LTC2851 LINER [Linear Technology], LTC2851 Datasheet - Page 6

• Manufacturer Part Number: LTC2851
• Description: 20Mbps RS485 Transceivers
• Manufacturer: LINER [Linear Technology]

LTC2859/LTC2861
TesT circuiTs
6
DI = 0V OR V
0V OR V
V
V
CC
CM
±V
±V
OR 0V
RO
AB
AB
CC
/2
/2
TE
CC
A
B
RECEIVER
RECEIVER
A
B
A
B
RE
RECEIVER
Figure 7. Termination Resistance and Timing Measurements
RO
+
–
+
–
Figure 6. Receiver Enable/Disable Time Measurements
Figure 5. Receiver Propagation Delay Measurements
V
V
AB
B
RO
C
R
L
TERM
R
L
=
C
V
L
I
AB
A
V
OR
GND
CC
A-B
RO
TE
I
RO
RO
A
RE
V
–V
0V
CC
V
V
V
V
V
V
0V
AB
AB
CC
0V
0V
OH
CC
CC
OL
V
V
O
O
1/2 V
CC
10%
0V
90%
90%
t
t
t
ZHR
ZHSR
SKEWR =
t
t
ZLR
ZLSR
1/2 V
,
,
t
PLHR
t
t
RTEN
RR
CC
t
1/2 V
1/2 V
PLHR
CC
CC
–
1/2 V
t
PHLR
CC
1/2 V
CC
t
t
LZR
HZR
90%
10%
t
PHLR
10%
t
FR
t
0.5V
0.5V
RTZ
2859/61 F07
2859/61 F05
2859/61 F06
285961fc