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AD7306

Analog Devices
Part Number AD7306
Manufacturer Analog Devices
Description +5 V Powered RS-232/RS-422 Transceiver
Published Mar 23, 2005
Detailed Description a FEATURES RS-232 and RS-422 on One Chip Single +5 V Supply 0.1 ␮ F Capacitors Short Circuit Protection Excellent Noise ...
Datasheet PDF File AD7306 PDF File

AD7306
AD7306


Overview
a FEATURES RS-232 and RS-422 on One Chip Single +5 V Supply 0.
1 ␮ F Capacitors Short Circuit Protection Excellent Noise Immunity Low Power BiCMOS Technology High Speed, Low Skew RS-422 Operation –40؇C to +85؇C Operations APPLICATIONS DTE-DCE Interface Packet Switching Local Area Networks Data Concentration Data Multiplexers Integrated Services Digital Network (ISDN) GENERAL DESCRIPTION +5 V Powered RS-232/RS-422 Transceiver AD7306 FUNCTIONAL BLOCK DIAGRAM V+ C1+ C1– R2 IN T1OUT T2OUT VCC R1 IN (B) R1 IN /R1 IN (A) T3OUT (B) T3OUT (A) NC 1 2 3 4 5 6 7 8 9 10 11 12 NC = NO CONNECT 24 23 22 21 20 V– C2– C2+ R2 OUT T1IN T2IN GND R1 OUT T3IN 232/422 SEL GND NC AD7306 SOIC TOP VIEW (Not to Scale) 19 18 17 16 15 14 13 The AD7306 line driver/receiver is a 5 V monolithic product which provides an interface between TTL signal levels and dual standard EIA RS-232/RS-422 signal levels.
The part contains two RS-232 drivers, one RS-422 driver, one RS-232 receiver, and one receiver path which can be configured either as RS-232 or as RS-422.
An internal charge pump voltage converter facilitates operation from a single +5 V power supply.
The internal charge pump generates ± 10 V levels allowing RS-232 output levels to be developed without the need for external bipolar power supplies.
A highly efficient charge pump design allows operation using non polarized, miniature 0.
1 µF capacitors.
This gives a considerable saving in printed circuit board space over conventional products which can use up to 10 µF capacitors.
The charge pump output voltages may also be used to power external circuitry which requires dual supplies.
The RS-232 channels are suitable for communications rates up to 100 kHz and the RS-422 channels are suitable for high speed communications up to 5 MHz.
The RS-422 transmitter complementary outputs are closely matched and feature low timing skew between the complementary outputs.
This is often an essential requirement to meet tight system timing specifications.
All ...



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