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參數(shù)資料
| 型號： | SP333 |
| 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)： | 6/13頁 |
| 文件大?。?/td> | 175K |
| 代理商： | SP333 |
6
TGoddard/SP333/9617R0
SP333 RS-232/AppleTalk Programmable Transceiver
Copyright 2000 Sipex Corporation
THEORY OF OPERATION...
The
SP333
is a single chip device that can be
configured via software for either RS-232 or
AppleTalk interface modes at any time. The
SP333
is made up of three basic circuit ele-
ments: single-ended drivers and receivers, dif-
ferential drivers and receivers, and charge pump.
APPLETALK DRIVERS/RECEIVERS...
To program the
SP333
for MacMode, Pin 25
should be connected to a logic HIGH. In
MacMode, the
SP333
offers a complete
AppleTalk serial interface.
The driver section of the AppleTalk interface is
made up of a differential driver and a single-
ended inverting driver. The differential driver
has voltage swings that are typically
±
5V on
each output pin under loaded conditions, and
typically
±
8V under no-load conditions. The
differential driver can maintain
±
3.6V (mini-
mum) swings (per pin) under worst case load
conditions of 450
between the differential
output.
The differential driver is equipped with a tri-
state control pin. When TXEN is a logic LOW,
the differential driver is active. When the TXEN
pin is a logic HIGH, the differential driver
outputs are tri-stated. The TXEN pin only
functions in MacMode. The differential
AppleTalk driver can support data rates up to
10Mbps.
The single-ended AppleTalk driver also has
typical voltage output swings of
±
5V under
loaded conditions, and
±
8V under no-load con-
ditions. The single-ended AppleTalk driver can
maintain
±
3.6V (minimum) swings under worst
case conditions of 450
to ground. The single-
ended AppleTalk driver can support data rates
over 400kbps.
The receiver section of the
SP333
is made up of
a differential receiver, a single-ended non-in-
verting receiver , and a single-ended inverting
receiver. The differential receiver has an input
sensitivity of
±
200mV over a common mode
range of
±
7V. The receivers have a typical input
resistance of 15k
(12k
minimum). The
differential receiver can receive data up to
10Mbps.
The single-ended non-inverting receiver has a
±
200mV input threshold, however, the input
voltage can vary between
±
7V. The typical
input resistance of the single-ended non-invert-
ing receiver is 15k
(12k
minimum). The
single-ended non-inverting receiver can also
receive data up to 10Mbps.
The
SP333
also has a single-ended inverting
receiver input. This receiver is basically an RS-
232 receiver (R5 receiver) and is typically used
as a GPI (General Purpose Input) in the
AppleTalk interface. The GPI input has TTL-
compatible input thresholds that can receive
+3V
0V
RXEN
5V
RX
x
0V
1.5V
1.5V
t
ZL
t
ZH
f = 1MHz; t
R
< 10ns; t
F
< 10ns
1.5V
1.5V
t
LZ
t
HZ
0.5V
0.5V
Output normally LOW
Output normally HIGH
V
IL
V
IH
RX
x
Figure 6. Receiver Enable and Disable Times
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP333ET | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP333CT | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP334 | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP334CT | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP334ET | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP333_07 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+5V Only RS-232/AppleTalk⑩ Programmable Transceiver |
| SP3338-14VP120 | 制造商:PCTEL 功能描述:ANTENNA UNIT |
| SP333CT | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+5V Only RS-232/AppleTalk Programmable Transceiver |
| SP333ET | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+5V Only RS-232/AppleTalk⑩ Programmable Transceiver |
| SP334 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Programmable RS-232/RS-485 Transceiver |
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