TLE8108EM Datasheet, PDF (10/30 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
Electrical and functional Description of the Device
The TLE8108EM is a 8-Channel Low Side Relay Switch.
The power stages are composed of n-MOSFET transistors.
5.1
Functional Description of Supply and Input Pins
5.1.1 Power Supply and Reset
The TLE8108EM is supplied by a single power supply line V_DD with two input pins which must be connected
together. After power supply start-up, the input registers of the device are programmed to OFF mode for all
channels. The output registers must be reset to their default values by programming the Clear mode for all
channels once.
Capacitors at the supply pins V_DD to GND are recommended.
There is a reset pin available. Low level at this pin causes all registers to be set to their default values and the
quiescent supply currents are minimized. This is also true for the Standby Mode in case all channels are
programmed to Clear. Figure 4 shows the timing requirements for the RST pin to be enabled and for the device
to wake up.
RST
t_RST
DEVICE
STATUS
READY
Figure 4 Reset Timings
t_WU
NOT READY
READY
t
t
Reset Timing.vsd
Data Sheet
10
Rev. 1.0, 2011-03-23