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PDF SP3243EU Data sheet ( Hoja de datos )
| Número de pieza | SP3243EU | |
| Descripción | High Speed Intelligent +3.0V to +5.5V RS-232 Transceivers | |
| Fabricantes | Sipex | |
| Logotipo |  |
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® SP3223EU/3243EU
High Speed Intelligent +3.0V to +5.5V
RS-232 Transceivers
■ Meets true EIA/TIA-232-F Standards
from a +3.0V to +5.5V power supply
■ Interoperable with EIA/TIA-232 and
adheres to EIA/TIA-562 down to a +2.7V
power source
■ AUTO ON-LINE® circuitry automatically
wakes up from a 1µA shutdown
■ Regulated Charge Pump Yields Stable
RS-232 Outputs Regardless of V
CC
Variations
■ Enhanced ESD Specifications:
+15kV Human Body Model
+15kV IEC1000-4-2 Air Discharge
+8kV IEC1000-4-2 Contact Discharge
■ 1000 Kbps minimum transmission rate
■ Ideal for High Speed RS-232 Applications
EN 1
C1+ 2
20 SHUTDOWN
19 VCC
V+ 3
C1- 4
C2+ 5
C2- 6
V- 7
18 GND
17 T1OUT
SP3223EU 16 R1IN
15 R1OUT
14 ONLINE
T2OUT 8
R2IN 9
R2OUT 10
13 T1IN
12 T2IN
11 STATUS
Now Available in Lead Free Packaging
DESCRIPTION
The SP3223EU and 3243EU products are RS-232 transceiver solutions intended for portable or hand-
held applications such as notebook and palmtop computers. The "U" series is based on Sipex's
SP3223E/3243E series and has been enhanced for high speed. The data rate is improved to 1000kbps,
easily meeting the demands of high speed RS-232 applications. The SP3223EU and 3243EU use an
internal high-efficiency, charge-pump power supply that requires only 0.1µF capacitors in 3.3V
operation. This charge pump and Sipex's driver architecture allow the SP3223EU/3243EU series to
deliver compliant RS-232 performance from a single power supply ranging from +3.0V to +5.5V. The
SP3223EU is a 2-driver/2-receiver device, and the SP3243EU is a 3-driver/5-receiver device, ideal for
laptop/notebook computer and PDA applications. The SP3243EU includes one complementary
receiver that remains alert to monitor an external device's Ring Indicate signal while the device is
shutdown.
The AUTO ON-LINE® feature allows the device to automatically "wake-up" during a shutdown state
when an RS-232 cable is connected and a connected peripheral is turned on. Otherwise, the device
automatically shuts itself down drawing less than 1µA.
SELECTION TABLE
Device
Power Supplies RS-232 RS-232
External
Auto-Online TTL 3-State No. of
Drivers Receivers Components
Circuitry
Pins
SP3223EU +3.0V to +5.5V
2
2
4 capacitors
YES
YES 20
SP3243EU +3.0V to +5.5V
3
5
4 capacitors
YES
YES 28
Applicable U.S. Patents - 5,306,954; and other patents pending.
Date: 06/28/04
SP3223EU/3243EU +3.0V to +5.5V RS-232 Transceivers
1
© Copyright 2004 Sipex Corporation
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for V = +3.3V, 1000kbps data rate, all drivers
CC
loaded with 3kΩ, 0.1µF charge pump capacitors, and TAMB = +25°C.
6
4 2Mbps
1.5Mbps
1Mbps
2
0
1 TX at full data rate
2 TX’s at1/16 data rate
-2
-4
2Mbps
1.5Mbps
1Mbps
-6
0 250 500 1000 1500
Load Capacitance (pF)
2000
Figure 7. Transmitter Output Voltage VS. Load
Capacitance for the SP3243EU
120
100
80
60
40
20
0
0
Slew +
1 TX at 1Mbps
2 TX’s at 62.5Kbps
All TX loaded 3K // CLoad
Slew -
250 500 1000 1500
Load Capacitance (pF)
2000
Figure 8. Slew Rate VS. Load Capacitance for the
SP3243EU
50
40
2 Mbps
30
1.5 Mbps
1 Mbps
20
10
0
0
1 TX at full data rate
2 TX’s at 1/16 data rate
All TX loaded 3K // CLoad
250 500 1000
Load Capacitance (pF)
1500
Figure 9. Supply Current VS. Load Capacitance for the
SP3243EU
30
25
20
15
10
5
0
2.7
1 Driver at 1Mbps
Other Drivers at 62.5Kbps
All Drivers Loaded with 3K // 250pF
3 3.5 4 4.5
Supply Voltage (V)
5
Figure 10. Supply Current VS. Supply Voltage for the
SP3243EU
Date: 06/28/04
SP3223EU/3243EU +3.0V to +5.5V RS-232 Transceivers
5
© Copyright 2004 Sipex Corporation
5 Page 
DEVICE: SP3223EU
SHUTDOWN
0
EN
0
TXOUT
High Z
RXOUT
Active
0 1 High Z High Z
1
0
Active
Active
1
1
Active
High Z
DEVICE: SP3243EU
SHUTDOWN
0
T OUT
X
High Z
R OUT
X
High Z
R OUT
2
Active
1
Active
Active
Active
Table 2. SHUTDOWN and EN Truth Tables
Note: In AUTO ON-LINE® Mode where ONLINE =
GND and SHUTDOWN = VCC, the device will shut down
if there is no activity present at the Receiver inputs.
+3V to +5V
+
C5 0.1µF
+
C1 0.1µF
+
C2 0.1µF
TTL/CMOS
INPUTS
C1+
VCC
V+
C1-
C2+ SP3223EU
SP3243EU
C2-
V-
T1IN
T1OUT
TXIN
TXOUT
+
C3 0.1µF
C4 0.1µF
+
TTL/CMOS
OUTPUTS
VCC
To µP Supervisor
Circuit
R1OUT
R1IN
5kΩ
RXOUT
EN *
RXIN
5kΩ
1000pF
SHUTDOWN
ONLINE
STATUS
GND
1000pF
* SP3223EU Only
Figure 17. Loopback Test Circuit for RS-232 Driver
Data Transmission Rates
Figure 17 shows a loopback test circuit used to
test the RS-232 Drivers. Figure18 shows the test
results where one driver was active at 1Mbps and
all three drivers loaded with an RS-232 receiver
in parallel with a 250pF capacitor. Figure 19
shows the test results of the loopback circuit with
all drivers active at 250kbps with typical
RS-232 loads in parallel with 1000pF capacitors. A
superior RS-232 data transmission rate of 1Mbps
makes the SP3223EU/3243EU series an ideal
match for high speed LAN and personal com-
puter peripheral applications.
Receivers
The receivers convert +5.0V EIA/TIA-232
levels to TTL or CMOS logic output levels. The
SP3223EU receivers have an inverting output
that can be disabled by using the EN pin.
Figure 18. Loopback Test results at 1Mbps
Figure 19. Loopback Test results at 250Kbps
Date: 06/28/04
SP3223EU/3243EU +3.0V to +5.5V RS-232 Transceivers
11
© Copyright 2004 Sipex Corporation
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet SP3243EU.PDF ] | |
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