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Microchip Technology 24AA014HT-I/MS
- Part No.:
- 24AA014HT-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
24AA014HT-I/MS.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,893
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Product details
Overview
24AA014HT-I/MS from Microchip Technology Inc. is a 1 Kbit (128 × 8) I²C-compatible serial EEPROM with hardware write-protection for the upper half-array (addresses 40h–7Fh), operating from 1.7V to 5.5V, supporting up to 400 kHz clock frequency, and rated for industrial temperature range (−40°C to +85°C) in an 8-pin MSOP package.
For engineers reviewing the 24AA014HT-I/MS datasheet, 24AA014HT-I/MS pinout, 24AA014HT-I/MS application, or 24AA014HT-I/MS equivalent, this device serves as a low-power, noise-immune nonvolatile memory solution for embedded system configuration storage, calibration data retention, and firmware parameter backup where voltage flexibility and bus noise resilience are critical.
Technical Context
The 24AA014HT-I/MS implements a two-wire I²C interface with Schmitt-trigger inputs and output slope control to suppress ground bounce and reject noise spikes up to 50 ns. Its internal address counter supports current-address, random, and sequential read modes, while the 16-byte page write buffer enables efficient multi-byte programming without host-side timing constraints.
Hardware write protection is controlled solely by the WP pin state (VCC = protected, VSS = disabled), independent of software commands. The device uses on-chip high-voltage generation for erase/write cycles and includes a VCC threshold detector that disables write logic below 1.5 V to prevent inadvertent corruption during brown-out conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8 bytes) - sufficient for small configuration tables, sensor calibration coefficients, or boot parameters in space-constrained designs. |
| VCC operating range | 1.7V to 5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level-shifting. |
| Max I²C clock frequency | 400 kHz at VCC ≥ 1.8V - supports fast parameter updates while maintaining compatibility with legacy 100 kHz systems. |
| Write endurance | 1 million erase/write cycles - ensures long-term reliability for frequently updated settings in industrial controllers or medical devices. |
| Data retention | 200 years at 25°C - guarantees persistent storage of critical calibration or security keys over product lifetime. |
| Standby current | 1 μA maximum (I-temp) - minimizes power draw in battery-backed or energy-harvesting applications. |
| Page write capacity | Up to 16 bytes per write cycle - reduces I²C transaction overhead and improves throughput versus byte-write-only EEPROMs. |
Pinout & Package
24AA014HT-I/MS is housed in an 8-pin MSOP (Mini Small Outline Package) with 0.65 mm pitch, measuring 3.0 mm × 3.0 mm × 1.0 mm, optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip select input | Configures LSB of 7-bit slave address (1010xxx); allows up to eight devices on same I²C bus when combined with A1 and A2. |
| A1 | Chip select input | Configures middle bit of slave address; must be hard-wired to VSS or VCC-no floating states permitted. |
| A2 | Chip select input | Configures MSB of slave address; enables contiguous 8 Kbit expansion across multiple devices via software-addressed A8–A10 mapping. |
| VSS | Ground reference | Return path for all internal circuitry; requires low-impedance connection to system ground plane to maintain noise immunity. |
| SDA | Serial data bidirectional line | Open-drain I²C data line requiring external pull-up resistor (2 kΩ typical for 400 kHz); changes only during SCL low except for Start/Stop. |
| SCL | Serial clock input | Master-generated clock synchronizing all data transfers; features Schmitt trigger input for robust noise rejection. |
| WP | Hardware write-protect input | Active-high enable: tied to VCC locks addresses 40h–7Fh; tied to VSS disables protection entirely-no software override possible. |
| VCC | Power supply | Accepts 1.7V–5.5V; internal regulation ensures stable operation across wide input range; threshold detector prevents writes below 1.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs with 50 ns spike suppression | Eliminates need for external RC filtering on SDA/SCL lines, reducing BOM count and board area in noisy industrial environments. |
| Output slope control | Prevents ground bounce during SDA transitions, avoiding false Start/Stop detection and ensuring reliable communication on shared buses. |
| Half-array hardware write protection (40h–7Fh) | Physically blocks writes to upper 64 bytes regardless of software state-ideal for safeguarding factory-calibrated constants or security keys. |
| Self-timed write cycle with auto-erase | Removes requirement for precise host timing control; host can poll ACK or use fixed 5 ms delay before next command. |
| 100 kHz / 400 kHz dual-speed compatibility | Ensures interoperability with both legacy and modern I²C masters without protocol translation or clock stretching. |
Applications
| Industrial Sensor Calibration Storage | Medical Device Configuration Backup |
|---|---|
|
Use Scenario: Storing temperature-compensated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during power-up and recalibration routines via I²C. Use Value: Enables field-upgradable calibration without firmware reflash; 200-year data retention ensures accuracy across equipment lifecycle. |
Use Scenario: Retaining user-adjusted therapy parameters and safety limits in portable infusion pumps between power cycles. IC Role / Device Role / Timing Role: Secure, low-power parameter store interfaced to MCU during initialization and runtime updates. Use Value: Hardware write protection prevents accidental overwrite of critical safety thresholds during routine data logging. |
| Automotive Body Control Module Settings | Consumer Appliance User Preference Memory |
|
Use Scenario: Saving mirror/window position presets and lighting profiles in automotive body control units operating across −40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade EEPROM providing robust I²C communication under EMI-rich vehicle electrical environments. Use Value: Schmitt-trigger inputs and 4 kV ESD rating ensure reliable operation despite alternator ripple and load-dump transients. |
Use Scenario: Preserving cooking mode selections, timer values, and display brightness preferences in smart ovens and microwaves. IC Role / Device Role / Timing Role: Low-quiescent-current memory enabling battery-backed retention during AC power loss. Use Value: 1 μA standby current extends coin-cell life beyond 10 years; 1.7V minimum VCC supports brown-out operation during grid fluctuations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC014HT-I/MS | Requires minimum 2.5V VCC; supports 1 MHz I²C clock; identical pinout and memory map. | Better suited for 3.3V/5V-only systems needing higher throughput; not usable in 1.8V logic domains. | Select when higher speed (1 MHz) is required and supply voltage is ≥2.5V; verify WP behavior matches design intent. |
| AT24C01D-MAHM-T | 1 Kbit I²C EEPROM with 1.7V–5.5V operation, 400 kHz max clock, and write-protect pin; manufactured by Microchip (acquired Atmel). | Same functional scope but different marking and minor AC timing variances; RoHS-compliant MSOP-8 package. | Valid drop-in alternative with identical electrical interface and package; confirm factory programming availability if QTP required. |
Compared with 24AA014HT-I/MS, the 24LC014HT-I/MS offers faster clock support but sacrifices 1.7V operation, while the AT24C01D-MAHM-T provides equivalent low-voltage capability and sourcing continuity through Microchip's Atmel integration-making it preferable for new designs requiring long-term supply assurance.
Availability
24AA014HT-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration storage, medical device configuration backup, and automotive body control module settings requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 24AA014HT-I/MS 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 microcontroller, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design, manufacturing, and sales operations.
The 24AA014HT-I/MS belongs to Microchip's 24AAxxH family of low-voltage I²C EEPROMs, designed specifically for reliable nonvolatile data storage in battery-powered, energy-sensitive, and wide-temperature industrial and automotive applications.
FAQ
What is the minimum supply voltage required for reliable operation of the 24AA014HT-I/MS?
The 24AA014HT-I/MS operates reliably down to 1.7V across its full industrial temperature range (−40°C to +85°C). Below 1.8V, maximum I²C clock frequency is limited to 100 kHz to ensure timing margin. The internal VCC threshold detector disables write operations below 1.5V to prevent data corruption during brown-out events-this behavior is inherent to the 24AA014HT-I/MS and requires no external supervision circuitry.
How does hardware write protection work on the 24AA014HT-I/MS?
Hardware write protection on the 24AA014HT-I/MS is controlled exclusively by the WP pin: when tied to VCC, addresses 40h–7Fh (upper 64 bytes) are permanently locked against write or erase commands-even if the host attempts to write there, the 24AA014HT-I/MS acknowledges the command but ignores the data. When WP is tied to VSS, full array access is enabled. No software command can override this pin-driven protection, making it ideal for safeguarding immutable calibration data in the 24AA014HT-I/MS.
Can multiple 24AA014HT-I/MS devices share the same I²C bus?
Yes-up to eight 24AA014HT-I/MS devices can coexist on a single I²C bus using the A0, A1, and A2 address pins to configure unique 7-bit slave addresses (1010xxx). Each pin must be hard-wired to either VSS or VCC; floating states are invalid. This enables scalable memory expansion (up to 8 Kbits total) with contiguous addressing support in software, provided the host correctly maps A0–A2 to address bits A8–A10 as defined in the 24AA014HT-I/MS functional specification.
What is the maximum write cycle time for the 24AA014HT-I/MS?
The 24AA014HT-I/MS specifies a maximum write cycle time of 5 ms for both byte and page writes, regardless of whether hardware write protection is enabled or disabled. During this period, the device does not acknowledge I²C commands-this behavior enables ACK polling to detect completion. Host firmware must either wait the full 5 ms or implement ACK polling; exceeding this time does not damage the 24AA014HT-I/MS but may cause communication timeouts if polling is misconfigured.
Does the 24AA014HT-I/MS support standard I²C addressing modes?
Yes-the 24AA014HT-I/MS implements standard 7-bit I²C addressing with a fixed 4-bit control code (1010b) followed by three programmable chip-select bits (A2, A1, A0) and a read/write bit. It fully complies with I²C bus specifications including Start/Stop condition generation, ACK/NACK signaling, and clock stretching avoidance. The 24AA014HT-I/MS does not support 10-bit addressing or SMBus-specific commands such as block write/read-its interface is strictly compatible with legacy and modern I²C masters.
24AA014HT-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-MSOP
24AA014HT-I/MS FAQ
1.How can I place an order for 24AA014HT-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA014HT-I/MS 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 24AA014HT-I/MS reliable?
The price and inventory of 24AA014HT-I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA014HT-I/MS is usually 5 days.
3.What payment methods are accepted for 24AA014HT-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA014HT-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA014HT-I/MS?
24AA014HT-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA014HT-I/MS 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 24AA014HT-I/MS?
For technical support, including 24AA014HT-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA014HT-I/MS requirements.
6.How does Aetrix verify that 24AA014HT-I/MS is sourced from the original manufacturer or authorized distributors?
All 24AA014HT-I/MS 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 24AA014HT-I/MS meets industry standards.
7.What is the process for return or replacement of 24AA014HT-I/MS?
All 24AA014HT-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 24AA014HT-I/MS, 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 24AA014HT-I/MS part is unused and in its original packaging.
Return procedure for 24AA014HT-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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