Specifications

Technical Reference

Legislation and Compliance

Product Details

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Select all	Attribute	Value
	Brand	STMicroelectronics
	Product Type	RS485/RS422 Transceiver
	Logic Function	Transceiver
	IC Type	Line Transceiver IC
	Number of Channels	1
	Input Type	Differential
	Output Type	Differential
	Mount Type	Surface
	Package Type	SO
	Pin Count	8
	Minimum Supply Voltage	3V
	Maximum High Level Output Current	4mA
	Maximum Supply Voltage	3.6V
	Minimum Operating Temperature	-40°C
	Maximum Propagation Delay Time @ CL	50ns
	Maximum Low Level Output Current	4mA
	Maximum Operating Temperature	125°C
	Series	ST3485EI
	Length	5mm
	Height	1.75mm
	Width	6.2 mm
	Standards/Approvals	AEC Q001, AEC Q100, AEC Q002, IEC 61000-4-2, AEC Q003
	Automotive Standard	AEC-Q100, AEC-Q1, AEC-Q2, AEC-Q3
	Supply Current	2.2mA

	Select all
	Brand STMicroelectronics
	Product Type RS485/RS422 Transceiver
	Logic Function Transceiver
	IC Type Line Transceiver IC
	Number of Channels 1
	Input Type Differential
	Output Type Differential
	Mount Type Surface
	Package Type SO
	Pin Count 8
	Minimum Supply Voltage 3V
	Maximum High Level Output Current 4mA
	Maximum Supply Voltage 3.6V
	Minimum Operating Temperature -40°C
	Maximum Propagation Delay Time @ CL 50ns
	Maximum Low Level Output Current 4mA
	Maximum Operating Temperature 125°C
	Series ST3485EI
	Length 5mm
	Height 1.75mm
	Width 6.2 mm
	Standards/Approvals AEC Q001, AEC Q100, AEC Q002, IEC 61000-4-2, AEC Q003
	Automotive Standard AEC-Q100, AEC-Q1, AEC-Q2, AEC-Q3
	Supply Current 2.2mA

Datasheet ST3485EIDT

The ST3485EB/EC/EI/EIY device is ±15 kV ESD protected, 3.3 V low power transceiver for RS-485 and RS-422 communications. The device contains one driver and one receiver in half duplex configuration. The ST3485E device transmits and receives at a guaranteed data rate of at least 12 Mbps. All transmitter outputs and receiver inputs are protected to ±15 kV air discharge. The driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high impedance state.

ESD protection

±15 kV air discharge

±8 kV contact discharge

Operate from a single 3.3 V supply - no charge pump required

Interoperable with 5 V logic

1 μA low current shutdown mode max.

Guaranteed 12 Mbps data rate

-7 to 12 V common mode input voltage range

Half duplex versions available

Industry standard 75176 pinout

Current limiting and thermal shutdown for driver overload protection

Guaranteed high receiver output state for floating inputs with no signal present

Allow up to 64 transceivers on the bus

Available in SO8 package

STMicroelectronics 1-Channel RS485/RS422 Transceiver, Differential, 8-Pin SO

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