CF5034 Datasheet, PDF (5/6 Pages) Nippon Precision Circuits Inc – 350MHz PECL-output Oscillator ICs

CF5034 series
FUNCTIONAL DESCRIPTION
Standby Function
When OE goes LOW, the oscillator stops and the
output pins (OUT, OUTN) become high impedance.
OE
HIGH (or open)
LOW
OUT, OUTN
Either f_O or f_O/2
High impedance
Oscillator
Normal operation
Stopped
Power-saving Pull-up Resistor
The OE pin pull-up resistance changes in value in
response to the input level (HIGH or LOW). When
OE is LOW (standby state), the pull-up resistance
increases, thereby decreasing the current consump-
tion.
MEASUREMENT CIRCUITS
Measurement Circuit 1
Measurement Circuit 3
A IEE1, IEE2
Signal
Generator
VCC
C1
XIN
VCC2
R1
OUT
R1
VT
OE
OUTN
R1
GND
VOE
VCC
XIN
VCC2
R1
OUT
XOUT
VT
OUTN
R1
GND
XIN input signal 500mVp-p, sine wave
C1: 0.001µF
R1: 50Ω
V_T: V_CC − 2V
V_OE: V_CC, V_IH, V_IL
Measurement Circuit 2
VCC VCC2
A
OUT A
0.7VCC ^OE
OUTN A
GND
R1: 50Ω, V_T: V_CC − 2V
Measurement Circuit 4
VCC
XIN
VCC2
R1
OUT
VT
XOUT
OUTN
R1
TEST GND
R1: 50Ω, V_T: V_CC − 2V
XOUT = HIGH: OUT pin is fixed HIGH (V_OH).
OUTN pin is fixed LOW (V_OL).
XOUT = LOW: OUT pin is fixed LOW (V_OL).
OUTN pin is fixed HIGH (V_OH).
NIPPON PRECISION CIRCUITS INC.—5