Datasheet

LTM2881
11
2881ff
For more information www.linear.com/2881
TesT circuiTs
A
B
0V OR V
CC2
V
CC2
OR 0V
RO
RE
C
L
R
L
V
L
OR
GND
2881 F07a
RECEIVER
t
ZLR
t
ZHR
t
HZR
t
LZR
1/2 V
L
1/2 V
L
1/2 V
L
RE
RO
RO
V
L
V
L
V
OL
V
OH
0V
0V
0.5V
0.5V
2881 F07b
Figure 7. Receiver Enable/Disable Time Measurements
t
RTEN
t
RTZ
V
L
B
A
I
A
TE
2881 F08
RECEIVER
90%
10%
0V
TE
+
–
+
–
V
AB
V
B
R
TE
=
I
A
V
AB
1/2 V
L
RO
I
A
Figure 8. Termination Resistance and Timing Measurements
FuncTional Table
LOGIC INPUTS MODE A, B Y, Z RO
DC/DC
CONVERTER TERMINATOR
ON RE TE DE
1 0 0 0 Receive R
IN
Hi-Z Enabled On Off
1 0 0 1 Transceiver R
IN
Driven Enabled On Off
1 1 0 1 Transmit R
IN
Driven Hi-Z On Off
1 0 1 0 Receive + Term On R
TE
Hi-Z Enabled On On
0 X X X Off R
IN
Hi-Z Hi-Z Off Off