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
ꢀ 3.0 to 3.6V supply voltage range
ꢀ 10MHz to 60MHz operating frequency
(varies with version)
ꢀ CMOS output level
ꢀ 50 10ꢀ output duty
ꢀ 6mA (min) output drive capability
ꢀ Uses negative-resistance switching function
ꢀ Varicap diode built-in
ꢀ 15pF output load capacitance C
ꢀ Standby function
L
ꢀ Frequency divider built-in (varies with version: f ,
(high impedance in standby mode)
O
f /2, f /4, f /8, f /16, f /32)
ꢀ Chip form (CF5073××)
O
O
O
O
O
SERIES LINEUP
Output frequency
Typicaloscillation
1
Version
frequency [MHz]
2
2
2
2
2
CF5073×1
CF5073×2
CF5073×3
CF5073×4
CF5073×5
CF5073×6
CF5073A×
CF5073B×
CF5073C×
CF5073D×
CF5073E×
CF5073F×
16
23
30
37
44
51
f
f /2
O
f /4
O
f /8
O
f /16
O
f /32
O
O
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
ꢀ VCXO modules
ꢀ Communications application
ꢀ Networking application
ꢀ Broadcasting application
ORDERING INFORMATION
Device
Package
CF5073××−1
Chip form
SEIKO NPC CORPORATION —1