AT25640B-MAHL-E Equivalent & Substitute Parts

Part Overview

The AT25640B-MAHL-E is a 64Kbit EEPROM memory IC manufactured by Microchip Technology, designed for SPI serial interface applications operating at 20 MHz. This non-volatile memory device is packaged in an 8-UFDFN surface mount configuration with exposed pad and is currently in active production status. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility requirements are met, enabling design flexibility and supply chain optimization.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	64Kbit
Memory Organization	8K x 8
Memory Interface	SPI
Clock Frequency	20 MHz
Write Cycle Time	5ms
Supply Voltage Range	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-UFDFN Exposed Pad (2x3)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the AT25640B-MAHL-E are qualified based on the following critical parameters:

Memory capacity: 64Kbit
Memory organization: 8K x 8 configuration
Interface protocol: SPI serial interface
Operating frequency: 20 MHz
Supply voltage compatibility: Minimum 1.8V operation required
Package footprint: 8-UFDFN (2x3) with exposed pad
Temperature range: -40°C to 85°C
Non-volatile EEPROM technology

The identified substitutes maintain electrical equivalence across these parameters, ensuring pin-compatible operation and functional interchangeability in target applications.

Parameter Comparison

Parameter	AT25640B-MAHL-E (Microchip)	M95640-DFMC6TG (STMicroelectronics)	M95640-RMC6TG (STMicroelectronics)
Memory Size	64Kbit	64Kbit	64Kbit
Memory Organization	8K x 8	8K x 8	8K x 8
Memory Interface	SPI	SPI	SPI
Clock Frequency	20 MHz	20 MHz	20 MHz
Write Cycle Time	5ms	5ms	5ms
Supply Voltage Range	1.8V ~ 5.5V	1.7V ~ 5.5V	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-UFDFN Exposed Pad	8-UFDFN Exposed Pad	8-UFDFN Exposed Pad
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99	EAR99

Engineering Selection Recommendations

All three parts maintain active product status and full compliance with ROHS3 and REACH regulations. The AT25640B-MAHL-E and M95640-RMC6TG share identical supply voltage specifications (1.8V ~ 5.5V), while the M95640-DFMC6TG operates from 1.7V minimum, providing extended low-voltage capability. The M95640 series parts from STMicroelectronics feature improved moisture sensitivity levels (MSL 1, Unlimited) compared to the AT25640B-MAHL-E (MSL 3, 168 Hours), indicating superior moisture resistance for storage and handling. Packaging differences exist: M95640-DFMC6TG is supplied in Tape & Reel format, while M95640-RMC6TG is available in Cut Tape & Digi-Reel format. Selection should be based on supply chain requirements, packaging preferences, and moisture sensitivity constraints for the target application environment.

Frequently Asked Questions (FAQ)

Q: Are the M95640 series parts pin-compatible with the AT25640B-MAHL-E?

A: Yes. All three parts use the 8-UFDFN (2x3) package with exposed pad configuration, ensuring identical pinout and footprint compatibility for direct substitution on PCB layouts.

Q: What is the difference between M95640-DFMC6TG and M95640-RMC6TG?

A: Both parts are electrically identical with matching memory specifications and performance characteristics. The primary difference is packaging format: M95640-DFMC6TG is supplied in Tape & Reel (TR), while M95640-RMC6TG is supplied in Cut Tape (CT) & Digi-Reel format. Selection depends on assembly process requirements and inventory management preferences.

Q: Does the lower minimum supply voltage of M95640-DFMC6TG (1.7V) affect compatibility?

A: The M95640-DFMC6TG operates from 1.7V minimum, compared to 1.8V for the AT25640B-MAHL-E and M95640-RMC6TG. This extended range provides additional flexibility for low-power applications but does not affect compatibility in systems designed for 1.8V or higher operation.

Q: What is the significance of the MSL rating difference?

A: The AT25640B-MAHL-E has MSL 3 (168 Hours), while both M95640 variants have MSL 1 (Unlimited). MSL 1 indicates superior moisture resistance and longer shelf life without baking requirements, beneficial for extended storage or high-humidity environments.

Q: Can these parts be used interchangeably in production?

A: Yes, provided that supply voltage requirements and packaging formats align with assembly specifications. All parts meet identical electrical performance criteria, temperature ranges, and regulatory compliance standards for direct functional substitution.

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