Equivalent & Substitute Parts for 93LC56AT/SN

Part Overview

The 93LC56AT/SN is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring Microwire serial interface protocol with 2 MHz clock frequency. This non-volatile memory device is designed for applications requiring persistent data storage in embedded systems and industrial equipment. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical specifications, memory capacity, interface protocol, and package form factor are maintained across alternative part numbers or packaging configurations.

Key Parameters

Parameter	Specification
Memory Type	Non-Volatile EEPROM
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	Microwire
Clock Frequency	2 MHz
Write Cycle Time	6ms
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 93LC56AT/SN is determined by strict equivalence in the following parameters: memory capacity (2Kbit), memory organization (256 x 8), interface protocol (Microwire), clock frequency (2 MHz), write cycle time (6ms), package type (8-SOIC), and mounting method (Surface Mount). All identified substitutes maintain these core electrical and mechanical specifications. Variations in supply voltage range, operating temperature range, and packaging format (Tape & Reel, Tube, Cut Tape) do not affect functional interchangeability when these key parameters remain constant. RoHS3 compliance and MSL rating are consistent across all substitute options.

Parameter Comparison

Parameter	93LC56AT/SN	93LC56A/SN	93AA56AT-I/SN	93LC56AT-I/SN
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology
Memory Type	Non-Volatile EEPROM	Non-Volatile EEPROM	Non-Volatile EEPROM	Non-Volatile EEPROM
Memory Size	2Kbit	2Kbit	2Kbit	2Kbit
Memory Organization	256 x 8	256 x 8	256 x 8	256 x 8
Memory Interface	Microwire	Microwire	Microwire	Microwire
Clock Frequency	2 MHz	2 MHz	2 MHz	2 MHz
Write Cycle Time	6ms	6ms	6ms	6ms
Voltage - Supply	2.5V ~ 5.5V	2.5V ~ 5.5V	1.8V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Packaging Format	Tape & Reel (TR)	Tube	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All four parts maintain active product status with ROHS3 compliance and verified programmability through DiGi-Electronics. Selection between 93LC56AT/SN and its substitutes depends on application-specific requirements for supply voltage range and operating temperature range.

The 93LC56AT/SN and 93LC56A/SN are functionally equivalent with identical voltage (2.5V ~ 5.5V) and temperature (0°C ~ 70°C) specifications. The primary distinction is packaging format: Tape & Reel versus Tube. Selection between these two is driven by assembly process requirements and inventory management practices.

The 93AA56AT-I/SN offers extended operating temperature range (-40°C ~ 85°C) and lower minimum supply voltage (1.8V) compared to the 93LC56AT/SN. This part is suitable for applications requiring operation in wider environmental conditions or lower voltage systems.

The 93LC56AT-I/SN provides extended operating temperature range (-40°C ~ 85°C) while maintaining the 2.5V minimum supply voltage of the original part. This option is appropriate for temperature-critical applications within the standard voltage envelope.

Frequently Asked Questions (FAQ)

Q: Can 93LC56A/SN replace 93LC56AT/SN in production assembly?

A: Yes. Both parts are electrically and mechanically equivalent with identical memory specifications, interface protocol, clock frequency, and 8-SOIC package dimensions. The difference is packaging format (Tube versus Tape & Reel). Compatibility depends on assembly equipment capability to process the selected packaging format.

Q: What is the functional difference between 93LC56AT/SN and 93AA56AT-I/SN?

A: Both parts provide 2Kbit EEPROM with Microwire interface and identical memory organization. The 93AA56AT-I/SN extends the operating temperature range to -40°C ~ 85°C and reduces minimum supply voltage to 1.8V. The 93LC56AT/SN operates from 2.5V ~ 5.5V and 0°C ~ 70°C. Select 93AA56AT-I/SN for applications requiring lower voltage operation or wider temperature range.

Q: Are all substitutes pin-compatible with 93LC56AT/SN?

A: Yes. All substitute parts use the 8-SOIC package with identical 0.154" width and 3.90mm dimensions. Pin configuration and signal assignments are equivalent across all listed parts.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel, Tube, and Cut Tape formats contain identical die and electrical specifications. Packaging format selection is determined by assembly process requirements, not electrical performance.

Q: Are all parts RoHS3 compliant?

A: Yes. All listed parts maintain ROHS3 compliance with MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.

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