MAX7383 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – Silicon Oscillator with Low-Power Frequency Switching

19-3492; Rev 0; 1/05
Silicon Oscillator with Low-Power
Frequency Switching
General Description
The MAX7383 dual-speed silicon oscillator replaces
ceramic resonators, crystals, and crystal-oscillator
modules as the primary and secondary clock source for
microcontrollers in 3V, 3.3V, and 5V applications. The
MAX7383 features a factory-programmed high-speed
oscillator, a 32.768kHz oscillator, and a clock-selector
input. The clock output can be switched at any time
between the high-speed clock and the 32.768kHz clock
for low-power operation. Switchover is synchronized
internally to provide glitch-free clock switching.
Unlike typical crystal and ceramic-resonator oscillator
circuits, the MAX7383 is resistant to vibration and EMI.
The high-output-drive current and absence of high-
impedance nodes makes the oscillator less susceptible
to dirty or humid operating conditions. With a wide
operating temperature range as standard, the
MAX7383 is a good choice for demanding home appli-
ance and automotive environments.
The MAX7383 is available with factory-programmed fre-
quencies ranging from 10MHz to 32MHz. See Table 1
for standard frequencies and contact the factory for
custom frequencies. Refer to the MAX7377 data sheet
for frequencies less than 10MHz.
The MAX7383 is available in a 5-pin SOT23 package.
The MAX7383 standard operating temperature range is
-40°C to +125°C. See the Applications Information sec-
tion for extended operating temperature range.
Applications
White Goods
Automotive
Consumer Products
Appliances and Controls
Handheld Products
Portable Equipment
Microcontroller Systems
Features
♦ 2.7V to 5.5V Operation
♦ High-Speed Oscillator from 10MHz to 32MHz
Low-Speed 32kHz Oscillator
Glitch-Free Clock-Speed Switching
♦ ±10mA Clock-Output Drive Capability
♦ 2.5% Initial Accuracy
♦ ±50ppm/°C (typ) Frequency Drift
♦ 50% Duty Cycle
♦ 5ns Output Rise and Fall Time
♦ Low Jitter: 80ps_P-P at 16MHz
♦ 4mA Operating Current at 16MHz
♦ 13µA, 32kHz Operating Current
♦ -40°C to +125°C Temperature Range
♦ Small 5-Pin SOT23 Package
Ordering Information
PART*
TEMP RANGE
PIN-
PACKAGE
RESET
OUTPUT
MAX7383AX _ _-T -40°C to +125°C 5 SOT23-5
Active high
push-pull
*The first two letters are AX. Insert the two-letter code from
Table 2 in the remaining two positions for the desired frequen-
cy range. Insert the two-letter code from Table 1 in the remain-
ing two positions for the desired frequency range. Table 1 is
located at the end of the data sheet.
Typical Operating Circuit
V_CC 2.7V TO 5.5V
0.1µF
Pin Configuration appears at end of data sheet.
V_CC
OSC1
CLOCK
OSC2
MAX7383
E.C.
µC
I/O PORT
SPEED
GND
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