CF5072 series
155MHz VCXO Module ICs
OVERVIEW
The CF5072 series are 155MHz VCXO ICs. They incorporate a 155.52MHz fundamental frequency oscillator
circuit and a differential LVPECL output circuit on a single chip. The oscillator circuit features characteristics
optimized for VCXO operation, and includes a varicap connection pin. The CF5072 series can be configured
with few external components, making them ideal as miniature VCXO modules.
FEATURES
I
I
I
I
BLOCK DIAGRAM
VDD2
ina
I
I
3.0 to 3.6V operating supply voltage range
80MHz to 200MHz oscillator frequency range
Differential LVPECL output
50 ± 5% output duty
(measured at the output crossing point)
I
Output enable function
High impedance output when OE = LOW
(oscillator continues running)
−
40 to 85
°
C operating temperature range
Chip form (CF5072
××
)
R
P
L
S
X'tal
lim
XIN
XC
100pF
XR
VC
R
VC
C2
R
S
C1
Oscillator block equivlent circuit
VSS1
HVC350B
pre
ORDERING INFORMATION
Device
CF5072
××−
1
Package
Chip form
ESD sensitive device:
The XR pin is not equipped with a protection circuit. Accordingly, its electrostatic withstand voltage is significantly lower
than that of the other pins.
ESD breakdown prevention handling precautions are strongly recommended.
ry
Differential
Converter
Pre-buffer
ECL
OE
VDD1
OUTN
OUT
VSS2
NIPPON PRECISION CIRCUITS INC.—1
SEIKO [ SEIKO EPSON CORPORATION ]
