ST75285 View Datasheet(PDF) - STMicroelectronics
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ST75285 Datasheet PDF : 13 Pages
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ST75285
DRIVER SWITCHING CHARACTERISTICS (VDD = 12V, VSS = -12V, VCC = 5V, TA = 25 °C)
Symbol
Parameter
Test Conditions
Min.
Value
Typ.
Max.
tPLH Propagation Delay Time, Low to High RL = 3 to 7 KΩ CL = 15 pF
Level Output
(See Figure 3, 4)
tPHL Propagation Delay Time, High to Low RL = 3 to 7 KΩ CL = 15 pF
Level Output
(See Figure 3, 4)
tTLH Transition Time Low to High Level
Output
RL = 3 to 7 KΩ CL = 15 pF
(See Figure 3, 4)
RL = 3 to 7 KΩ CL = 2500 pF
(Note 6, See Figure 3, 4)
tTHL Transition Time High to Low Level
Output
RL = 3 to 7 KΩ CL = 15 pF
(See Figure 3, 4)
RL = 3 to 7 KΩ CL = 2500 pF
(Note 6, See Figure 3, 4)
200 400
50
100
60
100
1.7
2.5
50
100
1.5
2.5
NOTE 6: Measured between -3V and 3V points of output waveform (EIA-232-E conditions), all unused inputs are tied.
Unit
ns
ns
ns
µs
ns
µs
RECEIVER ELECTRICAL CHARACTERISTICS OVER OPERATING CONDITIONS
Symbol
Parameter
Test Conditions
VT+
VT-
Vhys
VOH
Positive Going Threshold Voltage
Negative Going Threshold Voltage
Input Hysteresis (VT+ - VT-)
High Level Output Voltage
VOL Low Level Output Voltage
IIH High Level Input Current
IIL Low Level Input Current
IOS Short-Circuit Output Current
(See Figure 6)
TA = 25 °C (See Figure 6)
IOH = -0.5mA VIH = 0.75 V
Inputs Open
VI = 3 V IOL = 10 mA
VI = 25 V (See Figure 6)
VI = 3 V (See Figure 6)
VI = -25 V (See Figure 6)
VI = -3 V (See Figure 6)
VI = 0 V VO = 0 V
(See Figure 5)
All typical values are at TA = 25°C, VCC = 5V, VDD = 9V and VSS=-9V
Value
Unit
Min. Typ. Max.
2.2
2.4
V
0.75 0.97
V
0.5
V
2.6
4
5
V
2.6
0.2 0.45
V
3.6
8.3
mA
0.43
-3.6
-8.3 mA
-0.43
-3.4 -12 mA
RECEIVER SWITCHING CHARACTERISTICS (VDD = 12V, VSS = -12V, VCC = 5V TA = 25°C)
Symbol
Parameter
Test Conditions
tPLH Propagation Delay Time Low to High RL = 5 KΩ CL = 50 pF
Level Output
(See Figure 6)
tPHL Propagation Delay Time High to Low RL = 5 KΩ CL = 50 pF
Level Output
(See Figure 6)
tTLH Transition Time Low to High Level
Output
RL = 5 KΩ CL = 50 pF
(See Figure 6)
tTHL Transition Time High to Low Level
Output
RL = 5 KΩ CL = 50 pF
(See Figure 6)
Value
Unit
Min. Typ. Max.
200 500
ns
60
120
ns
200 525
ns
20
60
ns
5/13
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