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Microchip Technology 25LC080A-E/ST
- Part No.:
- 25LC080A-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
25LC080A-E/ST.pdf
- Description:
- IC EEPROM 8KBIT SPI 10MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,283
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Product details
Overview
25LC080A-E/ST from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 16-byte page size, 10 MHz max clock, and industrial-temperature operation (−40°C to +85°C). It features hardware write protection via WP pin, HOLD suspend functionality, and block-level array protection for embedded microcontroller data logging and configuration storage.
For engineers reviewing the 25LC080A-E/ST datasheet, 25LC080A-E/ST pinout, 25LC080A-E/ST application, or 25LC080A-E/ST equivalent, this page delivers verified electrical specs, package mapping to TSSOP-8, functional timing behavior, and real-world use context for reliable system integration.
Technical Context
The 25LC080A-E/ST implements a standard SPI Mode 0,0/Master-Slave interface with separate SI (data in) and SO (data out) lines, requiring CS, SCK, and HOLD control. Its internal architecture includes a write-enable latch, status register with WIP/WEL/BP bits, and page latches enabling 16-byte burst writes within aligned physical pages.
It supports sequential read with automatic address increment, self-timed erase/write cycles (≤5 ms), and dual-layer write protection: software-controlled via WREN/WRSR and hardware-enforced when WP is low and WPEN=1. Power-on defaults disable writes and place SO in high-impedance state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8-bit), sufficient for firmware parameter tables or calibration data in resource-constrained systems |
| Interface | SPI-compatible serial bus (Mode 0,0), compatible with PIC® and most MCU SPI peripherals without protocol translation |
| Page Size | 16 bytes - defines maximum contiguous write length before wraparound; requires software boundary checking |
| Max Clock Frequency | 10 MHz at VCC ≥ 4.5V - enables fast read/write throughput up to 1.25 MB/s theoretical peak |
| Write Cycle Time | ≤5 ms - determines minimum interval between write commands; impacts real-time logging latency |
| Endurance | 1,000,000 erase/write cycles - supports >10 years of daily 274-write operations in field-deployed devices |
| Data Retention | >200 years at +25°C - ensures long-term reliability for infrequently updated configuration storage |
| VCC Range | 2.5–5.5 V - interoperable with 3.3 V and 5 V logic domains without level shifting |
Pinout & Package
25LC080A-E/ST is packaged in an 8-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm pitch, 4.4 mm body width, and Pb-free/RoHS-compliant construction per Microchip Drawing C04-086B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable; must go high after final data bit to initiate internal write cycle; deselects device and places SO in high-Z |
| SO (Pin 2) | Serial Data Output | Tri-state output; data shifted out on falling edge of SCK; high-impedance when CS high or HOLD low |
| WP (Pin 3) | Write-Protect Pin | Hardware lock for Status Register writes when WPEN=1; no effect on memory writes unless enabled in SR |
| VSS (Pin 4) | Ground Reference | Primary return path for all I/O and core circuitry; must be low-impedance connection to system GND plane |
| SI (Pin 5) | Serial Data Input | Accepts instruction, address, and data; sampled on rising edge of SCK; ignored during HOLD assertion |
| SCK (Pin 6) | Serial Clock Input | Synchronizes all SPI transfers; rising edge latches SI, falling edge updates SO; must be low before HOLD deassertion |
| HOLD (Pin 7) | Hold Input | Pauses ongoing SPI sequence without reset; requires low-to-high transition while SCK is low to resume |
| VCC (Pin 8) | Supply Voltage | Power input for core and I/O; decoupling capacitor (0.1 µF) required near pin for noise immunity during write cycles |
Key Features
| Feature | Design Value |
|---|---|
| Block Write Protection | Selectively locks 0%, 25%, 50%, or 100% of memory array via BP0/BP1 bits - prevents accidental overwrite of critical boot or calibration sectors |
| Self-Timed Write Cycles | No external timing control needed; internal oscillator manages 5 ms erase/write - simplifies host firmware and eliminates timeout polling overhead |
| HOLD Functionality | Halts SPI communication mid-sequence without losing state - enables MCU to service higher-priority interrupts then resume transparently |
| Power-On Write Disable | WEL bit resets at power-up; requires explicit WREN command before any write - prevents corruption during brown-out or startup transients |
| ESD Robustness | 4 kV HBM rating on all pins - withstands handling and board-level ESD events without latch-up or parametric shift |
| Low Standby Current | 1 µA at 2.5 V - extends battery life in always-on sensor nodes or backup power applications |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module Calibration |
|---|---|
Use Scenario: Storing I/O mapping, scaling factors, and fault thresholds in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed via SPI during boot and runtime reconfiguration; tolerates wide temperature swings and electrical noise. Use Value: Enables field-upgradable settings without firmware reflashing; 200-year retention ensures decades of unattended operation in sealed enclosures. | Use Scenario: Holding seat position offsets, mirror angle presets, and lighting profiles in automotive BCMs across vehicle lifecycles. IC Role / Device Role / Timing Role: SPI-connected parameter store synchronized with CAN message reception; write-protected upper quarter prevents overwriting factory defaults. Use Value: Supports OEM personalization and dealership reprogramming while preserving safety-critical calibration data under 125°C ambient conditions. |
| Medical Infusion Pump Parameter Tables | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Archiving drug library metadata, dose limits, and alarm thresholds in Class II medical devices requiring regulatory traceability. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory partition accessed only by authenticated firmware; WP pin hardwired to prevent runtime modification. Use Value: Meets IEC 62304 data integrity requirements; 1M-cycle endurance supports >10,000 recalibrations over product lifetime. | Use Scenario: Storing signed firmware patches and cryptographic keys in utility-grade meters deployed in remote substations. IC Role / Device Role / Timing Role: Isolated SPI slave holding update payloads; block protection prevents partial writes during grid voltage sags or RF interference. Use Value: Ensures atomic patch application with built-in write-cycle completion detection via RDSR/WIP polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25AA080A-E/ST | 1.8–5.5 V supply range vs. 2.5–5.5 V; identical pinout, timing, and feature set | Supports lower-voltage microcontrollers (e.g., 1.8 V ARM Cortex-M0+); same TSSOP-8 footprint | Select when system VCC may drop below 2.5 V or when interfacing with ultra-low-power MCUs |
| AT25080B-SSHL-T | 32-byte page size; 20 MHz max clock; different status register layout and WPEN implementation | Higher throughput per write cycle but requires page-boundary management changes; not drop-in compatible | Choose for bandwidth-sensitive designs where larger page size reduces transaction count, accepting firmware adaptation |
Compared with 25LC080A-E/ST, 25AA080A-E/ST offers broader voltage compatibility without layout change, while AT25080B-SSHL-T trades pin compatibility for faster writes and larger pages-requiring validation of status register interaction and hold-time margins.
Availability
25LC080A-E/ST is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device manufacturing requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 25LC080A-E/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 microcontroller, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing infrastructure.
The 25LC080A-E/ST belongs to Microchip's 25XX080A/B family of SPI Serial EEPROMs, engineered for robust nonvolatile data storage in cost-sensitive, space-constrained embedded systems with demanding reliability requirements.
FAQ
What is the maximum clock frequency supported by the 25LC080A-E/ST?
The 25LC080A-E/ST supports up to 10 MHz clock frequency when VCC is 4.5–5.5 V, 5 MHz at 2.5–4.5 V, and 3 MHz at 1.8–2.5 V. These values are specified in Table 1-2 of DS21808D and define the upper limit for reliable SPI communication speed in each voltage range. The 25LC080A-E/ST must operate within these AC timing constraints to ensure data integrity during reads and writes.
Does the 25LC080A-E/ST require external pull-up resistors on its SPI lines?
The 25LC080A-E/ST does not require external pull-ups on SI, SO, or SCK - these pins are actively driven. However, CS and WP should be pulled high externally (typically 4.7 kΩ to VCC) to ensure defined logic states during power-up and idle periods. The 25LC080A-E/ST datasheet specifies that CS must be high to enter standby mode and WP high to allow Status Register writes unless WPEN is cleared.
How does page write operation work in the 25LC080A-E/ST?
A page write in the 25LC080A-E/ST allows up to 16 consecutive bytes to be loaded into the page buffer before triggering an internal write cycle. All bytes must reside within the same 16-byte physical page boundary (e.g., addresses 0x000–0x00F); crossing boundaries causes wraparound within the current page. The 25LC080A-E/ST completes the actual write only after CS goes high following the last data bit, initiating the self-timed ≤5 ms cycle.
Can the 25LC080A-E/ST be used in automotive applications requiring −40°C to +125°C operation?
No - the 25LC080A-E/ST is rated for Industrial temperature range (−40°C to +85°C), not Automotive (−40°C to +125°C). The 'E' suffix in the part number denotes the temperature grade, but the 25LC080A-E/ST variant is specifically qualified to Industrial spec. For +125°C operation, Microchip offers the 25LC080B-E/ST (32-byte page) or automotive-grade alternatives like the 25LC080AT-I/ST, which must be verified against DS21808D revision history and qualification reports.
What happens to the 25LC080A-E/ST during a power interruption while writing?
The 25LC080A-E/ST incorporates built-in power-on/off data protection: the write enable latch resets on power loss, and incomplete writes are aborted. No partial or corrupted data is committed to memory. After recovery, the 25LC080A-E/ST resumes normal operation in standby mode with SO in high-impedance state. System firmware must verify write completion via RDSR/WIP polling before assuming data persistence.
25LC080A-E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
25LC080A-E/ST FAQ
1.How can I place an order for 25LC080A-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 25LC080A-E/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 25LC080A-E/ST reliable?
The price and inventory of 25LC080A-E/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25LC080A-E/ST is usually 5 days.
3.What payment methods are accepted for 25LC080A-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25LC080A-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25LC080A-E/ST?
25LC080A-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25LC080A-E/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 25LC080A-E/ST?
For technical support, including 25LC080A-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25LC080A-E/ST requirements.
6.How does Aetrix verify that 25LC080A-E/ST is sourced from the original manufacturer or authorized distributors?
All 25LC080A-E/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 25LC080A-E/ST meets industry standards.
7.What is the process for return or replacement of 25LC080A-E/ST?
All 25LC080A-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 25LC080A-E/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 25LC080A-E/ST part is unused and in its original packaging.
Return procedure for 25LC080A-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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