Datasheet

SN65176B, SN75176B
DIFFERENTIAL BUS TRANSCEIVERS
SLLS101D – JULY 1985 – REVISED APRIL 2003
5
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 TYP
‡
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 3.6 6 V
|V
OD2
| Differential output voltage
R
L
= 100 Ω, See Figure 1
1/2 V
OD1
or 2
¶
V
OD2
g
R
L
= 54 Ω, See Figure 1 1.5 2.5 5
V
OD3
Differential output voltage See Note 5 1.5 5 V
∆|V
OD
|
Chan
g
e in ma
g
nitude
R
L
=54Ω or 100 Ω
See Figure 1
±02
V
∆|V
OD
|
gg
of differential output voltage
§
R
L
=
54
Ω
or
100
Ω
,
See
Figure
1
±0
.
2
V
V
OC
Common mode out
p
ut voltage
R
L
=54Ω 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
|
Chan
g
e in ma
g
nitude
R
L
=54Ω or 100 Ω
See Figure 1
±02
V
∆|V
OC
|
gg
of common-modeoutput voltage
§
R
L
=
54
Ω
or
100
Ω
,
See
Figure
1
±0
.
2
V
I
O
Out
p
ut current
Output disabled,
V
O
= 12 V 1
mA
I
O
Output
current
,
See Note 6
V
O
= –7 V –0.8
mA
I
IH
High-level input current V
I
= 2.4 V 20 µA
I
IL
Low-level input current V
I
= 0.4 V –400 µA
V
O
= –7V –250
I
OS
Short circuit out
p
ut 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
Su
pp
ly current (total
p
ackage)
No load
Outputs enabled 42 70
mA
I
CC
Supply
current
(total
package)
No
load
Outputs disabled 26 35
mA
†
The power-off measurement in ANSI Standard TIA/EIA-422-B applies to disabled outputs only and is not applied to combined inputs and outputs.
‡
All typical values are at V
CC
= 5 V and T
A
= 25°C.
§
∆|V
OD
| and ∆|V
OC
| are the changes in magnitude of V
OD
and V
OC
, respectively, that occur when the input is changed from a high level to a low
level.
¶
The minimum V
OD2
with a 100-Ω load is either 1/2 V
OD1
or 2 V, whichever is greater.
NOTES: 5. See ANSI Standard TIA/EIA-485-A, Figure 3.5, Test Termination Measurement 2.
6. This applies for both power on and off; refer to ANSI Standard TIA/EIA-485-A for exact conditions. The TIA/EIA-422-B limit does
not apply for a combined driver and receiver terminal.
switching characteristics, V
CC
= 5 V, R
L
= 110 Ω, T
A
= 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
d(OD)
Differential-output delay time R
L
= 54 Ω, See Figure 3 15 22 ns
t
t(OD)
Differential-output transition time R
L
= 54 Ω, See Figure 3 20 30 ns
t
PZH
Output enable time to high level See Figure 4 85 120 ns
t
PZL
Output enable time to low level See Figure 5 40 60 ns
t
PHZ
Output disable time from high level See Figure 4 150 250 ns
t
PLZ
Output disable time from low level See Figure 5 20 30 ns