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參數(shù)資料
| 型號： | ADM485JN |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TX/RX SINGLE RS-485 5V 8DIP |
| 標準包裝： | 50 |
| 類型： | 收發(fā)器 |
| 驅動器/接收器數(shù)： | 1/1 |
| 規(guī)程： | RS422，RS485 |
| 電源電壓： | 4.75 V ~ 5.25 V |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 8-DIP（0.300"，7.62mm） |
| 供應商設備封裝： | 8-PDIP |
| 包裝： | 管件 |
5 V Low Power
EIA RS-485 Transceiver
ADM485
Rev. F
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
1993–2008 Analog Devices, Inc. All rights reserved.
FEATURES
Meets EIA RS-485 standard
5 Mbps data rate
Single 5 V supply
–7 V to +12 V bus common-mode range
High speed, low power BiCMOS
Thermal shutdown protection
Short-circuit protection
Driver propagation delay: 10 ns typical
Receiver propagation delay: 15 ns typical
High-Z outputs with power off
Superior upgrade for LTC485
APPLICATIONS
Low power RS-485 systems
DTE/DCE interface
Packet switching
Local area networks (LNAs)
Data concentration
Data multiplexers
Integrated services digital network (ISDN)
FUNCTIONAL BLOCK DIAGRAM
A
GND
B
VCC
R
D
RO
RE
DE
DI
ADM485
00
07
8-
0
1
1
2
3
4
8
7
6
5
Figure 1.
GENERAL DESCRIPTION
The ADM485 is a differential line transceiver suitable for high
speed bidirectional data communication on multipoint bus
transmission lines. It is designed for balanced data transmission
and complies with EIA standards RS-485 and RS-422. The part
contains a differential line driver and a differential line receiver.
Both the driver and the receiver can be enabled independently.
When disabled, the outputs are three-stated.
The ADM485 operates from a single 5 V power supply.
Excessive power dissipation caused by bus contention or by
output shorting is prevented by a thermal shutdown circuit. If
during fault conditions, a significant temperature increase is
detected in the internal driver circuitry, this feature forces the
driver output into a high impedance state.
Up to 32 transceivers can be connected simultaneously on a
bus, but only one driver should be enabled at any time. It is
important, therefore, that the remaining disabled drivers do not
load the bus. To ensure this, the ADM485 driver features high
output impedance when disabled and when powered down,
which minimizes the loading effect when the transceiver is not
being used. The high impedance driver output is maintained
over the common-mode voltage range of 7 V to +12 V.
The receiver contains a fail-safe feature that results in a logic
high output state if the inputs are unconnected (floating).
The ADM485 is fabricated on BiCMOS, an advanced mixed
technology process combining low power CMOS with fast
switching bipolar technology. All inputs and outputs contain
protection against ESD; all driver outputs feature high source
and sink current capability. An epitaxial layer is used to guard
against latch-up.
The ADM485 features extremely fast switching speeds. Minimal
driver propagation delays permit transmission at data rates up
to 5 Mbps while low skew minimizes EMI interference.
The part is fully specified over the commercial and industrial
temperature range and is available in 8-lead PDIP, 8-lead SOIC,
and small footprint, 8-lead MSOP packages.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADM485JNZ | 功能描述:IC TXRX SINGLE RS485 5V 8DIP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅動器，接收器，收發(fā)器 系列:- 標準包裝:1 系列:- 類型:線路收發(fā)器 驅動器/接收器數(shù):5/3 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC 包裝:Digi-Reel® 產(chǎn)品目錄頁面:918 (CN2011-ZH PDF) 其它名稱:296-25096-6 |
| ADM485JNZ1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Meets EIA RS-485 standard |
| ADM485JR | 制造商:Analog Devices 功能描述:Single Transmitter/Receiver RS-422/RS-485 8-Pin SOIC N 制造商:Analog Devices 功能描述:RS485 I/F TRANSCEIVER SOIC8 485 制造商:Analog Devices 功能描述:5 V Low Power EIA RS-485 Transceiver |
| ADM485JR | 制造商:Analog Devices 功能描述:SEMICONDUCTORSLINEAR |
| ADM485JR-REEL | 制造商:Analog Devices 功能描述:Single Transmitter/Receiver RS-422/RS-485 8-Pin SOIC N T/R 制造商:Rochester Electronics LLC 功能描述:RS-485 I/F TRANSCEIVER - Tape and Reel 制造商:Analog Devices 功能描述:IC TRANSCEIVER RS485 |
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