Rainbow Electronics NUC140 - Manual (Page 68)

NUC140 Series DATA SHEET
Publication Release Date: May 31, 2010
- 68 - 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
V
IH
Input high (driven) 2.0 V
V
IL
Input low 0.8 V
V
DI
Differential input sensitivity |PADP-PADM| 0.2 V
V
CM
Differential
common-mode range
Includes V
DI
range 0.8 2.5 V
V
SE
Single-ended receiver threshold 0.8 2.0 V
Receiver hysteresis 200 m V
V
OL
Output low (driven) 0 0.3 V
V
OH
Output high (driven) 2.8 3.6 V
V
CRS
Output signal cross voltage 1.3 2.0 V
R
PU
Pull-up resistor 1.425 1.575 kΩ
R
PD
Pull-down resistor 14.25 15.75 kΩ
V
TRM
Termination Voltage for
upstream port pull up (R
PU
)
3.0 3.6 V
Z
DRV
Driver output resistance Steady state drive* 10 Ω
C
IN
Transceiver capacitance Pin to GND 20 pF
*Driver output resistance doesn’t include series resistor resistance.