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參數(shù)資料
| 型號(hào)： | MC33298DW |
| 廠商： | MOTOROLA INC |
| 元件分類： | 外設(shè)及接口 |
| 英文描述： | OCTAL SERIAL SWITCH (SPI Input/Output) |
| 中文描述： | 1 A 8 CHANNEL, BUF OR INV BASED PRPHL DRVR, PDSO24 |
| 封裝： | PLASTIC, SOP-24 |
| 文件頁數(shù)： | 9/24頁 |
| 文件大小： | 280K |
| 代理商： | MC33298DW |
MC33298
9
MOTOROLA ANALOG IC DEVICE DATA
CIRCUIT DESCRIPTION
Introduction
The MC33298 was conceived, specified, designed, and
developed for automotive applications. It is an eight output
low side power switch having 8–bit serial control. The
MC33298 incorporates SMARTMOS
technology having
effective 2.0
μ
CMOS logic, bipolar/MOS analog circuitry, and
independent state of the art double diffused MOS (DMOS)
power output transistors. Many benefits are realized as a
direct result of using this mixed technology. A simplified block
diagram of the MC33298 is shown in Figure 1.
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
economically incorporated into the monolithic design. In
addition, 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 65 V at 0.5 A
independent output voltage clamps to provide fast inductive
turn–off and transient protection.
The MC33298 uses high efficiency updrain power DMOS
output transistors exhibiting very low drain to source “on”
resistance values (RDS(on)
≤
0.45
) and dense CMOS
control logic. Operational bias currents of less than 4.0 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
and not available for load use.
In operation the MC33298 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 MC33298
directly interfaces to an MCU and operates at system clock
serial frequencies in excess of 2.0 MHz using a Synchronous
Peripheral Interface (SPI) for control and diagnostic readout.
Figure 11 shows the basic SPI configuration between an
MCU and one MC33298.
Figure 11. SPI Interface with Microcontroller
To
Logic
MC33298
Shift Register
Parallel
Ports
Receive
Buffer
MC68HCXX
Microcontroller
CSB
Reset
SCLK
SO
SI
MISO
MOSI
Shift Register
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 with as little as 9.0 V supply
(VPWR), the maximum RDS(on) of an output at room
temperature is 0.45
(0.35
typical) and increases to only
1.0
(0.5
typical) as VPWR is decreased to 5.5 V.
All inputs are compatible with 5.0 V CMOS logic levels and
incorporate 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.”
8 Outputs
SO
SI
CSB
SCLK
MC33298
8 Outputs
SO
SI
CSB
SCLK
MC33298
8 Outputs
SO
SI
CSB
SCLK
MC33298
8 Outputs
SO
SI
CSB
SCLK
MC33298
Parallel Port
MISO
IRQ
SCLK
MOSI
MC68XX
Microcontroller
SPI
Figure 12. MC33298 SPI System Daisy Chain
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC33298DWR2 | 功能描述:IC OCTAL SERIAL SWITCH 24-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅(qū)動(dòng)器 - 內(nèi)部開關(guān) 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:高端/低端驅(qū)動(dòng)器 輸入類型:SPI 輸出數(shù):8 導(dǎo)通狀態(tài)電阻:850 毫歐，1.6 歐姆 電流 - 輸出 / 通道:205mA，410mA 電流 - 峰值輸出:500mA，1A 電源電壓:9 V ~ 16 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:PG-DSO-20-45 包裝:帶卷 (TR) |
| MC33298P | 功能描述:IC SWITCH SERIAL OCTAL 20-DIP RoHS:否 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅(qū)動(dòng)器 - 內(nèi)部開關(guān) 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:高端/低端驅(qū)動(dòng)器 輸入類型:SPI 輸出數(shù):8 導(dǎo)通狀態(tài)電阻:850 毫歐，1.6 歐姆 電流 - 輸出 / 通道:205mA，410mA 電流 - 峰值輸出:500mA，1A 電源電壓:9 V ~ 16 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:PG-DSO-20-45 包裝:帶卷 (TR) |
| MC33304P | 制造商:ON Semiconductor 功能描述: |
| MC3330P | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC33340D | 功能描述:電池管理 18V Max NiCD/NiMH RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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