10MHz SMD2522 Clock Mudule

1. Frequency: 10MHz (±0.01 ppb accuracy).
2. Holdover: < 1us timing error / 24h.
3. Phase Noise: -155 dBc/Hz (@10kHz).
4. Power: 3.3V (400mA steady state).
5. Interface: 1PPS In/Out + UART.

A high-precision 10MHz GNSS-disciplined clock module with 1PPS synchronization and 3.3V supply.

Specification

	Parameter		Min.	Typ.	Max.	Unit	Condition	Note
Frequency Stability (Pin 4)	Frequency			10		MHz
	Frequency Accuracy		-100		+100	ppb	Free run, @25℃, after 15mins power on ref to nominal frequency
	Frequency Accuracy		-0.01		+0.01	ppb	The average value within 24 hours after deep locked to GNSS
	Reflow shift		-100		+100	ppb	place for 72 hours after reflow,and power up for 30 minutes	Internal frequency components must be allowed to rest for 72 hours following high-temperature processing.
	Short Term Stability				0.01	ppb/s	After power on 1hour@Free run
	Temperature Stability		-1		+1	ppb	-10℃～+65℃ refer to 25℃
	Holdover Capability		-1		+1	us	ΔT=2℃,locking to 1PPS from GNSS for 7days, measure the holdover for 24 hours, with the ΔT less than 1℃/h.
	Local 1PPS precision		-30		+30	ns	Refer to 1PPS from GNSS for 24 hours
	Aging	Per day	-0.5		+0.5	ppb	After 30days of operation @Free run
	Aging	the first year	-50		+50	ppb	After 30days of operation @Free run
Supply Voltage/Current（pin3）	Voltage Supply		3.135	3.3	3.465	V
	Operating Current				1200	mA	During warm up
	Operating Current				400	mA	At steady state operation @25℃
RF Output （pin4）	LVCMOS	Load		15		pF
		High Level (VoH)	2.7			V
		Low Level (VoL)			0.4	V
		Rise/Fall Time			5	ns
		Duty Cycle	45		55	%
RF Phase Noise（pin4）	Phase Noise				-85	dBc/Hz	@1Hz
					-118		@10Hz
					-140		@100Hz
					-150		@1kHz
					-155		@10KHz
1pps Output（pin2）	LVCMOS	Output Level(VOH)	2.7			V
		Output Level(VOL)			0.4	V
		Pulse width		100		ms
1pps Reference Input（pin1）	LVCMOS	Input Level(VOH)	2.7		3.4	V
		Input Level(VOL)	0		0.4	V
		Pulse width	0.01		500	ms
RXD（pin5）	LVCMOS	Input Level(VOH)	2.7			V
RXD（pin5）	LVCMOS	Input Level(VOL)			0.4	V
TXD（pin6）	LVCMOS	Input Level(VOH)	2.7			V
TXD（pin6）	LVCMOS	Input Level(VOL)			0.4	V

Dimension

gps disciplined ocxo.png

Pin Definition
Number	PIN	Function
1	Reference 1pps In	1 PPS Reference Input
2	1pps Out	Local 1PPS Output
3	VS	Supply voltage: 3.3 V
4	RF out	Frequency Output: 10 MHz
5	RXD	Serial ReceptionSerial Reception	115200-N-8-1
6	TXD	Serial Transmission
7	GND	GND