External Clock Source Characteristics - STMicroelectronics STM32L151CB Manual

STM32L151xx, STM32L152xx
4. Data based on a differential I
conversion of V
5. Including supply current of internal reference voltage.
6.3.5

External clock source characteristics

High-speed external user clock generated from an external source
Table 22.
Symbol
f
HSE_ext
V
HSEH
V
HSEL
t
w(HSE)
t
w(HSE)
t
r(HSE)
t
f(HSE)
C
in(HSE)
DuCy
(HSE)
I
L
1. Guaranteed by design, not tested in production.
measurement between DAC in reset configuration and continuous DAC
DD
/2. DAC is in buffered mode, output is left floating.
DD
High-speed external user clock characteristics
Parameter
User external clock source
frequency
OSC_IN input pin high level voltage
OSC_IN input pin low level voltage
OSC_IN high or low time
OSC_IN rise or fall time
OSC_IN input capacitance
Duty cycle
OSC_IN Input leakage current
Doc ID 17659 Rev 6
Electrical characteristics
(1)
Conditions Min
1
0.7V
DD
V
SS
12
45
≤ V ≤ V
V
SS IN DD
Typ Max Unit
8 32 MHz
V
DD
V
0.3V
DD
ns
20
2.6 pF
55 %
±1 µA
59/109