TLE8108EM Datasheet, PDF (11/30 Pages) Infineon Technologies AG – Smart 8-Channel Low Side Relay Driver with SPI Interface

TLE 8108 EM
Smart 8-Channel Low Side Switch
Electrical and functional Description of the Device
5.1.2 Switching Inputs IN1 to IN4
There are four input pins available at TLE8108EM, which can be configured to be used for control of the output
stages. The SPI INn parameter selects the input pin to be used. Figure 5 shows the input circuit of TLE8108EM.
IN4
IN3
IN2
IN1
I_IN1
OFF
ON
CLR/STB
CLR/STB
CHANNEL 4
CHANNEL 3
CHANNEL 2
CHANNEL 1
DMOS
IN1
RST
RST
OFF
ON
CLR/STB
CLR/STB
CHANNEL 8
CHANNEL 7
CHANNEL 6
CHANNEL 5
DMOS
IN5
RST
Input Logic.vsd
Figure 5 Input Matrix and Logic
The current sink to ground ensures that the channels switch off in case of an open input pin. The zener diode
protects the input circuit against ESD pulses. After power-on reset or after an external reset the device enters the
OFF mode for all channels. During an external reset or a power-on reset, the output stages are set to Clear mode.
Data Sheet
11
Rev. 1.0, 2011-03-23