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Microchip Technology AT24CM02-SSHM-B
- Part No.:
- AT24CM02-SSHM-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24CM02-SSHM-B.pdf
- Description:
- IC EEPROM 2MBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,639
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Product details
Overview
AT24CM02-SSHM-B from Microchip Technology is a 2-Mbit I²C-compatible serial EEPROM organized as 262,144 × 8 bits, operating from 1.7V to 5.5V with industrial temperature range (−40°C to +85°C), 1 MHz Fast Mode Plus support, and hardware write-protection via WP pin - used for nonvolatile configuration storage in embedded controllers and sensor nodes.
For engineers reviewing the AT24CM02-SSHM-B datasheet, AT24CM02-SSHM-B pinout, AT24CM02-SSHM-B application, or AT24CM02-SSHM-B equivalent, key selection criteria include voltage-grade compatibility (1.7V–5.5V), page-write timing (≤10 ms), endurance (1M cycles), data retention (100 years), and SOIC-8 package pinout with A2 address input and open-drain SDA/SCL interface.
Technical Context
The AT24CM02-SSHM-B implements a two-wire I²C interface with Schmitt-trigger inputs and integrated noise filtering, supporting Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) clock rates depending on VCC level. It uses an internal high-voltage generation circuit for EEPROM programming and includes Power-on Reset (POR) with 100 µs tPUP delay before command acceptance.
Memory is partitioned into 1,024 pages of 256 bytes each, enabling byte and partial-page writes. Device addressing uses a fixed 4-bit identifier (1010b) plus hardware-configurable A2 pin and upper address bits A17/A16, allowing up to four devices on one bus via cascading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Mbit (262,144 × 8), directly usable for firmware parameter tables or calibration data storage |
| Interface | I²C two-wire (SDA/SCL), open-drain with external pull-ups - compatible with standard microcontroller I²C peripherals |
| Supply Voltage | 1.7V–5.5V (low-voltage grade), enabling direct interface with 1.8V/3.3V/5V systems without level shifters |
| Write Speed | ≤10 ms self-timed write cycle per page - eliminates need for polling or timeout management in host firmware |
| Endurance | 1,000,000 write cycles - supports frequent logging or runtime configuration updates over product lifetime |
| Data Retention | 100 years at 55°C - ensures long-term reliability in unattended industrial deployments |
| Standby Current | ≤3 µA max - critical for battery-powered IoT edge nodes requiring multi-year operation |
| Operating Temp | −40°C to +85°C industrial grade - validated for use in automotive body control modules and factory automation PLCs |
Pinout & Package
AT24CM02-SSHM-B is supplied in an 8-lead SOIC package (SSHM-B suffix denotes SOIC narrow 150-mil). Pin functions are electrically identical across SOIC and WLCSP variants, with NC pins unused and A2/WP internally pulled down when floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A2 | Device Address Input | Hardware-selectable LSB of device address (0 or 1); enables up to two AT24CM02-SSHM-B devices on same I²C bus |
| GND | Ground Reference | System ground return path; must be low-impedance connection to minimize noise coupling into SDA/SCL |
| SDA | Serial Data I/O | Open-drain bidirectional line - requires external pull-up resistor (≤10 kΩ); shared across multiple I²C slaves |
| SCL | Serial Clock Input | Host-generated clock; rising edge latches input, falling edge outputs data - must be pulled high when idle |
| WP | Write-Protect Control | Active-high hardware lock: tied to VCC disables all writes to full memory array; tied to GND enables normal operation |
| VCC | Power Supply | 1.7V–5.5V supply input; includes internal POR circuit - host must wait ≥100 µs after VCC stabilization before first command |
| NC (Pin 1 & 2) | No Connect | Unbonded die pads; must remain unconnected - no routing or termination required |
Key Features
| Feature | Design Value |
|---|---|
| FM+ Support (1 MHz) | Enables faster configuration loading in time-critical applications like real-time motor control startup sequences |
| Built-in Error Detection | Hardware-level ECC improves data integrity during power-loss events without host-side software overhead |
| 256-byte Page Write | Reduces write latency vs. byte-by-byte: 256 bytes written in ≤10 ms instead of 256 × 10 ms |
| Schmitt Trigger Inputs | Rejects bus noise up to 100 ns spikes - eliminates false Start/Stop detection in electrically noisy industrial environments |
| Green Packaging | RoHS-compliant, halide-free SOIC package meets IPC/JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during system boot; read-only during runtime unless recalibration triggered. Use Value: Enables field-replaceable sensor modules with unique calibration data retained across 100-year lifetime without backup battery. | Use Scenario: Holding user-defined therapy parameters and safety limits in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, write-protected storage for regulatory-critical settings; WP pin hardwired to VCC prevents accidental overwrite. Use Value: Meets IEC 62304 Class C software requirements by guaranteeing immutable safety thresholds under all power conditions. |
| Automotive Body Control | Smart Energy Metering |
Use Scenario: Saving seat/mirror position memory and lighting profiles in vehicle door modules. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced to 3.3V CAN/LIN microcontroller; accessed only during ignition-on initialization. Use Value: 3 µA standby current extends battery drain life beyond ISO 16750-2 quiescent current limits for parked vehicle scenarios. | Use Scenario: Recording tariff schedules, demand-response events, and meter firmware version in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: High-endurance storage for time-stamped utility data logged every 15 minutes across 20+ year service life. Use Value: 1M write cycles support >54 years of continuous 15-minute logging - exceeding ANSI C12.20 lifetime requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C256B-SSHL-T | 1.8V–5.5V only; no 1.7V support; 256 Kbit (32K × 8); FM+ not supported (max 400 kHz) | Limited to higher-VCC systems; insufficient density for large configuration sets | Select when cost sensitivity outweighs voltage flexibility and density needs |
| M95M02-DFMN6TP | 2-Mbit SPI interface (not I²C); 1.8V–5.5V; 40 MHz clock; no WP pin - uses software protection | Requires SPI-capable MCU; incompatible with existing I²C bus architecture | Choose only if migrating from I²C to SPI for higher throughput and lower pin count |
Compared with AT24CM02-SSHM-B, the AT24C256B-SSHL-T offers lower cost but sacrifices 1.7V operation and density, while the M95M02-DFMN6TP provides faster access via SPI but mandates hardware and firmware redesign - making AT24CM02-SSHM-B optimal for I²C-based industrial designs needing wide voltage range and guaranteed 100-year data retention.
Availability
AT24CM02-SSHM-B is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control applications requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT24CM02-SSHM-B 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 AT24CM02-SSHM-B belongs to Microchip's AT24Cxx family of I²C EEPROMs, designed specifically for robust, low-power nonvolatile storage in harsh industrial and automotive environments where voltage tolerance and data integrity are critical.
FAQ
What is the maximum clock frequency supported by the AT24CM02-SSHM-B?
The AT24CM02-SSHM-B supports 100 kHz (Standard Mode), 400 kHz (Fast Mode), and 1 MHz (Fast Mode Plus) I²C clock frequencies. FM+ operation requires VCC ≥ 2.5V; below that, it operates at up to 400 kHz with VCC ≥ 1.7V. This allows designers to select speed based on system voltage and noise constraints without changing firmware.
Does the AT24CM02-SSHM-B require external pull-up resistors on SDA and SCL lines?
Yes, the AT24CM02-SSHM-B requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is an input. Microchip specifies maximum values of 10 kΩ for SDA and recommends 1.3 kΩ for 1 MHz operation, 4 kΩ for 400 kHz, and 10 kΩ for 100 kHz - ensuring reliable rise times across all supported modes.
How does the write-protect (WP) pin function on the AT24CM02-SSHM-B?
On the AT24CM02-SSHM-B, the WP pin is active-high: when tied to VCC, it inhibits all write operations to the entire memory array; when tied to GND, normal write functionality is enabled. If left floating, the pin is internally pulled down to GND, but Microchip recommends hardwiring it to avoid noise-induced glitches in industrial environments.
What is the memory organization of the AT24CM02-SSHM-B?
The AT24CM02-SSHM-B organizes its 2-Mbit capacity as 262,144 words × 8 bits, segmented into 1,024 pages of 256 bytes each. This structure enables efficient page writes (up to 256 bytes per ≤10 ms cycle) and supports random or sequential reads - ideal for storing modular firmware configurations or sensor calibration tables.
Is the AT24CM02-SSHM-B compatible with legacy AT24Cxx I²C EEPROM software drivers?
Yes, the AT24CM02-SSHM-B maintains full software compatibility with standard AT24Cxx drivers: it uses the same 7-bit base address (0x50–0x57), identical Start/Stop/ACK protocols, and supports byte and page write commands. No driver modifications are needed - only voltage and timing margin validation for FM+ mode if upgrading from older 400 kHz implementations.
AT24CM02-SSHM-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- 450 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24CM02-SSHM-B FAQ
1.How can I place an order for AT24CM02-SSHM-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24CM02-SSHM-B 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 AT24CM02-SSHM-B reliable?
The price and inventory of AT24CM02-SSHM-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24CM02-SSHM-B is usually 5 days.
3.What payment methods are accepted for AT24CM02-SSHM-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24CM02-SSHM-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24CM02-SSHM-B?
AT24CM02-SSHM-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24CM02-SSHM-B 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 AT24CM02-SSHM-B?
For technical support, including AT24CM02-SSHM-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24CM02-SSHM-B requirements.
6.How does Aetrix verify that AT24CM02-SSHM-B is sourced from the original manufacturer or authorized distributors?
All AT24CM02-SSHM-B 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 AT24CM02-SSHM-B meets industry standards.
7.What is the process for return or replacement of AT24CM02-SSHM-B?
All AT24CM02-SSHM-B units undergo pre-shipment inspection (PSI). If there is an issue with AT24CM02-SSHM-B, 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 AT24CM02-SSHM-B part is unused and in its original packaging.
Return procedure for AT24CM02-SSHM-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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