STM32F103C8T7 datasheet(75/105 Pages) STMICROELECTRONICS

75 / 105 page

STM32F103x8, STM32F103xB

Electrical characteristics

Doc ID 13587 Rev 15

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Figure 36.

USB timings: definition of data signal rise and fall time

5.3.17

CAN (controller area network) interface

Refer to Section 5.3.12: I/O current injection characteristics for more details on the

input/output alternate function characteristics (CAN_TX and CAN_RX).

Table 44.

USB DC electrical characteristics

Symbol

Parameter

Conditions

Min.(1)

All the voltages are measured from the local ground potential.

Max.(1)

Unit

Input levels

VDD

USB operating voltage(2)

To be compliant with the USB 2.0 full-speed electrical specification, the USBDP (D+) pin should be pulled

up with a 1.5 k

Ω resistor to a 3.0-to-3.6 V voltage range.

3.0(3)

The STM32F103xx USB functionality is ensured down to 2.7 V but not the full USB electrical

characteristics which are degraded in the 2.7-to-3.0 V VDD voltage range.

3.6

VDI

(4)

Guaranteed by design, not tested in production.

Differential input sensitivity

I(USBDP, USBDM)

0.2

VCM

(4)

Differential common mode range

Includes VDI range

0.8

2.5

VSE

(4)

Single ended receiver threshold

1.3

2.0

Output levels

VOL

Static output level low

RL of 1.5 kΩ to 3.6 V

(5)

RL is the load connected on the USB drivers

0.3

VOH

Static output level high

RL of 15 kΩ to VSS

(5)

2.8

3.6

Table 45.

USB: Full-speed electrical characteristics(1)

Guaranteed by design, not tested in production.

Symbol

Parameter

Conditions

Min

Max

Unit

Driver characteristics

Rise time(2)

Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB

Specification - Chapter 7 (version 2.0).

CL = 50 pF

420

Fall time(2)

CL = 50 pF

trfm

Rise/ fall time matching

tr/tf

110

VCRS

Output signal crossover voltage

1.3

2.0

ai14137

Differen tial

data lines

VSS

VCRS

Crossover

points

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