3-Channel Differential COLD Line Driver

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iC-HX is a fast line driver with six independent channels and integrated impedance adaptation for 30 to 140 Ω lines.

Channels are paired for differential 3-channel operation by a high signal at the DIFF input, providing differential output signals for the three inputs E1, E3 and E5. All inputs are compatible with CMOS and TTL levels.

The push-pull output stages have a driver power of typically 200mA from 24 V and are short-circuitproof and current-limited, shutting down with excessive temperature. For bus applications the output stages can be switched to high impedance using input ENA.

To reduce the dynamic power dissipation in applications with long lines the iC-HX uses the iC-xSwitch. iC-HX monitors supply voltages VB and VCC and the chip temperature, switching all output stages to high impedance in the event of error and set NER activ low. In addition, the device also monitors voltage differences at the pins VB1, VB2 and VB3 and generates an error signal if the absolut value exceeds 0.75 V.

The open-drain output NER allows the device to be wired-ORed to the relevant NER error outputs of other iC-HXs and iC-DLs. Via input TNER the message outputs of other ICs can be extended to generate system error messages. NER switches to high impedance if supply voltage VCC ceases to be applied.

The device is protected against ESD.

iC-Haus iC_HX_001


• Line drivers for 24 V control engineering
• Linear scales and encoders
• MR sensor systems

Symmetry Electronics (and its e-commerce division: SemiconductorStore.com) is an authorized iC-Haus distributor.


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6 current-limited and short-circuit-proof push-pull drivers
Differential 3-channel operation selectable
Integrated impedance adaption for 30 to 140 lines
Wide power supply range from 4 to 40 V
200mA output current (at VB = 24 V)
Low output saturation voltage (< 0.4 V at 30 mA)
Compatible with TIA/EIA standard RS-422
Tristate switching of outputs enables use in buses
Short switching times and high slew rates
Low static power dissipation
Dynamic power dissipation reduced with iC-xSwitch
Schmitt trigger inputs with pull-down resistors, TTL and CMOS compatible; voltage-proof up to 40 V
Thermal shutdown with hysteresis
Error message trigger input TNER
Open-drain error output NER, active low with excessive chip temperature and undervoltage at VCC or VB
Option: Extended temperature range from -40 to 125 C


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