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11

Applications Information

Hot Insertion

SDA, SCL, AD0, AD2, and RST are overvoltage protect-

ed to +6V independent of V+. This allows the MAX7320

to be operated from a lower supply voltage, such as

logic level, such as +5V.

Each of the output ports, O0–O7, has a protection

diode to V+ and to GND (Figure 8). When a port output

is driven to a voltage higher than V+ or lower than

GND, the appropriate protection diode clamps the out-

put to a diode drop above V+ or below GND. When the

MAX7320 is powered down (V+ = 0V), each output port

appears as a diode connected to GND (Figure 8).

Power-Supply Considerations

The MAX7320 operates with a supply voltage of +1.71V

to +5.5V over the -40°C to +125°C temperature range.

Bypass V+ to GND with a ceramic capacitor of at least

0.047µF as close to the device as possible. For the TQFN

version, additionally connect the exposed pad to GND.

Figure 8. Output Port Structure

V+

V+

PORT

MAX7320

CONTROL

O0

O3

O2

O1

O4

O5

O6

O7

OUTPUT

PORTS

GND

V+

POWER-

ON RESET

INPUT

FILTER

RST

SDA

SCL

AD2

AD0

MAX7320

Functional Block Diagram