AT24C164-10PI-1.8 Equivalent & Substitute Parts

Part Overview

The AT24C164-10PI-1.8 is a 16Kbit EEPROM memory IC with I2C interface operating at 400 kHz, manufactured by Microchip Technology. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design requirements and production continuity. The part is designed for applications requiring non-volatile memory storage with I2C serial communication in 8-DIP through-hole packaging.

Substiute Parts

AT24C164-10PI-1.8

Microchip TechnologyIn Stock: 811AT24C164-10PI-1.8 Datasheet

Current PartRFQ

24AA16H-I/P

Microchip TechnologyIn Stock: 93124AA16H-I/P Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT24C164-10PI-1.8 is determined by the following critical parameters:

• Memory capacity (16Kbit) and organization (2K x 8)
• I2C serial interface at 400 kHz operation
• Access time specification (900 ns)
• Package type (8-DIP through-hole)
• Operating temperature range (-40°C ~ 85°C)
• Supply voltage compatibility

The 24AA16H-I/P meets all these core requirements and is classified as an active product, making it a direct functional equivalent for the obsolete AT24C164-10PI-1.8.

Parameter Comparison

Engineering Selection Recommendations

The 24AA16H-I/P is the appropriate substitute for the obsolete AT24C164-10PI-1.8 based on the following factors:

• Functional equivalence across all critical memory and interface parameters
• Active product status ensures ongoing availability and supply chain continuity
• ROHS3 compliance of the 24AA16H-I/P meets current regulatory requirements, whereas the original part is non-compliant
• Improved write cycle time (5ms versus 10ms) provides performance enhancement
• Extended lower voltage tolerance (1.7V minimum) offers broader operational flexibility
• Identical package and pinout enable direct board-level substitution without redesign

Frequently Asked Questions (FAQ)

Q: Can the 24AA16H-I/P be used as a direct replacement for AT24C164-10PI-1.8 without circuit modification?

A: Yes. Both parts share identical memory capacity, I2C interface specifications, access time, operating temperature range, and 8-DIP package configuration. Pin-for-pin compatibility is maintained, allowing direct substitution on existing PCB layouts.

Q: What are the differences between these two parts?

A: The primary differences are product status (obsolete versus active), RoHS compliance (non-compliant versus ROHS3 compliant), write cycle time (10ms versus 5ms), and minimum supply voltage (1.8V versus 1.7V). The 24AA16H-I/P offers improved performance and regulatory compliance.

Q: Are there any voltage supply considerations when substituting?

A: The 24AA16H-I/P operates across 1.7V to 5.5V, compared to the original part's 1.8V to 5.5V range. This represents an improvement in lower voltage tolerance. Both parts are compatible with standard 3.3V and 5V supply systems.

Q: Does the faster write cycle time of the 24AA16H-I/P affect system compatibility?

A: No. The 24AA16H-I/P's 5ms write cycle time is faster than the original 10ms specification. Systems designed for the slower write cycle will operate correctly with the faster substitute without modification.

Q: What is the significance of RoHS3 compliance for the substitute part?

A: ROHS3 compliance indicates the 24AA16H-I/P meets current European Union Restriction of Hazardous Substances regulations. This is essential for products destined for EU markets and represents a regulatory advantage over the non-compliant original part.

Q: Is the 8-PDIP package identical between both parts?

A: Yes. Both parts use the 8-DIP (0.300", 7.62mm) through-hole package with identical pinout and mechanical dimensions, ensuring direct PCB compatibility.