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| 型号： | MC33399DR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 2/19页 |
| 文件大小： | 0K |
| 描述： | IC LIN INTERFACE W/WAKE 8-SOIC |
| 标准包装： | 1 |
| 系列： | * |
| 应用： | * |
| 接口： | * |
| 电源电压： | * |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 剪切带 (CT) |
| 安装类型： | 表面贴装 |
| 其它名称： | MC33399DR2CT |
Analog Integrated Circuit Device Data
10
Freescale Semiconductor
33399
FUNCTIONAL DESCRIPTION
INTRODUCTION
FUNCTIONAL DESCRIPTION
INTRODUCTION
The 33399 is a Physical Layer component dedicated to
automotive LIN sub-bus applications.
The 33399 features include speed communication from
1.0 kbps to 20 kbps, up to 60 kbps for Programming mode,
and active bus waveshaping to minimize radiated emission.
The device offers three different wake-up capabilities:
wake-up from LIN bus, wake-up from the MCU command,
and dedicated high voltage wake-up input.
The INH output may be used to control an external voltage
regulator.
FUNCTIONAL PIN DESCRIPTION
POWER SUPPLY PIN (VSUP)
The VSUP power supply pin is connected to a battery
through a serial diode for reverse battery protection. The DC
operating voltage is from 7.0 to 27 V. This pin sustains
standard automotive voltage conditions such as 27 V DC
during jump-start conditions and 40 V during load dump. To
avoid a false bus message, an undervoltage reset circuitry
disables the transmission path (from TXD to LIN) when VSUP
falls below 7.0 V. Supply current in the Sleep mode is
typically 20
A.
GROUND PIN (GND)
In case of a ground disconnection at the module level, the
33399 does not have significant current consumption on the
LIN bus pin when in the recessive state. (Less than 100 A is
sourced from LIN bus pin, which creates 100 mV drop
voltage from the 1.0 k
LIN bus pull-up resistor.) For the
dominant state, the pull-up resistor should always be active.
The 33399 handles a ground shift up to 3.0 V when
VSUP > 9.0 V. Below 9.0 V VSUP, a ground shift can reduce
VSUP value below the minimum VSUP operation of 7.0 V.
LIN BUS PIN (LIN)
The LIN bus pin represents the single-wire bus transmitter
and receiver.
Transmitter Characteristics
The LIN driver is a low side MOSFET with internal current
limitation and thermal shutdown. An internal pull-up resistor
with a serial diode structure is integrated so no external pull-
up components are required for the application in a slave
node. An additional pull-up resistor of 1.0 k
must be added
when the device is used in the master node.
Voltage can go from -18 to 40 V without current other than
the pull-up resistance. The LIN pin exhibits no reverse current
from the LIN bus line to VSUP, even in the event of GND shift
or VPWR disconnection. LIN thresholds are compatible with
the LIN protocol specification.
The fall time from recessive to dominant and the rise time
from dominant to recessive are controlled to typically
2.0 V/s. The symmetry between rise and fall time is also
guaranteed.
When going from dominant to recessive, the bus
impedance parasitic capacitor must be charged up to VSUP.
This charge-up is achieved by the total system pull-up current
resistors. In order to guarantee that the rise time is within
specification, maximum bus capacitance should not exceed
10 nF with bus total pull-up resistance less than 1.0 k
.
Receiver Characteristics
The receiver thresholds are ratiometric with the device
supply pin. Typical threshold is 50%, with a hysteresis
between 5% and 10% of VSUP.
DATA INPUT PIN (TXD)
The TXD input pin is the MCU interface that controls the
state of the LIN output. When TXD is LOW, LIN output is
LOW; when TXD is HIGH, the LIN output transistor is turned
OFF.
This pin has an internal 5.0 V internal pull-up current
source to set the bus in a recessive state in case the MCU is
not able to control it; for instance, during system power-up/
power-down. During the Sleep mode, the pull-up current
source is turned OFF.
DATA OUTPUT PIN (RXD)
The RXD output pin is the MCU interface that reports the
state of the LIN bus voltage. LIN HIGH (recessive) is reported
by a high level on RXD; LIN LOW (dominant) is reported by a
low voltage on RXD. RXD output structure is a CMOS-type
push-pull output stage.
ENABLE INPUT PIN (EN)
The EN pin controls the operation mode of the interface. If
EN = logic [1], the interface is in normal mode, with the
transmission path from TXD to LIN and from LIN to RXD both
active. If EN = logic [0], the device is in Sleep mode or low
power mode, and no transmission is possible.
In Sleep mode, the LIN bus pin is held at VSUP through the
bus pull-up resistors and pull-up current sources. The device
can transmit only after being awakened. Refer to the INHIBIT
OUTPUT PIN (INH) description on page 11.
During Sleep mode, the device is still supplied from the
battery voltage (through VSUP pin). Supply current is 20 A
typical. Setting the EN pin to LOW will turn the INH to high-
impedance. The EN pin has an internal 20 A pull-down
current source to ensure the device is in Sleep mode if EN
floats.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC33399PEF | 功能描述:LIN 收发器 LIN PHYSICAL INTERFACE RoHS:否 制造商:NXP Semiconductors 工作电源电压: 电源电流: 最大工作温度: 封装 / 箱体:SO-8 |
| MC33399PEFR2 | 功能描述:LIN 收发器 LIN PHYSICAL INTERFACE RoHS:否 制造商:NXP Semiconductors 工作电源电压: 电源电流: 最大工作温度: 封装 / 箱体:SO-8 |
| MC3340P | 制造商:Motorola Inc 功能描述: |
| MC33412-041-11 | 制造商:SPC Multicomp 功能描述:ROCKER SWITCH SPDT CTR OFF 制造商:SPC Multicomp 功能描述:ROCKER SWITCH, SPDT, CTR OFF 制造商:SPC Multicomp 功能描述:SWITCH, ROCKER, SPDT, 15A, 250V, BLACK; Contact Configuration:SPDT; Switch Operation:On-Off-On; Contact Current Max:10A; Contact Voltage AC Nom:250V; Contact Voltage DC Nom:28V; Switch Mounting:Panel; Actuator / Cap Color:Black ;RoHS Compliant: Yes |
| MC33412-041-11 | 制造商:SPC Multicomp 功能描述:SWITCH ROCKER SPDT CTR OFF |
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