AT24CS04-MAHM-E Equivalent & Substitute Parts

Part Overview

The AT24CS04-MAHM-E is a 4Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz with 550 ns access time. The device is supplied in 8-UDFN (2x3) surface mount packaging with exposed pad and operates across a wide voltage range of 1.7V to 5.5V. This part is Active status and ROHS3 compliant.

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when alternative packaging formats better suit manufacturing requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

AT24CS04-MAHM-E

Microchip TechnologyIn Stock: 1036AT24CS04-MAHM-E Datasheet

Current PartRFQ

AT24C04C-MAHM-T

Microchip TechnologyIn Stock: 6050AT24C04C-MAHM-T Datasheet

Parametric EquivalentRFQ

AT24CS04-MAHM-T

Microchip TechnologyIn Stock: 6202AT24CS04-MAHM-T Datasheet

Parametric EquivalentRFQ

BR24G04NUX-3TTR

Rohm SemiconductorIn Stock: 15352BR24G04NUX-3TTR Datasheet

MFR RecommendedRFQ

BR24T04NUX-WTR

Rohm SemiconductorIn Stock: 4839BR24T04NUX-WTR Datasheet

MFR RecommendedRFQ

CAT24C04HU4I-GT3

onsemiIn Stock: 18772CAT24C04HU4I-GT3 Datasheet

MFR RecommendedRFQ

M24C04-FMC6TG

STMicroelectronicsIn Stock: 2352M24C04-FMC6TG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following critical parameters:

• Memory capacity: 4Kbit
• Memory organization: 512 x 8 configuration
• Interface protocol: I2C
• Package format: 8-UDFN Exposed Pad (mechanical compatibility)
• Voltage supply range: Minimum 1.7V, maximum 5.5V
• Operating temperature range: -40°C to 85°C
• RoHS compliance: ROHS3 Compliant

Substitute parts are grouped into two categories based on clock frequency specification:

Category 1 - Microchip Technology (1 MHz Operation): AT24CS04-MAHM-T and AT24C04C-MAHM-T maintain identical electrical specifications including 1 MHz clock frequency and 550 ns access time. Differences exist only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel).

Category 2 - Cross-Manufacturer Alternatives (400 kHz Operation): BR24G04NUX-3TTR, BR24T04NUX-WTR, CAT24C04HU4I-GT3, and M24C04-FMC6TG operate at reduced clock frequency of 400 kHz with extended access times (900 ns). These parts maintain full electrical compatibility within the specified voltage and temperature ranges while offering alternative sourcing from Rohm Semiconductor, onsemi, and STMicroelectronics.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Performance): AT24CS04-MAHM-T and AT24C04C-MAHM-T are direct electrical equivalents to AT24CS04-MAHM-E. Both maintain 1 MHz clock frequency and 550 ns access time. Selection between these options depends on packaging format requirements: AT24CS04-MAHM-T uses Tape & Reel format matching the primary part, while AT24C04C-MAHM-T uses Cut Tape & Digi-Reel format. Both are Active status and ROHS3 compliant.

Cross-Manufacturer Alternatives (Reduced Clock Frequency): BR24G04NUX-3TTR, BR24T04NUX-WTR, CAT24C04HU4I-GT3, and M24C04-FMC6TG operate at 400 kHz instead of 1 MHz. These parts are suitable for applications where reduced clock frequency does not impact system performance. All alternatives maintain ROHS3 compliance and operate within the specified voltage and temperature ranges. CAT24C04HU4I-GT3 and M24C04-FMC6TG specify 900 ns access time compared to the primary part's 550 ns, which may affect timing-critical applications.

Moisture Sensitivity Consideration: The primary part AT24CS04-MAHM-E carries MSL rating 3 (168 hours). All substitute parts except AT24CS04-MAHM-T and AT24C04C-MAHM-T carry MSL rating 1 (Unlimited), indicating superior moisture resistance and reduced baking requirements during assembly.

Frequently Asked Questions (FAQ)

Q: Can AT24C04C-MAHM-T replace AT24CS04-MAHM-E in production? A: Yes. Both parts are electrically identical with 4Kbit capacity, I2C interface, 1 MHz operation, and 550 ns access time. The difference is packaging format: AT24C04C-MAHM-T uses Cut Tape & Digi-Reel instead of Tape & Reel. Verify your assembly equipment compatibility with the packaging format before implementation.

Q: What is the impact of using 400 kHz parts instead of 1 MHz? A: The 400 kHz alternatives (Rohm and onsemi/STMicroelectronics parts) operate at reduced clock frequency. This affects maximum I2C bus speed capability. Use these parts only if your application does not require 1 MHz I2C operation. All other electrical parameters remain compatible.

Q: Are the Rohm Semiconductor BR24G04NUX-3TTR and BR24T04NUX-WTR interchangeable? A: Both Rohm parts are electrically identical 4Kbit I2C EEPROMs with 400 kHz operation. Differences exist only in internal part designation. Consult Rohm documentation for specific application guidance, as both carry identical electrical specifications.

Q: Does MSL rating affect part selection? A: MSL rating indicates moisture sensitivity during storage and assembly. The primary part (MSL 3) requires baking before reflow if exposed to moisture for more than 168 hours. Substitute parts with MSL 1 (Unlimited) do not require baking. For high-volume production with extended storage, MSL 1 parts reduce assembly process complexity.

Q: Can I mix substitute parts from different manufacturers in the same production run? A: Yes, provided your application tolerates the reduced 400 kHz clock frequency of cross-manufacturer alternatives. All substitute parts meet the same voltage, temperature, and RoHS compliance requirements. Verify I2C bus timing requirements before mixing parts with different clock frequencies in the same system.

Q: What is the voltage supply difference between Microchip and Rohm parts? A: Microchip AT24CS04 and onsemi CAT24C04 support 1.7V minimum supply voltage. Rohm BR24G04 and BR24T04 support 1.6V minimum. Both ranges are compatible with standard 3.3V and 5V systems. For applications operating below 1.7V, Rohm parts provide extended lower voltage capability.