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LTC2802 Datasheet(PDF) 14 Page - Analog Devices

Part # LTC2802
Description  Single-Bus RS485/RS232 Multiprotocol Transceiver with Switchable Termination
PDF  32 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTC2802 Datasheet(HTML) 14 Page - Analog Devices

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LTC2873
14
REV B
For more information www.analog.com
Figure 9. RS232 Driver Timing and Slew Rate Measurements
Figure 10. RS232 Driver Enable and Disable Times
TEST CIRCUITS
2873 F09
DI
A/DO
CL
RL
tPHLD232
tPLHD232
tSKEWD232 = |tPHLD232 – tPLHD232|
tF
tR
DI
A/DO
SLEW RATE =
6V
tF OR tR
3V
–3V
0V
VOLD
VL
½VL
½VL
0V
3V
–3V
0V
VOHD
2873 F10
0V OR VL
SHDN
A/DO
CL
RL
tHZSD232
tLZSD232
SHDN
A/DO
A/DO
tZHSD232
tZLSD232
5V
–5V
0V
0V
0V
VOHD
VL
½VL
½VL
VOLD
0.5V
0.5V
Figure 11. RS232 Receiver Timing Measurements
Figure 12. RS232 Receiver Enable and Disable Times
2873 F11
tPHLR232
tSKEWR232 = |tPLHR232 – tPHLR232|
tPLHR232
tRR232
90%
1.5V
1.5V
½VL
10%
tFR232
90%
–3V
VL
+3V
½VL
10%
0V
RO
RO
B/RI
B/RI
CL
2873 F12
–3V OR +3V
SHDN
RO
GND
OR VL
CL
RL
tHZR232,
tHZSR232
tLZR232,
tLZSR232
SHDN
RO
RO
tZHR232,
tZHSR232
tZLR232,
½VL
½VL
0V
0V
VL
VOHR
VL
½VL
½VL
VOLR
tZLSR232
0.5V
0.5V



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