MAX14781E_14 Datasheet, PDF (3/19 Pages) Maxim Integrated Products – Half-Duplex RS-485 Transceiver with Polarity Correction

MAX14781E
Half-Duplex RS-485 Transceiver
with Polarity Correction
Electrical Characteristics (continued)
(V_CC = 5V ± 10%, T_A = -40°C to +85°C, unless otherwise noted. Typical values are at V_CC = 5V and T_A = +25°C.)(Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP MAX UNITS
Driver Short-Circuit Foldback
Ouptut Current
I_OSDF
Driver is in short
circuit (Note 5)
Output low, (V_CC
-1V) ≤ V_{OUT ≤} 12V
Output high, -7V ≤
20
V_{OUT ≤} +1V
mA
-20
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
T_SHDN
T_HYST
Temperature rising
+175
°C
15
°C
Input Current (A and B)
I_A,B
DE = low, V_CC = ^VIN ^{= 12V}
0V or 5V
V_IN = -7V
-100
125
μA
RECEIVER
Receiver Differential Threshold
Voltages
V_TH1
-7V ≤ V_CM ≤
+12V
Normal/
noninverted mode
-200
-125 -50
mV
V_TH2
Inverted mode
+50
+125 +200
Receiver Input Hysteresis
ΔV_TH
V_A + V_B = 0V
15
mV
Receiver Output Voltage High
V_OH
RE = low, I_SOURCE = -1mA
V_CC - 0.6
V
Receiver Output Voltage Low
V_OL
RE = low, I_SINK = 1mA
0.4
V
Receiver Three-State Output
Current
I_OZR
RE = high, 0V ≤ V_RO ≤ V_CC
-1
+1
μA
Receiver Output Short Circuit
Current
I_OSR
0V ≤ V_RO ≤ V_CC
-110
+110
mA
POLARITY DETECTION
Maximum A-B Voltage
Difference for Inverted Polarity
V_PI
(V_A - V_B) for at least t_PM
-200
mV
Minimum A-B Voltage
Difference for Normal Polarity
V_PN
(V_A - V_B) for at least t_PM
+200
mV
Polarity Monitoring Interval
SUPPLY CURRENT
Supply Current
Shutdown Supply Current
PROTECTION
t_PM
I_CC
I_SHDN
(Note 6)
DE = high, RE = low, no load
DE = low, RE = high
Human Body Model
8.3
20
ms
1.2
1.8
mA
10
μA
±25
ESD Protection (A and B Pins)
IEC 61000-4-2 Air Gap Discharge to
GND
±15
kV
IEC 61000-4-2- Contact Discharge
to GND
±9
ESD Protection (All Other Pins)
Human Body Model
±2
kV
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