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參數(shù)資料
| 型號： | SP207HET |
| 元件分類： | RS-232 |
| 英文描述： | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| 中文描述： | 5V的高速RS - 232收發(fā)器與0.1uF電容 |
| 文件頁數(shù)： | 6/14頁 |
| 文件大?。?/td> | 216K |
| 代理商： | SP207HET |
TGoddard/SP207H/9614R0
SP207H/SP211H High–Speed Transceivers
6
Copyright 2000 Sipex Corporation
Figure 4. Charge Pump — Phase 3
age swing is
±
9V with no load, and
±
5V minimum
with full load. The transmitter outputs are pro-
tected against infinite short–circuits to ground
without degradation in reliability. The
SP207HB,
SP211H
and
SP211HB
drivers 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.
Because of the increased speed, the slew rate is
typically 60V/
μ
S which is above the RS-232
specifcation of 30V/
μ
S. This is the only param-
eter that exceeds the RS-232 limits.
Figure 3. Charge Pump Waveforms
+10V
a) C
2
+
GND
GND
b) C
2
–
–10V
V
CC
= +5V
–5V
+5V
–5V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
+
+
–
–
–
–
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.
相關PDF資料 |
PDF描述 |
|---|---|
| SP208EA | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP208 | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP208CA | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP208CP | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP208CT | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SP207R68JLF | 制造商:TT Electronics / IRC 功能描述:SP207R68JLF |
| SP207R68KLF | 制造商:TT Electronics / IRC 功能描述:SP207R68KLF |
| SP207R87KLF | 制造商:TT Electronics / IRC 功能描述:SP207R87KLF |
| SP208 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+5V High-Speed RS-232 Transceivers with 0.1mF Capacitors |
| SP208060JLF | 制造商:TT Electronics / IRC 功能描述:SP208060JLF |
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