My Inquiry
My Account
Microchip Technology AT29LV512-12JU-T
- Part No.:
- AT29LV512-12JU-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT29LV512-12JU-T.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,366
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT29LV512-12JU-T 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 firmware storage applications.
For engineers reviewing the AT29LV512-12JU-T datasheet, AT29LV512-12JU-T pinout, AT29LV512-12JU-T application, or AT29LV512-12JU-T equivalent, key selection considerations include sector-program timing (≤20 ms), DATA polling/Toggle Bit end-of-write detection, CMOS/TTL-compatible I/O, and PLCC-32 packaging with verified 3.3 V-only operation - critical for legacy microcontroller boot memory and FPGA configuration storage designs.
Technical Context
The AT29LV512-12JU-T implements a nonvolatile Flash architecture with internal address/data latches enabling 128-byte sector loading at microprocessor speed, followed by automatic erase-and-program execution. Its control logic relies on three-volt-only command sequences (e.g., 5555h/2AAAh/A0h) to initiate programming without external high-voltage supplies.
Hardware protection includes VCC sense (<1.8 V inhibit), 10 ms power-on delay, OE/CE/WE state-dependent program inhibition, and 15 ns noise filtering on WE/CE inputs. Input levels tolerate 0–5.5 V on address/control pins while I/O lines are limited to 0–3.6 V, supporting mixed-voltage system interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8), sufficient for boot code or FPGA configuration bitstreams in space-constrained embedded systems |
| Read Access Time | 120 ns max - enables direct execution from Flash (XIP) in 8-bit microcontrollers running ≤8 MHz |
| Supply Voltage | 3.3 V ±0.3 V only - eliminates need for voltage translators in 3.3 V logic domains |
| Active Current | 15 mA at 5 MHz - supports low-power operation during firmware reads in battery-backed systems |
| Standby Current | 50 µA CMOS - enables multi-year retention in always-on monitoring devices |
| Sector Size | 128 bytes per sector - allows fine-grained firmware patching without erasing full device |
| Endurance | >10,000 write/erase cycles per sector - suitable for field-upgradable firmware with infrequent updates |
Pinout & Package
AT29LV512-12JU-T is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), JEDEC MS-016 variation AE compliant, with 12.32 mm × 14.86 mm footprint and 1.27 mm lead pitch. Pin 1 identifier is marked by a corner notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus supporting full 64K-word addressing; A7–A15 define sector address during byte load |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; I/O7 used for DATA polling, I/O6 for Toggle Bit status indication |
| CE | Chip Enable | Active-low chip select; must be stable before address setup; inhibits programming when high |
| OE | Output Enable | Active-low output control; high-Z state prevents bus contention during writes or standby |
| WE | Write Enable | Active-low write strobe; controls latching of address/data during sector programming |
| NC | No Connect | Two unconnected pins (PLCC positions 29 and 30); must remain floating per datasheet |
| VCC | Power Supply | 3.3 V ±0.3 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 within 10 mm of VCC pin |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-command sequence (5555h/2AAAh/A0h) required before each sector program - prevents accidental firmware corruption during power transients |
| Internal Sector Erase | Automatic erase prior to programming eliminates separate erase command - simplifies host firmware and reduces update latency |
| DATA Polling & Toggle Bit | Dual end-of-write detection (I/O7 complement read + I/O6 toggle) enables robust polling without timer dependencies in real-time systems |
| 3.3 V-Only Operation | No external 12 V or 5 V programming voltage needed - reduces BOM count and PCB routing complexity |
| Green Packaging | Pb/Halide-free PLCC-32 package - complies with RoHS Directive 2011/65/EU without requiring process requalification |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Boot Memory |
|---|---|
|
Use Scenario: Storing firmware images for programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding startup code and runtime configuration parameters accessed at power-on reset. Use Value: 120 ns read access ensures deterministic boot timing; 50 µA standby current extends uptime during brown-out conditions. |
Use Scenario: Providing executable code storage for 8-bit MCUs (e.g., 8051 derivatives) in cost-sensitive consumer electronics. IC Role / Device Role / Timing Role: XIP-capable Flash memory mapped into MCU address space for direct instruction fetch. Use Value: Sector-level reprogrammability enables field updates without full chip erase - critical for post-deployment bug fixes. |
| FPGA Configuration Storage | Medical Device Parameter Retention |
|
Use Scenario: Holding bitstream configuration data for SRAM-based FPGAs in diagnostic imaging equipment. IC Role / Device Role / Timing Role: Serial or parallel configuration PROM replacement with in-system reprogrammability. Use Value: 10,000-cycle endurance supports multiple FPGA reconfiguration events during device calibration and service. |
Use Scenario: Retaining calibrated sensor offsets and user preferences in portable ECG monitors with battery backup. IC Role / Device Role / Timing Role: Low-power nonvolatile parameter store accessed infrequently but requiring long-term data integrity. Use Value: 50 µA CMOS standby current minimizes battery drain over multi-year shelf life; green packaging meets medical RoHS requirements. |
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), 3.3 V operation, but 90 ns access time and 100 µA standby current | Higher performance read path but higher quiescent power - less suitable for battery-powered devices | Select SST39VF512 only when sub-100 ns access is mandatory and power budget allows ≥2× standby current |
| MX29LV512C | Pin-compatible PLCC-32, same 120 ns access, but requires 5 V for reset recovery and lacks hardware VCC-sense protection | Less robust against brown-out conditions; not recommended for systems with unstable 3.3 V rails | Prefer AT29LV512-12JU-T where reliable in-system programming under marginal VCC is required |
Compared with SST39VF512 and MX29LV512C, the AT29LV512-12JU-T delivers optimal balance of industrial-grade reliability (VCC-sense, noise filtering), ultra-low standby power (50 µA), and proven sector-program robustness - making it the preferred choice for safety-critical or energy-constrained embedded firmware storage.
Availability
AT29LV512-12JU-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller boot memory, and FPGA configuration storage requiring stable component supply and long-term lifecycle support.
Supply support for AT29LV512-12JU-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 embedded systems.
The AT29LV512 product line was designed specifically for in-system programmable Flash memory applications in industrial and automotive-adjacent embedded systems requiring 3.3 V-only operation and robust data retention.
FAQ
What is the maximum operating temperature range for the AT29LV512-12JU-T?
The AT29LV512-12JU-T is rated for industrial temperature operation from –40°C to +85°C. This range is validated per the datasheet's DC and AC operating specifications and applies to all functional modes including read, program, and standby. The device uses Atmel's advanced nonvolatile CMOS process to maintain timing and endurance across this full range. AT29LV512-12JU-T must not be operated outside these limits to guarantee specified tACC (120 ns), ICC (15 mA), or ISB1 (50 µA) performance.
Does the AT29LV512-12JU-T require external high-voltage programming signals?
No, the AT29LV512-12JU-T performs all programming operations using only its 3.3 V supply - no external 5 V, 12 V, or other high-voltage signals are needed. Programming is initiated via a three-byte software command sequence (5555h/2AAAh/A0h) applied to the address/data bus, followed by sector data loading. Internal charge pumps generate necessary voltages, enabling true in-system reprogramming with standard logic-level signals. AT29LV512-12JU-T's design eliminates the need for dedicated programming hardware or voltage translators.
How does the AT29LV512-12JU-T indicate completion of a sector program cycle?
The AT29LV512-12JU-T provides two hardware-supported methods: DATA polling on I/O7 (complement of last loaded byte until completion) and Toggle Bit detection on I/O6 (toggling between 0/1 during programming, then stabilizing). Both methods allow host firmware to poll asynchronously without timers. The AT29LV512-12JU-T guarantees detection within the specified tWC (20 ms max), and polling may begin immediately after initiating the program cycle. These features are integral to the AT29LV512-12JU-T's architecture and require no additional components.
Is the AT29LV512-12JU-T pin-compatible with other 32-lead PLCC Flash memories?
The AT29LV512-12JU-T follows standard PLCC-32 pinout conventions for parallel Flash (A0–A15, I/O0–I/O7, CE/OE/WE, VCC/GND), but pin compatibility with other vendors' devices is not guaranteed. While MX29LV512C shares identical pin assignment and sector architecture, SST39VF512 uses different command protocols and timing - requiring firmware adaptation. Always verify signal timing, voltage tolerances, and command set against the target alternative's datasheet before substitution. AT29LV512-12JU-T's NC pins (positions 29/30) must remain unconnected per design.
What is the endurance specification for the AT29LV512-12JU-T, and how is it measured?
The AT29LV512-12JU-T guarantees typical endurance of >10,000 write/erase cycles per sector, tested per JEDEC standards using full-sector erase-and-program sequences under industrial temperature conditions. Endurance is not rated for individual bytes or partial sectors - each cycle affects the entire 128-byte sector. Wear leveling must be implemented in host firmware if uniform usage across sectors is required. This specification applies to AT29LV512-12JU-T across its full operating voltage (3.0–3.6 V) and temperature range, with data retention exceeding 20 years after final programming.
AT29LV512-12JU-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for AT29LV512-12JU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV512-12JU-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 AT29LV512-12JU-T reliable?
The price and inventory of AT29LV512-12JU-T 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-T is usually 5 days.
3.What payment methods are accepted for AT29LV512-12JU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV512-12JU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV512-12JU-T?
AT29LV512-12JU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV512-12JU-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 AT29LV512-12JU-T?
For technical support, including AT29LV512-12JU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV512-12JU-T requirements.
6.How does Aetrix verify that AT29LV512-12JU-T is sourced from the original manufacturer or authorized distributors?
All AT29LV512-12JU-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 AT29LV512-12JU-T meets industry standards.
7.What is the process for return or replacement of AT29LV512-12JU-T?
All AT29LV512-12JU-T units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV512-12JU-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 AT29LV512-12JU-T part is unused and in its original packaging.
Return procedure for AT29LV512-12JU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT29LV512-12JU-T Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
