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| 型号： | MCZ33975EK |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 9/32页 |
| 文件大小： | 0K |
| 描述： | IC DETECTOR MULT SWITCH 32-SOIC |
| 标准包装： | 42 |
| 应用： | 自动 |
| 接口： | SPI |
| 电源电压： | 5.5 V ~ 28 V |
| 封装/外壳： | 32-BSOP（0.295"，7.50mm 宽）裸露焊盘 |
| 供应商设备封装： | 32-SOICW 裸露焊盘 |
| 包装： | 管件 |
| 安装类型： | 表面贴装 |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
17
33975
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
WAKE-UP/INTERRUPT REGISTER
The Wake-up/Interrupt Register defines the inputs that are
allowed to wake the 33975 from Sleep mode or set the INT
pin low in Normal mode. Programming the wake-up/interrupt
bit to logic [0] will disable the specific input from generating
an interrupt and will disable the specific input from waking the
IC in Sleep mode (refer to Table 7). Programming the wake-
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
or update the Wake-up/Interrupt Register via software at any
time in Normal mode.
WETTING CURRENT REGISTER
The 33975 has two levels of switch-to-ground contact
current, 32 and 4.0 mA, and two levels of switch-to-battery
contact current, 16 and 2.0 mA (see Figure 11). The metallic
command is used to set the switch contact current level (refer
to Table 8). Programming the metallic bit to logic [0] will set
the switch wetting current to 2.0 mA/4.0 mA. Programming
the metallic bit to logic [1] will set the switch contact wetting
current to 16 mA/32 mA. The MCU may change or update the
Wetting Current Register via software at any time in Normal
Mode.
Wetting current is designed to provide higher levels of current
during switch closure. The higher level of current is designed
to keep switch contacts from building up oxides that form on
the switch contact surface.
Figure 11. Contact Wetting and Sustain Current
for Switch-to-Ground Input
WETTING CURRENT TIMER REGISTER
Each switch input has a designated 20 ms timer. The timer
starts when the specific switch input crosses the comparator
threshold (4.0 V). When the 20 ms timer expires, the contact
current is reduced from 16 to 2.0 mA for switch-to-battery
inputs and 32 to 4.0 mA for switch-to-ground inputs. The
wetting current timer may be disabled for a specific input.
When the timer is disabled, wetting current will continue to
flow through the closed switch contact. With multiple wetting
current timers disabled, power dissipation for the IC must be
considered.
The MCU may change or update the Wetting Current Timer
Register via software at any time in Normal mode. This allows
the MCU to control the amount of time wetting current is
applied to the switch contact. Programming the wetting
current timer bit to logic [0] will disable the wetting current
timer. Programming the wetting current timer bit to logic [1]
will enable the wetting current timer (refer to Table 9).
Table 7. Wake-Up /Interrupt Command
Wake-up/Interrupt Command
Command Bits
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
1
0
X
sp7 sp6 sp5 sp4 sp3 sp2 sp1 sp0
0
1
X
sg1
3
sg1
2
sg1
1
sg1
0
sg9 sg8 sg7 sg6 sg5 sg4 sg3 sg2 sg1 sg0
Switch Contact Voltage
32 mA Switch Wetting Current
4.0 mA Switch Sustain Current
20 ms Wetting Current Timer
Table 8. Metallic Command
Metallic Command
Command Bits
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
1
0
X
sp7 sp6 sp5 sp4 sp3 sp2 sp1 sp0
0
1
0
1
X
sg1
3
sg1
2
sg1
1
sg1
0
sg9 sg8 sg7 sg6 sg5 sg4 sg3 sg2 sg1 sg0
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相关代理商/技术参数 |
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|---|---|
| MCZ33975EKR2 | 功能描述:接口 - 专用 MULTI SW DETECT INTERFACE RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
| MCZ33976EG | 功能描述:功率驱动器IC CONFIG DUAL GAUGE DR RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MCZ33976EG | 制造商:Freescale Semiconductor 功能描述:IC STEPPER MOTOR GUAGE DRIVER SPI |
| MCZ33976EG/R2 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Dual Gauge Driver with Configurable Response Time |
| MCZ33976EGR2 | 功能描述:功率驱动器IC CONFIG DUAL GAUGE DR RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
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