3-CHANNEL LINE DRIVER - iC-Haus
Description
iC-WE
3-CHANNEL 75 Ω LINE DRIVER
FEATURES
Ë 3 current-limited and short-circuit-proof push-pull drivers Ë Built-in adaption to 75 Ω characteristic impedance Ë High driver current of 300 mA at 24 V typ.
Ë Low saturation voltage up to 30 mA load current Ë Short switching times and high slew rates by npn circuitry Ë Wide driver supply range VB = 4.
5 V to 30 V Ë Internal free-wheeling diodes to VB and GND Ë Schmitt trigger inputs with integrated pull-up current sources Ë Inputs compatible to TTL and CMOS Ë Inverting and non-inverting driver mode Ë Bus capability due to Tri-State switching Ë Compatible to EIA standard RS-422 Ë Thermal shutdown with hysteresis Ë Short-circuit-proof OC error output reports thermal shutdown
or undervoltage at VCC or VB Ë Driver disabled in case of fault Ë extended temperature range of up to 130 °C in
TSSOP20tp 4.
4 mm package
Rev D1, Page 1/10
APPLICATIONS Ë 24 V signal transfer Ë Line driver in PLC environment
PACKAGES
SO20
TSSOP20
thermal pad
SO16W
BLOCK DIAGRAM
Copyright © 2003, iC-Haus
10 TNER MODE
2 VCC
ERROR
12 VB
NER 3
8 TRI 9 INV
SO20
LOW VOLTAGE T.
SHUTDOWN
iC-WE
1 E1
A1 11
CHAN 1
20 E2
CHAN 2
A2 13
19 E3
CHAN 3
GND 4-7,14-17
A3 18
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ichaus.
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iC-WE
3-CHANNEL 75 Ω LINE DRIVER
Rev D1, Page 2/10
DESCRIPTION
The iC-WE is a high-speed monolithic line driver circuit for three independent channels with built-in characteristic impedance adaption for 75Ω lines.
The push-pull outputs are designed for a high driver power of typ.
300mA at 24V.
They are current-limited and short-circuit protected by thermal shut-down at overtemperature.
Clamp diodes to VB and to GND protect the IC outputs against echoes of mismatched lines and against damage due to ESD according to MIL-STD-883.
All inputs are Schmitt triggers and contain current sources from the 5V supply VCC which select a defined High Level without external wiring.
Clamp diodes to VCC and to GND furnish ESD protection.
Using the INVert input it is possible to swit...
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