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Microchip Technology AT29C512-90TI
- Part No.:
- AT29C512-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29C512-90TI.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,738
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Product details
Overview
AT29C512-90TI from Atmel is a 512 Kbit (64K × 8) 5-volt-only Flash memory IC designed for in-system reprogrammability in embedded controllers and firmware storage applications. It delivers 90 ns read access time, supports sector-based programming (128-byte sectors), features hardware and software data protection, and operates across industrial temperature range (–40°C to +85°C).
For engineers reviewing the AT29C512-90TI datasheet, AT29C512-90TI pinout, AT29C512-90TI application, or AT29C512-90TI equivalent, key selection considerations include its 5V-only supply compatibility, 10 ms sector program cycle, DATA polling/Toggle Bit end-of-write detection, CMOS/TTL I/O compatibility, and industrial-grade reliability with >10,000 write/erase endurance.
Technical Context
The AT29C512-90TI implements a sector-erase architecture with 512 independent 128-byte sectors, enabling selective reprogramming without full-chip erasure. Its internal address and data latches allow 128-byte page loading prior to autonomous erase-and-program execution controlled by an on-chip timer.
It supports dual write-enable methods (WE- or CE-controlled byte loads), hardware VCC-sense and noise filtering for inadvertent-write prevention, and two software-controlled mechanisms-Data Protection Enable/Disable and Product Identification-for system-level configuration and verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8), sufficient for boot code or parameter storage in microcontroller systems |
| Read Access Time | 90 ns max - enables direct interface with 10 MHz bus systems without wait states |
| Sector Size | 128 bytes - balances granularity of updates against overhead of sector management logic |
| Program Cycle Time | 10 ms per sector - defines minimum latency for firmware patching or field calibration writes |
| Endurance | >10,000 write/erase cycles per sector - supports long-term field-updatable applications |
| Supply Voltage | 5 V ± 10% - compatible with legacy 5V logic rails without level-shifting |
| Operating Temperature | –40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor equipment |
Pinout & Package
AT29C512-90TI is packaged in a 32-lead Thin Small Outline Package (TSOP, Type I, 8 × 20 mm), compliant with JEDEC MO-142 BD. Pin 1 is marked with a beveled corner or notch; package is lead-free and RoHS-compliant per Atmel documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus; A7–A15 select sector, A0–A6 select byte within sector during programming |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; carries data during read, byte load, and polling operations |
| CE | Chip Enable | Active-low chip select; must be low for read or write; high disables outputs and enters standby |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention during reads |
| WE | Write Enable | Active-low write strobe; controls byte loading and initiates sector programming when CE is low |
| VCC | Power Supply | +5 V ± 10% supply; powers core logic and I/O buffers |
| GND | Ground | Reference return path for all signals and power |
| NC | No Connect | Unbonded pins (positions 6, 9, 10, 11 in TSOP top view); must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| 5V-only sector programming | Eliminates need for external high-voltage generators, simplifying PCB design and reducing BOM cost |
| Hardware data protection | VCC sense, 5 ms power-on delay, and noise filtering prevent spurious writes during brown-out or EMI events |
| Software data protection | Three-byte unlock sequence required before programming - prevents accidental firmware corruption via software bugs |
| DATA polling & Toggle Bit | Dual asynchronous end-of-write detection methods enable deterministic timing without fixed delays or timers |
| CMOS/TTL I/O compatibility | Supports direct connection to both legacy TTL and modern CMOS microcontrollers without interface logic |
Applications
| Industrial PLC Firmware Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory providing boot code and runtime parameter tables accessible via parallel bus. Use Value: Industrial temperature rating and 10,000-cycle endurance ensure reliable operation over 10+ years in unattended machinery. |
Use Scenario: Retaining calibrated sensor offsets and device-specific correction coefficients in portable diagnostic instruments. IC Role / Device Role / Timing Role: Field-updatable parameter memory supporting recalibration without hardware replacement. Use Value: Sector-level programming allows updating only affected calibration sectors, minimizing write time and wear on unrelated memory regions. |
| Automotive Body Control Module | Legacy Embedded System BIOS |
Use Scenario: Holding configuration data for lighting, window, and door modules subject to dealership-level personalization. IC Role / Device Role / Timing Role: In-system reprogrammable storage accessed via microcontroller's external memory interface. Use Value: Hardware write inhibit and VCC sensing prevent corruption during vehicle battery transients or ignition cycling. |
Use Scenario: Replacing EPROM in legacy industrial computers requiring field-upgradable BIOS or boot loader code. IC Role / Device Role / Timing Role: Drop-in 5V-compatible Flash memory with identical pinout and timing to standard EPROMs. Use Value: 90 ns access time matches common 27C512 EPROMs, enabling direct substitution without timing redesign. |
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 | 3.3 V core with 5 V tolerant I/O; 90 ns read; 100 µA standby current; requires VPP = 12 V for sector erase | Designed for mixed-voltage systems; not 5V-only; higher voltage requirement increases system complexity | Choose only if migrating to lower-power 3.3 V designs and accepting added voltage rail complexity |
| MX29LV512CTTI-90G | 3.0 V supply; 90 ns read; 30 µA standby; supports CFI query mode; no hardware VCC-sense protection | Optimized for portable/battery-powered devices; lacks industrial-grade hardware write safeguards | Select for cost-sensitive consumer applications where power efficiency outweighs robustness requirements |
Compared with AM29LV512-90EC and MX29LV512CTTI-90G, the AT29C512-90TI uniquely combines true 5V-only operation, integrated hardware write protection, and industrial temperature qualification - making it the preferred choice for legacy 5V systems requiring field reliability without voltage translation.
Availability
AT29C512-90TI is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, automotive body electronics, and legacy embedded firmware storage requiring stable component supply and long lifecycle support.
Supply support for AT29C512-90TI 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.
The AT29C512-90TI belongs to Atmel's legacy parallel Flash memory product line, engineered for drop-in replacement of EPROMs in 5V embedded systems requiring in-system reprogrammability and industrial reliability.
FAQ
What is the operating temperature range of the AT29C512-90TI?
The AT29C512-90TI is rated for industrial operation from –40°C to +85°C. This specification is confirmed in the "DC and AC Operating Range" table of the official datasheet (Rev. 0456F), where the "-TI" suffix explicitly denotes the industrial temperature grade. The device maintains full functionality-including 90 ns read access and 10 ms sector programming-across this entire range.
Does the AT29C512-90TI require high voltage for programming?
No, the AT29C512-90TI does not require high voltage for programming. As stated in the datasheet description, it is a "5-volt only in-system Flash programmable" device. All programming commands-including sector erase and byte load-are executed using standard 5 V logic levels on CE, WE, OE, and address/data lines. No external VPP supply or voltage pump circuitry is needed.
How many sectors does the AT29C512-90TI have, and what is the sector size?
The AT29C512-90TI contains 512 sectors, each 128 bytes in size. This is explicitly documented in the "Features" section and verified in the "Device Operation" section, which states: "512 Sectors (128 Bytes/Sector)" and confirms that A7–A15 select the sector address during programming. Total capacity is thus 512 × 128 = 65,536 bytes (512 Kbit).
What methods does the AT29C512-90TI provide to detect the end of a program cycle?
The AT29C512-90TI provides two hardware-supported methods: DATA polling (monitoring complement state on I/O7) and Toggle Bit detection (observing toggling on I/O6). Both are detailed in dedicated sections of the datasheet and function asynchronously-no fixed timing delays are required. These mechanisms allow host firmware to poll efficiently without blocking CPU execution.
Is the AT29C512-90TI pin-compatible with standard EPROMs like the 27C512?
Yes, the AT29C512-90TI uses the same 32-pin parallel interface and pinout as the 27C512 EPROM, including identical A0–A15, I/O0–I/O7, CE, OE, and WE assignments. The datasheet confirms EPROM-like read operation and provides direct comparison in timing diagrams. However, note that NC pins differ slightly-always verify against the TSOP top-view diagram for layout compatibility.
AT29C512-90TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- 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:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT29C512-90TI FAQ
1.How can I place an order for AT29C512-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C512-90TI 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 AT29C512-90TI reliable?
The price and inventory of AT29C512-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C512-90TI is usually 5 days.
3.What payment methods are accepted for AT29C512-90TI?
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Note: Certain payment methods may incur a processing fee.
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AT29C512-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C512-90TI 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 AT29C512-90TI?
For technical support, including AT29C512-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C512-90TI requirements.
6.How does Aetrix verify that AT29C512-90TI is sourced from the original manufacturer or authorized distributors?
All AT29C512-90TI 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 AT29C512-90TI meets industry standards.
7.What is the process for return or replacement of AT29C512-90TI?
All AT29C512-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT29C512-90TI, 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 AT29C512-90TI part is unused and in its original packaging.
Return procedure for AT29C512-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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