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Microchip Technology AT24C164-10PI-2.5
- Part No.:
- AT24C164-10PI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C164-10PI-2.5.pdf
- Description:
- IC EEPROM 16KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,056
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Product details
Overview
AT24C164-10PI-2.5 from Microchip Technology (formerly Atmel) is a 16K-bit (2048 × 8) two-wire serial EEPROM optimized for low-voltage industrial systems. It operates from 2.5V to 5.5V, supports 100 kHz I²C bus speed, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention in an 8-pin PDIP package.
For engineers reviewing the AT24C164-10PI-2.5 datasheet, AT24C164-10PI-2.5 pinout, AT24C164-10PI-2.5 application, or AT24C164-10PI-2.5 equivalent, key selection criteria include industrial temperature range (–40°C to +85°C), 2.5V minimum supply compatibility, page-write capability (16-byte), Schmitt-trigger inputs for noise immunity, and cascading support for up to eight devices on one I²C bus.
Technical Context
The AT24C164-10PI-2.5 implements a standard I²C-compatible two-wire interface with open-drain SDA and edge-triggered SCL, supporting both byte and 16-byte page writes. Its internal address counter enables sequential reads across memory boundaries, while device-select pins A0–A2 allow up to eight devices on a shared bus.
It uses a self-timed internal write cycle (max 10 ms), requires no external timing components, and incorporates Schmitt-trigger inputs with noise filtering - critical for reliable operation in electrically noisy industrial environments. The WP pin provides hardware-level write inhibition independent of software control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8 bits), organized in 256 pages of 8 bytes each - enables efficient block-level access and partial-page updates. |
| Supply Voltage Range | 2.5V to 5.5V - supports direct integration into 2.5V logic domains without level-shifting. |
| I²C Bus Speed | 100 kHz max at 2.5V - ensures timing compliance under low-voltage operation with defined tLOW/tHIGH minima. |
| Write Endurance | 1 million write cycles - guarantees long-term reliability in firmware parameter storage or calibration logging. |
| Data Retention | 100 years at +25°C - suitable for applications requiring archival-grade nonvolatile storage without refresh. |
| Operating Temperature | –40°C to +85°C (Industrial grade) - validated for deployment in motor drives, PLCs, and outdoor metering equipment. |
| ESD Protection | >3,000 V HBM - reduces risk of field failure during handling or system-level ESD events. |
Pinout & Package
AT24C164-10PI-2.5 is supplied in an 8-lead, 0.300" wide plastic dual in-line package (PDIP), JEDEC MS-001 BA compliant, with 0.100" lead pitch and through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Device Address Inputs | Hardwired or driven to VSS/VDD to select one of eight possible addresses on shared I²C bus - enables multi-device topology without address conflict. |
| SDA | Serial Data I/O | Open-drain bidirectional line - requires external pull-up; supports wire-OR with other I²C devices and ACK/NACK signaling. |
| SCL | Serial Clock Input | Positive-edge clock input for data sampling - defines timing window for valid data setup/hold on SDA. |
| WP | Write Protect | Active-low hardware lock - when tied to GND, enables writes; when high, blocks all write operations regardless of command sequence. |
| VCC | Power Supply | Primary power rail (2.5V–5.5V); powers internal logic and memory array - decoupling capacitor required per layout guidelines. |
| GND | Ground Reference | Signal and power return path - must be low-impedance and separated from noisy digital ground where mixed-signal integrity is critical. |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte Page Write Mode | Reduces firmware overhead by enabling burst programming of aligned 16-byte blocks - cuts write time vs. 2048 individual byte writes. |
| Schmitt Trigger, Filtered Inputs | Rejects sub-100 ns noise spikes on SCL/SDA - eliminates false start/stop detection in electrically harsh environments like factory floors. |
| Cascadable Architecture | Supports up to eight AT24C164-10PI-2.5 devices on one I²C bus using A0–A2 - simplifies BOM consolidation and scalable memory expansion. |
| Self-Timed Write Cycle (10 ms max) | Eliminates need for external write-complete polling delay - microcontroller can proceed to other tasks after issuing STOP condition. |
| Hardware Write Protection (WP Pin) | Provides fail-safe write blocking independent of firmware state - prevents corruption during brown-out or reset sequences. |
Applications
| Industrial Sensor Calibration Storage | PLC Configuration Memory |
|---|---|
|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during power-up initialization and runtime correction routines. Use Value: Enables traceable, field-updatable calibration without requiring reprogramming of main MCU flash - preserves MCU resources and simplifies certification. |
Use Scenario: Holding user-defined I/O mapping, scan cycle timing, and alarm thresholds in modular industrial PLCs. IC Role / Device Role / Timing Role: Persistent configuration register bank accessible over I²C during boot and runtime reconfiguration. Use Value: Allows hot-swappable I/O modules to retain settings across power cycles and firmware upgrades - improves system uptime and serviceability. |
| Smart Meter Firmware Parameter Table | Motor Drive Fault Log Archive |
|
Use Scenario: Storing tariff schedules, billing constants, and communication protocol parameters in ANSI C12.19-compliant electricity meters. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter repository with hardware write lock (WP pin grounded only during update). Use Value: Meets regulatory requirements for parameter immutability between utility updates - prevents unauthorized rate manipulation. |
Use Scenario: Recording thermal overload events, overcurrent trips, and encoder error codes in servo drive inverters. IC Role / Device Role / Timing Role: Circular fault log buffer written via page mode during interrupt-driven fault capture. Use Value: Survives catastrophic power loss due to 100-year retention - enables root-cause analysis even after extended downtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C16C-SSHM-T | Same 16K-bit density and 2.5V–5.5V range, but SOIC-8 package (8S1) and commercial temp (0°C to +70°C). | Lacks industrial temperature rating and PDIP packaging - unsuitable for extended ambient or through-hole assembly. | Select only if board uses surface-mount layout and operates within commercial temperature envelope. |
| BR24G16NUX-2.5TR | Rohm 16K-bit I²C EEPROM with identical 2.5V–5.5V range and 100 kHz speed, but different A0–A2 addressing logic and no WP pin. | Requires software-based write protection; lacks hardware lock - increases firmware complexity and security risk. | Choose only when A0–A2 pin compatibility is verified and WP functionality is implemented externally or omitted. |
Compared with AT24C164-10PI-2.5, AT24C16C-SSHM-T trades industrial reliability for compact packaging, while BR24G16NUX-2.5TR removes hardware write protection - making AT24C164-10PI-2.5 the sole option meeting full industrial spec, PDIP fit, and hardware-enforced data integrity.
Availability
AT24C164-10PI-2.5 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and motor control applications requiring stable component supply, long-lifecycle assurance, and through-hole manufacturability.
Supply support for AT24C164-10PI-2.5 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, FPGA, and memory solutions, with a focus on industrial, automotive, and communications markets.
The AT24C164-10PI-2.5 belongs to Microchip's legacy serial EEPROM product line, designed specifically for robust, low-power, I²C-based nonvolatile storage in harsh industrial environments.
FAQ
What is the maximum I²C clock frequency supported by AT24C164-10PI-2.5?
The AT24C164-10PI-2.5 supports up to 100 kHz I²C clock frequency when operating at 2.5V. This is specified in its AC characteristics table and validated across the full industrial temperature range (–40°C to +85°C). It does not support 400 kHz at 2.5V - that speed is only guaranteed for 5.0V operation per the original Atmel datasheet.
Does AT24C164-10PI-2.5 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C164-10PI-2.5 requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is a CMOS input. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time - values must comply with I²C specification timing constraints for 100 kHz operation.
Can AT24C164-10PI-2.5 be used in place of AT24C164-10PI-2.7?
No - AT24C164-10PI-2.5 and AT24C164-10PI-2.7 are distinct variants with different minimum supply voltage specifications. AT24C164-10PI-2.5 guarantees operation down to 2.5V, while AT24C164-10PI-2.7 requires ≥2.7V. Substituting one for the other risks functional failure below 2.7V, and datasheet timing parameters are validated separately per voltage grade.
How many devices can share the same I²C bus with AT24C164-10PI-2.5?
Up to eight AT24C164-10PI-2.5 devices can share a single I²C bus using the A0, A1, and A2 address pins. Each combination of these three pins sets a unique 3-bit device address, allowing unambiguous addressing without software arbitration - essential for modular industrial backplane designs.
What is the purpose of the WP pin on AT24C164-10PI-2.5?
The WP (Write Protect) pin on AT24C164-10PI-2.5 provides hardware-level write inhibition: when pulled high (typically to VCC), it disables all write operations including byte, page, and erase commands - preventing accidental or malicious modification of stored data even if firmware is compromised or misconfigured.
AT24C164-10PI-2.5 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:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C164-10PI-2.5 FAQ
1.How can I place an order for AT24C164-10PI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C164-10PI-2.5 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-2.5 reliable?
The price and inventory of AT24C164-10PI-2.5 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-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C164-10PI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C164-10PI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C164-10PI-2.5?
AT24C164-10PI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C164-10PI-2.5 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-2.5?
For technical support, including AT24C164-10PI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C164-10PI-2.5 requirements.
6.How does Aetrix verify that AT24C164-10PI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C164-10PI-2.5 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-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C164-10PI-2.5?
All AT24C164-10PI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C164-10PI-2.5, 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-2.5 part is unused and in its original packaging.
Return procedure for AT24C164-10PI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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