LTC2873H Ver la hoja de datos (PDF) - Analog Devices
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LTC2873H Datasheet PDF : 32 Pages
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LTC2873
TEST CIRCUITS
DI
A/DO
RL
CL
DI
A/DO
½VL
3V
–3V
tPHLD232
tPLHD232
tF
0V
½VL
tR
0V
VL
3V
–3V
0V
VOHD
VOLD
SLEW RATE = 6V
tF OR tR
tSKEWD232 = |tPHLD232 – tPLHD232|
2873 F09
Figure 9. RS232 Driver Timing and Slew Rate Measurements
0V OR VL
SHDN
A/DO
RL
CL
SHDN
A/DO
A/DO
½VL
tZHSD232
5V
tZLSD232
–5V
Figure 10. RS232 Driver Enable and Disable Times
½VL
tHZSD232
tLZSD232
0.5V
0.5V
VL
0V
VOHD
0V
0V
VOLD
2873 F10
B/RI
RO
CL
+3V
B/RI
1.5V
1.5V
tPHLR232
tPLHR232
–3V
90%
90%
VL
RO
10%
½VL
½VL 10%
0V
tFR232
tRR232
tSKEWR232 = |tPLHR232 – tPHLR232|
2873 F11
Figure 11. RS232 Receiver Timing Measurements
–3V OR +3V
SHDN
RO
RL
CL
GND
OR VL
SHDN
RO
RO
½VL
tZHR232,
tZHSR232
½VL
tZLR232,
tZLSR232
½VL
Figure 12. RS232 Receiver Enable and Disable Times
½VL
tHZR232,
tHZSR232
0.5V
tLZR232,
tLZSR232
0.5V
VL
0V
VOHR
0V
VL
VOLR
2873 F12
14
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