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Microchip Technology 24C02C/SN
- Part No.:
- 24C02C/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24C02C/SN.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,393
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Product details
Overview
24C02C 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 and 5 μA max standby current. It supports 100 kHz/400 kHz clock rates, features hardware write-protection for upper half (80h–FFh), and delivers 1 ms typical byte/page write time for embedded system configuration storage.
For engineers reviewing the 24C02C datasheet, 24C02C pinout, 24C02C application, or 24C02C equivalent, this page provides verified pin functions, industrial/automotive temperature grade support, Schmitt-trigger noise immunity, page buffer architecture, and real-world endurance (1M cycles) and data retention (>200 years) specifications.
Technical Context
The 24C02C 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 pointer enables sequential, random, and current-address read operations without external address latching.
Hardware write protection is controlled solely by the WP pin state (VCC = protected, VSS = enabled), independent of software commands. The device uses Schmitt-trigger inputs on SDA/SCL and input filtering (50 ns spike suppression) to ensure robust operation in electrically noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit), enabling compact nonvolatile storage for calibration data or device IDs |
| Supply voltage | 4.5V to 5.5V - compatible with standard 5V logic systems without level shifting |
| Write cycle time | 1 ms typical (byte or page) - enables rapid firmware parameter updates during runtime |
| Endurance | 1,000,000 erase/write cycles - supports frequent logging or configuration changes over product lifetime |
| Data retention | >200 years at +25°C - ensures long-term reliability in unpowered storage applications |
| I²C clock rate | 100 kHz / 400 kHz - selectable via master controller for bandwidth vs. noise immunity trade-off |
| Page buffer size | 16 bytes - allows efficient burst writes within a single page boundary (00h–0Fh, 10h–1Fh, etc.) |
| Operating temp | Industrial: –40°C to +85°C; Automotive: –40°C to +125°C - validated for harsh-environment deployment |
Pinout & Package
24C02C is available in multiple 8-pin surface-mount and through-hole packages including SOIC, TSSOP, MSOP, DFN, TDFN, and PDIP. All variants share identical pin mapping and electrical behavior.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Chip select address inputs | Enable up to eight devices on one I²C bus; must be hardwired to VCC or VSS - no floating allowed |
| VSS | Ground reference | Common return path for all internal circuitry; requires low-impedance connection to system ground plane |
| SDA | Serial data I/O | Open-drain bidirectional line requiring external pull-up resistor (2 kΩ for 400 kHz, 10 kΩ for 100 kHz) |
| SCL | Serial clock input | Master-generated clock synchronizing all data transfers; includes Schmitt trigger for noise rejection |
| WP | Hardware write-protect control | Active-high protection: tied to VCC disables writes to addresses 80h–FFh; tied to VSS enables full array access |
| VCC | Power supply | 4.5V–5.5V input with internal VCC threshold detector disabling 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 per STOP-initiated write cycle |
| Schmitt-trigger SDA/SCL inputs | Provides 0.05×VCC hysteresis and 50 ns spike suppression - eliminates false triggering on noisy PCBs |
| Self-timed erase/write cycle | Removes need for external timing control; master uses ACK polling to detect completion |
| Hardware write protection | Physically blocks writes to upper 1Kbit (80h–FFh) when WP = VCC - immune to software faults or malware |
| Cascadable architecture | Three address pins (A0–A2) allow eight 24C02C devices to form contiguous 16 Kbit memory space |
| ESD protection | >4,000 V HBM - meets industrial handling requirements without additional protection circuitry |
Applications
| Smart Meter Calibration Storage | Industrial PLC Configuration Backup |
|---|---|
|
Use Scenario: Storing meter-specific calibration coefficients and tariff tables that persist across power loss. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding factory-trimmed ADC gain/offset values and utility-defined billing parameters. Use Value: Enables field-replaceable meter modules without recalibration; leverages 1M-cycle endurance for daily firmware updates. |
Use Scenario: Retaining ladder logic configuration, I/O mapping, and alarm thresholds after unexpected shutdown. IC Role / Device Role / Timing Role: System-level parameter store accessed during boot to restore operational state before real-time control resumes. Use Value: Guarantees deterministic startup behavior; hardware WP prevents accidental overwrite during debug sessions. |
| Automotive Body Control Module | Medical Device Usage Logging |
|
Use Scenario: Recording seat position memory, mirror presets, and lighting profiles for driver personalization. IC Role / Device Role / Timing Role: Automotive-grade (–40°C to +125°C) persistent memory interfaced via I²C to microcontroller's peripheral bus. Use Value: Meets AEC-Q100 stress requirements; >200-year data retention ensures lifetime validity without battery backup. |
Use Scenario: Logging sterilization cycles, usage counts, and maintenance timestamps in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant audit trail storage where WP pin is permanently tied to VCC to lock historical records. Use Value: Provides FDA-compliant immutable event history; 1 ms write time enables logging mid-procedure without interrupting operation. |
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 (Microchip) | Newer revision with enhanced ESD rating (6 kV HBM) and extended voltage range (1.7V–5.5V); same pinout and command set | Supports single-supply battery-powered designs down to 1.7V; retains identical 2 Kbit capacity and I²C timing | Select when designing for mixed-voltage systems or requiring higher ESD robustness without layout change |
| ST24C02-WDT6-TR (STMicroelectronics) | Identical 2 Kbit organization and 4.5V–5.5V operation but with different AC timing specs (e.g., 3.5 μs tAA) and no built-in WP pin | Requires external GPIO or logic to emulate hardware write protection; lacks integrated Schmitt triggers on SDA/SCL | Choose only if existing ST ecosystem mandates compatibility; verify timing margins and add external noise filtering |
Compared with AT24C02D-SSHM-T, the 24C02C offers proven industrial deployment but lacks ultra-low-voltage support; versus ST24C02-WDT6-TR, it provides superior noise immunity and simpler hardware protection - critical for medical and automotive use cases.
Availability
24C02C is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, automotive body control modules, and medical device logging requiring stable component supply across extended product lifecycles.
Supply support for 24C02C 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 24C02C belongs to Microchip's legacy I²C EEPROM product line, designed specifically for cost-sensitive, high-reliability embedded systems requiring simple, robust nonvolatile storage without complex initialization sequences.
FAQ
What is the maximum I²C clock frequency supported by the 24C02C?
The 24C02C supports both standard-mode (100 kHz) and fast-mode (400 kHz) I²C operation. Its AC characteristics specify minimum high/low clock times and setup/hold requirements for each mode, with timing validated across industrial (–40°C to +85°C) and automotive (–40°C to +125°C) temperature ranges. The 24C02C does not support fast-mode plus (1 MHz) or high-speed mode.
How does hardware write protection work on the 24C02C?
Hardware write protection on the 24C02C is controlled exclusively by the WP pin: when tied to VCC, writes to memory addresses 80h–FFh (upper 1Kbit) are blocked; when tied to VSS, full array access is permitted. This protection is active regardless of I²C command sequence and cannot be overridden by software - ensuring physical security against accidental or malicious overwrite.
Can multiple 24C02C devices share the same I²C bus?
Yes, up to eight 24C02C 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 when its three address bits match the corresponding bits in the master's control byte (1010 A2 A1 A0 R/W). This enables scalable memory expansion up to 16 Kbit without additional address decoding logic.
What is the purpose of the 16-byte page buffer in the 24C02C?
The 16-byte page buffer in the 24C02C allows up to 16 bytes to be loaded into an internal latch before initiating a self-timed write cycle. This reduces I²C bus occupancy compared to individual byte writes and improves throughput when storing contiguous data - such as sensor calibration tables or firmware version strings - provided all bytes reside within the same 16-byte page boundary (e.g., 00h–0Fh).
Does the 24C02C require external pull-up resistors on SDA and SCL lines?
Yes, the 24C02C requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is a passive input. Recommended values are 10 kΩ for 100 kHz operation and 2 kΩ for 400 kHz, sized to meet rise-time specifications (≤1000 ns for standard mode, ≤300 ns for fast mode) while accounting for bus capacitance and number of devices.
24C02C/SN 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:
- 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
24C02C/SN FAQ
1.How can I place an order for 24C02C/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24C02C/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 24C02C/SN reliable?
The price and inventory of 24C02C/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24C02C/SN is usually 5 days.
3.What payment methods are accepted for 24C02C/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24C02C/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24C02C/SN?
24C02C/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24C02C/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 24C02C/SN?
For technical support, including 24C02C/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24C02C/SN requirements.
6.How does Aetrix verify that 24C02C/SN is sourced from the original manufacturer or authorized distributors?
All 24C02C/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 24C02C/SN meets industry standards.
7.What is the process for return or replacement of 24C02C/SN?
All 24C02C/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24C02C/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 24C02C/SN part is unused and in its original packaging.
Return procedure for 24C02C/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24C02C/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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