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Microchip Technology AT25020A-10TI-1.8
- Part No.:
- AT25020A-10TI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT25020A-10TI-1.8.pdf
- Description:
- IC EEPROM 2KBIT SPI 20MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,902
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Product details
Overview
AT25020A-10TI-1.8 from Microchip Technology (formerly Atmel) is a 2-kbit SPI serial EEPROM organized as 256 words × 8 bits, operating from 1.8 V to 5.5 V with 20 MHz clock rate at 5 V, 8-byte page write capability, and hardware/software write protection. It serves as nonvolatile configuration storage in microcontroller-based industrial control modules requiring low-voltage operation and automotive-grade reliability.
For engineers reviewing the AT25020A-10TI-1.8 datasheet, AT25020A-10TI-1.8 pinout, AT25020A-10TI-1.8 application, or AT25020A-10TI-1.8 equivalent, key selection criteria include 1.8 V minimum supply voltage, TSSOP-8 package footprint, block write protection granularity (1/4, 1/2, or full array), HOLD pin support for interruptible communication, and 1 million write cycle endurance.
Technical Context
The AT25020A-10TI-1.8 implements a synchronous SPI slave interface compliant with Modes 0 and 3, using separate SI/SO pins and CS-controlled selection. Its internal architecture includes an 8-bit instruction register, status register with BP1/BP0 nonvolatile protection bits, and automatic address increment during sequential reads.
Write operations require explicit WREN instruction followed by WRITE command; self-timed internal write cycles complete in ≤5 ms with no external erase step. The HOLD pin suspends ongoing transfers without resetting the sequence, while WP pin provides hardware-level write inhibition independent of software state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8-bit words) - fixed allocation for firmware parameter storage or calibration data tables |
| Supply Voltage Range | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V, 2.7 V, 3.3 V, and 5 V logic systems without level shifting |
| Max Clock Frequency | 20 MHz at VCC = 5 V - supports high-throughput configuration loading in real-time embedded systems |
| Page Write Size | 8 bytes - limits burst programming efficiency but reduces risk of partial writes during power loss |
| Write Endurance | 1 million cycles - ensures long-term reliability in field-updatable devices with frequent parameter changes |
| Data Retention | 100 years - guarantees persistent storage of critical calibration or security keys over product lifetime |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood applications |
Pinout & Package
AT25020A-10TI-1.8 is supplied in an 8-lead Thin Shrink Small Outline Package (TSSOP), 0.170" wide body, with 0.65 mm lead pitch and JEDEC MO-153 compliant dimensions (D = 3.00 mm, E1 = 4.40 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; initiates SPI transaction and places SO in high-impedance when deasserted |
| SCK | Serial Clock | Master-generated clock input; timing reference for SI sampling and SO output edges per SPI Mode 0/3 |
| SI | Serial Data Input | Asynchronous data input path for op-codes, addresses, and write data; ignored during HOLD or CS high |
| SO | Serial Data Output | Tri-state output delivering read data or status register contents; high-Z when CS high or HOLD active |
| GND | Ground Reference | Primary return path for VCC current and logic reference; requires low-impedance PCB connection |
| VCC | Power Supply | Single-supply input supporting 1.8–5.5 V; decoupling capacitor required within 10 mm of pin |
| WP | Write Protect | Hardware lock: drives all write instructions invalid when pulled low, regardless of status register setting |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting internal address counter; requires SCK low to assert/deassert |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Compatibility | Interoperates with diverse MCU families including 68HC11, ARM Cortex-M, and PIC without protocol translation |
| Block Write Protection | Four configurable protection levels (none, 1/4, 1/2, full array) via nonvolatile BP1/BP0 bits in status register |
| Hardware + Software Write Lock | Simultaneous use of WP pin and WREN/WRDI instructions enables layered data integrity enforcement |
| Self-timed Write Cycle | No external timing control needed; internal oscillator manages erase/write; RDSR polling confirms completion |
| HOLD Pin Functionality | Enables multi-master arbitration or CPU context switching without losing SPI state or address pointer |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Storing calibrated sensor offsets and actuator dead-band values across power cycles in programmable logic controller expansion modules. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via SPI during boot and runtime reconfiguration. Use Value: Enables field recalibration without firmware update; 1.8 V operation allows direct integration with low-power FPGA I/O banks. | Use Scenario: Holding door lock timeout settings, mirror position presets, and lighting dimming profiles in vehicle body electronics. IC Role / Device Role / Timing Role: SPI-connected parameter store synchronized to microcontroller's peripheral clock domain. Use Value: Automotive-grade temperature range and 100-year retention ensure settings persist over 15+ year vehicle lifespan. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Recording dose history, alarm thresholds, and user preferences in battery-backed portable infusion devices. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced to ARM Cortex-M0+ MCU for secure parameter logging. Use Value: 1.8 V minimum supply supports operation during brown-out conditions; WP pin prevents accidental overwrite during fault recovery. | Use Scenario: Storing tariff schedules, metering calibration constants, and tamper-event logs in ANSI C12.22-compliant utility meters. IC Role / Device Role / Timing Role: SPI-configurable nonvolatile memory accessed during meter initialization and periodic data commits. Use Value: 1 million write cycles accommodate daily log entries for >27 years; TSSOP-8 footprint minimizes PCB area in space-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-DWDW3TP/K | 256 Kbit capacity, 5 MHz max clock at 1.8 V, WLCSP-8 package | Higher density for complex configuration sets; lower speed limits real-time updates | Select when >2 Kbit storage is required and board space permits WLCSP rework |
| BR25G256FJ-3GE2 | 256 Kbit, 10 MHz max clock, 1.6–5.5 V range, built-in error correction | Enhanced data integrity for safety-critical logging; larger memory reduces partitioning overhead | Prefer for medical or industrial systems requiring ECC and extended voltage margin |
Compared with AT25020A-10TI-1.8, M95256-DWDW3TP/K offers 128× more capacity but sacrifices speed and package compatibility, while BR25G256FJ-3GE2 adds ECC and wider voltage tolerance at cost of higher unit price and different pinout - neither is pin-compatible, making AT25020A-10TI-1.8 optimal for cost-sensitive, space-constrained 2 Kbit use cases.
Availability
AT25020A-10TI-1.8 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, medical infusion pumps, and smart energy meters requiring stable component supply across extended product lifecycles.
Supply support for AT25020A-10TI-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 series belongs to Microchip's legacy SPI EEPROM product line, designed specifically for reliable, low-voltage nonvolatile storage in industrial, automotive, and medical applications where write endurance and data retention are critical.
FAQ
What is the maximum clock frequency supported by AT25020A-10TI-1.8 at 1.8 V?
At 1.8 V supply, the AT25020A-10TI-1.8 supports up to 5 MHz SCK frequency per AC Characteristics Table 4. This is lower than its 20 MHz rating at 5 V, reflecting reduced internal timing margins at minimum voltage. Designers must configure their SPI master accordingly to avoid setup/hold violations.
Does AT25020A-10TI-1.8 support both SPI Mode 0 and Mode 3 simultaneously?
No - the AT25020A-10TI-1.8 supports either SPI Mode 0 (CPOL = 0, CPHA = 0) or Mode 3 (CPOL = 1, CPHA = 1), but the mode is determined by the host controller's clock polarity and phase settings. The device itself has no internal mode selection; it responds correctly to either configuration as specified in the datasheet.
How does the HOLD pin function during an active write cycle in AT25020A-10TI-1.8?
The HOLD pin is inactive during an internal write cycle in AT25020A-10TI-1.8 - once the write is initiated (CS high after data clocking), the device ignores HOLD until the write completes. HOLD only affects ongoing read/write transactions before CS goes high; it cannot pause or abort an active self-timed write.
Can AT25020A-10TI-1.8 be used in place of AT25020A-10TI-2.7 on the same PCB?
Yes - AT25020A-10TI-1.8 and AT25020A-10TI-2.7 share identical TSSOP-8 packaging, pinout, and functional behavior. The only difference is the guaranteed minimum supply voltage (1.8 V vs. 2.7 V). Using the -1.8 variant in a 2.7 V system is fully compatible and provides additional voltage headroom.
What protection mechanisms prevent unintended writes to AT25020A-10TI-1.8?
AT25020A-10TI-1.8 employs three independent protections: (1) Write Enable Latch requiring WREN instruction before any write, (2) nonvolatile BP1/BP0 bits enabling 1/4, 1/2, or full-array hardware block protection, and (3) dedicated WP pin that disables all writes when pulled low - all layers must be satisfied for successful programming.
AT25020A-10TI-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-10TI-1.8 FAQ
1.How can I place an order for AT25020A-10TI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25020A-10TI-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-10TI-1.8 reliable?
The price and inventory of AT25020A-10TI-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-10TI-1.8 is usually 5 days.
3.What payment methods are accepted for AT25020A-10TI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25020A-10TI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25020A-10TI-1.8?
AT25020A-10TI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25020A-10TI-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-10TI-1.8?
For technical support, including AT25020A-10TI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25020A-10TI-1.8 requirements.
6.How does Aetrix verify that AT25020A-10TI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT25020A-10TI-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-10TI-1.8 meets industry standards.
7.What is the process for return or replacement of AT25020A-10TI-1.8?
All AT25020A-10TI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT25020A-10TI-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-10TI-1.8 part is unused and in its original packaging.
Return procedure for AT25020A-10TI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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