CF5072BA
155MHz VCXO Module IC
OVERVIEW
The CF5072BA is 155MHz VCXO IC. It incorporates a 155.52MHz fundamental frequency oscillator circuit
and a differential LVPECL output circuit on a single chip. The oscillator circuit features characteristics opti-
mized for VCXO operation, and includes a varicap connection pin. The CF5072BA can be configured with few
external components, making them ideal as miniature VCXO modules.
FEATURES
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I
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3.0 to 3.6V operating supply voltage range
70MHz to 200MHz oscillator frequency range
Differential LVPECL output
50 ± 5% output duty
(measured at the output crossing point)
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Output enable function
High impedance output when OE = LOW
(oscillator continues running)
−
40 to 85
°
C operating temperature range
Chip form (CF5072BA)
BLOCK DIAGRAM
VDD2
VDD1
R
P
L
S
X'tal
XIN
XC
100pF
Differential
Converter
C2
R
S
VC
C1
Pre-buffer
ECL
OUTN
C
VC
XR
R
VC
OUT
Oscillator block equivalent circuit
VSS1
OE
VSS2
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.
ORDERING INFORMATION
Device
CF5072BA
−
1
Package
Chip form
SEIKO NPC CORPORATION —1
NPC [ NIPPON PRECISION CIRCUITS INC ]
