Datasheet

LTC2856-1/LTC2856-2
LTC2857-1/LTC2857-2
LTC2858-1/LTC2858-2
8
285678ff
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A
B
V
CM
±V
AB
/2
±V
AB
/2
RO
C
L
285678 F06a
RECEIVER
t
PLHR
t
PHLR
90%
0
t
SKEWR
= t
PLHR
– t
PHLR
90%
1/2 V
CC
1/2 V
CC
t
RR
t
FR
10%
285678 F06b
10%
V
AB
V
CC
V
O
0
–V
AB
RO
A-B
Figure 6. Receiver Propagation Delay Measurements
A
B
0V OR V
CC
V
CC
OR 0V
RO
RE
C
L
DI = 0V OR V
CC
R
L
V
CC
OR
GND
285678 F07a
RECEIVER
t
ZLR
,
t
ZLSR
t
ZHR
,
t
ZHSR
t
HZR
t
LZR
1/2 V
CC
1/2 V
CC
1/2 V
CC
RE
RO
RO
V
CC
V
CC
V
OL
V
O
V
OH
0V
0V
0.5V
0.5V
285678 F05b
Figure 7. Receiver Enable/Disable Time Measurements
FuncTion Tables
LTC2856-1, LTC2856-2
LOGIC INPUTS
MODE A, B RO
DE RE
0 0 Receive R
IN
Driven
0 1 Shutdown R
IN
High-Z
1 0 Transceive Driven Driven
1 1 Transmit Driven High-Z
LTC2858-1, LTC2858-2
LOGIC INPUTS
MODE A, B Y, Z RO
DE RE
0 0 Receive R
IN
High-Z Driven
0 1 Shutdown R
IN
High-Z High-Z
1 0 Transceive R
IN
Driven Driven
1 1 Transmit R
IN
Driven High-Z
TesT circuiTs