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Microchip Technology AT25128A-10TI-2.7
- Part No.:
- AT25128A-10TI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT25128A-10TI-2.7.pdf
- Description:
- IC EEPROM 128KBIT SPI 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,578
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Product details
Overview
AT25128A-10TI-2.7 from Microchip Technology (formerly Atmel) is a 128 Kbit SPI serial EEPROM organized as 16,384 × 8 bits, operating from 2.7V to 5.5V, supporting 20 MHz clock rate at 5V, with 64-byte page write capability and hardware/software write protection via WP and HOLD pins. It serves as nonvolatile memory for firmware storage, calibration data retention, and configuration parameter backup in industrial control modules.
For engineers reviewing the AT25128A-10TI-2.7 datasheet, AT25128A-10TI-2.7 pinout, AT25128A-10TI-2.7 application, or AT25128A-10TI-2.7 equivalent, this device delivers verified SPI Mode 0/3 compatibility, automotive-grade temperature range (−40°C to +85°C), block write protection (1/4, 1/2, or full array), self-timed 5 ms max write cycle, and JEDEC SOIC-8 packaging with lead-free/halogen-free compliance.
Technical Context
The AT25128A-10TI-2.7 implements a synchronous SPI slave interface with dedicated SI (input), SO (output), SCK (clock), and CS (chip select) signals, requiring no external erase cycle before write. Its status register (8-bit) controls write enable (WEN), ready/busy (RDY), block protection (BP0/BP1), and write protect enable (WPEN) functions.
It supports dual-voltage operation (2.7–5.5V), delivers 100,000 write cycles endurance and >100 years data retention, and features HOLD pin suspension of ongoing serial transfers without resetting sequence state - critical for real-time systems where bus arbitration must preserve transaction integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 128 Kbit (16,384 × 8) - sufficient for storing bootloader config, sensor calibration tables, or device identity data in space-constrained designs |
| Supply Voltage Range | 2.7V to 5.5V - enables direct integration with 3.3V and 5V microcontroller I/O domains without level shifting |
| Max Clock Frequency | 20 MHz at VCC = 5.0V - supports high-throughput programming in production test environments |
| Write Cycle Time | 5 ms maximum - deterministic timing simplifies host firmware timeout handling during page writes |
| Endurance | 100,000 write cycles - meets industrial logging requirements for field-deployed equipment with daily parameter updates |
| Data Retention | >100 years - ensures long-term reliability for unattended infrastructure devices (e.g., smart meters, remote sensors) |
| Operating Temperature | −40°C to +85°C - certified for industrial ambient conditions without derating |
Pinout & Package
AT25128A-10TI-2.7 is housed in an 8-lead JEDEC SOIC package (8S1), 0.150" wide body, RoHS-compliant, with standard gull-wing leads and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; drives device into active mode only when low, placing SO in high-impedance state otherwise |
| SCK | Serial Clock Input | Master-generated clock synchronizing all SI/SO data transfers; supports SPI Modes 0 and 3 |
| SI | Serial Data Input | Receives op-codes, addresses, and write data; MSB-first transmission required per SPI protocol |
| SO | Serial Data Output | Drives read data and status register contents; tri-states automatically when CS is high or HOLD is asserted |
| GND | Ground Reference | Primary return path for VCC and all I/O signals; must be low-impedance connection to avoid noise-induced communication errors |
| VCC | Power Supply | Single-supply input supporting 2.7–5.5V; internal regulation ensures stable core voltage across full range |
| WP | Hardware Write Protect | When WPEN=1 and WP=low, blocks all status register writes and protected memory writes - prevents accidental firmware corruption |
| HOLD | Serial Communication Suspend | Pauses ongoing SPI transfer (e.g., mid-read or mid-write) without resetting address counter or command state |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Compatibility | Direct interoperability with ARM Cortex-M, PIC, and STM32 microcontrollers using standard SPI peripheral drivers without custom timing adjustments |
| 64-byte Page Write | Reduces firmware overhead by enabling burst writes up to 64 bytes per CS assertion - cuts programming time vs. byte-by-byte writes |
| Block Write Protection | Configurable top 1/4, 1/2, or full memory array lock via status register - isolates critical boot code from runtime overwrites |
| Self-timed Write Cycle | No external erase step needed; internal timing eliminates host polling complexity and guarantees completion within 5 ms |
| HOLD Pin Functionality | Enables multi-master arbitration by suspending serial transfers without losing context - essential for shared SPI buses in modular systems |
Applications
| Industrial PLC Configuration Storage | Automotive ECU Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during power-up and runtime reconfiguration; operates under SPI Mode 0 at 10 MHz. Use Value: Ensures deterministic startup behavior and field-upgradable settings without requiring external backup batteries or supercapacitors. |
Use Scenario: Retaining engine calibration maps, sensor offset corrections, and diagnostic trouble code (DTC) history in automotive powertrain control units. IC Role / Device Role / Timing Role: SPI-connected EEPROM providing AEC-Q100-compliant data persistence across thermal cycling and vibration stress. Use Value: Meets automotive functional safety requirements for parameter retention over 15+ year vehicle lifetimes with guaranteed >100K write cycles. |
| Medical Device Parameter Backup | Smart Meter Firmware Metadata |
Use Scenario: Saving user-adjustable therapy settings, device serial numbers, and usage logs in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Low-power, write-protected memory interfaced to an ARM-based MCU; leverages HOLD to pause reads during interrupt service routines. Use Value: Maintains regulatory compliance (IEC 62304) by ensuring tamper-resistant storage of safety-critical operational parameters. |
Use Scenario: Storing firmware version stamps, cryptographic keys, and tariff schedule timestamps in utility-grade electricity meters operating in harsh outdoor environments. IC Role / Device Role / Timing Role: Industrial-grade EEPROM with −40°C to +85°C operation and halogen-free packaging; accessed during meter boot and OTA update verification. Use Value: Provides secure, long-life metadata storage resistant to voltage brownouts and electromagnetic interference common in grid infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95128-WMN6TP | STMicroelectronics 128 Kbit SPI EEPROM; identical 2.7–5.5V supply, 20 MHz max clock, and SOIC-8 package; differs in status register bit layout and HOLD timing specs | Same industrial temperature grade but lacks WPEN-controlled hardware write protection granularity - uses simpler WP-only blocking | Select when legacy ST ecosystem integration or specific qualification history is required; verify HOLD timing margins against host controller setup/hold constraints |
| BR24G128FJ-3GE2 | Rohm 128 Kbit SPI EEPROM; supports 1.7–5.5V range, 10 MHz max clock at 1.8V, SOIC-8; includes built-in error correction (ECC) and enhanced write endurance (400K cycles) | Superior low-voltage performance and ECC support suit battery-powered IoT nodes; not drop-in due to different status register map and slower max speed at 5V | Prefer for energy-harvesting or coin-cell applications needing extended write lifetime and fault resilience; requires firmware adaptation for status register access |
Compared with M95128-WMN6TP and BR24G128FJ-3GE2, the AT25128A-10TI-2.7 offers finer-grained block protection (1/4/1/2/full array) and deterministic 5 ms write timing, making it optimal for industrial systems requiring precise configuration lockdown and predictable firmware update latency.
Availability
AT25128A-10TI-2.7 is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, medical infusion devices, and smart metering systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for AT25128A-10TI-2.7 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 acquired Atmel in 2016 and maintains full product continuity, technical documentation, and manufacturing control for the AT25xxx family of serial EEPROMs.
The AT25128A series was designed specifically for robust, low-power nonvolatile memory in industrial and automotive applications demanding high reliability, flexible write protection, and seamless SPI integration with mainstream MCUs.
FAQ
What is the maximum clock frequency supported by AT25128A-10TI-2.7?
The AT25128A-10TI-2.7 supports up to 20 MHz SCK frequency when operated at VCC = 5.0V. At lower supply voltages (e.g., 2.7V), the maximum rated clock frequency drops to 10 MHz per AC characteristics tables. This ensures reliable timing margin across its full 2.7–5.5V operating range, and the AT25128A-10TI-2.7 datasheet specifies exact tWH/tWL values for each voltage bin to guide host controller configuration.
Does AT25128A-10TI-2.7 require an external erase cycle before writing?
No, the AT25128A-10TI-2.7 performs fully self-timed write operations with no separate erase step required. Each WRITE instruction automatically handles erase-and-program internally, completing within 5 ms maximum. The AT25128A-10TI-2.7 remains responsive to RDSR commands during this cycle to report RDY/BUSY status, simplifying host firmware design versus parallel EEPROM architectures.
How does the HOLD pin function on AT25128A-10TI-2.7?
The HOLD pin on AT25128A-10TI-2.7 suspends ongoing SPI communication (read or write) 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 until de-asserted. This allows multi-master arbitration or CPU interrupt servicing without corrupting the current transaction - a key feature confirmed in the AT25128A-10TI-2.7 functional description and timing diagrams.
What package type is used for AT25128A-10TI-2.7?
AT25128A-10TI-2.7 uses an 8-lead JEDEC SOIC package (designated 8S1), 0.150" wide body, with gull-wing leads and 1.27 mm pitch. This package is RoHS-compliant, halogen-free, and qualified for industrial temperature range (−40°C to +85°C). The AT25128A-10TI-2.7 ordering information explicitly maps "-10TI-2.7" to the 8S1 footprint, distinguishing it from PDIP, TSSOP, or dBGA2 variants.
Can AT25128A-10TI-2.7 be used in automotive applications?
Yes, AT25128A-10TI-2.7 is specified for industrial temperature range (−40°C to +85°C) and offered in automotive-grade versions (e.g., AT25128A-10SE-2.7 for −40°C to +125°C). While the AT25128A-10TI-2.7 itself is not AEC-Q200 certified, its construction, testing, and qualification data align with automotive subsystem requirements for infotainment, body control, and sensor modules where extended temperature tolerance is mandatory.
AT25128A-10TI-2.7 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:
- 128Kbit
- Memory Organization:
- 16K 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
AT25128A-10TI-2.7 FAQ
1.How can I place an order for AT25128A-10TI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25128A-10TI-2.7 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 AT25128A-10TI-2.7 reliable?
The price and inventory of AT25128A-10TI-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25128A-10TI-2.7 is usually 5 days.
3.What payment methods are accepted for AT25128A-10TI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25128A-10TI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25128A-10TI-2.7?
AT25128A-10TI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25128A-10TI-2.7 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 AT25128A-10TI-2.7?
For technical support, including AT25128A-10TI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25128A-10TI-2.7 requirements.
6.How does Aetrix verify that AT25128A-10TI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT25128A-10TI-2.7 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 AT25128A-10TI-2.7 meets industry standards.
7.What is the process for return or replacement of AT25128A-10TI-2.7?
All AT25128A-10TI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT25128A-10TI-2.7, 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 AT25128A-10TI-2.7 part is unused and in its original packaging.
Return procedure for AT25128A-10TI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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