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Microchip Technology 24AA00T/ST
- Part No.:
- 24AA00T/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24AA00T/ST.pdf
- Description:
- IC EEPROM 128BIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,359
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Product details
Overview
24AA00T/ST from Microchip Technology Inc. is a 128-bit (16 × 8) I²C-compatible serial EEPROM designed for low-power, space-constrained applications requiring nonvolatile storage of calibration data, device IDs, or manufacturing traceability. It operates down to 1.8 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 24AA00T/ST datasheet, 24AA00T/ST pinout, 24AA00T/ST application, or 24AA00T/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 24AA00T/ST implements a true 2-wire I²C slave interface with Schmitt-trigger inputs and output slope control to suppress noise and eliminate ground bounce. Its internal address pointer enables current-address, random, and sequential read modes without external addressing logic.
It uses on-chip charge-pump voltage generation for EEPROM programming, features self-timed erase/write cycles (typ. 3 ms), and includes VCC threshold detection that disables write operations below 1.5 V - ensuring data integrity during brown-out conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 128 bits (16 × 8), sufficient for small ID strings or calibration offsets without over-provisioning. |
| Supply voltage | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V, 3.3 V, and 5 V microcontrollers without level shifters. |
| I²C clock rate | 100 kHz (1.8–4.5 V) / 400 kHz (4.5–5.5 V) - matches standard and fast-mode I²C buses across voltage ranges. |
| Write cycle time | Typ. 3 ms, max. 4 ms - defines minimum interval between successive byte writes; supports ACK polling for bus efficiency. |
| Endurance & retention | 1 million erase/write cycles and >200 years data retention - validated for long-life embedded deployments. |
| Quiescent current | 100 nA typical standby current - critical for battery-powered systems where sleep-mode leakage dominates power budget. |
| ESD protection | >4000 V HBM - provides robustness against handling and board-level ESD events in industrial environments. |
Pinout & Package
24AA00T/ST is supplied in Pb-free, RoHS-compliant 5-lead SOT-23 package (Microchip drawing C04-028D). The exposed pad is not electrically connected and may be left floating or tied to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL | Serial Clock input | Asynchronous edge-triggered clock for I²C synchronization; requires external pull-up; Schmitt-triggered for noise immunity. |
| SDA | Serial Data bidirectional I/O | Open-drain bus line; must be pulled up externally (2 kΩ for 400 kHz); handles both address/data transfer and ACK/NACK signaling. |
| VCC | Positive supply | Accepts 1.8–5.5 V; powers internal logic and EEPROM charge pump; threshold detector disables writes below 1.5 V. |
| VSS | Ground reference | Return path for all currents; connects to system ground plane; referenced by all input thresholds and output levels. |
| NC | No-connect | Pin 4 is unconnected internally; must be left floating or tied to VSS per layout best practice - no functional impact. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 1.8 V - eliminates need for voltage regulators in energy-harvesting or coin-cell designs. |
| Ultra-low standby current | 100 nA typical - reduces annual battery drain to sub-microamp-hours, extending shelf life in maintenance-free devices. |
| I²C bus compatibility | Fully compliant with Philips I²C-bus specification, including Start/Stop generation, ACK/NACK, and 7-bit slave addressing (1010xxx0). |
| Noise-immune interface | Schmitt-trigger inputs + 50 mV hysteresis + 50 ns input filter - rejects EMI spikes common in motor-driven or switching-power environments. |
| Factory programming option | Pre-programmed memory contents available at wafer sort - accelerates production test and reduces field programming overhead. |
Applications
| Smart Sensor Calibration | Industrial PLC Module ID |
|---|---|
|
Use Scenario: A MEMS pressure sensor stores factory-trimmed offset/gain coefficients and temperature compensation tables at final test. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed once at power-up via I²C; no timing-critical interaction during runtime. Use Value: Eliminates manual calibration per unit; ensures repeatability across batches and simplifies firmware by removing runtime computation. |
Use Scenario: A modular I/O baseboard retains unique serial number, firmware revision, and channel mapping for hot-swap identification. IC Role / Device Role / Timing Role: Slave EEPROM providing static identity data on request; supports sequential reads for compact firmware queries. Use Value: Enables plug-and-play diagnostics and prevents misconfiguration in multi-module distributed control systems. |
| Medical Wearable Device ID | Automotive Aftermarket ECU |
|
Use Scenario: A Bluetooth-enabled glucose monitor stores patient-specific pairing keys and regulatory certification codes. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage accessed only during secure boot handshake; isolated from main MCU bus during normal operation. Use Value: Meets IEC 62304 data integrity requirements while minimizing BOM count and PCB area in ultra-thin form factors. |
Use Scenario: An OBD-II adapter logs vehicle VIN, calibration date, and diagnostic trouble code history across ignition cycles. IC Role / Device Role / Timing Role: Write-once or infrequent-write log buffer; leverages 1M-cycle endurance for 10+ years of service life. Use Value: Provides auditable service records without requiring external flash or complex wear-leveling firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC00T/ST | Minimum VCC = 2.5 V; otherwise identical architecture, pinout, and timing. | Not suitable for 1.8 V systems; acceptable where 3.3 V rail is stable and guaranteed. | Select 24LC00T/ST only if supply margin above 2.5 V is assured and lower quiescent current is not required. |
| AT24C01C-SSHM-T | 1 Kbit capacity (128 × 8), same 1.7–5.5 V range, but higher standby current (1 µA vs. 100 nA) and no factory programming option. | Better suited for designs needing >128 bits; less optimal for ultra-low-power or pre-programmed use cases. | Choose AT24C01C-SSHM-T when memory expansion is anticipated or when sourcing diversity is prioritized over minimal current draw. |
Compared with 24AA00T/ST, the 24LC00T/ST trades 1.8 V operation for slightly relaxed voltage tolerance, while the AT24C01C-SSHM-T offers greater density at the cost of 10× higher standby leakage - making 24AA00T/ST the optimal choice for battery-critical, space-constrained, or factory-programmed implementations.
Availability
24AA00T/ST is available at Aetrix Electronics and suitable for smart sensor calibration, industrial PLC module ID, and medical wearable device ID requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/Pb-free compliance.
Supply support for 24AA00T/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, analog, and memory solutions, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.
The 24AA00T/ST belongs to Microchip's legacy 24XX00 family of ultra-low-power serial EEPROMs, engineered specifically for minimal footprint and energy use in calibration, identification, and configuration storage applications.
FAQ
What is the minimum operating voltage for the 24AA00T/ST?
The 24AA00T/ST operates down to 1.8 V across its full industrial temperature range (–40°C to +85°C). Below 1.5 V, its internal write-protection circuit disables EEPROM programming to prevent corruption - a hardware-enforced safeguard confirmed in DS20001178J Section 6.1.
Does the 24AA00T/ST support standard I²C addressing and protocol?
Yes, the 24AA00T/ST implements full I²C-bus compliance: 7-bit slave address 1010xxx (where xxx are "don't care"), Start/Stop condition recognition, ACK/NACK signaling, and support for current-address, random, and sequential read modes - all verified in Sections 5.0–8.3 of DS20001178J.
How many write cycles can the 24AA00T/ST endure?
The 24AA00T/ST is rated for more than 1 million erase/write cycles, with data retention exceeding 200 years under normal operating conditions. This endurance figure is ensured by characterization (not 100% tested) and documented in DS20001178J Table 1-2 Note 4.
What is the function of the NC pin on the 24AA00T/ST SOT-23 package?
Pin 4 of the 24AA00T/ST in 5-lead SOT-23 is a no-connect (NC) terminal - it has no internal connection and must be left floating or tied to VSS per Microchip's recommended layout guidance in DS20001178J Section 2.0 and Package Drawing C04-028D.
Can the 24AA00T/ST be used in automotive applications?
The 24AA00T/ST is specified for industrial temperature range (–40°C to +85°C) only. For automotive-grade operation up to +125°C, Microchip offers the 24C00 variant (e.g., 24C00-E/ST); the 24AA00T/ST is not qualified for AEC-Q100 or extended-temperature automotive use per DS20001178J Device Selection Table.
24AA00T/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:
- 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
24AA00T/ST FAQ
1.How can I place an order for 24AA00T/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA00T/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/ST reliable?
The price and inventory of 24AA00T/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/ST is usually 5 days.
3.What payment methods are accepted for 24AA00T/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA00T/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA00T/ST?
24AA00T/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA00T/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/ST?
For technical support, including 24AA00T/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA00T/ST requirements.
6.How does Aetrix verify that 24AA00T/ST is sourced from the original manufacturer or authorized distributors?
All 24AA00T/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/ST meets industry standards.
7.What is the process for return or replacement of 24AA00T/ST?
All 24AA00T/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24AA00T/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/ST part is unused and in its original packaging.
Return procedure for 24AA00T/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA00T/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
-
24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
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
-
AT24C08C-STUM-T
Microchip Technology
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