Rainbow-electronics NUC120 Manual do Utilizador descarregar pdf (Página 65)

NUC120 Series DATA SHEET

Publication Release Date: May 31, 2010

- 65 - Revision V1.02

7.4.8 Specification of USB PHY

7.4.8.1 USB DC Electrical Characteristics

SYMBOL PARAMETER CONDITIONS MIN. TYP MAX. UNIT

Input high (driven) 2.0 V

Input low 0.8 V

Differential input sensitivity |PADP-PADM| 0.2 V

Differential

common-mode range

Includes V

range 0.8 2.5 V

Single-ended receiver threshold 0.8 2.0 V

Receiver hysteresis 200

Output low (driven) 0 0.3

Output high (driven) 2.8 3.6

CRS

Output signal cross voltage 1.3 2.0

Pull-up resistor 1.425 1.575

kΩ

Pull-down resistor 14.25 15.75

kΩ

TRM

Termination Voltage for

upstream port pull up (R

)

3.0 3.6

DRV

Driver output resistance Steady state drive* 10

Transceiver capacitance Pin to GND 20

*Driver output resistance doesn’t include series resistor resistance.

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Rainbow-electronics NUC120 Manual do Utilizador Página 65