Datasheet
SLLS447C − OCTOBER 2000 − REVISED AUGUST 2008
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions
MIN NOM MAX UNIT
Supply voltage, V
CC
4.75 5 5.25 V
Voltage at any bus terminal Y, Z −7 12 V
High-level input voltage, V
IH
A, G, G
2 V
CC
V
Low-level input voltage, V
IL
A, G, G
0 0.8
V
Output current −60 60 mA
Operating free-air temperature, T
A
SN75LBC172A 0 70
°C
Operating free-air temperature, T
A
SN65LBC172A −40 85
°C
electrical characteristics over recommended operating conditions
PARAMETER TEST CONDITIONS MIN TYP
†
MAX UNIT
V
IK
Input clamp voltage I
I
= −18 mA −1.5 −0.77 V
V
O
Open-circuit output voltage Y or Z, No load 0 V
CC
V
Steady-state differential output voltage
No load (open circuit) 3 V
CC
V
OD(SS)
Steady-state differential output voltage
‡
R
L
= 54 Ω, see Figure 1
1
1.6
2.5
V
V
OD(SS)
Steady-state differential output voltage
magnitude
‡
R
L
= 54 Ω, see Figure 1 1 1.6 2.5 V
V
OD(SS)
magnitude
‡
With common-mode loading, see Figure 2
1
1.6
2.5
V
magnitude
With common-mode loading, see Figure 2 1 1.6 2.5
∆V
OD(SS)
Change in steady-state differential output
voltage between logic states
See Figure 1 −0.1 0.1 V
V
OC(SS)
Steady-state common-mode output
voltage
See Figure 3 2 2.4 2.8 V
∆V
OC(SS)
Change in steady-state common-mode
output voltage between logic states
See Figure 3 −0.02 0.02 V
I
I
Input current A, G, G −50 50 µA
I
OS
Short-circuit output current
V
I
= 0 V
−200
200
mA
I
OS
Short-circuit output current
V
TEST
= −7 V to 12 V,
V
I
= V
CC
−20
0
200 mA
I
OZ
High-impedance-state output current
V
TEST
= −7 V to 12 V,
See Figure 7
G at 0 V, G at V
CC
−50 50
A
I
O(OFF)
Output current with power off
See Figure 7
V
CC
= 0 V −10 10
µA
I
CC
Supply current
V
I
= 0 V or V
CC,
All drivers enabled 23
mA
I
CC
Supply current
V
I
= 0 V or V
CC,
No load
All drivers disabled 1.5
mA
†
All typical values are at V
CC
= 5 V and 25°C.
‡
The minimum V
OD
may not fully comply with TIA/EIA-485-A at operating temperatures below 0°C. System designers should take the possibly
of lower output signal into account in determining the maximum signal transmission distance.