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參數(shù)資料
| 型號(hào)： | LTC1349ISW#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 0K |
| 描述： | IC TXRX 5V RS232 LOW PWR 28-SOIC |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 類型： | 收發(fā)器 |
| 驅(qū)動(dòng)器/接收器數(shù)： | 3/5 |
| 規(guī)程： | RS232 |
| 電源電壓： | 4.5 V ~ 5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-SOIC |
| 包裝： | 帶卷 (TR) |
1
LTC1349
1349fa
5V Low Power RS232
3-Driver/5-Receiver Transceiver
with 2 Receivers Active
in Shutdown
Quiescent and Shutdown Supply Current
vs Temperature
■
Low Supply Current: 300A
■
Two Receivers Kept Alive in Shutdown
■
ESD Protection Over ±10kV
■
Operates from a Single 5V Supply
■
Uses Small Capacitors: 0.1F
■
Operates to 120k Baud
■
Three-State Outputs Are High Impedance When Off
■
Output Overvoltage Does Not Force Current
Back into Supplies
■
RS232 I/O Lines Can Be Forced to ±25V
Without Damage
■
Pin Compatible with LT1137A and LT1237
■
Flowthrough Architecture
The LTC
1349 is a 3-driver/5-receiver RS232 transceiver
with very low supply current. In the no load condition, the
supply current is only 300A. The charge pump only
requires four 0.1F capacitors.
In Shutdown mode, two receivers are kept alive and the
supply current is 35A. 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.
■
Notebook Computers
■
Palmtop Computers
TEMPERATURE (°C)
QUIESCENT
CURRENT
(
A)
1200
1000
800
600
400
200
0
20
40
60
LTC1349 TA02
80
0
–40
60
50
40
30
20
10
0
SHUTDOWN
CURRENT
(
A)
QUIESCENT
CURRENT
SHUTDOWN
CURRENT
TEST CONDITION:
VCC = 5V, ALL DRIVER INPUTS TIED TO VCC.
–20
100
3-Drivers/5-Receivers with Shutdown
LTC1349 TA01
VCC
C1
0.1F
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
0.1F
DRIVER 1 IN
RX1 OUT
DRIVER 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DRIVER 3 IN
RX5 OUT
GND
NC
V–
V+
C2
0.1F
C4
0.1F
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
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