Chip Scale Atomic Clock CT45

The CT45 chip atomic clock is a miniature atomic clock based on the Coherent Population Trapping（CPT） principle and MEMS technology, which outputs an accurate and stable 10MHz standard frequency signal and 1PPS pulse signal. The installation size of CT45 chip atomic clock is compatible with SA.45s chip clock, and can work in time-frequency boards and modules. It has UART frequency calibration interface and external electrical tuning interface.

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Technical Specifications

Output Signal Feature
Serial	Item			Parameter
1	Output Frequency			10MHz (Optional for 16.384MHz,20MHz and 24.576MHz)
2	Wave Type			Square
3	Electrical Level			3.3V
4	Phase Noise (SSB)	10Hz		≤-80dBc/Hz
		100Hz		≤-113dBc/Hz
		1kHz		≤-125dBc/Hz
		10kHz		≤-135dBc/Hz
Output 1PPS feature
Serial	Item			Parameter
1	Amplitude			3.3V±0.2V
2	Pulse Width			＞1 μs
3	Rising Time			＜10 ns
Frequency Feature
Serial	Item			Parameter
1	Relative Error			≤±5.0E-11
2	Frequency Stability(Allan)		δy(1s)	≤3.0E-10
			δy(10s)	≤1.0E-10
			δy(100s)	≤3.0E-11
3	Drift (Power-on 1d)			≤3.0E-11/d
4	Temperature Feature(-10℃～+70℃)			≤1.0E-9
5	Power-on Feature		Lock Time	≤4 mins
6	Frequency Adjustment		Range	≥±2E-8
			Ratio	≤1E-12
7	Frequency Error (Tamed 2h)			≤±1.0E-12/d

Sync and Holdover Performance
Serial	Item		Parameter
1	1PPS Sync Error		≤50ns
2	Holdover (1d @ Tamed 1d)		≤5μs
Power and Consumption
Serial	Item		Parameter
1	Voltage		+3.2Vdc～+3.4Vdc
2	Start Consumption		≤200mW
3	Rated Consumption (Normal Temperature)		≤130mW
Status Indicator
Serial	Item		Parameter
1	Status	Lock	0V～0.4V
		Unlock	2.2V～3.4V
Physical Parameter
Serial	Item		Parameter
1	Weight		≤40g
Environment Feature
Serial	Item		Parameter
1	Working Temperature		-10℃～+70℃
2	Storage Temperature		-55℃～+85℃
3	Magnetism		≤2 Gauss
Reliability
Serial	Item		Parameter
1	MTBF		≥100000h