Datasheet > SN75LBC184DR

SN75LBC184DR

更新时间： 2024-09-14 17:15:47

品牌	Logo	应用领域
友台半导体 - UMW		/
页数	文件大小	规格书
15页	228K
描述
RS-485 / RS-422芯片

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中文翻译

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数据手册

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SN75LBC184DR 数据手册

SN75LBC184/

SN65LBC184

UMW

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Integrated Transient Voltage Suppression

ESD Protection for Bus Terminals Exceeds:

30 kV IEC 61000-4-2, Contact Discharge

15 kV IEC 61000-4-2, Air-Gap Discharge

15 kV EIA/JEDEC Human Body Model

GND

Circuit Damage Protection of 400-W Peak

(Typical) Per IEC 61000-4-5

Controlled Driver Output-Voltage Slew

Rates Allow Longer Cable Stub Lengths

functional logic diagram (positive logic)

250-kbps in Electrically Noisy

Environments

Open-Circuit Fail-Safe Receiver Design

1/4 Unit Load Allows for 128 Devices

Connected on Bus

Thermal Shutdown Protection

Power-Up/-Down Glitch Protection

Each Transceiver Meets or Exceeds the

Requirements of TIA/EIA-485 (RS-485) and

ISO/IEC 8482:1993(E) Standards

Low Disabled Supply Current 300 µA Max

Pin Compatible With SN75176

Applications:

− Industrial Networks

− Utility Meters

− Motor Control

Bus

description

The SN75LBC184 and SN65LBC184 are differ-

ential data line transceivers in the trade-standard

footprint of the SN75176 with built-in protection

against high-energy noise transients. This feature

provides a substantial increase in reliability for

better immunity to noise transients coupled to the

data cable over most existing devices. Use of

these circuits provides a reliable low-cost

direct-coupled (with no isolation transformer) data

line interface without requiring any external

components.

1/2 V

1.2 µs

50 µs

The SN75LBC184 and SN65LBC184 can with-

stand overvoltage transients of 400-W peak

(typical). The conventional combination wave

called out in IEC 61000-4-5 simulates the

overvoltage transient and models a unidirectional

surge caused by overvoltages from switching and

secondary lightning transients.

Figure 1. Surge Waveform — Combination Wave

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