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Microchip Technology AT25128N-10SC-1.8
- Part No.:
- AT25128N-10SC-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25128N-10SC-1.8.pdf
- Description:
- IC EEPROM 128KBIT SPI 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,831
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Product details
Overview
AT25128N-10SC-1.8 from Atmel (now Microchip) is a 128 Kbit SPI serial EEPROM organized as 16,384 × 8 bits, operating at 1.8 V to 3.6 V supply, supporting 3 MHz clock rate, 64-byte page write, and hardware/software write protection via WP/HOLD pins. It serves as nonvolatile configuration storage in low-power embedded systems such as smart meters and IoT sensor nodes.
For engineers reviewing the AT25128N-10SC-1.8 datasheet, AT25128N-10SC-1.8 pinout, AT25128N-10SC-1.8 application, or AT25128N-10SC-1.8 equivalent, this page delivers verified electrical specs, SOIC-8 pin mapping, industrial-grade reliability data (100K write cycles, >200-year retention), and real-world use cases for secure firmware parameter storage.
Technical Context
The AT25128N-10SC-1.8 implements a standard 3-wire SPI slave interface with separate SI/SO lines, supports SPI Modes 0 and 3, and uses MSB-first transmission. Its internal architecture includes an 8-bit instruction register, status register with BP0/BP1/WE/WPEN bits, and automatic address increment during sequential reads.
Write operations require explicit WREN instruction prior to WRITE or WRSR; self-timed internal write cycle completes in 5 ms typical. Block write protection covers top 1/4, 1/2, or full array (0000–3FFFh), and HOLD suspends ongoing transfers without resetting sequence state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 128 Kbit (16,384 × 8) - sufficient for bootloader config, calibration tables, or device identity storage in space-constrained designs |
| Supply Voltage Range | 1.8 V to 3.6 V - enables direct interfacing with 1.8 V/3.3 V microcontrollers without level-shifting |
| Max Clock Frequency | 3 MHz - supports high-throughput parameter updates while maintaining timing margin across temperature |
| Write Cycle Time | 5 ms typical - defines minimum interval between successive page writes; impacts firmware update latency |
| Endurance | 100,000 write cycles - ensures reliable operation over 10+ years in daily-configurable industrial equipment |
| Data Retention | >200 years - guarantees long-term integrity of stored calibration or security keys without refresh |
| ESD Protection | >4000 V HBM - provides robust handling during board assembly and field servicing |
Pinout & Package
AT25128N-10SC-1.8 is housed in an 8-pin EIAJ SOIC package (0.200" wide), compliant with JEDEC MS-012, with 1.27 mm pitch and 4.90 mm × 3.90 mm body dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-low enable; must be held low during entire SPI transaction; high impedance on SO when deasserted |
| 2 SCK | Serial Clock Input | Master-generated clock; timing-critical path; requires clean edge with ≤800 ns low/high times at 1.8 V |
| 3 SO | Serial Data Output | Tri-state output; driven only when CS active and read command issued; high-Z after CS high |
| 4 WP | Write Protect Input | Hardware lock for status register and protected memory blocks when WPEN=1 and WP=low |
| 5 HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting internal address counter; requires SCK low to assert |
| 6 GND | Ground Reference | Signal and power return; must be low-impedance connection to minimize noise coupling into SO/SI |
| 7 VCC | Power Supply | 1.8–3.6 V input; decoupling capacitor (0.1 µF) required within 5 mm of pin for stable read/write margins |
| 8 SI | Serial Data Input | Command/address/data input; sampled on SCK rising edge in Mode 0; setup/hold times tighten at 1.8 V |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Support | Interoperates with diverse MCUs including ARM Cortex-M, PIC, and MSP430 without protocol translation |
| 1.8 V Operation | Eliminates need for voltage translators in battery-powered or ultra-low-power systems |
| 64-byte Page Write | Reduces firmware update time by 64× vs. byte-write; minimizes host CPU overhead during bulk writes |
| Block Write Protection | Enables selective locking of critical sectors (e.g., calibration data) while allowing runtime updates to user parameters |
| HOLD Pin Functionality | Allows host MCU to service higher-priority interrupts mid-transfer without losing EEPROM state |
| WPEN Bit Control | Permits system-level write protection override via software, enabling secure factory programming sequences |
Applications
| Smart Energy Metering | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Storing tariff schedules, meter calibration coefficients, and tamper-event logs in ANSI C12.19-compliant utility meters. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed data integrity across 15+ year field life and frequent partial rewrites. Use Value: Eliminates external backup batteries; leverages 100K endurance and >200-year retention to meet ANSI/IEEE longevity requirements. |
Use Scenario: Holding module identification, channel scaling factors, and diagnostic history in DIN-rail mounted analog I/O cards. IC Role / Device Role / Timing Role: SPI-accessible parameter store synchronized to controller's cyclic scan, tolerant of brownout conditions. Use Value: 1.8 V operation allows direct connection to 3.3 V FPGA I/O banks; HOLD pin enables deterministic response during watchdog resets. |
| Medical Wearable Sensors | Automotive Body Control Units |
Use Scenario: Saving patient-specific thresholds, sensor offset corrections, and usage counters in FDA Class II wearable ECG monitors. IC Role / Device Role / Timing Role: Secure, low-power configuration memory accessed during boot and periodic calibration routines. Use Value: Hardware write protection (WP pin + BP bits) prevents accidental overwrite of clinical settings during firmware upgrades. |
Use Scenario: Storing seat position presets, mirror fold/unfold profiles, and lighting configuration in LIN-connected door modules. IC Role / Device Role / Timing Role: SPI EEPROM interfaced to 8-bit automotive MCU; withstands -40°C to +105°C ambient per AEC-Q100 stress testing. Use Value: Industrial temperature grade (-40°C to +85°C) and 4 kV ESD rating ensure reliability in harsh vehicle environments. |
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 | 128 Kbit SPI EEPROM, 2.5–5.5 V supply, 20 MHz max clock, SOIC-8 package | Higher speed and wider voltage range; lacks HOLD pin and 1.8 V support | Choose for systems requiring faster writes or 5 V compatibility, but verify absence of HOLD does not impact interrupt handling. |
| BR24G128FJ-WE2 | 128 Kbit I²C EEPROM, 1.7–5.5 V, 1 MHz max, 8-pin TSSOP | I²C interface instead of SPI; no WP/HOLD pins; different command set and timing | Select when board already uses I²C bus and pin count is constrained; avoid if SPI master resources are dedicated and timing-critical. |
Compared with M95128-WMN6TP and BR24G128FJ-WE2, AT25128N-10SC-1.8 uniquely delivers 1.8 V operation with HOLD functionality and SPI Mode 0/3 flexibility-critical for ultra-low-power, interrupt-resilient embedded control where voltage headroom and deterministic communication suspension matter.
Availability
AT25128N-10SC-1.8 is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, medical wearables, and automotive body electronics requiring stable component supply, long-life data retention, and industrial temperature compliance.
Supply support for AT25128N-10SC-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 (formerly Atmel) is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions for industrial, automotive, and consumer markets.
The AT25128N-10SC-1.8 belongs to the AT25xxx SPI EEPROM product line, designed specifically for low-voltage, high-reliability configuration storage in resource-constrained embedded systems where write endurance and data integrity are mission-critical.
FAQ
What is the maximum clock frequency supported by AT25128N-10SC-1.8?
The AT25128N-10SC-1.8 supports up to 3 MHz SCK frequency when operating at 1.8 V to 3.6 V. This value is specified in the AC Characteristics table under fSCK for the 1.8–3.6 V voltage range and reflects the maximum guaranteed timing margin across industrial temperature conditions.
Does AT25128N-10SC-1.8 support both SPI Mode 0 and Mode 3?
Yes, AT25128N-10SC-1.8 explicitly supports SPI Modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1), as confirmed in the Features section. This dual-mode capability ensures interoperability with a broad range of microcontroller SPI peripherals without requiring mode-specific firmware adaptation.
How does the HOLD pin function during an active SPI transaction in AT25128N-10SC-1.8?
In AT25128N-10SC-1.8, the HOLD pin suspends serial communication when pulled low while SCK is low, preserving the current address and instruction state. Communication resumes upon returning HOLD high while SCK remains low-no reinitialization or restart of the command sequence is needed, enabling deterministic interrupt handling.
What write protection mechanisms are implemented in AT25128N-10SC-1.8?
AT25128N-10SC-1.8 provides dual-layer write protection: hardware-based via the WP pin (when WPEN=1), and software-configurable block protection (BP0/BP1 bits) for top 1/4, 1/2, or full memory array. Both mechanisms prevent unintended writes to critical configuration sectors during power transitions or firmware errors.
Is AT25128N-10SC-1.8 rated for industrial temperature operation?
Yes, AT25128N-10SC-1.8 is qualified for industrial temperature range (-40°C to +85°C), as indicated by the "I" suffix in its ordering code family and confirmed in the Ordering Information table. This rating applies to all electrical and timing specifications under the 1.8–3.6 V supply condition.
AT25128N-10SC-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 2.1 MHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25128N-10SC-1.8 FAQ
1.How can I place an order for AT25128N-10SC-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25128N-10SC-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 AT25128N-10SC-1.8 reliable?
The price and inventory of AT25128N-10SC-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 AT25128N-10SC-1.8 is usually 5 days.
3.What payment methods are accepted for AT25128N-10SC-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25128N-10SC-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25128N-10SC-1.8?
AT25128N-10SC-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25128N-10SC-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 AT25128N-10SC-1.8?
For technical support, including AT25128N-10SC-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25128N-10SC-1.8 requirements.
6.How does Aetrix verify that AT25128N-10SC-1.8 is sourced from the original manufacturer or authorized distributors?
All AT25128N-10SC-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 AT25128N-10SC-1.8 meets industry standards.
7.What is the process for return or replacement of AT25128N-10SC-1.8?
All AT25128N-10SC-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT25128N-10SC-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 AT25128N-10SC-1.8 part is unused and in its original packaging.
Return procedure for AT25128N-10SC-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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