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Description
+5 V Low Power EIA RS-485 Transceiver
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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.
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)
Preview of the first 3 pages of the data sheet
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282 buyer reviews from Canada
Sarah Hall
Length of registration:7 years
This integrated circuit has been a great addition to my project. It has been easy to use and has provided reliable performance. The ADM485ARZ has been a great choice for my application and I would highly recommend it to anyone looking for a reliable and cost-effective integrated circuit.
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03/17/2023
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All UTSOURCE purchases have a 60 days money back return policy, plus a 90 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.
ADM485ARZ
ADM485ARZ has several brands around the world that may have alternate names for ADM485ARZ due to regional differences or acquisition. ADM485ARZ may also be known as the following names:
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Stock Status: 10000
Minimum: 2
Total Price:
Unit Price:1.83883
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