SIT1630

Ultra-Low Power, Ultra-Small 32.768 kHz or 16.384 kHz Oscillator

Features



<20 ppm initial tolerance



<100 ppm stability over -40°C to +85°C



Small SMD package: 2.0 x 1.2 mm (2012)

[1]



SOT23-5 package option for industrial and

automotive applications



Ultra-low power: 1.0 µA typ



Vdd supply range: 1.5V to 3.63V



Wide operating temperature range options



Internal filtering eliminates external Vdd bypass capacitors



Pb-free, RoHS and REACH compliant

Applications



Industrial timekeeping



Industrial battery management



Multi-drop 32 kHz clock distribution



Bluetooth modules



WiFi modules



RTC Reference Clock

Note:

1. For the smallest 32 kHz XO in CSP (1.2mm

Table 1. Electrical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Condition

Frequency and Stability

Output Frequency

Fout

32.768 or

16.384

kHz

Frequency Stability

Initial Tolerance

[2]

F_init

20

ppm

Frequency Stability Over Temperature

[3]

F_stab

75

ppm

100

150

25°C Aging

-1

1

ppm

1st Year

Supply Voltage and Current Consumption

Operating Supply Voltage

Vdd

1.5

3.63

V

Operating Current

Idd

1.0

μA

1.3

1.4

2.80

Power-Supply Ramp

t_Vdd

Ramp

100

ms

Over temperature, 0 to 90% Vdd

Start-up Time at Power-up

T_start

180

300

ms

-40°C

≤ T

450

-40°C

≤ T

500 + 1

period

T

Operating Temperature Range

Commercial Temperature

T_opn

-10

70

°C

Temp

code “C” in part number ordering

Industrial Temperature

-40

85

Temp

code “I” in part number ordering

Extended IndustrialTemperature

-40

105

Temp

code “E” in part number ordering.

Extended Cold Industrial Temperature

-55

85

Temp Code “D” in part number ordering.

Automotive Temperature Range

-55

105

Contact Factory for Availability

Output Rise/Fall Time

tr, tf

100

200

ns

10-90%, 15 pF load, Vdd = 1.5V to 3.63V

10-90% (Vdd), 5 pF load, Vdd

≥ 1.62V

Output Clock Duty Cycle

DC

48

52

%

Output Voltage High

VOH

90%

V

Vdd: 1.5V

Output Voltage Low

VOL

10%

V

Vdd: 1.5V

Maximum Output Drive

50

pF

Period Jitter

T_jitt

35

ns

RMS

Cycles = 10,000, TA = 25°C

Notes:

2. Measured peak-to-

peak. Tested with Agilent 53132A frequency counter. Due to the low operating frequency, the gate time must be ≥100 ms to ensure an

accurate frequency measurement.

3. Measured peak-to-peak. Inclusive of Initial Tolerance at 25°C, and variations over operating temperature, rated power supply voltage and load.

Rev 1.3

October 12, 2017

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