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Microchip Technology AT29C512-70JC
- Part No.:
- AT29C512-70JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT29C512-70JC.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,319
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Product details
Overview
AT29C512-70JC from Atmel is a 512 Kbit (64K × 8) CMOS Flash memory IC designed for in-system reprogrammability in embedded control and firmware storage applications. It features 70 ns read access time, single 5V ± 10% supply operation, 50 mA active current, 100 µA CMOS standby current, and sector-based programming with 512 sectors of 128 bytes each.
For engineers reviewing the AT29C512-70JC datasheet, AT29C512-70JC pinout, AT29C512-70JC application, or AT29C512-70JC equivalent, key selection considerations include its 70 ns commercial-grade timing, PLCC-32 packaging, hardware/software data protection, DATA polling and toggle-bit program status detection, and compatibility with standard EPROM read interfaces.
Technical Context
The AT29C512-70JC implements sector-erase Flash architecture with internal address/data latches for 128-byte page loading and autonomous erase-program sequencing controlled by an on-chip timer. Its dual-line chip enable (CE) and output enable (OE) logic enables bus contention avoidance during mixed read/write operations.
It supports three primary operational modes: standard EPROM-like read (CE/OE low, WE high), byte-load programming (WE or CE pulse with OE high), and software-controlled data protection via 3-byte unlock sequences at addresses 5555h/2AAAh. Hardware protection includes VCC sense (<3.8 V inhibits programming), 5 ms power-on delay, and noise filtering on WE/CE inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8), sufficient for boot code, configuration tables, or firmware patches in microcontroller systems. |
| Read Access Time | 70 ns maximum - enables direct interface with 10–14 MHz microcontrollers without wait states. |
| Supply Voltage | 5V ± 10% - eliminates need for dedicated programming voltage; compatible with legacy 5V logic rails. |
| Active Current | 50 mA typical - supports burst reads in real-time control loops without excessive thermal load. |
| Standby Current | 100 µA CMOS - enables low-power retention in battery-backed or energy-constrained systems. |
| Endurance | >10,000 program/erase cycles per sector - suitable for field-upgradable firmware with infrequent updates. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade industrial control panels and office equipment. |
Pinout & Package
AT29C512-70JC is housed in a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32) package, compliant with JEDEC MS-016 Variation AE, with lead coplanarity ≤0.102 mm and body dimensions 12.57 mm × 15.11 mm × 3.56 mm (L×W×H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus supporting full 64K-word addressing; A0–A6 select byte within 128-byte sector, A7–A15 select sector. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; carries data during read, byte-load, and polling operations; high-impedance when deselected. |
| CE | Chip Enable | Primary device select; must be low for read or program; high forces standby mode and disables outputs. |
| OE | Output Enable | Controls output buffer; low enables data output during read; high places I/O pins in high-Z state to prevent bus contention. |
| WE | Write Enable | Triggers byte-load and program initiation; low pulse (≥90 ns) with CE low and OE high loads data into latches. |
| VCC | Power Supply | +5V ± 10% main supply; powers core logic and I/O buffers; internally regulated for stable programming voltage. |
| GND | Ground Reference | Signal and power return; decoupling capacitor required near VCC pin to suppress switching noise during program cycles. |
| NC | No Connect | Two unconnected pins (PLCC positions 6 and 9); must remain floating - no external connection or pull-up/down. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Program Architecture | 512 independent 128-byte sectors enable granular firmware updates without erasing entire memory - reduces update time and wear leveling overhead. |
| DATA Polling & Toggle Bit | I/O7 complement polling and I/O6 toggling provide asynchronous, bus-compatible program completion detection - eliminates need for fixed delays or external timers. |
| Hardware + Software Data Protection | VCC sensing, 5 ms power-on delay, and 3-byte unlock sequence (5555h/2AAAh/A0h) prevent accidental writes during power transitions or noise events. |
| 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 5V CMOS and legacy TTL microcontrollers. |
| Fast Sector Program Cycle | 10 ms typical - enables rapid field updates; internal latching frees address/data bus after initial byte load, allowing background processing. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
|
Use Scenario: Storing ladder logic programs and I/O mapping tables in programmable logic controllers requiring field updates without hardware replacement. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with 70 ns read access enabling real-time scan cycle execution; sector erase allows partial reprogramming during maintenance windows. Use Value: Eliminates need for EPROM UV erasers or external programmers; 10,000-cycle endurance supports decades of scheduled firmware revisions in factory automation environments. |
Use Scenario: Holding calibration coefficients, user preferences, and safety-critical device settings in portable diagnostic equipment with battery backup. IC Role / Device Role / Timing Role: Low-power (100 µA standby) nonvolatile memory preserving settings across power cycles; hardware write protection prevents corruption during brown-out conditions. Use Value: Ensures regulatory compliance for data integrity; software lock/unlock sequence guarantees that only authenticated service tools can modify calibration data. |
| Telecom Line Card Boot ROM | Automotive Body Control Module Code Storage |
|
Use Scenario: Hosting boot loader and initialization firmware for carrier-grade DSLAM line cards operating in temperature-stabilized cabinets. IC Role / Device Role / Timing Role: Fast 70 ns read access synchronizes with 12 MHz MIPS processors; 5V-only operation simplifies power design versus multi-voltage EPROM alternatives. Use Value: Reduces BOM count by eliminating level shifters; TSOP/PLCC packaging supports automated assembly and thermal cycling reliability up to 85°C ambient. |
Use Scenario: Storing vehicle-specific configuration data (e.g., door lock logic, lighting profiles) in BCMs where firmware may be updated at dealership service centers. IC Role / Device Role / Timing Role: In-system programmable Flash memory interfaced directly to 8051-based controllers; sector erase isolates updates to affected modules only. Use Value: Enables OEM-level personalization without custom mask ROM variants; DATA polling integration simplifies bootloader development for ISO 14229-compliant flash programming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29F040B-70JC | 4 Mbit (512K × 8), 70 ns access, requires 12 V for programming; no software data protection. | Higher density but incompatible 5V-only architecture; lacks DATA polling and toggle bit status reporting. | Select only if legacy system requires pin-compatible 4 Mbit upgrade and 12 V programming infrastructure exists. |
| SST39VF512-70-4C-NHE | 512 Kbit, 70 ns, 3.3 V core (with 5 V I/O tolerance); 100 µA standby; supports byte-write without sector erase. | Lower voltage operation reduces power; lacks hardware VCC-sense protection and uses different unlock sequence (5555h/2AAAh/AAh). | Prefer for new 3.3 V designs with tighter power budgets; not drop-in replaceable due to voltage and command set differences. |
Compared with AM29F040B-70JC and SST39VF512-70-4C-NHE, the AT29C512-70JC uniquely combines 5V-only operation, integrated sector erase control, and dual-status detection (DATA polling + toggle bit) in a commercial-temperature PLCC package - making it optimal for cost-sensitive, field-upgradable 5V embedded systems where programming infrastructure simplicity is critical.
Availability
AT29C512-70JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, telecom line card boot ROM, and automotive body control module code storage requiring stable component supply over extended production lifecycles.
Supply support for AT29C512-70JC 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, Flash memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT29C512-70JC belongs to Atmel's legacy parallel-interface Flash memory product line, engineered specifically for 5V embedded systems needing in-system reprogrammability without high-voltage programming circuitry or external timing components.
FAQ
What is the operating temperature range for the AT29C512-70JC?
The AT29C512-70JC is rated for commercial temperature operation from 0°C to +70°C. This range is explicitly defined in the Ordering Information table and confirmed in the DC and AC Operating Range section of the datasheet. It is not qualified for industrial (–40°C to +85°C) use - for that, the AT29C512-70JI variant must be selected. The -70JC suffix denotes the 70 ns speed grade and PLCC package in commercial temperature grade.
Does the AT29C512-70JC require a high-voltage programming signal?
No, the AT29C512-70JC does not require high-voltage programming. It operates with a single 5V ± 10% supply for both read and program functions. Programming is enabled via standard 5V logic-level commands (e.g., the 3-byte unlock sequence at addresses 5555h/2AAAh/A0h), and internal circuitry generates all necessary voltages. This eliminates the need for external 12 V supplies or charge pumps commonly found in older EPROM or EEPROM devices.
How is program completion detected on the AT29C512-70JC?
Program completion on the AT29C512-70JC is detected using two hardware-supported methods: DATA polling on I/O7 (which returns the complement of the last loaded byte until programming finishes) and the Toggle Bit on I/O6 (which alternates between 0 and 1 during programming and stabilizes upon completion). Both methods allow the host system to poll asynchronously without fixed timing delays or external interrupt signals.
What package type is used for the AT29C512-70JC?
The AT29C512-70JC uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32) package, designated as "32J" in Atmel's ordering nomenclature. This surface-mount package features a square body with J-shaped leads, complies with JEDEC MS-016 Variation AE, and has mechanical dimensions of 12.57 mm × 15.11 mm × 3.56 mm. Pin 1 is marked by a corner notch and diagonal chamfer.
Can the AT29C512-70JC be used as a direct replacement for standard EPROMs like the 27C512?
The AT29C512-70JC is pin-compatible with the 27C512 EPROM in PLCC-32 packaging and shares identical address/data/control pin assignments (A0–A15, I/O0–I/O7, CE, OE, WE/G). However, it is not a functional drop-in replacement because it requires specific software unlock sequences before programming and exhibits different timing behavior during write cycles (e.g., tWC = 10 ms). Read operations are fully compatible, but system firmware must implement Flash-specific programming protocols.
AT29C512-70JC 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:
- 70 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT29C512-70JC FAQ
1.How can I place an order for AT29C512-70JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C512-70JC 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 AT29C512-70JC reliable?
The price and inventory of AT29C512-70JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C512-70JC is usually 5 days.
3.What payment methods are accepted for AT29C512-70JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C512-70JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C512-70JC?
AT29C512-70JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C512-70JC 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 AT29C512-70JC?
For technical support, including AT29C512-70JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C512-70JC requirements.
6.How does Aetrix verify that AT29C512-70JC is sourced from the original manufacturer or authorized distributors?
All AT29C512-70JC 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 AT29C512-70JC meets industry standards.
7.What is the process for return or replacement of AT29C512-70JC?
All AT29C512-70JC units undergo pre-shipment inspection (PSI). If there is an issue with AT29C512-70JC, 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 AT29C512-70JC part is unused and in its original packaging.
Return procedure for AT29C512-70JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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