MAX7382CMUK+T

MAX7382CMUK+T Datasheet

MAX7382

Part	Datasheet
MAX7382CMUK+T	MAX7382CMUK+T (pdf)

Related Parts	Information
MAX7382CMUT+T	MAX7382CMUT+T
MAX7382CMVB+T	MAX7382CMVB+T
MAX7382CMYN+T	MAX7382CMYN+T
MAX7382CMWB+T	MAX7382CMWB+T
MAX7382CMVT+T	MAX7382CMVT+T

PDF Datasheet Preview
MAX7382 Silicon Oscillator with Reset Output and Enable The MAX7382 silicon oscillator replaces ceramic resonators, crystals, and crystal-oscillator modules as the clock source for microcontrollers in 3V, 3.3V, and 5V applications. The MAX7382 features a factory-programmed oscillator, a microprocessor µP power-onreset POR supervisor, and a clock enable input. Unlike typical crystal and ceramic-resonator oscillator circuits, the MAX7382 is resistant to vibration and EMI. The high-output-drive current and absence of highimpedance nodes makes the oscillator less susceptible to dirty or humid operating conditions. With a wide operating temperature range, the MAX7382 is a good choice for demanding home appliance and automotive environments. The MAX7382 is available with factory-programmed frequencies ranging from 10MHz to 16MHz. See Table 2 for standard frequencies and contact the factory for custom frequencies and POR thresholds. The MAX7382 is available in a 5-pin SOT23 package. The MAX7382 operating temperature range is -40°C to +125°C. White Goods Automotive Consumer Products Appliances and Controls Handheld Products Portable Equipment Microcontroller Systems 2.7V to 5.5V Operation 10MHz to 16MHz Oscillator Integrated POR Factory Programmable ±10mA Clock Output Drive Capability Clock Enable Input Initial Accuracy ±100ppm/°C Frequency Drift 50% Duty Cycle 5ns Output Rise and Fall Time Typical 4.5mA Operating Current at 16MHz Typical 0.5µA Shutdown Supply Current -40°C to +125°C Temperature Range Small 5-Pin SOT23 Package Ordering Information PART* TEMP RANGE PINPACKAGE RESET OUTPUT Active-low MAX7382B_ _-T -40°C to +125°C 5 SOT23-5 push-pull MAX7382C_ _-T -40°C to +125°C 5 SOT23-5 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 Operating Circuit VCC 2.7V TO 5.5V 0.1µF VCC CLOCK OSC1 OSC2 MAX7382 ENABLE Pin Configuration appears at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at MAX7382 Silicon Oscillator with Reset Output and Enable ABSOLUTE MAXIMUM RATINGS VCC to GND to +6.0V All Other Pins to VCC + 0.3V CLOCK, RST Current Input Current ENABLE Continuous Power Dissipation TA = +70°C 5-Pin SOT23 derate 7.1mW/°C above +70°C ....571mW U5-2 Operating Temperature Range .........................-40°C to +125°C Junction Temperature Storage Temperature Range .............................-65°C to +150°C Lead Temperature soldering, 10s .................................+300°C 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 Typical Operating Circuit, VCC = 3.0V to 5.5V, TA = -40°C to +125°C. Typical values are at VCC = 5.0V, TA = +25°C, unless otherwise noted. Notes 1 and 2 PARAMETER Operating Supply Voltage Operating Supply Current Shutdown Supply Current LOGIC INPUTS ENABLE Input High Voltage Input Low Voltage Input Current CLOCK OUTPUT High Voltage Output Low Voltage Clock Frequency Accuracy Clock Temperature Coefficient CONDITIONS fCLOCK = 16MHz, VCC = 5.5V, no load fCLOCK = 14MHz, VCC = 5.5V, no load ICC fCLOCK = 12MHz, VCC = 5.5V, no load fCLOCK = 11MHz, VCC = 5.5V, no load fCLOCK = 10MHz, VCC = 5.5V, no load ISHDN ENABLE = 0V MIN TYP MAX UNITS VCC = VENABLE = 5.5V x VCC x VCC VOH VOL fCLOCK VCC = 4.5V, ISOURCE = 7.0mA VCC = 3.0V, ISOURCE = 2.0mA for MAX7382xSxx VCC = 4.5V, ISINK = 20mA VCC = 3.0V, ISINK = 10mA VCC = 5V for MAX7382xMxx or VCC = 3.3V for MAX7382xSxx , TA = +25°C, deviation from nominal frequency VCC = 3.0V to 5.5V, TA = +25°C, deviation from nominal frequency Note 3 ±100 ±550 ppm/°C MAX7382 Silicon Oscillator with Reset Output and Enable ELECTRICAL CHARACTERISTICS continued Typical Operating Circuit, VCC = 3.0V to 5.5V, TA = -40°C to +125°C. Typical values are at VCC = 5.0V, TA = +25°C, unless otherwise noted. Notes 1 and 2 PARAMETER Duty Cycle Output Period Jitter Output Rise Time Output Fall Time Power-On-Reset Threshold Accuracy CONDITIONS Note 3 fOUT = 16MHz period jitter 10% to 90%, CL = 10pF Reset Output. Open-drain or push-pull output. See the Ordering Information. Positive Supply Voltage. Bypass VCC to GND with a 0.1µF capacitor. ENABLE Active High Clock Enable Input. See the ENABLE Input section for more details. Detailed Description The MAX7382 is a clock generator with integrated reset for microcontrollers µCs and UARTs in 3V, 3.3V, and 5V applications. The MAX7382 is a replacement for crystal-oscillator modules, crystals, or ceramic resonators, and a system reset IC. The clock frequency and reset threshold voltage are factory trimmed to specific values see Tables 1 and A variety of popular standard frequencies are available. No external components are required for setting or adjusting the frequency. Oscillator The push-pull clock output is enabled when VCC > VTH Table 1 and drives a load to within 400mV of either supply rail. The clock output remains stable over the full operating voltage range and does not generate short output cycles during either power-on or changing of the frequency. A typical oscillating startup is shown in the Typical Operating Characteristics. ENABLE Input The MAX7382 has an active-high enable input that controls the clock and reset outputs. The clock output is driven low and RST asserts when the device is disabled. Drive ENABLE low to disable the clock output on next rising edge. Drive ENABLE high to activate the clock output. Silicon Oscillator with Reset Output and Enable MAX7382 Applications Information Interfacing to a Microcontroller Clock Input The MAX7382 clock output is a push-pull, CMOS, logic output that directly drives a µP or µC clock input. There are no impedance-matching issues when using the MAX7382. Refer to the microcontroller data sheet for clock input compatibility with external clock signals. The MAX7382 requires no biasing components or load capacitance. When using the MAX7382 to retrofit a crystal oscillator, remove all biasing components from the oscillator input. Reset Output The MAX7382 is available with two reset output stage options push-pull active-low and open-drain active-low. RST is asserted when the monitored input VCC drops below the internal VTH threshold and remains asserted for 120µs after the monitored input exceeds the internal VTH threshold. The open-drain RST output requires an external pullup resistor. Output Jitter The MAX7382’s jitter performance is given in the Electrical Characteristics table as a period jitter value. Jitter measurements are approximately proportional to the period of the output of the device. The jitter performance of all clock sources degrades in the presence of mechanical and electrical interference. The MAX7382 is relatively immune to vibration, shock, and EMI influences and thus provides a considerably more robust clock source than crystal or ceramic resonatorbased oscillator circuits. VCC 2.7V TO 5.5V MAX7382 POR ENABLE LOGIC OSCILLATOR Figure Functional Diagram RST CLOCK Table Standard Reset Threshold Levels SUFFIX S M RESET THRESHOLD V standard value standard value Contact factory for nonstandard reset threshold options from 2.5V < VTH < 4.38V. Table Standard Frequencies SUFFIX STANDARD FREQUENCY MHz For all other frequency options, contact factory. Table Standard Part Numbers PART MAX7382CSUK MAX7382CSUT MAX7382CSVB MAX7382CSVT MAX7382CSWB MAX7382CMUK MAX7382CMUT MAX7382CMVB MAX7382CMVT MAX7382CMWB RESET THRESHOLD FREQUENCY MHz 10 11 12 14 16 10 11 12 14 16 TOP MARK AEVU AEYG AEVM AEYI AEVK AEXV AEXW AEVJ AEXX AEVH Initial Power-Up and Operation An internal power-up reset holds the clock output low and asserts RST until the supply voltage has risen above the power-on- reset threshold VTH . RST holds the microcontroller in a reset condition until 120µs after the clock has started up. This reset delay ensures that the clock output and the microcontroller’s internal clock circuits have stabilized before the system is allowed to start. Typical microcontroller reset delay ranges from 1ms to 250ms to allow a slow crystal oscillator circuit to start up. The MAX7382 has a fast startup, eliminating the need for such a long reset delay. MAX7382

PDF Datasheet Preview

MAX7382

Silicon Oscillator with Reset Output and Enable

The MAX7382 silicon oscillator replaces ceramic resonators, crystals, and crystal-oscillator modules as the clock source for microcontrollers in 3V, 3.3V, and 5V applications. The MAX7382 features a factory-programmed oscillator, a microprocessor µP power-onreset POR supervisor, and a clock enable input.

Unlike typical crystal and ceramic-resonator oscillator circuits, the MAX7382 is resistant to vibration and EMI. The high-output-drive current and absence of highimpedance nodes makes the oscillator less susceptible to dirty or humid operating conditions. With a wide operating temperature range, the MAX7382 is a good choice for demanding home appliance and automotive environments.

The MAX7382 is available with factory-programmed frequencies ranging from 10MHz to 16MHz. See Table 2 for standard frequencies and contact the factory for custom frequencies and POR thresholds.

The MAX7382 is available in a 5-pin SOT23 package. The MAX7382 operating temperature range is -40°C to +125°C.

White Goods

Automotive

Consumer Products

Appliances and Controls

Handheld Products

Portable Equipment

Microcontroller Systems
2.7V to 5.5V Operation 10MHz to 16MHz Oscillator Integrated POR Factory Programmable ±10mA Clock Output Drive Capability Clock Enable Input Initial Accuracy ±100ppm/°C Frequency Drift 50% Duty Cycle 5ns Output Rise and Fall Time Typical 4.5mA Operating Current at 16MHz Typical 0.5µA Shutdown Supply Current -40°C to +125°C Temperature Range Small 5-Pin SOT23 Package
Ordering Information

PART*

TEMP RANGE

PINPACKAGE

RESET OUTPUT

Active-low MAX7382B_ _-T -40°C to +125°C 5 SOT23-5 push-pull

MAX7382C_ _-T -40°C to +125°C 5 SOT23-5 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 Operating Circuit

VCC 2.7V TO 5.5V
0.1µF

VCC CLOCK

OSC1

OSC2

MAX7382

ENABLE

Pin Configuration appears at end of data sheet.

Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at

MAX7382

Silicon Oscillator with Reset Output and Enable

ABSOLUTE MAXIMUM RATINGS

VCC to GND to +6.0V All Other Pins to VCC + 0.3V CLOCK, RST Current Input Current ENABLE Continuous Power Dissipation TA = +70°C
5-Pin SOT23 derate 7.1mW/°C above +70°C ....571mW U5-2

Operating Temperature Range .........................-40°C to +125°C Junction Temperature Storage Temperature Range .............................-65°C to +150°C Lead Temperature soldering, 10s .................................+300°C

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

Typical Operating Circuit, VCC = 3.0V to 5.5V, TA = -40°C to +125°C. Typical values are at VCC = 5.0V, TA = +25°C, unless otherwise noted. Notes 1 and 2

PARAMETER Operating Supply Voltage

Operating Supply Current

Shutdown Supply Current LOGIC INPUTS ENABLE Input High Voltage Input Low Voltage Input Current CLOCK OUTPUT High Voltage

Output Low Voltage

Clock Frequency Accuracy

Clock Temperature Coefficient

CONDITIONS
fCLOCK = 16MHz, VCC = 5.5V, no load fCLOCK = 14MHz, VCC = 5.5V, no load

ICC fCLOCK = 12MHz, VCC = 5.5V, no load fCLOCK = 11MHz, VCC = 5.5V, no load fCLOCK = 10MHz, VCC = 5.5V, no load

ISHDN ENABLE = 0V

MIN TYP MAX UNITS

VCC = VENABLE = 5.5V
x VCC
x VCC

VOH VOL fCLOCK

VCC = 4.5V, ISOURCE = 7.0mA VCC = 3.0V, ISOURCE = 2.0mA for MAX7382xSxx

VCC = 4.5V, ISINK = 20mA VCC = 3.0V, ISINK = 10mA

VCC = 5V for MAX7382xMxx or VCC = 3.3V for MAX7382xSxx , TA = +25°C, deviation from nominal frequency

VCC = 3.0V to 5.5V, TA = +25°C, deviation from nominal frequency

Note 3
±100 ±550 ppm/°C

MAX7382

Silicon Oscillator with Reset Output and Enable

ELECTRICAL CHARACTERISTICS continued

Typical Operating Circuit, VCC = 3.0V to 5.5V, TA = -40°C to +125°C. Typical values are at VCC = 5.0V, TA = +25°C, unless otherwise noted. Notes 1 and 2

PARAMETER Duty Cycle Output Period Jitter Output Rise Time Output Fall Time

Power-On-Reset Threshold Accuracy

CONDITIONS

Note 3
fOUT = 16MHz period jitter
10% to 90%, CL = 10pF
Reset Output. Open-drain or push-pull output. See the Ordering Information.

Positive Supply Voltage. Bypass VCC to GND with a 0.1µF capacitor.

ENABLE Active High Clock Enable Input. See the ENABLE Input section for more details.

Detailed Description

The MAX7382 is a clock generator with integrated reset for microcontrollers µCs and UARTs in 3V, 3.3V, and 5V applications. The MAX7382 is a replacement for crystal-oscillator modules, crystals, or ceramic resonators, and a system reset IC. The clock frequency and reset threshold voltage are factory trimmed to specific values see Tables 1 and A variety of popular standard frequencies are available. No external components are required for setting or adjusting the frequency.

Oscillator The push-pull clock output is enabled when VCC > VTH Table 1 and drives a load to within 400mV of either supply rail. The clock output remains stable over the full
operating voltage range and does not generate short output cycles during either power-on or changing of the frequency. A typical oscillating startup is shown in the Typical Operating Characteristics.

ENABLE Input The MAX7382 has an active-high enable input that controls the clock and reset outputs. The clock output is driven low and RST asserts when the device is disabled. Drive ENABLE low to disable the clock output on next rising edge. Drive ENABLE high to activate the clock output.

Silicon Oscillator with Reset Output and Enable

MAX7382

Applications Information

Interfacing to a Microcontroller Clock Input

The MAX7382 clock output is a push-pull, CMOS, logic output that directly drives a µP or µC clock input. There are no impedance-matching issues when using the MAX7382. Refer to the microcontroller data sheet for clock input compatibility with external clock signals. The MAX7382 requires no biasing components or load capacitance. When using the MAX7382 to retrofit a crystal oscillator, remove all biasing components from the oscillator input.

Reset Output The MAX7382 is available with two reset output stage options push-pull active-low and open-drain active-low. RST is asserted when the monitored input VCC drops below the internal VTH threshold and remains asserted for 120µs after the monitored input exceeds the internal VTH threshold. The open-drain RST output requires an external pullup resistor.

Output Jitter The MAX7382’s jitter performance is given in the Electrical Characteristics table as a period jitter value. Jitter measurements are approximately proportional to the period of the output of the device. The jitter performance of all clock sources degrades in the presence of mechanical and electrical interference. The MAX7382 is relatively immune to vibration, shock, and EMI influences and thus provides a considerably more robust clock source than crystal or ceramic resonatorbased oscillator circuits.

VCC 2.7V TO 5.5V

MAX7382 POR

ENABLE

LOGIC

OSCILLATOR

Figure Functional Diagram

RST CLOCK

Table Standard Reset Threshold Levels

SUFFIX S M

RESET THRESHOLD V standard value standard value

Contact factory for nonstandard reset threshold options from 2.5V < VTH < 4.38V.

Table Standard Frequencies

SUFFIX

STANDARD FREQUENCY MHz

For all other frequency options, contact factory.

Table Standard Part Numbers

PART

MAX7382CSUK MAX7382CSUT MAX7382CSVB MAX7382CSVT MAX7382CSWB MAX7382CMUK MAX7382CMUT MAX7382CMVB MAX7382CMVT MAX7382CMWB

RESET THRESHOLD

FREQUENCY MHz
10 11 12 14 16 10 11 12 14 16

TOP MARK

AEVU AEYG AEVM AEYI AEVK AEXV AEXW AEVJ AEXX AEVH

Initial Power-Up and Operation An internal power-up reset holds the clock output low and asserts RST until the supply voltage has risen above the power-on- reset threshold VTH .

RST holds the microcontroller in a reset condition until 120µs after the clock has started up. This reset delay ensures that the clock output and the microcontroller’s internal clock circuits have stabilized before the system is allowed to start. Typical microcontroller reset delay ranges from 1ms to 250ms to allow a slow crystal oscillator circuit to start up. The MAX7382 has a fast startup, eliminating the need for such a long reset delay.

MAX7382

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Datasheet ID: MAX7382CMUK+T 647402