®
SP3223/3243
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
■
Minimum 120Kbps data rate under load
■
Regulated Charge Pump Yields Stable
RS-232 Outputs Regardless of V
CC
Variations
■
ESD Specifications:
+2kV Human Body Model
DESCRIPTION
The
SP3223
and
SP3243
products are RS-232 transceiver solutions intended for portable or
hand-held applications such as notebook and palmtop computers. The
SP3223
and
SP3243
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
SP3223/
SP3243
series to deliver compliant RS-232 performance from a single power supply ranging
from +3.3V to +5.0V. The
SP3223
is a 2-driver/2-receiver device, and the
SP3243
is a
3-driver/5-receiver device ideal for laptop/notebook computer and PDA applications.
The
SP3243
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
Drivers
2
3
RS-232
Receivers
2
5
External
Components
4 capacitors
4 capacitors
AUTO ON-LINE
®
TTL 3-State
Circuitry
YES
YES
YES
YES
No. of
Pins
20
28
SP3223
SP3243
+3.0V to +5.5V
+3.0V to +5.5V
Applicable U.S. Patents - 5,306,954; and other patents pending.
Rev. 6/30/03
SP3223 +3.0V to +5.5V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
1
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 and cause permanent damage to the
device.
V
CC
.......................................................-0.3V to +6.0V
V+ (NOTE 1).......................................-0.3V to +7.0V
V- (NOTE 1)........................................+0.3V to -7.0V
V+ + |V-| (NOTE 1)...........................................+13V
I
CC
(DC V
CC
or GND current).........................+100mA
Input Voltages
TxIN, ONLINE,
SHUTDOWN, EN (SP3223).................-0.3V to +6.0V
RxIN...................................................................+15V
Output Voltages
TxOUT...............................................................+15V
RxOUT, STATUS.......................-0.3V to (V
CC
+ 0.3V)
Short-Circuit Duration
TxOUT.....................................................Continuous
Storage Temperature......................-65°C to +150°C
Power Dissipation per package
28-pin PDIP (derate 16.0mW/
o
C above+70
o
C).....1300mW
20-pin SSOP (derate 9.25mW/
o
C above +70
o
C)....750mW
20-pin TSSOP (derate 11.1mW/
o
C above +70
o
C)..900mW
28-pin SOIC (derate 12.7mW/
o
C above +70
o
C)...1000mW
28-pin SSOP (derate 11.2mW/
o
C above +70
o
C)....900mW
NOTE 1:
V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
SPECIFICATIONS
Unless otherwise noted, the following specifications apply for V
CC
= +3.0V to +5.5V with T
AMB
= T
MIN
to T
MAX
.
Typical values apply at V
CC
= +3.3V or +5.0V and T
AMB
= 25°C.
PARAMETER
DC CHARACTERISTICS
Supply Current,
AUTO ON-LINE
®
1.0
10
µA
All RxIN open, ONLINE = GND,
SHUTDOWN = V
CC
, TxIN=V
CC
or
GND,V
CC
= +3.3V, T
AMB
= +25° C
SHUTDOWN = GND, TxIN=V
CC
or
GND, V
CC
= +3.3V, T
AMB
= +25° C
ONLINE = SHUTDOWN = V
CC
,
no load, V
CC
= +3.3V, T
AMB
= +25° C
MIN.
TYP.
MAX.
UNITS
CONDITIONS
Supply Current, Shutdown
1.0
10
µA
mA
Supply Current,
AUTO ON-LINE
®
Disabled
LOGIC INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold
LOW
HIGH
Input Leakage Current
0.3
1.0
0.8
2.0
±0.01
±1.0
V
µA
µA
V
V
V
CC
= +3.3V or +5.0V, TxIN,
EN (
SP3223
), ONLINE,
SHUTDOWN
TxIN, EN, ONLINE, SHUTDOWN,
T
AMB
= +25° C
Receivers disabled
I
OUT
= 1.6mA
I
OUT
= -1.0mA
Output Leakage Current
Output Voltage LOW
Output Voltage HIGH
V
CC
- 0.6
±0.05
±10
0.4
V
CC
- 0.1
Rev. 6/30/03
SP3223 +3.0V to +5.5V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
2
Unless otherwise noted, the following specifications apply for V
CC
= +3.0V to +5.5V with T
AMB
= T
MIN
to T
MAX
.
Typical values apply at V
CC
= +3.3V or +5.0V and T
AMB
= 25°C.
PARAMETER
DRIVER OUTPUTS
Output Voltage Swing
Output Resistance
Output Short-Circuit Current
Output Leakage Current
±5.0
300
±35
±70
±60
±100
±25
±5.4
V
Ω
mA
µA
All driver outputs loaded with 3K
Ω
to GND, T
AMB
= +25° C
V
CC
= V+ = V- = 0V, V
OUT
= ±2V
V
OUT
= 0V
V
OUT
= ±15V
V
CC
= 0V or 3.0V to 5.5V,
V
OUT
= ±12V, Drivers disabled
MIN.
TYP.
MAX.
UNITS
CONDITIONS
SPECIFICATIONS (continued)
RECEIVER INPUTS
Input Voltage Range
Input Threshold LOW
Input Threshold LOW
Input Threshold HIGH
Input Threshold HIGH
Input Hysteresis
Input Resistance
3
-15
0.6
0.8
1.2
1.5
1.5
1.8
0.3
5
7
2.4
2.4
15
V
V
V
V
V
V
kΩ
V
CC
= 3.3V
V
CC
= 5.0V
V
CC
= 3.3V
V
CC
= 5.0V
AUTO ON-LINE
®
CIRCUITRY CHARACTERISTICS (ONLINE = GND, SHUTDOWN = V
CC
)
STATUS Output Voltage LOW
STATUS Output Voltage HIGH
Receiver Threshold to Drivers
Enabled (t
ONLINE
)
Receiver Positive or Negative
Threshold to STATUS HIGH
(t
STSH
)
Receiver Positive or Negative
Threshold to STATUS LOW
(t
STSL
)
V
CC
- 0.6
200
0.5
0.4
V
V
µS
µS
I
OUT
= 1.6mA
I
OUT
= -1.0mA
Figure 15
Figure 15
20
µS
Figure 15
Rev. 6/30/03
SP3223 +3.0V to +5.5V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
3
SPECIFICATIONS (continued)
Unless otherwise noted, the following specifications apply for V
CC
= +3.0V to +5.5V with T
AMB
= T
MIN
to T
MAX
.
Typical values apply at V
CC
= +3.3V or +5.0V and T
AMB
= 25°C.
PARAMETER
TIMING CHARACTERISTICS
Maximum Data Rate
Receiver Propagation Delay
t
PHL
t
PLH
Receiver Output Enable Time
Receiver Output Disable Time
Driver Skew
Receiver Skew
Transition-Region Slew Rate
120
235
kbps
µs
ns
ns
500
1000
30
ns
ns
V/
µs
R
L
= 3K
Ω
, C
L
= 1000pF, one driver active
Receiver input to Receiver output, C
L
= 150pF
Normal operation
Normal operation
| t
PHL
- t
PLH
|, T
AMB
= 25
o
C
| t
PHL
- t
PLH
|
V
CC
= 3.3V, R
L
= 3K
Ω
, T
AMB
= 25
o
C,
measurements taken from -3.0V to +3.0V or
+3.0V to -3.0V
MIN.
TYP.
MAX.
UNITS
CONDITIONS
0.3
0.3
200
200
100
200
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for V
CC
= +3.3V, 120Kbps data rate, all drivers
loaded with 3KΩ, 0.1µF charge pump capacitors, and T
AMB
= +25°C.
14
6
12
10
Vout+
Vout-
Transmitter Output Voltage [V]
4
2
0
0
-2
-4
-6
Load Capacitance [pF]
500
1000
1500
Slew Rate [V/µs]
8
6
4
2
0
0
500
1000
1500
Load Capacitance [pF]
2000
+Slew
-Slew
Figure 1. Transmitter Output Voltage VS. Load
Capacitance for the SP3223
Figure 2. Slew Rate VS. Load Capacitance for the
SP3223
Rev. 6/30/03
SP3223 +3.0V to +5.5V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
4
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Unless otherwise noted, the following performance characteristics apply for V
CC
= +3.3V, 120Kbps data rate, all drivers
loaded with 3KΩ, 0.1µF charge pump capacitors, and T
AMB
= +25°C.
40
35
30
25
20
15
10
5
118KHz
60KHz
10KHz
6
Transmitter Output Voltage [V]
Supply Current [mA]
4
2
0
0
-2
-4
-6
500
1000
1500
2000
2500
Vout+
Vout-
0
0
500
1000
1500
Load Capacitance [pF]
2000
Load Capacitance [pF]
Figure 3. Supply Current VS. Load Capacitance when
Transmitting Data for the SP3223
Figure 4. Transmitter Output Voltage VS. Load
Capacitance for the SP3243
16
14
12
10
8
6
4
2
0
0
500
1000
1500
2000
2500
3000
Load Capacitance [pF]
+ Slew
- Slew
80
70
60
50
40
30
20
10
0
0
500
1000
1500
2000
2500
3000
Load Capacitance [pF]
118KHz
60KHz
10KHz
Figure 5. Slew Rate VS. Load Capacitance for the
SP3243
Figure 6. Supply Current VS. Load Capacitance when
Transmitting Data for the SP3243
Rev. 6/30/03
SP3223 +3.0V to +5.5V RS-232 Transceivers
Supply Current [mA]
Slew Rate [V/µs]
© Copyright 2003 Sipex Corporation
5
传感器
