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Microchip Technology AT24CS01-MAHM-T
- Part No.:
- AT24CS01-MAHM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT24CS01-MAHM-T.pdf
- Description:
- IC EEPROM 1KBIT I2C 1MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,820
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Product details
Overview
AT24CS01-MAHM-T from Microchip Technology is a 1-Kbit (128 × 8) I²C-compatible serial EEPROM with factory-programmed 128-bit unique serial number, 1.7V–5.5V supply range, and industrial temperature rating (−40°C to +85°C). It supports Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) I²C operation and features hardware write protection via WP pin for full-array data security in embedded system configuration storage.
For engineers reviewing the AT24CS01-MAHM-T datasheet, AT24CS01-MAHM-T pinout, AT24CS01-MAHM-T application, or AT24CS01-MAHM-T equivalent, key selection considerations include its guaranteed unique serial number across CS Series, ultra-low standby current (≤6 μA), page-write capability (8-byte pages), self-timed write cycle (≤5 ms), and compatibility with multi-device I²C bus topologies using A0/A1/A2 address inputs.
Technical Context
The AT24CS01-MAHM-T operates as an I²C slave device with open-drain SDA/SCL interface, Schmitt-triggered inputs, and integrated spike suppression filters for noise immunity. Its memory is organized as 128 words of 8 bits across 16 pages, with separate read-only 128-bit serial number block accessed via distinct device address (0xB0–0xBF).
It implements hardware write protection via dedicated WP pin (active-high), internal pull-downs on A0/A1/A2/WP for floating-pin robustness, and Power-on Reset (POR) circuitry requiring ≥100 µs delay after stable VCC before command acceptance. The device supports random/sequential reads and partial page writes without address wraparound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1,024 bits (128 × 8), nonvolatile EEPROM storage for configuration, calibration, or identity data |
| Supply voltage | 1.7V to 5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifting |
| I²C speed modes | 100 kHz (Std), 400 kHz (Fast), 1 MHz (FM+) - selectable by VCC and master timing compliance |
| Write endurance | 1,000,000 cycles - supports frequent field-updatable parameters in industrial logging or calibration systems |
| Data retention | 100 years at 55°C - ensures long-term reliability in sealed or inaccessible deployments |
| Standby current | ≤6 μA at 5.5V - minimizes power draw in battery-backed or energy-harvesting applications |
| Serial number | 128-bit factory-programmed, permanent, globally unique - eliminates need for external serialization in asset tracking or secure boot |
| Operating temp | −40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor IoT nodes |
Pinout & Package
AT24CS01-MAHM-T is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) with standard 1.27 mm pitch. Pin 1 is A0 (device address input), and the package includes exposed pad connected to GND per Microchip recommendation for thermal stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Hardware device address input | Hard-wired to GND or VCC to select one of eight possible I²C addresses (0x50–0x57); internally pulled down if floating |
| A1 | Hardware device address input | Second bit of 3-bit hardware address; enables multi-drop bus configuration with up to eight identical devices |
| A2 | Hardware device address input | Third bit of 3-bit hardware address; allows full 8-device addressing without software reconfiguration |
| GND | Power ground reference | Common return path for VCC and signal currents; must be low-impedance connection to system ground plane |
| SDA | Open-drain bidirectional data line | Requires external pull-up resistor (≤10 kΩ); supports wire-OR with other I²C slaves on same bus |
| SCL | Input clock line | Master-generated clock; rising edge latches input, falling edge outputs data; requires pull-up if not actively driven |
| WP | Hardware write-protect enable | Logic high (VCC) disables all writes to memory array; internally pulled down if left floating |
| VCC | Power supply input | Supplies core logic and EEPROM programming voltage; slew rate ≤0.1 V/µs required for reliable POR behavior |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 128-bit serial number | Permanently locked, globally unique identifier stored outside user memory - removes production-line serialization overhead |
| Multi-speed I²C interface | Supports 100/400/1000 kHz modes with voltage-dependent mode enable - simplifies migration across host controller generations |
| Hardware write protection | WP pin disables all write operations when tied to VCC - prevents accidental firmware corruption during power transients |
| Ultra-low power consumption | ≤6 μA standby current at 5.5V - extends battery life in portable medical or sensor nodes beyond 10 years |
| Robust noise immunity | Schmitt triggers + input filtering on SDA/SCL - maintains communication integrity in electrically noisy industrial environments |
| Page-write architecture | 8-byte page buffer allows partial writes without erasing adjacent bytes - improves write efficiency in parameter update scenarios |
Applications
| Asset Tracking Tag | Industrial PLC Configuration |
|---|---|
Use Scenario: Embedded in reusable logistics tags for warehouse inventory management with NFC or BLE wireless readout. IC Role / Device Role / Timing Role: Nonvolatile storage of unique tag ID, calibration offsets, and usage counters; accessed via I²C by MCU before wireless transmission. Use Value: Eliminates need for external UID generation; 128-bit serial number guarantees collision-free identification across millions of deployed units. | Use Scenario: Storing I/O mapping, PID tuning constants, and firmware revision history inside programmable logic controller modules. IC Role / Device Role / Timing Role: Configuration EEPROM interfaced to ARM Cortex-M7 host; retains settings across power cycles and firmware updates. Use Value: Hardware write protection (WP) prevents runtime corruption during EMI events; 100-year data retention ensures lifetime calibration validity. |
| Medical Sensor Calibration | Smart Meter Firmware Vault |
Use Scenario: Storing factory-calibrated gain/offset coefficients and sensor linearization tables in portable blood glucose meters. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory accessed only during sensor initialization or recalibration routines. Use Value: Unique serial number binds calibration data to specific sensor hardware, enabling traceability and anti-counterfeiting in regulated healthcare devices. | Use Scenario: Holding cryptographic keys, meter serial ID, and tariff schedule versions in utility-grade electricity meters with 20+ year field life. IC Role / Device Role / Timing Role: Trusted storage element isolated from main application processor; accessed via secure I²C session during boot or OTA update. Use Value: 1,000,000 write cycles support frequent key rotation; ultra-low standby current (<6 μA) avoids draining backup supercapacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C01D-MAHM-T | No factory-programmed serial number; identical 1-Kbit density, SOIC-8, and I²C timing specs | Lacks hardware-level device uniqueness; requires external serialization logic or software management | Select when unique ID is unnecessary and cost sensitivity outweighs traceability requirements |
| M24C01-RMN6TP | STMicroelectronics 1-Kbit EEPROM; same SOIC-8 package but no serial number; max 400 kHz I²C, 1.8–5.5V | Lower maximum speed (no FM+), no guaranteed global uniqueness; RoHS-compliant but halogen content unspecified | Choose for legacy ST-based designs where footprint compatibility is critical and serial number is managed elsewhere |
Compared with AT24CS01-MAHM-T, AT24C01D-MAHM-T offers identical memory and interface performance but omits the 128-bit serial number-making it suitable for cost-driven, non-traceable applications. M24C01-RMN6TP provides functional equivalence in footprint and density but lacks both the serial number and 1 MHz Fast Mode Plus support, limiting high-throughput configuration loading.
Availability
AT24CS01-MAHM-T is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and smart utility metering requiring stable component supply, long-term lifecycle assurance, and guaranteed factory-serialized identity.
Supply support for AT24CS01-MAHM-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 ISO 9001-certified manufacturing and global distribution.
The AT24CS01-MAHM-T belongs to Microchip's CS Series Serial EEPROM product line, designed specifically to deliver factory-assured device uniqueness alongside standard nonvolatile storage-enabling simplified asset tracking, secure boot, and regulatory-compliant device identity in industrial and medical systems.
FAQ
What is the function of the WP pin on the AT24CS01-MAHM-T?
The WP (Write-Protect) pin on the AT24CS01-MAHM-T is a hardware-controlled enable that disables all write operations to the EEPROM array when driven high (tied to VCC). When grounded, normal read/write access is permitted. If left floating, the pin is internally pulled down to GND, but Microchip recommends explicit biasing to avoid noise-induced misoperation. This feature ensures data integrity during power-up transients or EMI events in the AT24CS01-MAHM-T.
Does the AT24CS01-MAHM-T support 1 MHz I²C communication?
Yes, the AT24CS01-MAHM-T supports 1 MHz Fast Mode Plus (FM+) I²C operation-but only when VCC is between 2.5V and 5.5V. At lower supply voltages (1.7V–2.5V), it operates at up to 400 kHz (Fast mode). The AT24CS01-MAHM-T automatically adapts to the master's clock frequency within these constraints, with AC timing parameters fully specified in the datasheet for each mode.
How is the 128-bit serial number accessed on the AT24CS01-MAHM-T?
The 128-bit serial number on the AT24CS01-MAHM-T is stored in a dedicated, read-only memory block and accessed using a separate I²C device address prefix: 0xB0–0xBF (instead of the standard 0x50–0x57 used for user memory). It is factory-programmed and permanently locked-no write commands affect this region. The AT24CS01-MAHM-T returns the full 16-byte value upon sequential read starting at offset 0x00 in the serial number space.
What is the maximum write cycle time for the AT24CS01-MAHM-T?
The AT24CS01-MAHM-T has a maximum self-timed write cycle duration of 5 ms for both byte and page writes, as specified under all operating conditions (1.7V–5.5V, −40°C to +85°C). During this period, the device does not acknowledge I²C commands until the internal write completes. Acknowledge polling can be used to detect completion, avoiding fixed delays in firmware. This timing applies uniformly across the AT24CS01-MAHM-T family.
Is the AT24CS01-MAHM-T compatible with 1.8V microcontrollers?
Yes, the AT24CS01-MAHM-T is fully compatible with 1.8V microcontrollers: it operates down to 1.7V VCC, supports I²C Standard (100 kHz) and Fast (400 kHz) modes at 1.8V, and features Schmitt-triggered inputs with voltage thresholds scaled to VCC (VIH ≥ 0.7×VCC, VIL ≤ 0.3×VCC). External pull-up resistors must be sized appropriately (≤10 kΩ) for reliable bus signaling. This makes the AT24CS01-MAHM-T suitable for mixed-voltage systems.
AT24CS01-MAHM-T 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:
- 1Kbit
- Memory Organization:
- 128 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)
AT24CS01-MAHM-T FAQ
1.How can I place an order for AT24CS01-MAHM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24CS01-MAHM-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 AT24CS01-MAHM-T reliable?
The price and inventory of AT24CS01-MAHM-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24CS01-MAHM-T is usually 5 days.
3.What payment methods are accepted for AT24CS01-MAHM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24CS01-MAHM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24CS01-MAHM-T?
AT24CS01-MAHM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24CS01-MAHM-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 AT24CS01-MAHM-T?
For technical support, including AT24CS01-MAHM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24CS01-MAHM-T requirements.
6.How does Aetrix verify that AT24CS01-MAHM-T is sourced from the original manufacturer or authorized distributors?
All AT24CS01-MAHM-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 AT24CS01-MAHM-T meets industry standards.
7.What is the process for return or replacement of AT24CS01-MAHM-T?
All AT24CS01-MAHM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24CS01-MAHM-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 AT24CS01-MAHM-T part is unused and in its original packaging.
Return procedure for AT24CS01-MAHM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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