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| 型号： | SP483ECN-L |
| 厂商： | Exar Corporation |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS485 LW EMI 8NSOIC |
| 标准包装： | 98 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | RS485 |
| 电源电压： | 5V |
| 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-SOICN |
| 包装： | 管件 |
| 其它名称： | 1016-1162-5 |
7
Exar Corporation 48720 Kato Road, Fremont CA, 94538 50-668-707 www.exar.com
SP483E_00_02092
The
SP483E is a half-duplex differential
transceiver that meets the requirements
of RS-485 and RS-422. Fabricated with
an
Exar proprietary BiCMOS process, this
product requires a fraction of the power of
older bipolar designs.
The RS-485 standard is ideal for multi-drop
applicationsandforlong-distanceinterfaces.
RS-485allowsupto32driversand32receiv-
ers to be connected to a data bus, making it
an ideal choice for multi-drop applications.
Since the cabling can be as long as 4,000
feet, RS-485 transceivers are equipped with
a wide (-7V to +12V) common mode range
to accommodate ground potential differ-
ences. Because RS-485 is a differential
interface, data is virtually immune to noise
in the transmission line.
Drivers
The driver outputs of the
SP483E are dif-
ferential outputs meeting the RS-485 and
RS-422 standards. The typical voltage
output swing with no load will be 0 Volts to
+5 Volts. With worst case loading of 54
across the differential outputs, the drivers
can maintain greater than 1.5V voltage
levels. The drivers have an enable control
line which is active HIGH. A logic HIGH on
DE (pin 3) will enable the differential driver
outputs. A logic LOW on the DE (pin 3) will
tri-state the driver outputs.
The
SP483E has internally slew rate lim-
ited driver outputs to minimize EMI. The
maximum data rate for the
SP483E drivers
is 250kbps under load.
Receivers
The
SP483E receivers have differential
inputs with an input sensitivity as low as
±200mV. Inputimpedanceofthereceiversis
typically15k(12kminimum). Awidecom-
mon mode range of -7V to +12V allows for
large ground potential differences between
systems. The receivers have a tri-state en-
able control pin. A logic LOW on RE (pin 2)
will enable the receiver, a logic HIGH on RE
(pin 2) will disable the receiver.
The
SP483E receiver is rated for data
rates up to 250kbps. The receivers are
equipped with the fail-safe feature. Fail-
safe guarantees that the receiver output
will be in a HIGH state when the input is
left unconnected.
Shutdown Mode
The
SP483E is equipped with a Shutdown
mode. To enable the shutdown state, both
driver and receiver must be disabled simul-
taneously. A logic LOW on DE (pin 3) and a
LogicHIGHonRE(pin2)willputthe
SP483E
into Shutdown mode. In Shutdown, supply
current will drop to typically A.
ESD TOLERANCE
The
SP483E incorporates ruggedized ESD
cells on all driver output and receiver input
pins. TheESDstructureisimprovedoverour
previous family for more rugged applications
and environments sensitive to electro-static
discharges and associated transients. The
improved ESD tolerance is at least ±15kV
without damage or latch-up.
There are different methods of ESD testing
applied:
a) MIL-STD-883, Method 3015.7
b) IEC61000-4-2 Air-Discharge
c) IEC61000-4-2 Direct Contact
DESCRIPTION
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP483ECN-L/TR | 功能描述:RS-485接口IC Low Pwr Half-Duplex RS-485 RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| SP483ECP | 制造商:Exar Corporation 功能描述: |
| SP483ECP-L | 功能描述:RS-485接口IC RS485 250 kbps EMI temp 0C to 70C RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| SP483EEN | 制造商:Exar Corporation 功能描述: |
| SP483EEN-L | 功能描述:RS-485接口IC RS485 250 kbps temp -40C to 85C RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
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