MAX7384CRUK ,10 MHz, 2.7 V to 5.5 V, silicon oscillator with low-power frequency switching and reset outputfeatures a factory-programmed high-speed♦ Integrated PORoscillator, a 32.768kHz oscillator, a clock ..
MAX738A ,5V, Step-Down, Current-Mode PWM DC-DC ConvertersApplicationsMAX730AC/D 0°C to +70°C Dice*Portable InstrumentsMAX730AEPA -40°C to +85°C 8 Plastic DI ..
MAX738ACPA ,5V, Step-Down, Current-Mode PWM DC-DC Converters
MAX738ACPA ,5V, Step-Down, Current-Mode PWM DC-DC Converters
MAX738ACPA+ ,5V, Step-Down, Current-Mode PWM DC-DC ConvertersMAX730A/MAX738A/MAX744A19-0165; Rev 2; 1/965V, Step-Dow n,Current-Mode PWM DC-DC Converters________ ..
MAX738AEPA ,5V / Step-Down / Current-Mode PWM DC-DC ConvertersELECTRICAL CHARACTERISTICS(Circuit of Figure 3, V+ = 9V for the MAX730A, V+ = 12V for the MAX738A/M ..
MB6M ,MINIATURE GLASS PASSIVATED SINGLE-PHASE BRIDGE RECTIFIERThermal Characteristics (TA = 25°C unless otherwise noted)Parameter Symbol MB2M MB4M MB6M UnitDevic ..
MB6S ,Bridge RectifiersThermal Characteristics (T = 25°C unless otherwise noted)AParameter Symbol MB2S MB4S MB6S UnitDevic ..
MB7117E , Schottky TTL 2048-Bit Bipolar Programmable Read-Only Memory
MAX7384CRUK
10 MHz, 2.7 V to 5.5 V, silicon oscillator with low-power frequency switching and reset output
General DescriptionThe 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 Informationsec-
tion for extended operating temperature range.
ApplicationsWhite Goods
Automotive
Consumer Products
Appliances and Controls
Handheld Products
Portable Equipment
Microcontroller Systems
Features2.7V to 5.5V OperationHigh-Speed Oscillator from 10MHz to 16MHz
Low-Speed 32kHz Oscillator
Glitch-Free Clock-Speed SwitchingIntegrated POR±10mA Clock-Output Drive Capability2.5% Initial Accuracy ±50ppm/°C Frequency Drift50% Duty Cycle5ns Output Rise and Fall TimeLow Jitter: 80psP-Pat 16MHz4mA Operating Current at 16MHz13µA, 32kHz Operating Current-40°C to +125°C Temperature Range
MAX7384
Silicon Oscillator with Low-Power Frequency
Switching and Reset Output
Ordering Information
Typical Application Circuit19-3493; Rev 0; 11/04
*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.
Pin Configuration appears at end of data sheet.µMAX is a registered trademark of Maxim Integrated Products, Inc.
MAX7384
Silicon Oscillator with Low-Power Frequency
Switching and Reset Output
ABSOLUTE MAXIMUM RATINGSStresses 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.
VCCto GND...........................................................-0.3V to +6.0V
All Other Pins to GND.................................-0.3V to (VCC+ 0.3V)
CLOCK, RST Current .......................................................±50mA
Input Current (SPEED)......................................................±50mA
Continuous Power Dissipation (TA= +70°C)
8-Pin µMAX(derate 4.5mW/°C above +70°C)...362mW (U8-1)
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
ELECTRICAL CHARACTERISTICS(Typical Operating Circuit, VCC= 2.7V to 5.5V, VL= VCC, TA= -40°C to +125°C. Typical values are at VCC= 5.0V, TA= +25°C,
unless otherwise noted.) (Note 1)
MAX7384
Silicon Oscillator with Low-Power Frequency
Switching and Reset Output
ELECTRICAL CHARACTERISTICS (continued)(Typical Operating Circuit, VCC= 2.7V to 5.5V, VL= VCC, TA= -40°C to +125°C. Typical values are at VCC= 5.0V, TA= +25°C,
unless otherwise noted.) (Note 1)
Note 2:Guaranteed by design. Not production tested.
Note 3:For push-pull output only.
MAX7384
Silicon Oscillator with Low-Power Frequency
Switching and Reset Output
Typical Operating Characteristics(VCC= VL= 5V, TA= +25°C, frequency = 10MHz, unless otherwise noted.)
MAX7384
Silicon Oscillator with Low-Power Frequency
Switching and Reset Output
CLOCK OUTPUT WAVEFORM
(CL = 100pF)MAX7384 toc10
20ns/div
MAXIMUM TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVEMAX7384 toc11
RESET THRESHOLD OVERDRIVE (V)
MAXIMUM TRANSIENT DURATION (s)
100m
10m
CHANNEL 1 = CLOCK, CHANNEL 2 = SPEED
10µs/div
HIGH-SPEED TO LOW-SPEED
TRANSITIONMAX7384 toc12
CHANNEL 1 = CLOCK, CHANNEL 2 = SPEED
40ns/div
HIGH-SPEED TO LOW-SPEED
TRANSITIONMAX7384 toc13
CHANNEL 1 = CLOCK, CHANNEL 2 = SPEED
10µs/div
LOW-SPEED TO HIGH-SPEED
TRANSITIONMAX7384 toc14
CHANNEL 1 = CLOCK, CHANNEL 2 = SPEED
100ns/div
LOW-SPEED TO HIGH-SPEED
TRANSITIONMAX7384 toc15131112141516
SUPPLY CURRENT vs. FREQUENCYMAX7384 toc16
FREQUENCY (MHz)
SUPPLY CURRENT (mA)
ypical Operating Characteristics (continued)(VCC= VL= 5V, TA= +25°C, frequency = 10MHz, unless otherwise noted.)
MAX7384
Detailed DescriptionThe MAX7384 is a dual-speed clock generator with inte-
grated reset for microcontrollers (µCs) and UARTs in 3V,
3.3V, and 5V applications. The MAX7384 is a replace-
ment for crystal-oscillator modules, crystals, or ceramic
resonators and a system reset IC. The high-speed clock
frequency and reset threshold voltage are factory
trimmed to specific values (see Table 1). A variety of
popular standard frequencies are available. The low-
speed clock frequency is fixed at 32.768kHz; see Table
2. No external components are required for setting or
adjusting the frequency.
OscillatorThe push-pull clock output 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 start-
up is shown in the Typical Operating Characteristics.
Clock-Speed SelectionDrive SPEED low to select slow clock speed (nominally
32.768kHz) or high to select full clock speed. SPEED can
be connected to VCCor to GND to select fast or slow
clock speed, or connected to a logic output (such as a µP
GPIO port) used to change clock speed on the fly. If
SPEED is connected to a µP GPIO port, connect a pullup
or pulldown resistor to set the clock to the preferred
speed on power-up. SPEED input bias current is 2µA
(max), so a resistor value as high as 500kΩcan be used.
Applications Information
Interfacing to a Microcontroller
Clock InputThe MAX7384 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
MAX7384. Refer to the microcontroller data sheet for
clock input compatibility with external clock signals.
The MAX7384 requires no biasing components or load
capacitance. When using the MAX7384 to retrofit a
crystal oscillator, remove all biasing components from
the oscillator input.
Reset OutputThe MAX7384 is available with three reset output stage
options: push-pull active low, push-pull active high, and
open-drain active low. RST is asserted when the moni-
tored 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 JitterThe MAX7384’s jitter performance is given in the
Electrical Characteristicstable as a peak-to-peak value
obtained by observing the output of the MAX7384 for
Silicon Oscillator with Low-Power Frequency
Switching and Reset Output
Pin Description
