MAX7384 Datasheet, PDF (1/9 Pages) Maxim Integrated Products – Silicon Oscillator with Low-Power Frequency Switching and Reset Output

19-3493; Rev 0; 11/04
Silicon Oscillator with Low-Power Frequency
Switching and Reset Output
General Description
The MAX7384 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
MAX7384 features a factory-programmed high-speed
oscillator, a 32.768kHz oscillator, a clock-selector input,
and a µP power-on-reset (POR) supervisor. 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 pro-
vide glitch-free clock switching.
Unlike typical crystal and ceramic-resonator oscillator
circuits, the MAX7384 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 oper-
ating temperature range as standard, the MAX7384 is a
good choice for demanding home appliance, industrial,
and automotive environments.
The MAX7384 is available with factory-programmed fre-
quencies ranging from 10MHz to 16MHz. See Table 1
for standard frequencies and contact the factory for
custom frequencies. Refer to the MAX7378 data sheet
for frequencies less than 10MHz.
The MAX7384 is available in an 8-pin µMAX^® package.
The MAX7384 standard operating temperature range is
-40°C to +125°C. See the Applications Information sec-
tion for extended operating temperature range.
White Goods
Automotive
Consumer Products
Appliances and Controls
Handheld Products
Portable Equipment
Microcontroller Systems
Applications
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Pin Configuration appears at end of data sheet.
Features
♦ 2.7V to 5.5V Operation
♦ High-Speed Oscillator from 10MHz to 16MHz
Low-Speed 32kHz Oscillator
Glitch-Free Clock-Speed Switching
♦ Integrated POR
♦ ±10mA Clock-Output Drive Capability
♦ 2.5% Initial Accuracy
♦ ±50ppm/°C 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
Ordering Information
PART*
TEMP RANGE
PIN-
PACKAGE
RESET
OUTPUT
MAX7384A_ _ _ -40°C to +125°C 8 µMAX
Active high
push-pull
MAX7384B_ _ _ -40°C to +125°C 8 µMAX
Active low
push-pull
MAX7384C_ _ _ -40°C to +125°C 8 µMAX
Open drain
*Standard version is shown in bold. The first letter after the part
number designates the reset output option. Insert the letter
corresponding to the desired reset threshold level from Table 1
in the next position. Insert the two-letter code from Table 2 in
the remaining two positions for the desired frequency range.
Table 1 and Table 2 are located at the end of the data sheet.
Typical Application Circuit
V_CC 2.7V TO 5.5V
0.1µF
0.1µF
V_CC V_L
CLOCK
OSC1
OSC2
MAX7384
E.C.
RST
RST/RST
µC
SPEED
GND
I/O PORT
________________________________________________________________ Maxim Integrated Products 1
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