LT1485 Просмотр технического описания (PDF) - Linear Technology
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LT1485 Datasheet PDF : 12 Pages
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LTC1485
ABSOLUTE AXI U RATI GS
(Note 1)
Supply Voltage (VCC) .............................................. 12V
Control Input Voltages ................... – 0.5V to VCC + 0.5V
Control Input Currents ........................ – 50mA to 50mA
Driver Input Voltages ..................... – 0.5V to VCC + 0.5V
Driver Input Currents .......................... – 25mA to 25mA
Driver Output Voltages ......................................... ±14V
Receiver Input Voltages ........................................ ±14V
Receiver Output Voltages .............. – 0.5V to VCC + 0.5V
Operating Temperature Range
LTC1485C............................................... 0°C to 70°C
LTC1485I .......................................... – 40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................ 300°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
RO 1
R
RE 2
DE 3
D
DI 4
8 VCC
7B
6A
5 GND
N8 PACKAGE
S8 PACKAGE
8-LEAD PLASTIC DIP 8-LEAD PLASTIC SOIC
TJMAX = 125°C, θJA = 100°C/ W (N)
TJMAX = 150°C, θJA = 150°C/ W (S)
Consult factory for Military grade parts.
ORDER PART
NUMBER
LTC1485CN8
LTC1485IN8
LTC1485CS8
LTC1485IS8
S8 PART MARKING
1485
1485I
DC ELECTRICAL CHARACTERISTICS
VCC = 5V (Notes 2, 3), unless otherwise noted.
SYMBOL
VOD1
VOD2
PARAMETER
Differential Driver Output Voltage (Unloaded)
Differential Driver Output Voltage (With Load)
∆VOD
VOC
∆| VOC|
VINH
VINL
IIN1
IIN2
Change in Magnitude of Driver Differential
Output Voltage for Complementary Output States
Driver Common-Mode Output Voltage
Change in Magnitude of Driver Common-Mode
Output Voltage for Complementary Output States
Input High Voltage
Input Low Voltage
Input Current
Input Current (A, B)
VTH
∆VTH
VOH
VOL
IOZR
ICC
Differential Input Threshold Voltage for Receiver
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
Three-State Output Current at Receiver
Supply Current
RIN
IOSD1
IOSD2
IOSR
Receiver Input Resistance
Driver Short-Circuit Current, VOUT = High
Driver Short-Circuit Current, VOUT = Low
Receiver Short-Circuit Current
CONDITIONS
MIN TYP MAX
IO = 0
q
5
V
R = 50Ω, (RS422)
q
2
R = 27Ω, (RS485) (Figure 1)
q 1.5
5
R = 27Ω or R = 50Ω (Figure 1) q
0.2
R = 27Ω or R = 50Ω (Figure 1) q
3
R = 27Ω or R = 50Ω (Figure 1) q
0.2
DI, DE, RE
q 2.0
DI, DE, RE
q
0.8
DI, DE, RE
q
±2
VCC = 0V or 5.25V, VIN = 12V
q
1.0
VCC = 0V or 5.25V, VIN = – 7V
q
– 0.8
– 7V ≤ VCM ≤ 12V
q – 0.2
0.2
VCM = 0V
q
60
IO = – 4mA, VID = 0.2V
q 3.5
IO = 4mA, VID = – 0.2V
q
0.4
VCC = Max 0.4V ≤ VO ≤ 2.4V
q
±1
No Load; DI = GND or VCC
Outputs Enabled
q
1.8
2.3
Outputs Disabled
q
1.7
2.3
– 7V ≤ VCM ≤ 12V
VO = – 7V
VO = 10 V
0V ≤ VO ≤ VCC
q
12
q
250
q
250
q
7
85
UNITS
V
V
V
V
V
V
V
µA
mA
mA
V
mV
V
V
µA
mA
mA
kΩ
mA
mA
mA
2
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