CRYSTAL CHARACTERISTICS |
Crystal frequency |
Typical with specified load capacitors |
|
16.384 |
|
MHz |
Crystal frequency tolerance |
Parameter of crystal; TA = 27°C |
–20 |
|
20 |
ppm |
Crystal motional inductance |
Parameter of crystal |
23 |
33 |
43 |
mH |
Crystal series resistance |
At fundamental frequency |
|
|
90 |
Ω |
Oscillator drive power |
The power dissipated in the crystal during oscillator operation |
|
15 |
120 |
µW |
Load capacitance |
Corresponding to crystal frequency, including parasitic capacitances |
9 |
10 |
11 |
pF |
Crystal shunt capacitance |
Parameter of crystal |
0.5 |
|
4 |
pF |
Oscillator frequency drift |
TJ from –40°C to 125°C, VCC1 from 3.15 V to 5.25 V
Excluding crystal tolerance |
–50 |
|
50 |
ppm |
Oscillator startup time |
Time from VCC1 > 3.15 V until 32-kHz clock output is available from crystal oscillator |
|
|
10 |
ms |
32-kHz RC OSCILLATOR |
Output frequency low-level output voltage |
|
|
32768 |
|
Hz |
Output frequency accuracy |
After trimming, TA = 27°C |
–10% |
0 |
10% |
|
Cycle jitter (RMS) |
|
|
|
10% |
|
Output duty cycle |
|
40% |
50% |
60% |
|
Settling time |
|
|
|
150 |
µs |
Active current consumption |
|
|
4 |
8 |
µA |
Power-down current |
|
|
|
30 |
nA |
CLK32KGO OUTPUT BUFFER |
Logic output external load |
|
5 |
35 |
50 |
pF |
Rise and fall time |
CL = 35 pF, 10% to 90% |
5 |
50 |
100 |
ns |
Duty cycle |
Logic output signal |
40% |
50% |
60% |
|
CLK32KGO1V8 OUTPUT BUFFER |
Settling time |
|
|
25 |
50 |
µs |
Active current consumption |
|
5 |
7 |
10 |
µA |
Power-down current |
|
|
|
30 |
nA |
Duty cycle degradation contribution |
|
–2% |
|
2% |
|
External output load |
|
5 |
10 |
50 |
pF |
Output delay time |
Output load = 10 pF |
|
15 |
30 |
ns |
Output rise/fall time |
Output load = 10 pF |
7.5 |
|
20 |
ns |
SYNCCLKOUT OUTPUT BUFFER |
Logic output external load |
|
5 |
35 |
50 |
pF |
Rise and fall time |
CL = 35 pF, 10% to 90% |
5 |
50 |
100 |
ns |
Duty cycle |
Logic output signal |
40% |
50% |
60% |
|