IC-HX_17 Datasheet, PDF (2/14 Pages) IC-Haus GmbH – 3-CHANNEL DIFFERENTIAL COLD LINE DRIVER

iC-HX
3-CHANNEL DIFFERENTIAL COLD LINE DRIVER
Rev D1, Page 2/14
DESCRIPTION
iC-HX is a fast line driver with six independent chan-
nels and integrated impedance adaptation for 30 to
140 Ω lines.
Channels are paired for differential 3-channel oper-
ation 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 200 mA from 24 V and are short-circuit-proof
and current-limited, shutting down with excessive tem-
perature. For bus applications the output stages can
be switched to high impedance using input ENA.
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 active
low. In addition, the device also monitors voltage dif-
ferences at the pins VB1, VB2 and VB3 and generates
an error signal if the absolute 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 out-
puts 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.
To reduce the dynamic power dissipation in applica-
tions with long lines the iC-HX uses the iC-xSwitch.
PACKAGING INFORMATION QFN28 to JEDEC Standard
PIN CONFIGURATION QFN28 5 x 5 mm²
28 27 26 25 24 23 22
1
21
2
20
3
19
4
iC−HX
18
5
code...
17
6
...
16
7
15
8 9 10 11 12 13 14
PIN FUNCTIONS
No. Name Function
1 E1 Input Channel 1
2 E2 Input Channel 2
3 E3 Input Channel 3
4 n.c.
5 E4 Input Channel 4
PIN FUNCTIONS
No. Name Function
6 E5 Input Channel 5
7 E6 Input Channel 6
8 VCC +5 V Supply
9 CXS6 Capacitor iC-xSwitch
10 TNER Error Input, low active
11 NER Error Output, active low
12 A6 Output Channel 6
13 GND4 Ground
14 VB3 +4.5 ... 40 V Power Supply
15 A5 Output Channel 5
16 GND3 Ground
17 A4 Output Channel 4
18 VB2 +4.5 ... 40 V Power Supply
19 A3 Output Channel 3
20 GND2 Ground
21 A2 Output Channel 2
22 VB1 +4.5 ... 40 V Power Supply
23 GND1 Ground
24 A1 Output Channel 1
25 NXS Enable iC-xSwitch, low active
26 ENA Enable Input, high active
27 CXS1 Capacitor iC-xSwitch
28 DIFF Differential Mode Input, high active
The pins VB1, VB2 and VB3 must be connected to the same driver supply voltage VB. The pins GND1, GND2,
GND3 and GND4 must be connected to GND. To improve heat dissipation, the thermal pad at the bottom of the
package should be joined to an extended copper area which must have GND potential.