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Microchip Technology AT24CS16-XHM-T
- Part No.:
- AT24CS16-XHM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24CS16-XHM-T.pdf
- Description:
- IC EEPROM 16KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,274
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Product details
Overview
AT24CS16-XHM-T from Microchip Technology is a 16-Kbit I²C-compatible serial EEPROM with factory-programmed 128-bit unique serial number, organized as 2,048 × 8 bits, operating from 1.7V to 5.5V, supporting 1 MHz Fast Mode Plus, and featuring hardware write protection via WP pin for industrial applications requiring secure device identification and nonvolatile data storage.
For engineers reviewing the AT24CS16-XHM-T datasheet, AT24CS16-XHM-T pinout, AT24CS16-XHM-T application, or AT24CS16-XHM-T equivalent, this page delivers verified electrical specs, package mapping to 8-lead SOIC, validated I²C timing compliance (100/400 kHz standard/fast mode, 1 MHz FM+), endurance (1M cycles), data retention (100 years), and real-world use cases in asset tracking and secure boot configuration.
Technical Context
The AT24CS16-XHM-T implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA/SCL inputs, supporting bidirectional data transfer at up to 1 MHz under 2.5–5.5V. Its internal architecture includes dedicated 128-bit read-only serial number memory block-separate from user EEPROM array-and integrated high-voltage generation for write operations.
Write protection is enforced via external WP pin logic: tied to VCC disables all writes; tied to GND enables full-array writes; floating defaults to GND via strong internal pull-down. Standby current is ≤6 µA at 5.5V, active write current ≤3 mA, and self-timed write cycle completes within 5 ms maximum.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2,048 × 8) EEPROM + separate 128-bit factory serial number |
| Supply Voltage | 1.7V to 5.5V - supports single-supply operation across battery-powered and industrial rails |
| I²C Speed Modes | 100 kHz (std), 400 kHz (fast), 1 MHz (FM+) - enables high-throughput configuration loading |
| Write Endurance | 1,000,000 cycles - suitable for frequent calibration or logging updates |
| Data Retention | 100 years at 55°C - ensures long-term firmware or security key persistence |
| Standby Current | ≤6 µA at 5.5V - minimizes power draw in always-on edge nodes |
| Operating Temp | -40°C to +85°C - qualified for industrial ambient environments |
Pinout & Package
AT24CS16-XHM-T is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) with standard JEDEC MS-012AC footprint. Pin 1 is index-marked; pin 4 = GND; pin 5 = SDA; pin 6 = SCL; pin 7 = WP; pin 8 = VCC. Pins 1–3 are no-connect (NC) and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 4) | Ground reference | System return path for VCC and I/O; must connect directly to PCB ground plane |
| SDA (Pin 5) | Serial Data I/O | Open-drain bidirectional line; requires external 1.3–10 kΩ pull-up to VCC per I²C speed grade |
| SCL (Pin 6) | Serial Clock input | Master-generated clock; rising edge latches input, falling edge outputs data |
| WP (Pin 7) | Hardware write protect | Logic high = full-array write inhibit; logic low = normal write; floating = internal pull-down to GND |
| VCC (Pin 8) | Power supply | 1.7–5.5V input; must ramp monotonically at ≤0.1 V/µs during power-up |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 128-bit serial number | Permanently locked, globally unique across entire CS Series - eliminates production-line serialization overhead |
| 16-byte page write with partial writes | Enables efficient small-data updates without erasing full pages - reduces write latency in sensor node logging |
| Schmitt-triggered, filtered I²C inputs | Suppresses bus noise and EMI-induced glitches - improves reliability in electrically noisy industrial enclosures |
| ESD protection >4,000V | Robust handling during board assembly and field service - meets IEC 61000-4-2 Level 3 |
| Green packaging | Lead-free, halide-free, RoHS-compliant SOIC - satisfies global environmental compliance requirements |
Applications
| Asset Tracking Tag | Secure Boot Configuration |
|---|---|
Use Scenario: Embedded in industrial IoT tags attached to machinery or tools for lifecycle management. IC Role / Device Role / Timing Role: Stores immutable device ID, calibration data, and maintenance history accessed via I²C during commissioning. Use Value: Factory-unique 128-bit serial number enables zero-touch identity binding; 100-year data retention ensures traceability over equipment lifetime. | Use Scenario: Used in medical or industrial controllers to store cryptographic keys and boot policy flags. IC Role / Device Role / Timing Role: Nonvolatile storage for secure boot parameters; WP pin hardens against runtime corruption during firmware update. Use Value: Hardware write protection prevents unauthorized modification of critical boot assets; 1M endurance supports repeated secure provisioning cycles. |
| Smart Meter Calibration | Industrial HMI Settings Storage |
Use Scenario: Installed in utility meters to retain calibration coefficients and tariff tables across power cycles. IC Role / Device Role / Timing Role: Low-power EEPROM holding metrology-critical values; accessed infrequently but with guaranteed integrity. Use Value: 6 µA standby current extends battery life in AMI endpoints; -40°C to +85°C rating ensures operation in outdoor meter enclosures. | Use Scenario: Mounted on human-machine interface panels to preserve user preferences and display configurations. IC Role / Device Role / Timing Role: Persistent storage for UI state, language selection, and brightness settings updated via microcontroller I²C. Use Value: 16-byte page write allows atomic updates of multi-parameter settings; 1.7V operation supports brown-out resilience during AC line dips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C16D-SSHM-T | Same 16-Kbit capacity, identical SOIC-8 package, but lacks factory-programmed serial number; supports only 400 kHz max I²C speed | No built-in unique ID - requires external serialization logic or software-based ID generation | Select when serial number functionality is unnecessary and cost sensitivity outweighs traceability needs |
| M95128-DFMN6TP | 128-Kbit SPI EEPROM in 8-lead SOIC; higher density but different interface (SPI vs I²C); no factory serial number | Requires SPI host interface and separate GPIO for write protection; incompatible protocol stack | Choose only if system already uses SPI peripherals and memory expansion beyond 16 Kbit is required |
Compared with AT24CS16-XHM-T, AT24C16D-SSHM-T offers lower cost but forfeits the tamper-proof 128-bit ID essential for anti-counterfeiting, while M95128-DFMN6TP trades I²C simplicity for SPI bandwidth and density - neither provides drop-in replacement capability due to missing serial number or interface mismatch.
Availability
AT24CS16-XHM-T is available at Aetrix Electronics and suitable for industrial IoT tagging, secure boot configuration, and smart meter calibration requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AT24CS16-XHM-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 Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with ISO 9001-certified manufacturing and global distribution.
The AT24CS16-XHM-T belongs to Microchip's CS Series Serial EEPROM product line, designed specifically for applications demanding guaranteed device uniqueness, low-voltage operation, and industrial-grade reliability in space-constrained systems.
FAQ
What is the function of the WP pin on the AT24CS16-XHM-T?
The WP (Write-Protect) pin on the AT24CS16-XHM-T controls hardware-level write access to the entire EEPROM array. When pulled high to VCC, it inhibits all write operations including byte and page writes; when grounded, it enables normal writes; if left floating, an internal strong pull-down defaults it to GND. This pin is critical for safeguarding calibration data or security keys in deployed AT24CS16-XHM-T devices.
Does the AT24CS16-XHM-T support 1 MHz I²C communication?
Yes, the AT24CS16-XHM-T supports 1 MHz Fast Mode Plus (FM+) I²C operation, but only within the 2.5V to 5.5V VCC range. At 1.7V to 2.5V, maximum speed is limited to 400 kHz. The device's AC characteristics confirm tLOW/tHIGH timing compliance at 1 MHz, enabling faster configuration loading than standard 400 kHz EEPROMs - a key advantage in time-sensitive AT24CS16-XHM-T implementations.
How is the 128-bit serial number accessed on the AT24CS16-XHM-T?
The 128-bit serial number on the AT24CS16-XHM-T is accessed via a dedicated I²C address block using device type identifier '1011b' (0xBx) instead of the standard '1010b' (0xAx) used for EEPROM memory. It resides in a separate, read-only memory region that does not consume user-addressable space. Reads require a valid start condition, the 0xBx address byte, and appropriate word addressing - all fully documented in the AT24CS16-XHM-T datasheet section 6.1.
What is the endurance and data retention specification for the AT24CS16-XHM-T?
The AT24CS16-XHM-T guarantees 1,000,000 write cycles per memory location and 100 years of data retention at 55°C - both validated through qualification testing per Microchip's reliability standards. These figures apply to the main 16-Kbit EEPROM array; the factory-programmed 128-bit serial number is permanently locked and unaffected by write cycles. This makes the AT24CS16-XHM-T suitable for high-update-rate logging or calibration storage where longevity is mission-critical.
Is the AT24CS16-XHM-T compatible with standard I²C bus protocols?
Yes, the AT24CS16-XHM-T is fully I²C-compatible and adheres to standard two-wire protocol requirements: it responds to 7-bit slave addresses (0xA0–0xA7 for EEPROM, 0xB0–0xB7 for serial number), supports ACK/NACK handshaking, observes Start/Stop conditions, and complies with timing budgets for standard (100 kHz), fast (400 kHz), and fast-plus (1 MHz) modes. Its open-drain SDA/SCL pins and integrated noise filtering ensure robust interoperability with any I²C master - a core design feature of the AT24CS16-XHM-T.
AT24CS16-XHM-T 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:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 550 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT24CS16-XHM-T FAQ
1.How can I place an order for AT24CS16-XHM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24CS16-XHM-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 AT24CS16-XHM-T reliable?
The price and inventory of AT24CS16-XHM-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24CS16-XHM-T is usually 5 days.
3.What payment methods are accepted for AT24CS16-XHM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24CS16-XHM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24CS16-XHM-T?
AT24CS16-XHM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24CS16-XHM-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 AT24CS16-XHM-T?
For technical support, including AT24CS16-XHM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24CS16-XHM-T requirements.
6.How does Aetrix verify that AT24CS16-XHM-T is sourced from the original manufacturer or authorized distributors?
All AT24CS16-XHM-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 AT24CS16-XHM-T meets industry standards.
7.What is the process for return or replacement of AT24CS16-XHM-T?
All AT24CS16-XHM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24CS16-XHM-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 AT24CS16-XHM-T part is unused and in its original packaging.
Return procedure for AT24CS16-XHM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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