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Microchip Technology 25AA080T-I/SN
- Part No.:
- 25AA080T-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
25AA080T-I/SN.pdf
- Description:
- IC EEPROM 8KBIT SPI 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,090
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Product details
Overview
25AA080T-I/SN from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 1.8–5.5 V supply range, and industrial temperature rating (–40°C to +85°C). It features 16-byte page write capability, 5 ms max internal write cycle time, and hardware write protection via WP pin and Status register. It is used in embedded systems for nonvolatile storage of calibration data, configuration settings, and firmware parameters.
For engineers reviewing the 25AA080T-I/SN datasheet, 25AA080T-I/SN pinout, 25AA080T-I/SN application, or 25AA080T-I/SN equivalent, this page delivers verified electrical specs, SPI timing constraints, block protection behavior, HOLD/CS interaction logic, and real-world design implications for memory retention, endurance, and low-power operation in resource-constrained microcontroller interfaces.
Technical Context
The 25AA080T-I/SN implements a standard SPI Mode 0,0 interface with separate SI (data in) and SO (data out) lines, requiring CS, SCK, SI, SO, WP, HOLD, VCC, and VSS connections. Its internal architecture includes a status register with WIP, WEL, BP0/BP1, and WPEN bits controlling write enable state and 1/4–full array protection granularity.
It supports sequential read across address boundaries with automatic rollover at 03FFh, and enforces page-aligned writes (max 16 bytes per page). The HOLD pin suspends ongoing SPI transfers without resetting internal state, enabling interrupt servicing while preserving command context - a critical feature for real-time microcontroller coexistence.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8-bit), sufficient for small configuration tables or device ID storage in space-constrained designs |
| Supply voltage | 1.8–5.5 V - enables direct interfacing with 1.8 V, 3.3 V, and 5 V microcontrollers without level shifting |
| Max clock frequency | 1 MHz at VCC ≥ 4.5 V - defines maximum SPI throughput of ~125 kB/s for byte reads or page writes |
| Write endurance | 1 million erase/write cycles - supports frequent field updates such as logging or parameter tuning over product lifetime |
| Data retention | > 200 years at +25°C - ensures long-term reliability for unpowered archival storage in industrial equipment |
| Standby current | 500 nA typical - minimizes battery drain in always-on or energy-harvesting applications |
| Page size | 16 bytes - constrains write burst length and requires software alignment to avoid wraparound corruption |
Pinout & Package
25AA080T-I/SN is packaged in an 8-lead narrow SOIC (150 mil body), JEDEC MS-012 compliant, with 1.27 mm pitch and surface-mount footprint. Pin 1 is marked by a beveled corner or notch on the package top.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select input | Active-low enable: must be low for all SPI operations; high state places SO in high-Z and enters standby mode |
| SO (Pin 2) | Serial Output | Data output line synchronized to SCK falling edge; tri-stated when CS high or HOLD low |
| WP (Pin 3) | Write-Protect control | Hardware lock: disables Status register writes when WPEN=1 and WP=low; no effect if WPEN=0 |
| VSS (Pin 4) | Ground reference | Return path for all digital and internal charge-pump circuits; must be low-impedance for reliable write cycling |
| SI (Pin 5) | Serial Input | Data/command input latched on SCK rising edge; accepts instruction, address, and data bytes MSB-first |
| SCK (Pin 6) | Serial Clock input | Master-generated clock; rising edge clocks SI, falling edge updates SO; timing limits define max SPI speed |
| HOLD (Pin 7) | Communication suspend | Pauses active SPI sequence when pulled low during SCK low; resumes on rising edge of HOLD while SCK remains low |
| VCC (Pin 8) | Power supply | 1.8–5.5 V operating range; powers internal EEPROM array, logic, and HV generator for write/erase operations |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 1.8 V - eliminates need for external regulators in battery-powered IoT nodes |
| Hardware write protection | Configurable via WP pin + WPEN bit - prevents accidental firmware corruption during power transitions or noise events |
| Block protection granularity | Four selectable protection levels (none, 1/4, 1/2, full array) - enables secure partitioning of boot code vs. user data |
| Self-timed write cycles | No external timing required - internal oscillator manages erase/write; host polls WIP bit or waits fixed 5 ms |
| HOLD functionality | Preserves SPI state across MCU interrupts - avoids retransmission overhead and maintains deterministic latency |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offsets and gain coefficients in a pressure transducer module. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed once at power-up; SPI read occurs during initialization before analog signal conditioning begins. Use Value: Ensures measurement accuracy across temperature and aging without requiring recalibration; 200-year retention guarantees data integrity over equipment service life. |
Use Scenario: Holding patient-specific therapy parameters and device serial number in a portable infusion pump. IC Role / Device Role / Timing Role: Secure parameter storage with write-protection enabled after initial setup; WP pin tied low to prevent runtime modification. Use Value: Meets IEC 62304 safety requirements for immutable configuration; 1M-cycle endurance supports clinical reprogramming during maintenance. |
| Automotive Body Control Module | Smart Energy Meter Firmware Patch |
Use Scenario: Retaining door lock position history and lighting preferences in a BCM after ignition-off. IC Role / Device Role / Timing Role: Low-power EEPROM accessed via SPI during wake-up; standby current ≤500 nA extends battery backup duration. Use Value: Enables "last known state" recall without draining vehicle battery; industrial temp rating ensures operation in under-hood environments. |
Use Scenario: Storing delta patches for firmware updates in a utility meter deployed in remote substations. IC Role / Device Role / Timing Role: Page-write-capable memory storing compressed patch binaries; HOLD pin used to pause writes during RF transmission bursts. Use Value: Reduces OTA update time by enabling burst writes up to 16 bytes; 5 ms write cycle allows predictable scheduling within tight wireless duty cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI Serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25AA080T-I/MC | Same die, 8-lead DFN (2×3 mm) package instead of SOIC; lower profile and thermal resistance | Better suited for space-constrained PCBs where height or thermal dissipation matters more than hand-solderability | Select 25AA080T-I/MC for automated assembly in compact consumer electronics; retain 25AA080T-I/SN for legacy SOIC footprints or prototyping. |
| 25AA080T-I/MS | Same die, 8-lead TSSOP (4.4 mm width); 0.65 mm pitch, slightly smaller than SOIC but larger than DFN | Offers intermediate density between SOIC and DFN; compatible with finer-pitch reflow but less common in distributor stock | Choose 25AA080T-I/MS only if board layout already uses TSSOP footprints; otherwise prefer SOIC for broadest availability and ease of inspection. |
Compared with 25AA080T-I/MC and 25AA080T-I/MS, the 25AA080T-I/SN provides optimal balance of manufacturability, thermal performance, and global distributor stock - making it the preferred choice for industrial and medical designs requiring long-term supply stability and proven assembly yield.
Availability
25AA080T-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart energy meter firmware patch storage requiring stable component supply across multi-year production cycles.
Supply support for 25AA080T-I/SN 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory products, with a focus on embedded control and connectivity solutions.
The 25AA080T-I/SN belongs to Microchip's legacy SPI Serial EEPROM product line, designed for cost-sensitive, low-power, and high-reliability applications in industrial, medical, and automotive systems where long data retention and robust write protection are essential.
FAQ
What is the maximum SPI clock frequency supported by the 25AA080T-I/SN?
The 25AA080T-I/SN supports up to 1 MHz maximum clock frequency when VCC is 4.5–5.5 V. At lower voltages (2.5–4.5 V), max clock drops to 2 MHz for 25LC080 variants, but the 25AA080T-I/SN is rated strictly at 1 MHz across its full 1.8–5.5 V range. This limit ensures reliable sampling margins for SI and proper SO timing under worst-case process/voltage/temperature conditions.
How does the HOLD pin function during an active SPI transaction on the 25AA080T-I/SN?
When the HOLD pin is pulled low during an active SPI transaction on the 25AA080T-I/SN, the device pauses communication without resetting internal state - SI, SCK, and SO enter high-impedance, and subsequent input transitions are ignored except for CS. To resume, HOLD must be raised while SCK is low; otherwise, the next SCK edge will not restart the sequence. This preserves command context for deterministic interrupt handling.
Can the 25AA080T-I/SN be used with a 1.8 V microcontroller without level shifters?
Yes, the 25AA080T-I/SN operates natively from 1.8 V to 5.5 V and specifies VIH1 = 2.0 V minimum at VCC ≥ 2.7 V, and VIH2 = 0.7 × VCC at VCC < 2.7 V. At 1.8 V supply, VIH2 = 1.26 V, which is compatible with standard 1.8 V GPIO high-level outputs (~1.6–1.8 V). No level shifter is needed for direct connection to 1.8 V MCUs.
What happens if a page write exceeds 16 bytes on the 25AA080T-I/SN?
If a page write exceeds 16 bytes on the 25AA080T-I/SN, the internal address counter wraps around to the start of the same page (e.g., from address 0x03FF back to 0x03F0), overwriting previously written data in that page. The device does not auto-increment to the next page. Software must enforce 16-byte alignment and split writes across page boundaries to prevent unintended data loss.
Is the 25AA080T-I/SN recommended for new designs?
No - the official Microchip datasheet (DS21230E, page 1) states "Not recommended for new designs – Please use 25AA080A/B or 25LC080A/B." These newer variants offer enhanced ESD protection, tighter AC timing, and improved write reliability. However, the 25AA080T-I/SN remains fully supported for existing designs and legacy production continuity.
25AA080T-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 1 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-SOIC
25AA080T-I/SN FAQ
1.How can I place an order for 25AA080T-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 25AA080T-I/SN 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 25AA080T-I/SN reliable?
The price and inventory of 25AA080T-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25AA080T-I/SN is usually 5 days.
3.What payment methods are accepted for 25AA080T-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25AA080T-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25AA080T-I/SN?
25AA080T-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25AA080T-I/SN 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 25AA080T-I/SN?
For technical support, including 25AA080T-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25AA080T-I/SN requirements.
6.How does Aetrix verify that 25AA080T-I/SN is sourced from the original manufacturer or authorized distributors?
All 25AA080T-I/SN 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 25AA080T-I/SN meets industry standards.
7.What is the process for return or replacement of 25AA080T-I/SN?
All 25AA080T-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 25AA080T-I/SN, 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 25AA080T-I/SN part is unused and in its original packaging.
Return procedure for 25AA080T-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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