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Microchip Technology 24C01CT-E/SN
- Part No.:
- 24C01CT-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24C01CT-E/SN.pdf
- Description:
- IC EEPROM 1KBIT I2C 100KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,375
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Product details
Overview
24C01CT-E/SN from Microchip Technology Inc. is a 1 Kbit (128 × 8) I²C-compatible serial EEPROM with automotive-grade temperature range (−40°C to +125°C), 4.5V–5.5V supply, and 16-byte page write buffer. It supports up to 400 kHz clock rate, features Schmitt-trigger inputs for noise immunity, and delivers ≤5 µA standby current. Used for nonvolatile parameter storage in engine control units, sensor calibration modules, and automotive infotainment configuration memory.
For engineers reviewing the 24C01CT-E/SN datasheet, 24C01CT-E/SN pinout, 24C01CT-E/SN application, or 24C01CT-E/SN equivalent, key selection criteria include automotive temperature compliance, I²C bus compatibility up to 400 kHz, 16-byte page write capability, low-power operation, and factory-programmable options for secure boot configuration.
Technical Context
The 24C01CT-E/SN implements a standard two-wire I²C slave interface with fixed 7-bit address prefix '1010' and three programmable chip-select bits (A0–A2). It uses internal high-voltage generation for EEPROM write/erase and includes a self-timed write cycle with automatic erase-before-write logic.
Its architecture integrates Schmitt-trigger inputs on SDA/SCL with 50 ns spike suppression and hysteresis ≥0.05×VCC, plus output slope control to limit ground bounce. The device supports acknowledge polling to detect write completion without fixed delay timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit organization), enabling compact firmware parameter storage |
| Supply voltage | 4.5 V to 5.5 V - compatible with standard 5 V automotive power rails |
| Temperature grade | Automotive (E): −40°C to +125°C - qualified for under-hood and powertrain applications |
| I²C clock rate | Up to 400 kHz - supports faster configuration writes vs. legacy 100 kHz EEPROMs |
| Page write buffer | 16 bytes - reduces bus transactions by 16× vs. byte-write for contiguous data |
| Write endurance | 1 million erase/write cycles - sufficient for lifetime logging in telematics modules |
| Data retention | 200 years at +25°C - ensures long-term calibration stability across vehicle lifecycle |
Pinout & Package
24C01CT-E/SN is packaged in an 8-lead SOIC (3.90 mm) with Pb-free, RoHS-compliant finish. Pin 1 is marked by laser; package meets JEDEC MS-012AA standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip select input | LSB of 3-bit hardware address; sets device ID when multiple EEPROMs share I²C bus |
| A1 | Chip select input | Middle bit of hardware address; enables up to eight devices on same bus (except SOT-23) |
| A2 | Chip select input | MSB of hardware address; tied high/low to configure unique I²C slave address |
| VSS | Ground reference | Return path for all internal logic and I/O; must be low-impedance connection to minimize noise coupling |
| SDA | Serial data bidirectional line | Open-drain I²C data line requiring external pull-up; transmits addresses, commands, and data |
| SCL | Serial clock input | Master-generated clock synchronizing all I²C transfers; edge-sensitive timing critical for ACK/NACK |
| Test | Factory test terminal | No functional role in application; may be left floating, tied high, or tied low per board layout constraints |
| VCC | Power supply input | 4.5–5.5 V supply; internal voltage detector disables writes below ~3.8 V to prevent corruption |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs on SDA/SCL | Enables reliable operation on noisy automotive buses with >50 ns spike suppression and ≥0.05×VCC hysteresis |
| Page write capability | 16-byte buffer allows single I²C transaction to store full calibration record, reducing bus arbitration overhead |
| Self-timed write cycle | Eliminates need for external timeout logic; internal 1 ms max write time ensures deterministic recovery |
| ESD protection | ≥4 kV HBM rating protects against handling damage during assembly and field service |
| Address cascading | Three hardware address pins support up to eight devices on one I²C bus, expanding total EEPROM capacity to 8 Kbit |
Applications
| Engine Control Unit (ECU) Calibration Storage | Automotive Sensor Module Configuration |
|---|---|
Use Scenario: Storing trim values, fault codes, and adaptive learning parameters in gasoline/diesel ECUs subject to thermal cycling and vibration. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via I²C during power-up and runtime diagnostics. Use Value: Automotive temperature rating ensures reliability across −40°C cold cranking to +125°C under-hood operation; 1 million endurance supports lifetime recalibration. | Use Scenario: Holding factory-set offset/gain coefficients and diagnostic thresholds in wheel speed, pressure, or temperature sensors. IC Role / Device Role / Timing Role: I²C slave providing persistent parameter storage accessible during sensor initialization and self-test sequences. Use Value: 16-byte page write minimizes I²C bus occupancy during sensor commissioning; Schmitt-trigger inputs reject EMI from adjacent motor drivers. |
| Infotainment System User Preference Memory | Body Control Module (BCM) Configuration |
Use Scenario: Retaining radio presets, display brightness settings, and seat/mirror positions across ignition cycles in head units and display clusters. IC Role / Device Role / Timing Role: Low-power I²C EEPROM storing user-configurable state between system sleep and wake events. Use Value: 5 µA standby current extends battery life during vehicle off-state; 200-year data retention prevents loss of preferences over vehicle lifetime. | Use Scenario: Managing door lock logic, lighting profiles, and window auto-up/down settings in centralized BCMs. IC Role / Device Role / Timing Role: Serial configuration memory interfaced to microcontroller I²C peripheral for runtime parameter access. Use Value: Cascadable addressing allows shared I²C bus with other peripherals (e.g., CAN transceivers, LIN slaves); RoHS/Pb-free compliance meets automotive environmental mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C01D-SSHM-T | 1 Kbit I²C EEPROM, 1.7–5.5 V supply, industrial temp (−40°C to +85°C), 16-byte page write | Lacks automotive temperature qualification; lower VCC min enables single-supply 3.3 V systems | Select for cost-sensitive industrial or consumer designs where extended temperature is not required |
| BR24G01FJ-WE2 | 1 Kbit I²C EEPROM, 1.6–5.5 V supply, automotive temp (−40°C to +125°C), 16-byte page write, built-in write protect | Includes software write protection register; identical pinout but different marking and packaging | Choose when enhanced data integrity via configurable write lock is needed alongside automotive qualification |
Compared with AT24C01D-SSHM-T and BR24G01FJ-WE2, the 24C01CT-E/SN provides guaranteed automotive temperature operation and Microchip's established qualification pedigree, while offering identical 16-byte page write performance and I²C timing compatibility-making it optimal for legacy automotive platforms requiring drop-in replacement assurance.
Availability
24C01CT-E/SN is available at Aetrix Electronics and suitable for automotive electronics, engine management systems, and body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 24C01CT-E/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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory products for embedded control applications.
The 24C01CT-E/SN belongs to Microchip's legacy 24Cxx I²C EEPROM family, designed specifically for automotive and industrial systems requiring robust, low-power, nonvolatile data storage with proven qualification and long-term supply commitment.
FAQ
What is the maximum I²C clock frequency supported by the 24C01CT-E/SN?
The 24C01CT-E/SN supports I²C clock frequencies up to 400 kHz under automotive temperature conditions (−40°C to +125°C). This is confirmed in Table 1-2 AC Characteristics of the DS21201K datasheet, where FCLK max is specified as 400 kHz for E-temp operation. The device also maintains full compatibility with standard 100 kHz I²C buses, ensuring backward interoperability with legacy controllers.
Does the 24C01CT-E/SN include hardware write protection?
The 24C01CT-E/SN does not integrate hardware write protection via a dedicated WP pin. Its datasheet (DS21201K, page 5) lists only A0–A2, VSS, SDA, SCL, Test, and VCC pins - no WP terminal. Write protection must be implemented externally (e.g., via GPIO-controlled MOSFET on VCC or SDA line) or through software-based address locking if supported by host firmware.
How many 24C01CT-E/SN devices can be connected on a single I²C bus?
Up to eight 24C01CT-E/SN devices can be connected on a single I²C bus using unique combinations of A0, A1, and A2 pins. As stated in the "Description" section (DS21201K, page 1) and Section 5.0, these three chip-select inputs define the three LSBs of the 7-bit slave address, enabling 2³ = 8 distinct addresses. All devices must use the same VCC and share common SDA/SCL pull-ups.
What is the page write time specification for the 24C01CT-E/SN?
The 24C01CT-E/SN has a maximum page write time of 1.5 ms, as specified in Table 1-2 (Param. No. 15, TWC) of DS21201K for automotive temperature range. This applies to both byte and page write operations. The device initiates this self-timed internal cycle upon receipt of a STOP condition, during which it does not respond to I²C traffic until completion - verified via acknowledge polling.
Is the 24C01CT-E/SN pin-compatible with other packages in the 24C01C family?
Yes - the 24C01CT-E/SN in 8-lead SOIC (3.90 mm) shares identical pinout and electrical behavior with other 8-pin variants of the 24C01C family, including PDIP, TSSOP, MSOP, DFN, and TDFN packages. Table 2-1 (DS21201K, page 5) confirms consistent pin mapping across all 8-pin formats. However, it is not pin-compatible with the 6-lead SOT-23 variant, which omits A2 and Test pins.
24C01CT-E/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:
- 1Kbit
- Memory Organization:
- 128 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 100 kHz
- Write Cycle Time - Word, Page:
- 1.5ms
- Access Time:
- 3.5 µs
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24C01CT-E/SN FAQ
1.How can I place an order for 24C01CT-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24C01CT-E/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 24C01CT-E/SN reliable?
The price and inventory of 24C01CT-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24C01CT-E/SN is usually 5 days.
3.What payment methods are accepted for 24C01CT-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24C01CT-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24C01CT-E/SN?
24C01CT-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24C01CT-E/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 24C01CT-E/SN?
For technical support, including 24C01CT-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24C01CT-E/SN requirements.
6.How does Aetrix verify that 24C01CT-E/SN is sourced from the original manufacturer or authorized distributors?
All 24C01CT-E/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 24C01CT-E/SN meets industry standards.
7.What is the process for return or replacement of 24C01CT-E/SN?
All 24C01CT-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24C01CT-E/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 24C01CT-E/SN part is unused and in its original packaging.
Return procedure for 24C01CT-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24C01CT-E/SN Tags
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