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参数资料
| 型号： | LT1796CN8 |
| 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, PDIP8 |
| 封装： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件页数： | 5/8页 |
| 文件大小： | 160K |
| 代理商： | LT1796CN8 |
5
LT1796
1796f
PIU
TXD (Pin 1):
Driver Input. Logic-level thresholds are set by
V
REF
. A logic input level higher than V
REF
turns the driver
outputs off, releasing control of the CANH and CANL lines.
A logic input less than V
REF
turns the driver outputs on,
pulling CANH high and CANL low. An open TXD input will
float high, turning the driver outputs off. The TXD input pin
can withstand voltages from –0.3V to 44V with no dam-
age.
GND (Pin 2):
Ground.
V
CC
(Pin 3):
Positive Supply Input. Normal operation is
with a 4.75V to 5.25V supply. Operation with supplies up
to 44V is possible with unterminated bus lines. Operation
at high voltages with normally terminated busses will
result in excessive power dissipation and activation of the
thermal shutdown circuit. V
CC
should be decoupled with
a 0.1
μ
F low ESR capacitor placed as close to the supply pin
as possible.
RXD (Pin 4):
Receiver TTL Level-Logic Output. A high level
output indicates a recessive state (zero-volt differential)
bus. A dominant state forces a low receiver output.
V
REF
(Pin 5):
Reference Output. The reference voltage sets
the TXD input threshold and the recessive bus common
mode voltage at CANH and CANL. V
REF
is approximately
V
CC
/2 for low voltage operation. When V
CC
> 7.5V, V
REF
maintains a 3.5V level.
CANL (Pin 6):
CAN Bus Low Data Line. The CANL pin is one
input to the receiver and the low driver output. In the
dominant state (TXD low), the driver pulls the CANL pin to
within 1V of GND. In the recessive state (TXD high), the
driver output stays high impedance. The CANL pin is
protected from voltage faults from –60V to 60V in domi-
nant, recessive, standby or powered off modes. On-chip
ESD protection meets IEC-1000-4-2 levels.
CANH (Pin 7):
CAN Bus High Data Line. The CANH pin is
one input to the receiver and the high driver output. In the
dominant state (TXD low), the driver pulls the CANH pin to
within 1V of V
CC
. In the recessive state (TXD high), the
driver output stays high impedance. The CANH pin is
protected from voltage faults from –60V to 60V in domi-
nant, recessive, standby or powered off modes. On-chip
ESD protection meets IEC-1000-4-2 levels.
R
S
(Pin 8):
Slope Control. This pin is a multifunction
control pin. When R
S
is high (V
RS
> 4V), the circuit goes
into a low power standby mode. In standby, the driver
always stays in a high impedance (recessive) state. The
receiver operates in a low power (slow) monitoring mode.
Received data may be used to “wake-up” the system to full
functionality. Full speed normal operation occurs if R
S
is
tied low through a resistance of less than 3k. The current
out of R
S
will be limited to about 500
μ
A in the low state.
Controlling the current out of R
S
with a resistor greater
than 3k or by using a current source allows slew rate
control of the data output onto CANH and CANL.
TYPICAL PERFOR U
Receiver Thresholds vs
Temperature
0.80
Receiver Propagation Delay vs
Temperature
TEMPERATURE (
°
C)
–50
V
T
0.75
0.70
0.65
0.60
–25
0
25
50
1796 G10
75
100
V
TH
RISING
V
TH
FALLING
TEMPERATURE (
°
C)
t
R
R
(
400
350
300
250
200
1796 G11
–50
–25
0
25
50
75
100
t
RXDOFF
t
RXDON
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| LT1796CS8#TR | 功能描述:IC CAN TXRX VOLT FAULT PROT8SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:121 系列:- 类型:收发器 驱动器/接收器数:1/1 规程:RS422，RS485 电源电压:3 V ~ 3.6 V 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-DFN（3x3） 包装:管件 |
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