Datasheet
DS14185
SNLS093C –APRIL 1999–REVISED APRIL 2013
www.ti.com
Switching Characteristics
(1)
T
A
= 25°C
Symbol Parameter Conditions Min Typ
(2)
Max Units
DRIVER CHARACTERISTICS
t
PHL
Propagation Delay High to Low R
L
= 3 kΩ, C
L
= 50 pF 60 350 ns
(Figure 3 Figure 4)
t
PLH
Propagation Delay Low to High 240 350 ns
t
r
, t
f
Output Slew Rate
(3)
50 ns
RECEIVER CHARACTERISTICS
t
PHL
Propagation Delay High to Low R
L
= 1.5 kΩ, C
L
= 15 pF 150 350 ns
(includes fixture plus probe),
t
PLH
Propagation Delay Low to High 240 350 ns
(Figure 5 Figure 6)
t
r
Rise Time 87 175 ns
t
f
Fall Time 40 100 ns
(1) Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground
unless otherwise specified. For current, minimum and maximum values are specified as an absolute value and the sign is used to
indicate direction. For voltage logic levels, the more positive value is designated as maximum. For example, if −6V is a maximum, the
typical value (−6.8V) is more negative.
(2) All typicals are given for: V
CC
= +5.0V, V
+
= +12.0V, V
−
= −12V, T
A
= +25°C.
(3) Refer to typical curves. Driver output slew rate is measured from the +3.0V to the −3.0V level on the output waveform. Inputs not under
test are connected to V
CC
or GND. Slew rate is determined by load capacitance. To comply with a 30 V/μs maximum slew rate, a
minimum load capacitance of 390 pF is recommended.
Parameter Measurement Information
Generator characteristics for driver input: f = 64 kHz (128 kbits/sec), t
r
= t
f
< 10 ns, V
IH
= 3V, V
IL
= 0V, duty cycle =
50%.
Figure 3. Driver Propagation Delay and Transition Time Test Circuit
Figure 4. Driver Propagation Delay and Transition Time Waveforms Slew Rate (SR) = 6V/(t
r
or t
f
)
Generator characteristics for receiver input: f = 64 kHz (128 kbits/sec), t
r
= t
f
= 200 ns, V
IH
= 3V, V
IL
= −3V, duty cycle
= 50%.
Figure 5. Receiver Propagation Delay and Transition Time Test Circuit
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