Datasheet
DS26C31M, DS26C31T
SNLS375B –JUNE 1998–REVISED APRIL 2013
www.ti.com
DC Electrical Characteristics
V
CC
= 5V ± 10% (unless otherwise specified)
(1)
Symbol Parameter Conditions Min Typ Max Units
V
IH
High Level Input Voltage 2.0 V
V
IL
Low Level Input Voltage 0.8 V
V
OH
High Level Output Voltage V
IN
= V
IH
or V
IL
, 2.5 3.4 V
I
OUT
= −20 mA
V
OL
Low Level Output Voltage V
IN
= V
IH
or V
IL
, 0.3 0.5 V
I
OUT
= 20 mA
V
T
Differential Output Voltage R
L
= 100Ω 2.0 3.1 V
See
(2)
|V
T
| − |V
T
| Difference In Differential Output R
L
= 100Ω 0.4 V
See
(2)
V
OS
Common Mode Output Voltage R
L
= 100Ω 1.8 3.0 V
See
(2)
|V
OS
− V
OS
| Difference In Common Mode R
L
= 100Ω 0.4 V
Output
See
(2)
I
IN
Input Current V
IN
= V
CC
, GND, V
IH
, or V
IL
±1.0 μA
I
CC
Quiescent Supply Current
(3)
DS26C31T V
IN
= V
CC
or GND 200 500 μA
I
OUT
= 0 μA V
IN
= 2.4V or 0.5V
(3)
0.8 2.0 mA
DS26C31M V
IN
= V
CC
or GND 200 500 μA
I
OUT
= 0 μA V
IN
= 2.4V or 0.5V
(3)
0.8 2.1 mA
I
OZ
TRI-STATE Output Leakage V
OUT
= V
CC
or GND
Current
ENABLE = V
IL
±0.5 ±5.0 μA
ENABLE = V
IH
I
SC
Output Short Circuit Current V
IN
= V
CC
or GND
(2)(4)
−30 −150 mA
I
OFF
Output Leakage Current Power DS26C31T V
OUT
= 6V 100 μA
Off
(2)
V
CC
= 0V V
OUT
= −0.25V −100 μA
DS26C31M V
OUT
= 6V 100 μA
V
CC
= 0V V
OUT
= 0V
(5)
−100 μA
(1) Unless otherwise specified, min/max limits apply across the recommended operating temperature range. All typicals are given for V
CC
=
5V and T
A
= 25°C.
(2) See EIA Specification RS-422 for exact test conditions.
(3) Measured per input. All other inputs at V
CC
or GND.
(4) This is the current sourced when a high output is shorted to ground. Only one output at a time should be shorted.
(5) The DS26C31M (−55°C to +125°C) is tested with V
OUT
between +6V and 0V while RS-422A condition is +6V and −0.25V.
Switching Characteristics
V
CC
= 5V ±10%, t
r
≤ 6 ns, t
f
≤ 6 ns (Figure 3, Figure 4, Figure 5, Figure 6)
(1)
Symbol Parameter Conditions Min Typ Max Units
DS26C31T CS26C31M
t
PLH
, t
PHL
Propagation Delays Input to Output S1 Open 2 6 11 14 ns
Skew
(2)
S1 Open 0.5 2.0 3.0 ns
t
TLH
, t
THL
Differential Output Rise And Fall S1 Open 6 10 14 ns
Times
t
PZH
Output Enable Time S1 Closed 11 19 22 ns
t
PZL
Output Enable Time S1 Closed 13 21 28 ns
(1) Unless otherwise specified, min/max limits apply across the recommended operating temperature range. All typicals are given for V
CC
=
5V and T
A
= 25°C.
(2) Skew is defined as the difference in propagation delays between complementary outputs at the 50% point.
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