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參數(shù)資料
| 型號： | LTC1349IS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | PROBE, LIMIT TEMP, PTC, 90 C; Series:B598; Thermistor type:PTC; Resistance:100R; Voltage, operating:30V; Case style:Radial; Diameter, lead:0.5mm; Length / Height, external:15mm; Length, lead:32mm; Temperature, resistance:25(degree RoHS Compliant: Yes |
| 中文描述： | LINE TRANSCEIVER, PDSO28 |
| 封裝： | PLASTIC, SOL-28 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 221K |
| 代理商： | LTC1349IS |
1
LTC1349
5V Low Power RS232
3-Driver/5-Receiver Transceiver
with 2 Receivers Active
in SHUTDOWN
U
A
O
PPLICATI
TYPICAL
Quiescent and SHUTDOWN Supply Current
vs Temperature
S
FEATURE
D
The LTC1349 is a 3-driver/5-receiver RS232 transceiver
with very low supply current. In the no load condition, the
supply current is only 300
μ
A. The charge pump only
requires four 0.1
μ
F capacitors.
In SHUTDOWN mode, two receivers are kept alive and the
supply current is 35
μ
A. All RS232 outputs assume a high
impedance state in SHUTDOWN and with the power off.
The LTC1349 is fully compliant with all data rate and
overvoltage RS232 specifications. The transceiver can
operate up to 120k baud with a 2500pF, 3k
load. Both
driver outputs and receiver inputs can be forced to
±
25V
without damage, and can survive multiple
±
10kV ESD
strikes.
U
ESCRIPTIO
I
Low Supply Current: 300
μ
A
I
Two Receivers Kept Alive in SHUTDOWN
I
ESD Protection Over
±
10kV
I
Operates from a Single 5V Supply
I
Uses Small Capacitors: 0.1
μ
F
I
Operates to 120k Baud
I
Three-State Outputs Are High Impedance When Off
I
Output Overvoltage Does Not Force Current
Back into Supplies
I
RS232 I/O Lines Can Be Forced to
±
25V
Without Damage
I
Pin Compatible with LT1137A and LT1237
I
Flowthrough Architecture
U
S
A
O
PPLICATI
I
Notebook Computers
I
Palmtop Computers
TEMPERATURE (°C)
Q
μ
A
1200
1000
800
600
400
200
0
–40
20
40
60
LTC1349 TA02
80
0
60
50
40
30
20
10
0
S
μ
A
QUIESCENT
CURRENT
SHUTDOWN
CURRENT
TEST CONDITION:
V
CC
= 5V, ALL DRIVER INPUTS TIED TO V
CC
.
–20
100
3-Drivers/5-Receivers with SHUTDOWN
LTC1349 TA01
V
CC
C1
0.1
μ
F
LTC1349
1
2
3
4
5
6
7
8
9
10
11
12
13
14
DRIVER 1 OUT
RX1 IN
DRIVER 2 OUT
RX2 IN
RX3 IN
RX4 IN
DRIVER 3 OUT
RX5 IN
ON/OFF
NC
28
27
26
25
24
23
22
21
20
19
18
17
16
15
C3
0.1
μ
F
DRIVER 1 IN
RX1 OUT
DRIVER 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DRIVER 3 IN
RX5 OUT
GND
NC
NC
V
–
V
+
C2
0.1
μ
F
C4
0.1
μ
F
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