参数资料
型号: LTC1482CS8#PBF
厂商: Linear Technology
文件页数: 15/16页
文件大小: 0K
描述: IC TXRX RS485 LOWPWR 8-SOIC
标准包装: 100
类型: 收发器
驱动器/接收器数: 1/1
规程: RS422,RS485
电源电压: 4.75 V ~ 5.25 V
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 管件
产品目录页面: 1354 (CN2011-ZH PDF)
8
LTC1482
Driver Output High Voltage vs
Output Current
Driver Output Low Voltage vs
Output Current
Driver Propagation Delay vs
Temperature
Driver Skew vs Temperature
Driver Propagation Delay vs
Supply Voltage
Driver Short-Circuit Current vs
Temperature
TYPICAL PERFOR A CE CHARACTERISTICS
UW
TEMPERATURE (
°C)
–55
DRIVER
SHORT-CIRCUIT
CURRENT
(mA)
1482 G36
250
200
150
100
50
0
VCC = 5.25V
DRIVER OUTPUT HIGH
SHORT TO –7V
DRIVER OUTPUT LOW
SHORT TO 10V
–35 –15
5
25
45
65
85 105 125
TEMPERATURE (
°C)
–55
DRIVER
SKEW
(ns)
1482 G34
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
–35 –15
5
25
45
65
85 105 125
SUPPLY VOLTAGE (V)
4.5
4.75
5
5.25
5.5
DRIVER
PROPAGATION
DELAY
(ns)
1482 G35
40
35
30
25
20
15
10
5
0
TA = 25°C
tPLH
tPHL
TEMPERATURE (
°C)
–55
DRIVER
PROPAGATION
DELAY
(ns)
1482 G33
40
35
30
25
20
15
10
5
0
VCC = 5V
tPHL
tPLH
–35 –15
5
25
45
65
85 105 125
external (DE = 0) driver. A weak internal pull-up removes
the need for an external pull-up resistor if fast rise times
are not important. Several LTC1482s can share the same
CD line. CD = 1 forces RO to the high fail-safe state. In
shutdown, CD is three-stated. This pin can be pulled above
VCC but should not be taken above 8V to avoid damage.
DE (Pin 3): Driver Enable Input. DE = 0 disables or three-
states the driver outputs. DE = 1 enables the driver outputs
with the high/low state of the outputs set by DI/SHDN.
DI/SHDN (Pin 4): Driver Input and Shutdown Input. It is
used together with the DE pin to put the part in shutdown
PIN FUNCTIONS
UU
U
RO (Pin 1): Receiver Output. If a carrier is present (CD low)
and the part is not in shutdown, RO is high if the receiver
input differential voltage (A – B)
≥ VTHRO(MAX) and low if
(A – B)
≤ VTHRO(MIN). RO is forced to high (fail-safe state)
if a carrier is not present (CD = 1). In shutdown, RO is
three-stated. If the driver is enabled, RO follows the logic
level at the driver input.
CD (Pin 2): Open-Drain Carrier Detect Output. Provided
that the part is not in shutdown, the CD output is low if
VTHCD(MIN) ≥ (A – B) ≥ VTHCD(MAX) and high if VTHCD(MIN)
< (A – B) < VTHCD(MAX). This is true regardless of whether
the A and B pins are driven by the internal (DE = 1) or an
OUTPUT CURRENT (mA)
0
10 20 30 40 50 60 70 80 90 100
DRIVER
OUTPUT
LOW
VOLTAGE
(V)
1482 G32
3.0
2.5
2.0
1.5
1.0
0.5
0
VCC = 4.75V
OUTPUT CURRENT (mA)
–100 –90 –80 –70 –60 –50 –40 –30 –20 –10 0
DRIVER
OUTPUT
HIGH
VOLTAGE
(V)
1482 G31
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
VCC = 4.75V
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