New Semtech Devices Safeguard 3G/CDMA Phones from EMI/ESD
Semtech Corp. has announced the Eclamp™ 237xP family of devices designed to protect against the increased risk of electrostatic discharge (ESD) and increased levels of electromagnetic interference (EMI) and radio frequency interference (RFI) in 3G and CDMA phones that have high-resolution displays and video and digital camera features.
The EClamp237xP devices provide IEC-standard levels of ESD protection, low capacitance and resistance, and a package that consolidates more than 32 discrete components to help conserve board space in these space-constrained applications.
The new EClamp237xP family includes the four-line EClamp2374P, the six-line EClamp2376P and the eight-line EClamp2378P. The devices feature a TVS diode on each line for ESD protection and a resistor-capacitor network for EMI/RFI filtering. All models of the EClamp237xP family feature low series resistance of 100 ohms combined with a capacitance of 20pF to deliver more than 30dB of attenuation from 1.8GHz to 2.5GHz.
The devices in the EClamp237xP family all feature very low clamping voltage to protect the sensitive baseband controller. The devices are designed to protect and filter high-speed parallel interfaces that operate at speeds up to 60Mbs without signal degradation.
"The high bandwidth of today's LCD interfaces means that the nature of a protection device must change to provide high levels of protection without impacting the signal quality," said Tom Dugan, Semtech marketing manager for protection products. "We've cut the resistance and capacitance dramatically in the EClamp237xP family compared to the competition in this space without impacting the device's legacy of low clamping voltages and superior ESD protection."
The EClamp237xP devices are packaged in the Semtech Leadless Package (SLP) that has the narrow form factor and manufacturing durability to replace "flip chip" based alternatives. All devices in the family feature a uniform narrow 1.6 mm width, and a uniform low 0.6 mm profile but differ in length depending upon the number of lines the device supports.
EClamp237xP devices are available immediately in production quantities and are priced from $0.25 each to $0.45 each in 10,000-piece lots.
