25AA160D-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 25AA160D-E/ST is a 16Kbit Serial Peripheral Interface (SPI) EEPROM memory IC manufactured by Microchip Technology in an 8-TSSOP surface mount package. This non-volatile memory device operates across a wide supply voltage range of 1.8V to 5.5V and supports industrial temperature ranges from -40°C to 125°C. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package type, and electrical operating parameters to ensure functional interchangeability in circuit designs.

Key Parameters

Parameter	Value
Memory Size	16Kbit
Memory Organization	2K x 8
Memory Interface	SPI
Clock Frequency	10 MHz
Write Cycle Time	5ms
Voltage Supply Range	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
Package Type	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 25AA160D-E/ST are qualified based on the following critical parameters:

Memory Capacity & Organization: All substitutes must provide 16Kbit capacity in 2K x 8 organization to maintain data storage equivalence
Interface Protocol: SPI interface is mandatory for direct pin-level compatibility
Package & Pinout: 8-TSSOP package with identical physical dimensions (0.173", 4.40mm Width) ensures PCB layout compatibility
Supply Voltage Range: Minimum 1.8V support required; substitutes with wider ranges (down to 1.6V or 1.7V) provide enhanced flexibility
Operating Temperature: Minimum -40°C to 85°C required; parts rated to 105°C or 125°C offer extended thermal margin
Write Cycle Time: 5ms or faster acceptable; 4ms variants provide performance improvement
Clock Frequency: 10 MHz or higher acceptable; 20 MHz variants provide performance headroom
Compliance & Certifications: RoHS3 compliance and MSL 1 rating maintained across all substitutes

Parameter Comparison

Manufacturer Part Number	Manufacturer	Memory Size	Clock Frequency	Write Cycle Time	Voltage Supply	Operating Temperature	Package	Automotive Grade
25AA160D-E/ST	Microchip Technology	16Kbit	10 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	No
CAT25160YI-GT3	onsemi	16Kbit	20 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No
CAV25160YE-GT3	onsemi	16Kbit	20 MHz	5ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Yes (AEC-Q100)
M95160-DFDW6TP	STMicroelectronics	16Kbit	20 MHz	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No
M95160-DRDW8TP/K	STMicroelectronics	16Kbit	20 MHz	4ms	1.8V ~ 5.5V	-40°C ~ 105°C	8-TSSOP	Yes (AEC-Q100)
M95160-RDW6TP	STMicroelectronics	16Kbit	10 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No
S-25C160A0I-T8T1U3	ABLIC Inc.	16Kbit	5 MHz	5ms	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No

Engineering Selection Recommendations

Direct Functional Equivalent (Identical Performance Profile)

M95160-RDW6TP from STMicroelectronics provides the closest functional match to the 25AA160D-E/ST, maintaining identical clock frequency (10 MHz), write cycle time (5ms), and supply voltage range (1.8V ~ 5.5V). This part is suitable for direct substitution in applications where the original operating temperature range of -40°C to 125°C is not critical and -40°C to 85°C is acceptable.

Enhanced Performance Substitutes (Higher Clock Frequency)

CAT25160YI-GT3 (onsemi) and M95160-DFDW6TP (STMicroelectronics) both offer doubled clock frequency (20 MHz) while maintaining 5ms write cycle time and 1.8V ~ 5.5V supply compatibility. These parts provide performance headroom for timing-sensitive applications. Operating temperature is limited to -40°C to 85°C.

Automotive-Qualified Alternatives

CAV25160YE-GT3 (onsemi) and M95160-DRDW8TP/K (STMicroelectronics) carry AEC-Q100 automotive qualification. CAV25160YE-GT3 maintains the full -40°C to 125°C temperature range of the original part while offering 20 MHz clock frequency, though supply voltage is limited to 2.5V minimum. M95160-DRDW8TP/K provides the fastest write cycle time (4ms) and extended temperature rating to 105°C with AEC-Q100 qualification.

Low-Frequency Alternative

S-25C160A0I-T8T1U3 (ABLIC Inc.) operates at 5 MHz clock frequency with the widest supply voltage range (1.6V ~ 5.5V), making it suitable for ultra-low-power or battery-powered applications where reduced clock speed is acceptable.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 25AA160D-E/ST with any of these parts without PCB modifications?

A: Yes. All listed substitutes use the identical 8-TSSOP package with matching pinout and physical dimensions. No PCB layout changes are required. However, verify that your application's operating temperature and supply voltage requirements align with the substitute part's specifications.

Q: What is the key difference between M95160-RDW6TP and M95160-DFDW6TP?

A: Both are STMicroelectronics M95160 variants in 8-TSSOP packages. M95160-RDW6TP operates at 10 MHz (matching the original 25AA160D-E/ST) with -40°C to 85°C temperature range. M95160-DFDW6TP operates at 20 MHz with the same temperature range. Choose M95160-RDW6TP for direct performance matching or M95160-DFDW6TP if higher clock frequency is beneficial.

Q: Why does CAV25160YE-GT3 have a minimum supply voltage of 2.5V instead of 1.8V?

A: CAV25160YE-GT3 is automotive-qualified (AEC-Q100) and designed for automotive applications where 2.5V minimum is standard. If your circuit requires operation below 2.5V, select a non-automotive variant such as CAT25160YI-GT3 or M95160-DFDW6TP.

Q: Is the S-25C160A0I-T8T1U3 suitable as a direct replacement?

A: S-25C160A0I-T8T1U3 provides functional equivalence in memory capacity, organization, and package. However, its 5 MHz clock frequency is half that of the original 25AA160D-E/ST. Use this part only if your application does not require the higher clock speed and benefits from the extended 1.6V minimum supply voltage.

Q: What does AEC-Q100 qualification mean for automotive applications?

A: AEC-Q100 is an automotive electronics quality standard. Parts carrying this qualification (CAV25160YE-GT3 and M95160-DRDW8TP/K) have undergone rigorous testing for reliability in automotive environments. Use these parts for automotive applications; standard industrial parts are not recommended for automotive use.

Q: Can I use a substitute with a higher operating temperature rating in a standard industrial application?

A: Yes. A part rated for a wider or higher temperature range is fully compatible with applications requiring a narrower range. For example, the 25AA160D-E/ST rated to 125°C can be replaced with any substitute rated to 85°C or higher without thermal concerns in standard industrial environments.

Q: What is the difference between packaging types (Tube, Tape & Reel, Cut Tape)?

A: Packaging affects order quantity and handling but not electrical performance. Tube packaging is typically for smaller quantities. Tape & Reel (TR) and Cut Tape (CT) are for automated assembly. All substitutes are electrically identical regardless of packaging format.

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