ADM3486E Series

3.3 V, ±15 kV ESD-Protected, RS-485/RS-422 Transceiver (Half Duplex, 2.5 Mbps, DE/RE)

Catalog

3.3 V, ±15 kV ESD-Protected, RS-485/RS-422 Transceiver (Half Duplex, 2.5 Mbps, DE/RE)

Part	Package / Case	Package / Case [y]	Package / Case [x]	Duplex	Protocol	Receiver Hysteresis	Mounting Type	Supplier Device Package	Type	Data Rate	Voltage - Supply [Max]	Voltage - Supply [Min]	Operating Temperature [Max]	Operating Temperature [Min]
Analog Devices ADM3486EARZ	8-SOIC	3.9 mm	0.154 in	Half	RS422 RS485	50 mV	Surface Mount	8-SOIC	Transceiver	2.5 Mbps	3.6 V	3 V	85 °C	-40 °C

Catalog

3.3 V, ±15 kV ESD-Protected, RS-485/RS-422 Transceiver (Half Duplex, 2.5 Mbps, DE/RE)

Key Features

• TIA/EIA RS-485/RS-422 compliant

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

• Data rates - ADM3486E: 2.5 Mbps

• Half duplex

• Receiver open-circuit, fail-safe design

• Low Power shutdown current

• 32 nodes on the bus

• Outputs high-Z when disabled or powered off

• −7 V to +12 V common-mode input range

• Thermal shutdown and short-circuit protection

• Industry-standard 75176 pinout

• 8-lead SOIC package

Description

TheADM3483E/ ADM3486E /ADM3488E/ADM3490E/ADM3491Eare 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 comply with TIA/EIA standards RS-485 and RS-422. The ADM3483E / ADM3486E are half-duplex transceiver that shares differential lines and has separate enable inputs for the driver and receiver. The full-duplex ADM3488E / ADM3490E / ADM3491E transceivers have dedicated differential line driver outputs and receiver inputs. The ADM3491E also features enable inputs for the driver and receiver.The devices have a 12 kΩ receiver input impedance which allows up to 32 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 driver outputs of the ADM3483E / ADM3486E / ADM3488E are slew rate limited, in order to reduce EMI and data errors caused by reflections from improperly terminated buses. The receiver has a fail-safe feature that ensures a logic high output when the inputs are floating.Excessive power dissipation caused by bus contention or by output shorting is prevented with a thermal shutdown circuit. The parts are fully specified over the commercial and industrial temperature ranges and are available in narrow 8-lead and 14-lead (ADM3491E) SOIC packages.