Datasheet

(V+ = 5V, T
A
= +25°C, C
L
= 10pF, 8MHz output, unless otherwise noted.)
Detailed Description
The MAX7375 is a replacement for ceramic resonators,
crystals, and crystal oscillator modules as the clock
source for microcontrollers and UARTs in 3V, 3.3V, and
5V applications. The MAX7375 is an integrated oscilla-
tor, supplied at specific frequencies just like crystals and
resonators. A variety of popular standard frequencies are
available. No external components are required for setting
or adjusting the frequency.
Supply Voltages
The MAX7375 has been designed for use in systems with
nominal supply voltages of 3V, 3.3V, or 5V and is speci-
fied for operation with supply voltages in the 2.7V to 5.5V
range. Operation outside this range is not guaranteed.
See the Absolute Maximum Ratings table for limit values
of power-supply and pin voltages.
Oscillator
The clock output is a push-pull configuration and is capa-
ble of driving a ground-connected 1kΩ load or a positive
supply connected 500Ω load to within 300mV of either
supply rail. The clock output remains stable over the full
operating voltage range and does not generate short out-
put cycles during either power on or power off. A typical
startup characteristic is shown in the Typical Operating
Characteristics section.
Output Jitter
The MAX7375’s jitter performance is given in the Electrical
Characteristics table as a peak-to-peak value obtained
by observing the output of the MAX7375 for 20s with a
500MHz oscilloscope. Jitter measurements are approxi-
mately proportional to the period of the output frequency
of the device. Thus, a 4MHz part has approximately twice
the jitter value of an 8MHz part.
The jitter performance of all clock sources degrades in the
presence of mechanical and electrical interference. The
MAX7375 is relatively immune to vibration, shock, and
EMI influences and thus provides a considerably more
robust clock source than crystal- or ceramic-resonator-
based oscillator circuits.
PIN
NAME FUNCTION
SC70
1 V+ Positive Supply Voltage
2 CLOCK Clock Output. Output is push-pull.
3 GND Ground
CLOCK OUTPUT WAVEFORM
WITH C
L
= 50pF
MAX7375 toc10
40ns/div
CLOCK
1V/div
V+ = 3.3V
CLOCK OUTPUT WAVEFORM
WITH C
L
= 100pF
MAX7375 toc11
40ns/div
CLOCK
1V/div
V+ = 3.3V
MAX7375 3-Pin Silicon Oscillator
Maxim Integrated │ 4
www.maximintegrated.com
Pin Description
Typical Operating Characteristics (continued)