Electrical Characteristics (T = 25°C unless otherwise specified)
A
Current Limiting Resistor Calculations
R
(Non-Invert) = V
- V - V
DD1 DF OL1
1
OUTPUT
I
F
CMOS CMOS
@ 5 V @ 10 V
R
(Invert) = V
- V
- V
DF
INPUT
R1 (V)
74XX 74LXX 74SXX 74LSXX 74HXX
1
DD1
OH1
I
F
R2 (V) R2 (V) R2 (V) R2 (V) R2 (V)
R2 (V)
R2 (V)
R = V
- = V
(@ I - I )
2
DD2
OLX L 2
CMOS NON-INV. 2000 1000 2200
@ 5 V
750
1000 1000
1000
560
I
L
INV.
510
CMOS NON-INV. 5100
@ 10 V
INV.
4700
Where:
74XX NON-INV. 2200
INV. 180
74LXX NON-INV. 1800
INV. 100
74SXX NON-INV. 2000
INV. 360
74LSXX NON-INV. 2000
INV. 180
74HXX NON-INV. 2000
INV. 180
V
V
V
V
V
- Input Supply Voltage
DD1
DD2
- Output Supply Voltage
- Diode Forward Voltage
DF
- Logic “0” Voltage of Driver
OL1
OH1
- Logic “1” Voltage of Driver
I - Diode Forward Current
F
V
- Saturation Voltage of
Output Transistor
OLX
I - Load Current Through
L
Resistor R2
Fig. 1 Resistor Values for Logic Interface
I - Input Current of Output Gate
2
VDD1
VDD2
VDD2
1
2
3
8
7
6
5
1
2
3
4
8
7
6
5
R2
R2
IN
OUT
IN
R1
OUT
R1
4
Fig. 2 Non-Inverting Logic Interface
Fig. 3 Inverting Logic Interface
6
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