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Microchip Technology 24AA00T-I/ST
- Part No.:
- 24AA00T-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24AA00T-I/ST.pdf
- Description:
- IC EEPROM 128BIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,971
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Product details
Overview
24AA00T-I/ST from Microchip Technology Inc. is a 128-bit (16 × 8) I²C-compatible serial EEPROM designed for low-voltage embedded storage of calibration data, device IDs, and manufacturing traceability information. It operates from 1.8 V to 5.5 V, draws only 500 µA typical read current and 100 nA typical standby current, and supports 100 kHz / 400 kHz clock rates in industrial temperature range (–40°C to +85°C). Its 5-lead SOT-23 package enables space-constrained PCB layouts.
For engineers reviewing the 24AA00T-I/ST datasheet, 24AA00T-I/ST pinout, 24AA00T-I/ST application, or 24AA00T-I/ST equivalent, key selection criteria include ultra-low standby power, 1.8 V minimum supply compatibility, Schmitt-trigger noise immunity on SDA/SCL, self-timed write cycle (3 ms typical), and qualification for industrial-grade reliability with >1 million erase/write cycles and >200 years data retention.
Technical Context
The 24AA00T-I/ST implements a slave-only I²C interface with fixed 4-bit device address (1010b) and three don't-care bits, enabling up to eight devices on one bus. It uses internal high-voltage generation for EEPROM programming and includes a VCC threshold detector that disables writes below 1.5 V.
Its memory array is organized as 16 words × 8 bits, accessed via byte-write, current-address-read, random-read, and sequential-read modes. Address pointer auto-increment occurs after each read, and ACK polling is supported to detect write completion without fixed delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 128 bits (16 × 8), sufficient for small nonvolatile configuration or ID storage without over-provisioning. |
| Supply voltage range | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains. |
| I²C clock frequency | 100 kHz / 400 kHz - supports standard-mode and fast-mode timing without external clock scaling. |
| Write cycle time | 3 ms typical - defines minimum interval between successive write commands; self-timed, no external wait control needed. |
| Endurance | 1 million erase/write cycles - ensures long-term field reliability in systems requiring frequent parameter updates. |
| Data retention | 200+ years at +85°C - guarantees integrity of stored calibration or serial numbers across product lifetime. |
| Standby current | 100 nA typical - minimizes battery drain in always-on or energy-harvesting applications. |
Pinout & Package
24AA00T-I/ST is housed in a Pb-free, RoHS-compliant 5-lead SOT-23 package (Microchip drawing C04-028D [OT]). The exposed pad is not electrically connected and may be left floating or grounded for thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SCL | Serial clock input - synchronizes all I²C transfers; requires external pull-up; Schmitt-triggered for noise immunity. |
| 2 | VSS | Ground reference - common return path for all internal circuitry and I²C bus termination. |
| 3 | SDA | Open-drain bidirectional data line - requires external pull-up (2 kΩ for 400 kHz); supports Start/Stop detection and ACK signaling. |
| 4 | NC | No connect - internally unconnected; must be left floating per datasheet; not usable as strap or test point. |
| 5 | VCC | Power supply input - accepts 1.8–5.5 V; internal voltage monitor blocks writes if VCC drops below 1.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 1.8 V - eliminates need for level shifters when interfacing with 1.8 V microcontrollers or sensors. |
| Schmitt-trigger inputs | Hysteresis ≥0.05 × VCC - rejects bus noise spikes up to 50 ns, improving robustness in electrically noisy industrial environments. |
| Output slope control | Controlled SDA fall time (20 + 0.1×CB ns) - prevents ground bounce and EMI during transitions, easing EMC compliance. |
| Factory programming option | Pre-programmable at wafer/test - enables secure device serialization or calibration data pre-load before assembly. |
| ESD protection | 4 kV HBM - exceeds IEC 61000-4-2 Level 2, reducing risk of handling damage during board assembly. |
Applications
| Industrial Sensor Calibration | Medical Device ID 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 accessed once at power-up via I²C by host MCU. Use Value: Enables plug-and-play sensor replacement without manual recalibration; 1.8 V compatibility allows direct connection to low-power sensor signal chains. |
Use Scenario: Holding unique device serial number, manufacturing date, and firmware revision in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant identity store accessed during boot sequence for regulatory logging. Use Value: Meets FDA UDI requirements with 200-year data retention; 100 nA standby current extends battery life in battery-backed devices. |
| Consumer Appliance Configuration | Automotive Body Control Module |
Use Scenario: Saving user preferences (e.g., display brightness, language) in smart home thermostats across power cycles. IC Role / Device Role / Timing Role: Persistent settings memory updated infrequently via I²C during UI interaction. Use Value: Ultra-low 100 nA standby current prevents battery depletion in coin-cell-powered units; 1M endurance supports >10 years of daily changes. |
Use Scenario: Storing seat position presets and mirror adjustment profiles in automotive door modules. IC Role / Device Role / Timing Role: Slave EEPROM on vehicle body domain I²C bus, accessed by local MCU during initialization. Use Value: Industrial temperature rating (–40°C to +85°C) ensures operation in under-hood and door cavity environments; 4 kV ESD withstand protects against assembly discharge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC00T-I/ST | Requires minimum 2.5 V supply; otherwise identical pinout, timing, and memory organization. | Not suitable for 1.8 V systems; acceptable where 3.3 V or 5 V rails dominate and lower quiescent current is secondary. | Select only if system VCC ≥2.5 V and 24AA00T-I/ST's 1.8 V capability is unnecessary. |
| AT24C01C-SSHM-T | 1 Kbit capacity (128 × 8), same 1.7–5.5 V range, but higher 3 µA max standby current and no factory programming option. | Better suited for applications needing more than 128 bits; lacks pre-programming support for secure serialization. | Choose when >128 bits are required and factory programming is not mandatory; verify layout compatibility (SOIC-8 vs SOT-23). |
Compared with 24AA00T-I/ST, the 24LC00T-I/ST sacrifices 1.8 V operation for marginally lower cost in 2.5 V+ systems, while the AT24C01C offers greater density at the expense of higher standby current and no factory programming - making 24AA00T-I/ST optimal for ultra-low-power, space-constrained, and pre-configured use cases.
Availability
24AA00T-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device ID storage, consumer appliance configuration, and automotive body control module applications requiring stable component supply and long-term lifecycle support.
Supply support for 24AA00T-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 microcontroller, mixed-signal, analog, and Flash-IP solutions, serving industrial, automotive, communications, and consumer markets with high-reliability silicon and development tools.
The 24AA00T-I/ST belongs to Microchip's legacy 24XX00 family of ultra-low-power serial EEPROMs, engineered specifically for minimal footprint and energy consumption in battery-sensitive and space-constrained embedded systems.
FAQ
What is the minimum operating voltage for the 24AA00T-I/ST?
The 24AA00T-I/ST operates down to 1.8 V, verified across the full industrial temperature range (–40°C to +85°C). Its internal voltage monitor disables write operations below 1.5 V to prevent incomplete or corrupted programming, ensuring data integrity even during brown-out conditions. This makes the 24AA00T-I/ST uniquely suitable for direct integration with 1.8 V microcontrollers and low-power sensor interfaces without level-shifting circuitry.
Does the 24AA00T-I/ST support I²C fast mode (400 kHz)?
Yes, the 24AA00T-I/ST fully supports I²C fast mode at 400 kHz across its entire specified voltage range (1.8 V to 5.5 V), as confirmed in Table 1-2 of DS20001178J. It meets all AC timing parameters including THIGH (≥600 ns), TLOW (≥1300 ns), and TSU:DAT (≥100 ns) at 400 kHz, enabling efficient communication in bandwidth-constrained embedded systems without requiring slower clock rates or software delays.
How many write cycles can the 24AA00T-I/ST endure?
The 24AA00T-I/ST is rated for more than 1 million erase/write cycles, validated through characterization (not 100% tested per Note 4 in DS20001178J-page 3). This endurance specification applies across the full industrial temperature range and ensures reliable field operation for applications involving periodic updates - such as logging event counters or storing runtime calibration adjustments - over multi-year product lifetimes.
Is factory programming available for the 24AA00T-I/ST?
Yes, factory programming is explicitly listed as a feature in the official datasheet (DS20001178J-page 1). Microchip offers pre-programming of the 24AA00T-I/ST's 128-bit memory with customer-defined data - such as unique serial numbers, calibration constants, or security keys - during wafer sort or final test. This capability eliminates post-assembly programming steps and enhances supply chain security for high-volume OEM deployments.
What is the function of Pin 4 (NC) on the 24AA00T-I/ST SOT-23 package?
Pin 4 of the 24AA00T-I/ST is designated NC (No Connect) and is internally unconnected. Per the Pin Function Table (DS20001178J-page 4), it must remain unconnected on the PCB - neither tied to VCC, VSS, nor used as a test point. Routing or soldering to this pin risks mechanical stress or unintended coupling; leaving it floating ensures compliance with Microchip's validated package design and avoids potential functional anomalies.
24AA00T-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:
- 128bit
- Memory Organization:
- 16 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 4ms
- Access Time:
- 3500 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
24AA00T-I/ST FAQ
1.How can I place an order for 24AA00T-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA00T-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 24AA00T-I/ST reliable?
The price and inventory of 24AA00T-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 24AA00T-I/ST is usually 5 days.
3.What payment methods are accepted for 24AA00T-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA00T-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA00T-I/ST?
24AA00T-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA00T-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 24AA00T-I/ST?
For technical support, including 24AA00T-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA00T-I/ST requirements.
6.How does Aetrix verify that 24AA00T-I/ST is sourced from the original manufacturer or authorized distributors?
All 24AA00T-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 24AA00T-I/ST meets industry standards.
7.What is the process for return or replacement of 24AA00T-I/ST?
All 24AA00T-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24AA00T-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 24AA00T-I/ST part is unused and in its original packaging.
Return procedure for 24AA00T-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA00T-I/ST Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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