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ST3485, ST3485E, ST3485EC

Table of contents:
Info of ST3485
Info of ST3485E
Info of ST3485EC

ST3485, ST3485E, ST3485EC Selling Leads, Datasheet

MFG:ST Package Cooled:sop8 D/C:06+

ST3485, ST3485E, ST3485EC Datasheet download

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Part Number: ST3485

MFG: ST

Package Cooled: sop8

D/C: 06+

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ST3485E General Description

The ST3485E is ±15kV ESD protected, 3.3V low power transceiver for RS-485 and RS-422 communications. The device contains one driver and one receiver in half duplex configuration. The ST3485E transmit and receive at guaranteed data rate at least to 12Mbps.

All transmitter outputs and receiver inputs are protected to ±15kV using Human Body Model. Driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdown circuitry that place the driver outputs into a high-impedance state.

The ST3485E input has a true fail-safe feature that guarantees a logic high output if both inputs are open circuit, shorted together or in presence of the termination with no signal on the bus.

ST3485E Maximum Ratings

Symbol	Parameter	Value	Unit
V_CC	Supply Voltage	7	V
V_I	Control Input Voltage (RE, DE)	-0.3 to 7	V
V_DI	Driver Input Voltage (DI)	-0.3 to 7	V
V_DO	Driver Output Voltage (A, B)	-7.5 to 12.5	V
V_RI	Receiver Input Voltage (A, B)	-7.5 to 12.5	V
V_RO	Receiver Output Voltage (RO)	-0.3 to (V_CC + 0.3)	V

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.

ST3485E Features

· ESD PROTECTION:
   ±15KV HUMAN BODY MODEL
   ±8KV IEC 1000-4-2 CONTACT DISCHARGE
· OPERATE FROM A SINGLE 3.3V SUPPLY -NO CHARGE PUMP REQUIRED
· INTEROPERABLE WITH 5V LOGIC
· 1mA LOW CURRENT SHUTDOWN MODE MAX
· GUARANTEED 12 Mbps DATA RATE
· -7 TO 12 COMMON MODE INPUT VOLTAGE RANGE
· HALF DUPLEX VERSIONS AVAILABLE
· INDUSTRY STANDARD 75176 PINOUT
· CURRENT LIMITING AND THERMAL
   SHUTDOWN FOR DRIVER OVERLOAD
· GUARANTEED HIGH RECEIVER OUTPUT
   STATE FOR FLOATING INPUTS WITH NO SIGNAL PRESENT
· ALLOW UP TO 64 TRANSCEIVERS ON THE BUS

ST3485E Connection Diagram

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