CF5073 series
VCXO Module ICs with Built-in Varicap
OVERVIEW
The CF5073 series are VCXO ICs with built-in varicap diode. They use a recently developed negative-resis-
tance switching oscillation circuit, at oscillation startup and during normal oscillation, for both good oscilla-
tion startup characteristics and wide pullrange. Furthermore, it employs a CMOS process varicap diode, and
also features all the necessary VCXO structure circuit components on a single chip, forming a VCXO module
with just the connection of an external crystal.
FEATURES
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I
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I
I
3.0 to 3.6V supply voltage range
10MHz to 60MHz operating frequency
(varies with version)
Uses negative-resistance switching function
Varicap diode built-in
Frequency divider built-in (varies with version: f
O
,
f
O
/2, f
O
/4, f
O
/8, f
O
/16, f
O
/32)
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CMOS output level
50 ± 10% output duty
6mA (min) output drive capability
15pF output load capacitance C
L
Standby function
(high impedance in standby mode)
Chip form (CF5073
××
)
SERIES LINEUP
Version
CF5073A
×
CF5073B
×
CF5073C
×
CF5073D
×
CF5073E
×
CF5073F
×
Typical oscillation
frequency
1
[MHz]
16
23
30
37
44
51
f
O
f
O
/2
f
O
/4
f
O
/8
f
O
/16
f
O
/32
Output frequency
CF5073×1
CF5073×2
2
CF5073
×
3
2
CF5073
×
4
2
CF5073
×
5
2
CF5073
×
6
2
1. The typical oscillation frequency is the oscillation frequency criteria for use when selecting the device version. Note that the oscillation
characteristics and pullability vary with the crystal used and the mounting conditions. Even for the same frequency, the optimal version can vary
with crystal characteristics, so careful evaluation should be exercised when selecting the device version.
2. These versions are produced after receiving a purchase order. Please ask our Sales & Marketing section for further detail.
APPLICATIONS
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VCXO modules
Communications application
Networking application
Broadcasting application
ORDERING INFORMATION
Device
CF5073
××−
1
Package
Chip form
SEIKO NPC CORPORATION —1
SEIKO [ SEIKO EPSON CORPORATION ]
