LTC1387 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC1387 Datasheet PDF : 12 Pages
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LTC1387
UU
FU CTIO TABLES
Select Modes
SELECT INPUTS
RECEIVER
ON RXEN DXEN 485/232 RXA RXB
10 0
0
ZZ
10 1
0
ZZ
11 0
0 ON ON
11 1
0 ON ON
DRIVER
DXY DXZ
ZZ
ON ON
ZZ
ON ON
CHARGE PUMP LOOPBACK
ON
OFF
ON
OFF
ON
OFF
ON
OFF
00 1
0
Z Z ON Z
ON
OFF
01 0
0
Z ON ON Z
ON
OFF
01 1
0 ON ON ON ON
ON
ON
00 0
X
ZZ ZZ
OFF
OFF
10 0
1
ZZ ZZ
ON
OFF
X0 1
1
Z Z ON ON
ON
OFF
X1 0
1 ON Z Z Z
ON
OFF
11 1
1 ON Z ON ON
ON
OFF
01 1
1 ON Z ON ON
ON
ON
COMMENTS
RS232 Mode, DX and RX Off
RS232 Mode, DXY and DXZ On, RX Off
RS232 Mode, DX Off, RXA and RXB On
RS232 Mode, DXY and DXZ On,
RXA and RXB On
RS232 Mode, DXY On, DXZ Off, RX Off
RS232 Mode, DXY On,
DXZ Off, RXA Off, RXB On
RS232 Loopback Mode, DXY and DXZ On,
RXA and RXB On
Shutdown, RS485 RIN
RS485 Mode, DX and RX Off
RS485 Mode, DX On, RX Off
RS485 Mode, DX Off, RX On
RS485 Mode, DX On, RX On
RS485 Loopback Mode, DX On, RX On
RS232 Driver Mode
INPUTS
SELECTED 485/232
D
YES
0
0
YES
0
1
YES
0
X
NO
0
X
RS232 Receiver Mode
SELECTED
INPUTS
485/232
YES
0
YES
0
YES
0
NO
0
CONDITIONS
No Fault
No Fault
Thermal Fault
X
OUTPUTS
Y, Z
1
0
Z
Z
A, B
0
1
Inputs Open
X
OUTPUTS
RA, RB
1
0
1
Z
RS485 Driver Slew Rate
DXEN
INPUTS
485/232
SLEW
1
1
0
1
1
1
0
1
X
OUTPUTS
SLEW RATE
Slow
Fast
Z
RS485 Driver Mode
DXEN
INPUTS
485/232
1
1
1
1
1
1
0
1
D CONDITIONS
OUTPUTS
Z
Y
0
No Fault
0
1
1
No Fault
1
0
X
Thermal Fault
Z
Z
X
X
Z
Z
RS485 Receiver Mode
RXEN
INPUTS
485/232
B–A
1
1
< – 0.2V
1
1
> 0.2V
1
1
Inputs Open
or Shorted to Ground
0
1
X
OUTPUTS
RA
RB
0
Z
1
Z
1
Z
Z
Z
6
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