MAX7375_V01 [MAXIM]
3-Pin Silicon Oscillator;
| 型号： | MAX7375_V01 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 3-Pin Silicon Oscillator |
| 文件： | 总7页 (文件大小：1030K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MAX7375
3-Pin Silicon Oscillator
General Description
Features
● 2.7V to 5.5V Operation
The MAX7375 is a silicon oscillator, intended as a low-cost
improvement replacing ceramic resonators, crystals, and
crystal oscillator modules used as the clock source for micro-
controllers and UARTs in 3V, 3.3V, and 5V applications.
● Factory-Trimmed Oscillator (600kHz to 9.99MHz)
● No External Components Required
● ±10mA Output Drive Current
● 2% Initial Accuracy
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.
● ±50ppm/°C Temp Drift
● Fast Startup Time: 5µs
● 40% to 60% Maximum Duty Cycle
● 5ns Output Rise and Fall Time-Low EMI
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 tem-
perature range, the oscillator is a good choice for demanding
home appliance environments.
● Very Low EMI Susceptibility-No High-Impedance
Nodes
● Very Low Jitter: 160ps
at 8MHz
P-P
● Tiny Surface-Mount Package (SC70)
● -40°C to +125°C Temperature Range
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 sec-
tion for extended operating temperature range.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX7375AXR105-T
MAX7375AXR185-T
MAX7375AXR365-T
MAX7375AXR375-T
MAX7375AXR405-T
MAX7375AXR425-T
MAX7375AXR805-T
-40°C to +125°C 3 SC70-3
-40°C to +125°C 3 SC70-3
-40°C to +125°C 3 SC70-3
-40°C to +125°C 3 SC70-3
-40°C to +125°C 3 SC70-3
-40°C to +125°C 3 SC70-3
-40°C to +125°C 3 SC70-3
Applications
● White Goods
● Appliances and Controls ● Microcontroller Systems
● Hand-Held Products
● Portable Equipment
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 ver-
sions available in tape-and-reel only.
Typical Application Circuit
2.7V TO 5.5V
µC
OSC1
CLOCK
V+
MAX7375
Pin Configuration and Selector Guide appear at end of data
sheet.
GND
OSC2
19-3060; Rev 4; 4/14
MAX7375
3-Pin Silicon Oscillator
Absolute Maximum Ratings
V+ to GND...............................................................-0.3V to +6V
CLOCK to GND...........................................-0.3V to (V+ + 0.3V)
Continuous Power Dissipation (T = +70°C)
A
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
3-Pin SC70 (derate 2.9mW/°C over +70°C)................235mW
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.
Electrical Characteristics
(V+ = 2.7V to 5.5V, T = -40°C to +125°C, unless otherwise noted. Typical values are at V+ = 5V, T = +25°C, unless otherwise noted.)
A
A
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
5.5
UNITS
Operating Supply Voltage
Operating Supply Current
V+
2.7
V
MAX7375A_R105
0.55
0.8
1.7
3.2
1.1
MAX7375A_R185
MAX7375A_R405
MAX7375A_R805
1.25
4.2
I+
mA
6.4
V+ ≥ 2.7V, I
V+ ≥ 4.5V, I
= 2.5mA
= 9mA
V+ - 0.4
V+ - 0.4
SOURCE
Output High Voltage
Output Low Voltage
V
V
V
OH
SOURCE
V+ ≥ 2.7, I
= 10mA
0.4
0.4
SINK
V
OL
V+ ≥ 4.5V, I
= 20mA
SINK
V+ = 3.0V,
MAX7375A_R_ _ _
MAX7375A_R_ _ _
-2
-4
+2
+4
T
= +25°C (Note 2)
A
Initial CLOCK Frequency
Accuracy
f
%
CLOCK
V+ = 2.7V to 5.5V,
= +25°C (Note 2)
T
A
CLOCK Frequency Temperature
Sensitivity
(Note 3)
(Note 3)
±50
52
±325 ppm/°C
57
Duty Cycle
45
%
Observation for 20s using a 500MHz
oscilloscope (MAX7375A_R805)
Output Jitter
160
ps
P-P
Output Rise Time
Output Fall Time
t
(Note 3)
(Note 3)
5.0
2.5
ns
ns
R
t
F
Note 1: All parameters are tested at T = +25°C. Specifications over temperature are guaranteed by design and characterization.
A
Note 2: Typical frequencies are nominal values.
Note 3: Guaranteed by design and characterization. Not production tested.
Maxim Integrated
│ 2
www.maximintegrated.com
MAX7375
3-Pin Silicon Oscillator
Typical Operating Characteristics
(V+ = 5V, T = +25°C, C = 10pF, 8MHz output, unless otherwise noted.)
A
L
DUTY CYCLE vs. TEMPERATURE
DUTY CYCLE vs. SUPPLY VOLTAGE
SUPPLY CURRENT vs. TEMPERATURE
55
54
53
52
51
50
49
48
47
46
45
55
53
51
49
47
45
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
V+ = 5V
V+ = 3.3V
V+ = 2.7V
-40 -25 -10
5
20 35 50 65 80 95 110 125
2.7
3.4
4.1
4.8
5.5
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
FREQUENCY vs. SUPPLY VOLTAGE
FREQUENCY vs. TEMPERATURE
1.020
1.015
1.010
1.005
1.000
0.995
0.990
0.985
0.980
4.0
3.5
3.0
2.5
2.0
1.5
1.0
1.002
1.000
0.998
0.996
0.994
0.992
0.990
2.7
3.4
4.1
4.8
5.5
2.7
3.4
4.1
4.8
5.5
-40 -15
10
35
60
85 110 135
SUPPLY VOLTAGE (V)
SUPPLY CURRENT vs. FREQUENCY
V+ = 5.5V
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
CLOCK OUTPUT WAVEFORM
WITH CL = 10pF
SETTLING TIME FROM START
MAX7375 toc08
MAX7375 toc09
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
CLOCK
2V/div
V+ = 5V
CLOCK
1V/div
V+ = 3.3V
V+
2V/div
V+ = 2.7V
V+ = 3.3V
V+ = 3.3V
0.5
2.5
4.5
6.5
8.5
1µs/div
40ns/div
FREQUENCY (MHz)
Maxim Integrated
│
3
www.maximintegrated.com
MAX7375
3-Pin Silicon Oscillator
Typical Operating Characteristics (continued)
(V+ = 5V, T = +25°C, C = 10pF, 8MHz output, unless otherwise noted.)
A
L
CLOCK OUTPUT WAVEFORM
CLOCK OUTPUT WAVEFORM
WITH C = 50pF
WITH C = 100pF
L
L
MAX7375 toc10
MAX7375 toc11
CLOCK
1V/div
CLOCK
1V/div
V+ = 3.3V
V+ = 3.3V
40ns/div
40ns/div
Pin Description
PIN
NAME
FUNCTION
SC70
1
2
3
V+
Positive Supply Voltage
CLOCK
GND
Clock Output. Output is push-pull.
Ground
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.
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.
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.
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.
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.
Oscillator
The clock output is a push-pull configuration and is capa-
ble of driving a ground-connected 1kΩ load or a positive
Maxim Integrated
│ 4
www.maximintegrated.com
MAX7375
3-Pin Silicon Oscillator
Extended Temperature Operation
Applications Information
The MAX7375 was tested to +135°C during product
characterization and shown to function normally at this
temperature (see Typical Operating Characteristics).
However, production test and qualification is only per-
formed from -40°C to +125°C at this time. Contact the
factory if operation outside this range is required.
Interfacing to a Microcontroller Clock Input
The MAX7375 clock output is a push-pull, CMOS, logic
output, which directly drives any microprocessor (µP) or
microcontroller (µC) clock input. There are no impedance-
matching issues when using the MAX7375. Operate
the MAX7375 and microcontroller (or other clock input
device) from the same supply voltage level. Refer to the
microcontroller data sheet for clock input compatibility
with external clock signals.
Power-Supply Considerations
The MAX7375 operates with power-supply voltages in
the 2.7V to 5.5V range. Good power-supply decoupling
is needed to maintain the power-supply rejection per-
formance of the MAX7375. Use a 0.1µF surface-mount
ceramic capacitor connected between V+ and GND and
mounted as close as possible to the device. If possible,
mount the MAX7375 close to the microcontroller’s decou-
pling capacitor so that additional decoupling is not required.
The MAX7375 requires no biasing components or load
capacitance. When using the MAX7375 to retrofit a crys-
tal oscillator, remove all biasing components from the
oscillator input.
Startup Performance
The MAX7375 oscillator output stabilizes within a few
cycles of operation after V+ rises to a sufficient voltage to
start the oscillator, typically 1.65V at +25°C. Use a reset
or similar voltage-detection circuit to disable devices con-
nected to the MAX7375 until 5µs after the voltage on V+
has risen above 2.7V.
A larger value of bypass capacitor is recommended if the
MAX7375 is to operate with a large capacitive load. Use
a bypass capacitor value of at least 1000 times that of the
output load capacitance.
Selector Guide
Pin Configuration
PART
FREQUENCY (MHz)
TOP MARK
AOV
TOP VIEW
MAX7375AXR105
MAX7375AXR185
MAX7375AXR365
MAX7375AXR375
MAX7375AXR405
MAX7375AXR425
MAX7375AXR805
1.00
1.84
3.58
3.69
4.00
4.19
8.00
AOU
V+
1
2
AOT
AOS
MAX7375AXR
SC70
3
GND
AOR
CLOCK
AOQ
AOP
Chip Information
PROCESS: BiCMOS
Maxim Integrated
│ 5
www.maximintegrated.com
MAX7375
3-Pin Silicon Oscillator
Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
PACKAGE TYPE
PACKAGE CODE
DOCUMENT NO.
21-0075
LAND PATTERN NO.
90-0208
3 SC70
X3-2
Maxim Integrated
│ 6
www.maximintegrated.com
MAX7375
3-Pin Silicon Oscillator
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
10/03
—
0
1
2
3
4
Initial release
—
—
—
—
—
—
12/07
4/14
Removed all references to MAX7375AUR_ and SOT23 package
Removed automotive reference from General Description and Applications
1, 2, 4, 5
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
©
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2014 Maxim Integrated Products, Inc.
│ 7
相关型号：
©2020 ICPDF网 联系我们和版权申明