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Microchip Technology AT29LV512-12TU
- Part No.:
- AT29LV512-12TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29LV512-12TU.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,477
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Product details
Overview
AT29LV512-12TU from Microchip Technology (formerly Atmel) is a 512 Kbit (64K × 8) 3.3V-only in-system Flash memory IC used for nonvolatile code/data storage in embedded microcontroller systems. It delivers 120 ns read access time, 20 ms max sector program cycle time, 15 mA active current, and operates across the industrial temperature range (–40°C to +85°C) in a 32-lead TSOP package.
For engineers reviewing the AT29LV512-12TU datasheet, AT29LV512-12TU pinout, AT29LV512-12TU application, or AT29LV512-12TU equivalent, key selection criteria include sector-based reprogrammability, software data protection compliance, CMOS/TTL I/O compatibility, and support for DATA polling and toggle-bit end-of-program detection in 3.3V-only systems.
Technical Context
The AT29LV512-12TU implements a sector-erase architecture with 512 independent 128-byte sectors, enabling selective reprogramming without full-chip erase. Its internal address/data latches capture 128 bytes at microprocessor speed, freeing the bus during autonomous erase-and-program execution controlled by an on-chip timer.
It supports dual programming enable methods-WE-controlled and CE-controlled byte loading-with strict timing constraints (e.g., ≤150 µs inter-byte load window). End-of-program detection is implemented via DATA polling on I/O7 and toggle-bit monitoring on I/O6, both usable at any point during the cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8), sufficient for boot code or firmware storage in resource-constrained MCU systems |
| Read Access Time | 120 ns - enables direct execution from flash (XIP) in real-time control applications |
| Sector Program Time | 20 ms max - defines minimum firmware update latency per 128-byte sector |
| VCC Supply Range | 3.0V to 3.6V - compatible with standard 3.3V logic rails without level translation |
| Active Current | 15 mA at 5 MHz - determines power budget impact during active read operations |
| Standby Current | 50 µA CMOS - enables low-power sleep modes in battery-backed or portable systems |
| Endurance | >10,000 write/erase cycles per sector - supports field firmware updates over product lifetime |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded deployment |
Pinout & Package
AT29LV512-12TU is packaged in a 32-lead Thin Small Outline Package (TSOP, Type 1), 8 mm × 20 mm footprint, compliant with JEDEC MO-142 BD. Pin 1 identifier located at top-left corner; leads are gull-wing, coplanarity ≤0.10 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface; A7–A15 select sector, A0–A6 select byte within sector |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path; supports true read/write and DATA polling on I/O7 |
| CE | Chip Enable | Active-low chip select; must be low for read or program; high disables outputs (high-Z) |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during reads |
| WE | Write Enable | Active-low write strobe; controls byte loading during sector programming |
| VCC | Power Supply | 3.3V ±0.3V supply; powers core logic and I/O drivers |
| GND | Ground | Reference return for all signals and power; decoupling required near VCC pin |
| NC | No Connect | Two pins (A12 and A15 positions in TSOP) are unconnected; must remain floating |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (AAh→55h→A0h) required before each sector program, preventing accidental writes during power transitions or noise events |
| Internal Sector Erase | Automatic erase of entire 128-byte sector prior to programming - no separate erase command needed |
| DATA Polling & Toggle Bit | Dual asynchronous end-of-program detection: I/O7 complements last loaded byte until completion; I/O6 toggles until final state |
| 3.3V-Only Operation | No external VPP or high-voltage programming supply required - simplifies PCB design and reduces BOM count |
| CMOS/TTL I/O Compatibility | Input thresholds (VIL = 0.6V, VIH = 2.0V) and output drive (VOH = 2.4V @ –100 µA) ensure interoperability with legacy 5V and modern 3.3V controllers |
| Green Packaging | Pb/Halide-free TSOP package compliant with RoHS Directive 2011/65/EU |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage device providing XIP-capable read access with 120 ns latency and sector-level field updates. Use Value: Enables secure, in-system firmware upgrades without chip removal while maintaining operation across –40°C to +85°C ambient conditions. | Use Scenario: Holding certified boot loader and safety-critical initialization routines in portable diagnostic equipment requiring long-term data integrity. IC Role / Device Role / Timing Role: Trusted boot memory with >10,000 endurance cycles and hardware/software write protection to prevent corruption. Use Value: Guarantees reliable startup after 10+ years of intermittent use, supported by 50 µA standby current for extended battery life. |
| Automotive Body Control Module | Networking Equipment Configuration |
Use Scenario: Storing calibration tables and feature-enable bits in body control units where ECU reflash capability is mandated. IC Role / Device Role / Timing Role: Field-upgradable Flash memory supporting JTAG- or CAN-based reprogramming protocols via sector erase. Use Value: Allows OEMs to deploy post-production feature unlocks and regulatory compliance patches using standardized 3.3V-only command sequences. | Use Scenario: Maintaining persistent configuration profiles (e.g., IP settings, VLAN maps) in managed switches and routers subject to frequent remote updates. IC Role / Device Role / Timing Role: Parameter storage with fast 20 ms sector writes and DATA polling for deterministic update status reporting. Use Value: Reduces reboot downtime during configuration changes by enabling atomic 128-byte sector updates without full-device reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF512-70-4C-NHE | 70 ns read access, 3.0–3.6V supply, same 512 Kbit density and TSOP-32 package | Lacks DATA polling; uses RY/BY# pin for ready/busy signaling instead of I/O7 complement | Select when faster read timing is critical and system design includes dedicated ready/busy pin routing |
| MX29LV512CTTI-12G | Same 120 ns access, 3.0–3.6V, 512 Kbit, TSOP-32; supports CFI query mode | Includes Common Flash Interface (CFI) for auto-detection; requires additional CFI-read initialization sequence | Choose for plug-and-play compatibility with CFI-aware BIOS/bootloaders in PC-104 or x86 embedded platforms |
Compared with SST39VF512-70-4C-NHE and MX29LV512CTTI-12G, the AT29LV512-12TU offers native software data protection without external hardware enablement and eliminates need for dedicated status pins or CFI initialization overhead - ideal for minimal-footprint MCU-based designs where pin count and firmware complexity are constrained.
Availability
AT29LV512-12TU is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics, automotive body control modules, and networking equipment requiring stable component supply and long-lifecycle support.
Supply support for AT29LV512-12TU 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
Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel Flash products including the AT29LV512 family.
The AT29LV512 product line was designed for cost-sensitive, space-constrained embedded systems needing reliable, in-system reprogrammable nonvolatile storage without high-voltage programming circuitry.
FAQ
What is the maximum sector program time for the AT29LV512-12TU?
The AT29LV512-12TU has a maximum sector program time of 20 ms, covering both automatic sector erase and simultaneous programming of the latched 128-byte data block. This value is characterized across voltage and temperature extremes and applies to all 512 sectors. The AT29LV512-12TU does not require external erase commands - the internal controller handles erase-before-write autonomously once the software unlock sequence is completed.
Does the AT29LV512-12TU support 5V-tolerant inputs?
Yes, the AT29LV512-12TU supports 5.5V-tolerant address and control inputs (A0–A15, CE, OE, WE) when operating from a 3.3V ±10% supply, allowing direct interfacing with 5V microcontrollers without level shifters. However, I/O0–I/O7 pins are limited to 0–3.6V and must not exceed VCC + 0.6V. This tolerance is specified in Section 4.4 of the datasheet and verified under DC operating conditions.
How does software data protection work on the AT29LV512-12TU?
Software data protection on the AT29LV512-12TU requires a precise three-byte unlock sequence: write AAh to address 5555h, then 55h to address 2AAAh, then A0h to address 5555h. Only after this sequence is accepted does the device enable sector programming. The AT29LV512-12TU retains protection state across power cycles, and any incomplete sequence triggers internal timers without altering memory contents.
Can the AT29LV512-12TU be used in place of an EPROM for code storage?
Yes, the AT29LV512-12TU is functionally compatible with standard EPROMs for read operations: CE and OE low with WE high asserts data on I/O0–I/O7 with identical timing (tACC = 120 ns). Unlike EPROMs, it supports in-system reprogramming without UV erasure or socket removal. The AT29LV512-12TU maintains EPROM-like read behavior while adding sector-based Flash flexibility.
What is the purpose of the NC pins on the AT29LV512-12TU TSOP package?
The AT29LV512-12TU TSOP package has two NC (No Connect) pins - located at positions corresponding to A12 and A15 in the pinout diagram. These pins are internally unconnected and must remain floating; they serve mechanical or package-standardization purposes and carry no electrical function. Routing traces or applying voltage to NC pins violates the device's Absolute Maximum Ratings and may cause malfunction.
AT29LV512-12TU 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:
- 512Kbit
- Memory Organization:
- 64K 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
AT29LV512-12TU FAQ
1.How can I place an order for AT29LV512-12TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV512-12TU 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 AT29LV512-12TU reliable?
The price and inventory of AT29LV512-12TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV512-12TU is usually 5 days.
3.What payment methods are accepted for AT29LV512-12TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV512-12TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV512-12TU?
AT29LV512-12TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV512-12TU 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 AT29LV512-12TU?
For technical support, including AT29LV512-12TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV512-12TU requirements.
6.How does Aetrix verify that AT29LV512-12TU is sourced from the original manufacturer or authorized distributors?
All AT29LV512-12TU 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 AT29LV512-12TU meets industry standards.
7.What is the process for return or replacement of AT29LV512-12TU?
All AT29LV512-12TU units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV512-12TU, 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 AT29LV512-12TU part is unused and in its original packaging.
Return procedure for AT29LV512-12TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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