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EXAR

SP332 Datasheet Preview

SP332 Datasheet

RS-232/RS-485 Multi-mode SerialTransceiver

No Preview Available !

SP332
RS-232/RS-485 Multi-mode SerialTransceiver
• +5V Only Single Supply Operation
• Software Programmable RS-232 or RS-485
Selection
• 4 Drivers, 4 Receivers RS-232
• 2 Drivers, 2 Receivers RS-485
• Loop back function for Self Test
• 28-pin WSOIC package
TI4
SEL_B
TX4
TX3
VCC
TX1
TX2
GND
C1+
V+
C2+
C1–
C2–
V–
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 TI3
27 TI2
26 TI1
25 SD
24 SEL_A
23 LB
22 RX4
21 RX3
20 RX2
19 RX1
18 RI4
17 RI3
16 RI2
15 RI1
DESCRIPTION
The SP332 is a monolithic device that contains both RS-232 and RS-485 line drivers and
receivers. The configuration of the SP332 can be changed at any time by changing the logic
state of two control pins. The device also includes a loop back function which internally con-
nects driver outputs to receiver inputs for a chip self test. An Exar-patended charge pump
allows +5V-only operation.
TYPICAL APPLICATIONS CIRCUIT
0.1µF
0.1µF
0V
0V
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
RS-232 Mode
+5V
9 C1+
5
VCC
SP33212 C1-
11 C2+
V+ 10
V- 14
13 C2-
24 SEL A
2 SEL B
0.1µF
LOOPBACK 23
Vcc
400KΩ
26 TI1
T1
Vcc
TX1 6
400KΩ
27 TI2
T2
Vcc
TX2 7
400KΩ
28 TI3
T3
Vcc
400KΩ
1 TI4
T4
TX3 4
TX4 3
0.1µF
TTL/CMOS
RS-232
RS-232
RS-232
RS-232
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
19 RX1
20 RX2
21 RX3
22 RX4
8 GND
R1 RI1 15
5KΩ
R2 RI2 16
5KΩ
R3 RI3 17
5KΩ
R4 RI4 18
5KΩ
25
SHUTDOWN
RS-232
RS-232
RS-232
RS-232
TTL/CMOS
0.1µF
0.1µF
+5V
+5V
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
Full Duplex RS-485 Mode
+5V
5
9 C1+
12 C1-
11 C2+
VCC
SP332 V+ 10
V- 14
0.1µF
13
24
2
C2-
SEL A
SEL B
Vcc
400KΩ
26 TI1
27 TI2 Vcc
400KΩ
28 TI3
1 TI4
19 RX1
20 RX2
0.1µF
LOOPBACK 23
TTL/CMOS
TX2 7
T1
TX1 6
TX4 3
T3 TX3 4
RI2 16
R1 15KΩ
RI1 15
15KΩ
RS-485
RS-485
RS-485
RS-485
RS-485
RS-485
21 RX3
R3
RI4 18
15KΩ
RI3 17
RS-485
RS-485
22 RX4
15KΩ
8 GND
SHUTDOWN 25
TTL/CMOS
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP332_100_012610




EXAR

SP332 Datasheet Preview

SP332 Datasheet

RS-232/RS-485 Multi-mode SerialTransceiver

No Preview Available !

ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation
of the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may
affect reliability.
VCC.......................................................................+7V
Input Voltages
Logic............................-0.5V to (Vcc+0.5V)
Drivers.........................-0.5V to (Vcc+0.5V)
Receivers......................+/-30V @ ≤100mA
Driver Outputs..................................................+/-15V
Maximum Data Rate..........................8Mbps (Note 1)
ABSOLUTE MAXIMUM RATINGS
Storage Temperature.......................-65˚C to +150˚C
Power Dissipation
28-pin WSOIC...................................1000mW
Package Derating:
28-pin WSOIC
øJA................................................40 °C/W
Limits are specified at TA = 25°C and VCC = +5.0V unless otherwise noted.
PARAMETER
MIN. TYP. MAX.
RS-485 DRIVER
DC Characteristics
Differential Output Voltage
GND
Vcc
Differential Output Voltage
2.0
5.0
Differential Output Voltage
1.5
5.0
Change in Magnitude of Driver
Differential Output Voltage for
Complementary States
Driver Common-Mode Output
Voltage
Input High Voltage
2.0
0.2
3
Input Low Voltage
0.8
Input Current
+/-10
Pull-Up Current
Pull-Down Current
Driver Short Circuit Current
VOUT = HIGH
Driver Short Circuit Current
VOUT = LOW
AC Characteristics
Driver Data Rate
Driver Data Rate
Driver Input to Output tPLH
Driver Input to Output tPHL
1.5
3.0
35 250
35 250
10
8
70 180
70 180
SPECIFICATIONS
UNITS CONDITIONS
Volts
Volts
Volts
Volts
Unloaded; R = ∞; See Figure 1
With load; R = 50Ω (RS-422); See
Figure 1
With load; R = 27Ω (RS-485); See
Figure 1
R = 27Ω or R = 50Ω; See Figure 1
Volts R = 27Ω or R = 50Ω; See Figure 1
Volts
Volts
µA
µA
µA
mA
Applies to transmitter inputs, SEL A,
SEL B, SD and LB
Applies to transmitter inputs, SEL A,
SEL B, SD and LB
Applies to transmitter inputs, SEL A,
SEL B, SD and LB
-7V ≤ VO ≤ 10V
mA -7V ≤ VO ≤ 10V
Mbps
Mbps
ns
ns
TA = +85°C, Note 1
RDIFF = 54Ω, CL1 = CL2 = 100pF; See
Figures 3 and 5
RDIFF = 54Ω, CL1 = CL2 = 100pF; See
Figures 3 and 5
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP332_100_012610


Part Number SP332
Description RS-232/RS-485 Multi-mode SerialTransceiver
Maker EXAR
PDF Download

SP332 Datasheet PDF






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