Datasheet


  


SGLS211A − OCTOBER 2003 − REVISED MAY 2008
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
DRIVER SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN MAX UNIT
V
IK
Input clamp voltage I
I
= −18 mA −1.5 V
V
O
Output voltage I
O
= 0 0 6 V
| V
OD1
| Differential output voltage I
O
= 0 1.5 6 V
V
OD3
Differential output voltage V
test
= −7 V to 12 V, See Figure 2, See Note 3 1.1 V
| V
OD2
| Differential output voltage R
L
= 54 Ω, See Figure 1, See Note 3 1.1 V
∆| V
OD
|
Change in magnitude of differential
output voltage
†
± 0.2 V
V
OC
Common-mode output voltage
R
L
= 54 Ω or 100 Ω,
See Figure 1
3
V
V
OC
Common-mode output voltage R
L
= 54 Ω or 100 Ω, See Figure 1
−1
V
∆| V
OC
|
Change in magnitude of
common-mode output voltage
†
± 0.2 V
I
O
Output current
Output disabled,
V
O
= 12 V 1
mA
I
O
Output current
Output disabled,
See Note 4
V
O
= −7 V −0.8
mA
I
IH
High-level input current V
I
= 2.4 V −100 µA
I
IL
Low-level input current V
I
= 0.4 V −100 µA
V
O
= −7 V −250
I
OS
Short-circuit output current
V
O
= 0 −150
mA
I
OS
Short-circuit output current
V
O
= V
CC
250
mA
V
O
= 12 V
250
I
CC
Supply current
V
I
= 0 or V
CC
,
No load
Receiver disabled and driver
enabled
1.75
mA
I
CC
Supply current
No load
Receiver and driver disabled 0.25
mA
†
∆ | V
OD
| and ∆ | V
OC
| are the changes in magnitude of V
OD
and V
OC
, respectively, that occur when the input changes from a high level to a
low level.
NOTES: 3. This device meets the ANSI Standard RS-485 V
OD
requirements above 0°C only.
4. This applies for both power on and off; refer to ANSI Standard RS-485 for exact conditions.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature
PARAMETER TEST CONDITIONS MIN TYP
†
MAX UNIT
t
d(OD)
Differential output delay time
R
L
= 54 Ω
C
L
= 50 pF,
8 31 ns
t
t(OD)
Differential output transition time
R
L
= 54 Ω,
See Figure 3
C
L
= 50 pF,
12 ns
t
sk(p)
Pulse skew (| t
d(ODH)
− t
d(ODL)
|)
See Figure 3
6 ns
t
PZH
Output enable time to high level R
L
= 110 Ω, See Figure 4 65 ns
t
PZL
Output enable time to low level R
L
= 110 Ω, See Figure 5 65 ns
t
PHZ
Output disable time from high level R
L
= 110 Ω, See Figure 4 105 ns
t
PLZ
Output disable time from low level R
L
= 110 Ω, See Figure 5 105 ns
†
All typical values are at V
CC
= 5 V, T
A
= 25°C.