IC-HD2 Datasheet, PDF (2/8 Pages) IC-Haus GmbH – QUAD DIFFERENTIAL LINE DRIVER

iC-HD2
QUAD DIFFERENTIAL LINE DRIVER
Rev A5, Page 2/8
DESCRIPTION
iC-HD is a robust line driver for industrial 5 V and 24 V
applications with four complementary output chan-
nels.
The driver stage inputs have a Schmitt trigger char-
acteristic and are compatible with CMOS and TTL
levels.
For signal lines with a characteristic impedance of
30 to 140 Ω the integrated line adapter, optimized
to 75 Ω, minimizes ringing effects which arise when
there is no line termination.
The device recognizes undervoltage at voltage regu-
lator output VREF and thus indirectly also at supply
voltage VB. VREF acts as a 5 V voltage supply for
external loads of up to 5 mA.
At a supply of 24 V the push-pull driver stages typi-
cally provide 200 mA to discharge the line and also
have a low saturation voltage (of typically 200 mV
with a 40 mA low-side load). The outputs are current
limited and short-circuit-proof, shutting down with ex-
cessive temperature.
For bus applications the driver stages can be
switched to high impedance by a high at input NEN.
Excessive temperature and undervoltage are sig-
naled as an error by a low signal at the short-circuit-
proof NERR output. For test purposes the tempera-
ture monitor can be deactivated by applying a voltage
of greater than 12 V to input NEN.
The iC-HD contains internal ESD protection circuitry.
PACKAGES TSSOP20
PIN CONFIGURATION TSSOP20
1
I1
2
GND1
3
O1
4
NO1
5
VREF
6
NO2
7
O2
8
nc
9
I2
10
NERR
20
VB
19
I4
18
nc
17
O4
16
NO4
15
NEN
14
NO3
13
O3
12
GND2
11
I3
The pins GND1, GND2 must be connected to ground.
PIN FUNCTIONS
No. Name Function
1 I1 Input 1
2 GND1 Ground
3 O1 Driver Output 1
4 NO1 Inverted Driver Output 1
5 VREF Voltage Regulator Output +5 V (5 mA)
6 NO2 Inverted Driver Output 2
7 O2 Driver Output 2
8 nc
9 I2 Input 2
10 NERR Error Message Output (low active)
11 I3 Input 3
12 GND2 Ground
13 O3 Driver Output 3
14 NO3 Inverted Driver Output 3
15 NEN Function Input
(low signal enables driver outputs)
16 NO4 Inverted Driver Output 4
17 O4 Driver Output 4
18 nc
19 I4 Input 4
20 VB +4.5 to +35 V Supply Voltage