���������������������������������������������������������������� Maxim Integrated Products 10

MAX14585/MAX14585A

Hi-Speed USB and Audio Switches with Negative Signal

Figure 4. Human Body ESD Test Model

switches accept signals from 0 to 3.6V but do not switch

according to the Functional Diagrams/Truth Table.

present, drive the audio override input (AOR) high to con-

nect ANO_ to COM_ (see the Functional Diagrams/Truth

tion. Drive AOR rail-to-rail to minimize power consumption.

Click-and-Pop Suppression (MAX14585)

The switched 700I (typ) shunt resistors on the MAX14585

automatically discharge any capacitance at the ANO_

terminals when they are unconnected from COM_. This

reduces audio click-and-pop sounds that can occur

when switching between USB and audio sources.

Applications Information

Extended ESD Protection

ESD protection structures are incorporated on all pins

to protect against electrostatic discharges up to Q2kV

(HBM) encountered during handling and assembly.

COM1 and COM2 are further protected against ESD up

to Q15kV (HBM) without damage. The ESD structures

withstand high ESD in both normal operation and

when the devices are powered down. After an ESD

event, the devices continue to function without latchup.

ESD Test Conditions

ESD performance depends on a variety of conditions.

Contact Maxim for a reliability report that documents test

setup, test methodology, and test results.

Human Body Model

Figure 4 shows the HBM. Figure 5 shows the current

waveform it generates when discharged into a low-

impedance state. This model consists of a 100pF capaci-

tor charged to the ESD voltage of interest that is then

discharged into the device through a 1.5kI resistor.

Figure 5. Human Body Current Waveform

CHARGE-CURRENT-

LIMIT RESISTOR

DISCHARGE

RESISTANCE

STORAGE

CAPACITOR

100pF

1M

Ω

1500

Ω

HIGH-

VOLTAGE

DC

SOURCE

DEVICE

UNDER

TEST

90%

36.8%

TIME

CURRENT WAVEFORM

PEAK-TO-PEAK RINGING

(NOT DRAWN TO SCALE)

10%

0

0

AMPERES