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PDF SP237ACS Data sheet ( Hoja de datos )
| Número de pieza | SP237ACS | |
| Descripción | +5V Powered Multi-Channel RS-232 Drivers/Receivers | |
| Fabricantes | Sipex | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SP237ACS (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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® SP230A/234A/235A/236A/237A/238A/241A
SP235B/236B/240A/240B/241A/241B
+5V Powered Multi-Channel RS-232 Drivers/Receivers
■ Operates from Single +5V Power Supply
■ Meets All RS-232D and V.28 Specifications
■ ±9V Output Swing with +5V Supply
■ Improved Driver Output Capacity for
Mouse Applications
■ Low Power Shutdown – 1µA
■ WakeUp Feature in Shutdown Mode
■ 3–State TTL/CMOS Receiver Outputs
■ ±30V Receiver Input Levels
■ Low Power CMOS – 5mA Operation
■ Wide Charge Pump Capacitor Value
Range – 1-10µF
T1OUT
T2 OUT
T2 IN
T1 IN
GND
VCC
C1+
V+
1
2
3
4
5
6
7
8
16 T3 OUT
15 T4OUT
14 T4IN
13 T3 IN
12 V-
11 C2-
10 C2+
9 C1-
Now Available in Lead Free Packaging
DESCRIPTION…
The SP230A Series are multi–channel RS-232 line drivers/receivers that provide a variety of
configurations to fit most communication needs, especially where ±12V is not available. Some models
feature a shutdown mode to conserve power in battery-powered systems. Some require no external
components. All, except one model, feature a built-in charge pump voltage converter, allowing them
to operate from a single +5V power supply. All drivers and receivers meet all EIA RS-232D and CCITT
V.28 requirements. The Series is available in plastic DIP and SOIC packages.
SELECTION TABLE
Model
SP230A
SP234A
SP235A
SP235B
SP236A
SP236B
SP237A
SP238A
SP240A
SP240B
SP241A
SP241B
Power
Supplies
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
No. of
RS-232
Drivers
5
4
5
5
4
4
5
4
5
5
4
4
No. of
RS-232
Rcvrs
0
0
5
5
3
3
3
4
5
5
5
5
External Low Power TTL Wake- No. of
Components Shutdown 3–State Up Pins
4 Capacitors Yes
No No
20
4 Capacitors
No
No No
16
None
Yes
Yes No
24
None
Yes Yes Yes 24
4 Capacitors Yes
Yes No
24
4 Capacitors Yes
Yes Yes 24
4 Capacitors
No
No No
24
4 Capacitors
No
No No
24
4 Capacitors Yes
Yes No
44
4 Capacitors Yes
Yes Yes 44
4 Capacitors Yes
Yes No
28
4 Capacitors Yes
Yes Yes 28
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
1
© Copyright 2004 Sipex Corporation
1 page  
Receiver Output Enable/Disable Times
5V
EN IN
0V
5V
EN IN
0V
5V
ROUT
0V
PINOUT
Disable
5V
ROUT
0V
T3 OUT
T1 OUT
T2 OUT
R1 IN
R1 OUT
T2 IN
T1 IN
GND
VCC
C1+
V+
C1-
1
2
3
4
5
6
7
8
9
10
11
12
24 T4 OUT
23 R2IN
22 R2OUT
21 T5 IN
20 T5 OUT
19 T4 IN
18 T3 IN
17 R3OUT
16 R3IN
15 V-
14 C2 -
13 C2 +
T2 OUT
T1 OUT
R 2IN
R 2OUT
T 1IN
R1OUT
R 1IN
GND
VCC
C1+
V+
C1-
1
2
3
4
5
6
7
8
9
10
11
12
Enable
24 T3 OUT
23 R3IN
22 R3OUT
21 T4 IN
20 T4 OUT
19 T3 IN
18 T2 IN
17 R4OUT
16 R4IN
15 V-
14 C2 -
13 C2 +
N.C. 1
T5IN
R3OUT
R3IN
T4OUT
T3OUT
T1OUT
T2OUT
N.C.
2
3
4
5
6
7
8
9
R2IN 10
N.C. 11
SP240A/B
33 N.C.
32 N.C.
31 N.C.
30 V–
29 C2–
28 C2+
27 C1–
26 V+
25 C1+
24 N.C.
23 N.C.
T 3OUT
T1OUT
T2 OUT
R2IN
R2OUT
T2 IN
T1 IN
R1OUT
R1IN
GND
VCC
C1+
V+
C1-
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 T4 OUT
27 R3IN
T 3OUT
T1OUT
26 R3OUT
T2 OUT
25 SHUTDOWN (SD) R2IN
24 EN
R2OUT
23 R4IN
T2 IN
22 R4OUT
T1 IN
21 T4 IN
R1OUT
20 T3 IN
R1IN
19 R5OUT
GND
18 R5IN
VCC
17 V-
C1+
16 C2-
15 C2+
V+
C1-
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 T4 OUT
27 R3IN
26 R3OUT
25 SHUTDOWN (SD)
24 EN
23 R4IN
22 R4OUT
21 T4 IN
20 T3 IN
19 R5OUT
18 R5IN
17 V-
16 C2-
15 C2+
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
5
© Copyright 2004 Sipex Corporation
5 Page 
Data Terminal Ready (DTR)
This is the pin the computer uses to tell periph-
eral devices that it is on–line and ready to
communicate.
Data Set Ready (DSR)
Peripheral devices use this line to tell the com-
puter that they are on–line and ready to commu-
nicate. When the modem 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 modem
that it is ready to send data to be transmitted by
the modem.
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 modem was not ready,
i.e. it was performing a loop–back self–test, for
example, it would not assert this line. Once the
modem was ready to receive data from the PC,
it would assert this line. When it receives the
CTS signal from the modem, the PC knows that
a data transmission path has been established
between itself and the modem.
Transmitted Data (TD or TX)
This is the pin on which the computer sends the
actual data signal to be transmitted, i.e. a posi-
tive voltage (+3V to +15V) to represent a logic
“0”, and a negative voltage (–3V to –15V) to
represent a logic “1”. The PC would send the
data on this line to be transmitted by the modem.
Ring Indicator (RI)
This line is used by the peripheral device to tell
the computer that a remote device wants to start
communicating. The modem would activate the
RI line to tell the computer that the remote
modem was calling, i.e. the phone is ringing.
Data Carrier Detect (DCD)
This line is used by the modem to tell the
computer that it has completed a transmission
path with the remote modem, and to expect to
start receiving data at any time.
Received Data (RD or RX)
This is the pin on which the modem sends the
computer the incoming data signal, i.e. a posi-
tive voltage (+3V to +15V) to represent a logic
“0”, and a negative voltage (-3V to -15V) to
represent a logic “1”.
INTERFACE EXAMPLE – A PRINTER
ON THE IBM PC SERIAL PORT
The RS-232 standard defines 22 serial interface
signals. These signals consist of ground lines,
timing, data, control and test signals, plus a set of
signals rarely used for a second data channel.
Many of these signal lines are not used in typical
RS-232 applications; in fact, the IBM® PC serial
port is implemented using only nine pins.
For example, consider the case of a PC using this
nine pin port to communicate with a peripheral
device such as a printer. We see the following
activity on each of the RS-232 lines as the com-
puter and printer are activated and communicate.
Signal Ground (GND)
The Signal Ground pin acts as a reference for all the
other signals. This pin is simply maintained at a 0V
level to serve as a level to which all other signals
are referenced. Both the PC and the printer will
have this line connected to their respective internal
ground lines.
Data Terminal Ready (DTR)
This is the pin the computer uses to tell peripheral
devices that it is on–line and ready to communi-
Signal Ground
Data Set Ready
R
Clear To Send
Ready To Send
Transmitted Data
(To Be Printed)
R
D
D
SP231A/232A
7
6
5
4
2
Signal Ground
D Data Set Ready
D Clear To Send
R Ready To Send
R
Received Data
(To Be Printed)
SP231A/232A
Computer
IBM Printer Port Interconnections
Printer
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
11
© Copyright 2004 Sipex Corporation
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet SP237ACS.PDF ] | |
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