SN65HVD1785_10 Datasheet, PDF (4/24 Pages) Texas Instruments – Fault-Protected RS-485 Transceivers With Extended Common-Mode Range

SN65HVD1785, SN65HVD1786
SN65HVD1787, SN65HVD1791
SN65HVD1792, SN65HVD1793
SLLS872H – JANUARY 2008 – REVISED FEBRUARY 2010
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ELECTRICAL CHARACTERISTICS
over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
|V_OD|
Δ|V_OD|
Driver differential output voltage magnitude
RS-485 with
common-mode load,
V_CC > 4.75 V, see
Figure 1
T_A ≤ 85°C
T_A ≤ 105°C
R_L = 54 Ω, 4.75 V ≤ V_CC ≤ 5.25 V
R_L = 100 Ω, 4.75 V ≤ V_CC ≤ 5.25 V
Change in magnitude of driver differential output
voltage
R_L = 54 Ω
V_OC(SS) Steady-state common-mode output voltage
ΔV_OC
Change in differential driver output
common-mode voltage
V_OC(PP)
Peak-to-peak driver common-mode output
voltage
Center of two 27-Ω load resistors, See
Figure 2
C_OD
Differential output capacitance
V_IT+
Positive-going receiver differential input voltage
threshold
V_IT–
Negative-going receiver differential input
voltage threshold
V_CM = –20 V to 25 V
V_HYS
Receiver differential input voltage threshold
hysteresis (V_IT+ – V_IT–)
V_OH
Receiver high-level output voltage
I_OH = –8 mA
I_OH = –400 mA
V_OL
Receiver low-level output voltage
I_OL = 8 mA
I_I
Driver input, driver enable, and receiver enable
input current
T_A ≤ 85°C
T_A ≤ 105°C
I_OZ
Receiver output high-impedance current
I_OS
Driver short-circuit output current
I_I
Bus input current (disabled driver)
V_O = 0 V or V_CC, RE at V_CC
V_CC = 4.5 to 5.5 V or
V_CC = 0 V, DE at 0 V
Driver and receiver
enabled
85, 86, ^VI ^{= 12 V}
91, 92 _{VI = –7 V}
87, 93 ^{VI = 12 V}
V_I = –7 V
DE = V_CC,
RE = GND,
no load
I_CC
Supply current (quiescent)
Driver enabled,
receiver disabled
Driver disabled,
receiver enabled
DE = V_CC,
RE = V_CC,
no load
DE = GND,
RE = GND,
no load
Driver and receiver
disabled
DE = GND,
D = open
RE = V_CC,
no load
Supply current (dynamic)
See TYPICAL CHARACTERISTICS section
MIN
1.5
1.4
1.5
2
–0.2
1
–100
–200
30
2.4
4
–100
–1
–250
–100
–400
TYP MAX UNIT
2
2.5
0
V_CC/2
0
V
0.2 V
3V
100 mV
500
23
–100
mV
pF
–10 mV
–150
mV
50
mV
V_CC
– 0.3
V
0.2 0.4
V
0.2 0.5
100 mA
1 mA
250 mA
75 125
–40
mA
500
4
6
3
5 mA
2
4
0.5
5 mA
4
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