Datasheet
SN65HVD50-SN65HVD55
SLLS666E –SEPTEMBER 2005–REVISED OCTOBER 2009
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DRIVER ELECTRICAL CHARACTERISTICS
over recommended operating conditions unless otherwise noted
TYP
PARAMETER TEST CONDITIONS MIN MAX UNIT
(1)
V
I(K)
Input clamp voltage I
I
= –18 mA –1.5
I
O
= 0 4 V
CC
R
L
= 54 Ω, See Figure 1 (RS-485) 1.7 2.6
|V
OD(SS)
| Steady-state differential output voltage
R
L
= 100 Ω, See Figure 1 (RS-422) 2.4 3.2
V
test
= –7 V to 12 V, See Figure 2 1.6
Change in magnitude of steady-state
Δ|V
OD(SS)
| R
L
= 54 Ω, See Figure 1 and Figure 2 –0.2 0.2
differential output voltage between states
Differential Output Voltage overshoot R
L
= 54 Ω, C
L
= 50 pF, See Figure 5
V
V
OD(RING)
10%
(2)
and undershoot See Figure 3 for definition
HVD50, HVD53 0.5
Peak-to-peak
V
OC(PP)
common-mode HVD51, HVD54 See Figure 4 0.4
output voltage
HVD52, HVD55 0.4
Steady-state common-mode
V
OC(SS)
2.2 3.3
output voltage
See Figure 4
Change in steady-state common-mode output
ΔV
OC(SS)
–0.1 0.1
voltage
V
CC
= 0 V, V
Z
or V
Y
= 12 V,
90
Other input at 0 V
HVD50, HVD51,
HVD52
V
CC
= 0 V, V
Z
or V
Y
= –7 V,
–10
Other input at 0 V
High-impedance state
V
CC
= 5 V or 0 V,
I
Z(Z)
or I
Y(Z)
μA
output current
DE = 0 V 90
V
Z
or V
Y
= 12 V
HVD53, HVD54, Other input
HVD55 at 0 V
V
CC
= 5 V or 0 V,
DE = 0 V –10
V
Z
or V
Y
= –7 V
V
Z
or V
Y
= –7 V –250 250
Other input
I
Z(S)
or I
Y(S)
Short-circuit output current
(3)
mA
at 0 V
V
Z
or V
Y
= 12 V –250 250
I
I
Input current D, DE 0 100 μA
V
OD
= 0.4 sin (4E6πt) + 0.5 V,
C
(OD)
Differential output capacitance 16 pF
DE at 0 V
(1) All typical values are at 25°C and with a 5-V supply.
(2) 10% of the peak-to-peak differential output voltage swing, per TIA/EIA-485
(3) Under some conditions of short-circuit to negative voltages, output currents exceeding the ANSI TIA/EIA-485-A maximum current of 250
mA may occur. Continuous exposure may affect device reliability.
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