Name: TR8900
Brand: TKD Science and Technology Co., Ltd.

The TKD TR8900 series is a low-power real-time clock module with an integrated 32.768 kHz crystal, providing stable time and calendar functions with minimal power. It is suited to smart meters, IoT nodes, portable instruments and battery-powered systems.

Specification of TR8900

Technical Specifications	Symbol	Condition		Min.	Typ.	Max.	Unit
Frequency	f	Ta=+25℃, VDD=1.3V~5.5V		-	32.768	-	kHz
Operating Temperature	Ta	-		-40	25	125	℃
Frequency Stability	△f/f	Ta=-40~+85℃, VDD=3.0V		-5	(*1)	5	ppm
		Ta=-85~+105℃, VDD=3.0V		-8	(*2)	8	ppm
		Ta=-105~+125℃, VDD=3.0V		-20	(*3)	20	ppm
Start-up Time	Tsta	Ta=+25℃, VDD=1.3~5.5V		-	-	1.0	s
Start-up Time	Tsta	Ta=-40~+125℃, VDD=1.3~5.5V		-	-	3.0	s
Supply Current	IDD1	fSCL=0Hz, /INT=VDD FOE=GND, VDD=VBAT FOUT: Output Off	VDD=5V	-	0.72	1.5	μA
Supply Current	IDD2	Temperature Compensation Interval: 2.0s VDET3 Voltage Detection Time: 2ms	VDD=3V	-	0.7	1.4	μA