Datasheet

Datasheet 5 Version 2.3, 2009-09-16
ISOFACE™
ISO1H801G
Pin Configuration and Functionality
1.2 Pin Functionality
VCC (Positive 5V logic supply)
The VCC supplies the input interface that is
galvanically isolated from the output driver stage. The
input interface can be supplied with 5V.
DIS (Output disable)
The high-side outputs OUT0...OUT7 can be
immediately switched off by means of the low active pin
DIS that is an asynchronous signal. The input registers
are also reset by the
DIS signal. The Output remains
switched off after low-high transition of
DIS signal, till
new information is written into the input register.
Current Sink to GNDCC.
CS (Chip select)
The system microcontroller selects the ISO1H801G by
means of the low active pin
CS to activate the parallel
interface. By connecting the
CS pin and WR pin to
ground the parallel direct control is activated. Current
Source to VCC.
WR (Parallel write)
In parallel mode data at the input pins (D0 ... D7) are
latched by means of the rising edge of the low active
signal
WR (write). Current Source to VCC.
D0 ... D7 (Data input bit0 ... bit7)
The present data can be latched on the rising edge of
the write signal
WR. D0 ... D7 control the corresponding
output channels OUT0 ...OUT7. By connecting CS and
WR to ground, the signals at D0 ... D7 directly control
the outputs. Current Sink to GNDCC.
GNDCC (Ground for VCC domain)
This pin acts as the ground reference for the input
interface that is supplied by VCC.
GNDbb (Output driver ground domain)
This pin acts as the ground reference for the output
driver that is supplied by Vbb.
OUT0 ... OUT7 (High side output channel 0 ... 7)
The output high side channels are internally connected
to Vbb and controlled by the corresponding data input
pins D0 ... D7 in parallel mode.
TAB (Vbb, Positive supply for output driver)
The heatslug is connected to the positive supply port of
the output interface.