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

Microchip Technology AT24C164-10PI-2.7

Name: AT24C164-10PI-2.7
Brand: Microchip Technology
SKU: AT24C164-10PI-2.7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT24C164-10PI-2.7

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-DIP (0.300", 7.62mm)

Datasheet:: AT24C164-10PI-2.7.pdf

Description:: IC EEPROM 16KBIT I2C 400KHZ 8DIP

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Product details

Overview

AT24C164-10PI-2.7 from Microchip Technology (formerly Atmel) is a 16 Kbit I²C-compatible serial EEPROM organized as 2048 × 8 bits, operating from 2.7V to 5.5V with industrial temperature range (−40°C to +85°C), 10 ms max write cycle time, and 1 million write endurance. It supports cascaded bus configurations up to eight devices and is used for nonvolatile parameter storage in embedded controllers, power management units, and sensor calibration modules.

For engineers reviewing the AT24C164-10PI-2.7 datasheet, AT24C164-10PI-2.7 pinout, AT24C164-10PI-2.7 application, or AT24C164-10PI-2.7 equivalent, key selection considerations include voltage compatibility (2.7V–5.5V), industrial-grade reliability, 16-byte page write capability, hardware write protection via WP pin, and SOIC/PDIP package options for legacy and space-constrained designs.

Technical Context

The AT24C164-10PI-2.7 implements a two-wire I²C interface with open-drain SDA and edge-triggered SCL, supporting 100 kHz clock frequency at 2.7V operation. Its internal address decoder uses A0–A2 pins to select one of eight devices on a shared bus, enabling scalable memory expansion without additional control lines.

It features Schmitt-trigger inputs with noise filtering, bidirectional data transfer with ACK/NACK protocol, and self-timed internal write cycles that disable all inputs until completion. Memory is partitioned into 256 pages of 8 bytes each, with automatic address incrementing during page writes and rollover behavior at page boundaries.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	16 Kbit (2048 × 8 bits), sufficient for storing firmware configuration, calibration coefficients, or device identity data in resource-constrained systems.
Supply Voltage Range	2.7V to 5.5V - enables direct integration with 3.3V and 5V logic domains without level-shifting circuitry.
Interface Speed	100 kHz maximum at 2.7V - ensures reliable communication in electrically noisy industrial environments where higher-speed timing margins are marginal.
Write Endurance	1 million write cycles - supports frequent field-updatable parameters such as energy meter logs or diagnostic counters over product lifetime.
Data Retention	100 years at +25°C - guarantees long-term integrity of stored settings without battery backup or refresh mechanisms.
Operating Temperature	−40°C to +85°C - qualified for use in industrial automation, automotive body control modules, and outdoor telemetry equipment.
Write Cycle Time	10 ms maximum - defines minimum interval between successive write commands; requires software polling or timeout handling before next access.

Pinout & Package

AT24C164-10PI-2.7 is supplied in an 8-pin PDIP (8P3) package with 0.300" width, suitable for through-hole prototyping and legacy production. Pin assignments are standardized across voltage variants and match JEDEC MS-001 BA footprint.

Pin/Terminal	Circuit Role	Design Meaning
A0–A2	Device Address Inputs	Hardwired or driven to VSS/VDD to configure one of eight unique I²C slave addresses (0x50–0x57); enables multi-device bus sharing without address conflict.
SDA	Serial Data I/O	Open-drain bidirectional line requiring external pull-up; supports wire-OR connection with other I²C peripherals on same bus segment.
SCL	Serial Clock Input	Positive-edge clock input for data sampling; negative-edge clock output for data release; must be driven by master only.
WP	Write Protect Control	Active-low hardware lock: tied to GND for normal writes, pulled high to VCC to prevent accidental overwrites during power transitions or firmware faults.
VCC	Power Supply	Primary supply rail (2.7V–5.5V); decoupling capacitor required within 10 mm to suppress switching noise affecting I²C signal integrity.
GND	Ground Reference	Common return path for VCC and all I/O signals; must be low-impedance and separated from noisy digital ground planes in mixed-signal PCB layouts.

Key Features

Feature	Design Value
16-byte Page Write Mode	Reduces firmware overhead by allowing up to 16 sequential bytes to be written per command, cutting write transaction count by 94% vs. byte-by-byte writes for block updates.
Schmitt Trigger Inputs	Provides hysteresis on SCL and SDA lines to reject sub-microsecond noise spikes common in motor-driven or relay-switching industrial enclosures.
Hardware Write Protection	WP pin enables fail-safe locking of critical configuration sectors (e.g., MAC address, security keys) independent of software state or microcontroller reset conditions.
Cascadable Architecture	Supports up to eight AT24C164-10PI-2.7 devices on one I²C bus using A0–A2 address bits - eliminates need for multiplexers or additional GPIOs in modular system designs.
Low Standby Current	4 µA max at 2.7V - extends battery life in always-on IoT nodes or portable diagnostics tools where EEPROM remains powered but idle for >99% of operational time.

Applications

Industrial Sensor Calibration	Embedded Power Management
Use Scenario: Storing factory-trimmed offset/gain coefficients and temperature compensation tables for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during system boot and runtime recalibration; operates at 100 kHz I²C speed synchronized to host MCU's low-power clock domain. Use Value: Eliminates need for external trimming potentiometers or laser calibration, reducing BOM cost and enabling field updates via firmware without hardware modification.	Use Scenario: Holding dynamic power state records (e.g., last shutdown cause, accumulated runtime hours, thermal throttling history) in AC/DC SMPS controllers. IC Role / Device Role / Timing Role: Persistent event logger with guaranteed 1M write cycles; WP pin prevents corruption during brown-out events when VCC drops below 2.7V threshold. Use Value: Enables predictive maintenance analytics and compliance reporting without adding FRAM or flash memory complexity to cost-sensitive power IC designs.
Medical Device Configuration	Automotive Body Control Module
Use Scenario: Saving user-selectable therapy parameters (e.g., infusion rate limits, alarm thresholds) in portable drug delivery pumps with battery-backed operation. IC Role / Device Role / Timing Role: Safety-critical data repository with 100-year retention; accessed only during setup mode or error recovery, minimizing exposure to ESD transients. Use Value: Meets IEC 62304 Class C software requirements for persistent data integrity, avoiding revalidation when replacing main controller MCU due to supply chain shortages.	Use Scenario: Storing seat position memory, mirror angle presets, and lighting profiles in vehicle door modules communicating over LIN-to-I²C bridge ICs. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced via isolated I²C bus; operates reliably across automotive battery range (9V–16V) with external LDO regulation to 2.7V–5.5V window. Use Value: Supports OEM personalization features without increasing CAN bus traffic load or requiring higher-cost automotive-grade flash with complex wear-leveling firmware.

Industrial Sensor Calibration

Embedded Power Management

Use Scenario: Storing factory-trimmed offset/gain coefficients and temperature compensation tables for analog sensor front-ends in programmable logic controllers.

IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during system boot and runtime recalibration; operates at 100 kHz I²C speed synchronized to host MCU's low-power clock domain.

Use Value: Eliminates need for external trimming potentiometers or laser calibration, reducing BOM cost and enabling field updates via firmware without hardware modification.

Use Scenario: Holding dynamic power state records (e.g., last shutdown cause, accumulated runtime hours, thermal throttling history) in AC/DC SMPS controllers.

IC Role / Device Role / Timing Role: Persistent event logger with guaranteed 1M write cycles; WP pin prevents corruption during brown-out events when VCC drops below 2.7V threshold.

Use Value: Enables predictive maintenance analytics and compliance reporting without adding FRAM or flash memory complexity to cost-sensitive power IC designs.

Medical Device Configuration

Automotive Body Control Module

Use Scenario: Saving user-selectable therapy parameters (e.g., infusion rate limits, alarm thresholds) in portable drug delivery pumps with battery-backed operation.

IC Role / Device Role / Timing Role: Safety-critical data repository with 100-year retention; accessed only during setup mode or error recovery, minimizing exposure to ESD transients.

Use Value: Meets IEC 62304 Class C software requirements for persistent data integrity, avoiding revalidation when replacing main controller MCU due to supply chain shortages.

Use Scenario: Storing seat position memory, mirror angle presets, and lighting profiles in vehicle door modules communicating over LIN-to-I²C bridge ICs.

IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced via isolated I²C bus; operates reliably across automotive battery range (9V–16V) with external LDO regulation to 2.7V–5.5V window.

Use Value: Supports OEM personalization features without increasing CAN bus traffic load or requiring higher-cost automotive-grade flash with 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
M95128-WMN6TP	128 Kbit SPI interface, 5 MHz max clock, no built-in WP pin (requires external logic)	Requires SPI-capable MCU and additional GPIO for write protection; better suited for high-throughput logging where I²C bandwidth is limiting	Select when migrating from I²C to SPI architecture or when >16 Kbit density is needed without bus expansion
BR24G16NUX-10	16 Kbit I²C, 1.7V–5.5V supply, 400 kHz at 2.5V+, industrial temp, smaller USON-8 package	Same pinout not supported; requires PCB redesign but offers superior board area efficiency and lower profile for compact modules	Select for new designs prioritizing miniaturization and extended low-voltage operation down to 1.7V

Compared with M95128-WMN6TP and BR24G16NUX-10, the AT24C164-10PI-2.7 provides proven industrial I²C compatibility, hardware WP integration, and PDIP/SOIC drop-in replacement flexibility for legacy systems-making it optimal for maintenance, repair, and sustainment programs where design stability outweighs density or size gains.

Availability

AT24C164-10PI-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded power management, and automotive body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for AT24C164-10PI-2.7 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 is a global semiconductor company specializing in microcontrollers, analog components, and nonvolatile memory solutions, with a focus on reliability, longevity, and industrial-grade qualification.

The AT24C164 series was designed for robust, low-power serial data storage in harsh environments-targeting applications where deterministic write timing, hardware data protection, and multi-vendor interoperability are essential.

FAQ

What is the maximum clock frequency supported by AT24C164-10PI-2.7?

The AT24C164-10PI-2.7 supports up to 100 kHz I²C clock frequency when operating within its 2.7V–5.5V supply range. This limit ensures timing margin compliance under worst-case industrial temperature and voltage conditions, unlike 5V-only variants which support 400 kHz. The 100 kHz rating applies directly to the AT24C164-10PI-2.7 and is verified in the AC Characteristics table of its official datasheet.

Does AT24C164-10PI-2.7 support partial page writes?

Yes, AT24C164-10PI-2.7 supports partial page writes: the device accepts 1 to 16 bytes per write transaction, with internal address incrementing only within the current 8-byte page boundary. If more than 8 bytes are sent, the address rolls over to the start of the same page-enabling flexible firmware updates without full-page erasure. This behavior is explicitly documented in the "Page Write" section of the AT24C164-10PI-2.7 datasheet.

How does the Write Protect (WP) pin function on AT24C164-10PI-2.7?

On AT24C164-10PI-2.7, the WP pin is an active-low hardware lock: when pulled low to GND, normal write operations (byte and page) are enabled; when pulled high to VCC, all write attempts-including those initiated by valid I²C commands-are ignored. This provides deterministic protection against firmware bugs or power glitches, and is a core feature confirmed in the Pin Description and Features sections of the AT24C164-10PI-2.7 datasheet.

What package types are available for AT24C164-10PI-2.7?

AT24C164-10PI-2.7 is offered in two industry-standard packages: 8-lead PDIP (8P3, 0.300" wide) and 8-lead JEDEC SOIC (8S1, 0.150" wide). Both share identical pinout and electrical characteristics. The "PI" suffix denotes industrial temperature grade (−40°C to +85°C), and the "-2.7" suffix confirms 2.7V–5.5V operation-details confirmed in the Ordering Information table of the AT24C164-10PI-2.7 datasheet.

Is AT24C164-10PI-2.7 compatible with standard I²C protocol?

Yes, AT24C164-10PI-2.7 fully complies with standard I²C protocol: it uses 7-bit addressing with R/W bit, supports START/STOP conditions, acknowledges each byte with a 9th-cycle low pulse, and implements clock stretching during internal write cycles. Its SDA/SCL timing parameters (tLOW, tHIGH, tSU.STA, etc.) meet I²C specification requirements for standard-mode (100 kHz) operation, as validated in the AC Characteristics table for the AT24C164-10PI-2.7.

AT24C164-10PI-2.7 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: EEPROM

Technology:: EEPROM

Memory Size:: 16Kbit

Memory Organization:: 2K x 8

Memory Interface:: I2C

Clock Frequency:: 400 kHz

Write Cycle Time - Word, Page:: 10ms

Access Time:: 900 ns

Voltage - Supply:: 2.7V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 8-PDIP

AT24C164-10PI-2.7 FAQ

1.How can I place an order for AT24C164-10PI-2.7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AT24C164-10PI-2.7 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 AT24C164-10PI-2.7 reliable?

The price and inventory of AT24C164-10PI-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C164-10PI-2.7 is usually 5 days.

3.What payment methods are accepted for AT24C164-10PI-2.7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C164-10PI-2.7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT24C164-10PI-2.7?

AT24C164-10PI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT24C164-10PI-2.7 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 AT24C164-10PI-2.7?

For technical support, including AT24C164-10PI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C164-10PI-2.7 requirements.

6.How does Aetrix verify that AT24C164-10PI-2.7 is sourced from the original manufacturer or authorized distributors?

All AT24C164-10PI-2.7 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 AT24C164-10PI-2.7 meets industry standards.

7.What is the process for return or replacement of AT24C164-10PI-2.7?

All AT24C164-10PI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C164-10PI-2.7, 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 AT24C164-10PI-2.7 part is unused and in its original packaging.

Return procedure for AT24C164-10PI-2.7:

1.Submit a request within 90 days.

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

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