LTC2857 Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Fabricante
LTC2857 Datasheet PDF : 20 Pages
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LTC2856-1/LTC2856-2
LTC2857-1/LTC2857-2
LTC2858-1/LTC2858-2
TEST CIRCUITS
±VAB/2
VCM
±VAB/2
A
RECEIVER
B
RO
CL
285678 F06
VAB
A-B
0
–VAB
tPLHR
tPHLR
VCC
90%
90%
RO
VO
10% 1/2 VCC
1/2 VCC 10%
0
tRR
285678 F06b
tFR
tSKEWR = tPLHR – tPHLR
Figure 6. Receiver Propagation Delay Measurements
A
0V OR VCC
RO
RECEIVER
RL VCC
OR
B
VCC OR 0V
RE
CL
GND
DI = 0V OR VCC
285678 F07a
VCC
RE
0V
VCC
RO
VO
VOL
VOH
RO
0V
tZLR,
tZLSR
1/2 VCC
tLZR
1/2 VCC
1/2 VCC
tZHR,
tZHSR
tHZR
Figure 7. Receiver Enable/Disable Time Measurements
0.5V
0.5V
285678 F05b
FUNCTION TABLES
LTC2856-1, LTC2856-2
LOGIC INPUTS
DE
RE
0
0
0
1
1
0
1
1
MODE
Receive
Shutdown
Transceive
Transmit
A, B
RIN
RIN
Driven
Driven
RO
Driven
High-Z
Driven
High-Z
LTC2858-1, LTC2858-2
LOGIC INPUTS
DE
RE
MODE
A, B
0
0
Receive
RIN
0
1 Shutdown
RIN
1
0 Transceive
RIN
1
1
Transmit
RIN
Y, Z
High-Z
High-Z
Driven
Driven
RO
Driven
High-Z
Driven
High-Z
285678fe
8
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