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Microchip Technology 24AA014T-I/ST
- Part No.:
- 24AA014T-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24AA014T-I/ST.pdf
- Description:
- IC EEPROM 1KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,336
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Product details
Overview
24AA014T-I/ST from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory, operating from 1.7V to 5.5V with hardware write protection, 400 kHz max clock (100 kHz below 2.5V), and 16-byte page write buffer. It supports up to eight devices on one bus via A0–A2 address inputs and is rated for industrial temperature (−40°C to +85°C). It is used in embedded system configuration storage, sensor calibration data retention, and firmware parameter backup.
For engineers reviewing the 24AA014T-I/ST datasheet, 24AA014T-I/ST pinout, 24AA014T-I/ST application, or 24AA014T-I/ST equivalent, key selection criteria include low-voltage operation down to 1.7V, 1 μA standby current, hardware WP pin control, I²C timing compliance at both 100 kHz and 400 kHz, and verified 1 million erase/write cycles with >200-year data retention.
Technical Context
The 24AA014T-I/ST implements a standard two-wire I²C slave interface with Schmitt-trigger inputs on SDA and SCL, supporting standard-mode (100 kHz) and fast-mode (400 kHz) timing per JEDEC JESD36. Its internal architecture includes an 8-bit address pointer, 16-byte page write buffer, and high-voltage generator for EEPROM programming.
Write protection is implemented via dedicated WP pin logic that disables all write operations when pulled high, independent of I²C command flow. The device uses auto-erase and self-timed write cycles with guaranteed ≤5 ms completion, and supports acknowledge polling to detect write completion without fixed delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit), single-block organization - enables simple byte/page addressing without bank switching logic. |
| VCC range | 1.7V to 5.5V - supports direct connection to 1.8V, 2.5V, 3.3V, and 5V rails without level shifting. |
| Max clock frequency | 400 kHz (≥1.8V); 100 kHz (<1.8V) - ensures interoperability with legacy and modern I²C masters across voltage domains. |
| Write endurance | 1,000,000 cycles - guarantees long-term reliability in frequent parameter update applications like metering or logging. |
| Data retention | >200 years at 25°C - eliminates need for periodic refresh in battery-backed or infrequently powered systems. |
| Standby current | 1 μA typical at 5.5V - minimizes quiescent power draw in always-on IoT edge nodes and portable devices. |
| Page write buffer | 16 bytes - reduces I²C transaction count by up to 16× versus byte-write, improving bus efficiency and reducing host CPU overhead. |
Pinout & Package
24AA014T-I/ST is supplied in an 8-lead TSSOP package (3.0 mm × 4.4 mm, 0.65 mm pitch) with exposed pad option. Pin 1 is marked by laser indentation; package is Pb-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip address input | LSB of 3-bit slave address; hardwired to VSS or VCC to select one of eight possible I²C addresses (1010xxx). |
| A1 | Chip address input | Middle bit of slave address; determines device uniqueness on shared I²C bus with up to seven other 24AA014T-I/ST units. |
| A2 | Chip address input | MSB of slave address; required for full 3-bit addressing; not present on SOT-23 variant but functional in TSSOP. |
| VSS | Ground reference | Return path for all internal circuitry; must be connected to system ground plane with low-impedance trace. |
| SDA | Serial data I/O | Open-drain bidirectional bus line requiring external pull-up (2 kΩ for 400 kHz); carries address, data, and ACK/NACK signals. |
| SCL | Serial clock input | Master-generated clock synchronizing all I²C transfers; Schmitt-trigger input ensures noise immunity on noisy PCBs. |
| WP | Hardware write-protect | Active-high enable: tied to VCC blocks all writes (read-only mode); tied to VSS enables full read/write access. |
| VCC | Power supply | Single 1.7–5.5V supply; powers EEPROM array, interface logic, and HV generator; decoupling capacitor (0.1 μF) required. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 1.7V - enables direct integration into ultra-low-power microcontroller subsystems without regulator overhead. |
| I²C compatibility | Fully compliant with standard- and fast-mode I²C protocol including Start/Stop detection, ACK polling, and 7-bit addressing. |
| Hardware write protection | Dedicated WP pin provides tamper-resistant, non-software-controllable lockout of memory writes - critical for secure boot parameters. |
| Page write capability | 16-byte buffer allows burst writes within a single I²C transaction - cuts bus traffic by ≥85% vs. sequential byte writes. |
| Extended endurance & retention | 1M write cycles and >200-year data retention validated per JEDEC standards - eliminates field replacement concerns in sealed equipment. |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding trim values accessed at power-up before ADC initialization. Use Value: Eliminates need for external calibration EEPROM or OTP fuses; 1.7V operation ensures reliable write during brown-out conditions. |
Use Scenario: Retaining tariff tables, billing counters, and communication settings in utility smart meters with 15+ year service life. IC Role / Device Role / Timing Role: Primary parameter storage element updated only during firmware upgrades or utility reconfiguration events. Use Value: 1M endurance and >200-year retention meet ANSI C12.1 and IEC 62056 requirements without periodic refresh. |
| IoT Edge Node State Backup | Medical Device Usage Logging |
|
Use Scenario: Saving last known operational state (e.g., sensor sampling rate, connectivity status) in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-power backup memory written only on shutdown or error condition; read at wake-up. Use Value: 1 μA standby current extends coin-cell battery life beyond 10 years; page write minimizes wake time during save. |
Use Scenario: Recording cumulative usage hours, sterilization cycles, and fault history in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-evident audit log storage where WP pin is permanently tied to VCC after commissioning. Use Value: Hardware write protection prevents accidental or malicious overwrite of regulatory-compliant usage records. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC014T-I/ST | Requires minimum 2.5V VCC; identical pinout, timing, and memory map - no layout change needed. | Not suitable for sub-2.5V systems; otherwise drop-in replacement where higher VCC is guaranteed. | Select when system rail is stable ≥2.5V and cost sensitivity favors mature 24LC variant. |
| AT24C01D-SSHM-T | 1.7–5.5V operation, same 1Kbit/128×8 structure, but uses different I²C address (1010000x) and lacks WP pin - software-controlled write lock only. | Requires firmware modification to handle alternate slave address and absence of hardware WP; no physical write-disable capability. | Select when hardware write protection is unnecessary and Atmel/Dialog supply chain preference applies. |
Compared with 24LC014T-I/ST, the 24AA014T-I/ST enables true low-voltage operation down to 1.7V and retains hardware WP functionality; versus AT24C01D-SSHM-T, it offers deterministic hardware-level write blocking critical for safety-critical parameter storage.
Availability
24AA014T-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and IoT edge node state backup requiring stable component supply across extended product lifecycles.
Supply support for 24AA014T-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 infrastructure.
The 24AA014T-I/ST belongs to Microchip's serial EEPROM product line, designed specifically for robust, low-power, I²C-based nonvolatile data storage in industrial, automotive, and consumer applications demanding long-term reliability.
FAQ
What is the minimum operating voltage for the 24AA014T-I/ST?
The 24AA014T-I/ST operates down to 1.7V, enabling direct use with 1.8V logic families and low-power microcontrollers without level translation. This specification is guaranteed across the full industrial temperature range (−40°C to +85°C) and is validated per DS21809G electrical characteristics Table 1-1.
Does the 24AA014T-I/ST support fast-mode I²C communication?
Yes, the 24AA014T-I/ST supports fast-mode I²C at up to 400 kHz when VCC ≥ 1.8V, and standard-mode at 100 kHz when VCC < 1.8V. AC timing parameters including THIGH, TLOW, and TSU:DAT are fully specified for both modes in DS21809G Table 1-2.
How many devices can share the same I²C bus with the 24AA014T-I/ST?
Up to eight 24AA014T-I/ST devices can operate on a single I²C bus using unique combinations of A0, A1, and A2 address pins. Each device responds only to its assigned 7-bit slave address (1010xxx), allowing contiguous 8 Kbit expansion when software maps address bits A8–A10.
What is the function of the WP pin on the 24AA014T-I/ST?
The WP (Write-Protect) pin on the 24AA014T-I/ST provides hardware-level inhibition of all write operations when pulled high to VCC. When tied to VSS, full read/write access is enabled. This pin operates independently of I²C commands and remains effective even during active bus transactions.
What is the maximum write cycle time for the 24AA014T-I/ST?
The maximum write cycle time for the 24AA014T-I/ST is 5 ms for both byte and page writes, as specified in DS21809G Table 1-2 Parameter TWC. This includes internal auto-erase and programming; acknowledge polling may be used to detect completion without fixed delay loops.
24AA014T-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:
- 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:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24AA014T-I/ST FAQ
1.How can I place an order for 24AA014T-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA014T-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 24AA014T-I/ST reliable?
The price and inventory of 24AA014T-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 24AA014T-I/ST is usually 5 days.
3.What payment methods are accepted for 24AA014T-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA014T-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA014T-I/ST?
24AA014T-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA014T-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 24AA014T-I/ST?
For technical support, including 24AA014T-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA014T-I/ST requirements.
6.How does Aetrix verify that 24AA014T-I/ST is sourced from the original manufacturer or authorized distributors?
All 24AA014T-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 24AA014T-I/ST meets industry standards.
7.What is the process for return or replacement of 24AA014T-I/ST?
All 24AA014T-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24AA014T-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 24AA014T-I/ST part is unused and in its original packaging.
Return procedure for 24AA014T-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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