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Microchip Technology 24C01C-E/ST
- Part No.:
- 24C01C-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24C01C-E/ST.pdf
- Description:
- IC EEPROM 1KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,492
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Product details
Overview
24C01C-E/ST 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 automotive-grade temperature range (−40°C to +125°C). It supports up to eight devices on one bus via hardware address pins A0–A2 and delivers ultra-low standby current (5 µA max.) for power-sensitive embedded systems.
For engineers reviewing the 24C01C-E/ST datasheet, 24C01C-E/ST pinout, 24C01C-E/ST application, or 24C01C-E/ST equivalent, key selection criteria include I²C clock compatibility (100 kHz / 400 kHz), Schmitt-trigger noise immunity on SDA/SCL, WP pin absence in SOT-23 package, and automotive qualification per E-temp grade - all critical for automotive body control, industrial sensor calibration, and legacy system firmware storage.
Technical Context
The 24C01C-E/ST implements a true two-wire I²C slave interface with open-drain SDA/SCL requiring external pull-ups, internal address pointer auto-increment for sequential reads, and hardware-based chip select decoding using A0–A2 pins. Its architecture includes a dedicated HV generator for EEPROM programming and a VCC threshold detector disabling writes below 3.8 V.
Unlike standard I²C peripherals, it enforces strict timing compliance (e.g., THD:STA ≥ 600 ns, TAA ≤ 900 ns at 400 kHz) and uses Schmitt-trigger inputs with 50 ns spike suppression plus 0.05×VCC hysteresis 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), enabling compact nonvolatile storage for configuration data or calibration constants |
| Supply voltage | 4.5V to 5.5V only - not 2.5V or 3.3V compatible; requires stable 5V rail in automotive or industrial designs |
| Write cycle time | ≤1 ms for byte or page writes - enables fast firmware updates without blocking host MCU execution |
| Endurance | 1 million erase/write cycles - supports frequent logging or parameter tuning over product lifetime |
| Data retention | >200 years at 85°C - ensures long-term reliability in unpowered storage applications |
| I²C speed modes | 100 kHz and 400 kHz - compatible with legacy and high-speed microcontrollers without protocol translation |
| Temperature grade | Automotive (E): −40°C to +125°C - qualified for under-hood or chassis-mounted electronics |
Pinout & Package
24C01C-E/ST is supplied in 6-lead SOT-23 package (3.0 mm × 1.7 mm × 1.1 mm), with no Test or WP pin - simplifying layout but removing hardware write protection capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Must be 4.5–5.5V; internal VCC detector disables writes below 3.8V to prevent corruption |
| SCL | Serial clock input | Open-drain; requires external pull-up; defines timing for all I²C transactions |
| SDA | Serial data bidirectional | Open-drain; shared bus line for address/data transfer and ACK/NACK signaling |
| VSS | Ground reference | Return path for all internal logic and EEPROM programming current |
| A0 | Chip select bit 0 | Hardwired to VSS or VCC to configure 3-bit slave address; enables up to four devices on same bus (A2 absent) |
| A1 | Chip select bit 1 | Same function as A0; combined with A0, selects one of four unique addresses (00–11) in SOT-23 variant |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte page write buffer | Reduces I²C transaction overhead by allowing burst writes up to full page boundary without host intervention |
| Schmitt-trigger SDA/SCL inputs | Provides 50 ns noise spike suppression and 0.05×VCC hysteresis - eliminates need for external RC filters in noisy automotive buses |
| Self-timed erase/write cycle | Removes requirement for host MCU to poll status or manage timing - simplifies firmware integration |
| ESD protection >4 kV | Meets IEC 61000-4-2 Level 3 requirements - suitable for handling during assembly and field service |
| Cascadable up to four devices (SOT-23) | Enables 4 Kbit contiguous address space using A0/A1 bits as address extension (A8/A9), avoiding external multiplexing |
Applications
| Automotive Body Control Module | Industrial Sensor Calibration Storage |
|---|---|
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in vehicle door modules. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via I²C during power-up or user adjustment. Use Value: Automotive temperature rating (−40°C to +125°C) and 1M-cycle endurance ensure reliable recall after 15+ years of daily use. | Use Scenario: Retaining factory-calibrated offset/gain coefficients for pressure or temperature sensors in PLC analog input cards. IC Role / Device Role / Timing Role: I²C slave storing trim values read once at boot and applied to ADC/DAC registers. Use Value: 1 ms write time allows quick recalibration in-field; >200-year data retention prevents drift-induced measurement errors over equipment lifetime. |
| Legacy Industrial HMI Firmware Patch Storage | Medical Device Usage Log Recorder |
Use Scenario: Holding small firmware patches or UI language strings in older human-machine interface panels with limited flash resources. IC Role / Device Role / Timing Role: External I²C EEPROM supplementing microcontroller's internal program memory. Use Value: Page write capability enables efficient update of localized text blocks without erasing entire flash sectors. | Use Scenario: Recording timestamped usage events (e.g., sterilization cycles, battery swaps) in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-power I²C slave logging data during brief wake periods between sleep states. Use Value: 5 µA max. standby current extends battery life; automotive qualification ensures stability during transport or storage in varying ambient conditions. |
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, 1.7–5.5V supply, 400 kHz I²C, SOIC-8 only - lacks automotive temp grade and SOT-23 option | Requires PCB redesign for SOIC-8; unsuitable for space-constrained automotive modules | Select if wide-voltage operation (1.7V) or extended commercial temp range suffices and SOIC-8 footprint is available |
| BR24G01FJ-3GE2 | 1 Kbit, 1.6–5.5V, 400 kHz I²C, SOT-23-6, automotive (−40°C to +105°C) - lower max temp than 24C01C-E/ST | Rated to +105°C only - insufficient for under-hood applications requiring +125°C | Select for cost-sensitive consumer or industrial applications where +105°C is adequate and RoHS/REACH compliance is prioritized |
Compared with AT24C01D-SSHM-T and BR24G01FJ-3GE2, the 24C01C-E/ST uniquely combines SOT-23-6 packaging, full automotive temperature range (−40°C to +125°C), and Microchip's proven EEPROM reliability - making it the only drop-in solution for space-limited, high-temperature automotive subsystems.
Availability
24C01C-E/ST is available at Aetrix Electronics and suitable for automotive body control, industrial sensor calibration, and medical device usage logging requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 24C01C-E/ST 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-Q100 for automotive ICs.
The 24C01C family was designed specifically for cost-sensitive, space-constrained embedded systems needing reliable, low-power I²C EEPROM - particularly targeting automotive, industrial, and medical applications where data integrity and long-term retention are critical.
FAQ
What is the maximum I²C clock frequency supported by the 24C01C-E/ST?
The 24C01C-E/ST 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 validated across the full automotive temperature range (−40°C to +125°C), ensuring interoperability with modern microcontrollers without signal integrity compromises.
Does the 24C01C-E/ST include hardware write protection?
No, the 24C01C-E/ST in SOT-23 package (suffix -E/ST) does not include a Write Protect (WP) pin. Unlike 8-pin variants, the SOT-23 version omits WP - meaning write protection must be implemented in software via the I²C command structure or external logic, as confirmed in the Pin Function Table and Package Types section of DS21201K.
How many 24C01C-E/ST devices can be connected on a single I²C bus?
Up to four 24C01C-E/ST devices can share one I²C bus. Because the SOT-23 package lacks the A2 pin, only A0 and A1 are available for chip addressing - yielding four unique combinations (00, 01, 10, 11). This is explicitly stated in Section 2.3 and Section 5.1 of the datasheet for SOT-23 variants.
What is the page write capacity of the 24C01C-E/ST?
The 24C01C-E/ST features a 16-byte page write buffer. When performing a page write, the host may transmit up to 16 bytes starting at any address aligned to a 16-byte boundary (e.g., 0x00–0x0F, 0x10–0x1F); attempting to cross a boundary causes wraparound within the same page, as detailed in Figure 6-2 and the Page Write description on DS21201K-page 9.
Is the 24C01C-E/ST compliant with RoHS and Pb-free standards?
Yes, the 24C01C-E/ST is Pb-free and RoHS compliant, as confirmed in the Features section of DS21201K-page 1. The part marking "e3" on the package and documentation of Matte Tin (Sn) plating per JEDEC standards verify full compliance with EU RoHS Directive 2011/65/EU and related environmental regulations.
24C01C-E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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-TSSOP
24C01C-E/ST FAQ
1.How can I place an order for 24C01C-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24C01C-E/ST 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/ST reliable?
The price and inventory of 24C01C-E/ST 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/ST is usually 5 days.
3.What payment methods are accepted for 24C01C-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24C01C-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24C01C-E/ST?
24C01C-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24C01C-E/ST 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/ST?
For technical support, including 24C01C-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24C01C-E/ST requirements.
6.How does Aetrix verify that 24C01C-E/ST is sourced from the original manufacturer or authorized distributors?
All 24C01C-E/ST 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/ST meets industry standards.
7.What is the process for return or replacement of 24C01C-E/ST?
All 24C01C-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24C01C-E/ST, 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/ST part is unused and in its original packaging.
Return procedure for 24C01C-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24C01C-E/ST Tags
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