SN65HVD20_101 Datasheet, PDF (13/30 Pages) Texas Instruments – Extended Common-Mode RS-485 Transceivers

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SN65HVD20, SN65HVD21
SN65HVD22, SN65HVD23, SN65HVD24
SLLS552E – DECEMBER 2002 – REVISED MAY 2010
PARAMETER MEASUREMENT INFORMATION (continued)
200 mV
40 mV
VID 200 mV
1.5 V
Bus Data Valid Region
Bus Data
Transition Region
Bus Data Valid Region
VOH
tp(SET)
tp(RESET)
R
1.5 V
VOL
Figure 15. Receiver Active Failsafe Definitions and Waveforms
100 Ω
Pulse Generator,
15 ms Duration,
1% Duty Cycle
VTEST
0V
15 ms
1.5 ms
V _TEST
Figure 16. Test Circuit and Waveforms, Transient Overvoltage Test
PIN ASSIGNMENTS
LOGIC DIAGRAM
D or P PACKAGE
(TOP VIEW)
R
1
RE
2
DE
3
D
4
8
V_CC
7B
6A
5 GND
R1
RE ²
3
DE
D4
6A
7
B
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