MC33972ATEW Freescale Semiconductor, MC33972ATEW Datasheet - Page 4

• Manufacturer Part Number: MC33972ATEW
• Description: IC SWITCH DETECT SPI 32-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC33972ATEW

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 2. 33972 Pin Definitions
4
33972
PIN CONNECTIONS
Pin Number
A functional description of each pin can be found in the Functional Pin Description section beginning on
25 – 28
18 – 24
9 – 15,
5 – 8
16
17
29
30
31
32
1
2
3
4
VPWR
SCLK
GND
SG0
SG1
SG2
SG3
SG4
SG5
SG6
SP0
SP1
SP2
SP3
CS
SI
Pin Name
SG13 – 7
SG0 – 6,
SP0 – 3
SP4 – 7
VPWR
WAKE
AMUX
SCLK
GND
VDD
INT
SO
CS
EP
SI
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Function
Input/Output
Input/Output
Exposed Pad
EK Suffix
Ground
Ground
EK Suffix
Output
Output
Input
Input
Input
Input
Input
Input
Input
Only
Analog Multiplex Output Analog multiplex output.
Voltage Drain Supply
Switch-to-Ground
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
Programmable
Formal Name
Figure 3. 33972 Pin Connections
SPI Slave Out
Switches 0 – 7
Exposed Pad
Battery Input
SPI Slave In
Inputs 0 – 13
Serial Clock
Chip Select
Wake-up
Interrupt
Ground
PIN CONNECTIONS
SO
VDD
AMUX
INT
SP7
SP6
SP5
SP4
SG7
SG8
SG9
SG10
SG11
SG12
SG13
WAKE
Ground for logic, analog, and switch to battery inputs.
SPI control data input pin from the MCU to the 33972.
SPI control clock input pin.
SPI control chip select input pin from the MCU to the 33972. Logic [0}
allows data to be transferred in.
Programmable switch-to-battery or switch-to-ground input pins.
Switch-to-ground input pins.
Battery supply input pin. Pin requires external reverse battery
protection.
Open drain wake-up output. Designed to control a power supply
enable pin.
Open-drain output to MCU. Used to indicate an input switch change of
state.
3.3 / 5.0V supply. Sets SPI communication level for the SO driver.
Provides digital data from the 33972 to the MCU.
It is recommended that the exposed pad is terminated to GND (pin 1)
and system ground, however, the device will perform as specified with
the exposed pad unterminated (floating).
VPWR
SCLK
GND
SG0
SG1
SG2
SG3
SG4
SG5
SG6
SP0
SP1
SP2
SP3
CS
SI
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
EW / DWB Suffix
Analog Integrated Circuit Device Data
Definition
Freescale Semiconductor
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
page
10.
SO
VDD
AMUX
INT
SP7
SP6
SP5
SP4
SG7
SG8
SG9
SG10
SG11
SG12
SG13
WAKE