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External Trigger Parameters
External Trigger Schematic
Absolute Maximum
Maximum Input Voltage
Low Value: -0.5 Volts
High Value: +5.5 Volts
The input is protected by an input protection diode on the ground
side.
The input voltage can be below ground provided it is current limited
below the value shown on the next line of this table.
Maximum Input Current
Low Value: -6 Milliamperes
Input protection diode current. The limiting factor on current is the
dissipation in the 1K, 0402 resistor (not the gate diode limit).
Parameter Values
Input Resistance to Ground
Low Value: 9.7 K
Nominal Value: 10.0 K
High Value: 10.3 K
Pull down resistor loading.
Maximum Input Low Voltage Logical Low Level High Value: 0.8 Volts Value does not include harness drops or margin for noise.
Input High Voltage Threshold Low Value: 2.6 Volts Value does not include harness drops or margin for noise.
Fairchild
NC7SZ125L6X
Tri-State Buffer
CMOS Input Level
10K
Resistor
1K
Resistor
+3.3V Scanner
Scanner
Controller
Please see External
Trigger Parameters
for voltage levels
Pin 14
3310 Scanner
Host/Register
Data Connector
Pin 6
Customer Device
Power Link
(Not on all cables)
+3.3V to +5.0V
Controller
Standard Trigger Input Connection
Fairchild
NC7SZ125L6X
Tri-State Buffer
CMOS Input Level
10K
Resistor
1K
Resistor
+3.3V Scanner
Scanner
Controller
Please see External
Trigger Parameters
for voltage levels
Pin 14
3310 Scanner
Host/Register
Data Connector
Pin 6
Customer Device
Power Link
(Not on all cables)
Customer
VCC
Controller
Example of Trigger Input Connection Using an Opto-Isolator
+5.2V
AC
Adapter
N.C.
+5.2V Scanner Power
+5.2V
Push-pull
logic gate
or similar
type driver.
Push-pull
logic gate
or similar
type driver.
Opto-Isolator
Scanner Cable with
External Trigger and
Lamp Signals
Scanner Cable with
External Trigger and
Lamp Signals
Note: All connections for power and ground and communication not
shown for clarity. Additional details of the user connector can be
found in the 3310 Vuquest User’s Guide.
Green
Black
Green
Black
Customer
Ground
Customer
Ground
Customer
Ground
+5.2V
AC
Adapter
+5.2V Scanner Power
Pin 10
Pin 10
+5.2V
GND
GND
User Connector (15 pin
HD-22 pin size).
User Connector (15 pin
HD-22 pin size).
Note: All connections for power and ground and communication not
shown for clarity. Additional details of the user connector can be
found in the 3310 Vuquest User’s Guide.