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參數(shù)資料
| 型號： | SP239A |
| 英文描述： | 5V Multi-Channel RS-232 Drivers/Receivers(5V,多通道RS-232線驅(qū)動器/接收器(3發(fā)5收）) |
| 中文描述： | 5V的多通道RS - 232驅(qū)動器/接收器（5V的，多通道的RS - 232線驅(qū)動器/接收器（3發(fā)5收）） |
| 文件頁數(shù)： | 12/17頁 |
| 文件大?。?/td> | 661K |
| 代理商： | SP239A |
SP30A/234A/235A/236A/237A/238A/239A/
SP241A/235B/236B/240A/240B/241A/241B
+5V Powered Multi-Channel RS-232 Drivers/Receivers
12
Copyright 2000 Sipex Corporation
cate. Once the computer is powered–up and ready,
it will send out a signal on the
DTR
to inform the
printer that it is powered–up and ready to go. The
printer really doesn’t care, since it will simply print
data as it is received. Accordingly, this pin is not
needed at the printer.
Data Set Ready (DSR)
Peripheral devices use this line to tell the computer
that they are on–line and ready to communicate.
When the printer is turned on and has completed its
self–test routine (assuming it does one), it will send
a signal to the PC by asserting this line.
Request To Send (RTS)
The computer activates this line to notify the
peripheral device that it is ready to send data. In this
example, the computer notifies the printer that it is
ready to send data to be printed by the printer.
Clear To Send (CTS)
This is the line on which the peripheral device tells
the computer that it is ready to receive data from
the computer. If the printer was not ready, i.e. it
was out of paper, for example, it would not assert
this line. Once the printer was ready to receive data
from the PC, it would assert this line. When it
receives the
CTS
signal from the printer, the PC
knows that a data transmission path has been
established between itself and the printer.
Transmitted Data (TD or TX)
This is the pin on which the computer sends the
actual data signal representing the actual informa-
tion to be printed, i.e. a positive voltage (+3V to
+15V) to represent a logic “0”, and a negative
voltage (-3V to -15V) to represent a logic “1”.
Ring Indicator (RI)
This line is used by the peripheral device to tell the
computer that a remote device wants to start com-
municating. A modem would activate the
RI
line
to tell the computer that a remote modem was
calling, i.e. the phone is ringing. In the case of a
printer, this line is unused.
Data Carrier Detect (DCD)
This line is used by a peripheral device to tell the
computer to expect to start receiving data at any
time. Since the printer would not be sending data
to the PC in this case this line is not needed.
Received Data (RD or RX)
This is the pin on which the computer receives the
incoming data signal, i.e. a positive voltage (+3V
to +15V) to represent a logic “0”, and a negative
voltage (-3V to -15V) to represent a logic “1”.
Again, in this instance, since the printer will not be
sending the PC any data, this line is not needed.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP234A | 5V Multi-Channel RS-232 Drivers(5V,多通道RS-232線驅(qū)動器) |
| SP235A | 5V Multi-Channel RS-232 Drivers/Receivers(5V,多通道RS-232線驅(qū)動器/接收器(5發(fā)5收）) |
| SP235B | 5V Multi-Channel RS-232 Drivers/Receivers(5V,多通道RS-232線驅(qū)動器/接收器(5發(fā)5收）) |
| SP236A | 5V Multi-Channel RS-232 Drivers/Receivers(5V,多通道RS-232線驅(qū)動器/接收器(4發(fā)3收）) |
| SP236B | 5V Multi-Channel RS-232 Drivers/Receivers(5V,多通道RS-232線驅(qū)動器/接收器(4發(fā)3收）) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP239ACS | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+5V Powered Multi-Channel RS-232 Drivers/Receivers |
| SP239ACT | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+5V Powered Multi-Channel RS-232 Drivers/Receivers |
| SP239ACX | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+5V Powered Multi-Channel RS-232 Drivers/Receivers |
| SP239AES | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+5V Powered Multi-Channel RS-232 Drivers/Receivers |
| SP239AET | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+5V Powered Multi-Channel RS-232 Drivers/Receivers |
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