21
CL-GigE Connections
Differential and Single-Ended Input/Output Specifications
The input and output specifications vary, depending on how the
Differential Type
and
I/O Level
switches are set, as listed in the following tables.
Warning:
To avoid damage to the CL-GigE and connected equipment (or reduced lifetime of the
Differential Type
switch), ensure you observe the following precautions:
• Set the
Differential Type
and
I/O Level
switches BEFORE you connect equipment and apply power to
the CL-GigE.
• Do not set the
Differential Type
switch to
HVTTL
when you are using LVDS equipment.
• Do not change the
Differential Type
switch setting while the CL-GigE is powered or while devices are
connected.
Table 8: GPIO Differential Input Specifications
Specifications
Input type
Differential
+/-24 V,
+/-30 V,
RS-422
Differential
LVDS, RS-422
with 100 Ohm
termination
Differential
used as single-
ended HVTTL/
HVCMOS
Differential used
as single-ended
LVCMOS
Differential
used as
single-ended
TTL
Differential input
termination
10 K and
50 pF in
series
100 Ohm
N/A
N/A
N/A
Single-ended
input
termination
Negative (-)
input
47 K to 1/3 of I/O level
(1.1 V for 3.3 V I/O level or 1.7 V
for 5 V I/O level)
Do not connect to negative (-) input
Positive (+)
input
100 K to CL-GigE GND
Input thresholds
Low
-200 mV (minimum), differential
-50 mV (typical), differential
0 mV (maximum), differential
<6.5 V
<0.9 V
<1.5 V
High
+200 mV (maximum), differential
+50 mV (typical), differential
0 mV (minimum), differential
>9.5 V
>1.3 V
>1.9 V
Hysteresis
150 mV (typical)
Maximum delay
100 nsec
65 nsec
100 nsec
100 nsec
100 nsec
Minimum
operation voltage
-30 V
Maximum
operation voltage
+30 V
