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Microchip Technology AT29C020-12TI
- Part No.:
- AT29C020-12TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29C020-12TI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,901
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Product details
Overview
AT29C020-12TI 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, 10,000 write/erase endurance, and industrial temperature range (–40°C to +85°C). It supports in-system reprogramming via sector-based architecture with hardware and software data protection, used in embedded boot code storage and firmware update applications.
For engineers reviewing the AT29C020-12TI datasheet, AT29C020-12TI pinout, AT29C020-12TI application, or AT29C020-12TI equivalent, key selection considerations include its 32-pin PLCC package, sector-lockable boot blocks, DATA polling and toggle-bit programming status detection, and compatibility with standard EPROM read interfaces.
Technical Context
The AT29C020-12TI implements a sector-based Flash architecture with 1024 independent 256-byte sectors, enabling selective erase and reprogram without full-chip erasure. Its internal address/data latches and control timer automate erase-and-program sequences upon command initiation.
It integrates dual 8K-byte boot blocks with independent lockout capability, supporting secure system boot from either lowest or highest memory addresses. Programming requires only 5 V ±10% supply, with hardware protection against low-VCC, noise, and unintended WE/CE/OE states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), directly replaces EPROMs in legacy 8-bit microcontroller systems |
| Read Access Time | 120 ns max - defines minimum bus cycle timing for CPU interface at 8.3 MHz sustained read rate |
| Sector Program Time | 10 ms typical - enables firmware patching of 256-byte segments without system interruption |
| Endurance | >10,000 program/erase cycles per sector - supports field-upgradable embedded firmware over product lifetime |
| Operating Voltage | 5 V ±10% - eliminates need for charge pumps or auxiliary voltage rails in 5 V logic systems |
| Temperature Range | –40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor equipment |
| Standby Current | 300 µA max - reduces power budget in always-on embedded controllers during idle states |
Pinout & Package
AT29C020-12TI is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), JEDEC MS-016 variation AE compliant, with 1.27 mm pitch, 12.45 mm × 14.95 mm footprint, and 3.35 mm height. Pin 1 identifier is a corner notch on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 262,144-byte addressing; A0–A7 select byte within sector, A8–A17 select sector |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with 8051, Z80, and 68K families; supports byte load and DATA polling on I/O7 |
| CE | Chip Enable | Active-low chip select; when high, places outputs in high-impedance state to prevent bus contention |
| OE | Output Enable | Active-low output control; used with CE for flexible read timing and bus sharing |
| WE | Write Enable | Active-low programming control; initiates byte load or sector program sequence when CE is low and OE high |
| VCC | Power Supply | +5 V ±10% supply input; powers core logic and charge pump circuitry for internal erase/program operations |
| GND | Ground Reference | Signal and power ground reference for all inputs, outputs, and internal circuitry |
| NC | No Connect | Unbonded pin; must remain unconnected to avoid parasitic coupling or latch-up risk |
Key Features
| Feature | Design Value |
|---|---|
| Two Independent Boot Block Lockouts | Enables permanent write-protection of first and last 8K-byte regions - secures bootloader and configuration data against accidental overwrite |
| Software Data Protection | Three-command unlock sequence (5555h/2AAAh/A0h) required before any sector program - prevents firmware corruption during power transients or software faults |
| DATA Polling & Toggle Bit Status | I/O7 complement indicates programming progress; I/O6 toggling provides alternate non-intrusive status check - eliminates need for external timers or interrupt handlers |
| Hardware VCC Sense & Noise Filtering | Program inhibited if VCC < 3.8 V; pulses < 15 ns on WE/CE ignored - ensures reliable operation in electrically noisy industrial environments |
| Single-Cycle Sector Erase/Program | Entire 256-byte sector erased and rewritten in one atomic operation - guarantees data consistency during firmware updates |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Boot Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O configuration tables in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding startup code and runtime firmware; accessed at power-on reset and during online firmware updates. Use Value: 10,000-cycle endurance and industrial temperature rating ensure multi-year reliability without recalibration or replacement; sector locking prevents corruption of safety-critical boot routines. | Use Scenario: Replacing obsolete 27C020 EPROMs in medical infusion pump controllers requiring field-upgradable therapy algorithms. IC Role / Device Role / Timing Role: In-system reprogrammable firmware store interfaced directly to 80C51 microcontroller address/data bus. Use Value: 5 V-only operation avoids redesign of existing 5 V power architecture; 70 ns read speed maintains real-time response of motor control loops during active therapy delivery. |
| Automotive Body Control Module | Point-of-Sale Terminal Configuration Memory |
Use Scenario: Holding vehicle-specific calibration data and lighting control logic in BCMs installed in engine compartments and door modules. IC Role / Device Role / Timing Role: Secure, temperature-hardened Flash memory storing EEPROM-like configuration parameters with boot block lockout for factory-set defaults. Use Value: –40°C to +85°C operation meets AEC-Q100 Grade 2 requirements; hardware VCC sense prevents spurious writes during cold cranking voltage dips. | Use Scenario: Storing localized tax tables, language packs, and peripheral driver settings in retail terminals operating 24/7 in varying ambient conditions. IC Role / Device Role / Timing Role: Field-updatable firmware repository accessed via RS-232 or USB-to-parallel bridge during maintenance windows. Use Value: 300 µA standby current extends battery backup runtime during AC outages; DATA polling allows host software to manage update progress without dedicated status lines. |
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 with 5 V tolerant I/O; 120 ns access; 100,000 endurance cycles | Requires level-shifting in pure 5 V systems; higher endurance suits frequent-field-update scenarios | Select when migrating to lower-power 3.3 V designs or requiring extended rewrite lifetime |
| MX29LV200CTTI-12G | 3 V supply only; 120 ns access; includes CFI query mode and 16-bit data bus option | Not 5 V compatible; requires PCB redesign for voltage and bus width; supports JEDEC-standard parameter interrogation | Choose for new 3 V designs needing standardized Flash interface and wider data path |
Compared with AM29LV020B-120EC and MX29LV200CTTI-12G, the AT29C020-12TI delivers drop-in 5 V compatibility and proven industrial reliability without voltage translation, making it optimal for legacy system refreshes where board-level changes are prohibited.
Availability
AT29C020-12TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system boot memory, and automotive body control module applications requiring stable component supply across extended product lifecycles.
Supply support for AT29C020-12TI 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 AT29C020-12TI belongs to Atmel's legacy 5 V Flash memory product line, designed specifically to enable in-system firmware upgrades in cost-sensitive, long-lifecycle embedded systems without requiring high-voltage programming infrastructure.
FAQ
What is the maximum operating temperature range for the AT29C020-12TI?
The AT29C020-12TI is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the DC and AC Operating Range table of the official Atmel datasheet (Rev. 0291N–FLASH–07/02), where the "-12TI" suffix explicitly denotes the industrial-grade variant. The device maintains full functionality-including 120 ns read timing and 10 ms sector programming-across this entire range.
Does the AT29C020-12TI require high-voltage programming signals?
No, the AT29C020-12TI does not require high-voltage programming signals. It operates with a single 5 V ±10% supply for both read and program/erase functions. All programming commands-including sector program, software data protection enable/disable, and boot block lockout-are executed using standard 5 V logic levels applied to CE, WE, OE, and address/data pins, as defined in the Software Data Protection Enable Algorithm and Boot Block Lockout Feature Enable Algorithm sections of the datasheet.
How many sectors does the AT29C020-12TI have, and what is the size of each sector?
The AT29C020-12TI contains 1024 independent sectors, each 256 bytes in size. This is explicitly stated in the Features section ("1024 Sectors (256 Bytes/Sector)") and reinforced by the sector programming description: "A8 to A17 specify the sector address," providing 10 address bits (2¹⁰ = 1024) for sector selection. Each sector must be loaded entirely before internal erase-and-program execution begins.
Can the AT29C020-12TI be used as a direct replacement for the AT29C020-12JC?
Yes, the AT29C020-12TI can serve as a functional replacement for the AT29C020-12JC in most applications, but with critical packaging and thermal differences. Both share identical electrical specifications (120 ns access, industrial temp range, PLCC-32 package), but the "TI" suffix denotes tape-and-reel packaging optimized for automated assembly, whereas "JC" indicates tube packaging. Electrical performance and pinout are identical; only handling and moisture sensitivity differ.
What methods are available to detect the end of a program cycle on the AT29C020-12TI?
The AT29C020-12TI provides two hardware-supported methods: DATA polling and the Toggle Bit. For DATA polling, reading the last loaded byte returns the complement of I/O7 until programming completes, then true data appears. For the Toggle Bit, repeated reads of any address cause I/O6 to toggle between 0 and 1 during programming and stabilize when complete. Both methods are detailed in Sections 3 and 11 of the datasheet and require no external components or timers.
AT29C020-12TI 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:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- 120 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
AT29C020-12TI FAQ
1.How can I place an order for AT29C020-12TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C020-12TI 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 AT29C020-12TI reliable?
The price and inventory of AT29C020-12TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C020-12TI is usually 5 days.
3.What payment methods are accepted for AT29C020-12TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C020-12TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C020-12TI?
AT29C020-12TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C020-12TI 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 AT29C020-12TI?
For technical support, including AT29C020-12TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C020-12TI requirements.
6.How does Aetrix verify that AT29C020-12TI is sourced from the original manufacturer or authorized distributors?
All AT29C020-12TI 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 AT29C020-12TI meets industry standards.
7.What is the process for return or replacement of AT29C020-12TI?
All AT29C020-12TI units undergo pre-shipment inspection (PSI). If there is an issue with AT29C020-12TI, 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 AT29C020-12TI part is unused and in its original packaging.
Return procedure for AT29C020-12TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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