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| 型号： | MC33793D |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 2/27页 |
| 文件大小： | 0K |
| 描述： | IC DSI SLAVE FOR R-SENSE 16-SOIC |
| 标准包装： | 48 |
| 类型： | 分布式系统接口 |
| 输入类型： | 逻辑 |
| 输出类型： | 逻辑 |
| 接口： | 并联 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC N |
| 包装： | 管件 |
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Analog Integrated Circuit Device Data
10
Freescale Semiconductor
33793
FUNCTIONAL DESCRIPTION
INTRODUCTION
FUNCTIONAL DESCRIPTION
INTRODUCTION
The 33793 is designed to be used with a sensor at a location
that is remote from a centralized MCU. This device provides
power, measurement, and communications between the
remote sensor and the centralized MCU over a DSI bus.
Sensors such as accelerometers can be powered from the
regulated output of the device, and the resulting analog value
from the sensor can be converted from an analog level to a
digital value for transmission over the DSI bus in response to
a query from the MCU. Four I/O lines can be configured by
the central MCU over the DSI bus as analog inputs, digital
inputs, or digital outputs. This allows more than one sensor to
be remotely controlled and measured by a single 33793.
Additionally, a high drive logic output is provided that can be
used to power other low-power sensors.
Power is passed from BUSIN or BUSOUT through on-board
rectifiers to a storage capacitor (referred to as the H_CAP).
The H_CAP stores energy during the highest voltage
excursions of the BUSIN or BUSOUT pin (idle) and supplies
energy to power the device during low excursions of BUSIN
and BUSOUT.
The Regulator supplies an on-board regulated voltage for
internal use, and the Power on Reset (POR) circuit provides
a reset signal during low-voltage conditions and during power
up/down. Some current is available for low-power sensors.
Data from the Central Control Unit (CCU) is applied to the
BUSIN and/or BUSOUT pins as voltage levels that are
sensed by the Level Detection circuitry. The Serial Decoder
detects these transitions and decodes the incoming data.
The Control Logic provides overall control of the 33793. It
controls diagnostic testing and formats responses to
commands with the message encoder. Responses are
formed via a switched current source that is slew-rate
controlled.
The one-time programmable (OTP) memory array provides
the nonvolatile storage for the pre-programmed address. It is
accessed via the Read/Write NVM command. It has a built-in
hardware lock that only allows one write.
FUNCTIONAL PIN DESCRIPTION
BUS RETURN (BUSRTN)
This pin provides the common return for power and
signalling.
INPUT/OUTPUT (I/O0, I/O1, I/O2, I/O3)
This pin can be used to provide a logic level output, a logic
input, or an analog-to-digital (A/D) input.
ANALOG GROUND (AGND)
This pin is the low reference level and power return for the
analog-to-digital converter (ADC).
LOGIC OUT (LOGOUT)
This is a logic output with higher pull-up drive capability than
the standard logic I/O.
REGULATOR OUTPUT (REGOUT)
This pin provides a regulated 5.0 V output. The power is
derived from the bus.
HOLDING CAPACITOR (H_CAP)
A capacitor attached to this pin is charged by the bus during
bus idle and supplies current to run the device and for
external devices via the REGOUT pin during non-idle
periods.
DSI BUS INPUT (BUSIN)
This pin attaches to the bus and responds to initialization
commands.
DSI BUS OUTPUT (BUSOUT)
This pin attaches to the bus and responds to reverse
initialization commands.
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
a simplified representation of the 33793’s components.
RECTIFIER
This rectifier or switch peak detects the bus signal into an
external capacitor attached to H_CAP. The capacitor
supplies power during signaling while the input voltage is at a
lower level.
The voltage waveform at BUSIN and/or BUSOUT and the
size of the filter capacitor at H_CAP must be such that the
voltage at H_CAP will not drop below the frame threshold
during signaling.
POR
The 33793 leaves the reset state when the voltage on
H_CAP rises above the Power-ON Reset threshold.
TIMEOUT
A timeout timer keeps track of the length of the time when the
input is not in idle mode. If this time exceeds a limit, the part
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| MC33793DR2 | 功能描述:IC DSI SLAVE FOR R-SENSE 16-SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 传感器和探测器接口 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:74 系列:- 类型:触控式传感器 输入类型:数字 输出类型:数字 接口:JTAG，串行 电流 - 电源:100µA 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:管件 |
| MC33794DH | 功能描述:IC SENSOR ELECTRIC FIELD 44-HSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 传感器和探测器接口 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:74 系列:- 类型:触控式传感器 输入类型:数字 输出类型:数字 接口:JTAG，串行 电流 - 电源:100µA 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:管件 |
| MC33794DHR2 | 制造商:Rochester Electronics LLC 功能描述:OCCUPANT DETECT E-FIELD SENSOR FOR MCU SUPPORT - Bulk |
| MC33794DWB | 功能描述:IC SENSOR ELECTRIC FIELD 54-SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 传感器和探测器接口 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:74 系列:- 类型:触控式传感器 输入类型:数字 输出类型:数字 接口:JTAG，串行 电流 - 电源:100µA 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:管件 |
| MC33794DWBR2 | 功能描述:IC SENSOR ELECTRIC FIELD 54-SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 传感器和探测器接口 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:74 系列:- 类型:触控式传感器 输入类型:数字 输出类型:数字 接口:JTAG，串行 电流 - 电源:100µA 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:管件 |
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