AT93C56-10PI EEPROM Equivalent & Substitute Parts

Part Overview

The AT93C56-10PI is a 2Kbit non-volatile EEPROM memory IC manufactured by Microchip Technology, featuring a 3-Wire Serial interface and 2 MHz clock frequency in an 8-DIP through-hole package. This device is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The part operates across a 4.5V to 5.5V supply range with a 10ms write cycle time and supports memory organization of 256 x 8 or 128 x 16 bits.

Substiute Parts

AT93C56-10PI

Microchip TechnologyIn Stock: 879AT93C56-10PI Datasheet

Current PartRFQ

93AA56C-I/P

Microchip TechnologyIn Stock: 101693AA56C-I/P Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT93C56-10PI is determined by the following critical parameters:

• Memory capacity (2Kbit) and organization (256 x 8, 128 x 16)
• Non-volatile EEPROM technology
• Serial interface protocol compatibility
• Package form factor (8-DIP through-hole)
• Operating temperature range (-40°C ~ 85°C)
• Supply voltage compatibility

The 93AA56C-I/P qualifies as a direct substitute based on matching memory size, organization, package type, and operating temperature range. While the substitute features an enhanced Microwire interface (compatible with 3-Wire Serial protocol), wider supply voltage range (1.8V ~ 5.5V), and faster clock frequency (3 MHz), these represent functional improvements rather than incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

The 93AA56C-I/P is the qualified substitute for the obsolete AT93C56-10PI. Selection is justified by:

• Identical memory capacity and organization matching the original specification
• Pin-compatible 8-DIP package enabling direct board-level replacement
• Matching operating temperature range ensuring thermal compatibility
• Active product status providing long-term availability and supply continuity
• ROHS3 compliance meeting current environmental and regulatory requirements
• Enhanced performance characteristics (faster clock frequency, reduced write cycle time, extended supply voltage range) providing design margin without introducing incompatibilities

Frequently Asked Questions (FAQ)

Q: Can the 93AA56C-I/P directly replace the AT93C56-10PI on existing PCBs?

A: Yes. Both devices use identical 8-DIP through-hole packaging with matching pinouts, enabling direct board-level substitution without layout modifications.

Q: Are there interface protocol differences between the two parts?

A: The AT93C56-10PI uses 3-Wire Serial protocol, while the 93AA56C-I/P uses Microwire protocol. Microwire is compatible with 3-Wire Serial implementations, allowing functional substitution in existing circuits.

Q: What are the supply voltage considerations for substitution?

A: The original part operates at 4.5V ~ 5.5V. The substitute accepts 1.8V ~ 5.5V, providing broader voltage compatibility. Circuits designed for the original 4.5V ~ 5.5V range operate without modification.

Q: How do the write cycle times compare?

A: The AT93C56-10PI specifies 10ms write cycle time, while the 93AA56C-I/P specifies 6ms. The faster write performance of the substitute does not create incompatibility with existing firmware or timing-dependent code.

Q: What is the significance of the product status change from Obsolete to Active?

A: The substitute's active status ensures continued manufacturing, availability, and technical support, eliminating supply chain risk associated with obsolete components.

Q: Are there RoHS compliance implications?

A: The original part is RoHS non-compliant, while the substitute is ROHS3 compliant. For new designs or applications requiring regulatory compliance, the substitute meets current environmental standards.