LTC1387 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC1387 Datasheet PDF : 12 Pages
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LTC1387
ABSOLUTE AXI U RATI GS
(Note 1)
Supply Voltage (VCC) ............................................. 6.5V
Input Voltage
Drivers ................................... – 0.3V to (VCC + 0.3V)
Receivers ............................................. – 25V to 25V
485/232, ON, DXEN
RXEN, SLEW ........................... – 0.3V to (VCC + 0.3V)
Output Voltage
Drivers ................................................. – 18V to 18V
Receivers ............................... – 0.3V to (VCC + 0.3V)
Short-Circuit Duration
Output ........................................................ Indefinite
VDD, VEE, C1+, C1–, C2+, C2– .......................... 30 sec
Operating Temperature Range
LTC1387C .............................................. 0°C to 70°C
LTC1387I ........................................... – 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
C1+ 1
C1– 2
VDD 3
A4
B5
Y6
Z7
485/232 8
DXEN 9
GND 10
TOP VIEW
20 C2+
19 C2–
18 VCC
17 RA
16 RB
15 DY
14 DZ/SLEW
13 ON
12 RXEN
11 VEE
G PACKAGE
20-LEAD PLASTIC SSOP
SW PACKAGE
20-LEAD PLASTIC SO
ORDER PART
NUMBER
LTC1387CG
LTC1387CSW
LTC1387IG
LTC1387ISW
TJMAX = 125°C, θJA = 120°C/W (G)
TJMAX = 125°C, θJA = 75°C/W (SW)
Consult factory for Military grade parts.
DC ELECTRICAL CHARACTERISTICS
TA = 25°C, VCC = 5V, C1 = C2 = C3 = C4 = 0.1µF (Notes 2, 3), unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
RS485 Driver (485/232 = High, ON = DXEN = High)
VOD1
Differential Driver Output Voltage (Unloaded)
IO = 0
VOD2
Differential Driver Output Voltage (With Load)
Figure 1, R = 50Ω (RS422)
Figure 1, R = 27Ω (RS485)
q
q 2.0
q 1.5
6
V
6
V
6
V
∆VOD
Change in Magnitude of Driver Differential
Figure 1, R = 27Ω or R = 50Ω
q
Output Voltage for Complementary Output States
0.2
V
VOC
Driver Common Mode Output Voltage
Figure 1, R = 27Ω or R = 50Ω
q
∆VOC Change in Magnitude of Driver Common Mode
Figure 1, R = 27Ω or R = 50Ω
q
Output Voltage for Complementary Output States
3
V
0.2
V
IOSD
Driver Short-Circuit Current
IOZD
Three-State Output Current (Y, Z)
RS232 Driver (485/232 = Low, ON = DXEN = High)
VO = – 7V, 12V; VO = High
VO = – 7V, 12V; VO = Low (Note 4)
– 7V ≤ VO ≤ 12V
q 35
q 10
250
mA
250
mA
±5
500
µA
VO
Output Voltage Swing
IOSD
Output Short-Circuit Current
Driver Inputs and Control Inputs
Figure 4, RL = 3k, Positive
Figure 4, RL = 3k, Negative
VO = 0V
q5
6.5
V
q –5
– 6.5
V
q
±17 ±60
mA
VIH
Input High Voltage
VIL
Input Low Voltage
IIN
Input Current
DY, DZ, DXEN, RXEN, ON, 485/232, SLEW q 2
V
DY, DZ, DXEN, RXEN, ON, 485/232, SLEW q
0.8
V
DY, DZ, DXEN, RXEN, ON, 485/232
q
SLEW (Note 5)
q
±0.1 ±10
µA
5
15
µA
2
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