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Microchip Technology 24C02CT/SN
- Part No.:
- 24C02CT/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24C02CT/SN.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,475
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Product details
Overview
24C02CT/SN 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 1 mA max read current, 5 μA max standby current, and 1 ms typical byte/page write time. It features hardware write-protection for upper half (80h–FFh), Schmitt-trigger inputs, and supports up to eight devices on one bus in industrial temperature range (−40°C to +85°C).
For engineers reviewing the 24C02CT/SN datasheet, 24C02CT/SN pinout, 24C02CT/SN application, or 24C02CT/SN equivalent, this page delivers verified electrical specs, validated I²C timing compliance (100/400 kHz), confirmed 8-pin SOIC package mapping, real-world noise suppression behavior, and accurate hardware write-protect implementation details.
Technical Context
The 24C02CT/SN implements a true 2-wire I²C slave interface with fixed 7-bit address prefix '1010', where A2–A0 pins select among eight possible device addresses. Its internal architecture includes a 16-byte page buffer, self-timed erase/write cycle, and voltage threshold detector disabling write logic below 3.8 V.
Schmitt-trigger inputs on SDA and SCL provide 0.05 VCC hysteresis, while output slope control limits ground bounce. The device supports ACK polling during write cycles and enforces strict I²C bus protocol-including Start/Stop detection, data validity windows, and acknowledge timing-per Table 1-2 AC characteristics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit), enabling compact nonvolatile storage for calibration data or configuration registers |
| Supply voltage | 4.5V to 5.5V - compatible with standard 5V logic systems without level shifting |
| Write time | 1 ms typical (byte or page) - enables fast firmware updates without blocking host CPU for extended periods |
| I²C speed | 100 kHz / 400 kHz - supports both legacy and high-speed system buses with no external clock source required |
| Endurance | 1,000,000 erase/write cycles - suitable for applications requiring frequent parameter logging or field-updatable settings |
| Data retention | 200 years - ensures long-term reliability in unpowered storage of critical configuration or security keys |
| Write protection | Hardware-enabled via WP pin tied to VCC - prevents accidental overwrites of upper 128 bytes (addresses 80h–FFh) |
Pinout & Package
24C02CT/SN is supplied in an 8-pin SOIC (3.90 mm) package per Microchip's DS21202J-page 1, with pin 1 marked by notch or dot. All variants share identical pin mapping and electrical pin functions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip select input | LSB of 3-bit device address; sets bit A0 in control byte '1010 A2 A1 A0 R/W' - enables multi-device bus addressing |
| A1 | Chip select input | Middle bit of device address; allows up to eight 24C02CT/SN units on same I²C bus without address conflict |
| A2 | Chip select input | MSB of device address; combined with A0/A1, selects one of eight unique slave addresses (1010xxx0/1) |
| VSS | Ground reference | Return path for all internal logic and I/O; must be low-impedance connection to avoid noise coupling into SDA/SCL |
| SDA | Bidirectional data line | Open-drain I²C data bus; requires external pull-up (2 kΩ for 400 kHz, 10 kΩ for 100 kHz); changes only during SCL low |
| SCL | Clock input | Master-generated I²C clock; rising edge samples data, falling edge allows data change; Schmitt-triggered for noise immunity |
| WP | Hardware write-protect | Active-high enable: tie to VCC to lock upper half (80h–FFh); tie to VSS for full write access - no software overhead |
| VCC | Power supply | +4.5V to +5.5V input; internal voltage detector disables writes below ~3.8V to prevent corrupted programming |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte page write buffer | Reduces I²C transaction count by up to 16× versus byte writes - cuts bus occupancy and host firmware latency |
| Schmitt-trigger SDA/SCL inputs | 0.05 VCC hysteresis eliminates false triggering from EMI or slow-rising edges - improves robustness in noisy industrial environments |
| ACK polling support | Enables host to detect write completion without fixed delays - maximizes I²C bus throughput and avoids unnecessary wait states |
| Hardware write-protect (WP) | Physically blocks writes to upper 128 bytes without firmware involvement - prevents corruption of boot-critical or security parameters |
| ESD protection | >4,000 V HBM - withstands handling and board-level transients without latch-up or parametric shift |
Applications
| Industrial Sensor Calibration | Consumer Appliance Configuration |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and temperature compensation tables in HVAC controllers or pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed at power-on reset via I²C; retains values across 200+ year lifetime. Use Value: Eliminates need for external trimming components or re-calibration after power loss - reduces BOM cost and field service requirements. |
Use Scenario: Saving user preferences (e.g., cooking mode, timer settings, display brightness) in microwave ovens or washing machines. IC Role / Device Role / Timing Role: Low-power I²C slave storing persistent state between AC cycles; draws only 5 μA in standby. Use Value: Enables instant resume functionality without battery backup - lowers system power budget and simplifies mechanical design. |
| Medical Device Settings | Automotive Body Control Module |
Use Scenario: Retaining clinician-configured alarm thresholds and operational modes in portable infusion pumps or patient monitors. IC Role / Device Role / Timing Role: Secure, write-protected storage for safety-critical parameters; WP pin locks upper half containing firmware update flags. Use Value: Meets IEC 62304 traceability requirements by preventing accidental overwrite of validated configuration data. |
Use Scenario: Storing seat position memory, mirror angle presets, and lighting profiles in automotive door modules. IC Role / Device Role / Timing Role: Industrial-temp-rated EEPROM interfacing directly with MCU I²C peripheral; operates reliably from −40°C to +85°C. Use Value: Supports ASAM-compliant diagnostics and UDS read/write services without external level shifters or voltage translators. |
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, 1.7–5.5 V supply, but uses different I²C address scheme (1010xxx) and lacks hardware WP pin | No dedicated write-protect pin - requires software-based locking or external logic for protected regions | Select when wider voltage range (1.7V) or AEC-Q200 qualification is required; verify address compatibility in multi-device systems |
| BR24G02NUX-10 | 2 Kbit, 1.6–5.5 V, built-in write-protect register (not pin-controlled), and 1 MHz I²C support | Software-configurable protection zones vs. hardware-fixed upper-half lock - offers finer granularity but adds register access overhead | Prefer for designs needing dynamic protection control or higher-speed I²C; confirm BR24G02NUX-10's 1.6V min operation aligns with system rail stability |
Compared with AT24C02D-SSHM-T and BR24G02NUX-10, the 24C02CT/SN provides deterministic hardware write protection with zero firmware intervention, guaranteed 4.5–5.5 V operation matching legacy 5V systems, and proven interoperability with standard I²C masters - making it optimal for cost-sensitive, safety-aware industrial designs.
Availability
24C02CT/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance configuration, medical device settings, and automotive body control module applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for 24C02CT/SN 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 leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24C02CT/SN belongs to Microchip's legacy 24Cxx I²C EEPROM product line, designed specifically for reliable, low-power nonvolatile data storage in space-constrained embedded systems across industrial, medical, and consumer markets.
FAQ
What is the operating voltage range of the 24C02CT/SN?
The 24C02CT/SN operates from 4.5V to 5.5V DC. This narrow range ensures compatibility with standard 5V logic families and eliminates the need for voltage translation in legacy 5V systems. Operation outside this range - including below 4.5V - may cause unreliable write cycles or data corruption due to internal voltage detector activation.
How does the hardware write-protect function work on the 24C02CT/SN?
The 24C02CT/SN uses the WP pin for hardware write protection: when tied to VCC, writes to memory addresses 80h–FFh (upper 128 bytes) are blocked; when tied to VSS, full write access is enabled. This protection is active regardless of I²C command - no software interaction is required, ensuring fail-safe prevention of accidental overwrites.
What package type is used for the 24C02CT/SN?
The 24C02CT/SN is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) with 3.90 mm body width, as confirmed in Microchip's DS21202J datasheet Figure 2-1 and Package Marking Information section. Pin 1 is identified by a notch or dot, and the package is Pb-free and RoHS compliant.
Can multiple 24C02CT/SN devices share the same I²C bus?
Yes - up to eight 24C02CT/SN devices can operate on a single I²C bus using unique slave addresses generated by combinations of A0, A1, and A2 pins. Each device responds only to its assigned 7-bit address (1010xxx), enabling scalable memory expansion up to 16 Kbits without additional address decoding logic.
What is the maximum I²C clock frequency supported by the 24C02CT/SN?
The 24C02CT/SN supports I²C clock frequencies up to 400 kHz under industrial temperature conditions (−40°C to +85°C), as specified in Table 1-2 AC Characteristics. At 100 kHz, it meets standard-mode timing; at 400 kHz, it complies with fast-mode requirements - both without external clock sources or configuration registers.
24C02CT/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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:
- 1.5ms
- Access Time:
- 3.5 µs
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24C02CT/SN FAQ
1.How can I place an order for 24C02CT/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24C02CT/SN 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 24C02CT/SN reliable?
The price and inventory of 24C02CT/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24C02CT/SN is usually 5 days.
3.What payment methods are accepted for 24C02CT/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24C02CT/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24C02CT/SN?
24C02CT/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24C02CT/SN 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 24C02CT/SN?
For technical support, including 24C02CT/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24C02CT/SN requirements.
6.How does Aetrix verify that 24C02CT/SN is sourced from the original manufacturer or authorized distributors?
All 24C02CT/SN 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 24C02CT/SN meets industry standards.
7.What is the process for return or replacement of 24C02CT/SN?
All 24C02CT/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24C02CT/SN, 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 24C02CT/SN part is unused and in its original packaging.
Return procedure for 24C02CT/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24C02CT/SN Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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