__________Applications Information

Because the MAX1406 is not sensitive to power-supply

sequencing, no external protection diodes are required.

Any of the three supplies can power up first. However,

use proper layout techniques to ensure other devices

on your board are not damaged in case of an ESD

event.

• Minimize the ground-lead return path to the power

supply, because currents as high as 60A can pass

into the ground.

• Use a separate return path to the power supply.

• Make trace widths greater than 40 mils.

µF capacitors as

close to the MAX1406 as possible to ensure maxi-

mum ESD protection.

minimize power consumption.

___________________Chip Topography

±15kV ESD-Protected, EMC-Compliant,

230kbps, 3-Tx/3-Rx RS-232 IC

_______________________________________________________________________________________

7

R1IN

R1OUT

GND

R2IN

T2OUT

R3IN

T3OUT

T1IN

R2OUT

T2IN

R3OUT

T3IN

0.094"

0.153"

(3.89mm)

TRANSISTOR COUNT: 161

SUBSTRATE CONNECTED TO GND