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參數(shù)資料
| 型號： | SP204 |
| 英文描述： | 5V High Speed RS-232 Transceivers with 0.1uF Capacitors(5V,帶0.1uF電容器的高速RS-232驅動器(4個驅動器)) |
| 中文描述： | 5V的高速RS - 232 0.1uF電容收發(fā)器（5V的，帶0.1uF電容器的高速的RS - 232驅動器（4個驅動器）） |
| 文件頁數(shù)： | 7/15頁 |
| 文件大小： | 363K |
| 代理商： | SP204 |
7
SP200/204/205/206/207/208/211/213
+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
+
+
+
+
–
–
–
–
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| SP207 | 5V High Speed RS-232 Transceivers with 0.1uF Capacitors(5V,帶0.1uF電容器的高速RS-232收發(fā)器(5個驅動器,3個接收器)) |
| SP207HB | Circular Connector; MIL SPEC:MIL-C-26482, Series I, Solder; Body Material:Aluminum; Series:PTB; No. of Contacts:6; Connector Shell Size:10; Connecting Termination:Solder; Circular Shell Style:Thru-Bulkhead Receptacle |
| SP207HBCA | PT 6C 6#20 PIN/SKT RECP |
| SP207HBCT | Circular Connector; MIL SPEC:MIL-C-26482, Series I, Solder; Body Material:Aluminum; Series:PTB; Number of Contacts:6; Connector Shell Size:10; Connecting Termination:Solder; Circular Shell Style:Thru-Bulkhead Receptacle |
| SP207HBEA | CONNECTOR; 71-128112-010 |
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