MCZ33975EK Freescale Semiconductor, MCZ33975EK Datasheet

Page 1

... SG13 Figure 1. 33975 Simplified Application Diagram * This document contains certain information on a new product. Specifications and information herein are subject to change without notice. © Freescale Semiconductor, Inc., 2005 - 2007. All rights reserved. ≤ 28V MC33975EK/R2 MCZ33975EK/R2 MCZ33975AEK/R2 μA V BAT 33975 VPWR ...

Page 2

... DEVICE VARIATIONS Table 1. Device Variations Device 33975 33975A 33975 2 DEVICE VARIATIONS Switch Input Voltage Range -14 to 38V DC -14 to 40V DC Reference Location 5 5 Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 3

... SG7 SG8 SG9 SG10 V V PWR PWR SG11 32.0 4 SG12 SG13 4.0 V Ref Figure 2. 33975 Simplified Internal Block Diagram Analog Integrated Circuit Device Data Freescale Semiconductor INTERNAL BLOCK DIAGRAM 5 PWR SP0 V PWR Sleep PWR To + – SPI Comparator SP7 Oscillator To + Clock Control – ...

Page 4

... Analog multiplex output 3.3/5.0V supply sets SPI communication level for the SO driver Provides digital data from 33975 to the MCU SO VDD AMUX INT SP7 SP6 SP5 SP4 SG7 SG8 SG9 SG10 SG11 SG12 SG13 WAKE Description Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 5

... All Programmable Switches (SP) and Switch-to-Ground (SG) input pins when tested individually. 3. Maximum power dissipation at T =150 J 4. Thermal resistance between the die and the exposed die pad. Analog Integrated Circuit Device Data Freescale Semiconductor MAXIMUM RATINGS = 100pF, R ZAP ° C junction temperature with no heatsink used. ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS ...

Page 6

... Temperature and Moisture Sensitivity Levels (MSL www.freescale.com, search by part number [e.g. remove prefixes/suffixes and enter the core ID to view all orderable parts. (i.e. MC33xxxD enter 33xxx), and review parametrics. 33975 6 (4) (5), (6) Symbol Value Unit ° C θ 1.2 θ JC °C T Note 6 PPRT Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 7

... Device operational. Wetting and sustain currents are reduced. Operating the analog multiplexer below 8.0V is not recommended. 8. Thermal considerations must be taken when operating the device above 28V. Analog Integrated Circuit Device Data Freescale Semiconductor ≤ 5.5V, 8.0V ≤ V ≤ 28V, -40°C ≤ T PWR ...

Page 8

... Min I -2.0 OFFSET V OFFSET - – 0 3. 155 LIM T 5.0 LIM( HYS ) Analog Integrated Circuit Device Data ≤ 125°C, unless otherwise C = 13V 25°C. PWR A Typ Max Unit 1.4 2.0 μ – – 4.0 4.3 V ° – 185 C ° Freescale Semiconductor ...

Page 9

... Maximum Voltage Applied to Through External Pull-Up WAKE Notes 11. Upper and lower logic threshold voltage levels apply to SI, 12. This parameter is guaranteed by design however, is not production tested. Analog Integrated Circuit Device Data Freescale Semiconductor ≤ 5.5V, 8.0V ≤ V ≤ 28V, -40°C ≤ PWR Symbol ...

Page 10

... Analog Integrated Circuit Device Data Freescale Semiconductor Unit ms μs μ μ ...

Page 11

... Figure 5. Sleep Mode to Normal Mode Operation INT Latch switch status CS on falling edge of CS SGn 1 SGn Bit in SPI Word Switch Status Command Analog Integrated Circuit Device Data Freescale Semiconductor TIMING DIAGRAMS t t SI(SU) SI(HOLD) MSB in t VALID MSB out Figure 4. SPI Timing Characteristics Wake-Up From Interrupt ...

Page 12

... INT if a switch contact change CS was low. CS high and WAKE will place all INT pin is an open-drain output and a wake-up pin is low. In the Sleep WAKE pin is high. The pin has a pull-up to WAKE Analog Integrated Circuit Device Data Freescale Semiconductor CS CS pin ...

Page 13

... GROUND (GND) The GND pin provides ground for the IC as well as ground for inputs programmed as switch-to-battery inputs. Analog Integrated Circuit Device Data Freescale Semiconductor PROGRAMMABLE SWITCHES (SP0–SP7) The 33975 device has 8 switch inputs capable of being programmed to read switch-to-ground or switch-to-battery contacts. The input is compared with a 4.0V reference. When ...

Page 14

... The input is compared with a 4.0V reference. Voltages greater than 4.0V are considered open. Voltages less than 4.0V are considered closed. Note: Each of these inputs may be used to supply current to sensors external to a module. Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 15

... Multiple ICs may be SPI-configured in parallel or serial. Figures 9 and 10 show the configurations. When using the serial configuration, 48-clock cycles are required to transfer data in/out of the ICs. Analog Integrated Circuit Device Data Freescale Semiconductor MCU INTERFACE DESCRIPTION MC68HCXX Microcontroller Figure 8 Shift Register Parallel Ports ) pin. ...

Page 16

... Command) (Reset Command) . The to the MCU CS INT will not INT switch has closed during low). This prevents switch states CS Table 6). To set an SPn Battery/Ground Select sp7 sp6 sp5 sp4 sp3 sp2 sp1 sp0 Analog Integrated Circuit Device Data Freescale Semiconductor 1 0 ...

Page 17

... When the timer is disabled, wetting current will continue to flow through the closed switch contact. With multiple wetting Analog Integrated Circuit Device Data Freescale Semiconductor up/interrupt bit to logic [1] will enable the specific input to generate an interrupt with switch change of state and will enable the specific input as wake-up. The MCU may change ...

Page 18

... Table 11. Analog Command Not used Command Bits sp7 sp6 sp5 sp4 sp3 sp2 sp1 sp0 sp7 sp6 sp5 sp4 sp3 sp2 sp1 sp0 Table Typical Applications section of this datasheet Current Analog Channel Select Select 4 Analog Integrated Circuit Device Data Freescale Semiconductor 11). The ...

Page 19

... Analog Integrated Circuit Device Data Freescale Semiconductor FUNCTIONAL DEVICE OPERATION Analog Channel Select No Input Selected SG0 SG1 SG2 SG3 SG4 SG5 SG6 SG7 SG8 SG9 SG10 SG11 ...

Page 20

... SP4 SP3 SP2 SP7 SP6 SP5 SP4 SP3 SP2 SG5 SG4 SG3 SG2 SG1 SG0 SP7 SP6 SP5 SP4 SP3 SP2 SG5 SG4 SG3 SG2 SG1 SG0 32mA 4. Analog Integrated Circuit Device Data Freescale Semiconductor SP1 SP0 SP1 SP0 SP1 SP0 0 0 ...

Page 21

... All inputs tri-state-disabled (comparator is active) • Analog select 00000 (no input channel selected) With the device programmed as above, an interrupt will be generated with each switch contact change of state (open-to- close or close-to-open) and 32mA of contact wetting current Analog Integrated Circuit Device Data Freescale Semiconductor Setting Bits ...

Page 22

... No interrupt wake-up Scan Period 000 No Scan 001 1.0ms 010 2.0ms 011 4.0ms 100 8.0ms 101 16ms 110 32ms 111 64ms Analog Integrated Circuit Device Data Freescale Semiconductor at INT 0 ...

Page 23

... Figure 12. Sleep Current Waveform Analog Integrated Circuit Device Data Freescale Semiconductor FUNCTIONAL DEVICE OPERATION OPERATIONAL MODES TEMPERATURE MONITOR With multiple switch inputs closed and the device programmed with the wetting current timers disabled, considerable power will be dissipated by the IC. For this reason temperature monitoring has been implemented ...

Page 24

... Temperature Monitor, supply for switch-to- PWR Functional Device 16 under Table 8, CS, Figure 14, Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 25

... ADC = 210 counts Analog Integrated Circuit Device Data Freescale Semiconductor Using the equation yields the following: The ADC value of 213 counts is the value with 0% error (neglecting the resistor tolerance and AMUX input offset voltage). Now calculate the count value induced by the DD mismatch in current sources ...

Page 26

... Sleep Mode is not possible. Current from pull-up will flow through the MCU to the VDD that has been switched off. The negative edge of will put 33975 in Normal Mode. CS SPI wake-up is not possible. MCU Interface Description, page 15). Analog Integrated Circuit Device Data Freescale Semiconductor the CS ...

Page 27

... All parameters for Sleep Mode should be updated prior to sending the sleep command. Analog Integrated Circuit Device Data Freescale Semiconductor TYPICAL APPLICATIONS OPERATIONAL MODES The 33975 IC has an internal 5.0V supply from the VPWR pin. A POR circuit monitors the internal 5.0V supply. In the event of transients on the VPWR pin, an internal reset may occur ...

Page 28

... PWR VPWR V DD VDD CS INT SI SO Figure 16. Power Supply Active in Sleep Mode Power Supply Enable V PWR V DD VDD CS INT MC68HCXX Microprocessor CS INT MOSI MISO SCLK AN0 V DD MC68HCXX Microprocessor CS INT MOSI MISO SCLK AN0 Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 29

... Important: For the most current revision of the package, visit number listed below. Analog Integrated Circuit Device Data Freescale Semiconductor PACKAGING PACKAGE DIMENSIONS www.freescale.com and perform a “keyword” search on the “98A” PACKAGING PACKAGE DIMENSIONS 33975 29 ...

Page 30

... PACKAGING PACKAGE DIMENSIONS 33975 30 EK SUFFIX 32-PIN EXPOSED PAD 98ASA10556D REVISION D Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 31

... Analog Integrated Circuit Device Data Freescale Semiconductor PACKAGE DIMENSIONS (Continued) EK SUFFIX 32-PIN EXPOSED PAD 98ASA10556D REVISION D PACKAGING PACKAGE DIMENSIONS (CONTINUED) 33975 31 ...

Page 32

... PACKAGING PACKAGE DIMENSIONS (CONTINUED) 33975 32 EK SUFFIX 32-PIN EXPOSED PAD 98ASA10556D REVISION D Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 33

... DESCRIPTION OF CHANGES • Implemented Revision History page 6/2007 5 • Updated to Freescale form and style • Added MCZ33975EK/R2 and MCZ33975AEK/R2 • Removed Peak Package Reflow Temperature During Reflow, and added Reflow Temperature During Reflow • Removed MC33975AEK/R2 from the Ordering Information 11/2007 6 • ...

Page 34

... Freescale Semiconductor product could create a situation where personal injury or death may occur. Should Buyer ...