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LT1780ISW#TRPBF PDF预览

LT1780ISW#TRPBF

更新时间： 2024-01-24 11:09:27
品牌 Logo 应用领域
凌特 - Linear 驱动光电二极管接口集成电路驱动器
页数 文件大小 规格书
12页 247K
描述
LT1780 - Low Power 5V RS232 Dual Driver/Receiver with ±15kV ESD Protection; Package: SO; Pins: 18; Temperature Range: -40°C to 85°C

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中文翻译

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LT1780ISW#TRPBF 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active包装说明：SOP,
针数：18Reach Compliance Code：compliant
风险等级：5.46驱动器位数：2
接口集成电路类型：LINE TRANSCEIVER接口标准：GENERAL PURPOSE
JESD-30 代码：R-PDSO-G18JESD-609代码：e3
长度：11.55 mm湿度敏感等级：1
功能数量：1端子数量：18
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：250认证状态：Not Qualified
接收器位数：2座面最大高度：2.65 mm
表面贴装：YES温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：7.5 mm

LT1780ISW#TRPBF 数据手册

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LT1780/LT1781  
Low Power 5V RS232  
Dual Driver/Receiver with  
±15kV ESD Protection  
U
DESCRIPTIO  
EATURE  
S
F
TheLT®1780/LT1781aredualRS232driver/receiverpairs  
with integral charge pump to generate RS232 voltage  
levels from a single 5V supply. Using only 0.1µF external  
capacitors, these circuits consume only 40mW of power,  
and can operate to 120kbaud even while driving heavy  
capacitiveloads. NewESDstructuresonthechipallowthe  
LT1780/LT1781 to survive ±15kV air gap and ±8kV con-  
tact ESD tests per IEC 1000-4-2, eliminating the need for  
costly TransZorbs® on the RS232 line pins. The LT1780/  
LT1781 are fully compliant with EIA RS232 standards.  
Driver outputs are protected from overload, and can be  
shorted to ground or up to ±30V without damage. During  
SHUTDOWN or power-off conditions, driver and receiver  
outputs are in a high impedance state, allowing line  
sharing.  
■
10mA Max Supply Current  
■
ESD Protection to IEC 1000-4-2 Level 4  
±15kV Air Gap,  
±8kV Contact  
■
■
■
■
■
■
■
■
Uses Small Capacitors: 0.1  
µF  
120kBaud Operation for RL = 3k, CL = 2500pF  
250kBaud Operation for RL = 3k, CL = 1000pF  
Outputs Withstand ±30V Without Damage  
CMOS Comparable Low Power: 40mW  
Operates from a Single 5V Supply  
Rugged Bipolar Design  
Outputs Assume a High Impedance State When Off  
or Powered Down  
Meets All RS232 Specifications  
■
■
■
Available With or Without Shutdown  
Absolutely No Latch-up  
The LT1780/LT1781 are direct upgrades to the LT1180A/  
LT1181A,LT1280A/LT1281AandLT1381forapplications  
which require the utmost ESD protection.  
O U  
PPLICATI  
S
A
■
■
■
■
■
Portable Computers  
Battery-Powered Systems  
Power Supply Generator  
Terminals  
The LT1781 is available in 16-pin DIP,SO and SW pack-  
ages. The LT1780 is supplied in 18-pin DIP and SW  
packages for applications which require SHUTDOWN.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
TransZorb is a registered trademark of General Instruments, GSI.  
Modems  
U
O
TYPICAL APPLICATI  
2
17  
Output Waveforms  
5V INPUT  
+
0.1µF  
0.1µF  
4
3
V
OUT  
0.1µF  
0.1µF  
DRIVER  
OUTPUT  
RL = 3k  
LT1780  
5
7
–
V
OUT  
C
L = 2500pF  
6
12  
15  
RECEIVER  
RS232 OUTPUT  
OUTPUT  
R
LOGIC  
INPUTS  
CL = 50pF  
11  
13  
8
RS232 OUTPUT  
RS232 INPUT  
14  
INPUT  
5k  
5k  
LOGIC  
OUTPUTS  
10  
18  
9
RS232 INPUT  
1780/81 • TA02  
16  
ON/OFF  
1780/81 • TA01  
1
1234567...12

中文翻译

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