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Microchip Technology 24C01C-E/SN
- Part No.:
- 24C01C-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24C01C-E/SN.pdf
- Description:
- IC EEPROM 1KBIT I2C 100KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,359
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Product details
Overview
24C01C-E/SN from Microchip Technology Inc. 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. write cycle time, and Schmitt-triggered SDA/SCL inputs for noise immunity. It supports up to eight devices on one bus via A0–A2 address pins and is rated for automotive temperature range (−40°C to +125°C), commonly used in engine control modules and automotive sensor calibration storage.
For engineers reviewing the 24C01C-E/SN datasheet, 24C01C-E/SN pinout, 24C01C-E/SN application, or 24C01C-E/SN equivalent, key selection considerations include its 400 kHz I²C clock compatibility, 5 µA standby current, 1 million erase/write cycles, 200-year data retention, and SOT-23-6 package with A2 pin omitted-critical for space-constrained automotive PCB layouts.
Technical Context
The 24C01C-E/SN implements a two-wire I²C slave interface with hardware-addressable device selection using A0/A1/A2 pins (A2 not present in SOT-23 package), enabling cascaded configurations up to four devices on one bus. Its internal address pointer auto-increments during sequential reads and wraps from 7Fh to 00h.
It uses an on-chip high-voltage generator for EEPROM programming, features self-timed erase/write cycles, and includes input filtering (50 ns spike suppression) plus hysteresis (≥0.05×VCC) on SDA/SCL to ensure robust operation in electrically noisy automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit organization), sufficient for small configuration tables or calibration constants |
| I²C clock frequency | Up to 400 kHz - enables faster firmware updates vs. legacy 100 kHz EEPROMs |
| Page write buffer | 16 bytes - reduces bus transactions by 16× compared to byte-write-only EEPROMs |
| Write cycle time | 1 ms max. (byte or page) - minimizes system blocking time during nonvolatile writes |
| Endurance | 1,000,000 erase/write cycles - supports frequent logging or parameter adjustment in automotive ECUs |
| Data retention | 200 years at +25°C - ensures long-term reliability across vehicle lifetime without refresh |
| Supply voltage | 4.5 V to 5.5 V - matches standard 5 V automotive rail, no LDO required |
| Operating temperature | −40°C to +125°C (Automotive E-grade) - qualified for under-hood and transmission control applications |
Pinout & Package
24C01C-E/SN is supplied in Pb-free, RoHS-compliant 6-lead SOT-23 package (3.0 mm × 1.7 mm × 1.3 mm). Pin 1 is laser-marked; exposed pad is not present. A2 pin is omitted per package specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply | +4.5V to +5.5V main supply; internal VCC threshold detector disables write if <3.8V |
| SCL | Serial clock input | Master-generated clock; Schmitt trigger + 50 ns spike filter ensures noise immunity |
| SDA | Serial data bidirectional | Open-drain I²C bus line requiring external pull-up; changes only during SCL low |
| VSS | Ground reference | Return path for all internal circuitry; must be low-impedance for stable EEPROM operation |
| A0 | Chip select bit 0 | Hardwired to VSS or VCC to configure 3-bit slave address; enables up to four devices on same bus |
| A1 | Chip select bit 1 | Second address bit; combined with A0 determines unique I²C slave address (1010xx0/1) |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte page write buffer | Reduces I²C transaction count by up to 16× versus byte writes, lowering bus occupancy and CPU overhead |
| Schmitt-trigger inputs | Provides ≥0.05×VCC hysteresis on SDA/SCL, eliminating false triggering from EMI in automotive harnesses |
| Self-timed write cycle | Eliminates need for external timing control; host can poll ACK to detect completion without fixed delays |
| ESD protection >4 kV | Meets ISO 10605 requirements for component-level ESD robustness in assembly and field service |
| Factory programming option | Enables pre-loading of calibration data or security keys before board assembly, reducing test time |
Applications
| Engine Control Unit (ECU) Calibration Storage | Body Control Module (BCM) Configuration |
|---|---|
Use Scenario: Storing fuel map coefficients, ignition timing offsets, and OBD-II fault codes that must survive power loss and thermal cycling. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via I²C during boot and runtime; retains data for 200 years at ambient temperature. Use Value: Enables field reprogramming of calibration without replacing MCU; 1M endurance supports repeated dealer updates over vehicle lifetime. | Use Scenario: Holding door lock logic states, lighting profiles, and seat position presets in battery-powered BCMs. IC Role / Device Role / Timing Role: Low-power I²C slave storing user preferences; draws only 5 µA standby current to extend battery life. Use Value: Eliminates need for backup battery or supercapacitor; 4.5–5.5 V operation interfaces directly with 5 V BCM rail. |
| Transmission Control Unit (TCU) Gear Strategy Tables | Advanced Driver Assistance System (ADAS) Sensor Offset Storage |
Use Scenario: Saving adaptive shift points and torque converter lock-up schedules updated during vehicle learning cycles. IC Role / Device Role / Timing Role: High-reliability EEPROM interfaced to TCU MCU; withstands −40°C to +125°C ambient per AEC-Q100 Grade 0. Use Value: 125°C rating allows placement near transmission housing; 1 ms write time prevents gear shift interruption during updates. | Use Scenario: Retaining camera/lidar alignment offsets after factory calibration and periodic recalibration in service centers. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for sensor compensation data accessed during cold boot and dynamic correction. Use Value: Factory-programmable option enables pre-load of initial offsets; 400 kHz I²C speed accelerates post-calibration verification. |
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, 1.7–5.5 V supply, 1 MHz I²C, 8-lead SOIC only; lacks A2 pin in SOT-23 variant | Broader voltage range suits mixed-supply systems; higher clock rate improves throughput but requires tighter layout | Select when 1.7 V operation or 1 MHz I²C is required; verify SOT-23 availability and pinout match |
| BR24G01NUX-5TR | 1 Kbit, 1.6–5.5 V, 1 MHz I²C, 6-lead USON; built-in write protect, no Test pin | USON package offers smaller footprint (2.0 × 2.0 mm); write protect enhances security against accidental overwrite | Prefer for ultra-compact layouts where USON fits; confirm Test pin absence does not impact test strategy |
Compared with 24C01C-E/SN, AT24C01D-SSHM-T supports wider voltage and faster I²C but lacks automotive temperature qualification; BR24G01NUX-5TR offers smaller USON packaging and integrated write protection but omits the Test pin used for production diagnostics.
Availability
24C01C-E/SN is available at Aetrix Electronics and suitable for automotive control units, industrial sensor nodes, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 24C01C-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, with global manufacturing and quality certifications including AEC-Q200 for passive components.
The 24C01C product line delivers cost-optimized, automotive-qualified serial EEPROMs designed specifically for reliable nonvolatile data storage in harsh environments such as engine bays and transmission control systems.
FAQ
What is the maximum I²C clock frequency supported by the 24C01C-E/SN?
The 24C01C-E/SN supports I²C clock frequencies up to 400 kHz across its full automotive temperature range (−40°C to +125°C). This is confirmed in Table 1-2 of the DS21201K datasheet under "FCLK" parameter. The device also maintains backward compatibility with 100 kHz operation, ensuring interoperability with legacy controllers. No external components are required to achieve 400 kHz timing compliance.
Does the 24C01C-E/SN include hardware write protection?
No, the 24C01C-E/SN does not integrate hardware write protection. It lacks a dedicated WP (Write Protect) pin - unlike later variants such as 24C01C-I/SN which include WP functionality. Write protection must be implemented externally via software-controlled I²C commands or system-level access control. This design choice simplifies the SOT-23-6 pinout but places responsibility for data integrity on the host controller's firmware logic.
How many 24C01C-E/SN devices can be connected on a single I²C bus?
Up to four 24C01C-E/SN devices can share one I²C bus. This limitation arises because the SOT-23 package omits the A2 pin, leaving only A0 and A1 available for chip addressing - yielding 2² = 4 unique slave addresses (101000x, 101001x, 101010x, 101011x). Each device must have distinct A0/A1 logic levels tied to VSS or VCC. Attempting to connect more than four will cause address collisions and bus contention.
What is the purpose of the Test pin on the 24C01C-E/SN?
The Test pin on the 24C01C-E/SN is reserved exclusively for factory wafer and package testing and has no functional role in end-user applications. Per Section 2.4 of the DS21201K datasheet, it may be tied high, tied low, or left floating without affecting normal operation. It is not bonded out in the SOT-23-6 package variant - meaning the 24C01C-E/SN physically lacks this pin, consistent with its 6-lead configuration.
Is the 24C01C-E/SN qualified to AEC-Q100 standards?
The 24C01C-E/SN is specified for the Automotive temperature grade (E: −40°C to +125°C) and manufactured using AEC-Q200-qualified processes for passive components, but it is not individually AEC-Q100 certified as an integrated circuit. Its qualification relies on Microchip's established automotive-grade process flow and extended temperature validation per DS21201K. For AEC-Q100-compliant designs, users should consult Microchip's official automotive qualification documentation and perform system-level stress testing.
24C01C-E/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:
- 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
24C01C-E/SN FAQ
1.How can I place an order for 24C01C-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24C01C-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 24C01C-E/SN reliable?
The price and inventory of 24C01C-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 24C01C-E/SN is usually 5 days.
3.What payment methods are accepted for 24C01C-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24C01C-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24C01C-E/SN?
24C01C-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24C01C-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 24C01C-E/SN?
For technical support, including 24C01C-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24C01C-E/SN requirements.
6.How does Aetrix verify that 24C01C-E/SN is sourced from the original manufacturer or authorized distributors?
All 24C01C-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 24C01C-E/SN meets industry standards.
7.What is the process for return or replacement of 24C01C-E/SN?
All 24C01C-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24C01C-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 24C01C-E/SN part is unused and in its original packaging.
Return procedure for 24C01C-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24C01C-E/SN Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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