STM32L151CBT6 Datasheet, PDF (89/121 Pages) STMicroelectronics – Ultra-low-power 32-bit MCU ARM-based Cortex-M3, 128KB Flash, 16KB SRAM, 4KB EEPROM, LCD, USB, ADC, DAC

STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Table 51. USB DC electrical characteristics
Symbol
Parameter
Conditions
Min.⁽¹⁾ Max.⁽¹⁾ Unit
Input levels
V_DD
V_DI(3)
V_CM(3)
V_SE(3)
USB operating voltage⁽²⁾
Differential input sensitivity
I(USB_DP, USB_DM)
Differential common mode range Includes V_DI range
Single ended receiver threshold
3.0
3.6
V
0.2
0.8
2.5
V
1.3
2.0
Output levels
V_OL(4)
V_OH(4)
Static output level low
Static output level high
R_L of 1.5 kΩ to 3.6 V⁽⁵⁾
R_L of 15 kΩ to V_SS(5)
2.8
0.3
V
3.6
1. All the voltages are measured from the local ground potential.
2. To be compliant with the USB 2.0 full speed electrical specification, the USB_DP (D+) pin should be pulled
up with a 1.5 kΩ resistor to a 3.0-to-3.6 V voltage range.
3. Guaranteed by characterization, not tested in production.
4. Tested in production.
5. R_L is the load connected on the USB drivers.
Figure 24. USB timings: definition of data signal rise and fall time
Differen tial
Data L ines
VCR _S
Crossover
points
VS _S
tf
tr
ai14137
Table 52.
USB: full speed electrical characteristics
Driver characteristics⁽¹⁾
Symbol
Parameter
Conditions
Min
Max
Unit
t_r
Rise time⁽²⁾
t_f
Fall Time⁽²⁾
C_L = 50 pF
4
C_L = 50 pF
4
20
ns
20
ns
t_rfm Rise/ fall time matching
t_r/t_f
90
110
%
V_CRS Output signal crossover voltage
1.3
2.0
V
1. Guaranteed by design, not tested in production.
2. Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB
Specification - Chapter 7 (version 2.0).
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