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Microchip Technology AT24C01A-10TI-1.8
- Part No.:
- AT24C01A-10TI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C01A-10TI-1.8.pdf
- Description:
- IC EEPROM 1KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,130
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Product details
Overview
AT24C01A-10TI-1.8 from Microchip Technology (formerly Atmel) is a 1K-bit (128 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage embedded systems. It operates from 1.8V to 5.5V, supports 100 kHz I²C bus speed at 1.8V, features hardware write protection via the WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in battery-powered IoT sensors for nonvolatile configuration storage.
For engineers reviewing the AT24C01A-10TI-1.8 datasheet, AT24C01A-10TI-1.8 pinout, AT24C01A-10TI-1.8 application, or AT24C01A-10TI-1.8 equivalent, key selection factors include its 1.8V minimum supply, industrial temperature range (−40°C to +85°C), 8-byte page write capability, Schmitt-triggered noise-immune inputs, and TSSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The AT24C01A-10TI-1.8 implements a standard two-wire I²C interface with open-drain SDA and active-high SCL, supporting standard-mode timing (100 kHz max at 1.8V). Its internal address counter enables current-address and sequential reads without retransmitting the word address.
Device addressing uses hardwired A0–A2 pins (all grounded or tied per board design), allowing up to eight AT24C01A devices on one bus. Write protection is controlled solely by the WP pin state-no software lock-and all inputs are disabled during the self-timed 10 ms write cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1024 bits (128 words × 8 bits), sufficient for calibration data, device IDs, or small firmware flags |
| Supply voltage range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic and mixed-voltage systems without level shifters |
| I²C clock frequency | 100 kHz at 1.8V - ensures reliable communication in low-power modes while meeting timing margins |
| Write endurance | 1 million cycles - supports frequent logging or parameter updates in industrial control nodes |
| Data retention | 100 years at +25°C - guarantees long-term integrity of stored configuration across product lifetime |
| Operating temperature | −40°C to +85°C - qualified for industrial environments including factory automation and outdoor metering |
| Page write size | 8 bytes per page - reduces I²C transaction count when updating consecutive parameters |
Pinout & Package
AT24C01A-10TI-1.8 is housed in an 8-lead TSSOP package (package code 8T), measuring 3.0 mm × 4.4 mm × 1.2 mm, with 0.65 mm lead pitch and gull-wing leads compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device address input | Hard-wired to GND or VCC to set LSB of 7-bit I²C slave address (0x50–0x57); required for multi-device bus configuration |
| A1 | Device address input | Hard-wired to GND or VCC to set middle bit of I²C address; enables up to eight AT24C01A devices on one bus |
| A2 | Device address input | Hard-wired to GND or VCC to set MSB of I²C address; no internal pull-up/pull-down - external bias required |
| GND | Ground reference | Return path for VCC and signal currents; must be low-impedance and separated from noisy digital ground if mixed-signal layout |
| VCC | Power supply | Accepts 1.8V–5.5V; decoupling capacitor (100 nF ceramic) required within 5 mm of pin for noise immunity |
| WP | Write protect control | Active-high hardware lock: tied to VCC disables all writes; tied to GND enables full read/write access |
| SCL | I²C clock input | Positive-edge sampled; requires external pull-up (typically 4.7 kΩ to VCC); Schmitt trigger input rejects <100 ns noise |
| SDA | I²C bidirectional data | Open-drain output; requires same external pull-up as SCL; supports wire-OR with other I²C peripherals |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Rejects >100 ns noise pulses on SCL/SDA, eliminating false clocking or bus glitches in electrically noisy industrial enclosures |
| Hardware write protection | WP pin provides tamper-resistant, zero-software-overhead data lock - critical for bootloader or security key storage |
| 100-year data retention | Guarantees stored calibration coefficients remain valid over full product lifecycle without refresh routines |
| 1.8V operation | Enables direct connection to 1.8V microcontrollers (e.g., STM32L0/L4, MSP430FRxx) without voltage translation circuitry |
| Self-timed write cycle | Fixed 10 ms internal erase/write eliminates need for software delay loops or polling overhead in host firmware |
Applications
| Smart Energy Meters | Industrial PLC Modules |
|---|---|
Use Scenario: Storing tariff schedules, meter ID, and accumulated kWh values between power cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration and event-logging memory interfaced to an ARM Cortex-M3 MCU via I²C. Use Value: 1.8V operation allows direct integration with low-power metrology SoCs; 100-year retention ensures accuracy compliance over 20+ year field deployment. | Use Scenario: Retaining I/O mapping tables, calibration offsets, and firmware update flags in modular I/O bases. IC Role / Device Role / Timing Role: Persistent parameter store accessed during cold start and runtime reconfiguration. Use Value: −40°C to +85°C rating matches PLC ambient requirements; hardware WP prevents accidental overwrite during ESD events on field wiring. |
| Medical Wearables | Automotive Body Controllers |
Use Scenario: Saving user preferences, sensor calibration data, and last-known vital sign thresholds in battery-operated patches. IC Role / Device Role / Timing Role: Low-quiescent-current (3 µA standby at 1.8V) nonvolatile memory co-located with an ultra-low-power BLE SoC. Use Value: 3 µA ISB enables multi-year battery life; 8-byte page writes minimize I²C traffic during periodic health-data commits. | Use Scenario: Storing seat position memory, mirror presets, and lighting configuration in door modules. IC Role / Device Role / Timing Role: I²C EEPROM directly connected to an automotive-grade 8-bit MCU (e.g., PIC16F193x) on LIN/I²C hybrid bus. Use Value: Qualified for industrial temp range covers under-hood and door cavity thermal profiles; WP pin prevents corruption during load-dump transients. |
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 1K-bit capacity and 1.8V–5.5V range, but in SOIC-8 (8S1) package and rated for commercial temp (0°C to +70°C) | Lacks industrial temperature qualification; unsuitable for extended ambient or under-hood use | Select only for cost-sensitive consumer products where industrial temp range is not required |
| BR24G01NUX-101 | Rohm's 1K-bit I²C EEPROM in TSSOP-8; supports 1.6V–5.5V, 400 kHz at 1.7V, and 1.2 µA standby at 1.8V | Lower standby current and higher speed at low voltage, but different device address map (0x50–0x57 vs. 0x50–0x57 - same) and no WP pin | Choose when ultra-low ISB or faster writes are prioritized over hardware write lock |
Compared with AT24C01D-SSHM-T, AT24C01A-10TI-1.8 offers guaranteed operation down to −40°C and includes a dedicated WP pin for secure configuration locking; compared with BR24G01NUX-101, it trades slightly higher standby current for robust hardware-level write protection essential in safety-critical firmware contexts.
Availability
AT24C01A-10TI-1.8 is available at Aetrix Electronics and suitable for smart energy meters, industrial PLC modules, medical wearables, and automotive body controllers requiring stable component supply across long production lifecycles.
Supply support for AT24C01A-10TI-1.8 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 components, and memory solutions, with broad industrial and automotive qualifications.
The AT24C01A belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-voltage, nonvolatile data storage in resource-constrained embedded systems where I²C simplicity and long-term data integrity are critical.
FAQ
What is the maximum I²C clock frequency supported by AT24C01A-10TI-1.8 at 1.8V?
The AT24C01A-10TI-1.8 supports up to 100 kHz I²C clock frequency when operating at 1.8V. This is specified in the AC Characteristics table under fSCL for 1.8V operation. The device does not support 400 kHz at 1.8V - that speed is only guaranteed at VCC ≥ 2.7V. Timing margins remain compliant across the full industrial temperature range.
Does AT24C01A-10TI-1.8 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C01A-10TI-1.8 requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is a CMOS input with Schmitt trigger. Typical values are 4.7 kΩ to VCC; value selection depends on bus capacitance and desired rise time. No internal pull-ups are present - omission will prevent I²C communication.
Can AT24C01A-10TI-1.8 be used interchangeably with AT24C01A-10PI-1.8?
No - AT24C01A-10TI-1.8 and AT24C01A-10PI-1.8 differ in package: TI denotes TSSOP-8 (8T), while PI denotes SOIC-8 (8S1). Pinout and electrical specs are identical, but PCB footprint and thermal/mechanical behavior differ. Direct substitution requires board layout revision unless both packages were designed into the same land pattern.
How does the WP pin function on AT24C01A-10TI-1.8 during power-up?
On AT24C01A-10TI-1.8, the WP pin is sampled at power-up and after each STOP condition. When WP is high (tied to VCC), all write operations - including byte, page, and write-enable commands - are blocked; only reads are permitted. When WP is low (tied to GND), full read/write access is enabled. No internal pull-up or pull-down exists - external bias is mandatory.
What is the page write size for AT24C01A-10TI-1.8, and how does it affect firmware design?
The AT24C01A-10TI-1.8 supports 8-byte page writes. Firmware must align multi-byte writes to 8-byte boundaries and limit burst length to ≤8 bytes per I²C transaction to avoid address roll-over within the page. Exceeding this causes data to wrap to the start of the same page, overwriting prior bytes - a constraint requiring explicit address management in host drivers.
AT24C01A-10TI-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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-TSSOP
AT24C01A-10TI-1.8 FAQ
1.How can I place an order for AT24C01A-10TI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01A-10TI-1.8 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-10TI-1.8 reliable?
The price and inventory of AT24C01A-10TI-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C01A-10TI-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C01A-10TI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10TI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01A-10TI-1.8?
AT24C01A-10TI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01A-10TI-1.8 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-10TI-1.8?
For technical support, including AT24C01A-10TI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C01A-10TI-1.8 requirements.
6.How does Aetrix verify that AT24C01A-10TI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C01A-10TI-1.8 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-10TI-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C01A-10TI-1.8?
All AT24C01A-10TI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-10TI-1.8, 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-10TI-1.8 part is unused and in its original packaging.
Return procedure for AT24C01A-10TI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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