MCZ33975EK Freescale Semiconductor, MCZ33975EK Datasheet - Page 23

• Manufacturer Part Number: MCZ33975EK
• Description: IC DETECTOR MULT SWITCH 32-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MCZ33975EK

• Applications: Automotive
• Interface: SPI
• Voltage - Supply: 5.5 V ~ 28 V
• Package / Case: 32-SOIC (7.5mm Width) Exposed Pad, 32-eSOIC, 32-HSOIC
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

33975 device exits Sleep Mode and enters Normal Mode.
Notice that the device will exit Sleep Mode when the interrupt
timer expires or when a switch change of state occurs. The
falling edge of
Figure 12
Mode. During the 125μs, the device is fully active and switch
states are read. The quiescent current is calculated by
integrating the normal running current over scan period plus
approximately 60μA.
Analog Integrated Circuit Device Data
Freescale Semiconductor
Figure
Inputs active for 125 us
Inputs active for 125 us
Inputs active for 125 us
out of 32 ms
out of 32 ms
out of 32 ms
5, page 11, is a graphical description of how the
Inputs active for
125μs out of 32ms
illustrates the current consumed during Sleep
Figure 12. Sleep Current Waveform
INT
I=V/R or 0.270V/100Ω=2.7mA
I=V/R or 0.270V/100ohm = 2.7mA
I=V/R or 0.270V/100ohm = 2.7mA
I=V/R or 0.270V/100ohm = 2.7mA
triggers the MCU to wake from Sleep state.
6.0mV/100Ω=60μA
I=V/R or
I=V/R or 6mV/100ohm = 60 uA
I=V/R or 6mV/100ohm = 60 uA
I=V/R or 6mV/100ohm = 60 uA
TEMPERATURE MONITOR
programmed with the wetting current timers disabled,
considerable power will be dissipated by the IC. For this
reason temperature monitoring has been implemented. The
temperature monitor is active in the Normal Mode only. When
the IC temperature is above the thermal limit, the temperature
monitor will do all of the following:
rising edge of
below the thermal limit. When die temperature has cooled
below thermal limit, the device will resume previously
programmed settings.
With multiple switch inputs closed and the device
• Generate an interrupt.
• Force all wetting current sources to revert to 2.0mA/
• Maintain the 2.0mA/4.0mA sustain currents and all
• Set the thermal flag bit in the SPI output register.
The thermal flag bit in the SPI word will be cleared on the
4.0mA sustain currents
other functionality.
CS
provided the die temperature has cooled
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
33975
23