onsemi CM1624-08DE

Overview

CM1624-08DE from onsemi is an EMI filter and line-termination device with integrated TVS diode protection, designed for T-Flash, MicroSD, MMC, and portable memory-card interface applications. The device integrates series impedance-matching resistors, pull-up resistors, and ESD protection diodes to simplify signal-line protection and filtering in compact consumer and embedded electronics.

As part of the onsemi interface protection portfolio, CM1624-08DE combines bidirectional EMI/RFI filtering, line termination, and IEC 61000-4-2 ESD protection in a compact 16-pin UDFN package. For engineers reviewing the CM1624-08DE datasheet, CM1624-08DE pinout, CM1624-08DE application, or CM1624-08DE equivalent, this device is widely used in MicroSD card sockets, T-Flash interfaces, MMC connections, mobile phones, handheld devices, and portable embedded systems.

Technical Context

In portable electronic systems, CM1624-08DE operates as a combined interface filter and protection device placed between the host controller and the external memory-card connector. It protects data, command, clock, and VCC lines while also providing line termination and pull-up functionality required by SD and SPI interface configurations.

The device includes six protected signal paths with 40Ω termination resistors on SDData0, SDData1, SDData2, SDData3, CMD, and CLK lines. Pull-up resistors of 25kΩ are integrated on SDData0, SDData1, SDData2, SDData3, and CMD lines, reducing the number of external discrete resistors required around the memory-card interface.

CM1624-08DE is commonly used in smartphones, portable media players, handheld electronics, industrial handheld terminals, embedded MicroSD sockets, and compact digital systems requiring EMI suppression, line matching, and ESD protection in a single package.

Key Specifications

Pinout & Package

The CM1624-08DE pinout is optimized for compact MicroSD and T-Flash interface routing. Signal-line pairs are arranged to support protected routing between the host side and the memory-card connector side, while the exposed ground pad provides the return path for ESD discharge current and shielding.

For PCB implementation, the device should be placed close to the card connector to intercept ESD events before they reach the controller. Short data-line routing, solid ground-pad connection, low-inductance ESD return paths, and controlled signal routing help maintain EMI suppression and interface reliability.

Key Features

• Combines EMI/RFI filtering, line termination, and ESD protection in one device.
• Optimized for T-Flash, MicroSD, and MMC interface protection.
• Integrated 40Ω termination resistors reduce external component count.
• Integrated 25kΩ pull-up resistors support SD and SPI mode configurations.
• Provides ±15kV IEC 61000-4-2 ESD protection for portable interfaces.
• Protects six signal lines plus the VCC bus in compact card-interface designs.
• 16-pin UDFN package supports space-constrained portable electronics.

Applications

Equivalent & Alternatives

When evaluating CM1624-08DE equivalent devices, engineers should compare the number of protected lines, integrated termination values, pull-up resistor availability, capacitance per channel, ESD rating, package size, and MicroSD interface compatibility.

Compared with EMIF06-MSD02N16, CM1624-08DE is optimized for MicroSD and T-Flash designs requiring integrated termination resistors, pull-up resistors, and VCC-bus ESD protection in one device. CM1624-08DE vs TPD6F002 selection depends on resistor network requirements, capacitance limits, PCB footprint, ESD rating, and card-interface signal architecture.

Quality

CM1624-08DE should be sourced as original onsemi components through traceable and controlled supply channels. Quality verification procedures may include package inspection, top-mark validation, solderability testing, continuity verification, ESD-protection function checks, leakage-current testing, and incoming inspection according to portable electronic-system production requirements.

Because the device protects external card interfaces, connector-side placement, low-impedance ground-pad connection, controlled signal routing, and proper ESD discharge path design help maintain interface protection and long-term system reliability. Traceable sourcing supports manufacturing quality and reduces counterfeit supply-chain risk.

Availability

CM1624-08DE available at Aetrix Electronics and suitable for MicroSD interfaces, T-Flash connectors, MMC interfaces, mobile electronics, handheld devices, and embedded storage platforms requiring stable component supply and repeatable production support.

Supply support may include scheduled delivery planning, volume procurement support, BOM continuity assistance, traceable sourcing management, and long-term availability support for OEM manufacturers, portable-device developers, embedded-system designers, and electronics production programs.

For production deployment, confirming package type, protected-line count, ESD rating, signal-capacitance requirements, termination-resistor configuration, and sourcing continuity helps reduce procurement risk and improve manufacturing stability.

Manufacturer

onsemi is a semiconductor manufacturer specializing in power management, protection devices, analog ICs, discretes, sensors, interface products, and intelligent power technologies for automotive, industrial, communication, consumer, and computing applications.

The onsemi interface protection portfolio focuses on ESD suppression, EMI filtering, signal-line termination, low-capacitance protection, and compact package integration for portable electronics, embedded interfaces, communication systems, and high-density digital designs.

FAQ

What is CM1624-08DE used for?

CM1624-08DE is used for EMI filtering, line termination, pull-up support, and ESD protection in T-Flash, MicroSD, MMC, and portable memory-card interface applications.

Where can I find the CM1624-08DE datasheet download?

The CM1624-08DE datasheet is available from onsemi and includes electrical specifications, pin descriptions, filter performance information, ESD ratings, package dimensions, and application details.

What should be considered in CM1624-08DE PCB design?

PCB implementation should prioritize connector-side placement, short protected-line routing, solid ground-pad connection, low-inductance ESD return paths, and controlled routing for MicroSD signal integrity.

Does CM1624-08DE include pull-up resistors?

Yes. CM1624-08DE integrates 25kΩ pull-up resistors on the SDData0, SDData1, SDData2, SDData3, and CMD lines.

What are common CM1624-08DE equivalent solutions?

Common equivalent alternatives include EMIF06-MSD02N16 and TPD6F002 depending on protected-line count, capacitance requirements, resistor-network configuration, package constraints, and MicroSD interface design objectives.