more robust clock source than crystal or ceramic res-

onator-based oscillator circuits.

Initial Power-Up and Operation

An internal-undervoltage lockout function holds the

clock output low until the supply voltage has risen

above 2.5V. The clock output then starts at the frequen-

cy selected by SPEED.

Extended Temperature Operation

The MAX7383 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 MAX7383 operates with power-supply voltages

from 2.7V and 5.5V. 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.

Use a larger value of bypass capacitor recommended

if the MAX7383 is to operate with a large capacitive

load. Use a bypass capacitor value of at least 1000

times that of the output load capacitance.

Chip Information

TRANSISTOR COUNT: 2937

PROCESS: BiCMOS

Silicon Oscillator with Low-Power

Frequency Switching

_______________________________________________________________________________________

7

GND

SPEED

1

5

E.C.

CLOCK

MAX7383

SOT23

TOP VIEW

2

34

Pin Configuration