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參數(shù)資料
| 型號(hào)： | MAX3078E |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | +3.3V.±.15kV ESD-Protected.Fail-Safe.Hot-Swap.RS-485/RS-422 Transceivers |
| 中文描述： | +3.3V、±15kV ESD保護(hù)、失效保護(hù)、熱插拔、RS-485/RS-422收發(fā)器 |
| 文件頁(yè)數(shù)： | 13/18頁(yè) |
| 文件大?。?/td> | 503K |
| 代理商： | MAX3078E |
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Driver Output Protection
Thermal Shutdown
If the junction temperature exceeds +165
°
C, the driver is
switched off. Thermal hysteresis is 15
°
C, disabling ther-
mal shutdown once the temperature reaches +150
°
C.
Overcurrent Protection
A current-limiting circuit protects the transmitter output
stage against a short circuit to a positive and negative
battery voltage. Although the power dissipation increases
during this fault condition, this feature prevents destruc-
tion of the transmitter output stage.
Failure Management
The failure detector is fully active in normal operating
mode. After the detection of a single failure, the detec-
tor switches to the appropriate state (see Table 1).
The differential receiver threshold voltage is set to -3.2V
typically (V
CC
= 5V). This ensures correct reception
with a noise margin as high as possible in the normal
operating mode and in the event of failures 1, 2, 5, and 9.
If any of the wiring failures occur, the output signal on
pin
ERR
becomes LOW after detection. On error recov-
ery, the output signal on pin
ERR
becomes HIGH.
M
±80V Fault-Protected/Tolerant CAN
Transceivers for In-Car Applications
______________________________________________________________________________________
13
FAILURE
1
2
3
4
5
6
7
8
9
DESCRIPTION
MODE
Normal
Normal
All
All
Normal
Normal
All
All
Normal
CANH wire interrupted
CANL wire interrupted
CANH short circuited to battery
CANL short circuited to ground
CANH short circuited to ground
CANL short circuited to battery
CANL mutually short circuited to CANH
CANH short circuited to V
CC
CANL short circuited to V
CC
Table 1. Failure States
MODE
DESCRIPTION
Detection
The external termination resistance connected to the RTH pin provides an instantaneous pulldown of the open
CANH line to GND. Detection is provided, sensing the pulse-count difference between CANH and CANL (pulse
count = 4).
Receiver
Driver
The 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 CANH and CANL after the detection of four
consecutive pulses.
Failure 1
—
CANH Wire Interrupted (Normal Mode Only)
MODE
DESCRIPTION
Detection
The external termination resistance connected to the RTL pin provides an instantaneous pullup of the CANL line to
V
CC
. Detection is provided, sensing the pulse-count difference between CANL and CANH (pulse count = 4).
The receiver remains in differential mode. No received data lost.
Driver remains in differential mode. No transmission data lost.
Receiver
Driver
Recovery
Recovery is provided, sensing the pulse-count difference between CANL and CANH after the detection of four
consecutive pulses.
Failure 2
—
CANL Wire Interrupted (Normal Mode Only)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| MAX3078EAPA | 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3078EAPA+ | 功能描述:RS-422/RS-485 接口 IC 3.3V Fl-Sfe/Ht-Swp RS-485/RS-422 Tcvr RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3078EASA | 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3078EASA+ | 功能描述:RS-422/RS-485 接口 IC 3.3V Fl-Sfe/Ht-Swp RS-485/RS-422 Tcvr RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3078EASA+T | 功能描述:RS-422/RS-485 接口 IC 3.3V Fl-Sfe/Ht-Swp RS-485/RS-422 Tcvr RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
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