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Microchip Technology 24AA01T/SN
- Part No.:
- 24AA01T/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24AA01T/SN.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,129
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Product details
Overview
24AA01T/SN from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory with hardware write-protection, 8-byte page write buffer, and operation down to 1.7V. It supports 400 kHz clock frequency (100 kHz below 2.5V), delivers ≤1 mA active current and ≤1 µA standby current, and targets nonvolatile configuration storage in space-constrained embedded systems.
For engineers reviewing the 24AA01T/SN datasheet, 24AA01T/SN pinout, 24AA01T/SN application, or 24AA01T/SN equivalent, this page provides verified electrical specs, SOIC-8 package mapping, I²C timing compliance, endurance (1M cycles), and real-world use context for industrial control, sensor calibration, and firmware parameter retention.
Technical Context
The 24AA01T/SN implements a 2-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer enables current-address, random, and sequential read modes without external addressing logic.
Write operations support byte and page modes (up to 8 bytes per page), with self-timed erase/write cycles completing in ≤5 ms. Hardware write-protection via the WP pin disables all writes when tied to VCC, while A0–A2 pins are unconnected and may be left floating or tied to VSS/VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit) - fits small configuration data, calibration coefficients, or device ID storage without over-provisioning. |
| Interface | I²C (2-wire serial) - enables simple two-pin connection to microcontrollers with standard I²C peripherals, no address decoding logic required. |
| VCC Range | 1.7V to 5.5V - supports direct interfacing with 1.8V, 3.3V, and 5V systems without level shifters. |
| Max Clock Frequency | 400 kHz (≥2.5V), 100 kHz (<2.5V) - ensures reliable timing margins across low-voltage battery-powered and legacy 5V designs. |
| Write Endurance | 1,000,000 cycles - guarantees long-term reliability for frequently updated parameters like runtime counters or error logs. |
| Data Retention | >200 years - maintains stored values across product lifetime without refresh, critical for unattended or maintenance-free deployments. |
| Standby Current | ≤1 µA (I-temp.) - minimizes quiescent power draw in always-on systems such as smart sensors or IoT edge nodes. |
Pinout & Package
24AA01T/SN is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package, designated by suffix "SN" per Microchip's packaging nomenclature. Pin 1 is marked with a notch or dot; top view orientation follows JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | No internal connection - unused; may be left floating or tied to VSS/VCC without affecting operation. |
| A1 | Address Input | No internal connection - unused; no impact on device addressing or functionality. |
| A2 | Address Input | No internal connection - unused; eliminates need for external pull-up/down resistors. |
| VSS | Ground | Reference return path for all internal circuitry and I/O; must be connected to system GND. |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up resistor (2–10 kΩ depending on speed). |
| SCL | Serial Clock Input | Input-only clock line synchronized to host controller; determines maximum I²C transfer rate. |
| WP | Write-Protect Input | Logic-high (VCC) disables all write operations; logic-low (VSS) enables full read/write access. |
| VCC | Power Supply | Single supply input supporting 1.7–5.5V; powers EEPROM array, control logic, and I/O buffers. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional at 1.7V - enables direct integration into energy-harvesting or coin-cell-powered devices without voltage boosting. |
| Page Write Buffer | 8-byte buffer - reduces I²C transaction count for multi-byte updates, improving bus efficiency and reducing host CPU overhead. |
| Schmitt Trigger Inputs | Hysteresis ≥0.05×VCC - rejects high-frequency noise on SDA/SCL lines, enhancing robustness in electrically noisy industrial environments. |
| Hardware Write Protection | WP pin controls full-array lock - prevents accidental or malicious firmware corruption during field updates or brown-out conditions. |
| ESD Robustness | >4 kV HBM - withstands handling and board-level ESD events without latch-up or parametric shift, reducing test yield loss. |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog temperature or pressure sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed once at power-up; I²C interface allows shared bus with other peripherals. Use Value: Eliminates need for external trimming components or reprogramming during manufacturing; retains accuracy across thermal cycling and 20+ year service life. | Use Scenario: Holding boot-time configuration flags (e.g., UART baud rate, display brightness, network MAC address) in medical infusion pumps. IC Role / Device Role / Timing Role: Persistent settings store accessed early in boot sequence; 1.7V operation ensures validity during brown-out recovery. Use Value: Enables user-customizable behavior without firmware reflash; 1 µA standby current extends battery backup duration beyond 10 years. |
| Firmware Parameter Logging | Consumer Appliance Identity Storage |
Use Scenario: Recording fault codes, runtime hours, and last-known operational state in HVAC control boards after unexpected power loss. IC Role / Device Role / Timing Role: Write-on-event storage triggered by MCU interrupt; page write mode batches multiple status updates per I²C transaction. Use Value: Supports diagnostic traceability and predictive maintenance; 1M endurance exceeds typical appliance lifetime by >10×. | Use Scenario: Storing unique serial number, model variant, and production date in smart washing machines for warranty tracking and OTA update targeting. IC Role / Device Role / Timing Role: One-time factory programming during final test; read-only during normal operation to prevent tampering. Use Value: Enables secure device identity without cryptographic hardware; WP pin hardens against firmware-level spoofing attempts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC01B/SN | Requires minimum 2.5V VCC; same 400 kHz max clock, 1Kbit density, and SOIC-8 package. | Not suitable for 1.8V systems; otherwise identical functional behavior and pinout. | Select only if system VCC is guaranteed ≥2.5V and cost sensitivity outweighs low-voltage flexibility. |
| AT24C01D-SSHM-T | 1.7–5.5V operation, 1M endurance, but rated for automotive AEC-Q100 Grade 2 (−40°C to +105°C), not extended temp. | Valid for automotive cabin modules but lacks −40°C to +125°C extended range of 24AA01T/SN. | Choose for automotive interior applications where extended temperature is unnecessary and AEC-Q100 compliance is mandated. |
Compared with 24LC01B/SN, 24AA01T/SN enables lower-voltage operation critical for battery-backed systems; versus AT24C01D-SSHM-T, it offers broader industrial temperature coverage but lacks formal AEC-Q100 certification-making it optimal for industrial automation and medical equipment where extended temp and low-voltage robustness are primary requirements.
Availability
24AA01T/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and firmware parameter logging requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 24AA01T/SN 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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing infrastructure.
The 24AA01T/SN belongs to Microchip's 24XX01 family of I²C serial EEPROMs, designed specifically for low-power, space-constrained embedded applications requiring reliable nonvolatile storage with minimal external components.
FAQ
What is the operating voltage range for the 24AA01T/SN?
The 24AA01T/SN operates from 1.7V to 5.5V, enabling compatibility with 1.8V, 3.3V, and 5V logic systems. At voltages below 2.5V, its maximum I²C clock frequency is limited to 100 kHz to maintain timing margin; above 2.5V, it supports up to 400 kHz. This wide VCC range makes the 24AA01T/SN suitable for mixed-voltage designs and battery-powered applications where supply voltage may sag.
Does the 24AA01T/SN require external pull-up resistors on SDA and SCL lines?
Yes, the 24AA01T/SN requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Recommended values are 10 kΩ for 100 kHz operation, 2 kΩ for 400 kHz, and proportionally lower for higher speeds. The exact value depends on bus capacitance and desired rise time; insufficient pull-up strength causes timing violations and communication failures.
How does the write-protect (WP) pin function on the 24AA01T/SN?
When the WP pin of the 24AA01T/SN is tied to VCC, all write operations-including byte, page, and erase-are inhibited; reads remain fully functional. When tied to VSS (or left floating, though not recommended), full read/write access is enabled. This hardware-level protection prevents accidental overwrites during power transitions or software faults, and is independent of I²C commands.
What is the maximum write cycle time for the 24AA01T/SN?
The maximum write cycle time for the 24AA01T/SN is 5 ms for both byte and page writes. This self-timed internal cycle begins after the host issues a Stop condition and cannot be interrupted. During this period, the device does not acknowledge I²C addresses, enabling ACK polling to detect completion-allowing hosts to avoid fixed delays and maximize bus utilization.
Is the 24AA01T/SN pin-compatible with other members of the 24XX01 family?
Yes, the 24AA01T/SN is pin-compatible with 24LC01B/SN and 24FC01/SN in the same SOIC-8 package (SN), sharing identical pinout, VCC, GND, SDA, SCL, WP, and unconnected A0–A2 terminals. However, differences in voltage range (24LC01B requires ≥2.5V), clock speed (24FC01 supports 1 MHz), and temperature grade mean electrical compatibility must be verified per application-not just pin alignment.
24AA01T/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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:
- 3500 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24AA01T/SN FAQ
1.How can I place an order for 24AA01T/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA01T/SN 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 24AA01T/SN reliable?
The price and inventory of 24AA01T/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA01T/SN is usually 5 days.
3.What payment methods are accepted for 24AA01T/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA01T/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA01T/SN?
24AA01T/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA01T/SN 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 24AA01T/SN?
For technical support, including 24AA01T/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA01T/SN requirements.
6.How does Aetrix verify that 24AA01T/SN is sourced from the original manufacturer or authorized distributors?
All 24AA01T/SN 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 24AA01T/SN meets industry standards.
7.What is the process for return or replacement of 24AA01T/SN?
All 24AA01T/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24AA01T/SN, 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 24AA01T/SN part is unused and in its original packaging.
Return procedure for 24AA01T/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA01T/SN Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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