Datasheet

Table Of Contents
Electrical characteristics STM32WLE5J8/JB/JC
106/135 DS13105 Rev 4
5.3.17 NRST pin characteristics
The NRST pin input driver uses the CMOS technology. It is connected to a permanent
pull-up resistor, R
PU
.
Unless otherwise specified, the parameters given in the table below are derived from tests
performed under the ambient temperature and supply voltage conditions summarized in
Table 25: General operating conditions.
0b01
Fmax
Maximum
frequency
C = 50 pF, 2.7 V V
DD
3.6 V - 25
MHz
C = 50 pF, 1.8 V V
DD
2.7 V - 10
C = 10 pF, 2.7 V V
DD
3.6 V - 50
C = 10 pF, 1.8 V V
DD
2.7 V - 15
Tr/Tf
Output rise and
fall time
C = 50 pF, 2.7 V V
DD
3.6 V - 9
ns
C = 50 pF, 1.8 V V
DD
2.7 V - 16
C = 10 pF, 2.7 V V
DD
3.6 V - 4.5
C = 10 pF, 1.8 V V
DD
2.7 V - 9
0b10
Fmax
Maximum
frequency
C = 50 pF, 2.7 V V
DD
3.6 V - 50
MHz
C = 50 pF, 1.8 V V
DD
2.7 V - 25
C = 10 pF, 2.7 V V
DD
3.6 V - 100
(4)
C = 10 pF, 1.8 V V
DD
2.7 V - 37.5
Tr/Tf
Output rise and
fall time
C = 50 pF, 2.7 V V
DD
3.6 V - 5.8
ns
C = 50 pF, 1.8 V V
DD
2.7 V - 11
C = 10 pF, 2.7 V V
DD
3.6 V - 2.5
C = 10 pF, 1.8 V V
DD
2.7 V - 5
0b11
Fmax
Maximum
frequency
C = 30 pF, 2.7 V V
DD
3.6 V - 120
(4)
MHz
C = 30 pF, 1.8 V V
DD
2.7 V - 50
C = 10 pF, 2.7 V V
DD
3.6 V - 180
(4)
C = 10 pF, 1.8 V V
DD
2.7 V - 75
(4)
Tr/Tf
Output rise and
fall time
C = 30 pF, 2.7 V V
DD
3.6 V - 3.3
ns
C = 30 pF, 1.8 V V
DD
2.7 V - 6
C = 10 pF, 2.7 V V
DD
3.6 V - 1.7
C = 10 pF, 1.8 V V
DD
2.7 V - 3.3
1. The maximum frequency is defined with (T
r
+ T
f
) 2/3 T, and duty cycle comprised between 45 and 55 %.
2. The fall and rise time are defined, respectively, between 90 and 10 %, and between 10 and 90 % of the output waveform.
3. OSPEED0[1:0] in GPIOA_OSPEEDR, GPIOB_OSPEEDR and GPIOC_OSPEEDR. OSPEED3[1:0] in GPIOH_OSPEEDR
4. This value represents the I/O capability but the maximum system frequency is limited to 48 MHz.
Table 69. I/O AC characteristics
(1)(2)
(continued)
OSPEEDx[1:0]
(3)
Symbol Parameter Conditions Min Max Unit