Specifications

74 JN-DS-JN5148-001 1v9 © NXP Laboratories UK 2013
22.3.12 32kHz Crystal Oscillator
VDD = 2.0 to 3.6V, -40 to +85ºC
Parameter Min Typ Max Unit Notes
Current consumption of cell
and counter logic
1.5
µA
This is sensitive to the ESR
of the crystal,Vdd and total
capacitance at each pin
Start – up time 0.8 s Assuming xtal with ESR of
less than 40kohms and
CL= 9pF External caps =
15pF
(Vdd/2mV pk-pk) see
Appendix B
Input capacitance
1.4
pF
Bondpad and package
Transconductance
17
uA/V
External Capacitors
(CL=9pF)
15 pF Total external capacitance
needs to be 2*CL, allowing
for stray capacitance from
chip, package and PCB
Amplitude at Xout
Vdd-0.2
Vp-p
22.3.13 32MHz Crystal Oscillator
VDD = 2.0 to 3.6V, -40 to +85ºC
Parameter Min Typ Max Unit Notes
Current consumption
300
375
450
µA
Excluding bandgap ref.
Start – up time 0.84 ms Assuming xtal with ESR of
less than 40ohms and CL=
9pF External caps = 15pF
see Appendix B
Input capacitance 1.4 pF Bondpad and package
Transconductance
3.65
4.30
5.16
mA/V
DC voltages, XTALIN /
XTALOUT
390/425
425/465
470/520
mV
External Capacitors
(CL=9pF)
15 pF Total external capacitance
needs to be 2*CL, allowing
for stray capacitance from
chip, package and PCB
Amplitude detect threshold 320 mVp-p Threshold detection
accessible via API