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Microchip Technology AT29C1024-12JC
- Part No.:
- AT29C1024-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT29C1024-12JC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,713
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Product details
Overview
AT29C1024-12JC from Atmel is a 5-V-only, 1-Mbit (64K × 16) Flash memory IC designed for in-system reprogrammability in embedded controllers and firmware storage applications. It features 70 ns read access time, sector-based programming with 512 sectors (128 words/sector), 10 ms sector program cycle time, hardware/software data protection, and CMOS/TTL-compatible I/O.
For engineers reviewing the AT29C1024-12JC datasheet, AT29C1024-12JC pinout, AT29C1024-12JC application, or AT29C1024-12JC equivalent, key selection criteria include 5V-only operation, sector erase granularity, DATA polling and toggle-bit end-of-program detection, and PLCC-44 packaging for industrial temperature range (-40°C to +85°C).
Technical Context
The AT29C1024-12JC implements a sector-based Flash architecture where each of 512 sectors holds 128 words (256 bytes); programming requires loading all 128 words before internal auto-erase-and-program execution. Address latching occurs on falling CE or WE edges, with A7–A15 selecting the sector and A0–A6 selecting the word within it.
It supports dual data validation methods-DATA polling on I/O7/I/O15 (complement-to-data during programming) and toggle-bit monitoring on I/O6/I/O14-and integrates VCC sense, noise filtering, and software-controlled write protection using three-step command sequences at fixed addresses (5555H/2AAAH/A0A0H).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (64K × 16), enabling firmware storage for mid-complexity microcontrollers |
| Read Access Time | 120 ns (tACC), compatible with 8 MHz bus timing in legacy embedded systems |
| Sector Size | 128 words (256 bytes), allowing fine-grained firmware updates without full chip erase |
| Program Cycle Time | 10 ms per sector, enabling predictable update latency in field-upgrade scenarios |
| Supply Voltage | 5 V ± 10%, eliminating need for dedicated programming voltage circuitry |
| Standby Current | 200 µA (CMOS), supporting low-power sleep modes in battery-backed systems |
| Endurance | >10,000 write/erase cycles per sector, suitable for infrequent configuration updates |
| Operating Temp | -40°C to +85°C (industrial grade), validated for automotive body control and industrial PLC use |
Pinout & Package
AT29C1024-12JC is packaged in a 44-lead Plastic J-Leaded Chip Carrier (PLCC-44), pin-compatible with JEDEC MS-018 AA standard. The package provides robust thermal performance and reliable socketing for development and production environments.
| 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 intra-sector word |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel interface; I/O6/I/O7/I/O14/I/O15 used for toggle-bit and DATA polling status feedback |
| CE | Chip Enable | Active-low chip select; must be low for read/write; high disables outputs and enables standby mode |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention during reads |
| WE | Write Enable | Active-low write strobe; controls data latching and initiates sector load/program sequence |
| VCC | Power Supply | +5 V ± 10% supply; powers core logic and I/O buffers; includes internal VCC sense for program inhibition below 3.8 V |
| VSS | Ground | Dual ground pins (pins 13 and 30 in PLCC) reduce noise coupling and improve signal integrity |
| NC/DC | No Connect / Don't Connect | Unbonded or reserved pins (e.g., pins 1, 8, 25, 31, 32, 40, 43, 44); must remain unconnected per design |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Reprogramming | Eliminates need for external 12V programming supplies, simplifying power design and reducing BOM cost |
| Internal Program Timer & Control | Automates sector erase and programming sequence after data load, removing host MCU timing-critical overhead |
| 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-command unlock sequence (5555H/2AAAH/A0A0H) prevents accidental firmware corruption in deployed systems |
| DATA Polling & Toggle Bit | Enables real-time program status monitoring without dedicated status registers or extra control lines |
| CMOS/TTL Compatibility | Supports direct interfacing with both legacy TTL and modern CMOS microcontrollers without level-shifting |
Applications
| Industrial PLC Firmware Storage | Automotive Body Control Module |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in factory-floor environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with sector-level reprogrammability; 120 ns read access supports real-time scan-cycle execution. Use Value: Enables field firmware upgrades without chip removal; 10,000-cycle endurance ensures long-term reliability across maintenance intervals. | Use Scenario: Holding configuration data and calibration tables in door module ECUs exposed to under-hood thermal cycling and vibration. IC Role / Device Role / Timing Role: Industrial-grade Flash memory providing secure, sector-protected storage for vehicle-specific settings. Use Value: -40°C to +85°C rating and hardware write protection prevent corruption during cold starts or thermal transients. |
| Legacy Embedded System BIOS | Medical Diagnostic Equipment Bootloader |
Use Scenario: Replacing EPROM in legacy medical imaging subsystems requiring firmware patching via RS-232 or CAN interfaces. IC Role / Device Role / Timing Role: Drop-in EPROM replacement with identical 16-bit bus interface and read timing behavior. Use Value: 70 ns read access meets original EPROM timing specs; 5V-only operation avoids redesign of existing 5V-only PCBs. | Use Scenario: Storing certified bootloader code in Class IIa diagnostic devices where firmware integrity verification and update audit trails are required. IC Role / Device Role / Timing Role: Secure boot memory with software data protection enabled to prevent unauthorized modification of startup routines. Use Value: Three-step unlock sequence ensures only authenticated firmware updates can modify bootloader content. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV160DB-70EC | 3.3 V core with 5 V I/O tolerance; 16 Mbit density; 70 ns access; CFI-compliant command set | Requires level translation for pure 5 V systems; larger capacity suits complex bootloaders but increases cost | Select when migrating to lower-voltage platforms or needing CFI-standardized firmware tools |
| SST39VF1601-70-4C-EKE | 3.3 V operation only; 16 Mbit; 70 ns access; single-power-supply sector erase | Incompatible with 5 V-only designs; lacks hardware VCC-sense protection for brown-out resilience | Choose for new 3.3 V designs prioritizing lower active current (18 mA vs. 60 mA) and higher density |
Compared with AM29LV160DB-70EC and SST39VF1601-70-4C-EKE, the AT29C1024-12JC offers native 5 V-only operation, proven industrial temperature stability, and integrated hardware write protection - making it optimal for maintaining legacy 5 V embedded systems without redesign.
Availability
AT29C1024-12JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive body control modules, and legacy embedded system BIOS applications requiring stable component supply and long-term lifecycle support.
Supply support for AT29C1024-12JC 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 markets.
The AT29C1024-12JC belongs to Atmel's early-generation 5 V Flash memory product line, engineered specifically for seamless EPROM replacement and in-system firmware updates in resource-constrained embedded systems.
FAQ
What is the maximum operating temperature range for the AT29C1024-12JC?
The AT29C1024-12JC is rated for industrial temperature operation from -40°C to +85°C. This specification is confirmed in the Ordering Information table (page 12) and DC Operating Range section (page 4), where "JI" suffix denotes industrial grade. Its thermal performance supports deployment in engine control units, factory automation controllers, and outdoor telecom equipment.
Does the AT29C1024-12JC require a high-voltage programming supply?
No, the AT29C1024-12JC operates with a single 5 V ± 10% supply for both read and program operations. As stated in the Features and Description sections, it uses "5-Volt Only Reprogramming" and incorporates internal voltage generation and VCC sensing - eliminating external 12 V programming supplies required by older EPROMs and some early Flash devices.
How does sector programming work on the AT29C1024-12JC?
Sector programming on the AT29C1024-12JC requires loading all 128 words of a selected sector (via WE or CE pulses) before initiating automatic internal erase-and-program. A7–A15 define the sector address; A0–A6 define intra-sector word location. Once the final word is loaded, the device begins programming after a 150 µs timeout - no separate command is needed.
Can the AT29C1024-12JC be used as a direct replacement for standard EPROMs?
Yes, the AT29C1024-12JC is designed as an EPROM drop-in replacement: it uses identical 16-bit parallel bus timing (read mode), shares pinout compatibility with common 27C1024 EPROMs in PLCC-44, and asserts data on the same bus signals (I/O0–I/O15). Its 120 ns read access matches standard 120 ns EPROM timing, enabling plug-and-play substitution.
What mechanisms protect against unintended writes on the AT29C1024-12JC?
The AT29C1024-12JC implements dual protection: hardware safeguards (VCC sense <3.8 V inhibits programming, 5 ms power-on delay, noise filtering on WE/CE) and software protection (three-command unlock sequence at addresses 5555H/2AAAH/A0A0H). Both are documented in the Hardware and Software Data Protection sections (pages 2–3) and verified in the Operating Modes table (page 4).
AT29C1024-12JC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 1Mbit
- Memory Organization:
- 64K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- 120 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.6x16.6)
AT29C1024-12JC FAQ
1.How can I place an order for AT29C1024-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C1024-12JC 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 AT29C1024-12JC reliable?
The price and inventory of AT29C1024-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C1024-12JC is usually 5 days.
3.What payment methods are accepted for AT29C1024-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C1024-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C1024-12JC?
AT29C1024-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C1024-12JC 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 AT29C1024-12JC?
For technical support, including AT29C1024-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C1024-12JC requirements.
6.How does Aetrix verify that AT29C1024-12JC is sourced from the original manufacturer or authorized distributors?
All AT29C1024-12JC 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 AT29C1024-12JC meets industry standards.
7.What is the process for return or replacement of AT29C1024-12JC?
All AT29C1024-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT29C1024-12JC, 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 AT29C1024-12JC part is unused and in its original packaging.
Return procedure for AT29C1024-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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