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LTC2858IMS-2#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
LTC2856-1/LTC2856-2
LTC2857-1/LTC2857-2
LTC2858-1/LTC2858-2
7
285678ff
For more information www.linear.com/LTC2856-1
TesT circuiTs
DRIVER
DI
R
DIFF
C
L
C
L
285678 F04a
Y
Z
t
PLHD
,
t
PLHDS
1/2 V
O
90% 90%
0 0
t
RD
,
t
RDS
t
FD
,
t
FDS
10%
285678 F04b
10%
V
O
V
CC
Y, Z
DI
Y-Z
0V
t
SKEWD
,t
SKEWDS
t
PHLD
,
t
PHLDS
Figure 4. Driver Timing Measurement
Figure 5. Driver Enable and Disable Timing Measurement
DRIVER
DI
V
CC
OR
GND
GND
OR
V
CC
V
CC
OR
GND
R
L
R
L
C
L
285678 F05a
Y
Z
DE
C
L
t
ZLD
,
t
ZLDS
,
t
ZLSD
,
t
ZLSDS
t
ZHD
,
t
ZHDS
,
t
ZHSD
,
t
ZHSDS
t
HZD
,
t
HZDS
,
t
SHDN
,
t
SHDNS
t
LZD
,
t
LZDS
1/2 V
CC
1/2 V
CC
1/2 V
CC
DE
Y OR Z
Z OR Y
V
CC
V
CC
V
OL
V
O
V
OH
0V
0V
0.5V
0.5V
285678 F05b
LTC2856-1/LTC2856-2
LTC2857-1/LTC2857-2
LTC2858-1/LTC2858-2
8
285678ff
For more information www.linear.com/LTC2856-1
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
LTC2856-1/LTC2856-2
LTC2857-1/LTC2857-2
LTC2858-1/LTC2858-2
9
285678ff
For more information www.linear.com/LTC2856-1
Typical perFormance characTerisTics
Receiver Skew vs Temperature Driver Skew vs Temperature
Driver Propagation Delay
vs Temperature
Driver Output Short-Circuit
Current vs Temperature
Driver Output Low/High Voltage
vs Output Current
Driver Differential Output Voltage
vs Temperature
Receiver Output Voltage vs
Output Current (Source and Sink)
Receiver Propagation Delay
vs Temperature
Supply Current vs Data Rate
TEMPERATURE (°C)
–40
–1
RECEIVER SKEW (ns)
0
1
2
–20 0 20 40
385678 G01
60 80 100
120
V
AB
= 1.5V
C
L
= 15pF
TEMPERATURE (°C)
–40
–1
DRIVER SKEW (ns)
0
1
2
–20 0 20 40
385678 G02
60 80 100
120
R
DIFF
= 54Ω
C
L
= 100pF
TEMPERATURE (°C)
–40
DRIVER PROP DELAY (ns)
12
14
16
80
285678 G03
10
8
0 40
–20 100
20 60 120
6
4
18
R
DIFF
= 54Ω
C
L
= 100pF
TEMPERATURE (°C)
–40
80
OUTPUT SHORT-CIRCUIT CURRENT (mA)
100
120
140
160
–20 0 20 40
285678 G04
60 80 100 120
SOURCE
(V
OUT
= 0V)
SINK
(V
OUT
= 5V)
OUTPUT CURRENT (mA)
0 10
0
OUTPUT VOLTAGE (V)
2
5
V
OH
V
OL
20
40
50
285678 G05
1
4
3
30
60
70
TEMPERATURE (°C)
–40
OUTPUT VOLTAGE (V)
3
4
5
20 60 120
285678 G06
2
1
0
–20 0
40
80 100
R
DIFF
= ∞
R
DIFF
= 100Ω
R
DIFF
= 54Ω
OUTPUT CURRENT (mA)
0
OUTPUT VOLTAGE (V)
3
4
5
4
285678 G07
2
1
0
1
2
3
SINK
SOURCE
5
TEMPERATURE (°C)
–40
PROP DELAY (ns)
50
60
120
285678 G08
40
30
0
40
80
–20
20
60
100
70
45
55
35
65
V
AB
= 1.5V
C
L
= 15pF
DATA RATE (Mbps)
0.1
0
SUPPLY CURRENT (mA)
40
50
60
1 10
100
285678 G09
30
20
10
C
L
= 100pF
R
DIFF
= ∞
R
DIFF
= 100Ω
R
DIFF
= 54Ω
T
A
= 25°C, V
CC
= 5V unless otherwise noted.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LTC2858IMS-2#TRPBF

Mfr. #:
Buy LTC2858IMS-2#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
RS-422/RS-485 Interface IC 5V Full-Duplex 250kbps RS485 Transceiver w/ Enables
Lifecycle:
New from this manufacturer.
Delivery:
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