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ST491A

Features: · LOW SUPPLY CURRENT: 5mA MAX· DESIGNED FOR RS485 INTERFACE APPLICATIONS· -7 TO 12 COMMON MODE INPUT VOLTAGE RANGE· 70mV TYPICAL INPUT HYSTERESIS· DESIGNED FOR 25Mbps OPERATION· OPERATE FROM SINGLE 5 SUPPLY· ±4kV ESD PROTECTION · CURRENT LIMITING AND THERMAL SHUTDOWN FOR DRIVER OVERLOAD ...

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SeekIC No. : 004506534 Detail

ST491A: Features: · LOW SUPPLY CURRENT: 5mA MAX· DESIGNED FOR RS485 INTERFACE APPLICATIONS· -7 TO 12 COMMON MODE INPUT VOLTAGE RANGE· 70mV TYPICAL INPUT HYSTERESIS· DESIGNED FOR 25Mbps OPERATION· OPERATE FR...

ST491A Data Sheet

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Part Number:
ST491A
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/4

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Product Details

Description



Features:

·  LOW SUPPLY CURRENT: 5mA MAX
·  DESIGNED FOR RS485 INTERFACE APPLICATIONS
·  -7 TO 12 COMMON MODE INPUT VOLTAGE RANGE
·  70mV TYPICAL INPUT HYSTERESIS
·  DESIGNED FOR 25Mbps OPERATION
·  OPERATE FROM SINGLE 5 SUPPLY
·  ±4kV ESD PROTECTION
·  CURRENT LIMITING AND THERMAL SHUTDOWN FOR DRIVER OVERLOAD PROTECTION


Pinout

Connection Diagram


Specifications

Symbol Parameter
Value
Unit
VCC Supply Voltage
7
V
VDI Control Input Voltage
-0.5 to 7
V
VY,VZ Driver Output Voltage
-7.5 to 12.5
V
VA,VB Receiver Input Voltage
-7.5 to 12.5
V
VRO Receiver Output Voltage
-0.3 to (VCC + 0.3)
V
ESD Human Boby Model
3.5
kV

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


Description

The ST491A is a low power transceiver for RS-485 and RS-422 communications. The device contains one driver and one receiver in full duplex configuration. The ST491A draws 5mA (typ.) of supply current when unloaded and operates from a single 5V supply.

ST491A 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 receiver input has a fail-safe feature that guarantees a logic high output if both inputs are open circuit.




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