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Microchip Technology AT29C512-15JC
- Part No.:
- AT29C512-15JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT29C512-15JC.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,823
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Product details
Overview
AT29C512-15JC from Atmel is a 512 Kbit (64K × 8) 5-volt-only Flash memory IC designed for in-system reprogrammability in embedded firmware storage applications. It delivers 150 ns read access time, supports sector-based programming (512 sectors × 128 bytes), features hardware and software data protection, and operates across commercial temperature range (0°C to 70°C) in PLCC-32 package.
For engineers reviewing the AT29C512-15JC datasheet, AT29C512-15JC pinout, AT29C512-15JC application, or AT29C512-15JC equivalent, this page provides verified technical context, real-world use cases, pin-level design meaning, endurance and timing specifications, and validated alternative options for legacy system maintenance and industrial controller upgrades.
Technical Context
The AT29C512-15JC implements a sector-erase Flash architecture with internal latching of 128-byte pages during program cycles, enabling bus release for concurrent operations. Its dual-line chip enable (CE) and output enable (OE) control allows flexible bus contention management during read and byte-load sequences.
Programming is initiated via WE/CE pulse-controlled byte loads followed by automatic internal erase-and-program execution using an on-chip timer; end-of-cycle detection is supported via DATA polling on I/O7 or toggle-bit monitoring on I/O6 - both usable at any point during the 10 ms write cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8), sufficient for boot code or configuration data in microcontroller-based systems |
| Read Access Time | 150 ns max - defines minimum clock period for synchronous read interfaces |
| Program Cycle Time | 10 ms per sector - sets minimum latency for firmware updates or field calibration writes |
| VCC Supply | 5 V ± 10% - compatible with legacy 5V logic rails without level-shifting |
| Endurance | >10,000 program/erase cycles per sector - supports long-term field-upgradeable devices |
| Standby Current | 100 µA (CMOS) - enables low-power retention in battery-backed or intermittent-operation systems |
| Operating Temp | 0°C to 70°C - qualified for commercial-grade industrial control panels and instrumentation |
Pinout & Package
AT29C512-15JC is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32), pin-compatible with industry-standard 32J footprint. The package supports surface-mount assembly and offers robust thermal performance for board-level reliability in non-automotive industrial environments.
| 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 programming |
| 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 global select; must be low with OE low for read, high to enter standby or inhibit programming |
| OE | Output Enable | Active-low output control; high during programming to disable outputs and prevent bus conflict |
| WE | Write Enable | Active-low write strobe; controls byte loading and initiates internal program cycle when CE is also low |
| VCC / GND | Power Supply | Single 5V supply with CMOS/TTL-compatible I/O; no external VPP required for programming |
| NC | No Connect | Two unconnected pins (positions 6 and 9 in PLCC top view); must remain floating per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Sector Program Architecture | 512 independent 128-byte sectors enable partial firmware updates without full chip erase |
| Hardware Data Protection | VCC sense (<3.8 V inhibits write), 5 ms power-on delay, and noise filtering (<15 ns pulses ignored) |
| Software Data Protection | Three-byte unlock sequence (AA/55/A0) required before each program cycle; persists across power cycles |
| End-of-Write Detection | DATA polling (I/O7 complement → true data) or toggle-bit (I/O6 toggling → stable) - no external timer needed |
| CMOS/TTL Compatibility | Input thresholds (VIL = 0.8 V, VIH = 2.0 V) and output drive (VOH = 2.4 V @ –400 µA) support mixed-logic systems |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded Controller Boot Memory |
|---|---|
|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers where field updates are infrequent but critical. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped into microcontroller address space; accessed during power-on reset and firmware upgrade sequences. Use Value: 10,000-cycle endurance ensures >10 years of field service with quarterly updates; 150 ns access meets timing budgets of 8-bit/16-bit MCUs like Intel 8051 or Motorola 68HC11. |
Use Scenario: Providing boot code and calibration tables for aging medical device controllers requiring long-term component availability. IC Role / Device Role / Timing Role: Standalone Flash ROM replacing EPROMs in legacy designs; interfaced via standard parallel bus with CE/OE/WE handshaking. Use Value: 5V-only operation eliminates need for high-voltage programming circuitry; software protection prevents accidental overwrite during diagnostic mode. |
| Point-of-Sale Terminal Configuration | Test Equipment Calibration Data Storage |
|
Use Scenario: Holding localized language packs, tax tables, and peripheral driver settings in retail terminals deployed globally. IC Role / Device Role / Timing Role: Read-mostly memory updated only during firmware patches; sector granularity allows selective table replacement. Use Value: 128-byte sector size aligns with typical localization string blocks; 100 µA standby current extends battery life during overnight shutdown. |
Use Scenario: Storing factory-calibrated ADC/DAC coefficients and sensor linearization curves in benchtop test instruments. IC Role / Device Role / Timing Role: Secure, tamper-resistant nonvolatile storage accessed during instrument self-test and calibration routines. Use Value: Dual hardware + software protection prevents corruption during ESD-prone lab environments; DATA polling simplifies host MCU firmware logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29F040B-120EC | 4 Mbit (512K × 8), 120 ns access, requires 12 V VPP for programming | Higher density but incompatible voltage scheme; not drop-in for 5V-only systems | Select only if board supports VPP generation and higher capacity justifies redesign |
| MX29LV512CTTI-15G | 512 Kbit, 150 ns access, 3 V core with 5 V I/O tolerance, 100,000-cycle endurance | Lower power and higher endurance, but requires level translation or mixed-voltage design | Prefer for new designs targeting lower power; not suitable as direct replacement without schematic changes |
Compared with AM29F040B-120EC and MX29LV512CTTI-15G, the AT29C512-15JC uniquely supports true 5V-only in-system programming without VPP, maintains legacy PLCC-32 compatibility, and delivers verified 10,000-cycle endurance at 150 ns speed - making it the only viable option for maintaining existing 5V industrial control hardware.
Availability
AT29C512-15JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded controller boot memory, and test equipment calibration data storage requiring stable component supply and long-term obsolescence management.
Supply support for AT29C512-15JC 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 industrial and embedded markets.
The AT29C512 belongs to Atmel's legacy parallel-interface Flash memory product line, engineered for seamless EPROM replacement in 5V systems requiring field-upgradable firmware without high-voltage programming infrastructure.
FAQ
What is the maximum operating temperature range for the AT29C512-15JC?
The AT29C512-15JC is rated for commercial temperature operation from 0°C to 70°C. This specification is confirmed in the Ordering Information table on page 14 of the datasheet, where "-15JC" explicitly denotes the commercial-grade PLCC variant. It is not qualified for industrial (-40°C to +85°C) operation - that rating applies to suffixes ending in "JI" or "TI".
Does the AT29C512-15JC require external high-voltage programming signals?
No, the AT29C512-15JC does not require external high-voltage programming signals. As stated in the Features section and Device Operation description, it is a "5-volt only" Flash memory: all programming commands execute using standard 5V logic levels, with no VPP pin or external 12V source needed. This distinguishes AT29C512-15JC from earlier EPROMs and some competing Flash devices.
How many program/erase cycles is the AT29C512-15JC guaranteed for?
The AT29C512-15JC is specified for typical endurance of >10,000 program/erase cycles per sector, as documented in the Features section and reinforced in the Description on page 1. This value reflects sector-level wear; individual bytes within a sector share the same endurance budget, and exceeding 10,000 cycles risks data retention failure in affected sectors.
What package type does the AT29C512-15JC use, and is it lead-free?
The AT29C512-15JC uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32), designated "32J" in the Ordering Information table. Per Atmel's packaging documentation (page 15), this is a RoHS-compliant leaded package - the leads contain tin-lead solder alloy, not lead-free matte tin. Lead-free conversion was not implemented for this legacy PLCC variant.
Can the AT29C512-15JC be programmed in-circuit without removing it from the PCB?
Yes, the AT29C512-15JC supports true in-system programming (ISP). Its 5V-only command set, sector-based architecture, and DATA polling/toggle-bit status mechanisms allow full reprogramming while soldered on the target board - provided the host system asserts correct CE/OE/WE timing, supplies valid addresses and data, and monitors I/O7 or I/O6 to detect completion, as defined in the Device Operation section.
AT29C512-15JC 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:
- 10ms
- Access Time:
- 150 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT29C512-15JC FAQ
1.How can I place an order for AT29C512-15JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C512-15JC 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 AT29C512-15JC reliable?
The price and inventory of AT29C512-15JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C512-15JC is usually 5 days.
3.What payment methods are accepted for AT29C512-15JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C512-15JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C512-15JC?
AT29C512-15JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C512-15JC 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 AT29C512-15JC?
For technical support, including AT29C512-15JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C512-15JC requirements.
6.How does Aetrix verify that AT29C512-15JC is sourced from the original manufacturer or authorized distributors?
All AT29C512-15JC 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 AT29C512-15JC meets industry standards.
7.What is the process for return or replacement of AT29C512-15JC?
All AT29C512-15JC units undergo pre-shipment inspection (PSI). If there is an issue with AT29C512-15JC, 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 AT29C512-15JC part is unused and in its original packaging.
Return procedure for AT29C512-15JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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