DS14185
SNLS093C –APRIL 1999–REVISED APRIL 2013
www.ti.com
Units
Switching Characteristics(1)
TA = 25°C
Symbol
Parameter
Conditions
Min
Typ(2)
Max
DRIVER CHARACTERISTICS
tPHL
tPLH
tr, tf
Propagation Delay High to Low
RL = 3 kΩ, CL = 50 pF
(Figure 3 Figure 4)
60
240
50
350
350
ns
ns
ns
Propagation Delay Low to High
Output Slew Rate(3)
RECEIVER CHARACTERISTICS
tPHL
tPLH
tr
Propagation Delay High to Low
RL = 1.5 kΩ, CL = 15 pF
(includes fixture plus probe),
(Figure 5 Figure 6)
150
240
87
350
350
175
100
ns
ns
ns
ns
Propagation Delay Low to High
Rise Time
tf
Fall Time
40
(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: VCC = +5.0V, V+ = +12.0V, V− = −12V, TA = +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 VCC 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), tr = tf < 10 ns, VIH = 3V, VIL = 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/(tr or tf)
Generator characteristics for receiver input: f = 64 kHz (128 kbits/sec), tr = tf = 200 ns, VIH = 3V, VIL = −3V, duty cycle
= 50%.
Figure 5. Receiver Propagation Delay and Transition Time Test Circuit
4
Submit Documentation Feedback
Copyright © 1999–2013, Texas Instruments Incorporated
Product Folder Links: DS14185
TI [ TEXAS INSTRUMENTS ]
