Rainbow Electronics MAX7375 - Manual (Page 5)

Applications Information
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 imped-
ance-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.
The MAX7375 requires no biasing components or load
capacitance. When using the MAX7375 to retrofit a
crystal 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 connected to the MAX7375 until 5µs after the
voltage on V+ has risen above 2.7V.
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 to the device as possible. If pos-
sible, mount the MAX7375 close to the microcontroller’s
decoupling capacitor so that additional decoupling is
not required.
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.
Chip Information
TRANSISTOR COUNT: 432
PROCESS: BiCMOS
MAX7375
3-Pin Silicon Oscillator
_______________________________________________________________________________________ 5
PART FREQUENCY (MHz) TOP MARK
MAX7375AXR105 1 AOV
MAX7375AXR185 1.8432 AOU
MAX7375AXR365 3.579545 AOT
MAX7375AXR375 3.6864 AOS
MAX7375AXR405 4 AOR
MAX7375AXR425 4.1943 AOQ
MAX7375AXR805 8 AOP
MAX7375AUR105 1 FZPZ
MAX7375AUR185 1.8432 FZPT
MAX7375AUR365 3.579545 FZPU
MAX7375AUR375 3.6864 FZPV
MAX7375AUR405 4 FZPY
MAX7375AUR425 4.1943 FZPW
MAX7375AUR805 8 FZPX
Selector Guide