93LC46-I/P EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93LC46-I/P is a 1Kbit non-volatile EEPROM memory integrated circuit manufactured by Microchip Technology. This device operates using the Microwire serial interface protocol and is housed in an 8-pin DIP package suitable for through-hole mounting applications. The part is currently active in production with full RoHS3 compliance and REACH unaffected status.

Substitute parts are identified when equivalent memory capacity, interface compatibility, package form factor, and electrical operating parameters align with the original specification. Alternative devices may offer enhanced performance characteristics such as increased clock frequency or reduced write cycle times while maintaining functional interchangeability within the specified voltage and temperature operating ranges.

Substiute Parts

93LC46-I/P

Microchip TechnologyIn Stock: 537193LC46-I/P Datasheet

Current PartRFQ

93LC46C-I/P

Microchip TechnologyIn Stock: 208193LC46C-I/P Datasheet

MFR RecommendedRFQ

AT93C46D-PU

Microchip TechnologyIn Stock: 250303AT93C46D-PU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 93LC46-I/P are identified based on the following critical parameters:

Primary Compatibility Criteria:

• Memory capacity: 1Kbit
• Memory organization: 128 x 8 or 64 x 16 configuration
• Package form factor: 8-DIP through-hole mounting
• Voltage supply range: Minimum 2.5V operation required
• Operating temperature range: -40°C to 85°C
• Non-volatile EEPROM technology

Interface Compatibility: The 93LC46-I/P utilizes Microwire serial interface protocol. Substitute parts must support either Microwire or 3-Wire Serial interface protocols, as these are compatible serial communication standards for this memory category.

Compliance Requirements: All substitute parts maintain RoHS3 compliance, REACH unaffected status, and MSL Level 1 (unlimited moisture sensitivity rating).

Parameter Comparison

Engineering Selection Recommendations

93LC46C-I/P Selection Criteria: The 93LC46C-I/P is a direct Microchip Technology manufacturer-recommended substitute maintaining identical Microwire interface protocol and package specifications. This part operates at 3 MHz clock frequency with 6ms write cycle time, providing improved performance over the original 93LC46-I/P. Voltage supply range remains 2.5V to 5.5V with identical operating temperature specifications. Selection of this part is appropriate when enhanced write performance is required within existing Microwire-based circuit designs.

AT93C46D-PU Selection Criteria: The AT93C46D-PU is a Microchip Technology manufacturer-recommended substitute with identical 1Kbit capacity and 8-DIP package configuration. This device implements 3-Wire Serial interface protocol rather than Microwire, requiring circuit interface compatibility verification. The AT93C46D-PU operates across an extended voltage supply range of 1.8V to 5.5V and provides the fastest write cycle time of 5ms among available substitutes. Selection of this part is appropriate for applications requiring low-voltage operation or maximum write performance, provided the circuit design accommodates 3-Wire Serial protocol.

All substitute parts maintain active production status, full RoHS3 compliance, and REACH unaffected regulatory standing.

Frequently Asked Questions (FAQ)

Q: Can the 93LC46C-I/P directly replace the 93LC46-I/P in existing circuit designs?

A: Yes. The 93LC46C-I/P maintains identical Microwire serial interface protocol, 8-DIP package form factor, and voltage supply range (2.5V to 5.5V). Pin configuration and functional operation are compatible. The primary difference is increased clock frequency (3 MHz versus 2 MHz) and reduced write cycle time (6ms versus 10ms), which represent performance enhancements without functional incompatibility.

Q: What is the primary difference between the 93LC46-I/P and AT93C46D-PU?

A: The primary difference is the serial interface protocol. The 93LC46-I/P uses Microwire protocol, while the AT93C46D-PU uses 3-Wire Serial protocol. Both devices share identical 1Kbit memory capacity, 8-DIP package, and -40°C to 85°C operating temperature range. The AT93C46D-PU supports extended low-voltage operation (1.8V minimum) and offers faster write cycle time (5ms).

Q: Is the AT93C46D-PU compatible with Microwire circuit designs?

A: The AT93C46D-PU implements 3-Wire Serial interface protocol, which differs from Microwire protocol used in the original 93LC46-I/P design. Circuit interface compatibility depends on whether the host controller supports 3-Wire Serial protocol. Direct pin-for-pin substitution without circuit modification is not guaranteed.

Q: Do all substitute parts maintain the same package dimensions?

A: Yes. The 93LC46-I/P, 93LC46C-I/P, and AT93C46D-PU all use 8-DIP package with 0.300" (7.62mm) body width, suitable for identical through-hole mounting on printed circuit boards.

Q: What is the voltage supply range compatibility across all parts?

A: The 93LC46-I/P and 93LC46C-I/P operate at 2.5V to 5.5V. The AT93C46D-PU extends the minimum voltage to 1.8V, supporting 1.8V to 5.5V operation. All parts support standard 5V and 3.3V supply voltages.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The 93LC46-I/P, 93LC46C-I/P, and AT93C46D-PU are all RoHS3 compliant with MSL Level 1 (unlimited) moisture sensitivity rating and REACH unaffected status.