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Microchip Technology AT24CS16-MAHM-E
- Part No.:
- AT24CS16-MAHM-E
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT24CS16-MAHM-E.pdf
- Description:
- IC EEPROM 16KBIT I2C 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,239
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Product details
Overview
AT24CS16-MAHM-E 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 rated for -40°C to +85°C industrial temperature range. It delivers ultra-low standby current (6 µA max) and integrates hardware write protection via WP pin.
For engineers reviewing the AT24CS16-MAHM-E datasheet, AT24CS16-MAHM-E pinout, AT24CS16-MAHM-E application, or AT24CS16-MAHM-E equivalent, key selection considerations include its guaranteed unique serial number across CS Series, 16-byte page write capability with ≤5 ms self-timed write cycle, Schmitt-triggered noise-immune I²C interface, and support for partial page writes in space-constrained embedded systems.
Technical Context
The AT24CS16-MAHM-E implements a two-wire I²C slave interface with bidirectional SDA and unidirectional SCL, using open-drain signaling with integrated Schmitt triggers and input filtering for robust noise immunity. It features an internal high-voltage generation circuit enabling EEPROM programming without external VPP.
Its memory architecture includes two independent address spaces: standard 16-Kbit user EEPROM (2,048 × 8) and a dedicated, read-only 128-bit serial number block accessed via distinct device address (0xBx), both physically isolated-serial number storage consumes no user memory and is permanently locked during wafer fabrication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2,048 × 8), sufficient for firmware identifiers, calibration data, or secure device binding in compact nodes |
| Interface | I²C-compatible two-wire bus: supports 100 kHz (1.7–5.5V), 400 kHz (1.7–5.5V), and 1 MHz FM+ (2.5–5.5V) |
| Supply Voltage | 1.7V to 5.5V - enables direct integration with 1.8V, 3.3V, and 5V microcontrollers without level shifting |
| Write Endurance | 1,000,000 cycles - supports frequent logging or configuration updates over product lifetime |
| Data Retention | 100 years at 55°C - ensures long-term reliability in industrial deployments without refresh |
| Standby Current | 6 µA max at 5.5V - minimizes battery drain in always-on or energy-harvesting edge sensors |
| Write Cycle Time | ≤5 ms maximum - enables deterministic timing for time-critical write operations |
Pinout & Package
AT24CS16-MAHM-E is supplied in an 8-lead SOIC package (JEDEC MS-012, 150 mil width), with pin 1 marked by a notch or dot. All pins are surface-mount compatible and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unused; must be left floating or tied to GND - no electrical function |
| 2 (NC) | No Connect | Internally unused; no routing required on PCB |
| 3 (NC) | No Connect | Internally unused; avoids confusion with legacy pinouts |
| 4 (GND) | Ground Reference | System return path for VCC and I/O; requires low-impedance connection to PCB ground plane |
| 5 (SDA) | Serial Data I/O | Open-drain bidirectional line; requires external 1.3–10 kΩ pull-up resistor to VCC |
| 6 (SCL) | Serial Clock Input | Master-generated clock; rising edge latches input, falling edge clocks out data |
| 7 (WP) | Hardware Write Protect | Active-high signal: tied to VCC blocks all writes; floating defaults to GND (write enabled) |
| 8 (VCC) | Power Supply | 1.7–5.5V supply; must ramp monotonically at ≤0.1 V/µs and stabilize ≥100 µs before first command |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Programmed Serial Number | 128-bit value permanently written and locked during wafer test - eliminates post-silicon serialization overhead and guarantees uniqueness across entire CS Series |
| Page Write Mode | 16-byte pages with partial-write support - reduces bus traffic and improves efficiency when updating small parameter sets |
| Noise-Immune Interface | Schmitt-trigger inputs and spike suppression filters - tolerates >100 ns noise spikes on SCL/SDA, critical in motor-driven or RF-noisy environments |
| Hardware Write Protection | Dedicated WP pin with strong internal pull-down - prevents accidental writes during power transients or firmware faults |
| Green Packaging | Lead-free, halide-free, RoHS-compliant SOIC - meets global environmental compliance without derating or thermal compromise |
Applications
| Asset Tracking Tag | Industrial Sensor Node |
|---|---|
Use Scenario: Battery-powered RFID/NFC-enabled asset tag storing unique ID, last maintenance timestamp, and location history. IC Role / Device Role / Timing Role: Nonvolatile storage for immutable device identity and field-updatable operational metadata. Use Value: Leverages factory-programmed 128-bit serial number for tamper-resistant device authentication and eliminates need for external UID programming in production. | Use Scenario: Wireless vibration sensor mounted on rotating machinery, logging calibration coefficients and fault thresholds. IC Role / Device Role / Timing Role: Persistent configuration storage with guaranteed 100-year retention at elevated ambient temperatures. Use Value: Enables field recalibration without reprogramming MCU flash; 6 µA standby current extends battery life beyond 10 years in sleep-dominated operation. |
| Medical Diagnostic Module | Smart Energy Meter |
Use Scenario: Portable ECG module requiring FDA-compliant device traceability and usage counters. IC Role / Device Role / Timing Role: Secure, write-protected storage for regulatory serial numbers, firmware version logs, and usage cycle counts. Use Value: WP pin hardware lock prevents unauthorized modification of audit-critical fields; 1M endurance supports daily usage logging for >2,700 years. | Use Scenario: DIN-rail mounted electricity meter storing tariff tables, billing intervals, and tamper-event timestamps. IC Role / Device Role / Timing Role: High-reliability nonvolatile memory for revenue-grade configuration data in harsh grid environments. Use Value: Industrial temperature rating (-40°C to +85°C) and 1.7V operation ensure functionality during brownouts and outdoor thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C16D-MAHM-T | Same 16-Kbit capacity and SOIC-8 package, but lacks factory-programmed serial number; supports only 400 kHz max I²C speed | No built-in UID - requires external serialization or MCU-based UID generation | Select when serial number is unnecessary and cost sensitivity outweighs traceability benefits |
| M95160-WMN6TP | 16-Kbit SPI interface (not I²C), 2.5–5.5V supply, 5 ms write cycle, but no serial number or WP pin | Requires SPI host interface and software-managed write protection | Select only if system already uses SPI peripherals and I²C bus is congested or unavailable |
Compared with AT24CS16-MAHM-E, AT24C16D-MAHM-T offers lower unit cost but removes the key differentiator of guaranteed unique serialization, while M95160-WMN6TP trades I²C compatibility and hardware write protection for SPI-native integration - neither provides drop-in replacement capability due to interface or feature mismatch.
Availability
AT24CS16-MAHM-E is available at Aetrix Electronics and suitable for industrial sensor nodes, medical diagnostic modules, smart energy meters, and asset tracking tags requiring stable component supply, long-term lifecycle assurance, and guaranteed device uniqueness.
Supply support for AT24CS16-MAHM-E 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 manufacturer specializing in microcontrollers, analog devices, and memory solutions, with ISO 9001-certified global manufacturing and design centers.
The AT24CS16-MAHM-E belongs to Microchip's CS Series Serial EEPROM family, engineered specifically to eliminate post-production serialization steps in high-volume manufacturing while maintaining full backward compatibility with standard I²C EEPROM protocols.
FAQ
What is the factory-programmed serial number in AT24CS16-MAHM-E used for?
The AT24CS16-MAHM-E contains a 128-bit factory-programmed serial number permanently written during wafer test and locked against modification. This number is globally unique across all CS Series EEPROMs and resides in a dedicated memory region separate from the 16-Kbit user array. It enables secure device identification, anti-counterfeiting, and simplified production line traceability without requiring additional UID programming steps.
Does AT24CS16-MAHM-E support 1 MHz I²C communication?
Yes, AT24CS16-MAHM-E 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, it operates up to 400 kHz Fast Mode. The device automatically adapts to the bus speed based on VCC and master clock frequency, with full AC timing compliance verified per Table 4-3 in the official datasheet DS20006342A.
How does the WP pin function on AT24CS16-MAHM-E?
The WP (Write-Protect) pin on AT24CS16-MAHM-E is an active-high hardware control: when pulled to VCC, it disables all write operations to the entire 16-Kbit array. When left floating, it is internally pulled down to GND, enabling normal writes. Microchip recommends connecting WP to a defined logic state (GND or VCC) using ≤10 kΩ resistors to prevent noise-induced misoperation - the internal pull-down is intentionally strong but not immune to capacitive coupling.
What is the maximum write endurance and data retention of AT24CS16-MAHM-E?
AT24CS16-MAHM-E is specified for 1,000,000 write cycles at 25°C and 3.3V, and 100 years of data retention at 55°C. These values are validated through qualification testing per Microchip's reliability standards and reflect actual cell-level performance - not extrapolated estimates. Retention degrades predictably with temperature, and endurance is maintained under partial-page and byte-write conditions.
Can AT24CS16-MAHM-E operate reliably at 1.7V supply voltage?
Yes, AT24CS16-MAHM-E is fully specified for operation at 1.7V, including 100 kHz I²C communication, read/write functionality, and 6 µA max standby current. Its low-voltage design allows seamless integration with 1.8V logic families and battery-powered systems nearing end-of-life voltage. However, 1 MHz FM+ mode is disabled below 2.5V, and AC timing parameters (e.g., tLOW, tHIGH) scale accordingly per Table 4-3 in DS20006342A.
AT24CS16-MAHM-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- 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-UDFN (2x3)
AT24CS16-MAHM-E FAQ
1.How can I place an order for AT24CS16-MAHM-E through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24CS16-MAHM-E 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-MAHM-E reliable?
The price and inventory of AT24CS16-MAHM-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24CS16-MAHM-E is usually 5 days.
3.What payment methods are accepted for AT24CS16-MAHM-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24CS16-MAHM-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24CS16-MAHM-E?
AT24CS16-MAHM-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24CS16-MAHM-E 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-MAHM-E?
For technical support, including AT24CS16-MAHM-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24CS16-MAHM-E requirements.
6.How does Aetrix verify that AT24CS16-MAHM-E is sourced from the original manufacturer or authorized distributors?
All AT24CS16-MAHM-E 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-MAHM-E meets industry standards.
7.What is the process for return or replacement of AT24CS16-MAHM-E?
All AT24CS16-MAHM-E units undergo pre-shipment inspection (PSI). If there is an issue with AT24CS16-MAHM-E, 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-MAHM-E part is unused and in its original packaging.
Return procedure for AT24CS16-MAHM-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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