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| 型号： | SP213EHEA-L |
| 厂商： | Exar Corporation |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232 MULTI-CH 28SSOP |
| 标准包装： | 46 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 4/5 |
| 规程： | RS232 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 管件 |
5
Exar Corporation 48720 Kato Road, Fremont CA, 94538 50-668-707 www.exar.com
SP2EH_23EH_0_060
FEATuRES
As in the original RS-232 multi-channel
products, the
SP211EH and SP213EH high
speed multi–channel RS-232 line transceiv-
ersprovideavarietyofconfigurationstofit
most designs, especially high speed appli-
cations where +/-2V is not available. The
SP211EH/213EH is a superior high speed
drop-inreplacementtoourpreviousversions
as well as popular industry standards.
All devices in this series feature low–power
CMOS construction and
Exar's–proprietary
on-board charge pump circuitry to generate
the RS-232 signal voltages. The ability to
use 0.F charge pump capacitors saves
board space and reduces production costs.
The devices in this series provide different
driver/receiver combinations to match any
application requirement.
The
SP211EHandSP213EHmodels feature
alow–powershutdownmode,whichreduces
power supply drain to A. The
SP213EH
includesaWake-Upfunctionwhichkeeps
two receivers active in the shutdown mode,
unless disabled by the EN pin.
The family is available in 28 SOIC (wide)
and SSOP (shrink) small outline packages.
Devicescanbespecifiedforcommercial(0C
to+70C)andindustrial/extended(–40Cto
+85C)operatingtemperatures.
THEORY OF OPERATION
The
SP211EH and SP213EH devic-
es are made up of three basic cir-
cuit blocks — ) transmitter/driver,
2) receiver and 3) the
ExAR–proprietary
charge pump. Each model within the series
incorporates variations of these circuits to
achievethedesiredconfigurationandper-
formance.
Transmitter/Drivers
The drivers of this series can maintain a
typical data rate of 500kbps.
This superior RS-232 data transmission
rate makes the
SP211EH/213EH series an
ideal match for many designs in personal
computer peripherals and LAN applications
that demand high speed performance.
The drivers are inverting transmitters, which
accepteitherTTLorCMOSinputsandoutput
the RS-232 signals with an inverted sense
relativetotheinputlogiclevels. Typically,the
RS-232 output voltage swing is +/-9V with
no load, and +/-5V minimum with full load.
Thetransmitteroutputsareprotectedagainst
infinite short–circuits to ground without
degradation in reliability. The drivers of the
SP211EH, and SP213EH can be tri–stated
byusingtheSHUTDOWNfunction.
In the "power-off" state, the output imped-
ance will remain greater than 300 ohms,
againsatisfyingtheRS-232specifications.
Should the input of the driver be left open,
an internal 400k ohm pull-up resistor to VCC
forces the input high, thus committing the
output to a low state. The slew rate of the
transmitter output is internally limited to a
maximum of 30V/s in order to meet the
EIA/RS-232andITUV.28standards.The
transition of the output from high to low also
meets the monotonicity requirements of the
standard.
Receivers
The high performance receivers of the
SP211EH/213EH devices can accept input
signals at a typical data rate or 500kbps.The
receivers convert RS-232 level input signals
to inverted TTL level signals. Since the input
isusuallyfromatransmissionlinewherelong
cable lengths and system interference can
degrade the signal, the inputs have a typical
hysteresis margin of 500mV. This ensures
that the receiver is virtually immune to noisy
transmission lines. Should an input be left
unconnected, a 5k pull-down resistor to
ground will commit the output of the receiver
to a high state.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP213EHEA-L/TR | 功能描述:RS-232接口集成电路 460KBPS 4DRVR/5RCVR RS-232 -40-85C RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| SP213EHET | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:High Speed +5V High Performance RS232 Transceivers |
| SP213EHET-L | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| SP213ET | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:+5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP213ET/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:+5V High-Speed RS-232 Transceivers with 0.1mF Capacitors |
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