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| 型号： | LTC1345ISW#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC TXRX V.35 SINGL SUPPLY 28SOIC |
| 标准包装： | 1,000 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 2/3 |
| 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： | 带卷 (TR) |
7
LTC1345
Review of CCITT Recommendation V.35
Electrical Specifications
V.35 is a CCITT recommendation for synchronous data
transmission via modems. Appendix 2 of the recommen-
dation describes the electrical specifications which are
summarized below:
1. The interface cable is balanced twisted-pair with 80
to
120
impedance.
2. The transmitter’s source impedance is between 50
and
150
.
3. The transmitter’s resistance between shorted terminals
and ground is 150
±15.
4. When terminated by a 100
resistive load, the terminal-
to-terminal voltage should be 0.55V
±20%.
5. The transmitter’s rise time should be less than 1% of the
signal pulse or 40ns, whichever is greater.
6. The common-mode voltage at the transmitter output
should not exceed 0.6V.
7. The receiver impedance is 100
±10.
8. The receiver impedance to ground is 150
±15.
9. The transmitter or receiver should not be damaged by
connection to earth ground, short-circuiting, or cross
connection to other lines.
10. No data errors should occur with
±2V common-mode
change at either the transmitter or receiver, or
±4V ground
potential difference between transmitter and receiver.
Cable Termination
Each end of the cable connected to an LTC1345 must be
terminated by either one of two electrically equivalent
external Y or
resistor networks for proper operation. The
Y-termination has two series connected 50
resistors and
a 125
resistor connected between ground and the center
tap of the two 50
resistors as shown in Figure 6A.
Figure 6. Y and
Termination Networks
50
50
125
A
LTC1345 F06
300
300
120
B
The alternative
-termination has a 120 resistor across
the twisted wires and two 300
resistors between each
wire and ground as shown in Figure 6B. Standard 1/8W,
5% surface mount resistors can be used for the termination
network. To maintain the proper differential output swing,
the resistor tolerance must be 5% or less. A termination
network that combines all the resistors into an SO-14
package is available from:
BI Technologies (Formerly Beckman Industrial)
Resistor Networks
4200 Bonita Place
Fullerton, CA 92635
Phone: (714) 447-2357
FAX: (714) 447-2500
Part #: BI Technologies 627T500/1250 (SOIC)
899TR50/125 (DIP)
APPLICATIO S I FOR ATIO
WU
UU
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| LTC1346ACSW | 功能描述:IC TXRX V.35 DCE/DTE 24-SOIC 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:250 系列:- 类型:收发器 驱动器/接收器数:2/2 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-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR) |
| LTC1346ACSW#PBF | 功能描述:IC TXRX V.35 DCE/DTE 24-SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:250 系列:- 类型:收发器 驱动器/接收器数:2/2 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-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR) |
| LTC1346ACSW#TR | 功能描述:IC TXRX V.35 DCE/DTE 24SOIC 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:250 系列:- 类型:收发器 驱动器/接收器数:2/2 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-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR) |
| LTC1346ACSW#TRPBF | 功能描述:IC TXRX V.35 DCE/DTE 24-SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:250 系列:- 类型:收发器 驱动器/接收器数:2/2 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-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR) |
| LTC1347CG | 功能描述:IC TXRX 5V RS232 LOW PWR 28-SSOP 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 |
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