MC75172B_06 Datasheet, PDF (2/13 Pages) ON Semiconductor – Quad EIA−485 Line Drivers with Three−State Outputs

MC75172B, MC75174B
RECOMMENDED OPERATING CONDITIONS
Characteristic
Power Supply Voltage
Input Voltage (All Inputs)
Output Voltage in 3−State Condition, or when V_CC = 0 V
Output Current (Normal data transmission)
Operating Ambient Temperature (see text)
EIA−485
EIA−422
2. All limits are not necessarily functional concurrently.
Symbol
V_CC
V_in
V_cm
I_O
T_A
Min Typ Max Unit
+4.75 +5.0 +5.25 Vdc
0
−
V_CC
Vdc
−7.0
−
+12
Vdc
−65
−
+65
mA
−
+85
°C
−40
0
ELECTRICAL CHARACTERISTICS (−40°C p T_A p 85°C, 4.75 V p V_CC p 5.25 V, unless otherwise noted.)
Characteristic
Symbol
Min Typ
Output Voltage
Single−Ended Voltage
I_O = 0
High @ I_O = −33 mA
Low @ I_O = +33 mA
Differential Voltage
Open Circuit (I_O = 0)
R_L = 54 W (Figure 1)
V_O
V_OH
V_OL
⎥ V_OD1 ⎜
⎥ V_OD2 ⎜
0
−
−
4.0
−
1.6
1.5
3.4
1.5
2.3
Change in Differential*, R_L = 54 W (Figure 1)
Differential Voltage, R_L = 100 W (Figure 1)
Change in Differential*, R_L = 100 W (Figure 1)
Differential Voltage, −7.0 V p V_cm p 12 V (Figure 2)
Change in Differential*, −7.0 V p V_cm p 12 V (Figure 2)
Offset Voltage, R_L = 54 W (Figure 1)
Change in Offset*, R_L = 54 W (Figure 1)
⎥ DV_OD2 ⎜
⎥ V_OD2A ⎜
⎥ DV_OD2A ⎜
⎥ V_OD3 ⎜
⎥ DV_OD3 ⎜
V_OS
⎥ DV_OS ⎜
−
5.0
−
2.2
−
5.0
1.5
−
−
5.0
−
2.9
−
5.0
Output Current (Each Output)
Power Off Leakage, V_CC = 0, −7.0 V p V_O p 12 V
Leakage in 3−State Mode, −7.0 V p V_O p 12 V
I_O(off)
I_OZ
−50
0
−50
0
Short Circuit Current to Ground
Short Circuit Current, −7.0 V p V_O p 12 V
I_OSR
I_OS
−150
−
−250
−
Inputs
Low Level Voltage (Pins 4 & 12, MC75174B only)
Low Level Voltage (All Other Pins)
High Level Voltage (All Inputs)
V_IL(A)
V_IL(B)
V_IH
0
−
0
−
2.0
−
Current @ V_in = 2.7 V (All Inputs)
Current @ V_in = 0.5 V (All Inputs)
I_IH
−
0.2
I_IL
−100 −15
Clamp Voltage (All Inputs, I_in = −18 mA)
V_IK
−1.5
−
Thermal Shutdown Junction Temperature
T_jts
−
+150
Power Supply Current (Outputs Open, V_CC = 5.25 V)
Outputs Enable
Outputs Disabled
I_CC
−
60
−
30
3. *V_in switched from 0.8 to 2.0 V. Typical values determined at 25°C ambient and 5.0 V supply.
Max
6.0
−
−
6.0
5.0
200
−
200
5.0
200
−
200
+50
+50
+150
+250
0.7
0.8
V_CC
20
−
−
−
70
40
Unit
Vdc
mVdc
Vdc
mVdc
Vdc
mVdc
Vdc
mVdc
mA
mA
Vdc
mA
Vdc
°C
mA
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