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Microchip Technology AT29C512-90TU
- Part No.:
- AT29C512-90TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29C512-90TU.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,813
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Product details
Overview
AT29C512-90TU from Atmel is a 512 Kbit (64K × 8) CMOS Flash memory IC designed for in-system reprogrammability with 5V-only operation, 90 ns read access time, 10 ms sector program cycle, and hardware/software data protection. It serves as nonvolatile storage in embedded controllers, firmware boot loaders, and industrial configuration memory where field-upgradable code persistence is required.
For engineers reviewing the AT29C512-90TU datasheet, AT29C512-90TU pinout, AT29C512-90TU application, or AT29C512-90TU equivalent, this page delivers verified timing specs, sector-based programming behavior, PLCC/TSOP package mapping, real-world use cases, and validated alternative parts - all grounded in Atmel's official 0456i–FLASH–9/08 specification.
Technical Context
The AT29C512-90TU implements sector-erase-and-program architecture with 512 independent 128-byte sectors, internal address/data latches, and autonomous control timer. It supports both hardware- and software-initiated programming, with DATA polling (I/O7) and toggle-bit (I/O6) methods for cycle completion detection.
Its dual-line chip enable (CE) and output enable (OE) control enables bus contention avoidance during mixed read/write operations. Programming requires no external high-voltage supply - only standard 5V ±10% VCC, TTL/CMOS-compatible I/O, and precise WE/CE pulse sequencing per byte load timing (tBLC = 150 µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8), sufficient for firmware images up to 64 KB in size |
| Read Access Time | 90 ns max - defines minimum clock period for synchronous read interfaces |
| Sector Size | 128 bytes - smallest erasable/programmable unit; impacts update granularity and wear leveling |
| Program Cycle Time | 10 ms per sector - determines firmware update latency and system timeout requirements |
| VCC Supply Range | 5V ±10% - compatible with standard 5V logic rails without regulation overhead |
| Standby Current | 300 µA CMOS - enables low-power retention in battery-backed or energy-sensitive systems |
| Endurance | >10,000 write/erase cycles per sector - supports field firmware updates over multi-year product life |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded environments |
Pinout & Package
AT29C512-90TU is available in two RoHS-compliant, green (Pb/halide-free) packages: 32-lead PLCC (32J) and 32-lead TSOP Type I (32T). Both share identical pin functions and electrical behavior.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus; A0–A6 select byte within sector, A7–A15 select sector (512 total) |
| 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 device selection; must be low for read/program; high forces standby mode |
| OE | Output Enable | Active-low output control; used with CE to gate data onto bus and avoid contention |
| WE | Write Enable | Active-low signal initiating byte load; timing-critical for sector programming sequence |
| VCC | Power Supply | +5V ±10% supply; powers core logic and I/O buffers; VCC sense inhibits program if <3.8V |
| GND | Ground Reference | Common return path for all signals and power; critical for noise immunity in high-speed reads |
| NC | No Connect | Unbonded pins (PLCC pins 15, 16, 31; TSOP pins 15, 16, 31); must remain floating |
Key Features
| Feature | Design Value |
|---|---|
| 5V-only reprogramming | Eliminates need for dedicated 12V programming supply - simplifies board design and reduces BOM cost |
| Hardware data protection | VCC sense, 5 ms power-on delay, and noise filtering prevent accidental writes during power transitions or EMI events |
| Software data protection | Three-byte unlock sequence (AAh/55h/A0h) required before each sector program - prevents unintended firmware corruption |
| DATA polling (I/O7) | Enables polling-based firmware update without external timers or interrupts - reduces host CPU overhead |
| Toggle bit (I/O6) | Provides alternate asynchronous method to detect program completion - useful when I/O7 is masked or shared |
| Green packaging | Pb/halide-free PLCC and TSOP options meet RoHS Directive 2011/65/EU and JEDEC J-STD-609A standards |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing programmable logic controller firmware that requires field updates via serial port or USB bootloader. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector-level reprogrammability; 90 ns read speed supports real-time scan cycle execution. Use Value: Enables safe, in-system firmware upgrades without removing the module - reducing maintenance downtime and service costs. |
Use Scenario: Holding calibration tables, patient parameter defaults, and safety-critical configuration data in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store; software data protection prevents unauthorized parameter changes. Use Value: Ensures regulatory compliance (IEC 62304) by guaranteeing data integrity across power cycles and preventing accidental overwrites. |
| Automotive Body Control Module Bootloader | Network Router Boot Image Storage |
Use Scenario: Storing bootloader code in automotive body control units (BCUs) that support OTA firmware patches. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector; 10,000-cycle endurance accommodates lifetime vehicle software updates. Use Value: Supports secure, authenticated firmware updates while meeting AEC-Q100 Grade 2 temperature requirements (−40°C to +85°C). |
Use Scenario: Hosting compressed boot image for embedded Linux routers requiring fast cold-start initialization. IC Role / Device Role / Timing Role: High-speed read-access memory; 90 ns tACC allows direct execution from flash or rapid copy-to-RAM. Use Value: Reduces boot time by >15% compared to slower EEPROM alternatives - improving customer perceived responsiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT29LV512-90TU | 3V-only operation (2.7–3.6V), 90 ns access, same density and sector structure | Designed for low-voltage embedded systems; incompatible with 5V buses without level shifting | Select when migrating to 3.3V system architecture and power optimization is critical |
| MX29LV512CTTI-90G | 3V supply, 90 ns access, same 64K×8 organization, but uses different unlock sequence (5555h/2AAAh) | Requires modified software driver for programming; not drop-in compatible due to command set divergence | Choose for second-source supply continuity where Atmel sourcing is constrained |
Compared with AT29C512-90TU, AT29LV512-90TU reduces active current and enables lower-system voltage operation but sacrifices 5V compatibility; MX29LV512CTTI-90G offers functional equivalence in density and timing but demands firmware adaptation for command protocol differences.
Availability
AT29C512-90TU is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and automotive body electronics requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT29C512-90TU 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 U.S.-based semiconductor company specializing in microcontrollers, Flash memory, and secure authentication ICs.
The AT29C512-90TU belongs to Atmel's legacy parallel-interface Flash memory product line, engineered for reliable, in-system reprogrammable storage in industrial and embedded applications where 5V compatibility and sector-level granularity are essential.
FAQ
What is the maximum operating temperature range for the AT29C512-90TU?
The AT29C512-90TU is rated for industrial temperature operation from −40°C to +85°C. This range is confirmed in Section 6 of the official datasheet (0456i–FLASH–9/08) and applies to both PLCC and TSOP package variants. Operation outside this range may result in data retention loss or timing violations.
Does the AT29C512-90TU require high-voltage programming signals?
No, the AT29C512-90TU uses 5-volt-only reprogramming - no external 12V or 12.5V supply is needed. Programming is initiated using standard 5V logic levels on CE, WE, and OE, with specific three-byte unlock sequences. This eliminates high-voltage circuitry and simplifies system design.
How many times can a sector of the AT29C512-90TU be rewritten?
Each sector of the AT29C512-90TU is rated for typical endurance of >10,000 write/erase cycles. This value is specified in the Features section and validated across the industrial temperature range. Wear leveling must be implemented in firmware to distribute writes across sectors and achieve full device lifetime.
What package types are offered for the AT29C512-90TU?
The AT29C512-90TU is manufactured in two surface-mount packages: 32-lead PLCC (32J) and 32-lead TSOP Type I (32T), both Pb/halide-free. Pinouts and timing specifications are identical between packages; mechanical dimensions differ per JEDEC MS-016 (PLCC) and MO-142 (TSOP) standards.
Can the AT29C512-90TU be used as a direct replacement for EPROMs like the 27C512?
The AT29C512-90TU is functionally compatible with 27C512 in read mode (same pinout, VCC, GND, A0–A15, I/O0–I/O7, CE, OE, WE), but differs in programming methodology and data protection. It is not a pin-for-pin drop-in replacement for write operations without firmware adaptation to its sector-based programming and unlock sequences.
AT29C512-90TU 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
AT29C512-90TU FAQ
1.How can I place an order for AT29C512-90TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C512-90TU 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 AT29C512-90TU reliable?
The price and inventory of AT29C512-90TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C512-90TU is usually 5 days.
3.What payment methods are accepted for AT29C512-90TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C512-90TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C512-90TU?
AT29C512-90TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C512-90TU 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 AT29C512-90TU?
For technical support, including AT29C512-90TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C512-90TU requirements.
6.How does Aetrix verify that AT29C512-90TU is sourced from the original manufacturer or authorized distributors?
All AT29C512-90TU 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 AT29C512-90TU meets industry standards.
7.What is the process for return or replacement of AT29C512-90TU?
All AT29C512-90TU units undergo pre-shipment inspection (PSI). If there is an issue with AT29C512-90TU, 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 AT29C512-90TU part is unused and in its original packaging.
Return procedure for AT29C512-90TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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