參數(shù)資料
型號(hào)： TLE 6263
廠商： SIEMENS AG
英文描述： CAN-LDO-ASIC(控制區(qū)域網(wǎng)絡(luò)低壓差用于汽車(chē)電路的專(zhuān)用集成電路)
中文描述： 的CAN - LDO穩(wěn)壓器，專(zhuān)用集成電路（控制區(qū)域網(wǎng)絡(luò)低壓差用于汽車(chē)電路的專(zhuān)用集成電路）
文件頁(yè)數(shù)： 9/37頁(yè)
文件大?。?/td> 839K
代理商： TLE 6263
confidential
Preliminary Data
TLE 6263
9
version: 2.00 date: 19.12.00
To reduce EMI the dynamic slopes of the CANL and CANH signals are both limited and
symmetric. This allows the use of an unshielded twisted or parallel pair of wires for the
bus. During single-wire transmission (bus-failure) the EMI performance of the system is
degraded from the differential mode.
The differential receiver threshold is set to typ. -2.5 V. This ensures correct reception in
the normal operation mode as well as in the failure cases 1, 2, 3a and 4 with a noise
margin as high as possible.
Table 2,
CAN bus line failure cases (according to ISO 11519-2)
When one of the bus failures 3, 5, 6, 6a, and 7 is detected, the defective bus wire is
disabled by switching off the affected bus termination and output stage. Simultaneously
the multiplexing output of the receiver circuit is switched to the unaffected single ended
comparator.
Furthermore there is implemented a time-out feature to prevent the bus from being
blocked by a permanently dominant TxD input signal. Both, the CANL and CANH output
stage are automatically disabled after the delay time t
TxD
.
In order to protect the transceiver output stages from being damaged by shorts on the
bus lines, current limiting circuits are integrated. The CANL and CANH output stage
respectively are protected by an additional temperature sensor, that disables them as
soon as the junction temperature exceeds the maximum value. In the temperature shut-
down condition of the CAN output stages receiving messages from the bus lines is still
possible.
failure
#
1
2
3
3a
(no ISO failure)
CANL shorted to Vcc; 3.2 V < CANL < 7.2 V
4
CANH shorted to GND
5
CANL shorted to GND
6
CANH shorted to Vbat; CANH > 7.2 V
6a
(no ISO failure)
CANH shorted to Vcc; 1.8 V < CANH < 7.2 V
7
CANL shorted to CANH
failure description
CANL line interrupted
CANH line interrupted
CANL shorted to Vbat, CANL > 7.2 V
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