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参数资料
| 型号： | MCZ33291LEG |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 14/26页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH 8X LOSIDE W/SPI 24SOIC |
| 标准包装： | 30 |
| 类型： | 低端 |
| 输入类型： | SPI |
| 输出数： | 8 |
| 导通状态电阻： | 1.1 欧姆 |
| 电流 - 输出 / 通道： | 500mA |
| 电流 - 峰值输出： | 3A |
| 电源电压： | 9 V ~ 26.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC W |
| 包装： | 管件 |
FUNCTIONAL DESCRIPTION
FUNCTIONAL PIN DESCRIPTION
SERIAL OUTPUT (SO)
The serial output (SO) pin is the tri-stateable output from
the Shift register. The SO pin remains in a high impedance
state until the CS pin goes to a logic low state. The SO data
reports the drain status, either high or low relative to the
previous command word. The SO pin changes state on the
rising edge of SCLK and reads out on the falling edge of
SCLK. When an output is OFF and not faulted, the
corresponding SO data-bit is a high state. When an output is
ON, and there is no fault, the corresponding data-bit on the
SO pin will be a low logic state. The SI/SO shifting of data
follows a first-in-first-out (FIFO) protocol with both input and
A simple power ON reset delay of the system can be
programmed through the use of an RC network comprised of
a shunt capacitor from the RST pin to Ground and a resistor
to V DD , illustrated in Figure 16 . Care should be exercised
ensuring proper discharge of the capacitor. Careful attention
eliminates adverse delay of the RST and damage of the MCU
if it pulls the Reset line low, thereby accomplishing
initialization for turn ON delay. It may be easier to incorporate
delay into the software program and use a parallel port pin of
the MCU to control the 33291L RST pin.
output words transferring the MSB first. Referring to
relative to the previous command word. The SO pin is not
affected by the status of the RST pin.
Reset
V D D
RDLY
+
20 μ A
RESET (RST)
The 33291L Reset ( RST ) pin is active low. It is used to
MCU
C DLY
Reset
33291
clear the SPI Shift register. In doing so, all output switches
are set at OFF. With the device in a system with an MCU,
upon initial system power-up, the MCU holds the RST pin of
the device in a logic low state, ensuring all outputs to be OFF
until both the VDD and VPWR pin voltages are adequate for
predictable operation. After the 33291L is reset, the MCU is
ready to assert system control with all output switches initially
OFF.
If the VPWR pin of the 33291L experiences a low voltage,
following normal operation, the MCU should pull the RST pin
low to shut down the outputs and clear the input data register.
The RST pin is active low and has an internal pull-down
incorporated to ensure operational predictability should the
external pull-down of the MCU open circuit. The internal pull-
down is only 25 μ A, affording safe and easy interfacing to the
MCU. The RST pin of the 33291L should be pulled to a logic
low state for a duration of at least 250 ns to ensure reliable a
reset.
Figure 16. Power ON Reset
SHORT FAULT PROTECT DISABLE (SFPD)
The Short Fault Protect Disable (SFPD) pin is used to
prevent the outputs from latching-off due to an over-current
condition. This feature provides control of incandescent lamp
loads where in-rush currents exceed the device’s analog
current limits. Essentially the SFPD pin determines whether
the 33291L output(s) will instantly shut down upon sensing an
output short or remain ON in a current limiting mode of
operation until the output short is removed or thermal
shutdown is reached. If the SFPD pin is tied to V DD = 5.0 V
the 33291L output(s) will remain ON in a current limited mode
of operation upon encountering a load short to supply or over-
current condition. When the SFPD pin is grounded, a short
circuit will immediately shut down only the output affected.
Other outputs not having a fault condition will operate
normally. The short circuit operation is addressed in more
detail later.
33291L
Analog Integrated Circuit Device Data
14
Freescale Semiconductor
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCZ33291LEGR2 | 功能描述:电源开关 IC - 配电 BASIC OCTAL SER SW RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MCZ33298EG | 功能描述:电源开关 IC - 配电 OCTAL SERIAL SWITCH RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MCZ33298EG/R2 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Eight Output Switch with Serial Peripheral Interface I/O |
| MCZ33298EGR2 | 功能描述:电源开关 IC - 配电 OCTAL SERIAL SWITCH RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MCZ3334EF | 功能描述:基准电压& 基准电流 HI ENERGY IGNITION RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
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