The ADM3493 is a low power, differential line transceiver designed to operate using a single 3.3 V power supply. Low power consumption, coupled with a shutdown mode, makes it ideal for power-sensitive applications. The ADM3493 is suitable for communication on multipoint bus transmission lines.

The device contains one driver and one receiver. Designed for half-duplex communication, the ADM3493 features a slew rate limited driver that minimizes EMI and reduces reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250 kbps.

The receiver input impedance is 96 kΩ, allowing up to 256 transceivers to be connected on the bus. A thermal shutdown circuit prevents excessive power dissipation caused by bus contention or by output shorting. If a significant temperature increase is detected in the internal driver circuitry during fault conditions then the thermal shutdown circuit forces the driver output into a high impedance state. The receiver contains a fail-safe feature that results in a logic high output state, if the inputs are unconnected (floating).

The ADM3493 is fully specified over the commercial and industrial temperature ranges and is available in an 8-lead SOIC.

Part#	Protocols	Data Rate	#Tx	# Rx	Pos Supply	Supply Current (max)	15 kV ESD	Low Pwr Shutdown	Product Description	Price* (1000-4999)
ADM3251E	RS-232	460kbps	1	1	+4.5 to +5.5	110mA	Yes	No	Isolated Single Channel, RS-232 Line Driver/Receiver	$2.99
ADM4850	RS-422, RS-485	115kbps	1	1	+4.75 to +5.25	160µA	No	Yes	5V, Slew Rate Limited, Half-Duplex, RS-485/RS-422 Transceivers	$0.71
ADM4854	RS-422, RS-485	115kbps	1	1	+4.75 to +5.25	160µA	No	No	5V, Slew Rate Limited, Full-Duplex, RS-485/RS-422 Transceivers	$0.71
ADM560	RS-232	116kbps	4	5	+3 to +3.6	5mA	No	Yes	Ultralow Power, +3.3V, RS-232 Notebook PC Serial Port Drivers/Receivers	$2.41
ADM561	RS-232	116kbps	4	5	+3 to +3.6	5mA	No	Yes	Ultralow Power, +3.3V, RS-232 Notebook PC Serial Port Drivers/Receivers	$2.41
ADM232L	RS-232	120kbps	2	2	+4.5 to +5.5	13mA	No	No	+5V Powered, CMOS RS-232 Drivers/Receivers	$1.27
ADM233L	RS-232	120kbps	2	2	+4.75 to +5.25	13mA	No	No	+5V Powered CMOS RS-232 Drivers/Receivers	$2.79
ADM202	RS-232	120kbps	2	2	+4.5 to +5.5	6mA	No	No	High Speed, +5V, 0.1 µF CMOS RS-232 Driver/Receivers	$1.27
ADM203	RS-232	120kbps	2	2	+4.5 to +5.5	6mA	No	No	High Speed, +5V, 0.1 µF CMOS RS-232 Driver/Receiver	$2.79
ADM231L	RS-232	120kbps	2	2	+4.5 to +5.5	13mA	No	No	+5V & +12V Powered, CMOS RS-232 Driver/Receiver	$1.21
ADM209	RS-232	120kbps	3	5	+4.5 to +5.5	1mA	No	No	0.1 µF, +5V & +12V Powered CMOS RS-232 Driver/Receiver	$2.53
ADM239L	RS-232	120kbps	3	5	+4.5 to +5.5	13mA	No	No	+5V & +12V Powered, CMOS RS-232 Drivers/Receivers	$2.31
ADM206	RS-232	120kbps	4	3	+4.5 to +5.5	7mA	No	Yes	0.1 µF, +5V Powered CMOS RS-232 Driver/Receiver	$2.31
ADM208	RS-232	120kbps	4	4	+4.5 to +5.5	9mA	No	No	0.1 µF, +5V Powered CMOS RS-232 Driver/Receiver	$2.40
ADM211	RS-232	120kbps	4	5	+4.5 to +5.5	7mA	No	Yes	0.1 µF, +5V Powered CMOS RS-232 Driver/Receiver	$1.94
ADM213	RS-232	120kbps	4	5	+4.5 to +5.5	7mA	No	Yes	0.1 µF, +5V Powered CMOS RS-232 Driver/Receiver	$2.40
ADM236L	RS-232	120kbps	4	3	+4.5 to +5.5	103mA	No	Yes	+5V Powered CMOS RS-232 Drivers/Receivers	$2.31
ADM238L	RS-232	120kbps	4	4	+4.5 to +5.5	13mA	No	No	+5V Powered CMOS RS-232 Drivers/Receivers	$2.40
ADM241L	RS-232	120kbps	4	5	+4.5 to +5.5	13mA	No	Yes	5 V Powered CMOS RS-232 Interface Line Drivers/Receivers	$2.31
ADM207	RS-232	120kbps	5	3	+4.5 to +5.5	9mA	No	No	0.1 µF, +5V Powered CMOS RS-232 Driver/Receiver	$2.40
ADM237L	RS-232	120kbps	5	3	+4.75 to +5.25	13mA	No	No	+5V Powered CMOS RS-232 Drivers/Receivers	$2.31
ADM222	RS-232	200kbps	2	2	+4.5 to +5.5	8mA	No	Yes	High Speed, +5V, 0.1 µF CMOS RS-232 Driver/Receiver	$1.58
ADM232A	RS-232	200kbps	2	2	+4.5 to +5.5	8mA	No	No	High Speed, +5V, 0.1 µF CMOS RS-232 Driver/Receivers	$1.58
ADM242	RS-232	200kbps	2	2	+4.5 to +5.5	8mA	No	Yes	High Speed, +5V, 0.1 µF, CMOS RS-232 Interface Line Driver/Receivers	$1.58
ADM1181A	RS-232	230kbps	2	2	+4.5 to +5.5	6mA	Yes	No	EMI/EMC-Compliant, ±15 kV, ESD Protected, RS-232 Line Drivers/Receivers	$1.42
ADM202E	RS-232	230kbps	2	2	+4.5 to +5.5	6mA	Yes	No	EMI/EMC-Compliant, ±15 kV ESD Protected, RS-232 Line Driver/Receiver	$1.48
ADM206E	RS-232	230kbps	4	3	+4.5 to +5.5	13mA	Yes	Yes	EMI/EMC Compliant, ±15kV Protected, RS-232 Line Driver/Receiver	$2.23
ADM208E	RS-232	230kbps	4	4	+4.5 to +5.5	13mA	Yes	No	EMI/EMC Compliant, ±15kV Protected, RS-232 Line Driver/Receiver	$2.23
ADM211E	RS-232	230kbps	4	5	+4.5 to +5.5	13mA	Yes	Yes	EMI/EMC Compliant, ±15kV Protected, RS-232 Line Driver/Receiver	$2.32
ADM213E	RS-232	230kbps	4	5	+4.5 to +5.5	13mA	Yes	Yes	EMI/EMC Compliant, ±15kV Protected, RS-232 Line Driver/Receiver	$2.32
ADM207E	RS-232	230kbps	5	3	+4.5 to +5.5	13mA	Yes	No	EMI/EMC Compliant, ±15kV Protected, RS-232 Line Driver/Receiver	$2.32
ADM3070E	RS-422, RS-485	250kbps	1	1	+3 to +3.6	1.5mA	Yes	Yes	3.3V, ±15kV ESD, Full-Duplex, 250kbps, RS-422/485 Transceiver w/ Drvr/Rcvr Output-Enable Inputs	$1.62
ADM3071E	RS-422, RS-485	250kbps	1	1	+3 to +3.6	1.5mA	Yes	No	3.3V, ±15kV ESD, 250kbps, Full Duplex Interface Transceiver	$1.57
ADM3072E	RS-422, RS-485	250kbps	1	1	+3 to +3.6	1.5mA	Yes	Yes	3.3V, ±15kV ESD, Half-Duplex, 250kbps Transceiver w/ Driver/Receiver Enable Inputs	$1.52
ADM3483E	RS-422, RS-485	250kbps	1	1	+3 to +3.6	2.2mA	Yes	Yes	3.3 V, ±15 kV ESD-Protected, 250kbps Half-Duplex, RS-485/RS-422 Transceiver	$1.32
ADM3488E	RS-422, RS-485	250kbps	1	1	+3 to +3.6	2.2mA	Yes	No	3.3 V, ±15 kV ESD-Protected, 250kbps Full-Duplex, RS-485/RS-422 Transceiver	$1.32
ADM487E	RS-422, RS-485	250kbps	1	1	+4.75 to +5.25	400µA	Yes	Yes	5 V, 128 Nodes, ±15 kV ESD-Protected, 250kbps Half-Duplex Transceiver	$1.32
ADM3488	RS-422, RS-485	250kbps	1	1	+3 to +3.6	2.2mA	No	No	RS-422/485, 3.3 V Slew - Rate Limited, Full Duplex Low Power Transceiver	$0.91
ADM3493	RS-422, RS-485	250kbps	1	1	+3 to +3.6	2.2mA	No	Yes	3.3 V Slew Rate Limited, Half Duplex RS-485/RS-422 Transceiver	$0.96
ADM3483	RS-422, RS-485	250kbps	1	1	+3 to +3.6	2.2mA	No	Yes	3.3 V, 250 kbps, slew rate Limited, Half-Duplex, RS-485/RS-422 Transceiver	$0.91
ADM483	RS-422, RS-485	250kbps	1	1	+4.75 to +5.25	650µA	No	Yes	5 V, Low Power, Slew-Rate Limited, RS-485/RS-422 Transceiver	$0.67
ADM483E	RS-422, RS-485	250kbps	1	1	+4.5 to +5.5	10µA	Yes	Yes	±15 kV ESD Protected, EMC Compliant, Slew Rate Limited, EIA RS-485 Transceiver	$1.27
ADM488	RS-422, RS-485	250kbps	1	1	+4.5 to +5.5	74µA	No	No	Full-Duplex, Low Power, Slew Rate Limited, EIA RS-485 Transceiver	$1.11
ADM489	RS-422, RS-485	250kbps	1	1	+4.5 to +5.5	74µA	No	No	Full-Duplex, Low Power, Slew Rate Limited, EIA RS-485 Transceiver w/ Rcvr & Drvr enables	$1.62
ADM3101E	RS-232	460kbps	1	1	+3 to +5.5	5mA	Yes	No	3.3 V, Single Channel RS-232 Line Driver/Receiver	$0.85
ADM101E	RS-232	460kbps	1	1	+4.5 to +5.5	1mA	Yes	Yes	Craft Port™, Tiny RS-232 Transceiver for Portable Applications	$0.78
ADM3232E	RS-232	460kbps	2	2	+3 to +5.5	3mA	Yes	No	±15 kV ESD Protected, 3.3 V, RS-232 Line Driver/Receiver	$1.37
ADM1385	RS-232	460kbps	2	2	+3 to +3.6	2.1mA	No	Yes	High-Speed, 2-Channel RS-232/V.28 Interface Transceiver	$1.42
ADM3202	RS-232	460kbps	2	2	+3 to +5.5	3mA	Yes	No	High-Speed, Low Power, 2-Channel RS-232/V.28 Interface Line Driver/Receiver	$1.37
ADM3222	RS-232	460kbps	2	2	+3 to +3.6	2.1mA	No	Yes	High-Speed, 2-Channel, RS-232/V.28 Interface Devices	$1.37
ADM3311E	RS-232	460kbps	3	5	+2.7 to +3.6	1µA	Yes	Yes	15 kV ESD Protected, 2.7V to 3.6V, Serial Port Transceivers with Green Idle™	$1.72
ADM3312E	RS-232	460kbps	3	3	+2.7 to +3.6	1µA	Yes	Yes	15 kV ESD Protected, 2.7V to 3.6V, Serial Port Transceivers with Green Idle™	$1.47
ADM3315E	RS-232	460kbps	3	3	+2.7 to +3.6	0.85mA	Yes	Yes	15 kV ESD Protected, 2.7V to 3.6V, Serial Port Transceivers with Green Idle™	$1.52
ADM3310E	RS-232	460kbps	3	5	+2.7 to +3.6	0.85µA	Yes	Yes	15 kV ESD Protected, 2.7V to 3.6V, Serial Port Transceivers with Green Idle™	$1.52
ADM3073E	RS-422, RS-485	500kbps	1	1	+3 to +3.6	1.5mA	Yes	Yes	3.3V, ±15kV ESD, Full-Duplex, 500kbps Interface-Transceiver w/ Driver/Receiver Enable Input	$1.62
ADM3074E	RS-422, RS-485	500kbps	1	1	+3 to +3.6	1.5mA	Yes	No	3.3V, ±15kV ESD, Full-Duplex, 500 kbps Interface Transceiver	$1.52
ADM3075E	RS-422, RS-485	500kbps	1	1	+3 to +3.6	1.5mA	Yes	Yes	3.3V, ±15kV ESD, Half-Duplex, 500kbps Interface Transceiver w/ Driver/Receiver Enable Inputs	$1.52
ADM2483	RS-485	500kbps	1	1	+2.7 to +5.5	2.5mA	No	No	iCoupler® Galvanically Isolated, Slew Rate Limited RS-485 Transceiver w/ fail safe and thermal shutd	$3.04
ADM4851	RS-422, RS-485	500kbps	1	1	+4.75 to +5.25	200µA	No	Yes	5V, Slew Rate Limited, Half-Duplex, RS-485/RS-422 Transceiver	$0.71
ADM4855	RS-422, RS-485	500kbps	1	1	+4.75 to +5.25	200µA	No	No	5V, Slew Rate Limited, Full-Duplex, RS-485/RS-422 Transceivers	$0.71
ADM2209E	RS-232	920kbps	6	10	+10.8 to +13.2	5mA	Yes	Yes	EMI-/EMC-Compliant, ±15 kV ESD Protected, Dual RS-232 Port w/ Low Power Standby Mode	$2.78
ADM3307E	RS-232	1Mbps	5	3	+2.7 to +3.6	1µA	Yes	Yes	15 kV ESD Protected, 2.7V to 3.6V, Serial Port Transceivers with Green Idle™	$1.47
ADM1487E	RS-422, RS-485	2.5Mbps	1	1	+4.75 to +5.25	500µA	Yes	No	5 V, 128 Nodes, ±15 kV ESD-Protected, 2.5Mbps Half-Duplex Transceiver	$1.32
ADM3486E	RS-422, RS-485	2.5Mbps	1	1	+3 to +3.6	2.2mA	Yes	Yes	3.3 V, ±15 kV ESD, Half-Duplex, 2.5 Mbps RS-422/485 Transceiver w/ Xmit/Rcvr Output Enable Inputs	$1.32
ADM485E	RS-422, RS-485	2.5Mbps	1	1	+4.75 to +5.25	900µA	Yes	No	5 V, 32 Nodes, ±15 kV ESD-Protected, 2.5Mbps Half-Duplex Transceiver	$1.32
ADM4852	RS-422, RS-485	2.5Mbps	1	1	+4.75 to +5.25	500µA	No	Yes	5V, Slew Rate Limited, Half-Duplex, RS-485/RS-422 Transceivers	$0.71
ADM4856	RS-422, RS-485	2.5Mbps	1	1	+4.75 to +5.25	500µA	No	No	5V, Slew Rate Limited, Full-Duplex, RS-485/RS-422 Transceivers	$0.71
ADM485	RS-422, RS-485	5Mbps	1	1	+4.75 to +5.25	2.2mA	No	No	5 V, Low Power, EIA RS-485 Transceiver	$1.31
AD7306	RS-232, RS-422	5Mbps	3	2	+4.75 to +5.25	15mA	No	No	+5 V Powered RS-232/RS-422 Interface Transceiver	$7.79
ADM3490	RS-422, RS-485	10Mbps	1	1	+3 to +3.6	2.2mA	No	No	RS-422/485, 3.3 V, Full - Duplex, Low Power Transceiver	$1.01
ADM3485	RS-422, RS-485	10Mbps	1	1	+3 to +3.6	2.2mA	No	Yes	3.3 V, 10 Mbps, Half-Duplex, RS-485/RS-422 Transceiver	$1.01
ADM4853	RS-422, RS-485	10Mbps	1	1	+4.75 to +5.25	500µA	No	Yes	5V, Slew Rate Limited, Half-Duplex, RS-485/RS-422 Transceivers	$0.71
ADM4857	RS-422, RS-485	10Mbps	1	1	+4.75 to +5.25	500µA	No	No	5V, Slew Rate Limited, Full-Duplex, RS-485/RS-422 Transceivers	$0.71
ADM3491	RS-422, RS-485	10Mbps	1	1	+3 to +3.6	1µA	No	Yes	Full Duplex, 840uA, 10Mbps, EIA RS-485 Transceiver	$1.37
ADM3490E	RS-422, RS-485	12Mbps	1	1	+3 to +3.6	2.2mA	Yes	No	3.3 V, ±15 kV ESD, Full-Duplex 12 Mbps RS-422/485 Transceiver	$1.37
ADM3491E	RS-422, RS-485	12Mbps	1	1	+3 to +3.6	2.2mA	Yes	Yes	3.3 V, ±15 kV ESD, Full-Duplex 12 Mbps RS-422/485 Transceiver w/ Drvr/Rcvr Enable Inputs	$1.42
ADM3485E	RS-422, RS-485	12Mbps	1	1	+3 to +3.6	2.2mA	No	Yes	ESD Protected, EMC Compliant, 3.3V, 12 Mbps, EIA RS-485 Transceiver	$1.32
ADM2485	RS-422, RS-485	16Mbps	1	1	+2.7 to +5.5	-	No	No	ADM2485 - High Speed Isolated RS-485/RS-422 Transceiver with Integrated Transformer Driver	$5.57
ADM3076E	RS-422, RS-485	16Mbps	1	1	+3 to +3.6	1.5mA	Yes	Yes	3.3V, ±15kV ESD, Full-Duplex, 16 Mbps Interface Transceiver w/ Driver/Receiver Enable Inputs	$1.62
ADM3077E	RS-422, RS-485	16Mbps	1	1	+3 to +3.6	1.5mA	Yes	No	3.3V ±15kV ESD Protected Full Duplex Transceiver w/16Mbps	$1.57
ADM3078E	RS-422, RS-485	16Mbps	1	1	+3 to +3.6	1.5mA	Yes	Yes	3.3V ±15kV ESD Protected Half Duplex Driver/Receiver Enable Transceiver w/16Mbps	$1.55
ADM2490E	RS-422, RS-485	16Mbps	1	1	+2.7 to +5.5	4mA	No	No	High Speed, ESD Protected, Full-Duplex iCoupler® Isolated RS-485 Transceiver	$4.55
ADM2486	RS-485	20Mbps	1	1	+2.7 to +5.5	n/a	No	No	iCoupler® High Speed, Galvanically Isolated RS-485 Transceiver	$5.04
ADM1485	RS-422, RS-485	30Mbps	1	1	+4.75 to +5.25	2.2mA	No	No	5 V Low, Power EIA/RS-485 Transceiver	$1.63
ADM1486	RS-422, RS-485	30Mbps	1	1	+4.75 to +5.25	2mA	No	No	5 V, 0.8mA PROFIBUS, RS-485 Interface Transceiver	$2.07

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

The model number is a specific version of a generic that can be purchased or sampled.

Status indicates the current lifecycle of the product. This can be one of 4 stages:

• Pre-Release: The model has not been released to general production, but samples may be available.
• Production: The model is currently being produced, and generally available for purchase and sampling.
• Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
• Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).

The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

This is the acceptable operating range of the device. The various ranges specified are as follows:

• Commercial: 0 to +70 degrees Celsius
• Military : -55 to +125 degrees Celsius
• Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
• Automotive: -40 to +125 degrees Celsius

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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