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| 型号： | MCZ33291LEG |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 11/26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
INTRODUCTION
FUNCTIONAL DESCRIPTION
INTRODUCTION
The 33291L was conceived, specified, designed, and
developed for automotive applications. It is an eight-output
low side power switch having 8 bit serial control. The 33291L
incorporates SMARTMOS technology having CMOS logic,
MC68HCXX
Microcontroller
MOSI
SI
33291
bipolar/MOS analog circuitry, and independent state of the
art double diffused MOS (DMOS) power output transistors.
Shift Register
MISO
SO
Shift Register
Many benefits are realized as a direct result of using this
mixed technology. A simplified block diagram delineates
Receive
SCLK
To
Where bipolar devices require considerable control
current for their operation, structured MOS devices, since
they are voltage controlled, require only transient gate
charging current affording a significant decrease in power
consumption. The CMOS capability of the SMARTMOS
process allows significant amounts of logic to be
Buffer
Parallel
Ports
RST
CS
Logic
economically incorporated into the monolithic design.
Additionally, the bipolar/MOS analog circuits embedded
within the updrain power DMOS output transistors monitor
and provide fast, independent protection control functions for
each individual output. All outputs have internal 45 V at 0.5 A
independent output voltage clamps to provide fast inductive
turn-off and transient protection.
The 33291L uses high-efficiency updrain power DMOS
output transistors exhibiting very low room temperature
drain-to-source ON resistance values (R DS(ON) ≤ 1.0 Ω at
13 V V PWR ) and dense CMOS control logic. Operational bias
currents of less than 2.0 mA (1.0 mA typical) with any
combination of outputs ON are the result of using this mixed
technology and would not be possible with bipolar structures.
To accomplish a comparable functional feature set using a
bipolar structure approach would result in a device requiring
hundreds of milliamperes of internal bias and control current.
This would represent a very large amount of power to be
consumed by the device itself and not available for load use.
During operation, the 33291L functions as an eight output
serial switch serving as a microcontroller (MCU) bus
expander and buffer with fault management and fault
reporting features. In doing so, the device directly relieves the
MCU of the fault management functions. The 33291L directly
relieves the MCU of the fault management functions. The
33291L directly interfaces to an MCU, operating at system
clock serial frequencies in excess of 3.0 MHz. It uses a
Synchronous Peripheral Interface (SPI) for control and
diagnostic readout. Figure 12 illustrates the basic SPI
configuration between an MCU and one 33291L.
Figure 12. SPI Interface with Microcontroller
The circuit can also be used in a variety of other
applications in the computer, telecommunications, and
industrial fields. It is parametrically specified over an input
battery/supply range of 9.0 V to 16 V but is designed to
operate over a considerably wider range of 5.5 V to 26.5 V.
The design incorporates the use of logic level MOSFETs as
output devices. These MOSFETs are sufficiently turned ON
with a gate voltage of less than 5.0 V, thus eliminating the
need for an internal charge pump. Each output is identically
sized and independent in operation. The efficiency of each
output transistor is such that at room temperature with as little
as 9.0 V supply (V PWR ), the maximum R DS(ON) of an output
at room temperature is 1.2 Ω (0.9 Ω typical) and increases to
only 2.0 Ω as V PWR is decreased to 5.5 V.
All inputs are compatible with 5.0 V CMOS logic levels,
incorporating negative or inverted logic. Whenever an input is
programmed to a logic low state (<1.0 V) the corresponding
low side switched output being controlled will be active low
and turned ON. Conversely, whenever an input is
programmed to a logic high state (>3.0 V), the output being
controlled will be high and turned OFF.
One main advantage of the 33291L is the serial port.
When coupled to an MCU, it receives ON/OFF commands
from the MCU and in return transmits the drain status of the
device’s output switches. Many devices can be daisy-
chained together, forming a larger system, as illustrated in
Note In this example, only one dedicated MCU parallel
port (aside from the required SPI) is required for chip select
to control 32 possible loads.
33291L
Analog Integrated Circuit Device Data
Freescale Semiconductor
11
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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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