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參數(shù)資料
| 型號(hào)： | MCZ33989EG |
| 廠商： | 飛思卡爾半導(dǎo)體(中國(guó))有限公司 |
| 元件分類： | CAN |
| 英文描述： | System Basis Chip with High-Speed CAN Transceiver |
| 中文描述： | 系統(tǒng)基礎(chǔ)芯片高高速CAN收發(fā)器 |
| 文件頁(yè)數(shù)： | 52/66頁(yè) |
| 文件大小： | 1181K |
| 代理商： | MCZ33989EG |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
52
33989
TYPICAL APPLICATIONS
SUPPLEMENTAL APPLICATION NOTES
CAN Driver Overtemperature:
In case of an overtemperature condition at the CANH or
CANL driver, the driver will be automatically disabled and the
THERM bit set in the CAN register. If enabled, an interrupt
will be signalled. The GFAIL flag is set in the MCR register.
When the CAN is in an overtemperature situation, the
device is no longer able to transmit. As soon as the
temperature is below the overtemperature level minus
hysteresis, the CAN driver is automatically re-enabled.
The THERM bit is latched and two conditions are
necessary to clear it:
No longer “CAN overtemperature situation” AND
Read operation of the CAN register.
Overcurrent Detection:
The CAN interface can detect and signal over current
condition, occurring for instance in case of CANL shorted to
VBAT. This is signalled by the bit CUR in the CAN register.
An INT can be enabled, and GFAIL bit is set. The CUR bit is
latched and two conditions are necessary to clear it:
No longer “CAN over current situation” AND
Read operation of the CAN register.
Protection
The MC33989 CAN output is protected for automotive
environments.
The CAN driver is protected against overtemperature and
overcurrent.
ISO7637 Transient
The CANH and CANL are rated from +40 Vdc to -27 Vdc.
This means that the MC33989 CAN output can handle failure
situations like the bus directly shorted to the battery line in a
load dump situation (+40 V).
Ground disconnection of the module will lead to the CANH
and CANL line floating high to the VBAT supply. The rest of
the network will not be affected. However the CANH and
CANL lines of the ungrounded module will see a negative
voltage of the VBAT value, with respect to their gnd level.
Such situations can be handled by the CAN interface of the
MC33989, but also in cases of a jump start (battery at 27 V)
and gnd disconnection.
Fast transient pulses, ISO7637-3. During these pulses, the
maximum rating of the CANH and CANL lines of +40 Vdc and
-27 Vdc must be respected.
ESD
The CANH and CANL line of the MC33989 are rated at
±4 kV. An external capacitor between CANH and CANL to
gnd or a zener diode suppressor can be added to ensure a
higher module resistance to ESD.
Current in Case of Bus Short Conditions
In case of short circuit condition on the CAN bus the
current in the CAN supply, the CAN line can be different from
the nominal case. The
Figure 44
and
Table 35
describe the
various cases.
Figure 44. Current in Case of Bus Short Conditions
V2 Terminal
60 ohms
CANH line
CAN L line
I_H
I_L
I_TERM
CANH
CANL
5V
VBAT
5V
VBAT
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCZ33989EG | 制造商:Freescale Semiconductor 功能描述:IC SYSTEM BASIS W/CAN TRANCEIVER |
| MCZ33989EGR2 | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC SBC-HS RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| MCZ33990EF | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC CLASS B SERIAL TRANS. RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| MCZ33990EF | 制造商:Freescale Semiconductor 功能描述:TRANCEIVER J-1850 CLASS B 8SOIC |
| MCZ33990EF/R2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Enhanced Class B Serial Transceiver |
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