DS78LS120 Datasheet, PDF (2/9 Pages) National Semiconductor (TI) – Dual Differential Line Receiver (Noise Filtering and Fail-Safe)

Absolute Maximum Ratings (Note 2)
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Supply Voltage
Input Voltage
Strobe Voltage
Output Sink Current
Storage Temperature Range
Maximum Power Dissipation at 25˚C
(Note 1)
7V
±25V
7V
50 mA
−65˚C to +150˚C
1433 mV
Lead Temperature (Soldering, 4 sec)
260˚C
Operating Conditions
Min
Supply Voltage (V_CC)
4.5
Temperature (T_A)
−55
Common-Mode Voltage (V_CM) −15
Max
5.5
+125
+15
Units
V
˚C
V
Electrical Characteristics (Notes 3, 4)
Symbol
Parameter
V_TH
Differential Threshold Voltage
V_TL
Differential Threshold Voltage
V_TH
Differential Threshold Voltage
V_TL
with Fail-Safe Offset = 5V
R_IN
Input Resistance
R_T
Line Termination Resistance
R_O
Offset Control Resistance
I_IND
Data Input Current (Unterminated)
V_THB
Input Balance
(Note 6)
V_OH
Logical “1” Output Voltage
V_OL
Logical “0” Output Voltage
I_CC
Power Supply Current
I_{IN (1)}
I_{IN (0)}
V_IH
V_IL
I_OS
Logical “1” Strobe Input Current
Logical “0” Strobe Input Current
Logical “1” Strobe Input Voltage
Logical “0” Strobe Input Voltage
Output Short-Circuit Current
Conditions
I_OUT = −400 µA, V_OUT ≥ 2.5V
I_OUT = 4 mA, V_OUT ≤ 0.5V
−7V ≤ V_CM ≤ 7V
−15 ≤ V_CM ≤15V
−7V ≤ V_CM ≤7V
−15V ≤ V_CM ≤
15V
I_OUT = −400 µA, V_OUT ≥ 2.5V
−7V ≤ V_CM ≤ 7V
I_OUT = 4 mA, V_OUT ≤ 0.5V
−7V ≤ V_CM ≤ 7V
−15V ≤ V_CM ≤ 15V, 0V ≤ V_CC ≤ 7V
T_A = 25˚C
T_A = 25˚C
V_CM = 10V
V_CM = 0V
0V ≤ V_CC ≤ 7V
V_CM = −10V
I_OUT = −400 µA, V_OUT ≥ 2.5V,
−7V ≤ V_CM 7V
R_S = 500Ω
I_OUT = 4 mA, V_OUT ≤ 0.5V,
−7V ≤ V_CM ≤ 7V
R_S = 500Ω
I_OUT = −400 µA, V_DIFF = 1V, V_CC = 4.5V
I_OUT = 4 mA, V_DIFF = −1V, V_CC = 4.5V
V_CC = 5.5V
V_CM = 15V
V_DIFF = −0.5V, (Both Receivers) V_CM = −15V
V_STROBE = 5.5V, V_DIFF = 3V
V_STROBE = 0V, V_DIFF = −3V
V_OL ≤ 0.5, I_OUT = 4mA
V_OH ≥ 2.5V, I_OUT, = −400 µA
V_OUT = 0V, V_CC = 5.5V, V_STROBE = 0V,(Note 5)
Min Typ Max Units
0.06 0.2 V
0.06 0.3 V
−0.08 −0.2 V
−0.08 −0.3 V
0.47 0.7 V
−0.2 −0.42
V
4
5
kΩ
100 180 300 Ω
42 56 70 kΩ
2 3.1 mA
0 −0.5 mA
−2 −3.1 mA
0.1 0.4 V
−0.1 −0.4 V
2.5 3
V
0.35 0.5 V
10 16 mA
10 16 mA
1 100 µA
−290 −400 µA
2.0 1.12
V
1.12 0.8 V
−30 −100 −170 mA
Note 1: Derate cavity package 9.6 mW/˚C above 25˚C.
Note 2: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. Except for “Operating Temperature Range”
they are not meant to imply that the devices should be operated at these limits. The table of “Electrical Characteristics” provides conditions for actual device
operation.
Note 3: Unless otherwise specified min/max limits apply across the −55˚C to +125˚C temperature range for the DS78LS120. All typical values are for T_A = 25˚C,
V_CC = 5V and V_CM = 0V.
Note 4: All currents into device pins shown as positive, out of device pins as negative, all voltages referenced to ground unless otherwise noted. All values shown
as max or min on absolute value basis.
Note 5: Only one output at a time should be shorted.
Note 6: Refer to EIA-RS422 for exact conditions.
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