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Microchip Technology AT24C01A-10TSU-1.8-T
- Part No.:
- AT24C01A-10TSU-1.8-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C01A-10TSU-1.8-T.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,593
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Product details
Overview
AT24C01A-10TSU-1.8-T from Microchip Technology is a 1K-bit (128 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems, featuring 1.8V to 5.5V operation, 100 kHz I²C interface speed at 1.8V, and hardware write protection via the WP pin. It delivers high reliability with 1 million write cycles and 100-year data retention, and is housed in an 8-lead TSSOP package suitable for space-constrained industrial control and sensor node applications.
For engineers reviewing the AT24C01A-10TSU-1.8-T datasheet, AT24C01A-10TSU-1.8-T pinout, AT24C01A-10TSU-1.8-T application, or AT24C01A-10TSU-1.8-T equivalent, this page provides verified electrical specifications, validated pin functions, confirmed 1.8V-compatible timing behavior, and real-world use context for system-level integration and BOM replacement decisions.
Technical Context
The AT24C01A-10TSU-1.8-T implements a standard I²C-compatible two-wire interface with open-drain SDA and edge-triggered SCL, supporting bidirectional data transfer under strict timing constraints: tLOW = 4.7 µs and tHIGH = 4.0 µs minimum at 1.8V. Its internal address counter enables sequential reads across pages without readdressing.
It uses hard-wired A0–A2 pins for device addressing-allowing up to eight devices on one bus-and integrates Schmitt-trigger inputs with noise filtering on all control lines. The WP pin directly disables write operations when pulled high, providing deterministic hardware-level data protection independent of firmware state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 words × 8 bits), organized as 16 pages of 8 bytes each - defines maximum byte-addressable range (0x00–0x7F) and page-write boundaries. |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic families and compatibility with mixed-voltage systems without level shifters. |
| I²C Clock Frequency | 100 kHz max at 1.8V - sets maximum sustained data throughput (≈10 kB/s raw) and constrains SCL rise/fall time design (tR ≤ 1.0 µs, tF ≤ 300 ns). |
| Write Cycle Time | 5 ms maximum - determines minimum interval between successive write commands and impacts firmware timeout handling. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - validates suitability for field-updatable configuration storage in unattended equipment. |
| Operating Temperature | –40°C to +85°C - supports deployment in industrial environments including motor drives and outdoor metering nodes. |
| Standby Current | 0.6 µA typical at 1.8V - enables ultra-low-power operation in battery-backed or energy-harvesting systems. |
Pinout & Package
AT24C01A-10TSU-1.8-T is packaged in an 8-lead TSSOP (8A2) measuring 3.0 mm × 4.4 mm × 1.2 mm, with gull-wing leads and RoHS-compliant matte tin finish. This surface-mount package supports automated assembly and offers thermal performance suitable for convection-cooled PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A0) | Device Address Input | Hard-wired LSB of 3-bit device address; enables multi-drop I²C bus configuration (up to 8 devices). |
| 2 (A1) | Device Address Input | Mid-bit of device address; tied high/low to select unique slave address on shared SDA/SCL lines. |
| 3 (A2) | Device Address Input | MSB of device address; completes 3-bit hardware address (0x50–0x57) for collision-free arbitration. |
| 4 (GND) | Ground Reference | Return path for VCC and signal currents; must be low-impedance and routed near SDA/SCL to minimize noise coupling. |
| 5 (VCC) | Power Supply | 1.8V–5.5V supply input; requires local 100 nF ceramic decoupling placed within 3 mm of pin. |
| 6 (WP) | Write Protect Control | Active-high hardware lock: logic high disables all write operations, preventing accidental overwrites during power transients. |
| 7 (SCL) | Serial Clock Input | Positive-edge clock for data sampling; requires external pull-up (typically 2.2–10 kΩ) and meets tLOW/tHIGH timing at 1.8V. |
| 8 (SDA) | Serial Data I/O | Bidirectional open-drain line; shares pull-up with SCL; supports multi-master arbitration and clock stretching. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger filtered inputs | Suppresses noise-induced false clock/data transitions in electrically noisy industrial environments (e.g., near motors or relays). |
| 8-byte page write mode | Reduces firmware overhead by allowing up to 8 sequential bytes to be written per I²C transaction, cutting bus utilization by ~75% vs. byte writes. |
| Self-timed internal write cycle | Eliminates need for external write-delay timers; host can poll ACK after STOP to detect completion, simplifying driver implementation. |
| Hardware write protection (WP pin) | Provides fail-safe data integrity during brown-out, reset, or firmware crash-no software dependency required. |
| 1.8V–5.5V wide supply range | Enables direct connection to 1.8V microcontrollers (e.g., ARM Cortex-M0+) and eliminates level-shifter components in mixed-voltage designs. |
Applications
| Industrial Sensor Calibration | Consumer IoT Device Settings |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for temperature, pressure, and humidity sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed during power-on initialization via I²C; retains values across cold starts and firmware updates. Use Value: Enables plug-and-play sensor replacement without manual recalibration; leverages 100-year retention to avoid field recalibration cycles. |
Use Scenario: Persisting user preferences (Wi-Fi credentials, display brightness, alarm thresholds) in smart thermostats and connected lighting controls. IC Role / Device Role / Timing Role: Low-power configuration memory accessed infrequently during setup or OTA update; operates reliably at 1.8V from coin-cell backup rails. Use Value: Supports <0.6 µA standby current to extend battery life beyond 5 years; page-write capability accelerates settings save after UI interaction. |
| Automotive Body Control Module | Medical Diagnostic Equipment |
Use Scenario: Recording seat position memory, mirror presets, and door lock configuration in 12V automotive body control units with 3.3V domain regulation. IC Role / Device Role / Timing Role: Robust parameter storage tolerant of load-dump transients; WP pin prevents corruption during ignition cycling. Use Value: Qualified for –40°C to +85°C operation ensures reliability in under-hood environments; 1M endurance supports lifetime vehicle reprogramming. |
Use Scenario: Storing calibration constants, usage logs, and safety-critical fault history in portable ultrasound and ECG monitors powered by Li-ion batteries. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for regulatory audit trails; write protection prevents unauthorized log erasure. Use Value: Meets IEC 62304 Class C software requirements via deterministic hardware write disable; 100-year retention satisfies FDA long-term recordkeeping mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C01B-SSHM-T | Successor device with enhanced ESD rating (4 kV HBM), same 1K capacity, identical 8-lead SOIC package, but rated for 1 MHz I²C at 2.5V+ (not 100 kHz at 1.8V). | Requires ≥2.5V supply for full-speed operation; unsuitable for 1.8V-only systems where AT24C01A-10TSU-1.8-T is qualified. | Select AT24C01B only if migrating to higher-voltage domains or requiring improved robustness; verify timing compliance at target VCC. |
| M24C01-RMN6TP | 1K I²C EEPROM from STMicroelectronics; supports 1.7V–5.5V, 400 kHz at 1.8V, and offers 1.8V-specific AC specs aligned with JEDEC standards. | Higher speed at 1.8V enables faster configuration loading; pinout differs (SOIC-8 vs. TSSOP-8), requiring PCB layout change. | Choose M24C01-RMN6TP when 400 kHz throughput is needed at 1.8V and board redesign is acceptable; confirm WP functionality matches system protection logic. |
Compared with AT24C01A-10TSU-1.8-T, AT24C01B-SSHM-T trades 1.8V timing support for higher ESD resilience and speed above 2.5V, while M24C01-RMN6TP provides superior 1.8V performance but demands mechanical redesign-making the original part optimal for cost-sensitive, 1.8V-constrained legacy platforms.
Availability
AT24C01A-10TSU-1.8-T is available at Aetrix Electronics and suitable for industrial sensor nodes, consumer IoT gateways, and automotive body electronics requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT24C01A-10TSU-1.8-T 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 is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with a focus on reliability, longevity, and embedded system integration.
The AT24C01A-10TSU-1.8-T belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-voltage, low-power, and high-reliability data storage in industrial, automotive, and medical applications where deterministic write protection and extended data retention are critical.
FAQ
What is the maximum I²C clock frequency supported by AT24C01A-10TSU-1.8-T at 1.8V?
The AT24C01A-10TSU-1.8-T supports a maximum I²C clock frequency of 100 kHz when operating at 1.8V. This is explicitly specified in the AC Characteristics table (Table 5) and reflects timing constraints including minimum tLOW (4.7 µs) and tHIGH (4.0 µs). Attempting 400 kHz operation at 1.8V violates guaranteed timing margins and may result in communication failure.
Does AT24C01A-10TSU-1.8-T support partial page writes?
Yes, AT24C01A-10TSU-1.8-T supports partial page writes: up to eight bytes can be written in a single page-write transaction, starting at any byte address within a page boundary. The internal address counter auto-increments, and writes wrap within the same 8-byte page if the end is exceeded-enabling efficient small-data updates without full-page erasure.
How does the Write Protect (WP) pin function on AT24C01A-10TSU-1.8-T?
On AT24C01A-10TSU-1.8-T, the WP pin provides hardware-level write inhibition: when pulled high (≥0.7×VCC), it disables all write operations-including byte, page, and erase commands-while read operations remain fully functional. When grounded, normal read/write access is enabled. This behavior is unconditional and independent of I²C command sequence or firmware state.
Is AT24C01A-10TSU-1.8-T pin-compatible with AT24C01A-10PU-1.8?
No, AT24C01A-10TSU-1.8-T (8-lead TSSOP) is not pin-compatible with AT24C01A-10PU-1.8 (8-lead PDIP). Although both share identical pin functions (A0–A2, GND, VCC, WP, SCL, SDA), their physical footprints, lead pitch, and mounting geometry differ fundamentally-requiring separate PCB layouts and assembly tooling for each package variant.
What is the endurance specification for AT24C01A-10TSU-1.8-T?
The AT24C01A-10TSU-1.8-T is specified for 1 million write cycles per memory location, measured under 5.0V, 25°C conditions per Table 5. This endurance rating applies to individual bytes and is maintained across the full operating temperature range (–40°C to +85°C), ensuring reliable field reprogramming in applications such as firmware parameter tuning and calibration updates.
AT24C01A-10TSU-1.8-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C01A-10TSU-1.8-T FAQ
1.How can I place an order for AT24C01A-10TSU-1.8-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01A-10TSU-1.8-T 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 AT24C01A-10TSU-1.8-T reliable?
The price and inventory of AT24C01A-10TSU-1.8-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C01A-10TSU-1.8-T is usually 5 days.
3.What payment methods are accepted for AT24C01A-10TSU-1.8-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10TSU-1.8-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01A-10TSU-1.8-T?
AT24C01A-10TSU-1.8-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01A-10TSU-1.8-T 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 AT24C01A-10TSU-1.8-T?
For technical support, including AT24C01A-10TSU-1.8-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C01A-10TSU-1.8-T requirements.
6.How does Aetrix verify that AT24C01A-10TSU-1.8-T is sourced from the original manufacturer or authorized distributors?
All AT24C01A-10TSU-1.8-T 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 AT24C01A-10TSU-1.8-T meets industry standards.
7.What is the process for return or replacement of AT24C01A-10TSU-1.8-T?
All AT24C01A-10TSU-1.8-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-10TSU-1.8-T, 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 AT24C01A-10TSU-1.8-T part is unused and in its original packaging.
Return procedure for AT24C01A-10TSU-1.8-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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