CF5035 series
1.8V, High-frequency Crystal Oscillator Module ICs
OVERVIEW
The CF5035 series are 1.8V operation, high-frequency crystal oscillator module ICs. They support 70MHz to
165MHz (1.8V) and 70MHz to 220MHz (2.5 to 3.3V) 3rd overtone oscillation and fundamental oscillation
modes. The crystal oscillator circuit is a Colpitts oscillator with the necessary oscillator capacitors and feed-
back resistor built-in. The oscillation characteristics feature little variation with supply voltage, providing sta-
ble oscillation over a wide supply voltage range. The output circuit comprises a CMOS buffer that can operate
at high frequencies and drive a 15pF capacitance load. The devices are fabricated using a proprietary BiCMOS
process with the oscillator circuit and output buffer on a single chip, making them ideal as SMD-type high-fre-
quency crystal oscillators.
FEATURES
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1.6 to 3.6V operating supply voltage range
Oscillation frequency range (varies with version)
1.6 to 3.6V: 70MHz to 165MHz
2.25 to 3.6V: 70MHz to 220MHz
– 40 to 85
°
C operating temperature range
Oscillation capacitors built-in
Inverter amplifier feedback resistor built-in
Oscillation detector function built-in
Standby function
• High impedance in standby mode, oscillator stops
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Low standby current
• Power-saving pull-up resistor built-in
CMOS output duty level
15pF output load
8mA output drive capability (V
DD
= 1.6V)
BiCMOS process
Chip form (CF5035AL
×
)
APPLICATIONS
I
1.8V, high-frequency crystal oscillator modules
SERIES CONFIGURATION
Version
CF5035ALA
CF5035ALB
CF5035ALC
CF5035ALD
2.25 to 3.6
1.6 to 3.6
Operating supply
voltage range [V]
Recommended operating
frequency range
1
[MHz]
70 to 95
95 to 125
125 to 165
165 to 220
Built-in capacitance [pF]
C
IN
4
4
2
1
C
OUT
4
4
2
1
1. The recommended operating frequency is a yardstick value derived from the crystal used for NPC characteristics authentica-
tion. However, the oscillator frequency band is not guaranteed. Specifically, the characteristics can vary greatly due to crystal
characteristics and mounting conditions, so the oscillation characteristics of components must be carefully evaluated.
ORDERING INFORMATION
Device
CF5035AL
×
–1
Package
Chip form
SEIKO NPC CORPORATION —1