible, interrupt-driven or polling-based host firmware implementations for the AT29LV020-10TU.
AT29LV020-10TU 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
AT29LV020-10TU FAQ
1.How can I place an order for AT29LV020-10TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV020-10TU 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 AT29LV020-10TU reliable?
The price and inventory of AT29LV020-10TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV020-10TU is usually 5 days.
3.What payment methods are accepted for AT29LV020-10TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV020-10TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV020-10TU?
AT29LV020-10TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV020-10TU 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 AT29LV020-10TU?
For technical support, including AT29LV020-10TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV020-10TU requirements.
6.How does Aetrix verify that AT29LV020-10TU is sourced from the original manufacturer or authorized distributors?
All AT29LV020-10TU 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 AT29LV020-10TU meets industry standards.
7.What is the process for return or replacement of AT29LV020-10TU?
All AT29LV020-10TU units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV020-10TU, 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 AT29LV020-10TU part is unused and in its original packaging.
Return procedure for AT29LV020-10TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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