The UM3699/UM3699A are dual independent ultra low RON DPDT analog switchs. These devices are designed for low operating voltage, high current switching of speaker output for cell phone applications. They can switch a balanced stereo output and can handle a balanced microphone/speaker/ring−tone generator in a monophone mode. The UM3699 has a 3.8KΩ internal shunt resistors that automatically discharge the capacitance at the normally open (NO) and normally closed (NC) terminals when they are not connected. This reduces click-and-pop noises that occur when switching audio signals between precharged points. The UM3699A has no internal shunt resistors, which make it compatible for switching data lines that keep a specific voltage when the NO or NC terminals are not connected, avoiding power loss on the shunt resistors. Both devices have a break-before-make feature that further reduces popping.

Applications
Cell Phone Speaker/Microphone Switching
Ring-tone Chip/Amplifier Switching
Four Unbalanced (Single−Ended) Switches
Stereo Balanced (Push−Pull) Switching

Features

• Supply Operation: 1.65 to 5.5 V VCC
• Function Directly from Battery
• Maximum Breakdown Voltage: 6 V
• Tiny 3x3mm QFN16 Pb−Free Package
• Low Static Power
• This is a Pb−Free Device
• Internal Shunt Resistors Reduce Click-and-pop
• Noises (UM3699 only)

Important Information
ESD Protection: HBM (Human Body Model) > 4000 V MM (Machine Model) > 400 V
Continuous Current Rating Through each Switch ±300 mA
Conforms to: JEDEC MO−220, Issue H