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Microchip Technology AT24CSW080-STUM-T
- Part No.:
- AT24CSW080-STUM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AT24CSW080-STUM-T.pdf
- Description:
- IC EEPROM 8KBIT I2C TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:7,612
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Product details
Overview
AT24CSW080-STUM-T from Microchip Technology is an 8-Kbit I²C-compatible serial EEPROM with integrated security register, software write protection, and ultra-low power operation (1.7V–3.6V). It provides 1,024 × 8-bit memory organization, factory-programmed 128-bit unique serial number, and 16 bytes of user-programmable security EEPROM. Used in industrial sensor calibration storage and secure device authentication.
For engineers reviewing the AT24CSW080-STUM-T datasheet, AT24CSW080-STUM-T pinout, AT24CSW080-STUM-T application, or AT24CSW080-STUM-T equivalent, this page delivers verified electrical specs, I²C timing compliance (1 MHz Fast Mode Plus), WP pin behavior, security register structure, and package-specific terminal mapping for SOT23-5 implementation.
Technical Context
The AT24CSW080-STUM-T operates as an I²C client device with fixed hardware address and supports Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) bus speeds across 1.7V–3.6V. Its internal architecture includes dual EEPROM blocks: main array (1,024 × 8) and 256-bit security register (128-bit read-only serial number + 16-byte user-writable page).
Write protection is implemented via both hardware (WP pin) and software (five configurable levels, optionally permanent), while Schmitt-triggered, filtered SCL/SDA inputs ensure noise immunity. Standby current is ≤0.8 μA at 3.6V, and write cycle time is ≤5 ms with self-timed completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1,024 × 8 bits) - full capacity usable for configuration, calibration, or firmware metadata storage |
| Interface | I²C two-wire (SCL/SDA) - compatible with standard microcontroller I²C peripherals without protocol translation |
| Supply Voltage | 1.7V to 3.6V - enables direct integration into battery-powered or low-voltage logic systems |
| Max Clock Frequency | 1 MHz (Fast Mode Plus) - supports high-throughput parameter updates in time-critical embedded systems |
| Write Endurance | 1,000,000 cycles - suitable for frequent field-updatable settings in industrial controllers |
| Data Retention | 100 years at +55°C - guarantees long-term integrity of calibration data or security credentials |
| Standby Current | 0.8 μA max at 3.6V - minimizes quiescent power draw in always-on IoT edge nodes |
| Security Register | 256-bit total: 128-bit factory-locked serial number + 16-byte user-writable EEPROM - enables traceability and tamper-resistant key storage |
Pinout & Package
AT24CSW080-STUM-T is supplied in a 5-lead SOT23 package (STUM suffix), with pin 5 designated as Write-Protect (WP). The WP pin enables hardware-level write inhibition when driven high; floating defaults to GND via internal pull-down. This package variant includes all five functional terminals required for full I²C operation and security control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL (Pin 1) | Serial Clock input | Controls data sampling timing; rising edge latches input, falling edge outputs data - requires external pull-up resistor |
| GND (Pin 2) | Ground reference | System return path for VCC and signal integrity; must connect directly to PCB ground plane |
| SDA (Pin 3) | Bidirectional serial data | Open-drain I/O shared across I²C bus; requires external pull-up ≤10 kΩ and supports wire-OR topology |
| VCC (Pin 4) | Power supply | Supplies internal charge pump and logic; must ramp monotonically at ≤0.1 V/µs during power-up |
| WP (Pin 5) | Hardware write protect | When high, disables all writes to main array and security register; floating defaults to GND for normal operation |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 128-bit serial number | Eliminates on-line serialization overhead; ensures globally unique ID across entire CS/CSW family |
| Software write protection with five levels | Enables granular locking of memory regions (e.g., lock calibration data but allow logging) |
| 16-byte user-writable security EEPROM | Stores cryptographic keys or device-specific secrets with optional permanent write-lock capability |
| Ultra-thin SOT23-5 package (STUM) | Reduces PCB footprint by >60% vs. SOIC-8; supports high-density layout in space-constrained modules |
| 1 MHz Fast Mode Plus support | Reduces write latency by 4× vs. Standard Mode - critical for real-time parameter updates in motor drives |
| ESD protection >4 kV | Withstands handling and system-level transients without external protection components |
Applications
| Industrial Sensor Calibration | Secure Firmware Authentication |
|---|---|
Use Scenario: Storing temperature, pressure, or humidity sensor offset/gain coefficients during factory calibration. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed 100-year data retention and 1M write endurance. Use Value: Eliminates need for external calibration memory; factory-programmed serial number enables automated traceability in production test systems. | Use Scenario: Storing public-key certificates or symmetric keys used to verify signed firmware images on boot. IC Role / Device Role / Timing Role: Tamper-resistant key vault with hardware- and software-enforced write protection. Use Value: Prevents unauthorized key overwrite via WP pin hardening and permanent software lock options for security register pages. |
| Smart Metering Data Logging | Medical Device Configuration Lock |
Use Scenario: Recording energy consumption snapshots or event logs in utility meters with limited power budget. IC Role / Device Role / Timing Role: Low-power (0.8 μA standby) nonvolatile memory supporting burst writes at 1 MHz. Use Value: Enables extended battery life while maintaining fast log commits during voltage dips or brownouts. | Use Scenario: Locking critical safety parameters (e.g., dose limits, alarm thresholds) in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, write-protected configuration store compliant with IEC 62304 Class C requirements. Use Value: Five-tier software protection prevents accidental or malicious modification; factory serial number supports regulatory audit trails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24CSW080-SSHM-T | Same 8-Kbit memory and security features, but in 4-ball WLCSP (0.89 mm × 0.89 mm) instead of SOT23-5 | Targeted at ultra-compact wearables or implantables where board area is constrained | Select when footprint reduction outweighs rework complexity; no change to firmware or I²C interface |
| M95M01-RDW6TP | 1-Mbit SPI EEPROM (not I²C), no security register, 2.5–5.5V supply, 5-ms write cycle | Suitable for legacy SPI-based designs needing higher density but lacking security requirements | Choose only if host lacks I²C or requires >8 Kbit; no serial number or security register functionality |
Compared with AT24CSW080-SSHM-T, the AT24CSW080-STUM-T offers easier hand-soldering and test access via SOT23 leads; versus M95M01-RDW6TP, it delivers I²C compatibility, built-in security primitives, and lower voltage operation - essential for modern battery-powered medical and industrial edge devices.
Availability
AT24CSW080-STUM-T is available at Aetrix Electronics and suitable for industrial sensor calibration, secure firmware authentication, and smart metering data logging requiring stable component supply and long-term lifecycle support.
Supply support for AT24CSW080-STUM-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, FPGA, and memory solutions, with emphasis on reliability and long-term product availability.
The AT24CSW080-STUM-T belongs to Microchip's CSW-series serial EEPROM family, designed specifically for secure, low-voltage, space-constrained embedded applications requiring factory-unique identification and robust write protection.
FAQ
What is the function of the WP pin on the AT24CSW080-STUM-T?
The WP (Write-Protect) pin on the AT24CSW080-STUM-T is a hardware-level control that, when driven high (≥0.7×VCC), inhibits all write operations to both the main EEPROM array and the security register. When left unconnected, it is internally pulled down to GND, enabling normal write functionality. Microchip recommends connecting WP to a defined logic state to prevent noise-induced protection errors - a key design consideration for industrial environments where EMI may affect floating pins.
Does the AT24CSW080-STUM-T support 1 MHz I²C communication?
Yes, the AT24CSW080-STUM-T fully supports I²C Fast Mode Plus at up to 1 MHz across its entire operating voltage range (1.7V–3.6V). This capability allows faster parameter updates compared to standard (100 kHz) or fast (400 kHz) modes, reducing write latency to ≤5 ms per page. The device includes Schmitt-triggered inputs and spike suppression filters to maintain signal integrity at high clock rates, making it suitable for time-sensitive applications like real-time sensor recalibration.
How is the 128-bit serial number in the AT24CSW080-STUM-T programmed and protected?
The 128-bit serial number in the AT24CSW080-STUM-T is factory-programmed during Microchip's wafer-level production and permanently locked - it cannot be altered, erased, or rewritten by end users. It resides in the read-only section of the 256-bit security register and consumes no space from the main 8-Kbit EEPROM array. This ensures global uniqueness across all CS/CSW-series devices, enabling automated traceability in manufacturing without requiring additional serialization infrastructure.
Can the AT24CSW080-STUM-T operate reliably at 1.7V?
Yes, the AT24CSW080-STUM-T is fully specified for operation down to 1.7V, including all I²C timing parameters (100/400/1000 kHz), read/write functionality, and standby current (≤0.8 μA). Its low-voltage design supports direct integration into coin-cell-powered or energy-harvesting systems. However, power-up must follow monotonic ramp requirements (≤0.1 V/µs), and tPUP (100 µs delay after VCC stabilization) must be observed before issuing commands to ensure reliable initialization.
What is the difference between the AT24CSW080-STUM-T and AT24CSW080-SSHM-T?
The AT24CSW080-STUM-T uses a 5-lead SOT23 package optimized for manual assembly, test accessibility, and thermal dissipation, while the AT24CSW080-SSHM-T uses a 4-ball WLCSP (0.89 mm × 0.89 mm) for ultra-miniaturized applications. Both share identical electrical specifications, memory organization, security register structure, and I²C interface behavior. The STUM variant is preferred for prototyping and medium-volume industrial designs; the SSHM variant targets high-density consumer wearables where PCB area is severely constrained.
AT24CSW080-STUM-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 450 ns
- Voltage - Supply:
- 1.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
AT24CSW080-STUM-T FAQ
1.How can I place an order for AT24CSW080-STUM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24CSW080-STUM-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 AT24CSW080-STUM-T reliable?
The price and inventory of AT24CSW080-STUM-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24CSW080-STUM-T is usually 5 days.
3.What payment methods are accepted for AT24CSW080-STUM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24CSW080-STUM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24CSW080-STUM-T?
AT24CSW080-STUM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24CSW080-STUM-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 AT24CSW080-STUM-T?
For technical support, including AT24CSW080-STUM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24CSW080-STUM-T requirements.
6.How does Aetrix verify that AT24CSW080-STUM-T is sourced from the original manufacturer or authorized distributors?
All AT24CSW080-STUM-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 AT24CSW080-STUM-T meets industry standards.
7.What is the process for return or replacement of AT24CSW080-STUM-T?
All AT24CSW080-STUM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24CSW080-STUM-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 AT24CSW080-STUM-T part is unused and in its original packaging.
Return procedure for AT24CSW080-STUM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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