RS232 DCE/DTE Sipex SP232A IC Datasheet - Solarbotics

TTL/CMOS OUTPUTS
TTL/CMOS INPUTS
T IN
1
T IN
2
R OUT
1
R OUT
2
Do not make
connection to
these pins
+5V INPUT
2 400k
5
T1 1 400k
18
T2 3 4
R1 20 19
R2 8
C +
1
5k
13
C 1-
C + 11
2
14
V+
C +
15
2
12 V-
17 V-
SP233ACP
GND GND
10
C 2 -
16
C 2 -
6
T OUT
1
T OUT
2
R IN
1
R IN
2
Figure 2. Typical Circuits using the SP233ACP and SP233ACT
The instantaneous slew rate of the transmitter
output is internally limited to a maximum of 30V/
µs in order to meet the standards [EIA RS-232-F ].
The transition region slew rate of these enhanced
products is typically 10V/µs. The smooth transition
of the loaded output from V OL to V OH clearly
meets the monotonicity requirements of the standard
[EIA RS-232-F].
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
TTL/CMOS OUTPUTS
TTL/CMOS INPUTS
2
0.1 µ F + C +
1
6.3V 4
5
C 1-
0.1 µ F + C +
2
16V 6 C 2-
T IN
1
T IN
2
R OUT
1
R OUT
2
10 µ F 6.3V
+
400k
Figure 3. Typical Circuits using the SP310A and SP312A
7
V CC
+5V INPUT
5k
12 15
T1 400k
17
V CC
Charge Pump
11 8
T2 13 14
R1 10 9
R2 SP310A
GND 16
5k
5k
9
0.1 µF
10V
3
V+ +
7
V-
18
+
RS-232 INPUTS
RS-232 OUTPUTS
Connect on PCB
Pin 11 to Pin 15
Pin 10 to Pin 16
Pin 12 to Pin 17
Both Pins 6 and 9 to GND
T OUT
1
T OUT
2
R IN
1
R IN
2
*
0.1 µF
10V
ON/OFF
*The negative terminal of the V+ storage capacitor can be tied
to either V CC or GND. Connecting the capacitor to V CC (+5V)
is recommended.
RS-232 INPUTS
RS-232 OUTPUTS
20 19
R2 inputs have a typical hysteresis margin of 500mV.
This ensures that the receiver is virtually immune
to noisy transmission lines.
The input thresholds are 0.8V minimum and 2.4V
maximum, again well within the ±3V RS-232
requirements. The receiver inputs are also protected
against voltages up to ±25V. Should an
input be left unconnected, a 5K pulldown resistor
to ground will commit the output of the receiver
to a high state.
Jan 3 -07 Rev B SP232A/233A/3 0A/3 2A © 2007 Sipex Corporation
TTL/CMOS OUTPUTS
TTL/CMOS INPUTS
TTL/CMOS OUTPUTS
TTL/CMOS INPUTS
R OUT
1
R OUT
2
T IN
1
T IN
2
R OUT
1
R OUT
2
Do not make
connection to
these pins
T IN
1
T IN
2
13
10
+5V INPUT
2 400k
5
T1 1 400k
18
T2 3 4
R1 13
C +
1
5k
14
C 1-
C + 12
2
8
V+
C +
15
2
10
V-
17
V-
SP233ACT
GND GND
11
C 2 -
16
C 2 -
400k
R 1
R 2
6
+5V INPUT
7
V CC
5k
17
2
0.1 µ F
C + V 10V
1
CC
0.1 µ F +
3
V+ +
6.3V
*
4 C 1-
5 Charge Pump
C +
0.1 µ F + 2
7
V- + 0.1 µ F
16V
10V
6 C 2-
EN
12 15
T1 400k
11 8
T2 1
10 µ F 6.3V
+
SP312A
GND 16
5k
5k
9
14
9
T OUT
1
T OUT
2
R IN
1
R IN
2
*The negative terminal of the V+ storage capacitor can be tied
to either V CCor GND. Connecting the capacitor to V CC(+5V)
is recommended.
18
T OUT
1
T OUT
2
R IN
1
R IN
2
RS-232 INPUTS
RS-232 OUTPUTS
Connect on PCB
Pin 12 to Pin 15
Pin 11 to Pin 16
Pin 10 to Pin 17
Both Pins 6 and 9 to GND
RS-232 INPUTS
RS-232 OUTPUTS
SHUTDOWN