AT24C32D-MAPD-E Equivalent & Substitute Parts

Part Overview

The AT24C32D-MAPD-E is a 32Kbit EEPROM memory IC manufactured by Microchip Technology, designed for I2C serial communication applications. This non-volatile memory device operates at 1 MHz clock frequency with 900 ns access time and supports a supply voltage range of 2.5V to 5.5V. The component is actively produced and carries AEC-Q100 automotive qualification, making it suitable for automotive-grade applications. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when inventory constraints require component alternatives that maintain functional and electrical compatibility.

Substiute Parts

AT24C32D-MAPD-E

Microchip TechnologyIn Stock: 1061AT24C32D-MAPD-E Datasheet

Current PartRFQ

M24C32-FMC6TG

STMicroelectronicsIn Stock: 18364M24C32-FMC6TG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT24C32D-MAPD-E is determined by the following critical parameters:

• Memory capacity and organization (32Kbit, 4K x 8 configuration)
• I2C serial interface protocol
• Clock frequency (1 MHz operation)
• Package form factor (8-UFDFN with exposed pad)
• Supply voltage compatibility (minimum 2.5V support required)
• Write cycle time (5ms specification)
• RoHS3 compliance status

The M24C32-FMC6TG from STMicroelectronics meets all substitution criteria. Both devices share identical memory capacity, organization, I2C interface, clock frequency, write cycle time, and package configuration. The substitute part supports an extended lower voltage range (1.7V minimum) and maintains RoHS3 compliance, enabling direct functional replacement in I2C EEPROM applications.

Parameter Comparison

Engineering Selection Recommendations

Both the AT24C32D-MAPD-E and M24C32-FMC6TG are active production components with ROHS3 compliance. The AT24C32D-MAPD-E carries AEC-Q100 automotive qualification, designating it for automotive-grade applications requiring formal qualification documentation. The M24C32-FMC6TG provides equivalent functional performance with improved access time (450 ns versus 900 ns) and extended lower voltage operation (1.7V minimum). Selection between these parts should be based on application-specific requirements: choose the AT24C32D-MAPD-E when automotive qualification is mandatory; select the M24C32-FMC6TG when lower voltage operation or faster access time is beneficial and automotive qualification is not required.

Frequently Asked Questions (FAQ)

Q: Can the M24C32-FMC6TG directly replace the AT24C32D-MAPD-E in existing designs?

A: Yes. Both devices share identical memory capacity (32Kbit), organization (4K x 8), I2C interface, clock frequency (1 MHz), write cycle time (5ms), and package configuration (8-UFDFN). The substitute part is functionally compatible for I2C EEPROM applications. Verify that your application does not require AEC-Q100 automotive qualification before substitution.

Q: What is the difference in access time between these parts?

A: The AT24C32D-MAPD-E specifies 900 ns access time, while the M24C32-FMC6TG specifies 450 ns access time. The substitute part offers faster data access. This difference does not affect compatibility in standard I2C applications where access time margins are adequate.

Q: Are there voltage supply differences I should consider?

A: The AT24C32D-MAPD-E operates from 2.5V to 5.5V. The M24C32-FMC6TG extends the lower limit to 1.7V while maintaining the 5.5V upper limit. If your application requires operation below 2.5V, the M24C32-FMC6TG is the appropriate choice.

Q: Does the operating temperature range affect substitution?

A: The AT24C32D-MAPD-E operates from -40°C to 125°C, while the M24C32-FMC6TG operates from -40°C to 85°C. If your application requires operation above 85°C, the AT24C32D-MAPD-E is required. For applications within the -40°C to 85°C range, both parts are compatible.

Q: Is the 8-UFDFN package identical between both parts?

A: Yes. Both the AT24C32D-MAPD-E and M24C32-FMC6TG use the 8-UFDFN (2x3) package with exposed pad. PCB layout and footprint are identical, enabling direct physical substitution.

Q: What is the significance of AEC-Q100 qualification?

A: AEC-Q100 is an automotive industry qualification standard. The AT24C32D-MAPD-E carries this qualification, making it suitable for automotive applications requiring formal qualification documentation. The M24C32-FMC6TG does not carry this designation. Use the AT24C32D-MAPD-E for automotive applications where qualification is mandatory.