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Microchip Technology AT25080B-CUL-T
- Part No.:
- AT25080B-CUL-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFBGA
- Datasheet:
-
AT25080B-CUL-T.pdf
- Description:
- IC EEPROM 8KBIT SPI 20MHZ 8VFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,486
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Product details
Overview
AT25080B-CUL-T from Microchip Technology is an 8-Kbit SPI Serial EEPROM organized as 1,024 × 8 bits, operating from 1.8V to 5.5V with industrial temperature range (−40°C to +85°C), 20 MHz max clock rate at 5V, and 32-byte page write capability. It serves as nonvolatile configuration storage in microcontroller-based systems requiring robust data retention and hardware/software write protection.
For engineers reviewing the AT25080B-CUL-T datasheet, AT25080B-CUL-T pinout, AT25080B-CUL-T application, or AT25080B-CUL-T equivalent, key selection criteria include its SPI Mode 0/3 compatibility, 5 ms max self-timed write cycle, 1M endurance, 100-year data retention, and dual-layer write protection via WP pin and STATUS register control.
Technical Context
The AT25080B-CUL-T implements a synchronous SPI slave interface with fixed MSB-first serial protocol, supporting both Mode 0 (SCK idle low) and Mode 3 (SCK idle high); data is latched on SCK rising edge and output on falling edge. Its internal architecture includes a high-voltage generation circuit for EEPROM programming, a STATUS register with WPEN, BP1, and BP0 bits for block protection, and a dedicated HOLD pin for pausing ongoing serial transfers without resetting the sequence.
Write operations require explicit WREN instruction before WRITE or WRSR commands; the Write Enable Latch (WEL) bit resets automatically after each write cycle or CS deassertion. The device enters Standby mode at power-up with WEL = 0 and Ready/Busy = 0, and supports software reset via CS toggle without SCK activity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbits (1,024 × 8), sufficient for firmware boot parameters, calibration data, or device ID storage |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V logic domains without level shifters |
| Max Clock Frequency | 20 MHz at VCC ≥ 4.5V - supports high-speed configuration loading in real-time systems |
| Page Write Size | 32 bytes - minimizes write latency versus byte-write; enables efficient bulk updates within one command |
| Write Endurance | 1,000,000 cycles - ensures reliable field operation over 10+ years in logging or counter applications |
| Data Retention | 100 years at 55°C - guarantees long-term integrity of stored settings without refresh |
| Operating Temperature | −40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor IoT nodes |
Pinout & Package
AT25080B-CUL-T is supplied in an 8-lead SOIC package (3.9 mm × 4.9 mm, 1.27 mm pitch), RoHS-compliant and halide-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition high→low before SCK to initiate command; drives SO into high-Z when high |
| SO | Serial Data Output | Tri-state output; data valid on falling SCK edge; high-Z when CS high or HOLD active |
| WP | Write-Protect Input | Hardware lock: inhibits STATUS register writes when low and WPEN=1; configurable via STATUS register |
| GND | Ground Reference | Return path for VCC and all I/O; must be low-impedance connection to system ground plane |
| SI | Serial Data Input | Command/address/data input; sampled on rising SCK edge; ignored during HOLD or CS high |
| SCK | Serial Clock Input | Synchronous timing reference; polarity/phase defines SPI Mode 0 or 3; no internal clock generation |
| HOLD | Suspend Control | Pauses ongoing read/write transfer without aborting; SO goes high-Z; SI/SCK ignored until HOLD deasserted |
| VCC | Power Supply | 1.8–5.5V core supply; requires local 100 nF decoupling; POR circuit enforces tPUP ≥ 100 µs delay before first command |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Support | Interoperates with diverse host controllers (e.g., ARM Cortex-M, PIC, STM32) without protocol translation |
| 32-Byte Page Write | Reduces average write time by >90% vs. byte-write for multi-byte updates; improves system responsiveness |
| Block Write Protection | Configurable 1/4, 1/2, or full array lock via STATUS register BP1/BP0 bits - prevents accidental firmware corruption |
| Hardware + Software Write Protection | WP pin provides board-level security; STATUS-controlled WPEN allows dynamic enable/disable in runtime |
| 5 ms Max Self-Timed Write Cycle | Eliminates need for external polling delay timers; simplifies firmware and reduces CPU overhead |
Applications
| Industrial Sensor Node | Medical Device Calibration |
|---|---|
Use Scenario: Remote environmental sensor collects temperature/humidity data and stores device-specific calibration coefficients across power cycles. IC Role / Device Role / Timing Role: Nonvolatile parameter store holding factory-trimmed offsets and gain factors; accessed during boot and periodic recalibration. Use Value: Ensures measurement accuracy remains stable over 100 years; 1M endurance supports daily recalibration logs without wear-out risk. | Use Scenario: Portable blood glucose meter retains user-specific calibration curves and usage history between battery replacements. IC Role / Device Role / Timing Role: Secure configuration memory storing encrypted calibration profiles and audit logs; accessed only during initialization or service mode. Use Value: Dual write protection (WP pin + STATUS register) prevents unauthorized modification; 1.8V operation extends battery life in low-power sleep states. |
| Automotive Body Control Module | Smart Home Gateway |
Use Scenario: Door module stores seat position presets, mirror angles, and lighting preferences for multiple drivers. IC Role / Device Role / Timing Role: Persistent user preference storage; written infrequently but read at every power-on; must survive −40°C cold starts. Use Value: Industrial temperature rating (−40°C to +85°C) and 100-year retention guarantee data integrity across vehicle lifetime without backup power. | Use Scenario: Wi-Fi gateway saves network credentials, Zigbee channel maps, and OTA update metadata across reboots and firmware upgrades. IC Role / Device Role / Timing Role: Boot-critical configuration store; accessed early in startup sequence; requires fast 20 MHz SPI reads to minimize boot time. Use Value: 20 MHz clock support at 3.3V enables sub-100 µs read access; page write allows atomic credential updates without partial-write corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95080-DRMN6TP/K | 8-Kbit SPI EEPROM (1,024 × 8), 2.5–5.5V supply, 10 MHz max clock at 2.5V, 5 ms write cycle, same 8-lead SOIC package | Limited to 2.5V min supply; lower max speed at low voltage; identical pinout and command set | Select when system operates ≥2.5V and 10 MHz suffices; verify HOLD/WP timing alignment per STMicro datasheet |
| CAT25080VI-GT3 | 8-Kbit SPI EEPROM, 1.8–5.5V, 20 MHz max clock, 5 ms write cycle, 1M endurance, 100-year retention, 8-lead SOIC | Functionally identical electrical specs; different STATUS register bit mapping for BP bits; minor AC timing variances | Drop-in alternative if STATUS register usage is limited to default protection; confirm BP bit behavior matches design intent |
Compared with M95080-DRMN6TP/K, AT25080B-CUL-T supports full 1.8V operation and higher clock rates at low voltage; versus CAT25080VI-GT3, it offers identical performance but distinct STATUS register implementation - requiring verification of block protection logic in firmware.
Availability
AT25080B-CUL-T is available at Aetrix Electronics and suitable for industrial sensor nodes, medical calibration storage, automotive body control modules, and smart home gateways requiring stable component supply across extended product lifecycles.
Supply support for AT25080B-CUL-T 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 is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with a focus on reliability, longevity, and industrial-grade qualification.
The AT25080B-CUL-T belongs to Microchip's AT25xxx SPI EEPROM product line, designed specifically for low-voltage, high-reliability nonvolatile storage in space-constrained embedded systems where data integrity and long-term retention are critical.
FAQ
What is the maximum clock frequency supported by the AT25080B-CUL-T at 3.3V operation?
The AT25080B-CUL-T supports up to 10 MHz at VCC = 2.5V to 5.5V, which includes 3.3V operation. This is specified in Table 4-3 of the DS20006244A datasheet under AC Characteristics. At 3.3V, timing margins remain robust for most microcontroller SPI peripherals, and the device maintains full functionality including HOLD, WP, and page write features. Always verify setup/hold times against your master's SCK edge rates.
Does the AT25080B-CUL-T require external pull-up resistors on its control pins?
Yes - the AT25080B-CUL-T requires a pull-up resistor (≤10 kΩ) on the CS pin to ensure proper power-up behavior, as specified in Section 2.1 of the datasheet. While SI, SCK, and SO are driven actively by the host, unconnected WP and HOLD pins should be pulled high or low per system security requirements. Leaving WP floating may cause unintended write protection activation due to noise susceptibility.
How does the HOLD function behave during an active write cycle in the AT25080B-CUL-T?
The HOLD function has no effect on an ongoing internal write cycle in the AT25080B-CUL-T. As stated in Section 5.3, "the Hold mode does not have an effect on the internal write cycle." While HOLD can pause serial communication (e.g., mid-read), it cannot interrupt or suspend the 5 ms self-timed EEPROM programming operation once initiated. The device continues writing and asserts BUSY via STATUS register until completion.
Can the AT25080B-CUL-T be used in SPI Mode 1 or Mode 2 configurations?
No - the AT25080B-CUL-T explicitly supports only SPI Modes 0 and 3, as confirmed in the Features section and Section 5 of the datasheet. These modes share the same data sampling (rising SCK edge for input, falling edge for output) but differ in SCK idle polarity. Modes 1 and 2 - which sample on falling SCK edges - are not compatible and will result in corrupted communication or no response.
What is the default state of the STATUS register after power-up for the AT25080B-CUL-T?
At power-up, the AT25080B-CUL-T defaults to Standby mode with WEL = 0 and Ready/Busy = 0 (indicating readiness). The WPEN, BP1, and BP0 bits retain their last written nonvolatile values - they are not reset. The EEPROM array ships with all FFh (0xFF) data. This behavior is documented in Section 4.6.5 and 4.6.6 of DS20006244A, ensuring predictable startup without unintended write-enable or protection states.
AT25080B-CUL-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFBGA
- 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:
- 20 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-VFBGA (1.5x2)
AT25080B-CUL-T FAQ
1.How can I place an order for AT25080B-CUL-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25080B-CUL-T 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 AT25080B-CUL-T reliable?
The price and inventory of AT25080B-CUL-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25080B-CUL-T is usually 5 days.
3.What payment methods are accepted for AT25080B-CUL-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25080B-CUL-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25080B-CUL-T?
AT25080B-CUL-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25080B-CUL-T 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 AT25080B-CUL-T?
For technical support, including AT25080B-CUL-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25080B-CUL-T requirements.
6.How does Aetrix verify that AT25080B-CUL-T is sourced from the original manufacturer or authorized distributors?
All AT25080B-CUL-T 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 AT25080B-CUL-T meets industry standards.
7.What is the process for return or replacement of AT25080B-CUL-T?
All AT25080B-CUL-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25080B-CUL-T, 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 AT25080B-CUL-T part is unused and in its original packaging.
Return procedure for AT25080B-CUL-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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