82P33731_16 Datasheet, PDF (45/68 Pages) IDEA.lnc. – Synchronous Ethernet

82P33731 Datasheet
AMI input
470 nF
IN1 OUT8_POS
470 pF
Turns ratio
3:1
R load
AMI output
2 nF
AMI input
IN2 OUT8_NEG
470 nF
GND
For a transformer with a turns ratio of 1:1, a 3:1 ratio potential divider Rload must be used
to achieve the required 1 V pk-pk voltage level for the positive and negative pulses.
Figure 23. AMI Input / Output Port Line Termination (Recommended)
Table 20: AMI Input / Output Port Electrical Characteristics
Parameter
Description
Min
t_PW
Input Pulse Width
t_R/F
Input Pulse Rise/Fall Time
V_ID
Input Differential Voltage Amplitude
0.73
V_OH
Output Voltage High, Output Current = -4 mA
2.4
V_OL
Output Voltage Low, Output Current = 4 mA
R_TEST
Nominal Test Load Impedance
V_MARK
Peak ‘Mark’ Amplitude after Transformer
0.9
V_SPACE
Peak “Space” Amplitude after Transformer
Typ
Max
7.8
0.5
VDD+0.165
0.4
110
1.0
1.1
0
0.1
8.3.1.3 Over-Voltage Protection
The device may require over-voltage protection on AMI input ports
according to ITU Recommendation K.41.
8.3.2
CMOS INPUT / OUTPUT PORT
Table 21: CMOS Input Port Electrical Characteristics
Parameter
V_IH
V_IL
I_IN
Description
Input Voltage High
Input Voltage Low
Input Current
Min
Typ
Max
Unit
2
V
0.8
V
±10
A
Unit
S
S
V
V
V

V
V
Test Condition
Table 22: CMOS Input Port with Internal Pull-Up Resistor Electrical Characteristics
Parameter
Description
Min
V_IH
Input Voltage High
2
V_IL
Input Voltage Low
P_U
Pull-Up Resistor
P_U
Pull-Up Resistor (RSTB pin)
I_IN
Input Current
Typ
Max
0.8
50
25
±150
Unit
Notes
V
V
K
Except RSTB pin
K
A
©2016 Integrated Device Technology, Inc.
45
Revision 5, December 8, 2016