MCZ33993EW Freescale Semiconductor, MCZ33993EW Datasheet - Page 22

• Manufacturer Part Number: MCZ33993EW
• Description: IC MULTIPLE SWITCH DETECT 32SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MCZ33993EW

• Applications: *
• Interface: *
• Voltage - Supply: *
• Package / Case: 32-SOIC (7.5mm Width)
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

inputs tri-state) required to set up the device to drive a
MOSFET are as follows:
disable), the MOSFET gate will be pulled to ground. From this
point forward the MOSFET may be turned on and off by
sending the settings command :
open load detection. This is done by using an SGn input
comparator. With the SGn input in tri-state, the load will pull
up the SGn input to battery. With open load the SGn pin is
pulled down to ground through an external resistor. The open
load is indicated by a logic [1] in the SO data bit.
voltage in the MOSFET ON state. By sourcing 2.0 mA of
22
33993
TYPICAL APPLICATIONS
INTRODUCTION
VBAT
The sequence of commands (from Normal mode with
• wetting current timer enable command – Disable SPn
• metallic command – Set SPn to 16 mA or 2.0 mA gate
• settings command – Set SPn as switch-to-battery (refer
• tri-state command – Disable tri-state for SPn (refer to
After the tri-state command has been sent (tri-state
• settings command – SPn as switch-to-ground
• settings command – SPn as switch-to-battery
Monitoring of the MOSFET drain in the OFF state provides
The analog command may be used to monitor the drain
wetting current timer (refer to
drive current (refer to
to
Table
(MOSFET ON)
(MOSFET OFF)
Table
Figure 14. MOSFET or LED Driver Output
9, page 14)
5, page 13)
100 kΩ
1.5 kΩ
SG13
SG0
SP0
Table
16
mA
16
mA
16
mA
16
mA
V
V
V
PWR
PWR
PWR
7, page 14)
4.0 V Ref
4.0 V Ref
Table
V
V
V
PWR
PWR
PWR
2.0
mA
4.0 V
2.0 mA
2.0
mA
2.0
mA
Ref
Comparator
Comparator
Comparator
8, page 14)
+
-
+
-
+
-
To SPI
To SPI
SG13
To SPI
SG0
SG0
AMUX
Table 20. Sleep Mode Power Supply
current to the 1.5 kΩ resistor, the analog voltage on the SGn
pin will be approximately:
does the voltage on the SGn pin. With the SGn pin selected
as analog, the MCU may perform the A / D conversion.
loads is not recommended. Inductive flyback voltages greater
than V
send signals from one module to another. Operation is similar
to the gate control of a MOSFET.
recommended but not required. The switch-to-ground inputs
are recommended for LED application. To drive the LED use
the following commands:
using the tri-state command :
These parameters are easily programmed via SPI
commands in Normal mode.
MULTIPLE 33993 DEVICES IN A MODULE SYSTEM
mode operation may be done in several ways.
shows several system configurations for power between the
MCU and the 33993 and their specific requirements for
functionality.
SPI control may be done in parallel or serial. However when
parallel mode is used, each device is addressed
independently (refer to
Therefore when sending the sleep command, one device will
enter sleep before the other. For multiple devices in a system,
it is recommended that the devices are controlled in serial (S0
MCU
5.0 V
5.0 V
V
As the voltage on the drain of the MOSFET increases, so
Using this method for controlling unclamped inductive
The SP0 – SP7 pins of this device may also be used to
For LED applications a resistor in series with the LED is
• wetting current timer enable command – Disable SGn
• metallic command – Set SGn to 16 mA
From this point forward the LED may be turned on and off
• tri-state command – Disable tri-state for SGn (LED ON)
• tri-state command – Enable tri-state for SGn (LED OFF)
Connecting power to the 33993 and the MCU for Sleep
0 V
0 V
Multiple 33993 devices may be used in a module system.
DD
wetting current timer
PWR
33993
5.0 V
5.0 V
V
may damage the IC.
0 V
0 V
DD
V
All wake-up conditions apply. (Refer to
page 17.)
SPI wake-up is not possible.
Sleep mode not possible. Current from
flow through MCU to V
Negative edge of
SPI wake-up is not possible.
SGn
= I
Analog Integrated Circuit Device Data
MCU Interface
SGn
x 1.5 kΩ + V
CS
Comments
will put 33993 in Normal mode.
Freescale Semiconductor
DD
that has been switched off.
Description, page 11).
DS
Table 20
Sleep
CS
pull up will
Mode,