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Microchip Technology 25LC080CT-I/ST
- Part No.:
- 25LC080CT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
25LC080CT-I/ST.pdf
- Description:
- IC EEPROM 8KBIT SPI 10MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,463
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Product details
Overview
25LC080CT-I/ST from Microchip Technology is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 16-byte page size, and industrial temperature range (−40°C to +85°C). It operates from 2.5V to 5.5V, supports up to 10 MHz clock frequency, and features hardware write protection via WP pin and STATUS register control. It is used for nonvolatile parameter storage in microcontroller-based embedded systems requiring reliable, low-power data retention.
For engineers reviewing the 25LC080CT-I/ST datasheet, 25LC080CT-I/ST pinout, 25LC080CT-I/ST application, or 25LC080CT-I/ST equivalent, key selection criteria include SPI interface compatibility, 16-byte page write capability, −40°C to +85°C operation, TSSOP-8 package footprint, and hardware/software write-protection flexibility.
Technical Context
The 25LC080CT-I/ST implements a standard SPI Mode 0,0 (CPOL = 0, CPHA = 0) interface with separate SI (MOSI) and SO (MISO) lines, CS-controlled selection, and HOLD pin for transaction suspension. Its internal architecture includes a 1024-byte EEPROM array, page latches, HV generator for programming, and status register with WIP, WEL, BP0/BP1, and WPEN bits.
Write operations require explicit WREN instruction followed by WRITE command and address/data; page writes are limited to 16 bytes within a single physical page (000h–00Fh, 010h–01Fh, etc.). Block protection can disable writes to none, upper 1/4 (0300h–03FFh), upper 1/2 (0200h–03FFh), or all memory via BP0/BP1 configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8-bit); provides sufficient space for firmware calibration data, device ID, or configuration registers in resource-constrained systems. |
| Interface | SPI-compatible serial bus (Mode 0,0); requires only CS, SCK, SI, SO - minimal GPIO usage on host MCU. |
| Max Clock Frequency | 10 MHz at VCC ≥ 4.5V; enables fast read/write cycles (e.g., ~800 ns per byte at max speed) without demanding high-speed PCB layout. |
| Page Size | 16 bytes; limits burst writes to aligned boundaries - software must manage address wrapping to avoid unintended overwrites. |
| Write Cycle Time | ≤5 ms typical; defines minimum delay before polling WIP bit or initiating next command - impacts real-time system responsiveness. |
| Endurance & Retention | >1 million erase/write cycles; >200 years data retention at 25°C - suitable for long-life industrial deployments with infrequent updates. |
| Supply Voltage | 2.5V to 5.5V; compatible with both 3.3V and 5V logic domains without level-shifting circuitry. |
| Temp Range | Industrial: −40°C to +85°C; validated across full range - supports operation in automotive under-hood, industrial PLC, and outdoor equipment environments. |
Pinout & Package
25LC080CT-I/ST is housed in an 8-lead TSSOP package (4.4 mm body width, 3.0 mm length, 0.65 mm pitch), RoHS-compliant and Pb-free. Pin 1 is marked with a dot or beveled corner; package fits standard 0.65 mm pitch TSSOP footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable; must be held low during entire SPI transaction; rising edge after valid write sequence triggers internal 5 ms write cycle. |
| SO (Pin 2) | Serial Output | MISO line; outputs data on falling edge of SCK; tri-states when CS high or HOLD low - enables multi-device SPI bus sharing. |
| WP (Pin 3) | Hardware Write-Protect | Low-active pin; blocks STATUS register writes only when WPEN bit = 1 - allows selective protection while permitting memory reads and unblocked writes. |
| 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 SPI signaling. |
| SI (Pin 5) | Serial Input | MOSI line; latches instruction/address/data on rising edge of SCK; requires clean setup/hold timing per AC specs (e.g., 10–30 ns depending on VCC). |
| SCK (Pin 6) | Serial Clock Input | Master-generated clock; defines timing for all data transfers; rise/fall times ≤2 µs required to meet AC timing margins. |
| HOLD (Pin 7) | Transaction Pause Control | Active-low; suspends ongoing SPI transfer without resetting state - permits MCU to service higher-priority interrupts then resume seamlessly. |
| VCC (Pin 8) | Power Supply | 2.5V–5.5V operating range; decoupling capacitor (0.1 µF ceramic) required near pin to suppress supply transients during write cycles. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed write cycle | Internal 5 ms erase/write completes autonomously - eliminates need for precise software timing delays or external timers. |
| Block write protection | Configurable via BP0/BP1 bits to protect none, upper 1/4, upper 1/2, or full array - prevents accidental corruption of critical firmware or calibration data. |
| Built-in power-on write protection | Write enable latch resets at power-up; WREN instruction required before any write - prevents spurious writes during brown-out or reset conditions. |
| HOLD pin support | Pauses SPI communication mid-sequence with no data loss - enables deterministic interrupt handling in real-time MCU applications. |
| High reliability | 1M+ endurance cycles and 200+ year data retention - validated for use in safety-critical or maintenance-free industrial systems. |
| Pb-free & RoHS compliant | Meets global environmental regulations; TSSOP-8 package uses matte tin lead finish - compatible with standard lead-free reflow profiles. |
Applications
| Industrial Sensor Calibration Storage | Embedded System Configuration Memory |
|---|---|
|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed at boot via SPI; retains values across power cycles and field reprogramming. Use Value: Enables plug-and-play sensor replacement without manual recalibration; leverages 16-byte page writes to update multi-parameter sets atomically. |
Use Scenario: Holding user-configurable settings (network IP, display brightness, alarm thresholds) in medical diagnostic devices. IC Role / Device Role / Timing Role: SPI-connected configuration EEPROM; read at startup and written during UI-driven setup routines. Use Value: Provides robust, low-power storage independent of main MCU flash wear; WP pin prevents accidental overwrite during firmware updates. |
| Automotive Body Control Module NVM | Consumer Appliance Event Logging |
|
Use Scenario: Recording door lock actuation history and seat position presets in 12V automotive body control units. IC Role / Device Role / Timing Role: Industrial-temp EEPROM interfaced to 3.3V MCU; withstands load-dump transients via internal voltage regulation. Use Value: Meets AEC-Q100 stress requirements indirectly via −40°C to +85°C rating and 2.5V–5.5V VCC range; 1M-cycle endurance supports 10+ year vehicle life. |
Use Scenario: Logging error codes and runtime hours in smart home appliances (e.g., washing machines, HVAC controllers). IC Role / Device Role / Timing Role: Low-cost, low-pin-count NVM for infrequent write logging; accessed only during fault events or maintenance mode. Use Value: 5 µA standby current extends battery backup life; sequential read simplifies firmware implementation for circular log buffer management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25LC080DT-I/ST | 32-byte page size; identical pinout, voltage, temp, and timing specs. | Supports larger burst writes - beneficial where firmware updates or bulk parameter sets exceed 16 bytes. | Select when application requires >16-byte atomic writes; verify address alignment logic handles 32-byte boundaries. |
| AT25080B-SSHL-T | Same 8 Kbit size, TSSOP-8, −40°C to +85°C; 20 MHz max clock; 64-byte page; different STATUS register map. | Higher speed and larger page improve throughput but require updated driver code for status polling and protection bits. | Choose for performance-critical designs needing faster access; validate WPEN/WP interaction and block protection behavior against Microchip's implementation. |
Compared with 25LC080DT-I/ST, the 25LC080CT-I/ST offers tighter page granularity for smaller updates; versus AT25080B-SSHL-T, it provides simpler status register handling and proven interoperability with Microchip MCU ecosystems, at the cost of lower max clock rate and smaller page buffer.
Availability
25LC080CT-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded configuration storage, and automotive body control applications requiring stable component supply and long-term lifecycle support.
Supply support for 25LC080CT-I/ST 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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 25LC080C/D family was designed for cost-sensitive, low-power embedded systems needing reliable SPI EEPROM with flexible write protection and industrial-grade temperature operation.
FAQ
What is the maximum clock frequency supported by the 25LC080CT-I/ST?
The 25LC080CT-I/ST supports up to 10 MHz clock frequency when VCC is 4.5V to 5.5V. At 2.5V to <4.5V, the maximum is 5 MHz; below 2.5V, it drops to 3 MHz. These limits ensure reliable setup/hold timing for SI and SO signals across voltage and temperature ranges - critical for deterministic SPI communication in industrial environments.
Does the 25LC080CT-I/ST require external pull-up resistors on its SPI lines?
The 25LC080CT-I/ST does not require external pull-ups on SI, SO, or SCK - these pins are actively driven. However, CS and HOLD should be pulled high with 10 kΩ resistors to ensure defined inactive states during power-up or MCU reset. WP may also benefit from a pull-up if hardware protection is not always desired.
How does the HOLD function work on the 25LC080CT-I/ST during an active SPI transaction?
When HOLD is pulled low while SCK is low, the 25LC080CT-I/ST pauses the current SPI sequence: SI, SCK, and SO enter high-impedance, and internal state is preserved. Resuming requires bringing HOLD high while SCK remains low - the device then continues from the exact bit position where it paused, enabling deterministic interrupt servicing without retransmission overhead.
Can the 25LC080CT-I/ST be used in a 3.3V-only system without level shifters?
Yes - the 25LC080CT-I/ST operates natively from 2.5V to 5.5V, with VIH1 = 0.7×VCC and VIL1 = 0.3×VCC. At VCC = 3.3V, it accepts 2.31V as high and 0.99V as low, fully compatible with standard 3.3V CMOS logic levels. No level shifting is needed for direct interfacing with 3.3V MCUs.
What happens if a page write crosses a 16-byte boundary on the 25LC080CT-I/ST?
If a page write command attempts to cross a 16-byte boundary (e.g., writing 20 bytes starting at address 0x00F0), the 25LC080CT-I/ST wraps the excess bytes back to the start of the same page (0x00F0 → 0x00FF, then 0x00F0 again), overwriting previously written data. Software must enforce page-aligned writes or split multi-page operations manually.
25LC080CT-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
25LC080CT-I/ST FAQ
1.How can I place an order for 25LC080CT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 25LC080CT-I/ST 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 25LC080CT-I/ST reliable?
The price and inventory of 25LC080CT-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25LC080CT-I/ST is usually 5 days.
3.What payment methods are accepted for 25LC080CT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25LC080CT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25LC080CT-I/ST?
25LC080CT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25LC080CT-I/ST 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 25LC080CT-I/ST?
For technical support, including 25LC080CT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25LC080CT-I/ST requirements.
6.How does Aetrix verify that 25LC080CT-I/ST is sourced from the original manufacturer or authorized distributors?
All 25LC080CT-I/ST 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 25LC080CT-I/ST meets industry standards.
7.What is the process for return or replacement of 25LC080CT-I/ST?
All 25LC080CT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 25LC080CT-I/ST, 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 25LC080CT-I/ST part is unused and in its original packaging.
Return procedure for 25LC080CT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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