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Microchip Technology AT25020A-10TU-1.8
- Part No.:
- AT25020A-10TU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT25020A-10TU-1.8.pdf
- Description:
- IC EEPROM 2KBIT SPI 20MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,658
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Product details
Overview
AT25020A-10TU-1.8 from Microchip Technology (formerly Atmel) is a 2-kbit serial SPI EEPROM organized as 256 × 8 bits, supporting 1.8 V to 5.5 V operation, 20 MHz clock rate at 5 V, 8-byte page write mode, and hardware/software write protection via WP pin and status register. It serves as nonvolatile configuration storage in microcontroller-based industrial control modules.
For engineers reviewing the AT25020A-10TU-1.8 datasheet, AT25020A-10TU-1.8 pinout, AT25020A-10TU-1.8 application, or AT25020A-10TU-1.8 equivalent, key selection criteria include low-voltage compatibility (1.8 V min), TSSOP-8 package footprint, SPI Mode 0/3 support, block write protection granularity, and 1 million endurance cycles with 100-year data retention.
Technical Context
The AT25020A-10TU-1.8 operates as an SPI slave device with separate SI/SO lines, MSB-first data framing, and CS-driven command initiation. Its internal architecture includes a 256-word memory array, status register with BP1/BP0 for 1/4–full-array protection, and dedicated WREN/WRDI/RDSR/WRSR instructions.
Timing is synchronized to SCK with configurable setup/hold times (e.g., tSU = 80 ns at 1.8 V), self-timed 5 ms max write cycle, and HOLD pin support for pausing communication without sequence reset. The device powers up in write-disabled state and requires explicit WREN before programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8), sufficient for firmware boot flags, calibration coefficients, or sensor offset tables. |
| Supply Voltage Range | 1.8 V to 5.5 V - enables direct interface with 1.8 V logic systems without level shifting. |
| Max Clock Frequency | 20 MHz at VCC = 5 V - supports high-throughput configuration loading in real-time systems. |
| Write Endurance | 1 million cycles - suitable for field-updatable parameters with frequent reprogramming. |
| Data Retention | 100 years at +25 °C - ensures long-term reliability in unattended embedded deployments. |
| Page Write Size | 8 bytes - minimizes write latency per transaction while avoiding excessive overwrites in partial updates. |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial-grade environmental stress without derating. |
Pinout & Package
AT25020A-10TU-1.8 uses an 8-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, body size 3.00 mm × 4.4 mm, 0.65 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be low to accept op-codes and data; high impedance on SO when deasserted. |
| SCK | Serial Clock | Input-only master-generated clock; defines timing for SI sampling and SO output edges (Mode 0/3 compatible). |
| SI | Serial Data Input | Accepts op-code, address, and write data; ignored during HOLD or when CS is high. |
| SO | Serial Data Output | Drives read data or status register contents; tri-states when CS high or HOLD active. |
| GND | Ground Reference | Return path for all I/O and power; must be low-impedance to minimize noise coupling into SPI signals. |
| VCC | Power Supply | Single supply input (1.8–5.5 V); powers internal logic, memory array, and I/O buffers. |
| WP | Write Protect | Hardware lock: low disables all writes regardless of WREN status; overrides software protection. |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting address counter; requires SCK low to assert/deassert. |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 and 3 Support | Interoperates with diverse MCUs including 68HC11, ARM Cortex-M, and PIC families without protocol translation. |
| Block Write Protection | Configurable via status register to protect 0%, 25%, 50%, or 100% of memory - prevents accidental overwrite of critical calibration data. |
| Self-Timed Write Cycle | No external erase step required; internal timing ensures reliable programming completion within 5 ms max - simplifies firmware driver design. |
| Low Standby Current | 0.1 µA at 1.8 V - extends battery life in portable or energy-harvesting sensor nodes. |
| HOLD Pin Functionality | Enables multi-device SPI bus sharing by suspending AT25020A-10TU-1.8 mid-transfer without losing byte alignment or address state. |
Applications
| Industrial PLC I/O Module | Medical Sensor Calibration Storage |
|---|---|
Use Scenario: Storing channel-specific gain/offset coefficients and firmware revision metadata in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during power-up initialization and runtime parameter updates via SPI. Use Value: Enables field recalibration without firmware reflashing; 1.8 V operation allows direct connection to low-power MCU I/O banks. | Use Scenario: Retaining factory-trimmed ADC reference offsets and patient-specific alarm thresholds in portable ECG monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for safety-critical calibration data, protected via WP pin during normal operation. Use Value: Meets IEC 62304 Class B software requirements through deterministic 5 ms write timing and 100-year data retention. |
| Automotive Body Control Unit | Smart Energy Meter Firmware Flags |
Use Scenario: Holding seat position memory, mirror angle presets, and lighting configuration in 12 V automotive subsystems with local 3.3 V regulation. IC Role / Device Role / Timing Role: SPI-configurable persistent storage interfaced to an 8-bit automotive MCU with limited internal NVM. Use Value: −40 °C to +85 °C rating ensures reliability across under-hood thermal cycling; TSSOP-8 footprint fits constrained PCB layouts. | Use Scenario: Storing tariff schedule changes, meter ID, and cryptographic keys in utility-grade electricity meters with 10+ year service life. IC Role / Device Role / Timing Role: High-endurance nonvolatile memory updated infrequently but requiring absolute data integrity over decades. Use Value: 1 million write cycles and 100-year retention eliminate need for periodic replacement; block protection prevents corruption during power-loss events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-DWDW4TP/K | 256 Kbit capacity, 5 V only (4.5–5.5 V), no 1.8 V support; same TSSOP-8 package. | Higher density for larger configuration sets; unsuitable for 1.8 V systems. | Select when >2 Kbit storage is needed and system VCC ≥ 4.5 V. |
| BR25L20FJ-WE2 | 2 Kbit, 1.7–5.5 V range, same 8-pin TSSOP, but supports SPI Mode 0 only (not Mode 3). | Compatible voltage range and pinout; lacks Mode 3 interoperability with legacy 68HC11 designs. | Select for new designs targeting broad MCU compatibility where Mode 3 is unused. |
Compared with M95256-DWDW4TP/K and BR25L20FJ-WE2, the AT25020A-10TU-1.8 uniquely balances 1.8 V operation, Mode 0/3 flexibility, and industrial temperature range in a space-constrained TSSOP-8 package - making it optimal for mixed-voltage, legacy-compatible embedded systems.
Availability
AT25020A-10TU-1.8 is available at Aetrix Electronics and suitable for industrial PLCs, medical sensor calibration, automotive body control units, and smart energy meters requiring stable component supply across extended product lifecycles.
Supply support for AT25020A-10TU-1.8 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
Microchip Technology is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with a focus on embedded control and connectivity.
The AT25020A-10TU-1.8 belongs to Microchip's serial EEPROM product line, designed specifically for low-voltage, high-reliability nonvolatile storage in resource-constrained industrial and automotive applications.
FAQ
What is the maximum clock frequency supported by AT25020A-10TU-1.8 at 1.8 V?
The AT25020A-10TU-1.8 supports up to 5 MHz SCK frequency when operating at 1.8 V, as specified in Table 4 AC Characteristics under the 1.8–5.5 V column. This ensures robust timing margins for low-voltage systems while maintaining compatibility with standard SPI peripherals.
Does AT25020A-10TU-1.8 require an external erase command before writing?
No, the AT25020A-10TU-1.8 does not require a separate erase command. All write operations are self-timed and automatically erase and program the target location within the 5 ms maximum write cycle time. Only a WREN instruction precedes WRITE to enable the latch.
How is memory protection configured on AT25020A-10TU-1.8?
Memory protection on AT25020A-10TU-1.8 is configured using the status register's BP1 and BP0 bits (Table 8). Writing specific values via WRSR instruction enables protection of 0%, 25%, 50%, or 100% of the 256-byte array - independent of the WP pin state.
Can AT25020A-10TU-1.8 operate in SPI Mode 3 (CPOL=1, CPHA=1)?
Yes, the AT25020A-10TU-1.8 explicitly supports SPI Mode 3 per its datasheet Features section. It is compatible with both Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), enabling interoperability with legacy 68HC11-family microcontrollers and modern SPI masters.
What is the function of the HOLD pin on AT25020A-10TU-1.8?
The HOLD pin on AT25020A-10TU-1.8 suspends ongoing SPI communication without resetting the internal address counter or command state. When asserted low while SCK is low, it places SO in high-impedance and ignores SI inputs - allowing bus arbitration in multi-slave systems.
AT25020A-10TU-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 20 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT25020A-10TU-1.8 FAQ
1.How can I place an order for AT25020A-10TU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25020A-10TU-1.8 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 AT25020A-10TU-1.8 reliable?
The price and inventory of AT25020A-10TU-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25020A-10TU-1.8 is usually 5 days.
3.What payment methods are accepted for AT25020A-10TU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25020A-10TU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25020A-10TU-1.8?
AT25020A-10TU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25020A-10TU-1.8 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 AT25020A-10TU-1.8?
For technical support, including AT25020A-10TU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25020A-10TU-1.8 requirements.
6.How does Aetrix verify that AT25020A-10TU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT25020A-10TU-1.8 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 AT25020A-10TU-1.8 meets industry standards.
7.What is the process for return or replacement of AT25020A-10TU-1.8?
All AT25020A-10TU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT25020A-10TU-1.8, 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 AT25020A-10TU-1.8 part is unused and in its original packaging.
Return procedure for AT25020A-10TU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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