参数资料
型号: LT1796CS8
厂商: LINEAR TECHNOLOGY CORP
元件分类: 网络接口
英文描述: Overvoltage Fault Protected CAN Transceiver
中文描述: DATACOM, INTERFACE CIRCUIT, PDSO8
封装: 0.150 INCH, PLASTIC, SO-8
文件页数: 6/8页
文件大小: 160K
代理商: LT1796CS8
6
LT1796
1796f
FU
Driver Output
INPUTS BUS TERMINALS
R
S
V
RS
< 3V
V
RS
> 4V
V
RS
< 3V
V
RS
> 4V
TXD
0
0
1
1
CANH
High
Hi-Z
Hi-Z
Hi-Z
CANL
Low
Hi-Z
Hi-Z
Hi-Z
OPERATING STATE
Dominant
Standby
Recessive
Standby
Receiver Output
BUS VOLTAGE
V
BUS
= V
CANH
– V
CANL
V
BUS
< 0.5V
0.5V
V
BUS
0.9V
V
BUS
> 0.9V
V
BUS
< 0.5V
0.5V
V
BUS
0.9V
V
BUS
> 0.9V
R
S
<3V
<3V
<3V
>4V
>4V
>4V
RXD
High
RESPONSE TIME
Fast
Fast
Fast
Slow
Slow
Slow
Indeterminate
Low
High
Indeterminate
Low
TW
U
W
2.5V
V
DIFF
= V
CANH
– V
CANL
5V
TXD
0V
V
DIFF
V
DIFFLO
V
DIFFHI
25%
50%
1796 F02
t
TXDOFF
t
TXDON
2.5V
Figure 2. Driver Delay Waveforms
2.5V
5V
TXD
0V
RXD
0V
2V
0.8V
1796 F03
t
LBOFF
t
LBON
2.5V
Figure 3. Loopback Delay Waveforms
3V
CANL = 2.5V
3.5V
CANH
2.5V
RXD
0.8V
2V
1796 F04
t
RXDON
t
RXDOFF
3V
Figure 4. Reciever Delay Waveforms
2.5V
5V
R
S
0V
RXD
0.8V
1796 F05
t
WAKE
Figure 5. Wake Up from Standby Waveforms
TEST CIRCUIT
5V
0.1
μ
F
7
3
1
4
6
1796 F01
R
S
100pF
2
8
5
30pF
TXD
RXD
CANH
CANL
R
S
V
REF
GND
60
Figure 1. Switching Test Circuit
BLOCK DIAGRA
RX
CANH
CANL
1796 BD
GND
V
REF
SLOPE/
STANDBY
REFERENCE
VOLTAGE
DRIVER
V
CC
3
7
6
2
5
RXD
4
R
S
8
TXD
1
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