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Microchip Technology AT29C512-15JI
- Part No.:
- AT29C512-15JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT29C512-15JI.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT29C512-15JI from Atmel is a 512 Kbit (64K × 8) in-system programmable Flash memory IC designed for nonvolatile code and data storage in embedded systems. It features 70 ns read access time, 5 V ±10% single-supply operation, 10 ms sector program cycle time, and supports industrial temperature range (–40°C to +85°C). It is used in firmware storage for microcontroller-based industrial controllers where field reprogrammability and data retention are critical.
For engineers reviewing the AT29C512-15JI datasheet, AT29C512-15JI pinout, AT29C512-15JI application, or AT29C512-15JI equivalent, key selection considerations include its 150 ns maximum access time, sector-based 128-byte programming architecture, hardware/software data protection, CMOS standby current of 300 µA, and PLCC-32 packaging with verified pin mapping for industrial-grade reliability.
Technical Context
The AT29C512-15JI implements a sector-erase Flash architecture with 512 independent 128-byte sectors, enabling selective reprogramming without full-chip erase. Its internal address and data latches support burst loading of each 128-byte sector, decoupling bus activity during internal erase-and-program cycles.
It uses dual-line chip enable (CE) and output enable (OE) control for bus contention management, and integrates both hardware-level VCC sensing (inhibit below 3.8 V) and software-controlled data protection via three-byte command sequences (AAh/55h/A0h) to prevent inadvertent writes during power transitions or noise events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8), sufficient for boot code and configuration data in mid-complexity MCUs |
| Read Access Time | 150 ns max - defines worst-case instruction fetch latency in 8-bit microcontroller systems |
| Sector Program Time | 10 ms per 128-byte sector - enables predictable firmware update windows without system freeze |
| Supply Voltage | 5 V ±10% - compatible with legacy 5 V logic rails and eliminates need for auxiliary voltage regulators |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation, motor drives, and outdoor instrumentation |
| Endurance | >10,000 write/erase cycles per sector - supports field firmware updates over multi-year product lifetime |
| Standby Current | 300 µA (industrial) - enables low-power sleep modes in battery-backed or energy-constrained systems |
Pinout & Package
AT29C512-15JI is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32), compliant with JEDEC MS-016 Variation AE. The package features gull-wing leads, 1.27 mm pitch, and a 12.3–12.6 mm × 14.9–15.1 mm body size with 3.2–3.6 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus supporting full 64K-word addressing; A7–A15 define sector, A0–A6 define byte within sector |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; supports DATA polling on I/O7 and toggle-bit detection on I/O6 during programming |
| CE | Chip Enable | Active-low global select; when high, forces outputs to high-impedance and inhibits all operations including programming |
| OE | Output Enable | Active-low read control; used with CE for bus arbitration; must be high during programming |
| WE | Write Enable | Active-low programming control; initiates byte load and sector program cycles; requires precise 90 ns pulse width |
| VCC | Power Supply | +5 V ±10% supply; powers core logic and array; VCC sense circuit disables programming if below 3.8 V |
| GND | Ground Reference | Signal and power return; decoupling capacitor required near VCC pin for stable read/write timing |
| NC | No Connect | Two pins (PLCC pins 6 and 9) are unconnected; must remain floating - no external tie required |
Key Features
| Feature | Design Value |
|---|---|
| Single 5 V Reprogramming | Eliminates need for 12 V programming voltage, simplifying power design and enabling in-circuit updates via standard MCU GPIOs |
| Hardware Data Protection | VCC sense, 5 ms power-on delay, and noise filtering (<15 ns pulses rejected) prevent spurious writes during brown-out or EMI events |
| Software Data Protection | Three-byte unlock sequence (AAh/55h/A0h) required before any sector program - prevents accidental firmware corruption by host software bugs |
| DATA Polling & Toggle Bit | I/O7 complement detection and I/O6 toggling provide real-time, bus-compatible program completion signaling without requiring external timers or interrupts |
| CMOS/TTL Compatibility | Input thresholds (VIL = 0.8 V, VIH = 2.0 V) and output drive (VOH = 2.4 V @ –400 µA) ensure interoperability with both legacy TTL and modern CMOS logic families |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing ladder logic programs and I/O mapping tables in programmable logic controllers deployed in factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector-level reprogrammability; provides deterministic 150 ns read latency for real-time scan-cycle execution. Use Value: Enables field firmware upgrades without removing the controller from operation, while hardware write protection ensures immunity to electrical transients common in industrial settings. | Use Scenario: Retaining calibration coefficients, device serial numbers, and safety-critical configuration parameters in portable diagnostic equipment operating across hospital and ambulance environments. IC Role / Device Role / Timing Role: Secure, long-life data retention element; leverages software data protection to prevent unauthorized parameter modification during service or transport. Use Value: Guarantees >10,000 rewrites per sector and 20+ year data retention at 85°C - meeting IEC 62304 Class C software lifecycle requirements. |
| Automotive Body Control Module (BCM) | Telecom Remote Terminal Boot Memory |
Use Scenario: Holding lighting control algorithms and door-lock actuation logic in under-hood BCMs exposed to thermal cycling and vibration. IC Role / Device Role / Timing Role: Industrial-temperature Flash memory interfaced directly to an 8-bit MCU; operates reliably at –40°C to +85°C with 300 µA standby current. Use Value: Eliminates need for external voltage translators or backup batteries, reducing BOM cost and board space while maintaining AEC-Q100 alignment via robust hardware protection. | Use Scenario: Storing bootloader and initialization firmware in DSLAM line cards located in unconditioned street cabinets with limited cooling. IC Role / Device Role / Timing Role: Primary boot memory accessed at power-up; supports fast 150 ns reads to minimize system boot time and sector-based updates for remote firmware patches. Use Value: Reduces mean time to repair (MTTR) by enabling over-the-air firmware recovery without physical site visits, backed by 10,000-cycle endurance for frequent patch deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV512CTTI-12G | 3 V core supply (3.0–3.6 V), 120 ns access, 1 Mbit density, bottom-boot sector architecture | Requires level-shifting for 5 V systems; higher density suits larger boot images but increases cost and footprint | Select only if migrating to 3 V system architecture and needing extended boot flexibility |
| SST39VF512-70-4C-NHE | 5 V supply, 70 ns access, 512 Kbit, 3.3 V I/O tolerance, no hardware VCC sense | Lacks VCC brown-out protection; relies solely on software lock - less robust in noisy industrial power domains | Prefer for cost-sensitive consumer designs where full industrial-grade protection is not mandated |
Compared with MX29LV512CTTI-12G and SST39VF512-70-4C-NHE, the AT29C512-15JI offers superior industrial reliability through integrated VCC sensing, 5 V-only simplicity, and proven 10,000-cycle endurance - making it optimal for legacy 5 V embedded systems requiring field-upgradable firmware with zero risk of accidental erase.
Availability
AT29C512-15JI is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, automotive body control modules, and telecom remote terminals requiring stable component supply across extended product lifecycles.
Supply support for AT29C512-15JI 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 devices for industrial, automotive, and IoT applications.
The AT29C512-15JI belongs to Atmel's legacy parallel-interface Flash memory product line, engineered specifically for in-system reprogrammability in 5 V embedded systems where robustness, simplicity, and long-term availability are prioritized over ultra-high speed or low-voltage operation.
FAQ
What is the maximum read access time specified for the AT29C512-15JI?
The AT29C512-15JI has a maximum read access time of 150 ns, as confirmed by its ordering code suffix "-15" and AC Read Characteristics table. This value applies across the full industrial temperature range (–40°C to +85°C) and 5 V ±10% supply, ensuring predictable timing for 8-bit microcontroller interfaces without requiring wait states in most designs.
Does the AT29C512-15JI require high-voltage programming signals?
No, the AT29C512-15JI does not require high-voltage programming signals. It supports 5-volt-only reprogramming using standard logic-level WE and CE pulses. Programming is initiated via sector-based byte loads followed by internal erase-and-program cycles controlled by an on-chip timer - eliminating the need for external 12 V supplies or complex voltage translators in the AT29C512-15JI system design.
How is data protection implemented in the AT29C512-15JI?
The AT29C512-15JI implements dual-layer data protection: hardware protection via VCC sensing (disables programming below ~3.8 V), power-on delay (~5 ms), and noise filtering (<15 ns pulses ignored); and software protection via a mandatory three-byte unlock sequence (AAh/55h/A0h) before any sector program. Both mechanisms are active simultaneously in the AT29C512-15JI to prevent accidental writes during power transitions or software faults.
What package type is used for the AT29C512-15JI?
The AT29C512-15JI uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32) package, identified by the "J" suffix in the ordering code. Its dimensions comply with JEDEC MS-016 Variation AE, featuring a 12.4 mm × 15.0 mm body, 1.27 mm lead pitch, and gull-wing leads suitable for through-hole or surface-mount assembly with standard reflow profiles.
Can the AT29C512-15JI be used in commercial-temperature applications?
Yes, the AT29C512-15JI is fully functional across the commercial temperature range (0°C to +70°C), as its industrial qualification (–40°C to +85°C) encompasses the commercial range. However, the "I" suffix explicitly denotes industrial temperature screening - meaning the AT29C512-15JI undergoes extended testing at temperature extremes, offering higher reliability margin and guaranteed parametric performance across the full industrial range.
AT29C512-15JI 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT29C512-15JI FAQ
1.How can I place an order for AT29C512-15JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C512-15JI 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 AT29C512-15JI reliable?
The price and inventory of AT29C512-15JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C512-15JI is usually 5 days.
3.What payment methods are accepted for AT29C512-15JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C512-15JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C512-15JI?
AT29C512-15JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C512-15JI 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 AT29C512-15JI?
For technical support, including AT29C512-15JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C512-15JI requirements.
6.How does Aetrix verify that AT29C512-15JI is sourced from the original manufacturer or authorized distributors?
All AT29C512-15JI 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 AT29C512-15JI meets industry standards.
7.What is the process for return or replacement of AT29C512-15JI?
All AT29C512-15JI units undergo pre-shipment inspection (PSI). If there is an issue with AT29C512-15JI, 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 AT29C512-15JI part is unused and in its original packaging.
Return procedure for AT29C512-15JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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