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參數(shù)資料
| 型號(hào)： | MAX303 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Precision.Dual.High-Speed Analog Switches |
| 中文描述： | 高精度、雙路、高速模擬開關(guān) |
| 文件頁數(shù)： | 15/18頁 |
| 文件大?。?/td> | 503K |
| 代理商： | MAX303 |
±80V Fault-Protected/Tolerant CAN
Transceivers for In-Car Applications
Table 1. Failure States (continued)
Failure 8
—
CANH Short Circuited to Vcc
M
______________________________________________________________________________________
15
MODE
DESCRIPTION
Detection
Receiver
Driver
Sensing a permanent dominant condition on CANH for a timeout period.
Receiver switches to single ended on CANL.
CANH and RTH are both switched off (high impedance) and transmission continues on CANL after timeout.
Recovery
When the short is removed, the recessive bus voltage is restored. If the differential voltage remains below the
recessive threshold level for the timeout period, reception and transmission switch back to the differential mode.
MODE
DESCRIPTION
Detection
Receiver
Driver
Detection is provided, sensing the pulse-count difference between CANL and CANH (pulse count = 4).
Receiver remains in differential mode. No received data lost.
Driver remains in differential mode. No transmission data lost.
Recovery
Recovery is provided, sensing the pulse-count difference between CANL and CANH after the detection of four
consecutive pulses.
Failure 9
—
CANL Short Circuited to Vcc(Normal Mode Only)
DRIVER OUTPUTS STATE
CANH
Enabled
Disabled
Enabled
Enabled
Disabled
Enabled
Enabled
Enabled
Enabled
Disabled
Enabled
FAILURE NO.
DESCRIPTION
MODE
INTERNAL SWITCHES STATE
CANL
Enabled
Disabled
Enabled
Enabled
Enabled
Disabled
Enabled
Enabled
Disabled
Enabled
Enabled
No failure
No failure
1
2
3
4
5
6
7
8
9
—
—
Normal
Low power
Normal
Normal
All
All
Normal
Normal
All
All
Normal
RTH, RTL on
RTH, I_RTL on
RTH, RTL on
RTH, RTL on
RTH off
RTL or I_RTL off
RTH, RTL on
RTL off, RTH on
RTL or I_RTL off
RTH off
RTH, RTL on
CANH wire interrupted
CANL wire interrupted
CANH short to BATT
CANL short to GND
CANH short to GND
CANL short to BATT
CANL short to CANH
CANH short to V
CC
CANL short to V
CC
Table 2. Summary of the Driver Outputs and Internal Switches State During Fault
Conditions
Note:
The RTH-pulldown current switch and the RTL-pullup current switch are closed in normal mode with or without fault conditions,
open in sleep mode.
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