Datasheet

DocID17659 Rev 9 69/131
STM32L151x6/8/B, STM32L152x6/8/B Electrical characteristics
105
Figure 15. High-speed external clock source AC timing diagram
Table 26. High-speed external user clock characteristics
(1)
1. Guaranteed by design, not tested in production.
Symbol Parameter Conditions Min Typ Max Unit
f
HSE_ext
User external clock source
frequency
CSS is on or
PLL is used
1
832MHz
CSS is off, PLL
not used
0
V
HSEH
OSC_IN input pin high level voltage
-
0.7V
DD
-V
DD
V
V
HSEL
OSC_IN input pin low level voltage V
SS
-0.3V
DD
t
w(HSE)
t
w(HSE)
OSC_IN high or low time 12 - -
ns
t
r(HSE)
t
f(HSE)
OSC_IN rise or fall time - - 20
C
in(HSE)
OSC_IN input capacitance - - 2.6 - pF
DuCy
(HSE)
Duty cycle - 45 - 55 %
I
L
OSC_IN Input leakage current
V
SS
≤ V
IN
≤ V
D
D
--±1µA
ai18232
OSC _I N
EXTERNAL
STM32Lxx
CLOCK SOURCE
V
HSEH
t
f(HSE)
t
W(HSE)
I
L
90%
10%
T
HSE
t
t
r(HSE)
t
W(HSE)
f
HSE_ext
V
HSEL