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Microchip Technology AT29LV512-20JC
- Part No.:
- AT29LV512-20JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT29LV512-20JC.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,736
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Product details
Overview
AT29LV512-20JC from Atmel is a 512 Kbit (64K × 8) 3.3V-only Flash memory IC used for nonvolatile code and data storage in embedded systems. It features 200 ns read access time, sector-based reprogramming (512 sectors × 128 bytes), software data protection, and operates across commercial temperature range (0°C to 70°C) in a 32-lead PLCC package.
For engineers reviewing the AT29LV512-20JC datasheet, AT29LV512-20JC pinout, AT29LV512-20JC application, or AT29LV512-20JC equivalent, key selection criteria include sector erase granularity, 3V-only operation compatibility, DATA polling/Toggle Bit programming status detection, CMOS/TTL I/O compatibility, and industrial-grade standby current (50 µA).
Technical Context
The AT29LV512-20JC implements sector-level Flash architecture with internal address/data latching for 128-byte loads, enabling microprocessor-speed capture before autonomous erase-and-program execution. Its software data protection requires a three-byte command sequence (AAh/55h/A0h at specific addresses) to enable programming, preventing inadvertent writes during power transitions or noise events.
Hardware protection includes VCC sense (<1.8V inhibit), 10 ms power-on delay, and noise filtering (<15 ns pulse rejection on WE/CE). Read operation mirrors EPROM behavior: CE and OE low with WE high asserts data; outputs go high-impedance when CE or OE is high - supporting flexible bus contention management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8), sufficient for firmware boot code or configuration tables in resource-constrained controllers. |
| Read Access Time | 200 ns max - supports direct execution from Flash in 5 MHz bus systems without wait states. |
| Supply Voltage | 3.3V ± 0.3V only - eliminates need for 5V/12V programming supplies, simplifying power design. |
| Active Current | 15 mA max - enables low-power operation during active reads in battery-backed or portable applications. |
| Standby Current | 40 µA (commercial), 50 µA (industrial) - critical for maintaining long-term retention in always-on embedded nodes. |
| Endurance | 10,000 program/erase cycles per sector - supports field-upgradable firmware with moderate update frequency. |
| Sector Size | 128 bytes - allows fine-grained updates without erasing full device; reduces risk of corruption during partial rewrites. |
Pinout & Package
AT29LV512-20JC uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package, compliant with JEDEC MS-016 Variation AE, with body dimensions 12.47 mm × 14.05 mm × 3.56 mm (max height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus for accessing all 65,536 locations; A0–A6 select byte within 128-byte sector. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read data output or program data input; TTL/CMOS compatible. |
| CE | Chip Enable | Active-low chip select; must be low for read or program; high disables outputs and enters standby. |
| OE | Output Enable | Active-low control for data output; used with CE to manage bus contention during reads. |
| WE | Write Enable | Active-low signal initiating byte load or program cycle; toggling triggers DATA polling/Toggle Bit status checks. |
| VCC | Power Supply | 3.3V supply input; internal VCC sense circuitry inhibits programming if voltage drops below 1.8V. |
| GND | Ground Reference | Signal and power ground reference for all inputs, outputs, and internal logic. |
| NC | No Connect | Two unconnected pins (pins 6 and 10 in PLCC top view); must remain floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (AAh/55h/A0h) required before each sector program - prevents accidental writes during system reset or EMI events. |
| DATA Polling & Toggle Bit | I/O7 complement indicates programming progress; I/O6 toggles during erase/program - enables real-time status monitoring without external timers or interrupts. |
| Sector Program Architecture | 512 independent 128-byte sectors with internal latching - allows concurrent CPU operation while Flash executes autonomous erase-and-program cycles. |
| 3.3V-Only Operation | No high-voltage programming supply needed - eliminates charge pumps or external 12V generators, reducing BOM cost and board space. |
| Hardware Write Inhibit | VCC sense, 10 ms power-on delay, and noise filtering on WE/CE - ensures robustness against brown-out, power sequencing errors, and electrical noise. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing firmware images and calibration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; sector erase enables safe firmware patching without full device reload. Use Value: 10,000-cycle endurance and 50 µA industrial standby current ensure reliable operation over 10+ years in unattended deployments. | Use Scenario: Retaining patient-specific settings and regulatory-compliant device configurations in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter storage; software data protection prevents unauthorized or accidental configuration changes. Use Value: 3.3V-only operation integrates seamlessly with low-voltage medical SoCs; 128-byte sector granularity minimizes risk during safety-critical updates. |
| Automotive Body Control Module Boot Code | Networking Equipment Configuration EEPROM Replacement |
Use Scenario: Holding bootloader and CAN protocol stack initialization code in automotive body control units operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Primary boot memory mapped into MCU address space; 200 ns access time enables zero-wait-state execution. Use Value: Industrial temperature rating and hardware write inhibit meet AEC-Q100 reliability requirements for under-hood electronics. | Use Scenario: Replacing legacy EEPROMs in Ethernet switches and routers requiring faster write performance and higher density. IC Role / Device Role / Timing Role: Configuration storage with rapid sector rewrites; Toggle Bit status detection replaces slow polling loops used with EEPROM. Use Value: 20 ms max sector program time vs. 5–10 ms typical EEPROM byte writes - improves boot-time configuration loading efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF512 | Same density (512 Kbit), 3.3V operation, but 90 ns read access and 10 µs sector erase time; lacks Toggle Bit status reporting. | Preferred where faster read timing is critical and status polling is handled via software timeout rather than hardware flags. | Select SST39VF512 only if 90 ns access is required and system firmware can accommodate absence of Toggle Bit. |
| MX29LV512C | Pin-compatible PLCC variant with identical 200 ns read spec, but adds hardware reset pin (RESET#) and supports CFI query mode for auto-detection. | Suitable for new designs requiring standardized Flash interface detection or enhanced reset control during power-up sequences. | Choose MX29LV512C for future-proofing where CFI compliance or dedicated reset signaling improves system robustness. |
Compared with AT29LV512-20JC, SST39VF512 offers faster reads but removes hardware status feedback, increasing firmware complexity; MX29LV512C retains identical timing while adding CFI and RESET# - easing integration in multi-vendor Flash-aware platforms.
Availability
AT29LV512-20JC is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, automotive body electronics, and networking infrastructure requiring stable component supply and long-lifecycle support.
Supply support for AT29LV512-20JC 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 devices for embedded applications.
The AT29LV512 product line delivers 3.3V-only Flash memory optimized for in-system reprogrammability in space-constrained, low-power embedded systems requiring field-upgradable firmware and configuration data.
FAQ
What is the maximum read access time specified for the AT29LV512-20JC?
The AT29LV512-20JC has a maximum read access time of 200 ns, as indicated by the "-20" suffix in its part number. This specification applies across the commercial temperature range (0°C to 70°C) with VCC = 3.3V ± 0.3V. The value is characterized and guaranteed per the datasheet's AC Read Characteristics table, and it defines the delay from address stabilization or CE/OE assertion to valid data on I/O0–I/O7. This timing enables direct execution from Flash in systems with ≤5 MHz bus clocks.
Does the AT29LV512-20JC require high-voltage programming signals?
No, the AT29LV512-20JC does not require high-voltage programming signals. It operates exclusively from a 3.3V supply (3.0V to 3.6V) for both read and program operations. Programming is enabled only after issuing a three-byte software unlock sequence (AAh to address 5555h, 55h to 2AAAh, A0h to 5555h), eliminating the need for external 12V generators or charge pumps. This 3V-only architecture simplifies power design and enhances system reliability compared to older 5V Flash devices.
How many program/erase cycles is the AT29LV512-20JC rated for?
The AT29LV512-20JC is rated for a typical endurance of more than 10,000 program/erase cycles per sector. This specification reflects guaranteed minimum performance across the commercial temperature range and is validated per JEDEC standards. Endurance is specified per sector (128 bytes), meaning individual sectors may be rewritten up to 10,000 times independently without affecting adjacent sectors - supporting robust firmware update strategies in long-life embedded products.
What package type is used for the AT29LV512-20JC?
The AT29LV512-20JC uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package, designated as "32J" in Atmel's ordering information. Its mechanical dimensions conform to JEDEC MS-016 Variation AE, with a body size of approximately 12.47 mm × 14.05 mm and maximum height of 3.56 mm. Pin 1 is marked by a corner notch, and two pins (6 and 10) are designated NC (no connect) and must remain unconnected in PCB layout.
Can the AT29LV512-20JC be used in industrial temperature applications?
The AT29LV512-20JC is rated for commercial temperature range only (0°C to 70°C), as confirmed by the "C" suffix in its ordering code and the "Commercial" entry in the Ordering Information table. For industrial temperature operation (-40°C to +85°C), the correct variant is AT29LV512-20JI (same PLCC package) or AT29LV512-20TI (TSOP package). Using AT29LV512-20JC outside its specified temperature range may result in timing violations, data retention loss, or premature wear-out.
AT29LV512-20JC 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:
- 200 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT29LV512-20JC FAQ
1.How can I place an order for AT29LV512-20JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV512-20JC 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 AT29LV512-20JC reliable?
The price and inventory of AT29LV512-20JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV512-20JC is usually 5 days.
3.What payment methods are accepted for AT29LV512-20JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV512-20JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV512-20JC?
AT29LV512-20JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV512-20JC 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 AT29LV512-20JC?
For technical support, including AT29LV512-20JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV512-20JC requirements.
6.How does Aetrix verify that AT29LV512-20JC is sourced from the original manufacturer or authorized distributors?
All AT29LV512-20JC 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 AT29LV512-20JC meets industry standards.
7.What is the process for return or replacement of AT29LV512-20JC?
All AT29LV512-20JC units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV512-20JC, 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 AT29LV512-20JC part is unused and in its original packaging.
Return procedure for AT29LV512-20JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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