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参数资料
| 型号： | LT1039ISW#TR |
| 厂商： | Linear Technology |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232 TRPL SHTDWN 18SOIC |
| 标准包装： | 1,000 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 3/3 |
| 规程： | RS232 |
| 电源电压： | 5 V ~ 15 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 18-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 18-SOIC |
| 包装： | 带卷 (TR) |
7
LT1039/LT1039-16
1039fd
APPLICATIONS INFORMATION
WU
U
When driving CMOS logic from a receiver that will be used
in the shutdown mode and there is no other active receiver
on the line, a 51k resistor can be placed from the logic input
to VCC to force a definite logic level when the receiver
output is in a high impedance state.
Keeping Alive One Receiver While in Shutdown
LT1039
25k
LOGIC
SHUTDOWN
INPUT
2
3
16
17
BIAS
RS232
INPUT
ON/OFF
LOGIC
OUTPUT
1039 AI09
RS232 Compatible Shutdown Control Line
LT1039
25k
2
316
17
BIAS
RS232
SHUTDOWN
INPUT
ON/OFF
1039A AI10
Driving CMOS Logic from a Receiver
LT1039
RECEIVER
RS232
INPUT
ON/OFF
INPUT
LOGIC
OUTPUT
*FORCES LOGIC INPUT STATE
WHEN VON/OFF IS LOW
51k*
VCC
1039A AI06
CMOS
LOGIC
To protect against receiver input overloads in excess of
±30V, a voltage clamp can be placed on the data line and
still maintain RS232 compatibility.
Input Overvoltage Protection
RS232
INPUT
LOGIC
OUTPUT
RECEIVER
1039 AI07
30k
1k
30V
5.6k
Driver inputs should not be allowed to float. Any unused
inputs should be tied to VCC.
The BIAS pin is used to “keep alive” one receiver while in
the shutdown mode (all other circuitry being inactive).
This allows a system to be in shutdown and still have one
active receiver for transferring data.
It can also be used to make an RS232 compatible shut-
down control line. Driving the BIAS pin low through a
resistance of 24k to 30k keeps the receiver active. Do not
drive the BIAS pin directly from a logic output without the
series resistor. An unused BIAS pin should be left open.
The receiver input impedance of the LT1039 is nominally
30k
. For applications requiring a 5k input impedance,
a 5.6k resistor can be connected from the receiver input to
ground.
5k
Impedance Matching
1039 AI08
RS232
INPUT
LOGIC
OUTPUT
RECEIVER
30k
5.6k
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| LT103D106MAT2H | 功能描述:多层陶瓷电容器MLCC - SMD/SMT 10uF 25V 20% RoHS:否 制造商:American Technical Ceramics (ATC) 电容:10 pF 容差:1 % 电压额定值:250 V 温度系数/代码:C0G (NP0) 外壳代码 - in:0505 外壳代码 - mm:1414 工作温度范围:- 55 C to + 125 C 产品:Low ESR MLCCs 封装:Reel |
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