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Microchip Technology AT29C512-90PI
- Part No.:
- AT29C512-90PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT29C512-90PI.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,281
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Product details
Overview
AT29C512-90PI from Atmel is a 512 Kbit (64K × 8) in-system programmable Flash memory IC operating on single 5V ±10% supply, featuring 90 ns read access time, sector-based reprogramming (512 sectors × 128 bytes), and hardware/software data protection - used in industrial firmware storage, embedded boot code retention, and field-upgradable control systems.
For engineers reviewing the AT29C512-90PI datasheet, AT29C512-90PI pinout, AT29C512-90PI application, or AT29C512-90PI equivalent, key selection considerations include industrial temperature range (-40°C to +85°C), PLCC-32 package compatibility, sector erase granularity, DATA polling/Toggle Bit program status detection, and 5V-only programming without high-voltage support.
Technical Context
The AT29C512-90PI implements a sector-program architecture with internal address/data latches for 128-byte pages, automatic erase-and-program sequencing controlled by an on-chip timer, and dual-line chip enable (CE) and output enable (OE) logic to prevent bus contention during read operations.
It supports three distinct operational modes: standard read (CE/OE low, WE high), byte load (WE or CE pulse with OE high), and software-controlled programming/erase using command sequences at addresses 5555h/2AAAh - enabling in-system reprogrammability without external high-voltage generators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64,536 × 8), sufficient for boot code, configuration tables, and firmware images in resource-constrained microcontrollers |
| Read Access Time | 90 ns max - defines minimum clock cycle for synchronous read interfaces and timing margin for 11 MHz system buses |
| Supply Voltage | 5V ±10% - eliminates need for dedicated programming voltage rails; compatible with legacy 5V logic families |
| Sector Size | 128 bytes per sector - enables fine-grained updates without erasing full device; reduces risk of corruption during partial writes |
| Endurance | >10,000 program/erase cycles per sector - supports frequent field firmware patches in industrial controllers |
| Standby Current | 300 µA max (industrial temp) - enables low-power retention in battery-backed or energy-harvested systems |
| Operating Temperature | -40°C to +85°C - certified for use in motor drives, PLC modules, and outdoor telemetry equipment |
Pinout & Package
AT29C512-90PI is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC-32), compliant with JEDEC MS-016 Variation AE, with pin 1 identifier at corner marked by beveled edge. Package dimensions: 12.57 mm × 15.11 mm × 3.56 mm (L × W × H), lead coplanarity ≤0.102 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus; A0–A6 select byte within 128-byte sector, A7–A15 select sector address |
| I/O0–I/O7 | Bidirectional Data Bus | CMOS/TTL-compatible 8-bit data path; carries program data during byte load, returns stored data during read |
| CE | Chip Enable | Active-low global enable; must be low for read, program, or identification mode; inhibits all operations when high |
| OE | Output Enable | Active-low output gate; controls data bus tristate; held high during programming to avoid contention |
| WE | Write Enable | Active-low write strobe; initiates byte load or triggers internal program cycle when CE is also low |
| VCC | Power Supply | +5V ±10% main supply; powers core logic and I/O buffers; VCC sense circuit disables programming if <3.8V |
| GND | Ground Reference | Signal and power return; decoupling capacitor required near VCC pin for stable operation |
| NC | No Connect | Unbonded pins (PLCC pins 6, 9, 10, 24); must remain unconnected; no internal connection or function |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Programming | Eliminates need for +12V programming supplies or charge pumps - simplifies PCB layout and power design |
| Hardware Data Protection | VCC sense, 5 ms power-on delay, and noise filtering (<15 ns pulses rejected) prevent accidental writes during brown-out or EMI events |
| Software Data Protection | Three-byte unlock sequence (5555h/2AAAh/A0h) required before each program cycle - prevents unintended firmware overwrites |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide real-time, non-intrusive program completion detection without halting host processor |
| Fast Sector Program Cycle | 10 ms typical - enables rapid field updates; internal latching frees address/data bus after initial byte load |
Applications
| Industrial PLC Firmware Storage | Embedded Bootloader Code Retention |
|---|---|
Use Scenario: Storing firmware update images and runtime configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot code and application binaries; accessed via parallel bus during cold start and field upgrade. Use Value: Sector-level erase allows selective patching of control algorithms without full reflash; industrial temperature rating ensures reliability in cabinet-mounted enclosures. |
Use Scenario: Holding primary bootloader code that initializes CPU, configures peripherals, and validates application image integrity before execution. IC Role / Device Role / Timing Role: Read-only memory mapped at reset vector address; provides deterministic 90 ns access for first instruction fetch. Use Value: 5V-only interface matches legacy microcontroller bus voltages; hardware write protection prevents corruption during power transitions. |
| Medical Device Calibration Data | Telecom Line Card Configuration |
Use Scenario: Storing sensor calibration coefficients and safety-critical operational limits in portable diagnostic equipment requiring long-term data retention. IC Role / Device Role / Timing Role: Parameter storage memory accessed during device power-up and periodic self-test routines. Use Value: >10,000 endurance cycles support lifetime recalibration; software lock prevents unauthorized parameter modification. |
Use Scenario: Maintaining port-specific configuration profiles (e.g., line impedance, gain settings) in modular telecom infrastructure cards. IC Role / Device Role / Timing Role: Configuration memory mapped into FPGA or DSP address space; updated via JTAG or serial management interface. Use Value: PLCC-32 package enables socketed replacement for field service; DATA polling allows concurrent host processing during reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV512-90EC | 3V core with 5V I/O tolerance; 90 ns read; 100 µA standby (commercial only) | Requires level-shifting for pure 5V systems; lacks industrial temp grade | Prefer for mixed-voltage designs where 3V logic coexists with 5V peripherals |
| SST39VF512-90-4C-NHE | 5V-only; 90 ns read; 128-byte sector; 10 µA standby; supports byte-write without sector erase | Lower standby current but no hardware VCC-sense protection; different command set | Choose when ultra-low power sleep mode is critical and software protection suffices |
Compared with AM29LV512-90EC and SST39VF512-90-4C-NHE, the AT29C512-90PI offers native 5V operation with robust industrial-grade hardware safeguards, making it optimal for legacy 5V control systems where voltage translation and qualification overhead must be avoided.
Availability
AT29C512-90PI is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, telecom line cards, and embedded boot systems requiring stable component supply across extended lifecycle commitments.
Supply support for AT29C512-90PI 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, with a legacy of robust industrial-grade Flash products.
The AT29C512 product line was designed for in-system programmable firmware storage in 5V embedded systems - prioritizing ease of field upgrade, data integrity under voltage fluctuation, and long-term reliability in harsh environments.
FAQ
What is the maximum operating temperature range for the AT29C512-90PI?
The AT29C512-90PI is rated for industrial temperature operation from -40°C to +85°C. This specification is confirmed in the Ordering Information table and DC Operating Range section of the datasheet. The "I" suffix in the part number explicitly denotes industrial grade. This makes the AT29C512-90PI suitable for deployment in motor control cabinets, outdoor base stations, and other thermally demanding environments where commercial-grade parts would fail.
Does the AT29C512-90PI require high-voltage programming signals?
No, the AT29C512-90PI does not require high-voltage programming signals. It is a 5-volt-only Flash memory, meaning all programming and erase operations are performed using standard 5V logic levels. The device uses internal charge pumps and command sequences (e.g., 5555h/2AAAh) instead of external +12V inputs. This eliminates the need for dedicated high-voltage generators and simplifies system-level design - a defining feature of the AT29C512-90PI.
How many program/erase cycles can the AT29C512-90PI endure per sector?
The AT29C512-90PI guarantees typical endurance of more than 10,000 program/erase cycles per sector. This value is specified in the Features section and reinforced in the Description text. It reflects wear leveling at the sector level, not the entire array. Each of the 512 sectors (128 bytes each) maintains this endurance independently, enabling reliable field firmware updates throughout the product lifecycle without premature memory degradation.
What package type is used for the AT29C512-90PI?
The AT29C512-90PI uses a 32-lead Plastic Leaded Chip Carrier (PLCC-32) package, identified by the "P" in the ordering code suffix. Its mechanical drawing (32J) conforms to JEDEC MS-016 Variation AE. Pin 1 is located at the beveled corner. This surface-mount package supports socketed field replacement and offers better thermal performance than PDIP in dense layouts - a key attribute of the AT29C512-90PI's industrial targeting.
How is program completion detected on the AT29C512-90PI?
Program completion on the AT29C512-90PI is detected using two hardware methods: DATA polling (monitoring I/O7 for complement-to-data transition) and Toggle Bit (observing I/O6 toggling state). Both methods operate concurrently during programming and require no additional timing delays or external components. These features allow host processors to poll asynchronously - a critical capability for real-time systems using the AT29C512-90PI.
AT29C512-90PI 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:
- 90 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
AT29C512-90PI FAQ
1.How can I place an order for AT29C512-90PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C512-90PI 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 AT29C512-90PI reliable?
The price and inventory of AT29C512-90PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C512-90PI is usually 5 days.
3.What payment methods are accepted for AT29C512-90PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C512-90PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C512-90PI?
AT29C512-90PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C512-90PI 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 AT29C512-90PI?
For technical support, including AT29C512-90PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C512-90PI requirements.
6.How does Aetrix verify that AT29C512-90PI is sourced from the original manufacturer or authorized distributors?
All AT29C512-90PI 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 AT29C512-90PI meets industry standards.
7.What is the process for return or replacement of AT29C512-90PI?
All AT29C512-90PI units undergo pre-shipment inspection (PSI). If there is an issue with AT29C512-90PI, 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 AT29C512-90PI part is unused and in its original packaging.
Return procedure for AT29C512-90PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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