My Inquiry
My Account
Microchip Technology 24C01CT-I/ST
- Part No.:
- 24C01CT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24C01CT-I/ST.pdf
- Description:
- IC EEPROM 1KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,388
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
24C01CT-I/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 industrial temperature range (–40°C to +85°C). It uses Schmitt-trigger inputs and slope-controlled outputs for noise immunity on shared buses in embedded control and sensor calibration systems.
For engineers reviewing the 24C01CT-I/ST datasheet, 24C01CT-I/ST pinout, 24C01CT-I/ST application, or 24C01CT-I/ST equivalent, key selection criteria include its 6-lead SOT-23 package, A0/A1 address pins (no A2), I²C clock compatibility up to 400 kHz, and guaranteed 1 million erase/write cycles with >200-year data retention.
Technical Context
The 24C01CT-I/ST implements a two-wire I²C slave interface with fixed 4-bit control code (1010b), supporting up to four devices per bus via A0/A1 address bits (A2 omitted in SOT-23). Its internal address pointer auto-increments during sequential reads and wraps at 0x7F → 0x00.
Write operations use self-timed erase/write cycles with ACK polling support; page writes are limited to 16 bytes within a single 16-byte physical page boundary. The device includes VCC threshold detection (<3.8V disable) and input filter spike suppression (50 ns) for robust operation in electrically noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit organization), sufficient for small configuration storage or calibration data |
| Supply voltage | 4.5V to 5.5V - compatible with standard 5V logic systems without level shifting |
| Interface | I²C-compatible 2-wire serial bus - enables simple, low-pin-count connectivity with microcontrollers |
| Page write buffer | 16 bytes - reduces bus transactions for multi-byte updates and improves write efficiency |
| Write cycle time | 1 ms max. (byte or page) - enables fast nonvolatile parameter updates in real-time systems |
| Endurance | 1,000,000 erase/write cycles - supports frequent field calibration or logging in industrial equipment |
| Data retention | >200 years at 25°C - ensures long-term reliability for unattended or maintenance-free deployments |
| Operating temp | –40°C to +85°C (Industrial grade) - validated for use in automotive ECUs, industrial PLCs, and outdoor sensors |
Pinout & Package
24C01CT-I/ST is housed in a Pb-free, RoHS-compliant 6-lead SOT-23 package (1.6 mm × 2.8 mm × 1.1 mm), optimized for space-constrained PCB layouts in portable and modular electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply | +4.5V to +5.5V main supply rail; internal VCC threshold detector disables writes below ~3.8V |
| SCL | Serial clock input | Master-generated I²C clock signal (up to 400 kHz); Schmitt-triggered for noise immunity |
| SDA | Serial data bidirectional | Open-drain I²C data line requiring external pull-up; supports START/STOP detection and ACK signaling |
| VSS | Ground reference | System ground return path; referenced for all input thresholds and output levels |
| A0 | Chip select bit 0 | Hardwired logic level (0 or 1) to configure one of four possible I²C slave addresses (1010xx0) |
| A1 | Chip select bit 1 | Hardwired logic level (0 or 1) - together with A0, selects device address; A2 not present in SOT-23 |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte page write buffer | Reduces I²C transaction count by up to 16× vs. byte writes, lowering bus overhead in firmware updates |
| Schmitt-trigger SDA/SCL inputs | Provides 0.05×VCC hysteresis (min.) to reject sub-50 ns noise spikes on shared industrial buses |
| Output slope control | Eliminates ground bounce during SDA transitions, preventing false START/STOP generation |
| ACK polling support | Enables deterministic timing of write completion without fixed delays - critical for real-time task scheduling |
| ESD protection | >4000V HBM - allows safe handling and board-level integration without additional protection circuitry |
Applications
| Industrial Sensor Calibration | Embedded Configuration Storage |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile memory slave on I²C bus, accessed during power-up initialization and field recalibration routines. Use Value: 1 ms write time and 1M-cycle endurance enable reliable coefficient updates during maintenance without downtime. | Use Scenario: Retaining user-defined settings (e.g., display brightness, communication baud rate) across power cycles in medical handheld devices. IC Role / Device Role / Timing Role: I²C-configurable parameter store interfaced to an ARM Cortex-M0+ MCU during boot sequence. Use Value: 6-lead SOT-23 footprint minimizes PCB area while >200-year data retention ensures lifetime setting persistence. |
| Automotive Body Control Module | IoT Edge Node Identity Storage |
Use Scenario: Holding unique node identifiers and CAN bus configuration parameters in vehicle door modules. IC Role / Device Role / Timing Role: I²C EEPROM slave addressed via A0/A1 pins, accessed by an 8-bit microcontroller during wake-up. Use Value: –40°C to +85°C rating and 4.5–5.5V operation ensure compatibility with automotive battery transients and ambient conditions. | Use Scenario: Securing device-specific cryptographic keys and firmware version stamps in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-power I²C memory used during secure boot and OTA update verification sequences. Use Value: 5 µA standby current extends battery life; 16-byte page writes optimize secure key chunking for AES-128 key storage. |
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 | Same 1 Kbit capacity, 1.7–5.5V supply, but supports 1 MHz I²C clock; 8-lead SOIC only | Wider voltage range suits mixed-supply systems; higher speed benefits high-throughput logging | Select if system requires >400 kHz I²C or operates below 4.5V - not pin-compatible with SOT-23 |
| BR24G01NUX-5TR | 1 Kbit, 1.6–5.5V, 400 kHz I²C, 6-lead USON package (2.0 × 1.6 mm); no A2 pin | Smaller footprint than SOT-23; identical addressing scheme (A0/A1 only) and timing specs | Prefer for ultra-compact designs where BR24G01NUX-5TR's USON footprint saves board space |
Compared with AT24C01D-SSHM-T and BR24G01NUX-5TR, the 24C01CT-I/ST offers proven industrial-temperature reliability in the widely adopted SOT-23 package, with identical A0/A1 addressing and 1 ms write performance - making it optimal for cost-sensitive, space-constrained 5V systems requiring long-term data integrity.
Availability
24C01CT-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded configuration storage, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for 24C01CT-I/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 leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24C01CT-I/ST belongs to Microchip's legacy 24Cxx I²C EEPROM family, designed specifically for low-cost, low-power, and high-reliability nonvolatile data storage in resource-constrained embedded systems.
FAQ
What is the maximum I²C clock frequency supported by the 24C01CT-I/ST?
The 24C01CT-I/ST supports I²C clock frequencies up to 400 kHz under industrial temperature conditions (–40°C to +85°C). Its AC characteristics specify minimum clock high/low times and rise/fall times compliant with Fast-mode I²C specifications, enabling interoperability with standard I²C masters without timing margin violations.
Does the 24C01CT-I/ST include hardware write protection?
No, the 24C01CT-I/ST does not include a dedicated Write Protect (WP) pin. Unlike 8-pin variants (e.g., 24C01C-P), the 6-lead SOT-23 package omits the WP terminal. Write protection must be implemented externally via software address locking or system-level access control - the 24C01CT-I/ST relies solely on slave address matching and command sequencing for write authorization.
How many 24C01CT-I/ST devices can be connected on a single I²C bus?
Up to four 24C01CT-I/ST devices can share one I²C bus, using combinations of A0 and A1 address pins (A2 is not present in the SOT-23 package). Valid slave addresses are 1010000b, 1010001b, 1010010b, and 1010011b - corresponding to A1:A0 = 00, 01, 10, 11. Each device must have unique A0/A1 hardwiring to avoid bus contention.
What is the page write boundary for the 24C01CT-I/ST?
The 24C01CT-I/ST has a 16-byte page write boundary, meaning valid page writes must begin at addresses aligned to multiples of 16 (e.g., 0x00, 0x10, 0x20…0x70). Attempting a page write that crosses a 16-byte boundary causes wraparound within the current page - for example, writing 16 bytes starting at 0x0F overwrites bytes 0x0F through 0x1E, not 0x0F through 0x1F. Firmware must enforce alignment to prevent unintended data loss.
Is the 24C01CT-I/ST compatible with 3.3V I²C systems?
No, the 24C01CT-I/ST is specified only for 4.5V to 5.5V operation and lacks guaranteed functionality below 4.5V. Its input thresholds (VIH ≥ 0.7×VCC, VIL ≤ 0.3×VCC) and internal VCC detector (~3.8V cutoff) make it incompatible with standard 3.3V I²C buses. For 3.3V systems, consider Microchip's 24AA01 or compatible 1.7–5.5V EEPROMs instead of the 24C01CT-I/ST.
24C01CT-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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:
- 400 kHz
- Write Cycle Time - Word, Page:
- 1ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24C01CT-I/ST FAQ
1.How can I place an order for 24C01CT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24C01CT-I/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 24C01CT-I/ST reliable?
The price and inventory of 24C01CT-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24C01CT-I/ST is usually 5 days.
3.What payment methods are accepted for 24C01CT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24C01CT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24C01CT-I/ST?
24C01CT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24C01CT-I/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 24C01CT-I/ST?
For technical support, including 24C01CT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24C01CT-I/ST requirements.
6.How does Aetrix verify that 24C01CT-I/ST is sourced from the original manufacturer or authorized distributors?
All 24C01CT-I/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 24C01CT-I/ST meets industry standards.
7.What is the process for return or replacement of 24C01CT-I/ST?
All 24C01CT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24C01CT-I/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 24C01CT-I/ST part is unused and in its original packaging.
Return procedure for 24C01CT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24C01CT-I/ST 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
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
