ADM3072EARZ-REEL7

3.3 V ， 【 15千伏ESD保护，半双工和全双工， RS - 485 / RS -422收发器 3.3 V, 【15 kV ESD-Protected, Half- and Full-Duplex, RS-485/RS-422 Transceivers

Product Details

The ADM3070E–ADM3078E are 3.3V, low power data transceivers with ±15kV ESD protection suitable for full and half duplex communication on multipoint bus transmission lines. They are designed for balanced data transmission and comply with TIA/EIA standards RS-485 and RS-422. The devices have a 1/8 unit load receiver input impedance which allows up to 256 transceivers on a bus. Since only one driver should be enabled at any time, the output of a disabled or powered down driver is three-stated to avoid overloading the bus.

The receiver inputs have a true failsafe feature which eliminates the need for external bias resistors and ensures a logic high output level when the inputs are open or shorted. This guarantees that the receiver outputs are in a known state before communication begins and when communication ceases.

The ADM307xE are 3.3 V, low power data transceivers with ±15 kV ESD protection suitable for full- and half-duplex communication on multipoint bus transmission lines. They are designed for balanced data transmission, and they comply with TIA/EIA standards: RS-485 and RS-422.

The devices have a ⅛ unit load receiver input impedance, which allows up to 256 transceivers on a bus. Because only one driver should be enabled at any time, the output of a disabled or powered-down driver is tristated to avoid overloading the bus.

The receiver inputs have a true fail-safe feature, which eliminates the need for external bias resistors and ensures a logic high output level when the inputs are open or shorted. This guarantees that the receiver outputs are in a known state before communication begins and when communication ceases.

**Applications**

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Power/energy metering

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Industrial control

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Lighting systems

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Telecommunications

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Security systems

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Instrumentation

### Features and Benefits

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TIA/EIA RS-485/RS-422 compliant

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±15 kV ESD protection on RS-485 input/output pins

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Data rates

ADM3070E/ADM3071E/ADM3072E: 250 kbps 

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Half- and full-duplex options

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True fail-safe receiver inputs

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Up to 256 nodes on the bus

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−40°C to +125°C temperature option

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Hot-swap input structure on DE and RE pins

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Reduced slew rates for low EMI

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Low power shutdown current all except ADM3071E/ ADM3074E/ADM3077E

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Outputs high-Z when disabled or powered off

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See data sheet for addional features