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LTC491 Datasheet(Fiches technique) 2 Page - Linear Technology

Numéro de pièce LTC491
Description  Differential Driver and Receiver Pair
Télécharger  12 Pages
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Fabricant  LINER [Linear Technology]
Site Internet  http://www.linear.com
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 2 page
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LTC491
2
A
G
A
U
A
R
BSOLUTEXI
TI
S
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
LTC491CN
LTC491CS
LTC491IN
LTC491IS
(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
LTC491C.................................................. 0
°C to 70°C
LTC491I.............................................. – 40
°C to 85°C
Storage Temperature Range ................. – 65
°C to 150°C
Lead Temperature (Soldering, 10 sec.)................. 300
°C
14
13
12
11
10
9
8
7
6
5
4
3
2
1
TOP VIEW
S PACKAGE
14-LEAD PLASTIC SOIC
NC
N PACKAGE
14-LEAD PLASTIC DIP
Y
NC
Z
B
NC
VCC
D
GND
GND
R
REB
DE
LTC491 • POI01
A
R
D
Consult factory for Military grade parts.
ELECTRICAL C
C
HARA TERISTICS
C
D
VCC = 5V ±5%
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VOD1
Differential Driver Output Voltage (Unloaded)
IO = 0
q
5V
VOD2
Differential Driver Output Voltage (With load)
R = 50
Ω; (RS422)
q
2V
R = 27
Ω; (RS485) (Figure 1)
q
1.5
5
V
∆VOD
Change in Magnitude of Driver Differential Output
R = 27
Ω or R = 50Ω (Figure 1)
q
0.2
V
Voltage for Complementary Output States
VOC
Driver Common Mode Output Voltage
q
3V
∆ VOC
Change in Magnitude of Driver Common Mode
q
0.2
V
Output Voltage for Complementary Output States
VIH
Input High Voltage
D, DE, REB
q
2.0
V
VIL
Input Low Voltage
q
0.8
V
lIN1
Input Current
q
±2
µA
lIN2
Input Current (A, B)
VCC = 0V or 5.25V
VIN = 12V
q
1.0
mA
VIN = –7V
q
– 0.8
mA
VTH
Differential Input Threshold Voltage for Receiver
– 7V
≤ VCM ≤ 12V
q
– 0.2
0.2
V
∆VTH
Receiver Input Hysteresis
VCM = 0V
q
70
mV
VOH
Receiver Output High Voltage
IO = –4mA, VID = 0.2V
q
3.5
V
VOL
Receiver Output Low Voltage
IO = 4mA, VID = –0.2V
q
0.4
V
IOZR
Three-State Output Current at Receiver
VCC = Max 0.4V ≤ VO ≤ 2.4V
q
±1
µA
ICC
Supply Current
No Load; D = GND,
Outputs Enabled
q
300
500
µA
or VCC
Outputs Disabled
q
300
500
µA
RIN
Receiver Input Resistance
– 7V
≤ VCM ≤ 12V
q
12
k
IOSD1
Driver Short Circuit Current, VOUT = High
VO = –7V
q
100
250
mA
IOSD2
Driver Short Circuit Current, VOUT = Low
VO = 12V
q
100
250
mA
IOSR
Receiver Short Circuit Current
0V
≤ VO ≤ VCC
q
785
mA
IOZ
Driver Three-State Output Current
VO = – 7V to 12V
q
±2
±200
µA




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