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SN75LBC182 PDF预览

SN75LBC182

更新时间： 2024-10-31 22:53:31
品牌 Logo 应用领域
德州仪器 - TI 总线收发器
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13页 190K
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DIFFERENTIAL BUS TRANSCEIVER

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SN75LBC182 数据手册

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SN65LBC182  
SN75LBC182  
SLLS500 – MAY 2001  
DIFFERENTIAL BUS TRANSCEIVER  
The driver outputs and the receiver inputs connect  
internally to form a differential input/output (I/O) bus port  
that is designed to offer minimum loading to the bus.  
This port operates over a wide range of common-mode  
voltage, making the device suitable for party-line  
applications. The device also includes additional  
features for party-line data buses in electrically noisy  
environment applications such as industrial process  
control or power inverters.  
FEATURES  
D
D
One-Fourth Unit Load Allows up to 128  
Devices on a Bus  
ESD Protection for Bus Terminals:  
– ±15-kV Human Body Model  
– ±8-kV IEC61000-4-2, Contact Discharge  
– ±15-kV IEC61000-4-2, Air-Gap Discharge  
D
D
Meets or Exceeds the Requirements of ANSI  
Standard TIA/EIA-485-A and ISO 8482: 1987(E)  
The SN75LBC182 and SN65LBC182 bus pins also  
exhibit a high input resistance equivalent to one-fourth  
unit load allowing connection of up to 128 similar  
devices on the bus. The high ESD tolerance protects  
the device for cabled connections. (For an even higher  
level of protection, see the SN65/75LBC184, literature  
number SLLS236.)  
Controlled Driver Output-Voltage Slew Rates  
Allow Longer Cable Stub Lengths  
†
D
D
D
D
D
D
Designed for Signaling Rates Up to 250-kbps  
Low Disabled Supply Current . . . 250 µA Max  
Thermal Shutdown Protection  
Open-Circuit Fail-Safe Receiver Design  
Receiver Input Hysteresis . . . 70 mV Typ  
The  
differential  
driver  
design  
incorporates  
slew-rate-controlled outputs sufficient to transmit data  
up to 250 kbps. Slew-rate control allows longer  
unterminated cable runs and longer stub lengths from  
the main backbone than possible with uncontrolled  
voltage transitions. The receiver design provides a  
fail-safe output of a high level when the inputs are left  
floating (open circuit). Very low device supply current  
canbeachievedbydisablingthedriverandthereceiver.  
Glitch-Free Power-Up and Power-Down  
Protection  
APPLICATIONS  
D
D
D
Utility Meters  
Industrial Process Control  
Building Automation  
The SN65LBC182 is characterized for operation from  
–40°C to 85°C, and the SN75LBC182 is characterized  
for operation from 0°C to 70°C.  
DESCRIPTION  
The SN65LBC182 and SN75LBC182 are differential  
datalinetransceiverswithahighlevelofESDprotection  
inthetrade-standardfootprintoftheSN75176. Theyare  
designed for balanced transmission lines and meet  
ANSI standard TIA/EIA-485-A and ISO 8482. The  
SN65LBC182 and SN75LBC182 combine a 3-state,  
differential line driver and differential input line receiver,  
both of which operate from a single 5-V power supply.  
The driver and receiver have active-high and active-low  
enables, respectively, which can be externally  
connected together to function as a direction control.  
functional block diagram  
3
DE  
6
A
B
4
2
D
RE  
R
7
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
†
The signaling rate of a line, is the number of voltage transitions that are made per second expressed in the units bps (bits per second).  
PRODUCTION DATA information is current as of publication date.  
Copyright 2001, Texas Instruments Incorporated  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
www.ti.com  
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SN75LBC182 替代型号

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