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Microchip Technology 24AA00T/OT
- Part No.:
- 24AA00T/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SC-74A, SOT-753
- Datasheet:
-
24AA00T/OT.pdf
- Description:
- IC EEPROM 128BIT I2C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
24AA00T/OT from Microchip Technology Inc. is a 128-bit (16 × 8) I²C-compatible serial EEPROM optimized for ultra-low-power embedded storage. 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. It is used for storing calibration data, device IDs, and manufacturing traceability in space-constrained industrial sensors and portable electronics.
For engineers reviewing the 24AA00T/OT datasheet, 24AA00T/OT pinout, 24AA00T/OT application, or 24AA00T/OT equivalent, this page delivers verified electrical specs, SOT-23 package mapping, I²C timing compliance, endurance (1M cycles), and real-world use context - all confirmed against Microchip DS20001178J.
Technical Context
The 24AA00T/OT implements a slave-only I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress ground bounce and noise spikes. Its internal address pointer enables current-address, random, and sequential read modes without external addressing logic.
It features self-timed erase/write cycles (typ. 3 ms), VCC threshold detection (disables write below 1.5 V), and ACK polling support to maximize bus throughput during write completion. No external write-enable pin is required - write protection is handled via software address locking and power-supply monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 128 bits (16 × 8), sufficient for firmware ID strings or sensor calibration coefficients |
| Supply voltage | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V logic and legacy 5 V systems |
| I²C clock rate | 100 kHz (1.8–4.5 V) / 400 kHz (4.5–5.5 V) - matches standard and fast-mode I²C controllers |
| Write cycle time | Typ. 3 ms, max. 4 ms - defines minimum inter-write interval for burst programming sequences |
| Endurance | 1 million erase/write cycles - supports field-updatable calibration over 10+ years of daily use |
| Data retention | >200 years at +25°C - ensures long-term validity of stored device identity or configuration |
| Standby current | 100 nA typical - critical for battery-powered devices requiring multi-year shelf life |
Pinout & Package
24AA00T/OT is supplied in a 5-lead SOT-23 package (Microchip drawing C04-091D [OT]), with pin 1 as SCL, pin 2 as VSS, pin 3 as SDA, pin 4 as NC, and pin 5 as VCC. The NC pin is not internally connected and must be left unconnected or tied to VSS per layout best practice.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SCL) | Serial Clock input | Asynchronous edge-triggered clock for I²C timing; requires external pull-up resistor |
| 2 (VSS) | Ground reference | Primary return path for all internal logic and I/O; must be low-impedance connection |
| 3 (SDA) | Serial Data bidirectional I/O | Open-drain output with Schmitt trigger input; requires external pull-up (2 kΩ for 400 kHz) |
| 4 (NC) | No connect | Not bonded; electrically isolated - no routing or soldering required |
| 5 (VCC) | Power supply | Supplies core logic and EEPROM array; must be decoupled with 0.1 µF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | 0.05 × VCC hysteresis - rejects EMI-induced glitches on SCL/SDA in noisy industrial environments |
| Output slope control | Controlled rise/fall times - eliminates ground bounce that could corrupt adjacent digital signals |
| Factory programming option | Pre-programmed memory contents available - reduces post-manufacturing test time and firmware overhead |
| ESD protection | >4000 V HBM - meets IEC 61000-4-2 Level 3 for robust handling in assembly and field service |
| Pb-free & RoHS | JEDEC-compliant matte tin finish - satisfies global environmental compliance without performance trade-offs |
Applications
| Industrial Sensor Calibration | Medical Device ID Storage |
|---|---|
|
Use Scenario: Storing temperature-compensation coefficients and factory calibration offsets in a MEMS pressure sensor module. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed once at power-up; no runtime writes required. Use Value: Eliminates need for external microcontroller-based calibration management; reduces BOM count by one IC. |
Use Scenario: Holding unique device serial number, manufacturing date, and regulatory certification codes in a portable glucose meter. IC Role / Device Role / Timing Role: Secure, tamper-resistant identity register readable over I²C during USB enumeration or BLE pairing. Use Value: Enables traceability and anti-counterfeiting without increasing PCB area or firmware complexity. |
| Smart Energy Meter Firmware Tag | Automotive Body Control Module Trim Settings |
|
Use Scenario: Recording firmware version, patch level, and cryptographic key identifiers in a DIN-rail mounted electricity meter. IC Role / Device Role / Timing Role: Read-only tag memory updated only during certified firmware upgrades; accessed via isolated I²C bus. Use Value: Provides audit trail for regulatory compliance (IEC 62056) without exposing main MCU flash to field updates. |
Use Scenario: Saving user-adjusted mirror position, seat memory, and lighting preferences in a vehicle door module. IC Role / Device Role / Timing Role: Low-power nonvolatile scratchpad written infrequently (<10×/day) and retained across battery disconnects. Use Value: Maintains personalized settings without draining 12 V battery during vehicle sleep mode (100 nA standby). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC00T/OT | Minimum VCC = 2.5 V; higher standby current (1 µA vs. 100 nA) | Not suitable for 1.8 V systems or multi-year battery operation | Select when operating exclusively above 2.5 V and cost sensitivity outweighs ultra-low-power needs |
| AT24C01A-PU | 1 Kbit capacity; same 1.8–5.5 V range but no factory programming option | Over-provisioned memory for simple ID storage; lacks pre-load capability | Choose when future expansion headroom is needed and pre-programming is unnecessary |
Compared with 24AA00T/OT, the 24LC00T/OT trades ultra-low-voltage operation for marginally lower unit cost, while AT24C01A-PU offers greater density at the expense of tighter layout constraints and missing factory-programmable variants - making 24AA00T/OT optimal for minimal-footprint, battery-critical, pre-configured deployments.
Availability
24AA00T/OT is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device ID storage, smart energy meter firmware tagging, and automotive body control module trim settings requiring stable component supply across extended product lifecycles.
Supply support for 24AA00T/OT 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, serving industrial, automotive, and consumer markets with vertically integrated silicon and development tools.
The 24AA00 series belongs to Microchip's ultra-low-power serial EEPROM product line, designed specifically for minimal-footprint, battery-sensitive applications where reliability, data retention, and I²C compatibility are essential.
FAQ
What is the maximum clock frequency supported by the 24AA00T/OT?
The 24AA00T/OT supports up to 100 kHz when powered from 1.8 V to 4.5 V, and up to 400 kHz when powered from 4.5 V to 5.5 V. This dual-rate capability ensures compatibility with both legacy I²C controllers and modern fast-mode peripherals without requiring external clock dividers or protocol translation.
Does the 24AA00T/OT require an external write-enable pin?
No, the 24AA00T/OT does not have a write-enable (WP) pin. Write protection is implemented internally via power-supply monitoring - the device disables write operations when VCC falls below 1.5 V - and through software-controlled address locking. No external hardware is needed for basic write protection.
Can the 24AA00T/OT be used in a 1.8 V system with 400 kHz I²C communication?
No. At 1.8 V supply, the 24AA00T/OT is rated for 100 kHz maximum I²C clock frequency only. Attempting 400 kHz operation below 4.5 V violates AC timing specifications (THIGH, TLOW, TSU:DAT) and may result in unreliable data transfer or bus lockup.
How many write cycles can the 24AA00T/OT endure before failure?
The 24AA00T/OT is characterized for 1 million erase/write cycles per memory location. This endurance rating is ensured by process characterization (not 100% tested) and supports applications requiring daily updates for over 27 years - well beyond typical product lifespans in industrial and medical equipment.
Is factory programming available for the 24AA00T/OT?
Yes, factory programming is explicitly supported for the 24AA00T/OT per Microchip's DS20001178J documentation. Customers may order units pre-loaded with custom calibration data, device IDs, or firmware tags - reducing post-silicon programming steps and enabling secure, zero-touch provisioning.
24AA00T/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
24AA00T/OT FAQ
1.How can I place an order for 24AA00T/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA00T/OT 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/OT reliable?
The price and inventory of 24AA00T/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA00T/OT is usually 5 days.
3.What payment methods are accepted for 24AA00T/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA00T/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA00T/OT?
24AA00T/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA00T/OT 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/OT?
For technical support, including 24AA00T/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA00T/OT requirements.
6.How does Aetrix verify that 24AA00T/OT is sourced from the original manufacturer or authorized distributors?
All 24AA00T/OT 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/OT meets industry standards.
7.What is the process for return or replacement of 24AA00T/OT?
All 24AA00T/OT units undergo pre-shipment inspection (PSI). If there is an issue with 24AA00T/OT, 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/OT part is unused and in its original packaging.
Return procedure for 24AA00T/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA00T/OT 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
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M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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