參數(shù)資料
型號(hào)： LTC1387ISW
廠商： LINEAR TECHNOLOGY CORP
元件分類： 通用總線功能
英文描述： Single 5V RS232/RS485 Multiprotocol Transceiver
中文描述： LINE TRANSCEIVER, PDSO20
封裝： 0.300 INCH, PLASTIC, SOP-20
文件頁(yè)數(shù)： 3/12頁(yè)
文件大?。?/td> 167K
代理商： LTC1387ISW
3
LTC 1387
DC ELECTRICAL CHARACTERISTICS
T
A
= 25
°
C, V
CC
= 5V, C1 = C2 = C3 = C4 = 0.1
μ
F (Notes 2, 3), unless otherwise noted.
SYMBOL
RS485 Receiver (485/232 = High, ON = RXEN = High)
V
TH
Differential Input Threshold Voltage
V
TH
Input Hysteresis
I
IN
Input Current (A, B)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
–7V
≤
V
CM
≤
12V
V
CM
= 0V
V
IN
= 12V
V
IN
= –7V
–7V
≤
V
IN
≤
12V
G
–0.20
0.20
V
40
mV
mA
mA
k
G
G
1
–0.8
12
R
IN
RS232 Receiver (485/232 = Low, ON = RXEN = High)
V
TH
Receiver Input Voltage Threshold
Input Resistance
G
24
Input Low Threshold
Input High Threshold
G
G
0.8
V
V
V
2.4
V
TH
R
IN
Receiver Output (ON = RXEN = High)
V
OH
Receiver Output High Voltage
V
OL
Receiver Output Low Voltage
I
OSR
Short-Circuit Current
I
OZR
Three-State Output Current
Power Supply Generator
V
DD
V
DD
Output Voltage
Receiver Input Hysteresis
Receiver Input Resistance
0.6
5
V
IN
=
±
10V
3
7
k
I
O
= –3mA, V
IN
= 0V, 485/232 = Low
I
O
= 3mA, V
IN
= 3V, 485/232 = Low
0V
≤
V
O
≤
V
CC
RXEN = 0V
G
3.5
4.6
0.2
V
V
G
0.4
85
±
10
G
7
mA
μ
A
G
±
0.1
No Load, ON = DXEN = RXEN = High
I
DD
= –5mA, ON = DXEN = RXEN = High
No Load, ON = DXEN = RXEN = High
I
EE
= 5mA, ON = DXEN = RXEN = High
8
7
V
V
V
V
V
EE
V
EE
Output Voltage
–7.7
–7.0
Power Supply
I
CC
V
CC
Supply Current
No Load, ON = DXEN = RXEN = High
Shutdown, ON = DXEN = RXEN = 0V
G
G
7
5
25
100
mA
μ
A
AC ELECTRICAL CHARACTERISTICS
T
A
= 25
°
C, V
CC
= 5V, C1 = C2 = C3 = C4 = 0.1
μ
F (Notes 2, 3), unless otherwise noted.
SYMBOL
RS232 Mode (ON = DXEN = RXEN = High, 485/232 = Low)
SR
Slew Rate
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Figure 4, R
L
= 3k, C
L
= 15pF
Figure 4, R
L
= 3k, C
L
= 1000pF
Figure 4, R
L
= 3k, C
L
= 2500pF
Figures 4, 10, R
L
= 3k, C
L
= 15pF
Figures 4, 10, R
L
= 3k, C
L
= 15pF
Figures 5, 11
Figures 5, 11
G
G
30
V/
μ
s
V/
μ
s
μ
s
μ
s
μ
s
μ
s
μ
s
4
t
T
t
PLH
t
PHL
t
PLH
t
PHL
RS485 Mode (Fast Slew Rate, ON = DXEN = High, 485/232 = High, SLEW = High)
t
PLH
Driver Input to Output
t
PHL
Driver Input to Output
t
SKEW
Driver Output to Output
t
r
, t
f
Driver Rise or Fall Time
Transition Time
Driver Input to Output
Driver Input to Output
Receiver Input to Output
Receiver Input to Output
G
0.22
1.9
0.6
0.6
0.3
0.4
3.1
4
4
6
6
G
G
G
G
Figures 2, 7, R
L
= 54
, C
L
= 100pF
Figures 2, 7, R
L
= 54
, C
L
= 100pF
Figures 2, 7, R
L
= 54
, C
L
= 100pF
Figures 2, 7, R
L
= 54
, C
L
= 100pF
G
15
15
40
40
5
15
70
70
15
40
ns
ns
ns
ns
G
G
G
3
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