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Microchip Technology AT29C020-10JC
- Part No.:
- AT29C020-10JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT29C020-10JC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,116
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Product details
Overview
AT29C020-10JC from Atmel is a 2-megabit (256K × 8) 5-volt-only Flash memory IC organized as 262,144 bytes, featuring 70 ns read access time, 10 ms sector program cycle time, hardware/software data protection, and two 8K-byte boot blocks with independent lockout. It serves as nonvolatile storage for firmware and configuration in embedded microcontroller systems requiring in-system reprogrammability without high-voltage programming.
For engineers reviewing the AT29C020-10JC datasheet, AT29C020-10JC pinout, AT29C020-10JC application, or AT29C020-10JC equivalent, this page delivers verified technical context, sector-based programming behavior, boot block lockout logic, DATA polling and TOGGLE bit status detection methods, and real-world design implications of its 5V-only command set and CMOS/TTL-compatible I/O.
Technical Context
The AT29C020-10JC implements sector-based Flash architecture with 1024 × 256-byte sectors, internal address/data latches for full-sector loading, and autonomous erase-then-program execution triggered by WE/CE control. Its dual-line chip enable (CE) and output enable (OE) logic enables bus contention avoidance during mixed read/write operations.
It supports three distinct operational modes: standard read (CE/OE low, WE high), byte load (WE or CE pulse with OE high), and software-controlled programming (three-command unlock sequence followed by sector data load). Boot block lockout is enabled via a seven-command algorithm targeting addresses 00000H and 3FFFFH, disabling chip erase if activated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), enabling firmware storage for mid-complexity 8/16-bit MCUs |
| Read Access Time | 100 ns max (tACC), compatible with 10 MHz bus timing in commercial temperature range |
| Sector Program Time | 10 ms typical (tWC), limiting write throughput to ~100 sectors/sec under continuous operation |
| VCC Supply | 5 V ±10%, eliminating need for dedicated programming voltage rails or charge pumps |
| Endurance | >10,000 program/erase cycles per sector, supporting field firmware updates over product lifetime |
| Standby Current | 100 µA (ISB1, commercial), enabling low-power retention in battery-backed systems |
| Operating Temp | 0°C to +70°C (commercial), validated for industrial control panels and consumer electronics enclosures |
Pinout & Package
AT29C020-10JC is packaged in a 32-lead Plastic J-leaded Chip Carrier (PLCC), JEDEC MS-016 compliant, with 1.27 mm pitch and 12.45 mm × 14.95 mm footprint. Pin 1 identifier is a corner notch; package height is 3.18–3.56 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-byte addressing; A8–A17 define sector address during programming |
| I/O0–I/O7 | Bidirectional Data Bus | CMOS/TTL-compatible 8-bit data path; I/O7 used for DATA polling, I/O6 for TOGGLE bit status monitoring |
| CE | Chip Enable | Active-low global select; when high, places outputs in high-impedance state regardless of OE/WE state |
| OE | Output Enable | Active-low read control; must be high during programming to prevent bus contention |
| WE | Write Enable | Active-low programming control; initiates byte load or sector program on falling edge with CE low |
| NC | No Connect | Pin 1 (PLCC top view) is unconnected; no internal bonding or electrical function |
| VCC | Power Supply | +5 V ±10% supply; powers core logic and I/O buffers; VCC sense circuitry inhibits programming below 3.8 V |
| GND | Ground Reference | Signal and power ground reference for all inputs, outputs, and internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| 5V-only sector programming | Eliminates external high-voltage generators; simplifies PCB layout and reduces BOM count |
| Hardware data protection | VCC sense, 5 ms power-on delay, and noise filtering (<15 ns pulses rejected) prevent spurious writes during power transients |
| Software data protection | Three-command unlock sequence (AAh/55h/A0h) required before each sector program, preventing accidental firmware corruption |
| Boot block lockout | Independent 8K-byte lockout for lower (0x00000–0x01FFF) and upper (0x3E000–0x3FFFF) memory regions, securing bootloader code |
| DATA polling & TOGGLE bit | Real-time program completion detection via I/O7 complement or I/O6 toggling, enabling deterministic host software flow control |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing firmware images and calibration tables in programmable logic controllers deployed in factory automation environments with ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Nonvolatile program memory interfaced directly to an 8051 or ARM7-based controller bus; operates in read mode during runtime and sector-program mode during field updates. Use Value: 100 ns tACC ensures compatibility with 10 MHz system clocks; 10,000-cycle endurance supports quarterly firmware patches over 10+ year product life. |
Use Scenario: Holding device-specific configuration parameters (e.g., sensor gain, alarm thresholds) in portable diagnostic equipment requiring FDA-compliant data integrity. IC Role / Device Role / Timing Role: Secure parameter store with boot block lockout protecting critical startup routines; software data protection prevents unauthorized reprogramming during service. Use Value: Dual lockout enables separation of immutable bootloader (lower 8K) and field-updatable config (remaining 248K); 100 µA standby current extends battery life between calibrations. |
| Automotive Infotainment Bootloader | Networking Equipment BIOS Storage |
Use Scenario: Hosting boot code for head-unit microcontrollers in vehicles where ECU reflash occurs via CAN diagnostics and thermal cycling ranges from −40°C to +85°C. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector; accessed in read mode at power-on; programmed only during authorized dealer reflashes using sector-based protocols. Use Value: Industrial-grade variant (AT29C020-10JI) supports −40°C to +85°C; hardware VCC sensing prevents partial writes during ignition transients. |
Use Scenario: Storing BIOS and FPGA configuration bitstreams in enterprise switches/routers undergoing remote firmware upgrades via TFTP or HTTP. IC Role / Device Role / Timing Role: System-level nonvolatile memory accessible by management CPU; uses DATA polling to synchronize host-side upgrade progress without fixed timeouts. Use Value: 10 ms sector program time enables predictable upgrade duration; 256-byte sector granularity allows patching individual BIOS modules without full erase. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV020B-120EC | 3 V core, 5 V I/O; 120 ns read access; 12 V programming not required but 3 V operation reduces power | Lower active current (30 mA vs. 40 mA); suited for battery-powered designs where 3 V logic dominates | Select if system uses 3 V microcontrollers and requires lower dynamic power; verify 3 V–5 V level translation for legacy 5 V buses |
| MX29LV200CBTI-70G | 3 V supply only; 70 ns read access; CFI-compliant command set; no 5 V-only constraint | Supports common flash interface for standardized driver reuse; lacks boot block lockout feature | Choose for new designs needing CFI compatibility and faster read timing; omit if boot block security is mandatory |
Compared with AM29LV020B-120EC and MX29LV200CBTI-70G, the AT29C020-10JC uniquely provides 5 V-only operation with integrated boot block lockout and hardware VCC-sense protection-critical for legacy 5 V industrial systems where voltage rail stability cannot be guaranteed.
Availability
AT29C020-10JC is available at Aetrix Electronics and suitable for industrial control panels, medical diagnostic instruments, and automotive infotainment systems requiring stable component supply across extended product lifecycles.
Supply support for AT29C020-10JC 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 embedded applications.
The AT29C020 belongs to Atmel's legacy parallel-interface Flash memory product line, designed specifically for 5 V systems needing in-system reprogrammability without high-voltage programming infrastructure.
FAQ
What is the maximum operating temperature range for the AT29C020-10JC?
The AT29C020-10JC is rated for commercial temperature operation from 0°C to +70°C. This is confirmed in the Ordering Information table, where "-10JC" suffix denotes the PLCC package with commercial grade temperature range. Industrial variants (e.g., AT29C020-10JI) support −40°C to +85°C, but the -10JC specifically does not.
Does the AT29C020-10JC require external high-voltage programming signals?
No, the AT29C020-10JC does not require external high-voltage programming signals. It is a 5-volt-only Flash memory: all programming commands-including sector erase and write-are executed using standard 5 V logic levels. The internal VCC sense circuitry actively inhibits programming if VCC drops below 3.8 V, ensuring reliability without auxiliary voltage rails.
How many sectors does the AT29C020-10JC have, and what is the size of each sector?
The AT29C020-10JC contains 1024 sectors, each 256 bytes in size. This is explicitly stated in the Features section and confirmed in the Sector Program Operation description. The total memory capacity of 262,144 bytes (256K × 8) divided by 256 bytes per sector yields exactly 1024 sectors.
Can the boot blocks in the AT29C020-10JC be independently locked?
Yes, the AT29C020-10JC has two 8K-byte boot blocks-one at the lowest addresses (0x00000–0x01FFF) and one at the highest (0x3E000–0x3FFFF)-and the programming lockout feature can be enabled independently for either or both blocks using separate seven-command algorithms. Once locked, that block cannot be erased or programmed, even by chip erase.
What methods does the AT29C020-10JC provide to detect end-of-program completion?
The AT29C020-10JC provides two hardware-supported methods: DATA polling (monitoring complement-to-data on I/O7) and TOGGLE bit detection (observing alternating 0/1 states on I/O6). Both methods are valid during any point in the program cycle and eliminate the need for fixed timeout delays in host firmware.
AT29C020-10JC 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:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- 100 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)
AT29C020-10JC FAQ
1.How can I place an order for AT29C020-10JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C020-10JC 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 AT29C020-10JC reliable?
The price and inventory of AT29C020-10JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C020-10JC is usually 5 days.
3.What payment methods are accepted for AT29C020-10JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C020-10JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C020-10JC?
AT29C020-10JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C020-10JC 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 AT29C020-10JC?
For technical support, including AT29C020-10JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C020-10JC requirements.
6.How does Aetrix verify that AT29C020-10JC is sourced from the original manufacturer or authorized distributors?
All AT29C020-10JC 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 AT29C020-10JC meets industry standards.
7.What is the process for return or replacement of AT29C020-10JC?
All AT29C020-10JC units undergo pre-shipment inspection (PSI). If there is an issue with AT29C020-10JC, 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 AT29C020-10JC part is unused and in its original packaging.
Return procedure for AT29C020-10JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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