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Microchip Technology 24C01CT-E/MC
- Part No.:
- 24C01CT-E/MC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
24C01CT-E/MC.pdf
- Description:
- IC EEPROM 1KBIT I2C 100KHZ 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,462
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Product details
Overview
24C01CT-E/MC from Microchip Technology is a 1 Kbit (128 × 8) I²C-compatible serial EEPROM operating from 4.5V to 5.5V, featuring 16-byte page write buffer, 1 ms max page write time, and automotive-grade temperature range (–40°C to +125°C). It supports up to eight devices on one bus via A0–A2 address pins and delivers 5 µA standby current and >1 million erase/write cycles - used for configuration storage in engine control units, sensor calibration modules, and automotive infotainment systems.
For engineers reviewing the 24C01CT-E/MC datasheet, 24C01CT-E/MC pinout, 24C01CT-E/MC application, or 24C01CT-E/MC equivalent, key selection criteria include automotive temperature qualification, I²C clock compatibility (100/400 kHz), Schmitt-trigger noise immunity on SDA/SCL, WP pin functionality, and SOT-23 package footprint with 6-pin layout.
Technical Context
The 24C01CT-E/MC implements a true 2-wire I²C slave interface with hardware address decoding (A0–A1 only; A2 not present in SOT-23), internal address pointer auto-increment, and self-timed erase/write cycles. Its memory array is organized as a single 128-word block with page boundaries every 16 bytes.
It features Schmitt-trigger inputs on SDA and SCL with 50 ns spike suppression and hysteresis ≥0.05 VCC, plus output slope control to suppress ground bounce. The device uses an internal high-voltage generator for EEPROM programming and includes VCC threshold detection (<3.8 V disables write logic).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit), organized as single contiguous block |
| Supply voltage | 4.5V to 5.5V - compatible with standard 5V automotive logic rails |
| Temperature grade | Automotive (E): –40°C to +125°C - qualified for under-hood and powertrain applications |
| Write cycle time | Max 1 ms per byte or page - enables fast firmware parameter updates without blocking host MCU |
| I²C speed modes | 100 kHz and 400 kHz - supports both legacy and high-speed system buses |
| Endurance | ≥1,000,000 erase/write cycles - ensures long-term reliability in logging and calibration use cases |
| Data retention | >200 years at +25°C - guarantees nonvolatile storage integrity over vehicle lifetime |
Pinout & Package
24C01CT-E/MC is housed in a Pb-free, RoHS-compliant 6-lead SOT-23 package (3.0 mm × 1.7 mm × 1.3 mm), optimized for space-constrained automotive PCBs. Pin 1 is laser-marked; exposed pad is not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | +4.5V to +5.5V main supply; internal VCC monitor disables writes below ~3.8V |
| SCL | Serial clock input | Master-generated I²C clock; Schmitt-triggered with 50 ns noise filtering |
| SDA | Serial data bidirectional | Open-drain I²C data line requiring external pull-up; supports ACK polling during write cycles |
| VSS | Ground reference | System ground return; referenced for all input thresholds and output levels |
| A0 | Chip select bit 0 | Hardwired logic level (0 or 1) to configure 1 of 4 possible I²C addresses on shared bus |
| A1 | Chip select bit 1 | Hardwired logic level (0 or 1); combined with A0 enables up to four 24C01CT-E/MC devices per bus |
Key Features
| Feature | Design Value |
|---|---|
| Automotive temperature range | Qualified from –40°C to +125°C per AEC-Q100 stress test requirements |
| Page write buffer | 16-byte buffer enables burst writes without repeated address overhead - reduces I²C transaction count by up to 94% vs. byte writes |
| Schmitt-trigger inputs | SDA/SCL inputs reject noise spikes ≥50 ns and provide ≥0.05 VCC hysteresis - eliminates external RC filters in noisy automotive environments |
| WP pin omission | No Write Protect pin in SOT-23 variant - write protection must be implemented in software or via external logic |
| ESD robustness | ≥4 kV HBM - withstands electrostatic discharge during handling and assembly in automotive production lines |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing trim values for fuel injection timing, knock sensor offsets, and adaptive learning parameters that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration storage slave on I²C bus, accessed asynchronously by ECU microcontroller during boot and runtime calibration. Use Value: Enables field-updatable calibration without external backup power; 1 ms write time allows real-time parameter capture during transient events. | Use Scenario: Retaining camera lens focus offsets, radar module gain settings, and sensor fusion coefficients after power-down. IC Role / Device Role / Timing Role: I²C-configurable memory node supporting hot-plug initialization and fail-safe parameter reload in distributed ADAS ECUs. Use Value: Automotive temperature rating ensures stable operation near radar transceivers; >1M endurance supports daily recalibration routines over 15-year vehicle life. |
| Body Control Module (BCM) | Infotainment Head Unit |
Use Scenario: Saving user preferences (seat position, mirror angle, lighting profiles) and door lock configuration across battery disconnect events. IC Role / Device Role / Timing Role: Low-power I²C EEPROM interfaced to BCM MCU via 400 kHz bus; accessed during wake-up sequence. Use Value: 5 µA standby current minimizes parasitic drain on 12V battery; SOT-23 footprint saves board space in compact BCM designs. | Use Scenario: Storing audio equalizer presets, Bluetooth pairing tables, and display brightness profiles between power cycles. IC Role / Device Role / Timing Role: Secondary I²C slave providing persistent storage independent of main SoC's internal flash wear leveling. Use Value: Page write capability accelerates bulk profile saves; >200-year data retention guarantees settings survive vehicle ownership transfers. |
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, 1.7–5.5V supply, industrial temp (–40°C to +85°C), 8-lead SOIC package | Lacks automotive temperature rating; requires PCB redesign for SOIC footprint | Select only for cost-sensitive non-automotive designs where extended temperature range is unnecessary |
| BR24G01FJ-3GE2 | 1 Kbit I²C EEPROM, 1.6–5.5V supply, automotive temp (–40°C to +125°C), 8-lead TSSOP package | Includes hardware WP pin; larger TSSOP footprint increases board area vs. SOT-23 | Choose when write protection is mandatory and board space permits TSSOP; not drop-in compatible |
Compared with 24C01CT-E/MC, AT24C01D-SSHM-T offers wider voltage range but lacks automotive qualification, while BR24G01FJ-3GE2 adds WP functionality at the cost of larger packaging - making 24C01CT-E/MC optimal for space-constrained, WP-optional automotive nodes.
Availability
24C01CT-E/MC is available at Aetrix Electronics and suitable for automotive electronics, engine management systems, and ADAS sensor modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 24C01CT-E/MC 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 24C01C family was designed specifically for reliable, low-power nonvolatile storage in automotive, industrial, and consumer systems requiring I²C interface simplicity and long-term data integrity.
FAQ
What is the maximum I²C clock frequency supported by the 24C01CT-E/MC?
The 24C01CT-E/MC supports two standard I²C clock frequencies: 100 kHz (standard mode) and 400 kHz (fast mode). Its AC characteristics guarantee full timing compliance at both speeds across the full automotive temperature range (–40°C to +125°C), with minimum clock high/low times and setup/hold margins validated per I²C specification.
Does the 24C01CT-E/MC include a Write Protect (WP) pin?
No, the 24C01CT-E/MC in the SOT-23 package does not include a Write Protect (WP) pin. Unlike 8-pin variants (e.g., PDIP, SOIC), the 6-lead SOT-23 version omits WP to accommodate the smaller footprint. Write protection must therefore be implemented in firmware or via external logic controlling the I²C bus.
How many 24C01CT-E/MC devices can be connected on the same I²C bus?
Up to four 24C01CT-E/MC devices can share one I²C bus. This is because the SOT-23 package provides only A0 and A1 address pins (A2 is not bonded out), yielding 2² = 4 unique slave addresses (1010000x to 1010011x in binary). Each device must have distinct A0/A1 logic levels to avoid address collisions.
What is the page write capacity of the 24C01CT-E/MC?
The 24C01CT-E/MC has a 16-byte page write buffer. A single page write operation can store up to 16 consecutive bytes starting at any address aligned to a 16-byte boundary (e.g., 0x00–0x0F, 0x10–0x1F). Attempting to cross a page boundary causes wraparound within the current page, not automatic advancement to the next page.
Is the 24C01CT-E/MC pin-compatible with other Microchip 24C01 variants?
No, the 24C01CT-E/MC is not pin-compatible with 8-pin 24C01C variants due to its 6-lead SOT-23 package. While electrical and functional behavior is identical, the pin count, layout, and absence of A2 and Test pins require PCB redesign. It shares the same I²C protocol and memory map as other 24C01C family members.
24C01CT-E/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not 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-DFN (2x3)
24C01CT-E/MC FAQ
1.How can I place an order for 24C01CT-E/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for 24C01CT-E/MC 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/MC reliable?
The price and inventory of 24C01CT-E/MC 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/MC is usually 5 days.
3.What payment methods are accepted for 24C01CT-E/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24C01CT-E/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24C01CT-E/MC?
24C01CT-E/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24C01CT-E/MC 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/MC?
For technical support, including 24C01CT-E/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24C01CT-E/MC requirements.
6.How does Aetrix verify that 24C01CT-E/MC is sourced from the original manufacturer or authorized distributors?
All 24C01CT-E/MC 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/MC meets industry standards.
7.What is the process for return or replacement of 24C01CT-E/MC?
All 24C01CT-E/MC units undergo pre-shipment inspection (PSI). If there is an issue with 24C01CT-E/MC, 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/MC part is unused and in its original packaging.
Return procedure for 24C01CT-E/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24C01CT-E/MC Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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