AT24C64D-XPD-T EEPROM 64Kbit I2C Equivalent & Substitute Parts

Part Overview

The AT24C64D-XPD-T is a 64Kbit non-volatile EEPROM memory IC manufactured by Microchip Technology, designed for I2C serial communication applications. This device operates at 400 kHz clock frequency with 900 ns access time and supports a supply voltage range of 2.5V to 5.5V across an extended operating temperature range of -40°C to 125°C. The part is AEC-Q100 qualified for automotive applications and is currently in active production status. Equivalent and substitute parts are identified based on matching core electrical and mechanical parameters that ensure functional compatibility in system designs.

Key Parameters

Parameter	Value
Memory Size	64Kbit
Memory Organization	8K x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
Package Type	8-TSSOP
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the AT24C64D-XPD-T are qualified based on the following core parameters that determine functional interchangeability:

Memory capacity: 64Kbit
Memory organization: 8K x 8 byte structure
Interface protocol: I2C serial communication
Clock frequency: 400 kHz operation
Access time: 900 ns maximum
Write cycle time: 5ms per page
Supply voltage compatibility: 2.5V to 5.5V range
Package form factor: 8-TSSOP surface mount
RoHS compliance: ROHS3 standard

Substitutes are grouped into parametric equivalents and manufacturer-recommended alternatives. Parametric equivalents match all critical electrical and mechanical specifications. Manufacturer-recommended alternatives may have extended voltage ranges or different temperature qualifications but maintain core functional compatibility.

Parameter Comparison

Parameter	AT24C64D-XPD-T	24LC64T-E/ST	BR24T64FVT-WE2	CAV24C64YE-GT3
Manufacturer	Microchip Technology	Microchip Technology	Rohm Semiconductor	onsemi
Memory Size	64Kbit	64Kbit	64Kbit	64Kbit
Memory Organization	8K x 8	8K x 8	8K x 8	8K x 8
Memory Interface	I2C	I2C	I2C	I2C
Clock Frequency	400 kHz	400 kHz	400 kHz	400 kHz
Access Time	900 ns	900 ns	Not specified	900 ns
Write Cycle Time	5ms	5ms	5ms	5ms
Voltage Supply Range	2.5V ~ 5.5V	2.5V ~ 5.5V	1.6V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 125°C
Package Type	8-TSSOP	8-TSSOP	8-TSSOP	8-TSSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
AEC-Q100 Qualified	Yes	No	No	Yes

Engineering Selection Recommendations

24LC64T-E/ST (Microchip Technology): This parametric equivalent matches all electrical and mechanical specifications of the AT24C64D-XPD-T. Both devices share identical memory capacity, interface protocol, clock frequency, access time, voltage range, and operating temperature range. The primary difference is packaging format (Cut Tape & Digi-Reel versus standard packaging). This part is verified for DiGi-Electronics programmability and maintains ROHS3 compliance. Selection is appropriate for applications where AEC-Q100 qualification is not required.

BR24T64FVT-WE2 (Rohm Semiconductor): This manufacturer-recommended alternative provides extended voltage supply range (1.6V to 5.5V) compared to the main part. However, the operating temperature range is limited to -40°C to 85°C, which is narrower than the AT24C64D-XPD-T specification. This part is suitable for applications operating within the reduced temperature range where the extended low-voltage capability provides system design flexibility. AEC-Q100 qualification is not provided.

CAV24C64YE-GT3 (onsemi): This parametric equivalent matches all critical specifications of the AT24C64D-XPD-T, including memory capacity, interface, clock frequency, access time, voltage range, and operating temperature range. Both devices carry AEC-Q100 automotive qualification, making this part directly suitable for automotive applications requiring equivalent qualification status. Packaging is provided in Tape & Reel format.

Frequently Asked Questions (FAQ)

Q: Can I substitute the AT24C64D-XPD-T with any of these parts without design changes?

A: The 24LC64T-E/ST and CAV24C64YE-GT3 are direct parametric equivalents and can be substituted without design modifications. The BR24T64FVT-WE2 requires verification that your application operates within its -40°C to 85°C temperature range. All three parts share the same 8-TSSOP package footprint and I2C interface protocol.

Q: What is the difference between parametric equivalents and manufacturer-recommended alternatives?

A: Parametric equivalents match all specified electrical and mechanical parameters of the main part. Manufacturer-recommended alternatives may have extended or different specifications (such as voltage range or temperature range) but maintain core functional compatibility for I2C EEPROM applications.

Q: Does the BR24T64FVT-WE2 work in automotive applications?

A: The BR24T64FVT-WE2 does not carry AEC-Q100 qualification. If your application requires automotive-grade components, select either the AT24C64D-XPD-T or CAV24C64YE-GT3, both of which are AEC-Q100 qualified.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts (24LC64T-E/ST, BR24T64FVT-WE2, and CAV24C64YE-GT3) are ROHS3 compliant, matching the compliance status of the AT24C64D-XPD-T.

Q: What is the significance of the 8-TSSOP package specification?

A: The 8-TSSOP package is a surface-mount form factor with 0.173" width and 4.40mm overall width. All listed substitute parts use this identical package type, ensuring PCB footprint compatibility and eliminating the need for layout redesign.

Q: Can I use the BR24T64FVT-WE2 in a system designed for 2.5V to 5.5V operation?

A: Yes. The BR24T64FVT-WE2 supports the 2.5V to 5.5V range and extends this capability down to 1.6V. However, verify that your application does not require operation above 85°C, as this part is limited to -40°C to 85°C.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message