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Microchip Technology 25AA080CT-I/MS
- Part No.:
- 25AA080CT-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
25AA080CT-I/MS.pdf
- Description:
- IC EEPROM 8KBIT SPI 10MHZ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,877
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Product details
Overview
25AA080CT-I/MS from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 16-byte page size, and 1.8–5.5 V supply range. It features 10 MHz max clock speed, 5 µA standby current at 5.5 V, and industrial temperature operation (−40°C to +85°C), used for nonvolatile parameter storage in microcontroller-based embedded systems.
For engineers reviewing the 25AA080CT-I/MS datasheet, 25AA080CT-I/MS pinout, 25AA080CT-I/MS application, or 25AA080CT-I/MS equivalent, key selection criteria include SPI interface compatibility, low-voltage operation down to 1.8 V, hardware write protection via WP pin, HOLD functionality for interrupt-safe bus sharing, and MSOP-8 packaging for space-constrained PCB layouts.
Technical Context
The 25AA080CT-I/MS implements a standard SPI Mode 0,0 (CPOL = 0, CPHA = 0) interface with separate SI and SO lines, supporting byte and page writes up to 16 bytes per page. Its internal architecture includes a write-enable latch, STATUS register with WIP/WEL/BP bits, and hardware block protection configurable for 0%, 25%, 50%, or 100% array coverage.
It uses CMOS EEPROM technology with self-timed 5 ms max write cycles, >1 million erase/write endurance, and >200-year data retention. The HOLD pin suspends ongoing serial transfers without resetting the sequence, enabling host MCU interrupt servicing while preserving transaction state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8-bit), sufficient for firmware configuration, calibration data, or device identity storage in resource-limited systems. |
| Interface | SPI-compatible serial bus (Mode 0,0), requiring only CS, SCK, SI, SO, WP, and HOLD - no parallel bus overhead or address decoding logic. |
| Supply Voltage | 1.8–5.5 V, enabling direct integration with 1.8 V, 3.3 V, and 5 V microcontrollers without level-shifting circuitry. |
| Max Clock Frequency | 10 MHz at VCC ≥ 4.5 V, delivering up to 1.25 MB/s effective read throughput for rapid parameter loading. |
| Page Size | 16 bytes, defining maximum contiguous write length before internal write cycle initiation - critical for optimizing write latency in logging applications. |
| Write Cycle Time | ≤5 ms (self-timed), eliminating need for external timing control or polling delay estimation in firmware. |
| Endurance & Retention | >1 million erase/write cycles and >200 years data retention, validated for long-life industrial deployments with infrequent but critical updates. |
Pinout & Package
25AA080CT-I/MS is housed in an 8-lead MSOP package (3.0 mm × 4.4 mm, 0.65 mm pitch), optimized for high-density PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable: pulls device into active mode; rising edge after write sequence triggers internal write cycle; high-Z SO when deselected enables multi-device SPI bus sharing. |
| SO (Pin 2) | Serial Data Output | Tri-state output driven on falling SCK edge; high-impedance during HOLD or CS high - eliminates bus contention in shared SPI configurations. |
| WP (Pin 3) | Hardware Write-Protect Input | Low-active pin that, when enabled via STATUS register WPEN bit, blocks writes to nonvolatile STATUS bits - provides tamper-resistant configuration lock. |
| VSS (Pin 4) | Ground Reference | Primary return path for all I/O and core logic; must be low-impedance connection to minimize noise coupling into sensitive EEPROM read/write operations. |
| SI (Pin 5) | Serial Data Input | Latches instruction, address, and data on rising SCK edge; supports MSB-first protocol alignment with PIC® and other SPI masters without bit-reversal firmware overhead. |
| SCK (Pin 6) | Serial Clock Input | Synchronizes all data transfers; requires clean edge monotonicity (≤2 µs rise/fall time) to meet setup/hold timing across full voltage/temperature range. |
| HOLD (Pin 7) | Bus Hold Control | Pauses active SPI transaction when pulled low (with SCK low); preserves internal state during MCU interrupt handling - avoids retransmission and timing-critical restart logic. |
| VCC (Pin 8) | Power Supply | 1.8–5.5 V operating range; internal regulation ensures stable core voltage; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin for reliable write margin. |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte page write capability | Reduces average write latency by batching up to 16 bytes per 5 ms internal cycle - cuts firmware overhead vs. single-byte writes by >90% in configuration update routines. |
| Hardware + software write protection | Combines WP pin (physical lock) with BP0/BP1 bits (logical partitioning) to enforce granular, persistent protection of calibration or security-critical memory regions. |
| HOLD pin with state retention | Enables deterministic pause/resume of SPI transactions during high-priority MCU interrupts - eliminates race conditions and transaction loss in real-time control loops. |
| 1.8 V minimum supply operation | Supports direct interfacing with ultra-low-power MCUs (e.g., PIC16LF, SAM L21) without external regulators or level shifters - simplifies power architecture and reduces BOM count. |
| Industrial temperature grade (−40°C to +85°C) | Validated for deployment in extended ambient environments including factory automation controllers, HVAC systems, and outdoor metering equipment. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and linearization tables in programmable pressure or temperature transmitters. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up initialization and runtime correction; SPI read occurs once per measurement cycle. Use Value: Enables field-replaceable sensor modules with unique calibration data retained across power cycles and firmware updates - eliminating manual recalibration labor. |
Use Scenario: Holding user-selectable therapy parameters (e.g., infusion rate, alarm thresholds) and device serial/traceability data in portable insulin pumps or nebulizers. IC Role / Device Role / Timing Role: Secure, low-power configuration store updated infrequently via USB-hosted GUI; write-protected via WP pin during normal operation. Use Value: Ensures regulatory-compliant data persistence and tamper resistance - meets IEC 62304 requirements for Class II medical device configuration integrity. |
| Smart Energy Meter Firmware Settings | Automotive Body Control Module Logs |
|
Use Scenario: Recording tariff schedules, demand-response event flags, and utility-defined billing parameters in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: SPI EEPROM interfaced to metering SoC; accessed via dedicated low-priority DMA channel during idle periods to avoid real-time sampling disruption. Use Value: Provides certified, long-retention storage for revenue-critical settings - withstands >1M write cycles over 20-year meter lifetime with <1 ppm data corruption risk. |
Use Scenario: Logging door lock/unlock events, window position history, and fault codes in automotive BCMs for diagnostic traceability and warranty analysis. IC Role / Device Role / Timing Role: Low-voltage (1.8 V) EEPROM co-located with CAN transceiver; writes triggered by CAN message ACK with HOLD asserted during CAN arbitration. Use Value: Survives cold-cranking voltage dips (down to 1.8 V) and retains crash-event logs even after battery disconnect - supports ISO 16750-2 compliance testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25LC080CT-I/MS | Same 8 Kbit capacity and MSOP-8 package, but requires 2.5–5.5 V supply and offers 32-byte page size. | Better suited for 3.3 V/5 V systems needing larger page writes; not compatible in 1.8 V designs or where strict 16-byte page boundaries are enforced in firmware. | Select when higher voltage margin and larger page efficiency outweigh low-voltage operation needs. |
| AT25080B-MAHL-T | 8 Kbit SPI EEPROM in 8-lead MSOP; supports 1.8–5.5 V, but rated for −40°C to +125°C and features 32-byte pages. | Valid for automotive under-hood use; lacks HOLD pin - requires software-managed transaction restart on interrupt, increasing firmware complexity. | Choose for AEC-Q100-compliant designs requiring extended temperature range, accepting trade-off of missing HOLD functionality. |
Compared with 25AA080CT-I/MS, 25LC080CT-I/MS trades 1.8 V operation for larger page size and higher voltage floor, while AT25080B-MAHL-T adds automotive temp range but removes HOLD - making 25AA080CT-I/MS optimal for industrial 1.8 V systems requiring deterministic interrupt handling.
Availability
25AA080CT-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, smart energy meter firmware settings, and automotive body control module logs requiring stable component supply across multi-year production cycles.
Supply support for 25AA080CT-I/MS 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 Inc. is a leading provider of microcontroller, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 25AA080CT-I/MS belongs to Microchip's 25XX080 family of SPI Serial EEPROMs, designed specifically for reliable, low-power nonvolatile data storage in cost-sensitive, space-constrained embedded systems across industrial, medical, and consumer applications.
FAQ
What is the minimum supply voltage required for reliable operation of the 25AA080CT-I/MS?
The 25AA080CT-I/MS operates reliably from 1.8 V to 5.5 V. At 1.8 V, it maintains full functionality including 5 MHz max clock speed, 16-byte page writes, and HOLD pin operation - verified across the full industrial temperature range (−40°C to +85°C). This enables direct interfacing with ultra-low-power microcontrollers without voltage translation.
Does the 25AA080CT-I/MS support hardware write protection, and how is it configured?
Yes, the 25AA080CT-I/MS supports hardware write protection via the WP pin combined with the WPEN bit in its STATUS register. When WP is low and WPEN is set high, writes to nonvolatile STATUS bits (BP0/BP1/WPEN) are blocked. The WP pin remains inactive until WPEN is programmed, allowing safe installation in systems with grounded WP pins.
How does the HOLD pin function during an active SPI transaction in the 25AA080CT-I/MS?
The HOLD pin on the 25AA080CT-I/MS pauses an ongoing SPI transaction when pulled low while SCK is low. During HOLD, SI, SCK, and SO enter high-impedance states and all inputs except CS are ignored. Resuming requires bringing HOLD high while SCK is low - the device continues exactly where it left off, preserving address pointer and internal state without reinitialization.
What is the page size of the 25AA080CT-I/MS, and why does it matter for firmware design?
The 25AA080CT-I/MS has a fixed 16-byte page size. This defines the maximum number of bytes that can be written in a single page-write command before triggering an internal 5 ms write cycle. Firmware must align writes to page boundaries and avoid crossing them - otherwise data wraps to the start of the same page, risking unintended overwrites of prior data.
Is the 25AA080CT-I/MS RoHS compliant and Pb-free?
Yes, the 25AA080CT-I/MS is fully RoHS compliant and Pb-free, meeting JEDEC standards for matte tin (Sn) finish. The MSOP-8 package carries the "3e" Pb-free marking per Microchip's packaging specification, and all manufacturing processes comply with EU Directive 2011/65/EU and related amendments.
25AA080CT-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 10 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-MSOP
25AA080CT-I/MS FAQ
1.How can I place an order for 25AA080CT-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 25AA080CT-I/MS 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 25AA080CT-I/MS reliable?
The price and inventory of 25AA080CT-I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25AA080CT-I/MS is usually 5 days.
3.What payment methods are accepted for 25AA080CT-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25AA080CT-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25AA080CT-I/MS?
25AA080CT-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25AA080CT-I/MS 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 25AA080CT-I/MS?
For technical support, including 25AA080CT-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25AA080CT-I/MS requirements.
6.How does Aetrix verify that 25AA080CT-I/MS is sourced from the original manufacturer or authorized distributors?
All 25AA080CT-I/MS 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 25AA080CT-I/MS meets industry standards.
7.What is the process for return or replacement of 25AA080CT-I/MS?
All 25AA080CT-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 25AA080CT-I/MS, 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 25AA080CT-I/MS part is unused and in its original packaging.
Return procedure for 25AA080CT-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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