參數(shù)資料
型號(hào)： SP208EHCP
英文描述： High Speed 5V High Performance RS232 Transceivers
中文描述： 高速5V的高性能RS232收發(fā)器
文件頁(yè)數(shù)： 7/15頁(yè)
文件大?。?/td> 213K
代理商： SP208EHCP
7
REV: A DATE:12/03/2003
+5V High-Speed RS232 Transceivers
Copyright 2000 Sipex Corporation
Figure 3. Charge Pump Waveforms
+10V
a) C
2
+
GND
GND
b) C
2
–
–10V
pump. Each model within the Series incorpo-
rates variations of these circuits to achieve the
desired configuration and performance.
Transmitter/Driver
The drivers are inverting transmitters, which ac-
cept either TTL or CMOS inputs and output the
RS-232 signals with an inverted sense relative to
the input logic levels. Typically, the RS-232 out-
put voltage swing is
±
9V with no load, and
±
5V
minimum with full load. The transmitter outputs
are protected against infinite short–circuits to
ground without degradation in reliability. The
drivers of the
SP200
,
SP205
,
SP205B
,
SP206
,
SP206B
,
SP207B, SP211
,
SP211B
and
SP213
can be tri–stated by using the SHUTDOWN
function.
In the “power off” state, the output impedance will
remain greater than 300 Ohms, again satisfying the
RS-232 specifications. Should the input of the
driver be left open, an internal 400kOhm pullup
resistor to V
forces the input high, thus commit-
ting the output to a low state. The slew rate of the
transmitter output is internally limited to a maxi-
mum of 30V/
μ
s in order to meet the EIA standards
(EIA RS-232D 2.1.7, Paragraph 5). The transition
of the loaded output from high to low also meets
the monotonicity requirements of the standard.
Receivers
The receivers convert RS-232 input signals to
inverted TTL signals. Since the input is usually
from a transmission line where long cable lengths
and system interference can degrade the signal,
the inputs have a typical hysteresis margin of
500mV. This ensures that the receiver is virtu-
ally immune to noisy transmission lines. Should
an input be left unconnected, a 5kOhm pulldown
resistor to ground will commit the output of the
receiver to a high state.
Figure 4. Charge Pump — Phase 3
V
CC
= +5V
–5V
+5V
–5V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
+
+
–
–
–
–
相關(guān)PDF資料
PDF描述
SP208EHCT High Speed 5V High Performance RS232 Transceivers
SP208EHEA High Speed 5V High Performance RS232 Transceivers
SP208EHEP High Speed 5V High Performance RS232 Transceivers
SP208EHET High Speed 5V High Performance RS232 Transceivers
SP208ECA +5V High Performance RS232 Transceivers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SP208EHCT 制造商:SIPEX 制造商全稱(chēng):Sipex Corporation 功能描述:High Speed +5V High Performance RS232 Transceivers
SP208EHCT-L 功能描述:RS-232接口集成電路 460KBPS 5V 4DRV/4RCV RS-232 0-70C RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝:
SP208EHCT-L/TR 功能描述:RS-232接口集成電路 460KBPS 5V 4DRV/4RCV RS-232 0-70C RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝:
SP208EHEA 制造商:SIPEX 制造商全稱(chēng):Sipex Corporation 功能描述:High Speed +5V High Performance RS232 Transceivers
SP208EHEA-L 功能描述:RS-232接口集成電路 460KBPS 5V 4DRV/4RCV RS-232 -40-85C RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝:
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