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參數(shù)資料
| 型號： | LTC1348C |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 3.3V/5V Low Power RS232 3-Driver/5-Receiver Transceiver |
| 中文描述： | 3.3V/5V的低功耗收發(fā)器的RS232 3-Driver/5-Receiver |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 243K |
| 代理商： | LTC1348C |
1
LTC1348
3.3V/5V Low Power RS232
3-Driver/5-Receiver Transceiver
S
FEATURE
D
The LTC
1348 is a 3-driver/5-receiver RS232 transceiver
with very low supply current. The charge pump only
requires five 0.1
μ
F capacitors. The LTC1348 provides full
RS232 output levels when operated over a wide supply
range of 3V to 5.5V
The transceiver operates in one of four modes: Normal,
Receiver Disable, Receiver Alive and Shutdown. In Normal
or Receiver Disable mode, I
CC
is only 600
μ
A at 3.3V and
800
μ
A at 5V in the no load condition. In Shutdown mode,
the supply current is further reduced to 0.2
μ
A. In Receiver
Alive mode, all five receivers are kept alive and the supply
current is 15
μ
A. All RS232 outputs assume a high imped-
ance state in Shutdown or Receiver Alive mode or with the
power off. The receiver outputs assume a high impedance
state in Receiver Disable or with the power off.
The LTC1348 is fully compliant with all data rate and
overvoltage RS232 specifications. The transceiver oper-
ates up to 120kbaud with all drivers loaded with 1000pF,
3k
. 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: 600
μ
A at 3.3V
I
Supply Current in Shutdown: 0.2
μ
A
I
Supply Current in Receiver Alive Mode: 15
μ
A
I
ESD Protection over
±
10kV
I
Operates from a Single 3V to 5.5V Supply
I
Operates to 120kBaud with 0.1
μ
F Flying Capacitors
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
Flowthrough Architecture
U
S
A
O
PPLICATI
I
Notebook Computers
I
Palmtop Computers
I
Printers
I
Portable Instruments
LT1348 TA01
C5
0.1
μ
F
C2
0.1
μ
F
C3
0.1
μ
F
C4
0.1
μ
F
LTC1348
1
2
3
4
5
6
7
8
9
10
11
12
13
14
DR 1 OUT
RX1 IN
DR 2 OUT
RX2 IN
RX3 IN
RX4 IN
DR 3 OUT
RX5 IN
28
27
26
25
24
23
22
21
20
19
18
17
16
15
DR 1 IN
RX1 OUT
DR 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DR 3 IN
RX5 OUT
DREN
RXEN
V
–
V
+
V
CC
C1
0.1
μ
F
3-Drivers/5-Receivers with Shutdown
U
A
O
PPLICATI
TYPICAL
Supply Current
, LTC and LT are registered trademarks of Linear Technology Corporation.
TEMPERATURE (C)
–40
S
1.4
20
LT1348 TA02
0.8
0.4
–20
0
40
0.2
0
1.6
1.2
1.0
0.6
S
μ
A
1.4
0.8
0.4
0.2
0
1.6
1.2
1.0
0.6
60
80
QUIESCENT
CURRENT
SHUTDOWN
CURRENT
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 3.3V
OR 5V
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