SP334ET Programmable IC Chips , Ic Chip Programming RS-232 / RS -485 Transceiver

SP334ET Programmable IC Chips , Ic Chip Programming RS-232 / RS -485 Transceiver

SP334

Programmable RS-232/RS-485 Transceiver

■ +5V Only Operation

■ Software Programmable RS-232 or RS- 485 Selection

■ Three RS-232 Drivers and Five Receivers in RS-232 Mode

■ Two RS-485 Full-Duplex Transceivers in RS-485 Mode

■ Full Differential Driver Tri-State (Hi-Z) Control

■ Receiver Output Tri-State Control

DESCRIPTION…

The SP334 is a programmable RS-232 and/or RS-485 transceiver IC. The SP334 contains three drivers and five receivers when selected in RS-232 mode; and two drivers and two receivers when selected in RS-485 mode.

The RS-232 transceivers can typically operate at 230kbps while adhering to the RS-232 specifications. The RS-485 transceivers can operate up to 10Mbps while adhering to the RS-485 specifications. The RS-485 drivers can be disabled (High-Z output) by the TXEN enable pin. The RS-232 and RS-485 receiver outputs can be disabled by the RXEN enable pin.

ABSOLUTE MAXIMUM RATINGS

These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.

VCC...........................................................................+7V

Storage Temperature..........................-65˚C to +150˚C

Power Dissipation 28-pin Plastic DIP...........................1000mW

                            28-pin Plastic SOIC.......................1000mW

Package Derating:

    28-pin Plastic DIP ø_JA....................................................40 °C/W

    28-pin Plastic SOIC ø_JA....................................................40 °C/W

TEST CIRCUITS

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