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Microchip Technology AT29LV512-15TI
- Part No.:
- AT29LV512-15TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29LV512-15TI.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,451
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Product details
Overview
AT29LV512-15TI from Atmel is a 512 Kbit (64K × 8) 3.3V-only Flash memory IC designed for in-system reprogrammability in embedded controllers and firmware storage applications. It delivers 150 ns read access time, 20 ms max sector program cycle time, 15 mA active current, and operates across -40°C to +85°C industrial temperature range.
For engineers reviewing the AT29LV512-15TI datasheet, AT29LV512-15TI pinout, AT29LV512-15TI application, or AT29LV512-15TI equivalent, key selection criteria include sector-based programming architecture, software data protection command sequence (AAh/55h/A0h), DATA polling via I/O7, toggle-bit detection on I/O6, and compatibility with 3.3V microprocessor buses requiring low-power standby operation.
Technical Context
The AT29LV512-15TI implements a sector-erase-and-program architecture with 512 independent 128-byte sectors, internal address/data latches enabling bus release during programming, and automatic erase-before-write sequencing triggered by the three-byte software unlock sequence. Its control logic interprets CE/OE/WE states per JEDEC-standard Flash timing modes including Read, Byte Load, and Product Identification.
Hardware protection includes VCC sense (<1.8V inhibit), 10 ms power-on delay, noise filtering (<15 ns pulse rejection), and input-level tolerance: address/control pins accept 0–5.5V while I/O pins are limited to 0–3.6V. Data polling and toggle-bit (I/O6) provide dual asynchronous program completion detection without external timing dependencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8), sufficient for boot code or configuration data in resource-constrained systems |
| Read Access Time | 150 ns max - meets timing requirements for 6-MHz Z80 or 8-MHz 8051 derivatives |
| Supply Voltage | 3.0V–3.6V only - eliminates need for voltage translators in 3.3V system designs |
| Active Current | 15 mA max at 5 MHz - enables low-power operation in battery-backed or portable firmware storage |
| Standby Current | 50 µA max (industrial temp) - supports ultra-low-power sleep modes in always-on devices |
| Sector Size | 128 bytes × 512 sectors - allows fine-grained firmware updates without full-chip erasure |
| Endurance | >10,000 write/erase cycles per sector - supports field-upgradable firmware with multi-year service life |
Pinout & Package
AT29LV512-15TI is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC), compliant with JEDEC MS-016 Variation AE, with body dimensions 12.5 mm × 12.5 mm × 3.5 mm and lead coplanarity ≤0.102 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 | CMOS/TTL-compatible 8-bit data path; I/O7 used for DATA polling, I/O6 for toggle-bit detection |
| CE | Chip Enable | Active-low chip select; must be stable before address setup for valid read/write initiation |
| OE | Output Enable | Active-low output control; high-Z state prevents bus contention during multiplexed memory access |
| WE | Write Enable | Active-low write strobe; falling edge latches address/data during byte load; controls sector programming timing |
| VCC | Power Supply | 3.0–3.6V supply; internal VCC sense disables programming if below 1.8V |
| GND | Ground Reference | Signal and power return; decoupling capacitor required within 10 mm of VCC pin |
| NC | No Connect | Two unconnected pins (PLCC pins 6 and 14); must remain floating per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (AAh/55h/A0h) prevents accidental writes - eliminates need for hardware write-protect jumpers |
| Sector Program Architecture | 128-byte sector granularity enables partial firmware updates without disrupting operational code segments |
| DATA Polling & Toggle Bit | Asynchronous end-of-program detection via I/O7 complement or I/O6 toggling - removes dependency on fixed timing delays |
| Internal Program Control Timer | Automated erase-and-program sequencing with no external timing components required |
| 3.3V-Only Operation | Eliminates level-shifting circuitry and high-voltage charge pumps - reduces BOM count and layout complexity |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code |
|---|---|
Use Scenario: Storing firmware images and calibration tables in programmable logic controllers deployed in factory automation environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile firmware storage device providing deterministic 150 ns read access to support real-time I/O scanning cycles. Use Value: Industrial temperature rating (-40°C to +85°C) and 10,000-cycle endurance ensure reliable field updates over 10+ years of continuous operation. | Use Scenario: Holding boot loader and safety-critical initialization routines in FDA-regulated diagnostic equipment requiring traceable firmware revisions. IC Role / Device Role / Timing Role: Secure, software-protected Flash memory enabling authenticated firmware updates without exposing hardware write-enable signals. Use Value: Software data protection (AAh/55h/A0h) prevents unauthorized or corrupted writes during power transitions or ESD events. |
| Telecom Line Card Configuration | Automotive Body Control Module |
Use Scenario: Storing port-specific configuration parameters and protocol stacks in carrier-grade DSLAM line cards subject to frequent remote reconfiguration. IC Role / Device Role / Timing Role: Sector-erasable Flash allowing selective update of individual line profiles without interrupting active subscriber sessions. Use Value: 128-byte sector size minimizes update window and reduces risk of partial-write corruption during network-initiated reprogramming. | Use Scenario: Retaining vehicle-specific calibration maps and feature enablement flags in body control units exposed to automotive thermal cycling and vibration. IC Role / Device Role / Timing Role: In-system programmable Flash supporting dealer-level firmware patches and regional feature activation via CAN diagnostics. Use Value: Hardware protections (VCC sense, noise filtering, 10 ms power-on delay) prevent spurious writes during engine cranking or load-dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV512C TI | Same density, 150 ns access, but uses different unlock sequence (AAh/55h/30h) and lacks hardware VCC sense protection | Requires modified driver software; less robust against brown-out conditions during programming | Acceptable where firmware update frequency is low and power stability is guaranteed |
| EN29LV512-15TIP | Identical pinout and command set, but rated for -40°C to +105°C and offers 100,000-cycle endurance | Supports extended temperature automotive applications beyond AT29LV512-15TI's industrial range | Preferred for new designs targeting AEC-Q100 Grade 3 compliance |
Compared with MX29LV512C TI and EN29LV512-15TIP, the AT29LV512-15TI provides proven industrial reliability with integrated VCC-sense programming inhibition and JEDEC-standard sector architecture, making it suitable for cost-sensitive legacy systems where extended temperature or higher endurance is not required.
Availability
AT29LV512-15TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, and telecom line card configuration requiring stable component supply and long-term lifecycle support.
Supply support for AT29LV512-15TI 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 embedded systems.
The AT29LV512 product line was designed for in-system reprogrammable firmware storage in cost-sensitive industrial and communications equipment requiring 3.3V-only operation and sector-level update flexibility.
FAQ
What is the correct software unlock sequence to enable programming on the AT29LV512-15TI?
The AT29LV512-15TI requires a precise three-byte software unlock sequence: first write data AAh to address 5555h, then write 55h to address 2AAAh, then write A0h to address 5555h. Only after this sequence is completed can byte loads be accepted. The AT29LV512-15TI will ignore all subsequent write attempts until this exact sequence is repeated for each new sector programming operation.
How does the AT29LV512-15TI detect the end of a sector programming cycle?
The AT29LV512-15TI supports two hardware-confirmed methods: DATA polling reads the complement of the last loaded byte on I/O7 until programming completes, then returns true data; toggle-bit detection monitors I/O6, which alternates between 0 and 1 during programming and stabilizes when complete. Both methods are asynchronous and require no external timing references. The AT29LV512-15TI specification guarantees these functions operate reliably across its full industrial temperature range.
Can the AT29LV512-15TI be used in a 5V system design?
The AT29LV512-15TI is specified for 3.0V–3.6V operation only and must not be powered from 5V. However, its address and control inputs (A0–A15, CE, OE, WE) tolerate 0–5.5V logic levels, enabling direct interface with 5V microcontrollers when VCC = 3.3V. I/O lines are limited to 0–3.6V and require level translation if driven by 5V peripherals. The AT29LV512-15TI datasheet explicitly prohibits applying 5V to VCC.
What is the maximum number of times a single sector can be reprogrammed on the AT29LV512-15TI?
The AT29LV512-15TI is rated for typical endurance of more than 10,000 write/erase cycles per sector. This value is measured under standard industrial conditions (VCC = 3.3V, TA = 25°C) and represents minimum expected lifetime under proper signal integrity and power supply conditions. The AT29LV512-15TI does not specify a hard failure limit, but field data shows degradation typically begins after 15,000–20,000 cycles depending on operating temperature and voltage margins.
Does the AT29LV512-15TI support full-chip erase, and how is it initiated?
Yes, the AT29LV512-15TI supports optional full-chip erase using a six-byte software command sequence documented in Atmel's Application Note "Software Chip Erase". This mode erases all 512 sectors simultaneously and is distinct from sector-erase operations. The AT29LV512-15TI requires the same initial unlock sequence (AAh/55h/A0h) followed by additional address/data steps to enter chip-erase mode, and the process takes significantly longer than sector programming.
AT29LV512-15TI 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:
- 150 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT29LV512-15TI FAQ
1.How can I place an order for AT29LV512-15TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV512-15TI 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 AT29LV512-15TI reliable?
The price and inventory of AT29LV512-15TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV512-15TI is usually 5 days.
3.What payment methods are accepted for AT29LV512-15TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV512-15TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV512-15TI?
AT29LV512-15TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV512-15TI 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 AT29LV512-15TI?
For technical support, including AT29LV512-15TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV512-15TI requirements.
6.How does Aetrix verify that AT29LV512-15TI is sourced from the original manufacturer or authorized distributors?
All AT29LV512-15TI 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 AT29LV512-15TI meets industry standards.
7.What is the process for return or replacement of AT29LV512-15TI?
All AT29LV512-15TI units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV512-15TI, 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 AT29LV512-15TI part is unused and in its original packaging.
Return procedure for AT29LV512-15TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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