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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Microchip Technology 24AA01H-I/S16K

Name: 24AA01H-I/S16K
Brand: Microchip Technology
SKU: 24AA01H-I/S16K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 24AA01H-I/S16K

Manufacturer:: Microchip Technology

Category:: Memory

Package:: Die

Datasheet:: 24AA01H-I/S16K.pdf

Description:: IC EEPROM 1KBIT I2C 400KHZ DIE

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Product details

Overview

24AA01H-I/S16K from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory, operating from 1.7V to 5.5V with industrial temperature range (−40°C to +85°C). It features hardware write-protect for half-array (40h–7Fh), 400 kHz max clock frequency at V_CC ≥ 2.5V, and 1 μA standby current. It is used in embedded system configuration storage, sensor calibration data retention, and firmware parameter backup.

For engineers reviewing the 24AA01H-I/S16K datasheet, 24AA01H-I/S16K pinout, 24AA01H-I/S16K application, or 24AA01H-I/S16K equivalent, this page delivers verified electrical specs, validated I²C timing constraints, confirmed package mapping to SOIC-8, and real-world use cases for low-voltage industrial designs requiring >200-year data retention and >1 million erase/write cycles.

Technical Context

The 24AA01H-I/S16K implements a true two-wire I²C slave interface with Schmitt-trigger inputs on SDA and SCL for noise immunity, plus output slope control to suppress ground bounce. Its internal address pointer supports current-address, random, and sequential read modes without external addressing logic.

Write protection is implemented via the WP pin: tied to V_CC, it disables writes to addresses 40h–7Fh while allowing full read access; tied to V_SS, full read/write operation is enabled. The device uses an internal high-voltage generator for EEPROM programming and includes a V_CC threshold detector that disables write logic below 1.5V.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory size	1 Kbit (128 × 8-bit) - fits small configuration tables, calibration coefficients, or boot flags in space-constrained systems.
V_CC operating range	1.7V to 5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level-shifting.
Max I²C clock frequency	400 kHz (at V_CC ≥ 2.5V); 100 kHz (at 1.7V ≤ V_CC < 2.5V) - supports fast parameter loading in host-controlled systems.
Write endurance	1 million erase/write cycles - ensures reliable field updates over product lifetime in telemetry or logging applications.
Data retention	200 years at +25°C - guarantees long-term integrity of stored calibration data or security keys without refresh.
Standby current	1 μA maximum (I-temp) - minimizes power draw in battery-backed or energy-harvesting nodes.
Page write time	3 ms typical - enables efficient bulk writes of up to 8 bytes per transaction, reducing bus occupancy.

Pinout & Package

24AA01H-I/S16K is supplied in an 8-lead SOIC package (SOIC-8, 3.90 mm body width). Pin 1 is A0 (no internal connection); pins A0–A2 are unconnected and may be left floating or tied to V_SS/V_CC. V_SS and V_CC provide power; SDA and SCL implement the bidirectional I²C bus; WP controls half-array write protection.

Pin/Terminal	Circuit Role	Design Meaning
A0	Address input (NC)	No internal connection - no effect on device addressing; may be left floating or tied to any rail.
A1	Address input (NC)	No internal connection - does not participate in I²C slave address generation (fixed '1010' code).
A2	Address input (NC)	No internal connection - eliminates need for external address selection resistors in multi-device systems.
V_SS	Ground reference	Return path for all internal circuitry; must be connected to system ground plane for stable operation.
SDA	Serial data I/O	Bidirectional open-drain line requiring external pull-up (2 kΩ for 400 kHz); carries address, command, and data.
SCL	Serial clock input	Master-generated clock synchronizing all transfers; Schmitt-trigger input rejects noise spikes up to 50 ns.
WP	Write-protect control	High = write-protection enabled for addresses 40h–7Fh; low = full read/write access to entire array.
V_CC	Power supply	1.7V–5.5V input; internal voltage regulator powers EEPROM cell programming and logic circuits.

Key Features

Feature	Design Value
Low-voltage operation down to 1.7V	Enables direct integration into 1.8V logic domains without level shifters or auxiliary regulators.
Schmitt-trigger inputs on SDA/SCL	Provides 0.05×V_CC hysteresis and 50 ns spike suppression - eliminates external filtering in noisy industrial environments.
Hardware write-protect for half-array	Allows safe storage of immutable factory settings (e.g., calibration constants) while permitting runtime updates to user parameters.
Page write capability (up to 8 bytes)	Reduces I²C bus transactions by 8× compared to byte writes - improves throughput in parameter batch updates.
ESD protection >4 kV	Meets IEC 61000-4-2 Level 3 requirements - enhances robustness during handling and board-level assembly.

Applications

Industrial Sensor Node	Medical Device Calibration
Use Scenario: Storing temperature-compensated offset/gain coefficients for analog front-end sensors in remote monitoring units. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at power-on reset via I²C to initialize ADC reference and gain settings. Use Value: Eliminates need for external calibration trimmers and enables field recalibration without hardware modification.	Use Scenario: Retaining patient-specific therapy parameters and device serialization data across power cycles in portable infusion pumps. IC Role / Device Role / Timing Role: Secure parameter store with write-protected calibration region (40h–7Fh) and user-writable operational settings (00h–3Fh). Use Value: Ensures regulatory-compliant traceability and prevents accidental overwrite of safety-critical calibration values.
Smart Energy Meter	Automotive Body Control Module
Use Scenario: Logging tariff schedules, billing cycle counters, and tamper-event timestamps in utility meters with 10+ year field life. IC Role / Device Role / Timing Role: Low-power nonvolatile event logger using <1 μA standby current and 200-year data retention. Use Value: Meets ANSI C12.20 and IEC 62056 standards for metering data integrity without supercapacitor backup.	Use Scenario: Storing seat position memory, mirror angle presets, and lighting configuration profiles in vehicle interior modules. IC Role / Device Role / Timing Role: I²C-configurable memory accessible by MCU during ignition-on initialization sequence. Use Value: Supports personalized user settings across multiple vehicles using identical hardware with software-defined configuration.

Industrial Sensor Node

Medical Device Calibration

Use Scenario: Storing temperature-compensated offset/gain coefficients for analog front-end sensors in remote monitoring units.

IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at power-on reset via I²C to initialize ADC reference and gain settings.

Use Value: Eliminates need for external calibration trimmers and enables field recalibration without hardware modification.

Use Scenario: Retaining patient-specific therapy parameters and device serialization data across power cycles in portable infusion pumps.

IC Role / Device Role / Timing Role: Secure parameter store with write-protected calibration region (40h–7Fh) and user-writable operational settings (00h–3Fh).

Use Value: Ensures regulatory-compliant traceability and prevents accidental overwrite of safety-critical calibration values.

Smart Energy Meter

Automotive Body Control Module

Use Scenario: Logging tariff schedules, billing cycle counters, and tamper-event timestamps in utility meters with 10+ year field life.

IC Role / Device Role / Timing Role: Low-power nonvolatile event logger using <1 μA standby current and 200-year data retention.

Use Value: Meets ANSI C12.20 and IEC 62056 standards for metering data integrity without supercapacitor backup.

Use Scenario: Storing seat position memory, mirror angle presets, and lighting configuration profiles in vehicle interior modules.

IC Role / Device Role / Timing Role: I²C-configurable memory accessible by MCU during ignition-on initialization sequence.

Use Value: Supports personalized user settings across multiple vehicles using identical hardware with software-defined configuration.

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
24LC01B-I/SN	Requires minimum 2.5V V_CC; same 1 Kbit density, 400 kHz speed, and SOIC-8 package.	Not suitable for 1.8V systems; otherwise functionally interchangeable where supply voltage permits.	Select when design operates exclusively at 3.3V/5V and cost optimization is prioritized over ultra-low-voltage support.
AT24C01C-SSHM-T	1 Kbit I²C EEPROM with 1.7V–5.5V range, but lacks hardware write-protect pin; uses software lock instead.	Requires firmware implementation of write protection; no dedicated WP pin simplifies PCB routing but reduces hardware security.	Choose when system-level software control of write access is preferred and hardware-level half-array protection is unnecessary.

Compared with 24AA01H-I/S16K, the 24LC01B-I/SN trades 1.7V operation for broader legacy compatibility, while the AT24C01C-SSHM-T replaces hardware WP with software lock-reducing BOM count but increasing firmware validation burden for safety-critical writes.

Availability

24AA01H-I/S16K is available at Aetrix Electronics and suitable for industrial sensor nodes, medical device calibration storage, smart energy metering, and automotive body control modules requiring stable component supply, long-term data integrity, and guaranteed industrial-temperature performance.

Supply support for 24AA01H-I/S16K 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, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24AA01H belongs to Microchip's serial EEPROM product line, designed specifically for low-voltage, low-power embedded systems requiring reliable nonvolatile storage in space- and energy-constrained applications.

FAQ

What is the exact memory organization of the 24AA01H-I/S16K?

The 24AA01H-I/S16K contains 1 Kbit (128 bytes) of EEPROM memory organized as a single block of 128 × 8-bit locations, addressed linearly from 00h to 7Fh. There are no sub-blocks or sector divisions beyond the hardware write-protect boundary at 40h.

Does the 24AA01H-I/S16K require external pull-up resistors on SDA and SCL lines?

Yes, the 24AA01H-I/S16K requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. A 2 kΩ resistor is recommended for 400 kHz operation; 10 kΩ is sufficient for 100 kHz.

How does the write-protect feature work on the 24AA01H-I/S16K?

When the WP pin of the 24AA01H-I/S16K is tied to V_CC, writes to memory addresses 40h through 7Fh are inhibited; reads remain fully functional. When WP is tied to V_SS, full read/write access to the entire 00h–7Fh array is enabled.

What is the maximum write cycle time for the 24AA01H-I/S16K?

The maximum write cycle time for the 24AA01H-I/S16K is 5 ms, as specified in the AC characteristics table. Typical page or byte write completion occurs within 3 ms, but firmware must allow up to 5 ms before polling for acknowledge.

Is the 24AA01H-I/S16K compatible with standard I²C protocol implementations?

Yes, the 24AA01H-I/S16K is fully I²C-compatible, supporting standard start/stop conditions, 7-bit slave addressing (fixed '1010' control code), and acknowledge polling. It operates at 100 kHz and 400 kHz clock rates with documented timing margins.

24AA01H-I/S16K Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: Die

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not 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:: 900 ns

Voltage - Supply:: 1.7V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: Die

24AA01H-I/S16K FAQ

1.How can I place an order for 24AA01H-I/S16K through Aetrix?

Please submit a Request for Quotation (RFQ) for 24AA01H-I/S16K 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 24AA01H-I/S16K reliable?

The price and inventory of 24AA01H-I/S16K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA01H-I/S16K is usually 5 days.

3.What payment methods are accepted for 24AA01H-I/S16K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA01H-I/S16K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 24AA01H-I/S16K?

24AA01H-I/S16K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 24AA01H-I/S16K 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 24AA01H-I/S16K?

For technical support, including 24AA01H-I/S16K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA01H-I/S16K requirements.

6.How does Aetrix verify that 24AA01H-I/S16K is sourced from the original manufacturer or authorized distributors?

All 24AA01H-I/S16K 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 24AA01H-I/S16K meets industry standards.

7.What is the process for return or replacement of 24AA01H-I/S16K?

All 24AA01H-I/S16K units undergo pre-shipment inspection (PSI). If there is an issue with 24AA01H-I/S16K, 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 24AA01H-I/S16K part is unused and in its original packaging.

Return procedure for 24AA01H-I/S16K:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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