VTI Instruments
22
EMX-75XX Index
TTL/LV Emulation Sourcing Current Typical connection
FPGA
GND_S
Input Detect with
Hysteresis
DATAx.y
DIO conn
PXIe conn
R1A
330
Ω
R1B
499
Ω
R1C
100 k
Ω
3.7 V
LV Emulation
5 V
TTL Emulation
VCLAMP
Channel
Control
Over-Current
Detect
R
INPUT
201 k
User
Voltage
ESD
Int. Voltage
(3.3, 5, 12,
24V)
R
USER
GND_S
GND_S
F
IGURE
2-5:
TTL/LV
E
MULATION
S
OURCING
C
URRENT
T
YPICAL CONNECTION
Sinking Current Typical connection
User
Voltage
FPGA
GND_S
Input Detect with
Hysteresis
DATAx.y
DIO conn
PXIe conn
R1A
330
Ω
R1B
499
Ω
R1C
100 k
Ω
3.7 V
LV Emulation
5 V
TTL Emulation
VCLAMP
Channel
Control
Over-Current
Detect
R
INPUT
201 k
User
Voltage
ESD
Int. Voltage
(3.3, 5, 12,
24V)
R
USER
GND_S
GND_S
F
IGURE
2-6:
S
INKING
C
URRENT
T
YPICAL CONNECTION