Silicon Oscillator with Reset Output

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7

Initial Power-Up and Operation

An internal power-up reset holds the clock output low

until the supply voltage has risen above the power-on-

RST holds the microcontroller in a reset condition until

120µs after the clock has started up. This reset delay

ensures that the clock output and the microcontroller’s

internal clock circuits have stabilized before the system

is allowed to start. Typical microcontroller reset delay

ranges from 1ms to 250ms to allow a slow crystal oscil-

lator circuit to start up. The MAX7382 has a fast startup,

eliminating the need for such a long reset delay.

Extended Temperature Operation

The MAX7382 was tested to +135

°C during product char-

acterization and shown to function normally at this tem-

perature (see the Typical Operating Characteristics).

However, production test and qualification is only per-

formed from -40

°C to +125°C at this time. Contact the fac-

tory if operation outside this range is required.

Power-Supply Considerations

The MAX7382 operates with a 2.7V and 5.5V power-

supply voltage. Good power-supply decoupling is

needed to maintain the power-supply rejection perfor-

0.1µF surface-mount ceramic capacitor. Mount the

bypassing capacitor as close to the device as possible.

If possible, mount the MAX7382 close to the microcon-

troller’s decoupling capacitor so that additional decou-

pling is not required. Use a larger value of bypass

capacitor recommended if the MAX7382 is to operate

with a large capacitive load. Use a bypass capacitor

value of at least 1000 times that of the output load

capacitance.

GND

RST

1

5

E.C.

CLOCK

MAX7382

SOT23

TOP VIEW

2

34

Pin Configuration

Chip Information

TRANSISTOR COUNT: 2937

PROCESS: BiCMOS