Datasheet > UM3089EESD

UM3089EESD

更新时间： 2024-02-16 22:54:58

品牌	Logo	应用领域
英联电子 - UNIONSEMI		/
页数	文件大小	规格书
14页	764K
描述
Â±15kV ESD-Protected, Fail-Safe, Hot-Swappable Auto Polarity Reversal RS-485 Transceivers

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UM3089EESD 数据手册

UM3089E

±15kV ESD-Protected, Fail-Safe, Hot-Swappable

Auto Polarity Reversal RS-485 Transceivers

UM3089E SOP14

General Description

The UM3089E series are +5.0V powered, ±15kV ESD protected, fail-safe, hot-swappable, auto

polarity reversal RS-485 transceivers. The device includes fail-safe circuitry, which guarantees a

logic-high receiver output when the receiver inputs are open, shorted or idle. This means that the

receiver output will be logic high if all transmitters on a terminated bus are disabled (high

impedance). The UM3089E features reduced slew-rate driver that minimizes EMI and reduces

reflections caused by improperly terminated cables, allowing error-free data transmission up to

500kbps. All transmitter outputs and receiver inputs are protected to ±15kV using the Human

Body Model and IEC61000-4-2, Air-Gap Discharge.

The UM3089E includes cable auto-invert functions that reverse the polarity of the RS485 bus pins

in case the cable is misconnected. Receiver’s full fail-safe features are maintained even when the

receiver polarity has been reversed.

The transceivers typically draw 300μA of supply current when unloaded, or when fully loaded

with the drivers disabled, and 1μA of supply current when shutdown. The device has a

1/8-unit-load receiver input impedance that allows up to 256 transceivers on the bus and is

intended for half-duplex communications. The device also has over current protection and thermal

shutdown protection.

Applications

Features



Air-Condition, Building Lighting and



Automatic Polarity Reversal RS-485

Transceivers

Environmental Control Systems

Industrial-Control Local Area

Networks

PROFIBUS® and Other RS-485 Based

Field Bus Networks

High Node Count RS-485 Systems

Transceivers for EMI-Sensitive

Applications

Smart Meters/Automated Meter

Reading Systems

1μA shutdown current and 300uA receiver

current

True Fail-Safe Receiver and Hot-Swappable

Enhanced Slew-Rate Limiting

Allows up to 256 Transceivers on the Bus

Thermal Shutdown

Current-Limiting for Driver Overload

Protection.

ESD Protection for RS-485 I/O Pins

±15kV—IEC61000-4-2, Air-Gap Discharge

±8kV—IEC61000-4-2, Contact Discharge



Pin Configurations

Top View

14 13 12 11

V_CC

UM3089EESD

GND

XX: Week Code

Ordering Information

Part Number

Marking Code

Package Type

Shipping Qty

2500pcs/13 Inch Tape & Reel

UM3089EESD

SOP14

________________________________________________________________________

http://www.union-ic.com Rev.02 Jan.2014 1/14

12 3 4 5 6 7...14

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