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Microchip Technology AT29C020-10TC
- Part No.:
- AT29C020-10TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29C020-10TC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,323
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Product details
Overview
AT29C020-10TC 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 dual 8K-byte boot blocks with independent programming lockout - used in embedded system firmware storage and BIOS code retention.
For engineers reviewing the AT29C020-10TC datasheet, AT29C020-10TC pinout, AT29C020-10TC application, or AT29C020-10TC equivalent, key selection considerations include sector-based reprogramming compatibility, hardware/software data protection implementation, boot block lockout behavior, and TSOP-32 package integration into space-constrained PCB layouts.
Technical Context
The AT29C020-10TC implements sector-erase architecture with 1024 × 256-byte sectors, internal address/data latches for full-sector byte loading, and automatic erase-then-program sequencing controlled by an on-chip timer. It supports both hardware and software data protection mechanisms to prevent inadvertent writes during power transitions or noise events.
Its operation relies on standard parallel interface timing: CE/OE/WE control logic enables EPROM-like reads and byte-load–initiated sector programming; DATA polling on I/O7 and TOGGLE BIT detection on I/O6 provide non-blocking program completion signaling without requiring external wait states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), enabling full BIOS or bootloader storage in single-package footprint |
| Read Access Time | 100 ns max (tACC), compatible with 10 MHz bus timing in legacy x86 and microcontroller systems |
| Sector Program Time | 10 ms typical, allowing rapid field updates of firmware segments without full-chip erase delays |
| Endurance | >10,000 write/erase cycles per sector, supporting long-term field upgradeability |
| Supply Voltage | 5 V ±10%, eliminating need for dedicated programming voltage rails or charge pumps |
| Standby Current | 100 µA (CMOS), minimizing power draw in low-power sleep modes of embedded controllers |
| Operating Temp | 0°C to +70°C (Commercial), validated for industrial control panel and PC motherboard environments |
Pinout & Package
AT29C020-10TC uses a 32-lead Thin Small Outline Package (TSOP Type I, package code 32T), 8 mm × 20 mm body size, 0.5 mm lead pitch, JEDEC MO-142 BD compliant, optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 262,144-byte addressing; A8–A17 select sector, A0–A7 select byte within sector |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; I/O7 used for DATA polling, I/O6 for TOGGLE BIT status indication |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; inhibits programming when high |
| OE | Output Enable | Active-low output control; high-Z state prevents bus contention during programming or standby |
| WE | Write Enable | Active-low write strobe; initiates byte load or sector program; combined with CE for timing-critical command sequences |
| VCC | Power Supply | +5 V ±10% supply; powers core logic and I/O buffers; VCC sense circuitry disables programming if below 3.8 V |
| GND | Ground Reference | Signal and power return path; required for stable read/write margins and noise immunity |
| NC | No Connect | Unbonded pin; must remain unconnected to avoid parasitic coupling or ESD path issues |
Key Features
| Feature | Design Value |
|---|---|
| Sector-based reprogramming | Enables selective firmware patching without erasing entire memory - reduces update time and wear on unused sectors |
| Dual 8K-byte boot blocks with lockout | Protects critical startup code from accidental overwrite; lockout can be enabled independently for lower (0x00000–0x01FFF) or upper (0x3E000–0x3FFFF) blocks |
| Hardware + software data protection | VCC sensing, 5 ms power-on delay, and 3-byte unlock sequence prevent spurious writes during brown-out or noise events |
| DATA polling & TOGGLE BIT | Allows real-time program status monitoring via I/O7 complement or I/O6 toggling - eliminates need for fixed timeout delays |
| CMOS/TTL-compatible I/O | Supports direct interfacing with both legacy 5 V TTL microcontrollers and modern CMOS logic without level-shifting |
Applications
| PC BIOS Storage | Industrial PLC Firmware |
|---|---|
Use Scenario: Storing and updating system BIOS code in desktop and server motherboards. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with in-system reprogrammability via standard ISA/LPC bus interface. Use Value: Enables field-upgradable BIOS without socketed EPROM replacement; boot block lockout secures initial boot vector against corruption. | Use Scenario: Retaining ladder logic programs and configuration data in programmable logic controllers. IC Role / Device Role / Timing Role: Persistent program memory accessed by 8/16-bit microcontrollers during cold start and runtime updates. Use Value: 10,000-cycle endurance supports decades of factory-floor firmware revisions; 100 µA standby current extends battery-backed operation. |
| Embedded Network Router Bootloader | Medical Device Configuration Memory |
Use Scenario: Holding bootloader code that initializes Ethernet PHY, loads Linux kernel from flash or network. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector; accessed in early boot stage before DRAM initialization. Use Value: 70 ns read access ensures minimal boot latency; sector programming allows safe OTA bootloader patches without risking bricking. | Use Scenario: Storing calibration coefficients, device serial numbers, and regulatory compliance settings in diagnostic imaging equipment. IC Role / Device Role / Timing Role: Secure parameter storage with hardware write-inhibit and software lockout preventing unauthorized configuration changes. Use Value: Dual boot block lockout isolates FDA-mandated calibration data; DATA polling enables deterministic update verification for audit trails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV200CTTI-70G | 3 V core (5 V tolerant I/O), 70 ns access, 100,000 endurance cycles, no boot block lockout | Lacks dedicated boot block protection; requires external voltage translation in 5 V systems | Preferred for new low-power designs where 3 V operation is acceptable and boot security is handled externally |
| EN29LV200AB-70TCP | 5 V only, 70 ns access, 100,000 endurance, boot block architecture but different sector map (32K + 4×4K) | Boot block layout differs; software identification and lockout algorithms are not compatible with AT29C020-10TC | Drop-in replacement only if firmware layer abstracts sector geometry and lockout commands |
Compared with MX29LV200CTTI-70G and EN29LV200AB-70TCP, the AT29C020-10TC offers proven 5 V simplicity and deterministic boot block lockout behavior ideal for legacy system upgrades, while alternatives trade off endurance or require firmware adaptation for sector management.
Availability
AT29C020-10TC is available at Aetrix Electronics and suitable for PC motherboard BIOS, industrial PLC firmware, and embedded router bootloader applications requiring stable component supply across extended product lifecycles.
Supply support for AT29C020-10TC 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, nonvolatile memory, and secure authentication devices.
The AT29C020-10TC belongs to Atmel's legacy parallel Flash memory product line, designed specifically for cost-sensitive, 5 V–based embedded systems needing reliable in-system firmware storage with robust data protection.
FAQ
What is the maximum operating temperature range for the AT29C020-10TC?
The AT29C020-10TC is rated for commercial temperature operation from 0°C to +70°C. Its datasheet specifies this range explicitly in the Ordering Information table and DC/AC Operating Range section. While the absolute maximum rating extends to +125°C, functional operation is guaranteed only within the 0°C to +70°C range. This makes the AT29C020-10TC suitable for office and lab environments but not for under-hood automotive or high-temperature industrial enclosures unless derated.
Does the AT29C020-10TC support full-chip erase?
Yes, the AT29C020-10TC supports optional software chip erase using a 6-byte command sequence documented in the datasheet. However, this function is disabled if either boot block programming lockout feature has been activated. The chip erase operation clears all 262,144 bytes simultaneously and is distinct from sector erase. It requires precise timing and address/data inputs - failure to follow the exact sequence results in no action or unintended sector programming.
How does the boot block lockout feature work on the AT29C020-10TC?
The AT29C020-10TC contains two 8K-byte boot blocks - one at addresses 0x00000–0x01FFF (lower) and one at 0x3E000–0x3FFFF (upper). Each can be independently locked using a 7-command software algorithm. Once locked, those blocks become permanently read-only: no erase or program operations are possible. Lock status is verified by reading 0x00002 (lower) or 0x3FFF2 (upper); FE indicates unlocked, FF indicates locked. The AT29C020-10TC retains lock state across power cycles.
Can the AT29C020-10TC be programmed using standard EPROM programmers?
No, the AT29C020-10TC cannot be programmed using conventional EPROM programmers. It requires in-system programming via its parallel interface using specific command sequences (e.g., AAh/55h/A0h for program enable). Unlike EPROMs, it lacks UV-erasable windows and does not accept standard EPROM programming voltages. Programming must occur with VCC = 5 V ±10%; no VPP or elevated voltage is needed, but timing-critical WE/CE pulses and address/data latching must comply with AC Byte Load specifications.
What package type is used for the AT29C020-10TC?
The AT29C020-10TC uses a 32-lead Thin Small Outline Package (TSOP Type I), designated as package code 32T. Its dimensions are 8 mm × 20 mm with 0.5 mm lead pitch, JEDEC MO-142 BD compliant. This surface-mount package supports automated assembly and provides better thermal performance and board density than the PDIP or PLCC variants of the same device. Pin 1 is marked by a beveled corner on the package body.
AT29C020-10TC 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:
- 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-TSOP
AT29C020-10TC FAQ
1.How can I place an order for AT29C020-10TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C020-10TC 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 AT29C020-10TC reliable?
The price and inventory of AT29C020-10TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C020-10TC is usually 5 days.
3.What payment methods are accepted for AT29C020-10TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C020-10TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C020-10TC?
AT29C020-10TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C020-10TC 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 AT29C020-10TC?
For technical support, including AT29C020-10TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C020-10TC requirements.
6.How does Aetrix verify that AT29C020-10TC is sourced from the original manufacturer or authorized distributors?
All AT29C020-10TC 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 AT29C020-10TC meets industry standards.
7.What is the process for return or replacement of AT29C020-10TC?
All AT29C020-10TC units undergo pre-shipment inspection (PSI). If there is an issue with AT29C020-10TC, 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 AT29C020-10TC part is unused and in its original packaging.
Return procedure for AT29C020-10TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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