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Microchip Technology AT29LV512-12JU
- Part No.:
- AT29LV512-12JU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT29LV512-12JU.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,013
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Product details
Overview
AT29LV512-12JU from Atmel is a 512 Kbit (64K × 8) 3.3 V-only in-system Flash memory with 120 ns read access time, 15 mA active current, and sector-based reprogrammability across 512 × 128-byte sectors. It operates over the industrial temperature range (−40°C to +85°C) and supports software data protection for secure in-field updates in embedded microcontroller boot code storage.
For engineers reviewing the AT29LV512-12JU datasheet, AT29LV512-12JU pinout, AT29LV512-12JU application, or AT29LV512-12JU equivalent, key selection criteria include sector erase granularity, DATA polling/toggle bit status detection, 3.3 V-only operation compatibility, and PLCC-32 packaging for legacy board layouts requiring robust thermal cycling performance.
Technical Context
The AT29LV512-12JU implements a sector-erase Flash architecture with internal address/data latches for 128-byte loads, automatic erase-before-program sequencing, and dual status detection via I/O7 DATA polling and I/O6 toggle bit. Its control logic requires no external high-voltage programming supply.
It uses a three-byte unlock sequence (AAh/55h/A0h at addresses 5555h/2AAAh/5555h) to enable sector programming, and supports hardware protections including VCC sense (<1.8 V inhibit), 10 ms power-on delay, and noise filtering on WE/CE inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8), sufficient for full microcontroller boot loader and configuration tables |
| Read Access Time | 120 ns max - enables direct execution from Flash in systems with ≤8.3 MHz bus timing |
| Supply Voltage | 3.0 V to 3.6 V only - eliminates level-shifting requirements in 3.3 V systems |
| Active Current | 15 mA max at 5 MHz - supports low-power operation during firmware reads |
| Standby Current | 50 µA CMOS - enables ultra-low quiescent power in sleep-mode embedded systems |
| Endurance | >10,000 program/erase cycles per sector - suitable for field-upgradable firmware with infrequent updates |
| Sector Size | 128 bytes × 512 sectors - allows fine-grained firmware patching without erasing entire device |
Pinout & Package
AT29LV512-12JU is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), JEDEC MS-016 variation AE, with 1.27 mm pitch, 12.45 mm × 14.95 mm body, and lead coplanarity ≤0.102 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus for full 64K-word addressing; A7–A15 select sector, A0–A6 select byte within sector |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; I/O7 used for DATA polling, I/O6 for toggle-bit status monitoring |
| CE | Chip Enable | Active-low chip select; must be low for read/write; high-Z output when high |
| 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 load timing and initiates sector programming |
| NC | No Connect | Pins 14, 15, 30, 31 are unconnected - must remain floating or grounded per layout guidelines |
| VCC | Power Supply | 3.0–3.6 V supply; internal VCC sense disables programming if below 1.8 V |
| GND | Ground | Reference for all I/O and internal logic; decoupling capacitor required near pin 16 |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence prevents accidental writes - critical for field-deployed systems where spurious noise could trigger reprogramming |
| Sector Program Operation | 128-byte granularity enables partial firmware updates without erasing unrelated code sections - reduces update window and risk of corruption |
| Internal Address/Data Latches | Latches full 128-byte sector at microprocessor speed - frees address/data bus for other tasks during internal erase/program cycle |
| DATA Polling & Toggle Bit | Dual asynchronous status reporting (I/O7 complement, I/O6 toggling) eliminates need for fixed delay timers - improves system responsiveness and reliability |
| Green Packaging | Pb/Halide-free PLCC-32 - meets RoHS compliance requirements for industrial and medical equipment without sacrificing thermal or mechanical robustness |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code |
|---|---|
Use Scenario: Storing firmware and calibration tables in programmable logic controllers deployed in factory automation environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic 120 ns read access to initialize FPGA and MCU subsystems at power-up. Use Value: Sector-level reprogrammability allows remote firmware patches without full device replacement - reducing maintenance downtime and service costs. | Use Scenario: Holding certified bootloader and safety-critical configuration data in portable diagnostic instruments requiring regulatory traceability and tamper resistance. IC Role / Device Role / Timing Role: Secure, software-protected Flash memory ensuring only authenticated firmware executes after power-on self-test. Use Value: 3.3 V-only operation eliminates voltage translation, while DATA polling guarantees precise timing for safety-critical startup sequences. |
| Telecom Base Station Control | Automotive Body Control Module |
Use Scenario: Storing protocol stacks and field-upgradable feature sets in outdoor telecom infrastructure operating continuously at −40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade Flash memory delivering stable 120 ns read latency under thermal stress and long-term bias conditions. Use Value: >10,000 endurance cycles support multi-year field upgrades without memory wear-out concerns in carrier-grade deployments. | Use Scenario: Retaining vehicle-specific configuration parameters and minor firmware patches in body control modules where space and thermal mass constrain package choice. IC Role / Device Role / Timing Role: PLCC-32 packaged Flash memory offering superior solder joint reliability vs. TSOP in thermally cycled automotive under-hood environments. Use Value: Robust mechanical footprint and 50 µA standby current extend battery life during vehicle sleep modes while enabling secure over-the-air updates. |
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 access time, 3.0–3.6 V, same 64K × 8 density and PLCC-32 package but uses different unlock sequence and lacks toggle bit | Higher speed read path suits real-time control loops; no toggle bit requires reliance on DATA polling only | Select when faster read timing is mandatory and status detection can be implemented via I/O7 alone |
| MX29LV512CTTI-12G | 120 ns access, 3.0–3.6 V, identical sector size and software protection, but TSOP-32 only - no PLCC option | Lower profile and better thermal dissipation in space-constrained designs; incompatible with existing PLCC footprints | Select for new designs prioritizing board height reduction and thermal management over legacy socket compatibility |
Compared with SST39VF512-70-4C-NHE and MX29LV512CTTI-12G, the AT29LV512-12JU uniquely combines PLCC-32 mechanical robustness, dual-status detection (polling + toggle), and documented industrial temperature reliability - making it optimal for retrofitting legacy systems requiring field upgrade capability without PCB redesign.
Availability
AT29LV512-12JU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, and telecom base station control requiring stable component supply across extended lifecycle programs.
Supply support for AT29LV512-12JU 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, Flash memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT29LV512 product line was designed specifically for in-system programmable nonvolatile storage in resource-constrained embedded systems requiring reliable, low-voltage Flash with sector-level granularity and robust status feedback mechanisms.
FAQ
What is the maximum read access time specified for the AT29LV512-12JU?
The AT29LV512-12JU has a maximum read access time of 120 ns, measured from address valid to valid data on I/O0–I/O7 when CE and OE are asserted low and WE is high. This timing is guaranteed across the full industrial temperature range (−40°C to +85°C) and 3.0–3.6 V supply, enabling direct execution from Flash in systems with ≤8.3 MHz bus clocks. The AT29LV512-12JU achieves this performance using Atmel's advanced nonvolatile CMOS process without requiring external wait states.
Does the AT29LV512-12JU support true 3.3 V-only operation for both read and write functions?
Yes, the AT29LV512-12JU performs all read and write operations using only a 3.0–3.6 V supply - no auxiliary high-voltage programming supply is needed. Its internal charge pump generates required programming voltages, and hardware protections (VCC sense, 10 ms power-on delay) ensure safe operation. Input levels tolerate 0–5.5 V on address/control pins, but I/O lines are limited to 0–3.6 V. The AT29LV512-12JU thus eliminates level shifters in 3.3 V systems while maintaining compatibility with mixed-voltage board designs.
How does software data protection work on the AT29LV512-12JU?
Software data protection on the AT29LV512-12JU requires a precise three-byte unlock sequence: write AAh to address 5555h, 55h to 2AAAh, then A0h to 5555h. Only after this sequence is completed can sector programming begin. Any invalid sequence resets protection. Power transitions do not clear the lock state. The AT29LV512-12JU enforces this at the silicon level - no external logic is needed. This mechanism prevents accidental writes due to noise or software glitches, making the AT29LV512-12JU suitable for unattended field-upgrade scenarios.
What package type is used for the AT29LV512-12JU, and what are its key mechanical features?
The AT29LV512-12JU uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package, designated "32J" per Atmel's ordering guide. It measures 12.45 mm × 14.95 mm with 1.27 mm lead pitch, conforms to JEDEC MS-016 variation AE, and features gull-wing leads with ≤0.102 mm coplanarity. Its robust construction provides superior thermal cycling reliability compared to TSOP packages - critical for industrial and automotive applications. The AT29LV512-12JU's PLCC footprint ensures long-term socket compatibility in legacy systems where board rework is cost-prohibitive.
Can the AT29LV512-12JU be erased at the full-chip level, or only by sector?
The AT29LV512-12JU supports both sector erase (default mode, 128 bytes) and optional full-chip erase via a separate six-byte software command sequence. Full-chip erase is useful during initial programming or recovery from corrupted sectors but takes significantly longer than sector erase. The AT29LV512-12JU automatically performs sector erase before programming - no explicit erase command is needed for sector writes. Both modes use the same software protection unlock sequence, ensuring consistent security enforcement regardless of erase scope.
AT29LV512-12JU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- 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-PLCC (13.97x11.43)
AT29LV512-12JU FAQ
1.How can I place an order for AT29LV512-12JU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV512-12JU 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 AT29LV512-12JU reliable?
The price and inventory of AT29LV512-12JU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV512-12JU is usually 5 days.
3.What payment methods are accepted for AT29LV512-12JU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV512-12JU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV512-12JU?
AT29LV512-12JU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV512-12JU 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 AT29LV512-12JU?
For technical support, including AT29LV512-12JU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV512-12JU requirements.
6.How does Aetrix verify that AT29LV512-12JU is sourced from the original manufacturer or authorized distributors?
All AT29LV512-12JU 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 AT29LV512-12JU meets industry standards.
7.What is the process for return or replacement of AT29LV512-12JU?
All AT29LV512-12JU units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV512-12JU, 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 AT29LV512-12JU part is unused and in its original packaging.
Return procedure for AT29LV512-12JU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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