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LTC1535 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC1535
Description  Isolated RS485 Transceiver
PDF  18 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1535 Datasheet(HTML) 3 Page - Linear Technology

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LTC1535
3
1535fb
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VCC
VCC Supply Range
l
4.5
5.5
V
VCC2
VCC2 Supply Range
l
4.5
7.5
V
ICC
VCC Supply Current
Transformer Not Driven (Note 10)
l
13
28
mA
ICC2
VCC2 Supply Current
R = 27Ω, Figure 2
No Load
l
l
63
7
73
12
mA
mA
VOD1
Differential Driver Output
No Load
l
5V
VOD2
Differential Driver Output
R = 50Ω (RS422) (Note 2), VCC2 = 4.5V
R = 27Ω(RS485), Figure 2, VCC2 = 4.5V
l
l
2
1.5
2
V
V
VOC
Driver Output Common Mode Voltage
DC Level, R = 50Ω, Figure 2
l
2.0
2.5
3.0
V
IOSD1
Driver Short-Circuit Current
VOUT = HIGH
VOUT = LOW
Driver Enabled (DE = 1)
–7V ≤ VCM ≤ 10V
–7V ≤ VCM ≤ 10V
l
l
60
60
100
100
150
150
mA
mA
VIH
Logic Input High Voltage
DE, DI, RE
SLO
l
l
2
4
1.7
2.2
V
V
VIL
Logic Input Low Voltage
DE, DI, RE
SLO
l
l
1.7
1.8
0.8
1
V
V
IIN
Input Current (A, B)
(Note 3)
VIN = 12V
l
0.25
mA
VIN = –7V
l
–0.20
mA
VTH
Receiver Input Threshold
–7V ≤ VCM ≤ 12V, (Note 4)
l
–200
–90
–10
mV
ΔVTH
Receiver Input Hysteresis
–7V ≤ VCM ≤ 12V
0°C ≤ TA ≤ 70°C
l
10
30
70
mV
– 40°C ≤ TA ≤ 85°C
l
530
70
mV
RIN
Receiver Input Impedance
l
50
68
100
kΩ
VIOC
Receiver Input Open Circuit Voltage
3.4
V
VOH
RO Output High Voltage
IRO = – 4mA, VCC = 4.5V
l
3.7
4.0
V
VOL
RO Output Low Voltage
IRO = 4mA, VCC = 4.5V
l
0.4
0.8
V
IOZ
Driver Output Leakage
Driver Disabled (DE = 0)
1
μA
VOH2
RO2 Output High Voltage
IRO2 = – 4mA, VCC = 4.5V
l
3.7
3.9
V
VOL2
RO2 Output Low Voltage
IRO2 = 4mA, VCC = 4.5V
l
0.4
0.8
V
fSW
DC Converter Frequency
l
290
420
590
kHz
RSWH
DC Converter Impedance High
l
46
Ω
RSWL
DC Converter Impedance Low
l
2.5
5
Ω
IREL
RE Output Low Current
RE Sink Current, Fault = 0
l
–40
–50
–80
μA
IREH
RE Output High Current
RE Source Current, Fault = 1
l
80
100
130
μA
VUVL
Undervoltage Low Threshold
RE Fault = 1, (Note 5)
l
3.70
4.00
4.25
V
VUVH
Undervoltage High Threshold
RE Fault = 0, (Note 5)
l
4.05
4.20
4.40
V
VISO
Isolation Voltage
1 Minute, (Note 6)
1 Second
2500
3000
VRMS
VRMS
The
l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, VCC2 = 5V unless otherwise noted.



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