SN75LBC187_08 Datasheet, PDF (4/12 Pages) Texas Instruments – MULTICHANNEL EIA-232 DRIVER/RECEIVER WITH CHARGE PUMP

SN75LBC187
MULTICHANNEL EIA-232 DRIVER/RECEIVER
WITH CHARGE PUMP
SLLS130C – SEPTEMBER 1991 – REVISED MAY 1995
switching characteristics over recommended operating conditions, T_A = 25°C (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN MAX UNIT
tPLH Propagation delay time, low- to high-level output
Receiver
RL = 5 kΩ,
See Figure 1
Driver
RL = 3 kΩ,
See Figure 2
CL = 50 pF,
CL = 1200 pF,
1.25 µs
1.25 µs
tPHL Propagation delay time, high- to low-level output
Receiver
RL = 5 kΩ,
See Figure 1
Driver
RL = 3 kΩ,
See Figure 2
CL = 50 pF,
CL = 1200 pF,
1.25 µs
1.25 µs
tr
Rise time, driver output
tf
Fall time, driver output
RL = 3 kΩ,
VO = – 3 V to 3 V,
RL = 3 kΩ,
VO = – 3.3 V to 3.3 V,
RL = 3 kΩ,
VO = 3 V to – 3 V
RL = 3 kΩ,
VO = 3.3 V to – 3.3 V
CL = 50 pF,
See Note 2
CL = 2500 pF,
See Note 3
CL = 50 pF,
CL = 2500 pF,
200
ns
1.5 µs
200
ns
1.5 µs
NOTES: 2. The 200 ns for the output to change from – 3 V to 3 V (or vice versa) corresponds to the 30 V/µs maximum slew rate of EIA/TIA-232-E,
EIA/TIA-562, and ITU Recommendation V.28.
3. The more stringent requirement for transition times comes from the EIA/TIA-562, which requires the rise and fall times to be
measured from 3.3 V.
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