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Microchip Technology AT29LV020-10TU-T
- Part No.:
- AT29LV020-10TU-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29LV020-10TU-T.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,588
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Product details
Overview
AT29LV020-10TU-T from Atmel is a 2-Mbit (256K × 8) 3.3V-only Flash memory IC used for nonvolatile code and data storage in embedded 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-T datasheet, AT29LV020-10TU-T pinout, AT29LV020-10TU-T application, or AT29LV020-10TU-T equivalent, key selection criteria include 3.3V-only operation, 100 ns read timing, sector erase/program architecture, boot block lockout capability, and TSOP-32 packaging compatibility with legacy 256K×8 Flash designs.
Technical Context
The AT29LV020-10TU-T implements a software-controlled sector programming model: a three-byte unlock sequence (AAh→55h→A0h at specific addresses) must precede each sector load, followed by up to 256 bytes loaded within 150 µs intervals. Internal latches capture address and data at microprocessor speed, enabling bus release during internal erase-and-program cycles.
It supports two hardware-protected programming inhibition mechanisms-VCC sense (<1.8V disables write) and noise filtering (<15 ns pulses ignored)-and provides dual end-of-program detection via DATA polling (I/O7 complement-to-data) and Toggle Bit (I/O6 toggling). Boot block lockout is activated via a seven-command sequence and disables chip erase when enabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 1024 sectors × 256 bytes |
| Read Access Time | 100 ns max - enables direct execution from Flash in 10 MHz+ microcontroller systems |
| Supply Voltage | 3.0 V to 3.6 V - single 3.3V rail compatible, no 5V or 12V required |
| Active Current | 15 mA max at 5 MHz - low power for battery-backed or portable applications |
| Standby Current | 50 µA CMOS - suitable for always-on firmware storage with minimal quiescent draw |
| Endurance | >10,000 program/erase cycles per sector - sufficient for field firmware updates over product lifetime |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded control and instrumentation |
Pinout & Package
AT29LV020-10TU-T is packaged in a 32-lead Thin Small Outline Package (TSOP Type I), 8 mm × 20 mm body, compliant with JEDEC MO-142 BD. Pin 1 is marked by a beveled corner; leads are gull-wing, coplanar ≤0.10 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; outputs valid during read, inputs latched on WE/CE falling edge during program |
| CE | Chip Enable | Active-low chip select; device deselected when high, entering CMOS standby (≤50 µA) |
| OE | Output Enable | Active-low output control; high-Z state prevents bus contention during shared-memory access |
| WE | Write Enable | Active-low write strobe; initiates byte load or triggers internal program cycle after unlock sequence |
| VCC | Power Supply | +3.3V ±0.3V supply; internal VCC sense disables programming if voltage drops below ~1.8V |
| GND | Ground | Reference return for all signals and power; decoupling capacitor required near VCC pin |
| NC | No Connect | Pin 16 (TSOP top view); must remain unconnected - not internally bonded |
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-up or noise events |
| Dual Boot Block Lockout | Independent 8K-byte upper/lower boot blocks; once locked, contents become read-only and chip erase is disabled - secures bootloader firmware |
| Internal Address/Data Latching | Full 256-byte sector address and data captured at microprocessor speed - frees system bus during 20 ms internal erase-and-program cycle |
| DATA Polling & Toggle Bit | I/O7 complement detection and I/O6 toggle provide real-time, non-intrusive program completion signaling - eliminates need for fixed delay timers |
| CMOS/TTL Input Compatibility | Inputs accept 0–5.5V logic levels while operating at 3.3V - simplifies interfacing with mixed-voltage microcontrollers and FPGAs |
Applications
| Industrial PLC Firmware Storage | Embedded Network Router Boot Code |
|---|---|
Use Scenario: Storing firmware and configuration 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 fast 100 ns read access enabling direct XIP (execute-in-place) execution from Flash by the controller's ARM Cortex-M core. Use Value: Dual boot blocks allow safe field updates: primary firmware runs from lower 8K while new version is written to upper 8K; lockout prevents corruption during power loss. | Use Scenario: Holding boot loader and initial network stack in residential broadband routers requiring secure, field-upgradable firmware. IC Role / Device Role / Timing Role: Boot ROM replacement with software lockout protecting critical initialization code from overwrite during OTA updates. Use Value: Sector-based programming allows incremental patching of TCP/IP stack modules without erasing entire image; 50 µA standby current extends uptime in always-on deployments. |
| Medical Diagnostic Instrument Calibration Data | Automotive Body Control Module Configuration |
Use Scenario: Retaining calibrated sensor offsets and linearization coefficients in portable ultrasound or ECG devices subject to periodic recalibration. IC Role / Device Role / Timing Role: Parameter EEPROM replacement with higher density and faster write throughput than serial EEPROMs. Use Value: 256-byte sector granularity matches typical calibration dataset size; software protection prevents unintended parameter reset during hot-plug diagnostics. | Use Scenario: Storing vehicle-specific configuration maps (e.g., door lock behavior, lighting profiles) in body control units where firmware must persist across battery disconnects. IC Role / Device Role / Timing Role: In-system reprogrammable NVM for post-production personalization and regional variant management. Use Value: 3.3V-only operation eliminates level-shifting circuitry; industrial temp rating ensures reliability under hood temperature cycling (-40°C to +85°C). |
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, 3.0–3.6V supply, same 2 Mbit density and TSOP-32 package | Lacks dedicated boot block lockout; uses uniform 4K-byte sectors instead of 256-byte sectors | Preferred when faster read timing is critical and boot security is managed externally via software or external logic |
| MX29LV200CTTI-70G | 70 ns read, 3.0–3.6V, 2 Mbit, TSOP-48 package (not pin-compatible) | Includes CFI-compliant command set and hardware reset pin; no boot block lockout | Chosen for CFI-based universal programmers or systems requiring hardware reset coordination during firmware update |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, the AT29LV020-10TU-T offers finer 256-byte sector granularity and hardware-enforced boot block protection-critical for safety-critical boot integrity-but trades off 30 ns slower read access and lacks CFI compliance for automated programmer recognition.
Availability
AT29LV020-10TU-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded network router boot code, and medical diagnostic instrument calibration data requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for AT29LV020-10TU-T 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 manufacturer specializing in microcontrollers, Flash memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT29LV020-10TU-T belongs to Atmel's legacy low-voltage Flash memory product line, designed specifically for 3.3V embedded systems needing reliable, in-system reprogrammable code storage with hardware-level boot protection.
FAQ
What is the maximum read access time specified for the AT29LV020-10TU-T?
The AT29LV020-10TU-T has a maximum read access time of 100 ns, measured from address valid to valid data on I/O0–I/O7 under industrial temperature conditions (–40°C to +85°C) and VCC = 3.0–3.6 V. This timing enables direct execution from Flash in systems with microcontrollers running at up to 10 MHz without wait states. The "-10" suffix in the part number explicitly denotes this 100 ns speed grade.
Does the AT29LV020-10TU-T require high-voltage programming signals?
No, the AT29LV020-10TU-T does not require high-voltage programming signals. It operates exclusively from a 3.0–3.6 V supply and uses only standard 3.3V logic levels for all control inputs (CE, OE, WE) and data I/O. Programming is initiated via a software unlock sequence (AAh/55h/A0h) followed by byte loads - eliminating the need for 12V VPP or external high-voltage generators.
How many sectors does the AT29LV020-10TU-T have, and what is the size of each sector?
The AT29LV020-10TU-T contains 1024 sectors, each 256 bytes in size. This sector structure supports granular firmware updates: modifying a single function module requires erasing and rewriting only its associated 256-byte sector, minimizing wear on unrelated memory regions. The AT29LV020-10TU-T datasheet confirms this organization as fundamental to its software data protection and internal latching architecture.
What is the purpose of the two boot blocks in the AT29LV020-10TU-T?
The AT29LV020-10TU-T includes two dedicated 8K-byte boot blocks - one at the lowest address (0x00000–0x01FFF) and one at the highest (0x3E000–0x3FFFF). Each can be independently locked via a software command sequence to prevent accidental erasure or reprogramming of critical bootloader code. Once locked, that block becomes read-only and chip erase is disabled - a hardware-enforced safeguard for system startup integrity.
Is the AT29LV020-10TU-T compatible with 5V-tolerant microcontrollers?
Yes, the AT29LV020-10TU-T supports 5V-tolerant inputs: address (A0–A17) and control (CE, OE, WE) pins accept 0–5.5V logic levels while operating from a 3.3V supply. Its I/O pins tolerate 0–3.6V. This allows direct connection to legacy 5V microcontrollers without level shifters, provided the microcontroller's output high level meets the AT29LV020-10TU-T's VIH minimum (2.0V) and output low meets VIL maximum (0.6V).
AT29LV020-10TU-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for AT29LV020-10TU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV020-10TU-T 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-T reliable?
The price and inventory of AT29LV020-10TU-T 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-T is usually 5 days.
3.What payment methods are accepted for AT29LV020-10TU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV020-10TU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV020-10TU-T?
AT29LV020-10TU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV020-10TU-T 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-T?
For technical support, including AT29LV020-10TU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV020-10TU-T requirements.
6.How does Aetrix verify that AT29LV020-10TU-T is sourced from the original manufacturer or authorized distributors?
All AT29LV020-10TU-T 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-T meets industry standards.
7.What is the process for return or replacement of AT29LV020-10TU-T?
All AT29LV020-10TU-T units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV020-10TU-T, 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-T part is unused and in its original packaging.
Return procedure for AT29LV020-10TU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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