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Microchip Technology AT25020A-10TU-2.7-T
- Part No.:
- AT25020A-10TU-2.7-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT25020A-10TU-2.7-T.pdf
- Description:
- IC EEPROM 2KBIT SPI 20MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,361
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Product details
Overview
AT25020A-10TU-2.7-T from Microchip Technology (formerly Atmel) is a 2-kbit serial SPI EEPROM organized as 256 words × 8 bits, operating from 2.7V to 5.5V, supporting 20 MHz clock rate at 5V, featuring 8-byte page write and hardware/software write protection. It serves as nonvolatile configuration storage in industrial control modules requiring low-voltage operation and high endurance.
For engineers reviewing the AT25020A-10TU-2.7-T datasheet, AT25020A-10TU-2.7-T pinout, AT25020A-10TU-2.7-T application, or AT25020A-10TU-2.7-T equivalent, key selection criteria include VCC range (2.7–5.5V), SPI Mode 0/3 compatibility, 1M write cycle endurance, 100-year data retention, and TSSOP-8 package footprint with HOLD/WE/WP control logic.
Technical Context
The AT25020A-10TU-2.7-T implements a synchronous slave SPI interface with separate SI/SO lines, MSB-first data transfer, and chip-select–driven command sequencing. Its internal architecture includes an 8-bit instruction register, status register with BP1/BP0 block protection bits, and automatic address increment during page writes.
It supports dual voltage operation (2.7–5.5V), self-timed 5 ms max write cycles, and hardware-level data protection via dedicated WP and HOLD pins. The device powers up in write-disabled state and requires explicit WREN instruction before programming - all operations are fully compliant with JEDEC SOIC/TSSOP timing and level specifications.
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 | 2.7V to 5.5V - enables direct integration into 3.3V and 5V microcontroller systems without level-shifting |
| Max Clock Frequency | 20 MHz at 5V - supports high-speed configuration loading in real-time embedded applications |
| Write Endurance | 1 million cycles - suitable for logging or parameter tuning in field-deployed equipment |
| Data Retention | 100 years - ensures long-term reliability in unattended infrastructure devices |
| Page Write Size | 8 bytes - balances write efficiency and granularity for small configuration updates |
| Operating Temperature | −40°C to +85°C - qualified for industrial ambient environments |
Pinout & Package
AT25020A-10TU-2.7-T is housed in an 8-lead Thin Shrink Small Outline Package (TSSOP), 0.170" wide, RoHS-compliant, with gull-wing leads and standard JEDEC MO-153 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; initiates SPI command sequence and places SO in high-Z when deasserted |
| SCK | Serial Clock | Input-only clock synchronized to master; defines timing for SI sampling and SO output edges |
| SI | Serial Data Input | Command/address/data input path; accepts op-codes (e.g., WRITE, RDSR) and memory data |
| SO | Serial Data Output | Read-data output path; tri-stated when CS high or during HOLD assertion |
| GND | Ground Reference | Primary return path for VCC and I/O signals; must be low-impedance for noise immunity |
| VCC | Power Supply | Single-supply input (2.7–5.5V); powers internal logic, memory array, and I/O buffers |
| WP | Write Protect | Hardware lock: drives all write instructions inactive when pulled low, independent of status register |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting internal address counter or command state |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Support | Interoperable with both Motorola and TI-style microcontrollers without protocol translation |
| Block Write Protection | Configurable 1/4, 1/2, or full array lock via status register BP1/BP0 bits - prevents accidental overwrites |
| Hardware + Software Write Control | WP pin and WREN/WRDI instructions provide layered protection against unintended writes |
| Self-timed Write Cycle | No external erase step required; internal timing eliminates need for host-side delay management |
| HOLD Pin Functionality | Enables multi-device SPI bus sharing by suspending communication mid-transfer without reinitialization |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping tables and user-defined logic parameters in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during power-up and runtime reconfiguration via SPI master MCU. Use Value: Ensures deterministic startup behavior and retains settings across power cycles without battery backup. |
Use Scenario: Holding sensor gain/offset coefficients and regulatory compliance logs in portable diagnostic instruments. IC Role / Device Role / Timing Role: Secure, tamper-resistant data repository interfaced to ARM Cortex-M host via SPI at ≤10 MHz. Use Value: Meets IEC 62304 data integrity requirements with 1M endurance and 100-year retention. |
| Automotive Body Control Module | Smart Energy Meter Firmware Flags |
Use Scenario: Storing seat/mirror position presets and lighting profiles in 12V automotive body electronics. IC Role / Device Role / Timing Role: SPI EEPROM used alongside CAN controller for persistent user preference storage. Use Value: Operates reliably across −40°C to +85°C with 2.7–5.5V supply tolerance accommodating vehicle battery transients. |
Use Scenario: Recording firmware version, metering calibration timestamps, and tariff schedule changes in utility-grade electricity meters. IC Role / Device Role / Timing Role: Low-power configuration memory accessed infrequently but requiring guaranteed write completion. Use Value: 5 ms max self-timed write ensures fast commit even during brown-out conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-DW | 256 Kbit capacity, same TSSOP-8 package, 5V-only (4.5–5.5V) supply range | Higher density for extended configuration sets; not suitable for 2.7V systems | Select when >2Kbit storage is needed and system operates strictly at 5V |
| BR25G256FJ-3GE2 | 256 Kbit, 1.7–5.5V supply, built-in error correction (ECC), 10M write endurance | Enhanced reliability for safety-critical firmware storage; larger die size increases cost | Choose where ECC and extended endurance justify higher BOM cost and footprint |
Compared with M95256-DW and BR25G256FJ-3GE2, the AT25020A-10TU-2.7-T offers optimal balance of low-voltage operation, industrial temperature range, and proven 1M-cycle reliability in compact TSSOP-8 - ideal for cost-sensitive, space-constrained 2Kbit configuration storage.
Availability
AT25020A-10TU-2.7-T is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, automotive body electronics, and smart metering applications requiring stable component supply and long-lifecycle support.
Supply support for AT25020A-10TU-2.7-T 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 manufacturer specializing in microcontrollers, analog, FPGA, and memory solutions, with broad industrial and automotive qualification capabilities.
The AT25020A-10TU-2.7-T belongs to Microchip's legacy Atmel serial EEPROM product line, designed specifically for reliable, low-power nonvolatile storage in resource-constrained embedded systems.
FAQ
What is the maximum SPI clock frequency supported by the AT25020A-10TU-2.7-T?
The AT25020A-10TU-2.7-T supports up to 20 MHz SCK frequency at VCC = 5.0V, 10 MHz at 2.7–3.6V, and 5 MHz at 1.8–2.7V per AC Characteristics Table 4. This allows high-throughput configuration reads in host systems while maintaining timing margins under varying supply conditions.
Does the AT25020A-10TU-2.7-T require an external erase cycle before writing?
No, the AT25020A-10TU-2.7-T performs fully self-timed write cycles with no separate erase step required. Each WRITE instruction automatically handles byte or page programming internally, completing within 5 ms maximum - simplifying firmware implementation and reducing host CPU overhead.
How does the HOLD pin function during an active SPI transaction on the AT25020A-10TU-2.7-T?
The HOLD pin on the AT25020A-10TU-2.7-T suspends serial communication when driven low while SCK is low, preserving the current address counter and command state. Communication resumes when HOLD returns high with SCK still low - enabling seamless multi-master arbitration without data loss or re-synchronization.
Can the AT25020A-10TU-2.7-T be used in 1.8V systems?
No - the AT25020A-10TU-2.7-T is specified for 2.7V to 5.5V operation only. For 1.8V systems, Microchip offers the AT25020A-10TU-1.8 variant (not this part number), which guarantees functionality down to 1.8V and has different DC/AC characteristics.
What package type is used for the AT25020A-10TU-2.7-T?
The AT25020A-10TU-2.7-T uses an 8-lead Thin Shrink Small Outline Package (TSSOP), designated as package code 8A2 per Microchip's ordering information. It measures 3.0 mm × 4.4 mm with 0.65 mm lead pitch and is RoHS-compliant and halogen-free.
AT25020A-10TU-2.7-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT25020A-10TU-2.7-T FAQ
1.How can I place an order for AT25020A-10TU-2.7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25020A-10TU-2.7-T 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-2.7-T reliable?
The price and inventory of AT25020A-10TU-2.7-T 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-2.7-T is usually 5 days.
3.What payment methods are accepted for AT25020A-10TU-2.7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25020A-10TU-2.7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25020A-10TU-2.7-T?
AT25020A-10TU-2.7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25020A-10TU-2.7-T 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-2.7-T?
For technical support, including AT25020A-10TU-2.7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25020A-10TU-2.7-T requirements.
6.How does Aetrix verify that AT25020A-10TU-2.7-T is sourced from the original manufacturer or authorized distributors?
All AT25020A-10TU-2.7-T 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-2.7-T meets industry standards.
7.What is the process for return or replacement of AT25020A-10TU-2.7-T?
All AT25020A-10TU-2.7-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25020A-10TU-2.7-T, 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-2.7-T part is unused and in its original packaging.
Return procedure for AT25020A-10TU-2.7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25020A-10TU-2.7-T Tags
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