Datasheet

ST26C31
4/10
ELECTRICAL CHARACTERISTICS (V
CC
=5V± 10%, unless otherwise specified, See Note 1)
Note 1: Unless otherwise specified, min/max limits apply across the recommended operating temperature range. All typical are given for V
CC
=5VandT
a
= 25°C
Note 2: See EIA Specification RS422 for exact test conditions.
Note 3: Measured per pin input. All other input at VCC or GND.
Note 4: This is the current sourced when a high output is shorted to ground. Only one output at time should be shorted.
SWITCHING CHARACTERISTICS (V
CC
=5V± 10%, t
r
=t
f
≤6ns, See Note 1)
Note 1: Unless otherwise specified, min/max limits apply across the recommended operating temperature range. All typical are given for
V
CC
=5V and T
a
= 25°C
Note 2: Skewis defined as the difference in propagation delays between complementary outputs at the 50% point.
Note 3: Output disable time is the delay from the control input being switched to the output transistors tuming off. The actual disable times
are less than indicated due to the delay added by RC time constant of the load.
Note 4: CPD determines the no load dynamic power consumption, P
D
=C
PD
V
2
CC
f=I
CC
V
CC
, and the no load dynamic current consumption,
P
D
=C
PD
V
CC
f+I
CC
Symbol Parameter Test Conditions
Value
Unit
Min. Typ. Max.
V
IH
High Level Input Voltage 2 V
V
IL
Low Level Input Voltage 0.8 V
V
OH
High Level Output Voltage V
IN
=V
IH
or V
IL
,I
OUT
= -20mA 2.5 3.4 V
V
OL
Low Level Output Voltage V
IN
=V
IH
or V
IL
,I
OUT
= +20mA 0.3 0.5 V
V
T
Differential Output Voltage R
L
=100Ω (Note 2) 2 3.1 V
V
T
-V
T
Difference in Differential
Output Voltage
R
L
=100Ω (Note 2) 0.4 V
V
OS
Common Mode Output
Voltage
R
L
=100Ω (Note 2) 1.8 3 V
V
OS
-
V
OS
Difference in Common
Mode Output Voltage
R
L
=100Ω (Note 2) 0.4 V
I
IN
Input Current V
IN
=V
CC
, GND, V
IH
or V
IL
±1 µA
I
CC
Quiescent Supply Current
(Note 2)
I
OUT
=0µA V
IN
=V
CC
or GND 200 500 µA
V
IN
= 2.4 or 0.5 V (Note 3) 0.8 2 mA
I
OZ
3-STATE Output Leakage
Current
V
OUT
=V
CC
or GND
ENABLE = V
IL
ENABLE =V
IH
±0.5 ±5 µA
I
SC
Output Short Circuit Current V
IN
=V
CC
or GND (Notes 2, 4) -30 -150 mA
I
OFF
Power Off Output Leakage
Current (Note 2)
V
CC
=0V V
OUT
= 6 V 100 µA
V
OUT
= -0.25 V -100 µA
Symbol Parameter Test Conditions
Value
Unit
Min. Typ. Max.
t
PLH
t
PHL
Propagation Delay Input to
Output
S1 Open 2 6 11 ns
Skew (Note 2) S1 Open 0.5 2 ns
t
TLH
t
THL
Differential Output Rise and
Fall Times
S1 Open 6 10 ns
t
PZH
Output Enable Time S1 Closed 11 19 ns
t
PZL
Output Enable Time S1 Closed 13 21 ns
t
PHZ
Output Disable Time
(Note 3)
S1 Closed 5 9 ns
t
PLZ
Output Disable Time
(Note 3)
S1 Closed 7 11 ns
C
PD
Power Dissipation
Capacitance (Note 4)
50 pF
C
IN
Input Capacitance 6 pF