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Microchip Technology AT29C512-15PC
- Part No.:
- AT29C512-15PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT29C512-15PC.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,254
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Product details
Overview
AT29C512-15PC from Atmel is a 512 Kbit (64K × 8) in-system programmable Flash memory IC designed for embedded nonvolatile storage in microcontroller-based systems, industrial controllers, and firmware update modules. It features 70 ns read access time, 5 V ±10% single-supply operation, 10,000 write/erase cycles per sector, and hardware/software data protection. Its 512-sector architecture (128 bytes/sector) supports reliable field reprogramming without high-voltage programming circuitry.
For engineers reviewing the AT29C512-15PC datasheet, AT29C512-15PC pinout, AT29C512-15PC application, or AT29C512-15PC equivalent, key selection considerations include its 150 ns maximum access time, CMOS/TTL-compatible I/O, 100 µA standby current, sector-based reprogrammability, and compatibility with standard EPROM read protocols in legacy designs.
Technical Context
The AT29C512-15PC implements a sector-erase Flash architecture with internal address/data latches for 128-byte pages and an autonomous internal timer for erase-and-program sequencing. It uses standard parallel bus control signals (CE, OE, WE) and supports both hardware- and software-initiated chip/sector operations.
Its dual data protection scheme includes voltage-sensing hardware inhibit (VCC < 3.8 V blocks programming) and a three-byte software unlock sequence (5555h/2AAAh/A0h) to enable writes. Data polling (I/O7 complement) and toggle-bit (I/O6) methods provide deterministic end-of-program detection without external timing dependencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8), organized as 512 sectors of 128 bytes each - enables granular firmware updates without full-chip erasure. |
| Read Access Time | 150 ns max - meets timing requirements for 6–7 MHz microcontroller bus interfaces with standard wait-state logic. |
| Supply Voltage | 5 V ±10% - eliminates need for dedicated programming voltage rails; compatible with legacy 5 V logic systems. |
| Write Cycle Time | 10 ms per sector - defines minimum interval between successive sector programming commands. |
| Endurance | >10,000 program/erase cycles per sector - supports long-term field firmware revision in industrial controllers. |
| Standby Current | 100 µA (CMOS, commercial temp) - enables low-power retention in battery-backed or energy-constrained applications. |
| Operating Temp | 0°C to +70°C - qualified for commercial-grade embedded equipment including test instruments and peripheral controllers. |
Pinout & Package
AT29C512-15PC is packaged in a 32-pin Plastic Dual Inline Package (PDIP), 0.600" wide (package code 32P6), with through-hole mounting and industry-standard pin spacing (2.54 mm).
| 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 data path; I/O7 used for DATA polling, I/O6 for toggle-bit status during programming. |
| CE | Chip Enable | Active-low chip select; must be low for read/write access; high state forces outputs to high-impedance. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention; must be high during programming. |
| WE | Write Enable | Active-low write strobe; controls byte loading and initiates sector programming when CE is low and OE is high. |
| VCC | Power Supply | +5 V ±10% supply input; powers core logic and I/O buffers; internal VCC sense disables programming if below 3.8 V. |
| GND | Ground Reference | Signal and power ground reference for all inputs, outputs, and internal circuitry. |
| NC | No Connect | Unbonded pins (positions 6, 9, 10, 17, 20 on PDIP); must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5 V Reprogramming | Eliminates need for +12 V programming supplies - simplifies system power design and enables in-circuit updates via standard logic-level signals. |
| Sector Program Architecture | 512 independent 128-byte sectors allow partial rewrites - critical for over-the-air firmware patching without disrupting active code regions. |
| Hardware Data Protection | VCC sensing, 5 ms power-on delay, and noise filtering (<15 ns pulse rejection) prevent accidental writes during power transients or EMI events. |
| Software Data Protection | Three-byte unlock sequence (5555h/2AAAh/A0h) required before any sector write - prevents unintended firmware corruption by host software bugs. |
| DATA Polling & Toggle Bit | Real-time, bus-synchronous programming status feedback using I/O7 complement or I/O6 toggling - removes dependency on fixed timing delays in host firmware. |
Applications
| Industrial PLC Firmware Storage | Legacy Instrumentation Boot Memory |
|---|---|
Use Scenario: Storing ladder logic and configuration data in programmable logic controllers requiring field-upgradable firmware without hardware rework. IC Role / Device Role / Timing Role: Nonvolatile boot and parameter storage accessed via 8-bit parallel bus; 150 ns access supports 6.67 MHz bus clock with zero wait states. Use Value: Sector erase allows updating only modified function blocks while preserving calibration tables and I/O mapping in adjacent sectors. |
Use Scenario: Replacing UV-erasable EPROMs in aging test equipment where board space and socket compatibility are constrained. IC Role / Device Role / Timing Role: Drop-in EPROM replacement with identical pinout and read protocol; CE/OE dual-control matches legacy address decoder logic. Use Value: Eliminates UV eraser dependency and enables in-system firmware patches during calibration or compliance updates. |
| Embedded Controller Configuration Store | Communications Module Parameter Bank |
Use Scenario: Holding device-specific settings (baud rate, network ID, sensor offsets) in HVAC controllers subject to frequent field commissioning. IC Role / Device Role / Timing Role: Low-power configuration EEPROM alternative; 100 µA standby current extends battery life in maintenance-free installations. Use Value: Software data protection prevents misconfiguration during power cycling, and sector granularity avoids rewriting entire parameter sets. |
Use Scenario: Storing protocol stacks and channel profiles in RS-485 gateway modules deployed across distributed SCADA networks. IC Role / Device Role / Timing Role: Firmware partition storage accessed during boot and runtime; 10,000-cycle endurance supports multi-year remote firmware upgrades. Use Value: Hardware VCC-sense protection ensures integrity during brown-out conditions common in industrial power environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29F512-150EC | 5 V-only, 512 Kbit, 150 ns access, but requires 12 V for programming and lacks software data protection. | Not suitable for true in-system reprogramming; requires external high-voltage generator and PCB layout changes. | Select only if legacy AM29F family compatibility is mandatory and high-voltage generation is already present. |
| MX29F512TC-15 | 5 V-only, 512 Kbit, 150 ns access, same sector size, but uses different software unlock sequence (AAA/555/A0) and has 200 µA standby current. | Pin-compatible with AT29C512-15PC in PDIP package; supports identical read protocol but requires firmware adaptation for unlock sequence. | Preferred for new designs needing second-source availability; verify timing margins due to higher standby current. |
Compared with AM29F512-150EC, AT29C512-15PC eliminates high-voltage programming infrastructure; compared with MX29F512TC-15, it offers lower standby power and proven software protection robustness in long-lifecycle industrial deployments.
Availability
AT29C512-15PC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy instrumentation boot memory, and embedded controller configuration store applications requiring stable component supply and long-term obsolescence management.
Supply support for AT29C512-15PC 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, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT29C512-15PC belongs to Atmel's legacy parallel-interface Flash memory product line, engineered for seamless EPROM replacement and in-system firmware upgradability in cost-sensitive, long-lifecycle embedded systems.
FAQ
What is the maximum operating temperature range for the AT29C512-15PC?
The AT29C512-15PC is rated for commercial temperature operation from 0°C to +70°C. It is not specified for industrial temperature range (–40°C to +85°C); that rating applies to variants ending in 'I' (e.g., AT29C512-15PI). Using AT29C512-15PC outside 0°C–70°C may result in undefined timing or reliability behavior.
Does the AT29C512-15PC require external high-voltage circuitry for programming?
No, the AT29C512-15PC operates with a single 5 V ±10% supply for both read and program operations. Its internal charge pump and voltage-sensing logic eliminate the need for +12 V programming voltages, making it suitable for direct connection to standard 5 V microcontroller buses without additional power rails.
How does software data protection work on the AT29C512-15PC?
Software data protection on the AT29C512-15PC is enabled by writing three specific values (0xAA to address 0x5555, 0x55 to 0x2AAA, then 0xA0 to 0x5555) in sequence. Once enabled, all subsequent sector programming requires this same unlock sequence. The feature remains active across power cycles until explicitly disabled using the 0x80/0x20 disable command sequence.
Can the AT29C512-15PC be used as a direct replacement for a 27C512 EPROM?
Yes, the AT29C512-15PC is pin-compatible and functionally compatible with the 27C512 EPROM in read mode: identical pinout, same CE/OE/WE control, and TTL/CMOS-compatible I/O levels. However, programming requires sector-based writes and software/hardware protection handling - not simple byte-by-byte EPROM-style programming.
What package type is used for the AT29C512-15PC?
The AT29C512-15PC uses a 32-pin Plastic Dual Inline Package (PDIP), 0.600" wide (JEDEC MS-001), with through-hole mounting. This matches the footprint of legacy EPROMs like the 27C512, enabling drop-in replacement on existing PCBs without redesign.
AT29C512-15PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-DIP (0.600", 15.24mm)
- 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT29C512-15PC FAQ
1.How can I place an order for AT29C512-15PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C512-15PC 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 AT29C512-15PC reliable?
The price and inventory of AT29C512-15PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C512-15PC is usually 5 days.
3.What payment methods are accepted for AT29C512-15PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C512-15PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C512-15PC?
AT29C512-15PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C512-15PC 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 AT29C512-15PC?
For technical support, including AT29C512-15PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C512-15PC requirements.
6.How does Aetrix verify that AT29C512-15PC is sourced from the original manufacturer or authorized distributors?
All AT29C512-15PC 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 AT29C512-15PC meets industry standards.
7.What is the process for return or replacement of AT29C512-15PC?
All AT29C512-15PC units undergo pre-shipment inspection (PSI). If there is an issue with AT29C512-15PC, 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 AT29C512-15PC part is unused and in its original packaging.
Return procedure for AT29C512-15PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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