SMSC DS – USB97CFDC

Page 15

Rev. 12/15/2000

USB PARAMETERS

The following tables and diagrams were obtained from the USB specification

USB DC PARAMETERS

0.0

0.2

0.4

0.6

0.8

1.0

0.0

0.2 0.4

0.6

0.8 1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

2.6

2.8

3.0

3.2

Common Mode Input Voltage (volts)

FIGURE 6 - DIFFERENTIAL INPUT SENSITIVITY OVER ENTIRE COMMON MODE RANGE

Table 6 - DC Electrical Characteristics

PARAMETER

SYMBOL

CONDITIONS

(NOTE 1, 2)

MIN

TYP

MAX

UNIT

Supply Voltage

Powered (Host or Hub) Port

VBUS

4.4

5.25

V

Supply Current

Function

ICC

Note 4

100

mA

Un-configured Function (in)

ICCINIT

Note 5

100

uA

Suspend Device

ICCS

100

uA

Leakage Current

Hi-Z State Data Line

Leakage

ILO

0 V < VIN < 3.3

V

-10

10

uA

Input Levels

Differential Input Sensitivity

VDI

|(D+) - (D-)|,

and FIGURE 6

0.2

V

Differential Common Mode

Range

VCM

Includes VDI

range

0.8

2.5

V

Single Ended Receiver

Threshold

VSE

0.8

2.0

V

Output Levels

Static Output Low

VOL

RL of 1.5 K

Ω to

3.6 V

0.3 (3)

V

Static Output High

VOH

RL of 15 K

Ω to

GND

2.8

3.6 (3)

V

Capacitance

Transceiver Capacitance

CIN

Pin to GND

20

pF

Terminals

Bus Pull-up Resistor on

Root Port

RPU

(1.5 K

Ω +/- 5%)

1.425

1.575

k

Ω

Bus Pull-down Resistor on

Downstream Port

RPD

(15 K

Ω +/- 5%)

14.25

15.75

k

Ω

Note 1: All voltages are measured from the local ground potential, unless otherwise specified.

Note 2: All timing use a capacitive load (CL) to ground of 50pF, unless otherwise specified.

Note 3: This is relative to VUSBIN.

Note 4: This is dependent on block configuration set by software.

Note 5: When the internal ring oscillator and waiting for first setup packet.