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Microchip Technology 25C080T-E/SN
- Part No.:
- 25C080T-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
25C080T-E/SN.pdf
- Description:
- IC EEPROM 8KBIT SPI 3MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,833
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Product details
Overview
25C080T-E/SN from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM designed for nonvolatile data storage in automotive and industrial control systems. It features 1024 × 8-bit organization, 16-byte page write capability, 3 MHz max clock frequency at 4.5–5.5 V, and operates across –40°C to +125°C. Its hardware write protection (WP pin), HOLD function, and block protection (BP0/BP1) support robust firmware parameter retention in engine control units and sensor calibration modules.
For engineers reviewing the 25C080T-E/SN datasheet, 25C080T-E/SN pinout, 25C080T-E/SN application, or 25C080T-E/SN equivalent, key selection criteria include its automotive-grade temperature range (–40°C to +125°C), SOIC-8 narrow (150 mil) package, 5 ms max internal write cycle time, and SPI interface compatibility with PIC and ARM-based microcontrollers requiring deterministic EEPROM access.
Technical Context
The 25C080T-E/SN implements a standard SPI Mode 0,0 (CPOL=0, CPHA=0) serial interface with separate SI (data in) and SO (data out) lines, CS-controlled device selection, and HOLD pin for transaction suspension without reset. Its internal architecture includes a status register with WIP, WEL, BP0/BP1, and WPEN bits, enabling programmable block write protection and hardware-level write disable via the WP pin when WPEN=1.
It uses self-timed erase/write cycles with no external timing components required, supports sequential read with automatic address increment, and enforces write enable latch (WREN/WRDI) protocol before any memory or status register modification - ensuring immunity to spurious writes during power transitions or noise events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8-bit), sufficient for storing bootloader configuration, calibration coefficients, or fault logs in ECUs. |
| Interface | SPI-compatible serial bus (Mode 0,0), compatible with standard MCU SPI peripherals without bit-banging overhead. |
| Max clock frequency | 3 MHz at VCC = 4.5–5.5 V, enabling ~384 kbps effective read throughput and fast parameter updates. |
| Write cycle time | 5 ms maximum internal write time per page or byte, deterministically bounding firmware update latency. |
| Temperature range | –40°C to +125°C (Automotive E grade), qualified for under-hood and transmission control module environments. |
| Endurance & retention | 1 million write/erase cycles and >200 years data retention, validated for long-life automotive deployment. |
| Supply voltage | 4.5 V to 5.5 V only - requires stable 5 V rail; not compatible with 3.3 V or mixed-voltage systems without level shifting. |
Pinout & Package
25C080T-E/SN is housed in an 8-lead plastic SOIC (SN) package, 150 mil body width, JEDEC MS-012 compliant, with gull-wing leads and 1.27 mm pitch. The package is RoHS-compliant and optimized for automated SMT assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable: drives device into active mode; high state places SO in high-impedance for multi-device SPI bus sharing. |
| SO (Pin 2) | Serial Data Output | Tri-state output delivering memory contents on falling edge of SCK; high-Z when CS high or HOLD asserted. |
| WP (Pin 3) | Write-Protect Input | Hardware lock: disables Status register writes when WP=low and WPEN=1; enables system-level firmware write lockdown. |
| VSS (Pin 4) | Ground Reference | Primary return path for all I/O and core logic; must be low-impedance connection to minimize noise coupling during write cycles. |
| SI (Pin 5) | Serial Data Input | Latches instructions, addresses, and data on rising edge of SCK; supports full-duplex SPI command framing. |
| SCK (Pin 6) | Serial Clock Input | Synchronizes all data transfers; rising edge clocks SI, falling edge updates SO; timing-critical for AC compliance. |
| HOLD (Pin 7) | Hold Input | Suspends ongoing SPI transaction (e.g., during MCU interrupt servicing) without losing state or requiring reinitialization. |
| VCC (Pin 8) | Supply Voltage | 4.5–5.5 V only; internal regulation ensures stable EEPROM operation across automotive battery transients. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive temperature grade | Qualified for –40°C to +125°C operation, meeting AEC-Q100 stress test requirements for engine bay applications. |
| Hardware write protection | WP pin + WPEN bit combination enables irreversible firmware parameter lockout, preventing accidental overwrites in field-deployed units. |
| Page write capability | 16-byte page buffer allows burst programming of calibration tables or configuration blocks with single CS assertion, reducing bus overhead. |
| HOLD functionality | Enables deterministic pause/resume of SPI transactions during high-priority MCU interrupts - critical for real-time control loop integrity. |
| Block protection granularity | BP0/BP1 bits allow selective write-protection of upper 1/4, 1/2, or full memory array, supporting secure boot loader + user data partitioning. |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
Use Scenario: Storing adaptive fuel trim values, misfire counters, and diagnostic trouble codes (DTCs) that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with deterministic 5 ms write latency and automotive-grade thermal reliability. Use Value: Enables closed-loop engine optimization over vehicle lifetime while surviving under-hood thermal cycling and vibration. |
Use Scenario: Retaining gear shift learning profiles, clutch wear compensation, and torque converter lock-up maps. IC Role / Device Role / Timing Role: SPI-accessible EEPROM interfacing directly with TCM's 5 V MCU, supporting real-time parameter updates during drive cycles. Use Value: Eliminates need for external voltage translation or buffering, reducing BOM cost and PCB footprint in space-constrained modules. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Industrial Motor Drive Controller |
Use Scenario: Saving lens calibration offsets, exposure settings, and firmware version metadata across power cycles. IC Role / Device Role / Timing Role: Low-power, high-reliability serial EEPROM accessed during camera boot sequence for sensor initialization. Use Value: Ensures consistent image quality and rapid startup by guaranteeing valid calibration data even after extended storage or thermal shock. |
Use Scenario: Storing motor tuning parameters (PID gains, current limits, encoder zero points) and runtime fault history logs. IC Role / Device Role / Timing Role: Robust nonvolatile storage interfaced to industrial-grade 5 V microcontroller with HOLD support for interrupt-safe updates. Use Value: Maintains operational continuity during factory commissioning and field maintenance without requiring system reboot or configuration reload. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25AA080T-I/SN | 1.8–5.5 V supply range; 1 MHz max clock; industrial temp only (–40°C to +85°C); lower VCC flexibility but wider voltage tolerance. | Not qualified for automotive under-hood use; suitable for consumer or industrial control where 5 V rail is unstable or shared with 3.3 V logic. | Select when system lacks regulated 5 V supply or requires broader input voltage margin at cost of speed and temperature rating. |
| 25LC080T-I/SN | 2.5–5.5 V supply; 2 MHz max clock; industrial temp only; higher speed than 25AA080 but lower than 25C080; no automotive qualification. | Applicable in 3.3 V embedded systems (e.g., PLC I/O modules) needing faster writes than 25AA080 but not requiring 125°C operation. | Choose for 3.3 V designs with moderate timing constraints and no automotive qualification requirement. |
Compared with 25AA080T-I/SN and 25LC080T-I/SN, the 25C080T-E/SN uniquely delivers automotive-grade temperature resilience, highest SPI clock rate (3 MHz), and strict 4.5–5.5 V operation - making it the sole choice for safety-critical, high-speed, under-hood EEPROM applications.
Availability
25C080T-E/SN is available at Aetrix Electronics and suitable for automotive engine management, transmission control, and ADAS camera calibration requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 25C080T-E/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 leading provider of microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 25C080T-E/SN belongs to Microchip's legacy 25XX080 SPI EEPROM family, engineered specifically for automotive and industrial systems demanding high reliability, deterministic write timing, and hardware-level data protection.
FAQ
What is the operating voltage range for the 25C080T-E/SN?
The 25C080T-E/SN operates strictly within 4.5 V to 5.5 V. Unlike the 25AA080 or 25LC080 variants, it does not support lower voltages such as 1.8 V or 2.5 V. This fixed 5 V range ensures compatibility with automotive 5 V MCU interfaces and simplifies power domain design, but requires dedicated 5 V regulation if the host system uses mixed-supply rails.
Does the 25C080T-E/SN support SPI Mode 0,0 only?
Yes, the 25C080T-E/SN implements SPI Mode 0,0 (CPOL = 0, CPHA = 0) exclusively. Data is sampled on the rising edge of SCK and output on the falling edge. It does not support Mode 1,1 or other SPI variants. This fixed mode ensures interoperability with Microchip PIC MCUs and most ARM Cortex-M SPI peripherals configured for standard Mode 0,0 operation.
How does the HOLD pin function during an active SPI transaction on the 25C080T-E/SN?
The HOLD pin on the 25C080T-E/SN suspends an ongoing SPI sequence when pulled low while SCK is low, placing SI, SO, and SCK in high-impedance states. Communication resumes from the exact point of suspension when HOLD is returned high with SCK still low. This behavior preserves transaction state across MCU interrupt handling - a key feature for real-time systems using the 25C080T-E/SN.
What memory protection mechanisms does the 25C080T-E/SN provide?
The 25C080T-E/SN provides three layers of memory protection: (1) software-controlled write enable latch (WREN/WRDI), (2) status register bits (BP0/BP1) for 0%, 25%, 50%, or 100% array block protection, and (3) hardware write protection via the WP pin when WPEN=1. These features collectively prevent unintended writes during power-up, noise events, or firmware errors - essential for automotive safety integrity.
Is the 25C080T-E/SN pin-compatible with other 25XX080 family members?
Yes, the 25C080T-E/SN shares identical 8-pin SOIC (SN) pinout and signal definitions with 25AA080T-I/SN and 25LC080T-I/SN. However, due to differing VCC ranges and temperature grades, direct substitution requires verification of supply voltage stability and thermal environment. The 25C080T-E/SN is not a drop-in replacement in non-automotive systems lacking 5 V regulation or exceeding +85°C ambient.
25C080T-E/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:
- 3 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
25C080T-E/SN FAQ
1.How can I place an order for 25C080T-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 25C080T-E/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 25C080T-E/SN reliable?
The price and inventory of 25C080T-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25C080T-E/SN is usually 5 days.
3.What payment methods are accepted for 25C080T-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25C080T-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25C080T-E/SN?
25C080T-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25C080T-E/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 25C080T-E/SN?
For technical support, including 25C080T-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25C080T-E/SN requirements.
6.How does Aetrix verify that 25C080T-E/SN is sourced from the original manufacturer or authorized distributors?
All 25C080T-E/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 25C080T-E/SN meets industry standards.
7.What is the process for return or replacement of 25C080T-E/SN?
All 25C080T-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 25C080T-E/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 25C080T-E/SN part is unused and in its original packaging.
Return procedure for 25C080T-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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