SP310EET-L/TR Ver la hoja de datos (PDF) - Signal Processing Technologies
Número de pieza
componentes Descripción
Fabricante
SP310EET-L/TR Datasheet PDF : 15 Pages
| |||
+5V INPUT
7
VCC
T1 IN
2
400k Ω
T1
5
T2 IN
1
400k Ω
T2
18
R1OUT
R2OUT
Do not make
connection to
these pins
Internal
-10V Power
Supply
Internal
+10V Power
Supply
3
R1
4
5k Ω
20
13 C 1+
14 C 1-
10
V-
17
V-
8
V+
R2
19
5k Ω
SP233ECT
GND
GND
C 2 + 12
C 2 + 15
C 2 - 11
16
C2 -
6
9
T 1OUT
T 2OUT
R 1IN
R 2IN
Figure 2. Typical Circuits using the SP233ECP and SP233ECT
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-D
2.1.7, Paragraph (5)]. However, the transition re-
gion slew rate of these enhanced products is typi-
cally 10V/µs. The smooth transition of the loaded
output from VOL to VOH clearly meets the mono-
tonicity requirements of the standard [EIA
RS-232-D 2.1.7, Paragraphs (1) & (2)].
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 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 pro-
tected against voltages up to ±15V. Should an
input be left unconnected, a 5KOhm pulldown
resistor to ground will commit the output of the
receiver to a high state.
+5V INPUT
10
µF
6.3V
+
2
0.1µ F +
C 1+
17
V CC
6.3V
4
5
C 1-
Charge Pump
0.1µ F +
C 2+
16V
6 C 2-
T1 IN
12
T2 IN
11
400k Ω
T1
400k Ω
T2
0.1 µF
16V
V+ 3 +
*
V- 7
+
0.1 µF
16V
15
T 1OUT
8
T 2OUT
R1OUT
13
R2OUT
10
R1
14
R 1IN
5k Ω
R2
9
R 2IN
5k Ω
18
SP310E
ON/OFF
GND 16
*The negative terminal of the V+ storage capacitor can be tied
to either VCC or GND. Connecting the capacitor to VCC (+5V)
is recommended.
Figure 3. Typical Circuits using the SP310E and SP312E
+5V INPUT
10
µF
6.3V
+
2
0.1µ F +
C 1+
17
V CC
6.3V
4 C 1-
5
Charge Pump
0.1µ F +
C 2+
16V
6 C 2-
T1 IN
12
T2 IN
11
400k Ω
T1
400k Ω
T2
0.1µ F
16V
V+ 3 +
*
V- 7
+ 0.1µ F
16V
15
T 1OUT
8
T 2OUT
R1OUT
13
R2OUT
10
EN
1
R1
14
R 1IN
5k Ω
R2
9
R 2IN
5k Ω
SP312E
18
SHUTDOWN
GND 16
*The negative terminal of the V+ storage capacitor can be tied
to either VCC or GND. Connecting the capacitor to VCC (+5V)
is recommended.
Date: 7/19/04
SP202E Series High Performance RS232 Transceivers
5
© Copyright 2004 Sipex Corporation
Share Link: 