VCXO (voltage controlled crystal oscillator)

A VCXO (Voltage Controlled Crystal Oscillator) is a crystal oscillator the output frequency of which is controlled by adding an external control voltage via a frequency control input on a variable capacitance component such as a varactor diode connected in parallel to a load capacitance (CL). Epson VCXOs are divided into two types according to Voltage-Frequency (V-F) characteristic slopes depending on the AFC (Automatic Frequency Control) input configuration of the VCXO. One is a VCXO with a positive V-F slope and the other is a VCXO with a negative V-F slope. Please note that the input voltage of a control circuit will vary according to the individual type, as shown in Figs. 3 and 4. Epson's VCXOs are capable of either, depending on the customer's preference. Epson's VCXOs have been increasingly used for broader applications such as slave oscillators in phased-lock loops, or frequency modulators. Among the above types, a VCXO combined with a TCXO is called a VC-TCXO , respectively. These components have the merit of delicately controlling their output frequency electrically.


VCXO (low phase noise) products

Parametric Search


Model Feature Size
[ mm ]
Output wave Frequency Range
[ MHz ]
Supply Voltage
[ V ] Typ.
Frequency tolerance
/ Operating Temperature
[ x10^-6 / ℃ to ℃ ]
Absolute Pull Range
[ x10^-6 ] Min.
Vc Range
[ V ]
Brief Sheet RoHS REACH Inventory
VG2520CAN VCXO 2.5x2.0
x0.7
CMOS 30.72 3.3 +/-50 / -40 to 85 +/- 50 1.65+/-1.65 pdf pdf pdf cart
VG7050CAN VCXO 7.0x5.0
x1.4
CMOS 30.72 3.3 +/-50 / -40 to 85 +/- 50 1.65+/-1.65 pdf pdf pdf cart
VG-4231CE VCXO 3.2x2.5
x1.05
CMOS 3 to 60 3.3
2.8
1.8
+/-30 / -20 to +70 (3.3V)
+/-37 / -40 to +85 (3.3V)
+/-30 / -20 to +70 (2.8V)
+/-37 / -40 to +85 (2.8V)
+/-30 / -20 to +70 (1.8V)
+/-37 / -40 to +85 (1.8V)
+/- 100
(+/-30 / -20 to +70 / 3.3V)
+/- 95
(+/-37 / -40 to +85 / 3.3V)
+/- 100
(+/-30 / -20 to +70 / 2.8V)
+/- 95
(+/-37 / -40 to +85 / 2.8V)
+/- 80
(+/-30 / -20 to +70 / 1.8V)
+/- 75
(+/-37 / -40 to +85 / 1.8V)
1.65+/-1.65
(3.3V)
1.4+/-1.4
(2.8V)
0.9 +/-0.9
(1.8V)
pdf pdf pdf cart
VG-4231CB VCXO 5.0x3.2
x1.2
CMOS 1 to 81 3.3 +/50 / -40 to +85
+/-50 / -20 to +70
+/-50 / 0 to 70
+/- 50 1.65+/-1.5 pdf pdf pdf cart
VG-4231CA VCXO 7.0x5.0
x1.4
CMOS 1 to 60 5.0
3.3
+/-50 / -40 to 85 (5V)
+/-35 / -20 to 70 (5V)
+/-50 / -40 to 85 (3.3)
+/-35 / -20 to 70 (3.3)
+/- 65
(+/-50 / -40 to +85 / 5.0V)
+/- 80
(+/-35 / -20 to +70 / 5.0V)
+/- 65
(+/-50 / -40 to +85 / 3.3V)
+/- 80
(+/-35 / -20 to +70 / 3.3V)
2.5+/-2
(5.0V)
1.65+/-1.5
(3.3V)
pdf pdf pdf cart
VG-4232CA VCXO 7.0x5.0
x1.4
CMOS 60 to 80 3.3 +/-50 / -40 to +85
+/-50 / -20 to +70
+/-50 / 0 to 70
+/- 50 1.65+/-1.65 pdf pdf pdf cart
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