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PDF SP331 Data sheet ( Hoja de datos )
| Número de pieza | SP331 | |
| Descripción | Programmable RS-232/RS-485 Transceiver | |
| Fabricantes | Sipex | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SP331 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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® SP331
Programmable RS-232/RS-485 Transceiver
s +5V Only Operation
s Software Programmable RS-232 or
RS-485 Selection
s Four RS-232 Transceivers in RS-232
Mode
s Two RS-485 Full-Duplex Transceivers
in RS-485 Mode
s Two RS-232 Transceivers and One
RS-485 Transceiver in Dual Mode
s Self-Testing Loopback Mode
s Full Driver Tri-State (Hi-Z) Control
s Ideal for RS-232 to RS-485 conversion
DESCRIPTION…
The SP331 is a programmable RS-232 and/or RS-485 transceiver IC. The SP331 contains four
drivers and four receivers when selected in RS-232 mode; and two drivers and two receivers
when selected in RS-485 mode. The SP331 also contains a dual mode which has two RS-232
drivers/receivers plus one differential RS-485 driver/receiver.
The RS-232 transceivers can typically operate at 230kbps while adhering to the RS-232
specifications. The RS-485 transceivers can operate up to 10Mbps while adhering to the RS-485
specifications. The SP331 includes a self-test loopback mode where the driver outputs are
internally configured to the receiver inputs. This allows for easy diagnostic serial port testing
without using an external loopback plug. The RS-232 and RS-485 drivers can be disabled
(High-Z output) by controlling a set of four select pins.
TI4 1
SEL_B 2
TX4 3
TX3 4
VCC 5
TX1 6
TX2 7
GND 8
C1+ 9
V+ (VDD) 10
C2+ 11
C1– 12
C2– 13
V– (VSS) 14
28 TI3
27 TI2
26 TI1
25 SEL_C
24 SEL_A
23 SEL_D
22 RX4
21 RX3
20 RX2
19 RX1
18 RI4
17 RI3
16 RI2
15 RI1
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
1
© Copyright 2000 Sipex Corporation
1 page  
SWITCHING WAVEFORMS
+3V
DRIVER INPUT
0V
DRIVER
OUTPUT
B
A
DIFFERENTIAL VO+
OUTPUT 0V
VA – VB VO–
tSKEW = |tDPLH - tDPHL|
f ≥ 1MHz; tR ≤ 10ns; tF ≤ 10ns
1.5V
1.5V
tPLH
tPHL
VO 1/2VO
tDPLH
tDPHL
tR
Figure 4. Driver Propagation Delays
1/2VO
tF
+3V
DE
0V
5V
A, B
VOL
VOH
A, B
0V
f = 1MHz; tR < 10ns; tF < 10ns
1.5V
tZL
2.3V Output normally LOW
2.3V
tZH
Output normally HIGH
1.5V
tLZ
0.5V
0.5V
tHZ
Figure 5. Driver Enable and Disable Times
V0D2+
A–B
V0D2–
VOH
RECEIVER OUT
VOL
tPHL
f = 1MHz; tR ≤ 10ns; tF ≤ 10ns
0V
INPUT
1.5V OUTPUT
tPLH
0V
1.5V
Figure 6. Receiver Propagation Delays
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
5
© Copyright 2000 Sipex Corporation
5 Page 
SP331 CONTROL LOGIC CONFIGURATION (Refer to Table 1)
SEL A
SEL B
SEL C
SEL D
0 00 0 00 1 11 1 1
0 00 1 11 0 00 1 1
0 01 0 01 0 01 0 0
0 10 0 10 0 10 0 1
1
1
1
0
26 TI1
T1
27 TI2
28 TI3
T2
T3
1 TI4
T4
TX1 6
TX2 7
TX3 4
TX4 3
26 TI1 T1
27 TI2 T2
28 TI3 T3
TX1 6
TX2 7
26 TI1 T1
TX3 4
TX4 3
28 TI3 T3
1 TI4 T4
TX1 6
TX2 7
26 TI1 T1
TX3 4
TX4 3
28 TI3 T3
TX1 6
TX2 7
TX3 4
TX4 3
19 RX1
20 RX2
21 RX3
22 RX4
RI1 15
R1
RI2 16
R2
RI3 17
R3
R4 RI4 18
19 RX1
20 RX2
21 RX3
R1 RI1 15
19 RX1 R1
RI2 16
R2
RI3 17
21 RX3
R3
R3
RI4 18
22 RX4
R4
RI1 15
RI2 16
19 RX1 R1
RI3 17
RI4 18
21 RX3 R3
RI1 15
RI2 16
RI3 17
RI4 18
SP331 LOOPBACK (Refer to Table 1)
SEL A
SEL B
SEL C
SEL D
0
0
1
1
0
1
1
1
1
0
1
1
1
1
1
1
26 TI1
T1
27 TI2 T2
28 TI3 T3
1 TI4
T4
19 RX1
R1
20 RX2
R2
21 RX3
R3
22 RX4 R4
TX1 6
TX2 7
TX3 4
TX4 3
RI1 15
RI2 16
RI3 17
RI4 18
26 TI1 T1
27 TI2 T2
28 TI3 T3
19 RX1
R1
20 RX2
R2
21 RX3 R3
TX1 6
TX2 7
26 TI1 T1
TX3 4
TX4 3
28 TI3 T3
1 TI4 T4
RI1 15
RI2 16
19 RX1 R1
RI3 17
RI4 18
21 RX3
R3
22 RX4
R4
TX1 6
TX2 7
26 TI1 T1
TX3 4
TX4 3
28 TI3 T3
RI1 15
RI2 16
19 RX1
R1
RI3 17
RI4 18
21 RX3
R3
TX1 6
TX2 7
TX3 4
TX4 3
RI1 15
RI2 16
RI3 17
RI4 18
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
11
© Copyright 2000 Sipex Corporation
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet SP331.PDF ] | |
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