Datasheet

STM32F103xx Electrical characteristics
43/84
Table 19. High-speed external (HSE) user clock characteristics
Symbol Parameter Conditions Min Typ Max Unit
f
HSE_ext
User external clock source
frequency
(1)
1. Value based on design simulation and/or technology characteristics. It is not tested in production.
825MHz
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
(1)
16
ns
t
r(HSE)
t
f(HSE)
OSC_IN rise or fall time
(1)
5
I
L
OSC_IN Input leakage
current
V
SS
≤V
IN
≤V
DD
±1 µA