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| 型号： | LT1780 |
| 厂商： | Linear Technology Corporation |
| 元件分类： | 外设及接口 |
| 英文描述： | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| 中文描述： | 单电源RS232C接口线路驱动器/接收器（单电源RS232C接口线收发器（2发2收）） |
| 文件页数： | 1/12页 |
| 文件大小： | 244K |
| 代理商： | LT1780 |
1
LT1780/LT1781
Low Power 5V RS232
Dual Driver/Receiver with
±
15kV ESD Protection
D
U
ESCRIPTIO
The LT
1780/LT1781 are dual RS232 driver/receiver pairs
with integral charge pump to generate RS232 voltage
levels from a single 5V supply. Using only 0.1
μ
F external
capacitors, these circuits consume only 40mW of power,
and can operate to 120kbaud even while driving heavy
capacitive loads. New ESD structures on the chip allow the
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.
The LT1780/LT1781 are direct upgrades to the LT1180A/
LT1181A, LT1280A/LT1281A and LT1381 for applications
which require the utmost ESD protection.
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.
TransZorb is a registered trademark of General Instruments, GSI.
R
C
L
= 50pF
Output Waveforms
1780/81 TA02
DRIVER
OUTPUT
R
= 3k
C
L
= 2500pF
RECEIVER
OUTPUT
INPUT
0.1
μ
F
0.1
μ
F
0.1
μ
F
0.1
μ
F
LOGIC
INPUTS
LOGIC
OUTPUTS
ON/OFF
18
10
13
11
12
6
5
4
2
16
9
14
8
15
7
3
17
5V INPUT
V
+
OUT
V
–
OUT
RS232 OUTPUT
RS232 OUTPUT
RS232 INPUT
RS232 INPUT
1780/81 TA01
5k
5k
LT1780
U
A
O
PPLICATI
TYPICAL
S
FEATURE
I
10mA Max Supply Current
I
ESD Protection to IEC 1000-4-2 Level 4
±
15kV Air Gap,
±
8kV Contact
I
Uses Small Capacitors: 0.1
μ
F
I
120kBaud Operation for R
L
= 3k, C
L
= 2500pF
I
250kBaud Operation for R
L
= 3k, C
L
= 1000pF
I
Outputs Withstand
±
30V Without Damage
I
CMOS Comparable Low Power: 40mW
I
Operates from a Single 5V Supply
I
Rugged Bipolar Design
I
Outputs Assume a High Impedance State When Off
or Powered Down
I
Meets All RS232 Specifications
I
Available With or Without Shutdown
I
Absolutely No Latch-up
I
Portable Computers
I
Battery-Powered Systems
I
Power Supply Generator
I
Terminals
I
Modems
U
S
A
O
PPLICATI
, LTC and LT are registered trademarks of Linear Technology Corporation.
相关PDF资料 |
PDF描述 |
|---|---|
| LT1781 | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| LT1781CN | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| LT1780CN | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| LT1780CSW | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| LT1781CS | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
相关代理商/技术参数 |
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| LT17801IN | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Transceiver |
| LT1780CN | 功能描述:IC DVR/RCVR 5V RS232 DUAL 18-DIP RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| LT1780CN#PBF | 功能描述:IC DVR/RCVR 5V RS232 DUAL 18-DIP RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:RS-232 & USB Transceiver 标准包装:2,000 系列:- 类型:收发器 驱动器/接收器数:1/1 规程:RS232 电源电压:3 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:16-SSOP（0.209"，5.30mm 宽） 供应商设备封装:16-SSOP 包装:带卷 (TR) 其它名称:296-19849-2 |
| LT1780CSW | 功能描述:IC DVR/RCVR 5V RS232 DUAL 18SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| LT1780CSW#PBF | 功能描述:IC DVR/RCVR 5V RS232 DUAL 18SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:RS-232 & USB Transceiver 标准包装:2,000 系列:- 类型:收发器 驱动器/接收器数:1/1 规程:RS232 电源电压:3 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:16-SSOP（0.209"，5.30mm 宽） 供应商设备封装:16-SSOP 包装:带卷 (TR) 其它名称:296-19849-2 |
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