My Inquiry
My Account
Microchip Technology AT29LV512-15JI
- Part No.:
- AT29LV512-15JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT29LV512-15JI.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,647
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT29LV512-15JI 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 40 µA CMOS standby current across the industrial temperature range (–40°C to +85°C).
For engineers reviewing the AT29LV512-15JI datasheet, AT29LV512-15JI pinout, AT29LV512-15JI application, or AT29LV512-15JI equivalent, key selection criteria include sector-based 128-byte programming, software data protection with three-byte unlock sequence, DATA polling and toggle-bit end-of-program detection, and PLCC-32 packaging for legacy board compatibility.
Technical Context
The AT29LV512-15JI 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 internal erase-and-program cycles.
Operation relies on dual-line chip enable (CE) and output enable (OE) control for bus contention prevention, TTL/CMOS-compatible I/Os, and hardware safeguards including VCC sense (<1.8V inhibit), 10 ms power-on delay, and noise filtering (<15 ns pulse rejection) on WE/CE inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8) - supports firmware images up to 64 KB in byte-addressable configuration |
| Read Access Time | 150 ns - meets timing for 6.7 MHz bus operation with standard wait-state logic |
| Supply Voltage | 3.3 V ± 0.3 V - operates natively from single 3.3V rail; no 5V or 12V required |
| Active Current | 15 mA - enables low-power operation in battery-backed or energy-constrained systems |
| Standby Current | 40 µA (CMOS) - reduces quiescent power in sleep-mode embedded applications |
| Endurance | >10,000 write/erase cycles per sector - supports field firmware updates over product lifetime |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade deployment in harsh environments |
Pinout & Package
AT29LV512-15JI is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC), pin-compatible with JEDEC MS-016 Variation AE. The package features J-leads, 1.27 mm pitch, and a 12.4 mm × 12.4 mm body size with 3.3 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus; A7–A15 select sector (512 sectors), A0–A6 select byte within sector |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; outputs valid during read, inputs latched during byte load |
| CE | Chip Enable | Active-low device select; must be low for read/write; high disables outputs to high-Z |
| OE | Output Enable | Active-low read control; used with CE to prevent bus contention during shared-memory access |
| WE | Write Enable | Active-low write strobe; controls latching of data and initiation of sector programming |
| VCC | Power Supply | 3.3V supply input; includes internal VCC sense circuitry to inhibit programming below 1.8V |
| GND | Ground | Reference return path for all signals and power; decoupling recommended near pin |
| NC | No Connect | Two pins (A13/A14 positions in TSOP variant) are unconnected in PLCC; must remain floating |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (AAh→55h→A0h) prevents accidental writes; mandatory before any sector program |
| Sector Programming | 128-byte granularity enables partial updates without erasing unrelated firmware sections |
| DATA Polling & Toggle Bit | I/O7 complement indicates programming progress; I/O6 toggling provides hardware-agnostic end-of-cycle detection |
| Internal Program Control | On-chip timer and state machine handle erase-and-program sequencing; no external timing logic required |
| Hardware Write Inhibit | VCC sense, 10 ms power-on delay, and OE/CE/WE logic-level monitoring eliminate need for external reset supervision |
Applications
| Firmware Storage | Industrial Controller Boot Code |
|---|---|
Use Scenario: Storing boot loader and application firmware in programmable logic controllers (PLCs) requiring field-upgradable code. IC Role / Device Role / Timing Role: Nonvolatile storage for executable code executed directly by MCU after power-on reset. Use Value: Enables remote firmware patches via serial interface without replacing hardware or using external programmers. | Use Scenario: Holding configuration parameters and calibration data in HVAC control panels operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Retentive data storage with sector-level write protection to prevent corruption during brownout events. Use Value: 40 µA standby current extends battery backup life; software protection prevents unintended parameter overwrite. |
| Embedded BIOS/UEFI Module | Legacy Industrial HMI |
Use Scenario: Serving as BIOS flash in ruggedized single-board computers used in factory automation gateways. IC Role / Device Role / Timing Role: Read-accessible memory mapped at fixed address space; supports fast 150 ns reads during CPU fetch cycles. Use Value: 150 ns access time eliminates wait states for x86-compatible processors running at ≤6.7 MHz. | Use Scenario: Providing display firmware and font assets in operator terminals with PLCC socketed PCBs. IC Role / Device Role / Timing Role: Pin-compatible replacement for obsolete EPROMs in existing PLCC-32 footprints. Use Value: Direct drop-in upgrade path from UV-erasable EPROMs with identical pinout and 3.3V-only operation. |
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 uses 16-bit data bus and different command set; 90 ns read access | Requires PCB redesign for 16-bit bus and altered firmware driver; not pin-compatible | Select only if higher-speed read performance and 16-bit interface align with system architecture |
| MX29LV512C | Identical 512 Kbit × 8 organization, 150 ns access, PLCC-32 package, and software protection; endurance rated at 100K cycles | Pin-to-pin compatible with AT29LV512-15JI; same sector size and command protocol | Valid drop-in alternative where extended endurance (>10K cycles) is required without layout change |
Compared with SST39VF512, AT29LV512-15JI offers native 8-bit bus compatibility and proven legacy integration; versus MX29LV512C, it trades higher endurance for established qualification history in industrial control deployments.
Availability
AT29LV512-15JI is available at Aetrix Electronics and suitable for industrial controller boot code, embedded BIOS modules, and legacy HMI firmware storage requiring stable component supply and long-term obsolescence management.
Supply support for AT29LV512-15JI 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, nonvolatile memory, and secure authentication devices.
The AT29LV512 product line was developed for cost-sensitive, in-system programmable firmware storage in industrial and automotive control systems where reliability, sector-level update capability, and 3.3V-only operation are essential.
FAQ
What is the maximum sector program cycle time for AT29LV512-15JI?
The AT29LV512-15JI has a maximum sector program cycle time of 20 ms. This includes both internal sector erase and programming phases. The value is guaranteed across the full industrial temperature range (–40°C to +85°C) and applies to any of its 512 sectors, each holding 128 bytes. AT29LV512-15JI achieves this with fully autonomous internal timing-no external clocks or handshaking required.
Does AT29LV512-15JI support hardware reset-based write protection?
No, AT29LV512-15JI does not use hardware reset for write protection. Instead, it implements software data protection requiring a precise three-byte unlock sequence (AAh → 55h → A0h) before any sector programming. Hardware safeguards include VCC sense (inhibits programming below ~1.8V), 10 ms power-on delay, and noise filtering on WE/CE inputs-but no dedicated reset pin or hardware lock mechanism exists. AT29LV512-15JI relies entirely on command-based security.
Can AT29LV512-15JI be used with a 5V-tolerant microcontroller interface?
Yes, AT29LV512-15JI accepts 5.5V-tolerant address and control inputs (A0–A15, CE, OE, WE) when powered from 3.3V, allowing direct connection to 5V-tolerant MCU GPIOs. However, its I/O0–I/O7 pins are limited to 0–3.6V and must not exceed VCC + 0.6V. Therefore, level-shifting is required for bidirectional data lines if the MCU drives outputs above 3.6V. AT29LV512-15JI's input tolerance simplifies address/control interfacing but does not extend to data pins.
What is the purpose of the NC pins on AT29LV512-15JI's PLCC package?
AT29LV512-15JI's PLCC-32 package includes two NC (No Connect) pins-located at positions corresponding to A13 and A14 in the TSOP variant-to maintain mechanical symmetry and pin count compatibility across package types. These pins are electrically isolated and must remain unconnected on the PCB. They serve no functional role in AT29LV512-15JI operation and do not require termination or grounding. Their presence ensures consistent footprint design across Atmel's Flash memory family.
How does DATA polling work on AT29LV512-15JI during programming?
During programming, AT29LV512-15JI asserts the complement of the last loaded data byte on I/O7. When the sector program completes, I/O7 returns to true data. Engineers poll I/O7 after initiating a write: repeated reads returning inverted data indicate ongoing programming; stable true data confirms completion. This method works at any time during the cycle and requires no additional hardware. AT29LV512-15JI supports this feature across all operating conditions without external components.
AT29LV512-15JI 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:
- 150 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)
AT29LV512-15JI FAQ
1.How can I place an order for AT29LV512-15JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV512-15JI 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 AT29LV512-15JI reliable?
The price and inventory of AT29LV512-15JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV512-15JI is usually 5 days.
3.What payment methods are accepted for AT29LV512-15JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV512-15JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV512-15JI?
AT29LV512-15JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV512-15JI 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 AT29LV512-15JI?
For technical support, including AT29LV512-15JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV512-15JI requirements.
6.How does Aetrix verify that AT29LV512-15JI is sourced from the original manufacturer or authorized distributors?
All AT29LV512-15JI 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 AT29LV512-15JI meets industry standards.
7.What is the process for return or replacement of AT29LV512-15JI?
All AT29LV512-15JI units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV512-15JI, 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 AT29LV512-15JI part is unused and in its original packaging.
Return procedure for AT29LV512-15JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT29LV512-15JI 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…
