LTC1387 Linear Technology, LTC1387 Datasheet - Page 3

• Manufacturer Part Number: LTC1387
• Description: Single 5V RS232/RS485 Multiprotocol Transceiver
• Manufacturer: Linear Technology

DC ELECTRICAL CHARACTERISTICS
AC ELECTRICAL CHARACTERISTICS
SYMBOL
RS232 Mode (ON = DXEN = RXEN = High, 485/232 = Low)
SR
t
t
t
t
t
RS485 Mode (Fast Slew Rate, ON = DXEN = High, 485/232 = High, SLEW = High)
t
t
t
t
T
SYMBOL
RS485 Receiver (485/232 = High, ON = RXEN = High)
V
I
R
RS232 Receiver (485/232 = Low, ON = RXEN = High)
V
R
Receiver Output (ON = RXEN = High)
V
V
I
I
Power Supply Generator
V
V
Power Supply
I
T
T
PLH
PHL
PLH
PHL
SKEW
r
IN
OSR
OZR
CC
PLH
PHL
, t
A
TH
TH
OH
OL
DD
EE
A
V
IN
V
IN
TH
TH
f
= 25 C, V
= 25 C, V
PARAMETER
Slew Rate
Transition Time
Driver Input to Output
Driver Input to Output
Receiver Input to Output
Receiver Input to Output
Driver Input to Output
Driver Input to Output
Driver Output to Output
Driver Rise or Fall Time
PARAMETER
Differential Input Threshold Voltage
Input Hysteresis
Input Current (A, B)
Input Resistance
Receiver Input Voltage Threshold
Receiver Input Hysteresis
Receiver Input Resistance
Receiver Output High Voltage
Receiver Output Low Voltage
Short-Circuit Current
Three-State Output Current
V
V
V
DD
EE
CC
CC
CC
Output Voltage
Supply Current
Output Voltage
= 5V, C1 = C2 = C3 = C4 = 0.1 F (Notes 2, 3), unless otherwise noted.
= 5V, C1 = C2 = C3 = C4 = 0.1 F (Notes 2, 3), unless otherwise noted.
Figure 4, R
Figure 4, R
Figure 4, R
Figures 4, 10, R
Figures 4, 10, R
Figures 5, 11
Figures 5, 11
Figures 2, 7, R
Figures 2, 7, R
Figures 2, 7, R
Figures 2, 7, R
– 7V V
V
V
V
– 7V V
Input Low Threshold
Input High Threshold
V
I
I
0V V
RXEN = 0V
No Load, ON = DXEN = RXEN = High
I
No Load, ON = DXEN = RXEN = High
I
No Load, ON = DXEN = RXEN = High
Shutdown, ON = DXEN = RXEN = 0V
O
O
DD
EE
CM
IN
IN
IN
CONDITIONS
CONDITIONS
= – 3mA, V
= 3mA, V
= 5mA, ON = DXEN = RXEN = High
= 12V
= – 7V
= 10V
= – 5mA, ON = DXEN = RXEN = High
= 0V
O
CM
IN
V
L
L
L
IN
CC
= 3k, C
= 3k, C
= 3k, C
12V
IN
12V
= 3V, 485/232 = Low
L
L
L
L
L
L
= 0V, 485/232 = Low
= 54 , C
= 54 , C
= 54 , C
= 54 , C
= 3k, C
= 3k, C
L
L
L
= 15pF
= 1000pF
= 2500pF
L
L
L
L
L
L
= 15pF
= 15pF
= 100pF
= 100pF
= 100pF
= 100pF
– 0.20
– 0.8
0.22
MIN
MIN
0.8
3.5
15
15
12
4
3
3
7
– 7.7
– 7.0
TYP
TYP
1.9
0.6
0.6
0.3
0.4
0.6
4.6
0.2
40
40
15
40
24
0.1
5
5
8
7
7
5
LTC1387
MAX
MAX
0.20
100
3.1
2.4
0.4
30
70
70
15
40
85
25
4
4
6
6
1
7
10
UNITS
UNITS
V/ s
V/ s
3
mV
mA
mA
mA
mA
k
k
ns
ns
ns
ns
V
V
V
V
V
V
A
V
V
V
V
A
s
s
s
s
s