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Microchip Technology 24AA00/ST
- Part No.:
- 24AA00/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24AA00/ST.pdf
- Description:
- IC EEPROM 128BIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,277
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Product details
Overview
24AA00/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 parameters. 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).
For engineers reviewing the 24AA00/ST datasheet, 24AA00/ST pinout, 24AA00/ST application, or 24AA00/ST equivalent, this page delivers verified electrical specs, package mapping, I²C timing compliance, endurance (1M cycles), and real-world use context - all confirmed against Microchip DS20001178J.
Technical Context
The 24AA00/ST functions as an I²C slave device with fixed 4-bit device code '1010' and three don't-care address bits, enabling up to eight devices on one bus. Its internal address pointer auto-increments during sequential reads and retains position after byte writes.
It implements Schmitt-trigger inputs and input filtering (TSP ≤ 50 ns) for noise immunity, slope-controlled outputs to suppress ground bounce, and a VCC threshold detector that disables write logic below 1.5 V - ensuring reliable operation across its 1.8–5.5 V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 128-bit (16 × 8) EEPROM array - sufficient for small nonvolatile configuration or identity storage without overdesigning board space or cost. |
| Supply voltage | 1.8 V to 5.5 V - enables direct interface with 1.8 V, 3.3 V, and 5 V microcontrollers without level-shifting. |
| I²C clock rate | Up to 400 kHz - supports standard-mode and fast-mode I²C buses for responsive host communication. |
| Write cycle time | 3 ms typical - defines minimum interval between successive byte writes; self-timed erase/write eliminates need for external timing control. |
| Endurance | 1 million erase/write cycles - ensures long-term reliability in field-updatable systems such as sensor calibration or firmware revision tracking. |
| Data retention | 200 years - guarantees persistent storage integrity over full product lifecycle, even under industrial thermal stress. |
| ESD protection | >4 kV HBM - provides robust handling margin during assembly and field service without requiring additional protection circuitry. |
Pinout & Package
24AA00/ST is available in 5-pin SOT-23 package (Microchip drawing C04-028D/091D), with pin 1 = SCL, pin 2 = VSS, pin 3 = SDA, pin 4 = NC, pin 5 = VCC. The NC pin is internally unconnected and must be left floating or tied to VSS per layout best practice.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL | Serial Clock input | Asynchronous master-synchronized clock line; requires external pull-up; Schmitt-triggered for noise rejection. |
| VSS | Ground reference | Primary return path for all internal logic and I/O; must be low-impedance connection to system ground plane. |
| SDA | Serial Data bidirectional I/O | Open-drain output with internal pull-down; requires external pull-up resistor (2 kΩ for 400 kHz, 10 kΩ for 100 kHz). |
| NC | No-connect terminal | Internally unconnected; may be left floating or tied to VSS to reduce parasitic coupling in high-noise environments. |
| VCC | Power supply input | Accepts 1.8–5.5 V; includes internal VCC threshold detector that halts writes below 1.5 V to prevent data corruption. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 1.8 V - enables integration into battery-powered or energy-harvesting systems where supply headroom is constrained. |
| Ultra-low standby current | 100 nA typical - minimizes quiescent power draw in always-on applications like smart meters or IoT edge nodes. |
| I²C bus compatibility | Fully compliant with Philips I²C specification - ensures interoperability with standard microcontroller I²C peripherals without custom driver development. |
| Factory programming option | Pre-programmable at wafer/test stage - supports secure device serialization, MAC address injection, or calibrated offset storage before PCB assembly. |
| Pb-free & RoHS compliance | Meets EU Directive 2011/65/EU - simplifies global regulatory compliance and eliminates lead-based solder compatibility concerns. |
Applications
| Smart Sensor Calibration | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing factory-calibrated gain/offset coefficients and temperature compensation tables in MEMS pressure sensors. IC Role / Device Role / Timing Role: Nonvolatile memory slave on I²C bus; holds static calibration data accessed once per power-on or during field recalibration. Use Value: Eliminates need for external calibration EEPROM or MCU flash partitioning - reduces BOM count and firmware complexity while guaranteeing data persistence across 200-year lifetime. | Use Scenario: Retaining user-defined I/O mapping, alarm thresholds, and communication settings in modular programmable logic controllers. IC Role / Device Role / Timing Role: I²C-configurable parameter store; updated infrequently but must survive power loss and extended temperature cycling. Use Value: Provides deterministic, low-power, pin-efficient storage independent of main controller's flash endurance limits - critical for maintenance-free operation in harsh industrial environments. |
| Medical Device ID Storage | Consumer Appliance Firmware Revision Tracking |
Use Scenario: Holding unique device serial number, FDA registration code, and production lot traceability in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant identity register accessed via I²C during boot or service mode. Use Value: Enables regulatory-compliant device traceability without exposing sensitive identifiers in main MCU flash - meets ISO 13485 data integrity requirements. | Use Scenario: Recording firmware version, update timestamp, and rollback hash in white-goods controllers (e.g., washing machine mainboards). IC Role / Device Role / Timing Role: Version metadata repository; written once per OTA update and read at startup to validate software integrity. Use Value: Prevents accidental downgrade or corrupted update execution by anchoring version state outside volatile RAM or wear-limited MCU flash sectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC00-I/P | Minimum VCC = 2.5 V; otherwise identical memory size, timing, and pinout. | Not suitable for 1.8 V systems; otherwise drop-in compatible in 3.3 V/5 V designs with same footprint. | Select when operating above 2.5 V and legacy 24LC00 qualification is required. |
| AT24C01A-PU | 1 Kbit (128 × 8) capacity; same 1.8–5.5 V range and I²C interface; different device address (1010xxx). | Provides 8× more storage; requires minor firmware address map adjustment; shares same SOT-23 pinout. | Choose when future scalability or expanded parameter sets are anticipated without changing PCB layout. |
Compared with 24AA00/ST, 24LC00-I/P excludes 1.8 V operation but maintains identical packaging and timing, while AT24C01A-PU offers higher density in the same footprint - enabling either voltage-margin optimization or memory-headroom expansion without redesign.
Availability
24AA00/ST is available at Aetrix Electronics and suitable for smart sensor calibration, industrial PLC configuration, and medical device ID storage requiring stable component supply across extended product lifecycles.
Supply support for 24AA00/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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with broad industrial and automotive qualification coverage.
The 24XX00 family - including 24AA00/ST - was engineered for ultra-low-power, space-constrained nonvolatile storage in embedded systems where reliability, voltage flexibility, and I²C simplicity are prioritized over high density.
FAQ
What is the minimum supply voltage required for reliable operation of the 24AA00/ST?
The 24AA00/ST is specified to operate reliably down to 1.8 V across the industrial temperature range (–40°C to +85°C). Its internal VCC threshold detector disables write operations below 1.5 V to prevent data corruption, making it suitable for battery-backed or energy-harvesting applications where supply voltage may sag during peak load. This 1.8 V minimum distinguishes the 24AA00/ST from the 24LC00 (2.5 V min) and 24C00 (4.5 V min) variants in the same family.
Does the 24AA00/ST support both 100 kHz and 400 kHz I²C clock speeds?
Yes, the 24AA00/ST fully supports standard-mode (100 kHz) and fast-mode (400 kHz) I²C operation across its entire 1.8–5.5 V supply range and –40°C to +85°C temperature range. AC timing parameters - including THIGH, TLOW, TSU:DAT, and TAA - are guaranteed for both speeds per Microchip DS20001178J, enabling flexible integration with diverse host controllers without speed negotiation overhead.
How many write/erase cycles can the 24AA00/ST endure before failure?
The 24AA00/ST is rated for more than 1 million erase/write cycles, validated through characterization (not 100% tested per unit). This endurance level ensures long-term reliability in applications requiring periodic updates - such as sensor recalibration or firmware version logging - over multi-year deployments. Data retention remains guaranteed at >200 years under normal operating conditions.
What is the function of the NC pin on the 24AA00/ST in SOT-23 package?
The NC (No Connect) pin on the 24AA00/ST SOT-23 package is internally unconnected and serves no electrical function. Per Microchip's pin function table and package drawings, it may be left floating or tied to VSS to minimize noise coupling in high-EMI environments. It must never be connected to VCC or driven actively, as doing so violates the device's absolute maximum ratings and may compromise reliability.
Can the 24AA00/ST be used in automotive applications requiring AEC-Q200 qualification?
No, the 24AA00/ST is specified only for the industrial temperature range (–40°C to +85°C) and is not AEC-Q200 qualified. For automotive applications, Microchip offers the 24C00-E variant (–40°C to +125°C) in select packages, but the 24AA00/ST itself lacks automotive-grade screening, qualification testing, and extended temperature validation. Designers requiring automotive compliance must select a qualified alternative such as the 24C00-E/P or AT24C01C-MAHM-T.
24AA00/ST 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:
- 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:
- 8-TSSOP
24AA00/ST FAQ
1.How can I place an order for 24AA00/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA00/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 24AA00/ST reliable?
The price and inventory of 24AA00/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA00/ST is usually 5 days.
3.What payment methods are accepted for 24AA00/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA00/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA00/ST?
24AA00/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA00/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 24AA00/ST?
For technical support, including 24AA00/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA00/ST requirements.
6.How does Aetrix verify that 24AA00/ST is sourced from the original manufacturer or authorized distributors?
All 24AA00/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 24AA00/ST meets industry standards.
7.What is the process for return or replacement of 24AA00/ST?
All 24AA00/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24AA00/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 24AA00/ST part is unused and in its original packaging.
Return procedure for 24AA00/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA00/ST Tags
-
M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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