MAXIM MAX7375 User Manual
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
General Description
The MAX7375 is a silicon oscillator, intended as a lowcost improvement replacing ceramic resonators, crystals, and crystal oscillator modules used as the clock
source for microcontrollers and UARTs in 3V, 3.3V, and
5V applications.
The MAX7375 is a fully integrated oscillator, supplied at
specific factory-trimmed frequencies with a rail-to-rail
50% duty cycle square-wave output. The oscillator frequency is generated directly without the use of a
phase-locked loop (PLL). No additional components
are used to set or adjust the frequency.
Unlike typical crystal and ceramic resonator oscillator
circuits, the MAX7375 is highly resistant to vibration
and EMI. The high output drive current and absence of
high-impedance nodes also makes the oscillator less
susceptible to dirty or humid operating conditions. With
a wide operating temperature range, the oscillator is a
good choice for demanding home appliance and automotive environments.
Available in 3-pin space-saving SC70 package, the
MAX7375 is offered in standard and nonstandard factory-set frequencies ranging from 600kHz to 9.99MHz.
See the MAX7381 data sheet for frequencies ≥10MHz.
The MAX7375’s standard operating temperature range
is -40°C to +125°C. See the Applications Information
section for extended operating temperature range.
Applications
White Goods Portable Equipment
Automotive Microcontroller Systems
Appliances and Controls
Hand-Held Products
Features
♦ 2.7V to 5.5V Operation
♦ Factory-Trimmed Oscillator (600kHz to 9.99MHz)
♦ No External Components Required
♦ ±10mA Output Drive Current
♦ 2% Initial Accuracy
♦ ±50ppm/°C Temp Drift
♦ Fast Startup Time: 5µs
♦ 40% to 60% Maximum Duty Cycle
♦ 5ns Output Rise and Fall Time-Low EMI
♦ Very Low EMI Susceptibility-No High-Impedance
Nodes
♦ Very Low Jitter: 160ps
P-P
at 8MHz
♦ Tiny Surface-Mount Package (SC70)
♦ -40°C to +125°C Temperature Range
MAX7375
3-Pin Silicon Oscillator
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-3060; Rev 3; 12/07
Typical Application Circuit
Pin Configuration and Selector Guide appear at end of data
sheet.
Note: The MAX7375 is available in factory-set frequencies from
600kHz to 9.99MHz. There are seven standard versions (1MHz,
1.84MHz, 3.58MHz, 3.69MHz, 4MHz, 4.19MHz, and 8MHz, as
shown in the Selector Guide) with a required 2.5k order increment. Nonstandard frequencies are also available with a required
10k order increment. For nonstandard versions, contact factory
for availability and ordering information. All versions available in
tape-and-reel only.
2.7V TO 5.5V
V+
CLOCK
OSC1
µC
PART TEMP RANGE PIN-PACKAGE
MAX7375AXR105-T -40°C to +125°C 3 SC70-3
MAX7375AXR185-T -40°C to +125°C 3 SC70-3
MAX7375AXR365-T -40°C to +125°C 3 SC70-3
MAX7375AXR375-T -40°C to +125°C 3 SC70-3
MAX7375AXR405-T -40°C to +125°C 3 SC70-3
MAX7375AXR425-T -40°C to +125°C 3 SC70-3
MAX7375AXR805-T -40°C to +125°C 3 SC70-3
MAX7375
GND
OSC2
MAX7375
3-Pin Silicon Oscillator
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V+ = 2.7V to 5.5V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at V+ = 5V, TA= +25°C, unless otherwise noted.)
(Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Note 1: All parameters are tested at TA= +25°C. Specifications over temperature are guaranteed by design and characterization.
Note 2: Typical frequencies are nominal values.
Note 3: Guaranteed by design and characterization. Not production tested.
V+ to GND ................................................................-0.3V to +6V
CLOCK to GND ............................................-0.3V to (V+ + 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
3-Pin SC70 (derate 2.9mW/°C over +70°C).................235mW
Operating Temperature Range .........................-55°C to +135°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Supply Voltage V+ 2.7 5.5 V
MAX7375A_R105 0.55 1.1
Operating Supply Current I+
Output High Voltage V
Output Low Voltage V
Initial CLOCK Frequency
Accuracy
CLOCK Frequency Temperature
Sensitivity
Duty Cycle (Note 3) 45 52 57 %
Output Jitter
Output Rise Time t
Output Fall Time t
OH
f
CLOCK
MAX7375A_R185 0.8 1.25
MAX7375A_R405 1.7 4.2
MAX7375A_R805 3.2 6.4
V+ ≥ 2.7V, I
V+ ≥ 4.5V, I
V+ ≥ 2.7, I
OL
V+ ≥ 4.5V, I
V+ = 3.0V,
T
A
V+ = 2.7V to 5.5V,
T
A
(Note 3) ±50 ±325 ppm/°C
Observation for 20s using a 500MHz
oscilloscope (MAX7375A_R805)
(Note 3) 5.0 ns
R
(Note 3) 2.5 ns
F
SINK
= +25°C (Note 2)
= +25°C (Note 2)
= 2.5mA V+ - 0.4
SOURCE
= 9mA V+ - 0.4
SOURCE
= 10mA 0.4
= 20mA 0.4
SINK
MAX7375A_R_
MAX7375A_R_
_ _-2 +2
_ _-4 +4
160 ps
mA
V
V
%
P-P
MAX7375
3-Pin Silicon Oscillator
_______________________________________________________________________________________ 3
Typical Operating Characteristics
(V+ = 5V, TA= +25°C, CL= 10pF, 8MHz output, unless otherwise noted.)
SUPPLY CURRENT vs. FREQUENCY
MAX7375 toc07
FREQUENCY (MHz)
SUPPLY CURRENT (mA)
6.54.52.5
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0
0.5 8.5
V+ = 5.5V
V+ = 5V
V+ = 3.3V
V+ = 2.7V
DUTY CYCLE vs. TEMPERATURE
55
54
53
52
51
50
49
DUTY CYCLE (%)
48
47
46
45
-40 125
TEMPERATURE (°C)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
4.0
3.5
3.0
2.5
2.0
SUPPLY CURRENT (mA)
1.5
1.0
2.7 5.5
SUPPLY VOLTAGE (V)
MAX7375 toc01
1109565 80-10 5 20 35 50-25
MAX7375 toc04
4.84.13.4
DUTY CYCLE vs. SUPPLY VOLTAGE
55
53
51
49
DUTY CYCLE (%)
47
45
2.7 5.5
SUPPLY VOLTAGE (V)
FREQUENCY vs. SUPPLY VOLTAGE
1.002
1.000
0.998
0.996
0.994
NORMALIZED FREQUENCY
0.992
0.990
2.7 5.5
SUPPLY VOLTAGE (V)
SUPPLY CURRENT vs. TEMPERATURE
4.0
3.5
MAX7375 toc02
3.0
2.5
2.0
1.5
SUPPLY CURRENT (mA)
1.0
0.5
4.84.13.4
0
-40 125
V+ = 2.7V
TEMPERATURE (°C)
FREQUENCY vs. TEMPERATURE
1.020
1.015
MAX7375 toc05
1.010
1.005
1.000
0.995
NORMALIZED FREQUENCY
0.990
0.985
4.84.13.4
0.980
-40 10-15 35 60 85 110 135
TEMPERATURE (°C)
V+ = 5V
MAX7375 toc03
V+ = 3.3V
1109565 80-10 5 20 35 50-25
MAX7375 toc06
CLOCK OUTPUT WAVEFORM
= 10pF
WITH C
L
V+ = 3.3V
40ns/div
MAX7375 toc09
SETTLING TIME FROM START
1µs/div
MAX7375 toc08
V+ = 3.3V
CLOCK
2V/div
V+
2V/div
CLOCK
1V/div
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