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14
QUARTZ-ONYX
Hardware Manual
Table 11.
RS485 Receiver Characteristics
Reciever Parameter
Conditions
Min
Typ
Max
Units
Differential Input Threshold
-7V ≤ VCM ≤ 12V
-0.2
0.2
Volts
Input Hysteresis
VCM = 0V
0.02
Volts
Input Resistance
-7V ≤ VCM ≤ 12V
12
kΩ
IMPORTANT:
Minimum and maximum values are over the operating temperature range of
-30 to +75°C.
LAN characteristics
4x 10/100/1000 Mbps Ethernet RJ45 Ports. Three ports are for LAN only. The fourth
port may be software configured as a LAN or a WAN port.
Although the maximum speed if any individual port is 1 Gbps, the switching matrix
supporting the 4 ports is capable of 2 Gbps wire speed.
DI1 and DI2 are voltage level triggered inputs. DI1 is internally pulled down to 0 V using
a 94K Ω resistor. DI2 is internally pulled up to 5 V using a 4700 Ω resistor, but not
designed to source any current if not used as an input. It is acceptable to leave these
inputs disconnected if not used.
GPIO Characteristics
Table 12.
Input Pin Characteristics
Parameter
Conditions
Min
Typ
Max
Units
Absolute maximum input voltage
25°C Ambient
-10.0
5.0
Volts
Input threshold low
25°C Ambient
0.5
Volts
Input threshold high
25°C Ambient
3.0
Volts
Input resistance DI1
25°C Ambient
16.45
23.5
30.55
k Ω
Input resistance DI2
25°C Ambient
3.65
3.92
4.07
k Ω
IMPORTANT:
Operation outside of the maximum operating voltage range will cause
damage to the router.
