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LTC2870IFEPBF Datasheet(PDF) 7 Page - Linear Technology

Part # LTC2870IFEPBF
Description  RS232/RS485 Multiprotocol Transceivers with Integrated Termination
Download  36 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2870IFEPBF Datasheet(HTML) 7 Page - Linear Technology

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LTC2870/LTC2871
7
28701f
TYPICAL PERFORMANCE CHARACTERISTICS
VCC Supply Current
vs RS232 Data Rate
VCC Supply Current vs Supply
Voltage, All Transceivers at Max
Rate (LTC2871)
RS485 Driver Differential Output
Voltage vs Temperature
RS485 Driver Propagation Delay
vs Temperature
RS485 Driver Skew
vs Temperature
RS485 Driver Short-Circuit
Current vs Short-Circuit Voltage
VCC Supply Current vs Supply
Voltage in Shutdown Mode
VCC Supply Current vs Supply
Voltage in Fast Enable Mode
VCC Supply Current
vs RS485 Data Rate
INPUT VOLTAGE (V)
3
30
25
20
15
10
5
0
4.5
5
3.5
28701 G01
5.5
4
H/F LOW
H/F HIGH
SUPPLY VOLTAGE (V)
3
5
4
3
2
1
4.5
5
3.5
28701 G02
5.5
4
–40°C
25°C
85°C
ALL DRIVERS AND RECEIVERS DISABLED
TE485 LOW
DATA RATE (Mbps)
0.1
100
80
60
40
20
0
10
28701 G03
100
1
TE HIGH
TE LOW
VCC = 5V
VCC = 3.3V
ALL RS485 DRIVERS
AND RECEIVERS
SWITCHING.
CL = 100pF ON EACH
DRIVER OUTPUT.
DATA RATE (kbps)
0
35
30
25
15
20
10
5
400
28701 G04
500
300
200
100
0.05nF
0.05nF
0.5nF
0.5nF
2.5nF
2.5nF
VCC = 5V
VCC = 3.3V
ALL RS232 DRIVERS
AND RECEIVERS
SWITCHING.
SUPPLY VOLTAGE (V)
3
120
110
100
90
80
70
4.5
5
3.5
28701 G05
5.5
4
85°C
ALL DRIVERS AND
RECEIVERS SWITCHING.
DRIVER OUTPUTS TIED TO
RECEIVER INPUTS.
RS232: 0.5Mbps (CL = 500pF)
RS485: 20Mbps (CL = 100pF)
TE485 HIGH
25°C
–40°C
TEMPERATURE (°C)
–50
4.5
3.5
2.5
1.5
4.0
3.0
2.0
1.0
0.5
0
50
75
–25
28701 G06
100
25
0
RL = 100Ω
RL = 54Ω
RL = 100Ω
RL = 54Ω
VCC = 5V
VCC = 3.3V
TEMPERATURE (°C)
–50
50
40
30
20
10
0
50
75
–25
28701 G06
100
25
0
VCC = 3.3V, VL = 1.7V
VCC = 5V, VL = 1.7V
VCC = 3.3V, VL = 3.3V
VCC = 5V, VL = 5V
TEMPERATURE (°C)
–50
3.0
2.5
1.5
2.0
1.0
0.5
0
50
75
–25
28701 G08
100
25
0
SHORT-CIRCUIT VOLTAGE (V)
–10
150
100
0
50
–50
–100
–150
10
–5
28701 G09
15
5
0
OUTPUT LOW
OUTPUT HIGH
VCC = 5V
VCC = 3.3V
TA = 25°C, VCC = VL = 3.3V, unless otherwise noted.


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