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Microchip Technology 24C02C-I/ST
- Part No.:
- 24C02C-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24C02C-I/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,409
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Product details
Overview
24C02C-I/ST from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, operating from 4.5V to 5.5V with industrial temperature range (−40°C to +85°C), 16-byte page write buffer, and hardware write-protect for upper half of array (80h–FFh). It supports 100 kHz and 400 kHz clock rates and is used in embedded system configuration storage, sensor calibration data retention, and power-fail-safe parameter backup.
For engineers reviewing the 24C02C-I/ST datasheet, 24C02C-I/ST pinout, 24C02C-I/ST application, or 24C02C-I/ST equivalent, key selection considerations include its I²C bus compatibility, 1 ms typical byte/page write time, Schmitt-trigger noise-immune inputs, WP pin-based hardware protection, and availability in 8-pin SOIC package (ST suffix).
Technical Context
The 24C02C-I/ST implements a true 2-wire I²C slave interface with bidirectional SDA and unidirectional SCL, supporting standard-mode (100 kHz) and fast-mode (400 kHz) timing. Its internal address counter enables sequential reads across the full 256-byte array with automatic rollover from FFh to 00h.
Write operations use an on-chip 16-byte page buffer with self-timed erase/write cycles; hardware write-protection is controlled solely by the WP pin state (VCC = protected, VSS = enabled). Acknowledge polling is supported to detect write completion without fixed delay timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit), enabling compact nonvolatile storage for firmware flags, device IDs, or calibration coefficients |
| Interface | I²C-compatible 2-wire serial bus, compatible with standard and fast-mode controllers without protocol translation |
| Supply voltage | 4.5V to 5.5V, matching legacy 5V logic systems and eliminating need for level-shifting circuitry |
| Write time | 1 ms typical for byte or page writes, reducing host MCU wait time and improving system responsiveness |
| Endurance | 1 million erase/write cycles, supporting frequent updates in logging or counter applications |
| Data retention | 200 years at 25°C, ensuring long-term reliability in unpowered storage scenarios |
| Temperature range | Industrial grade: −40°C to +85°C, validated for operation in factory automation, HVAC, and industrial control enclosures |
Pinout & Package
24C02C-I/ST is supplied in an 8-pin SOIC (3.90 mm) package per Microchip's DS21202J specification. Pin numbering follows standard SOIC orientation with Pin 1 at top-left corner when notch is oriented upward.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip select input | LSB of 3-bit hardware address; ties to VSS or VCC to configure one of eight possible I²C slave addresses (1010xxx) |
| A1 | Chip select input | Middle bit of 3-bit hardware address; enables cascading up to eight devices on same I²C bus |
| A2 | Chip select input | MSB of 3-bit hardware address; determines unique slave address within multi-device topology |
| VSS | Ground reference | Primary return path for all internal logic and I/O circuits; must be low-impedance connection |
| SDA | Serial data I/O | Bidirectional open-drain line requiring external pull-up; carries address, command, and data during I²C transactions |
| SCL | Serial clock input | Unidirectional master-generated clock synchronizing all data transfers; Schmitt-trigger input rejects noise |
| WP | Hardware write-protect | Active-high enable: tied to VCC locks addresses 80h–FFh; tied to VSS enables full-array writes |
| VCC | Power supply | +4.5V to +5.5V supply; internal voltage detector disables writes below ~3.8V to prevent corruption |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte page write buffer | Reduces I²C transaction overhead by allowing up to 16 bytes to be written per Stop condition, minimizing bus arbitration latency |
| Schmitt-trigger SDA/SCL inputs | Provides 0.05×VCC hysteresis to reject high-frequency noise spikes and ensure reliable edge detection on noisy PCBs |
| Output slope control | Slows SDA fall time to suppress ground bounce during switching, preventing false Start/Stop generation in dense layouts |
| Hardware write-protect (WP pin) | Physically isolates upper half (128 bytes) from accidental overwrites-no software dependency or register access required |
| ESD protection >4 kV | Enables safe handling and board-level integration without additional transient suppression components |
Applications
| Industrial Sensor Calibration Storage | Embedded System Configuration Backup |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile memory holding persistent calibration data accessed at power-on reset via I²C. Use Value: Eliminates need for recalibration after power loss; leverages 200-year data retention and 1M-cycle endurance for field-deployed units. | Use Scenario: Retaining user-configured settings (network IP, display brightness, alarm thresholds) in medical infusion pumps. IC Role / Device Role / Timing Role: I²C slave storing volatile configuration parameters that survive main power interruption. Use Value: Enables immediate resumption of operation post-power-loss using hardware write-protect to safeguard critical defaults. |
| Power-Fail Parameter Logging | Consumer Appliance State Memory |
Use Scenario: Capturing last-known operational state (motor speed, valve position) during unexpected AC mains dropout in HVAC controllers. IC Role / Device Role / Timing Role: Fast-write EEPROM interfaced to microcontroller's power-fail interrupt handler. Use Value: 1 ms write time ensures reliable capture before backup capacitors deplete; page buffer allows atomic multi-byte saves. | Use Scenario: Preserving user preferences (cook time, temperature presets) across power cycles in smart ovens. IC Role / Device Role / Timing Role: Low-power I²C EEPROM accessed during boot and shutdown sequences. Use Value: 5 μA standby current minimizes battery drain in always-on standby mode; SOIC package supports automated assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02D-SSHM-T | Same 2 Kbit capacity and I²C interface, but rated for −40°C to +125°C (automotive grade); slightly higher max write current (3 mA vs. 24C02C-I/ST's 3 mA typical) | Validated for under-hood automotive use; not qualified to industrial temp only | Select when extended temperature operation or AEC-Q100 alignment is required |
| CAT24C02WI-GT3 | Identical 2 Kbit organization and 4.5–5.5V supply, but features enhanced ESD (6 kV HBM) and tighter tWC max (10 ms vs. 1.5 ms for 24C02C-I/ST) | Targeted at high-noise industrial environments where robustness exceeds baseline requirements | Choose when system-level ESD immunity or worst-case write timing margin is critical |
Compared with AT24C02D-SSHM-T and CAT24C02WI-GT3, the 24C02C-I/ST offers optimal cost-performance balance for industrial-grade applications where −40°C to +85°C operation, 1 ms typical write time, and proven Microchip I²C compatibility are primary requirements.
Availability
24C02C-I/ST is available at Aetrix Electronics and suitable for industrial control systems, sensor modules, and consumer appliance designs requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for 24C02C-I/ST 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 products for embedded applications.
The 24C02C-I/ST belongs to Microchip's legacy I²C EEPROM product line, designed specifically for cost-sensitive, space-constrained systems needing reliable, low-power nonvolatile storage with minimal external components.
FAQ
What is the maximum I²C clock frequency supported by the 24C02C-I/ST?
The 24C02C-I/ST supports both standard-mode (100 kHz) and fast-mode (400 kHz) I²C clock frequencies. Its AC characteristics specify minimum high/low times and setup/hold requirements for reliable operation at 400 kHz, making it compatible with modern microcontrollers and SoCs without requiring clock throttling. The 24C02C-I/ST does not support high-speed mode (3.4 MHz).
How does hardware write-protection work on the 24C02C-I/ST?
Hardware write-protection on the 24C02C-I/ST is controlled exclusively by the WP pin: when tied to VCC, addresses 80h–FFh (upper 128 bytes) are locked against writes; when tied to VSS, full-array writes are permitted. This protection is active during power-up and requires no software initialization or register writes, providing fail-safe data integrity independent of firmware state.
Can multiple 24C02C-I/ST devices share the same I²C bus?
Yes, up to eight 24C02C-I/ST devices can be cascaded on a single I²C bus using the A0, A1, and A2 address pins. Each device is assigned a unique 3-bit hardware address (1010xxx), resulting in distinct 7-bit slave addresses (0xA0–0xA7). This enables contiguous 16 Kbit memory expansion without additional address decoding logic.
What is the typical write cycle time for the 24C02C-I/ST, and how is it managed?
The 24C02C-I/ST has a typical write cycle time of 1 ms for both byte and page writes, with a maximum of 1.5 ms. During this self-timed internal cycle, the device does not acknowledge I²C commands. Host systems use acknowledge polling-repeatedly sending the write control byte until an ACK is received-to detect completion without fixed delays, optimizing bus utilization.
Is the 24C02C-I/ST compatible with 3.3V I²C systems?
No, the 24C02C-I/ST is specified only for 4.5V to 5.5V operation and is not 3.3V tolerant. Its VIH minimum is 0.7×VCC (≥3.15V at VCC=4.5V), and VIL maximum is 0.3×VCC (≤1.65V), making direct connection to 3.3V I²C buses unsafe without level translation. For 3.3V systems, consider Microchip's 24AA02E48 or compatible 2.5–5.5V EEPROMs.
24C02C-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 1ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24C02C-I/ST FAQ
1.How can I place an order for 24C02C-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24C02C-I/ST 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 24C02C-I/ST reliable?
The price and inventory of 24C02C-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24C02C-I/ST is usually 5 days.
3.What payment methods are accepted for 24C02C-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24C02C-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24C02C-I/ST?
24C02C-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24C02C-I/ST 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 24C02C-I/ST?
For technical support, including 24C02C-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24C02C-I/ST requirements.
6.How does Aetrix verify that 24C02C-I/ST is sourced from the original manufacturer or authorized distributors?
All 24C02C-I/ST 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 24C02C-I/ST meets industry standards.
7.What is the process for return or replacement of 24C02C-I/ST?
All 24C02C-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24C02C-I/ST, 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 24C02C-I/ST part is unused and in its original packaging.
Return procedure for 24C02C-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24C02C-I/ST Tags
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AT24C02C-XHM-T
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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