20.000 MHz DIP5 Voltage-Controlled Oven-Controlled Crystal Oscillator (OCXO)

Frequency: 20MHz
Supply Voltage: 5V
Temperature characteristics: ±10ppb@-20~70℃
Aging: ±1ppb/day
Diemsnion: 20.3×20.3×11mm

The 20.000 MHz Voltage-Controlled Oven-Controlled Crystal Oscillator (VCOCXO / OCXO) is housed in an industry-standard 20.3 x 20.3 x 11 mm 5-pin DIP through-hole hermetic metal enclosure. Powered by a single +5.0V DC supply, it delivers a robust square-wave output compatible with standard 15pF CMOS loads.

Engineered with a high-precision internal oven thermal-control system and an ultra-low-noise oscillation circuit, this XTALVCOCXO-2020-20MB1-5V-SQ-4070-D achieves exceptional frequency stability of ±10 ppb across the industrial temperature range of -40°C to +70°C. Following warm-up stabilization, the device exhibits an ultra-low daily aging rate of ≤ 1.0 ppb/day (with a 10-year cumulative aging within ±0.8 ppm) and a remarkable short-term frequency stability (Allan deviation) of 1.0E-11 at 1 second.

In addition, the oscillator features superior close-in phase noise performance (-110 dBc/Hz at 10 Hz and a -158 dBc/Hz noise floor), combined with excellent immunity against power and load variations (both held within ±5 ppb). An integrated +4.0V precision reference voltage output (Vref) and a high-impedance voltage control input (VC) provide smooth, linear frequency fine-tuning while resisting external control-line noise. Designed for mission-critical reliability and spectral purity, this 20MHz OCXO is an ideal master clock reference for cellular base stations, microwave transmission systems, GPS/GNSS-disciplined oscillators (GPSDO), precision frequency counters/synthesizers, and radar timing networks.

Specifications

	Parameter		Min.	Typ.	Max.	Unit	Test Condition
Power consumption	Power Supply	Rated Voltage	4.75	5.0	5.25	VDC	Vcc±5%
	Power Supply	Limiting Voltage	4.5		5.5	VDC
	Current	Start-up Current			600	mA	@Vcc±5%,25℃
	Current	Operating Current			200	mA	@Vcc±5%,25℃
Output	Nominal Frequency		20.000			MHz
	Waveform		Square Wave			—--
	Duty Cycle		45	50	55	%	Load: 15pF
	Output High Level		3.6			V	Load: 15pF
	Output Low Level				0.5	V	Load: 15pF
	Rise/Fall Time				6	nS	10%~90%
	Load		14.25	15	15.75	pF	Load ± 5%
Frequency Stability	Initial Accuracy (Factory Calibration)		-0.1		+0.1	ppm	VC = 2.0V, 25°C, 30-minute warm-up
	Aging	Daily	-1.0		+1.0	ppb	Tested after 30 days of continuous power-on
		Yearly	-0.1		+0.1	ppm	In the first year, the test was conducted after 30 consecutive days of power-on.
		Ten Years	-0.8		+0.8	ppm
	Temperature characteristics		-10		+10	ppb	-40～70℃ @25℃
	Power Characteristics		-5.0		+5.0	ppb	Vcc±5%
	Load Characteristics		-5.0		+5.0	ppb	Load ± 5%
	Short Term Frequency Stability	@t=1 s		1.0	5.0	E-11	Tested at room temperature inside a sealed enclosure, free from EMI/EMC or other interference, after 2 hours of powered operation; test equipment: 53100A.
	Phase Noise	@10Hz		-110	-105	dBc/Hz
		@100Hz		-135	-130	dBc/Hz
		@1KHz		-150	-145	dBc/Hz
		@10KHz		-155	-150	dBc/Hz
		@100KHz		-158	-150	dBc/Hz
		@1MHz		-158	-150	dBc/Hz
Frequency Tuning	Frequency Adjustment Method		Voltage Regulation (Voltage Control)			—--
	Voltage-Controlled Voltage Input (VC)		0～2.0～4.0			VDC
	Frequency Adjustment Range	VC=4.0V	+0.5	+0.7		ppm	Frequency deviation at @VC=2.0V
		VC=2.0V	-0.1		+0.1	ppm	@Frequency deviation of nominal frequency
		VC=0V		-0.7	-0.5	ppm	Frequency deviation at @VC=2.0V
	Slope		Positive			——-
	Linearity				10	%
	Voltage-Controlled Input Impedance		100			KΩ
	Noise of Voltage-Controlled Voltage(RMS)				30	uV
	Reference Voltage Output (Vref)		3.8	4	4.2	VDC	Iout ≤ 1mA can be left floating
Ambient Temperature	Operating Temperature Range		-40		70	℃
Ambient Temperature	Storage Temperature Range		-60		105	℃