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参数资料
| 型号： | MCZ33291LEG |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 12/26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
SCLK
Parallel Port
CS
SCLK
CS
SCLK
CS
SCLK
CS
SCLK
MC68XX
Microcontroller
MISO
SO
SI
SO
SI
SO
SI
SO
SI
SPI
IRQ
MOSI
33291
8 Outputs
33291
8 Outputs
33291
8 Outputs
33291
8 Outputs
Figure 13. 33291L SPI System Daisy Chain
Multiple 33291L devices can also be controlled in a
parallel input fashion using SPI, illustrated in Figure 14 . This
figure shows a possible 24 loads being controlled by only
three dedicated parallel MCU ports used for chip select.
master; however, not at the same time. Only when the master
is not communicating can a slave assume the mastership and
communicate. MCU master control is switched through the
use of the slave select ( SS ) pin of the MCUs. A master will
become a slave when it detects a logic low state on its SS pin.
These basic examples make the 33291L very attractive for
MC68XX
Microcontroller
MOSI
SCLK
33291
SI
SCLK
CS
8 Outputs
applications where a large number of loads require efficient
control. To this end, the popular Synchronous Serial
Peripheral Interface (SPI) protocol is incorporated to
communicate efficiently with the MCU.
SPI SYSTEM ATTRIBUTES
SPI
33291
The SPI system is flexible enough to communicate directly
with numerous standard peripherals and MCUs available
Parallel
Ports
A0
A1
A2
SI
SCLK
CS
8 Outputs
from Motorola and other semiconductor manufacturers. SPI
reduces the number of pins necessary for input/output (I/O)
on the 33291L. It also offers an easy means of expanding the
I/O function using few MCU pins. The SPI system of
communication consists of the MCU transmitting, in return it
receives one data-bit of information per system clock cycle.
33291
Data bits of information are simultaneously transmitted by
SI
SCLK
CS
8 Outputs
one pin, Master Out Serial In (MOSI), and received by
another pin, Master In Serial Out (MISO), of the MCU.
Some features of SPI are as follows:
? Full duplex, three-wire synchronous data transfer
Figure 14. Parallel Input SPI Control
controlling multiple 33291L devices using two MCUs. A
system can have only one master MCU at any given instant
of time and one or more slave MCUs. Master control of the
system must pass from one MCU to the other in an orderly
manner. The master MCU supplies the system clock signal
(top MCU designated the master); the lower MCU being the
slave. It is possible to have a system with more than one
? Each microcontroller can be a master or a slave
? Provides write collision flag protection
? Provides end of message interrupt flag
? Four I/Os associated with SPI (MOSI, MISO, SCLK, SS)
Drawbacks to SPI are as follows:
? An MCU is required for efficient operational control
? In contrast to parallel input control it is slower at performing
pulse width modulating (PWM) functions.
33291L
Analog Integrated Circuit Device Data
12
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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