参数资料
型号: MC33972TEW
厂商: Freescale Semiconductor
文件页数: 27/32页
文件大小: 0K
描述: IC SWITCH DETECT SPI 32-SOIC
标准包装: 42
应用: 开关监控
接口: SPI 串行
电源电压: 3.1 V ~ 5.25 V
封装/外壳: 32-SOIC(0.295",7.50mm 宽)
供应商设备封装: 32-SOIC
包装: 管件
安装类型: 表面贴装
Analog Integrated Circuit Device Data
4
Freescale Semiconductor
33972
PIN CONNECTIONS
PIN CONNECTIONS
Figure 3. 33972 Pin Connections
Table 2. 33972 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on page 10.
Pin Number
Pin Name
Pin Function
Formal Name
Definition
1
GND
Ground
Ground for logic, analog, and switch to battery inputs.
2
SI
Input
SPI Slave In
SPI control data input pin from the MCU to the 33972.
3
SCLK
Input
Serial Clock
SPI control clock input pin.
4
CS
Input
Chip Select
SPI control chip select input pin from the MCU to the 33972. Logic [0}
allows data to be transferred in.
5–8
25–28
SP0–3
SP4–7
Input
Programmable
Switches 0–7
Programmable switch-to-battery or switch-to-ground input pins.
9–15,
18–24
SG0–6,
SG13–7
Input
Switch-to-Ground
Inputs 0–13
Switch-to-ground input pins.
16
VPWR
Input
Battery Input
Battery supply input pin. Pin requires external reverse battery
protection.
17
WAKE
Input/Output
Wake-up
Open drain wake-up output. Designed to control a power supply
enable pin.
29
INT
Input/Output
Interrupt
Open-drain output to MCU. Used to indicate an input switch change of
state.
30
AMUX
Output
Analog Multiplex Output Analog multiplex output.
31
VDD
Input
Voltage Drain Supply
3.3/5.0 V supply. Sets SPI communication level for the SO driver.
32
SO
Output
SPI Slave Out
Provides digital data from the 33972 to the MCU.
EP
Ground
Exposed Pad
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).
SO
1
SP7
SP6
SP5
SP4
SG7
SG8
SG9
SG10
SG11
SG13
WAKE
SG12
INT
VDD
AMUX
GND
SP0
SP1
SP2
SP3
SG0
SG1
SG2
SG3
SG4
SG6
VPWR
SG5
CS
SI
SCLK
8
9
10
11
12
13
14
15
16
3
4
5
6
7
2
32
25
24
23
22
21
20
19
18
17
30
29
28
27
26
31
Exposed Pad
EK Suffix
Only
SO
1
SP7
SP6
SP5
SP4
SG7
SG8
SG9
SG10
SG11
SG13
WAKE
SG12
INT
VDD
AMUX
GND
SP0
SP1
SP2
SP3
SG0
SG1
SG2
SG3
SG4
SG6
VPWR
SG5
CS
SI
SCLK
8
9
10
11
12
13
14
15
16
3
4
5
6
7
2
32
25
24
23
22
21
20
19
18
17
30
29
28
27
26
31
EW Suffix
EK Suffix
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