25LC160DT-I/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 25LC160DT-I/ST is a 16Kbit Serial Peripheral Interface (SPI) EEPROM memory integrated circuit manufactured by Microchip Technology. This non-volatile memory device operates at 10 MHz clock frequency with a 2K x 8 memory organization, housed in an 8-TSSOP surface mount package. The part is currently active in production and ROHS3 compliant.

Substitute parts are necessary when the original part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when enhanced performance specifications (such as higher clock frequency or extended temperature range) are needed for specific applications.

Key Parameters

Parameter	Value
Memory Size	16Kbit
Memory Organization	2K x 8
Memory Interface	SPI
Clock Frequency	10 MHz
Write Cycle Time	5ms
Supply Voltage Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 25LC160DT-I/ST is determined by the following critical parameters:

Primary Compatibility Criteria:

Memory Size: 16Kbit (fixed requirement)
Memory Organization: 2K x 8 (fixed requirement)
Memory Interface: SPI (fixed requirement)
Package Type: 8-TSSOP (fixed requirement)
Mounting Type: Surface Mount (fixed requirement)

Secondary Compatibility Criteria (with allowable variations):

Clock Frequency: 10 MHz minimum (higher frequencies are compatible)
Supply Voltage Range: Must encompass 2.5V ~ 5.5V or be a subset within this range
Operating Temperature: Must support -40°C minimum and 85°C maximum or extended ranges
Write Cycle Time: 5ms or faster

Substitute parts are grouped into three categories based on these parameters:

Category 1 - Direct Electrical Equivalents (Same Clock Frequency): Parts with 10 MHz clock frequency and identical electrical specifications.

Category 2 - Enhanced Performance Substitutes (Higher Clock Frequency): Parts with 20 MHz clock frequency, providing faster operation while maintaining backward compatibility.

Category 3 - Automotive Grade Substitutes: Parts with AEC-Q100 qualification and extended temperature ranges, suitable for automotive applications.

Parameter Comparison

Part Number	Manufacturer	Clock Frequency (MHz)	Supply Voltage (V)	Operating Temp (°C)	Write Cycle (ms)	Packaging	Product Status	AEC-Q100
25LC160DT-I/ST	Microchip	10	2.5 ~ 5.5	-40 ~ 85	5	Tape & Reel	Active	No
25LC160D-I/ST	Microchip	10	2.5 ~ 5.5	-40 ~ 85	5	Tube	Active	No
25LC160AT-E/ST	Microchip	10	2.5 ~ 5.5	-40 ~ 125	5	Cut Tape	Active	No
AT25160B-XHL-T	Microchip	20	1.8 ~ 5.5	-40 ~ 85	5	Cut Tape & Digi-Reel	Active	No
BR25H160FVT-2CE2	Rohm Semiconductor	10	2.5 ~ 5.5	-40 ~ 125	4	Tape & Reel	Active	Yes
CAT25160YI-G	onsemi	20	1.8 ~ 5.5	-40 ~ 85	5	Not Specified	Obsolete	No
CAT25160YI-GT3	onsemi	20	1.8 ~ 5.5	-40 ~ 85	5	Tape & Reel	Active	No
CAV25160YE-GT3	onsemi	20	2.5 ~ 5.5	-40 ~ 125	5	Tape & Reel	Active	Yes
M95160-DFDW6TP	STMicroelectronics	20	1.7 ~ 5.5	-40 ~ 85	5	Tape & Reel	Active	No
M95160-DRDW3TP/K	STMicroelectronics	20	1.8 ~ 5.5	-40 ~ 125	4	Cut Tape & Digi-Reel	Active	Yes
M95160-DRDW8TP/K	STMicroelectronics	20	1.8 ~ 5.5	-40 ~ 105	4	Tape & Reel	Active	Yes

Engineering Selection Recommendations

For Direct Replacement (Same Specifications):

The 25LC160D-I/ST serves as a direct electrical equivalent with identical performance characteristics. The primary difference is packaging format (Tube versus Tape & Reel). Selection between these parts depends on manufacturing process requirements and inventory management practices.

For Extended Temperature Range Applications:

The 25LC160AT-E/ST extends the operating temperature range to -40°C ~ 125°C while maintaining 10 MHz clock frequency. This part is suitable for applications requiring enhanced thermal performance without increased clock speed.

For Higher Clock Frequency Requirements:

Parts operating at 20 MHz (AT25160B-XHL-T, CAT25160YI-GT3, M95160-DFDW6TP, M95160-DRDW3TP/K, M95160-DRDW8TP/K) provide faster SPI communication while maintaining full backward compatibility with 10 MHz designs. These parts are electrically interchangeable in applications where higher speed is beneficial.

For Automotive Applications:

Parts with AEC-Q100 qualification (BR25H160FVT-2CE2, CAV25160YE-GT3, M95160-DRDW3TP/K, M95160-DRDW8TP/K) meet automotive industry reliability standards. BR25H160FVT-2CE2 maintains 10 MHz operation with extended temperature range. CAV25160YE-GT3 and M95160 series provide 20 MHz operation with automotive qualification.

For Low Voltage Applications:

Parts with supply voltage range extending to 1.7V or 1.8V (AT25160B-XHL-T, CAT25160YI-GT3, M95160-DFDW6TP, M95160-DRDW3TP/K, M95160-DRDW8TP/K) are suitable for battery-powered or low-power applications.

Parts to Avoid:

CAT25160YI-G is marked as Obsolete and should not be selected for new designs.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 25LC160DT-I/ST with a 20 MHz part like the M95160-DRDW3TP/K?

A: Yes. The 20 MHz parts are electrically compatible substitutes. The higher clock frequency is backward compatible with 10 MHz designs. The SPI interface, memory size, organization, and package remain identical. The system will operate correctly at either 10 MHz or 20 MHz depending on the host controller configuration.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel packaging is supplied on continuous tape wound on a reel, suitable for high-volume automated assembly. Cut Tape packaging is supplied in shorter tape segments, suitable for lower-volume production or manual assembly. Both formats contain identical components in the same 8-TSSOP package.

Q: Is the 25LC160AT-E/ST a suitable replacement for automotive applications?

A: The 25LC160AT-E/ST is not AEC-Q100 qualified. For automotive applications, select BR25H160FVT-2CE2, CAV25160YE-GT3, M95160-DRDW3TP/K, or M95160-DRDW8TP/K, which carry AEC-Q100 qualification.

Q: What does the extended temperature range (-40°C ~ 125°C) provide?

A: Extended temperature range ensures reliable operation in high-temperature environments such as automotive engine compartments or industrial equipment. Parts with standard range (-40°C ~ 85°C) are suitable for consumer electronics and standard industrial applications.

Q: Can I use AT25160B-XHL-T in a design originally specified for 25LC160DT-I/ST?

A: Yes. The AT25160B-XHL-T is a direct functional substitute with identical memory specifications and package. The 20 MHz clock frequency is faster than the original 10 MHz specification, providing enhanced performance. The lower minimum supply voltage (1.8V versus 2.5V) expands application flexibility.

Q: Why do some parts have faster write cycle times (4ms versus 5ms)?

A: Write cycle time is the duration required to complete a single page write operation. Faster write cycle times (4ms) indicate improved performance. Parts with 4ms write cycles (BR25H160FVT-2CE2, M95160-DRDW3TP/K, M95160-DRDW8TP/K) complete write operations more quickly than 5ms parts, reducing overall programming time in applications with frequent write operations.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed in this reference are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for electronic components.

Q: What is the significance of "DiGi-Electronics Programmable: Verified" on the 25LC160AT-E/ST?

A: This designation indicates that the part has been verified for programming compatibility with DiGi-Electronics equipment and processes. Parts without this verification may still be functionally compatible but have not undergone this specific validation.

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