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Microchip Technology AT24CSW010-UUM0B-T
- Part No.:
- AT24CSW010-UUM0B-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
AT24CSW010-UUM0B-T.pdf
- Description:
- IC EEPROM 1KBIT I2C 1MHZ 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:82,641
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Product details
Overview
AT24CSW010-UUM0B-T from Microchip Technology (formerly Atmel) is a 1-Kbit I²C-compatible serial EEPROM with integrated security register, software write protection, and ultra-thin 4-ball WLCSP packaging. It operates from 1.7V to 3.6V, supports 1MHz Fast Mode Plus, delivers ≤1mA active current and ≤0.8μA standby current, and provides factory-programmed 128-bit unique serial number for device authentication in secure boot or anti-counterfeiting systems.
For engineers reviewing the AT24CSW010-UUM0B-T datasheet, AT24CSW010-UUM0B-T pinout, AT24CSW010-UUM0B-T application, or AT24CSW010-UUM0B-T equivalent, this page delivers verified electrical specs, validated I²C timing compliance (1MHz FM+), confirmed 4-ball WLCSP pin mapping, real-world security register usage, and two field-validated alternative parts with documented functional trade-offs.
Technical Context
The AT24CSW010-UUM0B-T implements a true I²C slave interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and bidirectional data transfer synchronized to SCL edges (data latched on rising edge, output on falling edge). Its memory architecture separates 128-byte main EEPROM (0000h–007Fh) from a dedicated 32-byte security register (80h–9Fh), where the first 16 bytes contain permanent factory-programmed serial number and the next 16 bytes support user programming and optional permanent lock.
Write protection is enforced via an 8-bit Write Protect Register with five configurable block-protection levels, and hardware slave addressing is fixed at A2=0, A1=0, A0=0 (device address 0xA0 for writes, 0xA1 for reads), eliminating external address pins and simplifying multi-device bus design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1-Kbit (128 × 8 bits); enables compact firmware parameter storage without external memory controller overhead |
| Supply voltage | 1.7V to 3.6V; supports direct interfacing with 1.8V/2.5V/3.3V microcontrollers without level-shifting |
| I²C speed modes | 100kHz standard, 400kHz fast, and 1MHz fast mode plus; ensures compatibility with legacy and high-speed host controllers |
| Security register | 256-bit total: 128-bit factory-unique read-only serial number + 128-bit user-programmable section; eliminates need for external serialization hardware |
| Endurance & retention | 1,000,000 write cycles and 100-year data retention; suitable for infrequently updated calibration or configuration data in industrial equipment |
| Power consumption | ≤1mA active current, ≤0.8μA standby current; extends battery life in portable medical or sensor nodes |
| Package | 4-ball Ultra-Thin WLCSP (0.84mm × 0.84mm, 0.4mm pitch); enables space-constrained wearable and IoT endpoint designs |
Pinout & Package
AT24CSW010-UUM0B-T uses a 4-ball Ultra-Thin Wafer-Level Chip Scale Package (WLCSP) with bottom-side solder balls. The package footprint is 0.84mm × 0.84mm with 0.4mm ball pitch and conforms to JEDEC MO-263AC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 1.7V–3.6V; must be decoupled locally with ≥100nF ceramic capacitor to suppress I²C switching noise |
| GND | Ground reference | System ground return path; requires low-impedance connection to minimize ground bounce during write cycles |
| SCL | Serial clock input | Input-only; requires external pull-up resistor (≤10kΩ) to VCC; integrates Schmitt trigger and noise filter |
| SDA | Serial data bidirectional I/O | Open-drain; requires external pull-up resistor (≤10kΩ); supports wire-OR with other I²C devices on same bus |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 128-bit serial number | Guaranteed unique across entire CS Series; enables zero-touch device identity provisioning in manufacturing without custom programming steps |
| Software-configurable write protection | Five protection levels (none, top quarter, half, three-quarters, full); allows selective locking of calibration data while permitting runtime logging in unprotected pages |
| User-programmable security register section | 16 bytes (128 bits) with optional permanent lock; stores cryptographic keys or secure boot flags that survive firmware updates |
| Ultra-low standby current | 0.8μA maximum at 3.6V; reduces quiescent power in always-on sensor nodes powered by coin cells |
| Self-timed write cycle | ≤5ms max duration; eliminates need for host polling or timeout management-host can issue next command after ACK |
Applications
| Secure Firmware Authentication | Medical Device Calibration Storage |
|---|---|
Use Scenario: Embedded microcontroller verifies firmware signature against key stored in AT24CSW010-UUM0B-T during boot sequence. IC Role / Device Role / Timing Role: Secure non-volatile key repository; accessed once per boot via I²C before application code execution. Use Value: Prevents unauthorized firmware loading using cryptographically bound keys; 128-bit uniqueness eliminates cloning risk across production batches. | Use Scenario: Portable blood glucose meter stores factory-calibrated sensor coefficients and patient-specific offset values. IC Role / Device Role / Timing Role: Tamper-resistant configuration memory; written once during calibration, read on every power-up. Use Value: Software write protection prevents accidental overwrites; 100-year data retention ensures accuracy over product lifetime. |
| IoT Edge Node Identity | Industrial Sensor Network Configuration |
Use Scenario: Smart thermostat uses AT24CSW010-UUM0B-T to store device ID, MAC address, and TLS certificate thumbprint for cloud onboarding. IC Role / Device Role / Timing Role: Root-of-trust identity anchor; accessed during network initialization and OTA update verification. Use Value: Factory-programmed serial number serves as immutable hardware identifier; eliminates need for post-silicon provisioning infrastructure. | Use Scenario: Programmable logic controller (PLC) module retains node address, I/O mapping, and alarm thresholds across power cycles. IC Role / Device Role / Timing Role: Persistent configuration register; updated only when user reprograms via HMI or engineering tool. Use Value: 1MHz I²C interface enables fast configuration load during startup; page-write mode minimizes write time for multi-byte settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Microchip AT24CSW010-SSHM-T | Same 1-Kbit capacity, identical security register and write protection features, but in 8-lead SOIC package (3.9mm × 4.9mm) | Requires PCB layout change due to larger footprint and through-hole or gull-wing leads; better for prototyping or repair-friendly designs | Select when board space permits larger package and hand-soldering or socketing is preferred over WLCSP reflow |
| ON Semiconductor CAT24C01HU4I-GT3 | 1-Kbit I²C EEPROM with 1.7V–5.5V operation, no security register or factory serial number; 4-ball WLCSP package (same 0.84mm × 0.84mm size) | Lacks hardware-level device identity and permanent lock capability; suitable only for basic parameter storage without security requirements | Select only if security features are unnecessary and broader voltage range (up to 5.5V) is required for mixed-voltage systems |
Compared with AT24CSW010-SSHM-T, AT24CSW010-UUM0B-T saves >90% board area and enables miniaturized wearables; compared with CAT24C01HU4I-GT3, it adds irreplaceable cryptographic identity and tamper-proof key storage-critical for regulated medical or industrial deployments.
Availability
AT24CSW010-UUM0B-T is available at Aetrix Electronics and suitable for secure boot, medical calibration, IoT identity, and industrial configuration storage requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.
Supply support for AT24CSW010-UUM0B-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 global semiconductor company specializing in microcontrollers, analog components, and secure memory solutions, with broad industrial and automotive qualification coverage.
The AT24CSW010-UUM0B-T belongs to Microchip's CS Series Serial EEPROM family, designed specifically for applications demanding hardware-rooted device identity, cryptographic key storage, and robust write protection in ultra-compact form factors.
FAQ
What is the factory-assigned I²C slave address for AT24CSW010-UUM0B-T?
The AT24CSW010-UUM0B-T has a fixed hardware slave address of 0x50 (0b1010000) for write operations and 0x51 (0b1010001) for read operations. This corresponds to device type identifier 0b1010 and A2/A1/A0 = 0/0/0, as indicated by the "0" suffix in the part number. No external address pins are required, simplifying multi-device bus topology.
Does AT24CSW010-UUM0B-T support 1MHz I²C communication across its full voltage range?
Yes, AT24CSW010-UUM0B-T supports Fast Mode Plus (FM+) at 1MHz over the entire specified supply range of 1.7V to 3.6V. This is explicitly confirmed in the datasheet's AC characteristics table and distinguishes it from standard Fast Mode (400kHz) devices that often require ≥2.5V for full-speed operation.
How is the 128-bit serial number in AT24CSW010-UUM0B-T accessed and protected?
The 128-bit serial number resides in bytes 0x80–0x8F of the security register and is read-only. It is accessed by sending device address 0xB0 (for write) or 0xB1 (for read) followed by word address 0x80. The value is permanently locked during Atmel's production process and cannot be altered, erased, or overwritten-even by issuing the lock command-ensuring guaranteed uniqueness across all CS Series devices.
Can the user-programmable section of the security register in AT24CSW010-UUM0B-T be made permanently read-only?
Yes, the upper 16 bytes (0x90–0x9F) of the security register in AT24CSW010-UUM0B-T can be permanently locked via a documented software lock command sequence. Once locked, no further writes-including erase-are possible. This feature is used to store cryptographic keys or secure boot flags that must remain immutable throughout the device's lifetime.
What is the maximum write endurance and data retention specification for AT24CSW010-UUM0B-T?
AT24CSW010-UUM0B-T guarantees 1,000,000 write/erase cycles and 100 years of data retention at +25°C. These figures are measured and specified under worst-case conditions (max VCC, max temperature) and apply to both the main EEPROM array and the user-programmable portion of the security register.
AT24CSW010-UUM0B-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 4-XFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 128 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:
- 4-WLCSP
AT24CSW010-UUM0B-T FAQ
1.How can I place an order for AT24CSW010-UUM0B-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24CSW010-UUM0B-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 AT24CSW010-UUM0B-T reliable?
The price and inventory of AT24CSW010-UUM0B-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24CSW010-UUM0B-T is usually 5 days.
3.What payment methods are accepted for AT24CSW010-UUM0B-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24CSW010-UUM0B-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24CSW010-UUM0B-T?
AT24CSW010-UUM0B-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24CSW010-UUM0B-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 AT24CSW010-UUM0B-T?
For technical support, including AT24CSW010-UUM0B-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24CSW010-UUM0B-T requirements.
6.How does Aetrix verify that AT24CSW010-UUM0B-T is sourced from the original manufacturer or authorized distributors?
All AT24CSW010-UUM0B-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 AT24CSW010-UUM0B-T meets industry standards.
7.What is the process for return or replacement of AT24CSW010-UUM0B-T?
All AT24CSW010-UUM0B-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24CSW010-UUM0B-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 AT24CSW010-UUM0B-T part is unused and in its original packaging.
Return procedure for AT24CSW010-UUM0B-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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