AT24C128C-SSPD-T Equivalent & Substitute Parts

Part Overview

The AT24C128C-SSPD-T is a 128Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface communication at 400 kHz with 900 ns access time. This component is classified as Active product status with AEC-Q100 automotive qualification and ROHS3 compliance. Substitute parts are identified when equivalent electrical parameters and mechanical compatibility are maintained across the same package footprint and functional interface, enabling direct replacement in applications requiring non-volatile memory storage.

Substiute Parts

AT24C128C-SSPD-T

Microchip TechnologyIn Stock: 1190AT24C128C-SSPD-T Datasheet

Current PartRFQ

24LC128T-E/SN

Microchip TechnologyIn Stock: 520824LC128T-E/SN Datasheet

Parametric EquivalentRFQ

CAV24C128WE-GT3

onsemiIn Stock: 1279CAV24C128WE-GT3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT24C128C-SSPD-T are qualified based on the following criteria:

Core Electrical Parameters (Must Match):

• Memory Size: 128Kbit
• Memory Organization: 16K x 8
• Memory Interface: I2C
• Voltage Supply Range: 2.5V ~ 5.5V
• Operating Temperature Range: -40°C ~ 125°C
• Package Type: 8-SOIC

Allowable Variations:

• Clock Frequency: Substitute parts may operate at equal or higher frequencies (400 kHz or greater)
• Access Time: Substitute parts may have equal or faster access times (900 ns or less)
• Write Cycle Time: Must remain at 5ms
• Packaging Format: May differ (Cut Tape, Tape & Reel) as long as component specifications remain identical
• Compliance Certifications: Product status and qualification levels are documented but do not restrict substitution eligibility

Parameter Comparison

Engineering Selection Recommendations

24LC128T-E/SN (Microchip Technology): This substitute maintains identical electrical and mechanical specifications to the AT24C128C-SSPD-T. Both components are manufactured by Microchip Technology, operate at 400 kHz clock frequency with 900 ns access time, and share the same 8-SOIC package footprint. Product status is Active for both parts. The primary difference is packaging format (Cut Tape & Digi-Reel versus standard packaging), which does not affect functional compatibility.

CAV24C128WE-GT3 (onsemi): This substitute provides enhanced performance characteristics with 1 MHz clock frequency and 400 ns access time, both superior to the main part specifications. The component maintains identical memory capacity, organization, voltage supply range, and operating temperature range. Both the main part and this substitute carry AEC-Q100 automotive qualification. The CAV24C128WE-GT3 features MSL 1 (Unlimited) moisture sensitivity versus MSL 3 (168 Hours) for the main part, indicating improved moisture resistance. All core electrical parameters and package specifications remain compatible.

Frequently Asked Questions (FAQ)

Q: Can the 24LC128T-E/SN be used as a direct replacement for the AT24C128C-SSPD-T?

A: Yes. Both components are 128Kbit I2C EEPROM devices with identical memory organization (16K x 8), clock frequency (400 kHz), access time (900 ns), voltage supply range (2.5V ~ 5.5V), operating temperature range (-40°C ~ 125°C), and 8-SOIC package footprint. The difference in packaging format (Cut Tape & Digi-Reel) does not affect electrical or mechanical compatibility.

Q: What are the performance differences between the AT24C128C-SSPD-T and CAV24C128WE-GT3?

A: The CAV24C128WE-GT3 operates at 1 MHz clock frequency compared to 400 kHz for the AT24C128C-SSPD-T, and provides 400 ns access time versus 900 ns. Both components maintain the same 128Kbit memory capacity, 16K x 8 organization, I2C interface, voltage supply range, and operating temperature range. The faster performance of the CAV24C128WE-GT3 makes it suitable for applications requiring higher data throughput.

Q: Are there any compliance or qualification differences between these substitute parts?

A: Both the AT24C128C-SSPD-T and CAV24C128WE-GT3 carry AEC-Q100 automotive qualification. All three parts (main and both substitutes) are ROHS3 compliant and REACH unaffected. The CAV24C128WE-GT3 has MSL 1 (Unlimited) moisture sensitivity compared to MSL 3 (168 Hours) for the other parts, indicating superior moisture resistance.

Q: Will the substitute parts work in the same PCB layout without modification?

A: Yes. All three parts use the identical 8-SOIC (0.154", 3.90mm Width) package with surface mount configuration. No PCB layout modifications are required for substitution.

Q: Can I use the CAV24C128WE-GT3 in an application designed for the AT24C128C-SSPD-T?

A: Yes. The CAV24C128WE-GT3 meets or exceeds all electrical specifications of the AT24C128C-SSPD-T. The higher clock frequency (1 MHz versus 400 kHz) and faster access time (400 ns versus 900 ns) are backward compatible with applications designed for the slower specifications. Both components maintain identical voltage supply range, operating temperature range, and package footprint.