®
SP3239E
Intelligent +3.0V to +5.5V RS-232 Transceivers
s
Meets true EIA/TIA-232-F Standards
from a +3.0V to +5.5V power supply
s
Interoperable with EIA/TIA-232 and
adheres to EIA/TIA-562 down to a +2.7V
power source
s
Minimum 250Kbps data rate under load
s
Regulated Charge Pump Yields Stable
RS-232 Outputs Regardless of V
CC
Variations
s
Enhanced ESD Specifications:
+15KV Human Body Model
+15KV IEC1000-4-2 Air Discharge
+8KV IEC1000-4-2 Contact Discharge
DESCRIPTION
The SP3239E device is an RS-232 transceiver solution intended for portable or hand-held
applications such as notebook and palmtop computers. The SP3239E uses 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 SP3239E device to
deliver compliant RS-232 performance from a single power supply ranging from +3.0V to
+5.5V. The SP3239E is a 5-driver/3-receiver device, ideal for laptop/notebook computer and
PDA applications. The SP3239E includes one complementary receiver that remains alert to
monitor an external device's Ring Indicate signal while the device is shutdown.
SELECTION TABLE
Part
Number
Power
Supplies
RS-232
Drivers
RS-232
Receivers
External
Components
AUTO ON-LINE™
Circuitry
TTL
3-State
Number
of Pins
SP3223E
SP3243E
SP3238E
SP3239E
SP3249E
+3.0V to +5.5V
+3.0V to +5.5V
+3.0V to +5.5V
+3.0V to +5.5V
+3.0V to +5.5V
2
3
5
5
5
2
5
3
3
3
4 capacitors
4 capacitors
4 capacitors
4 capacitors
4 capacitors
YES
YES
YES
NO
NO
YES
YES
YES
YES
NO
20
28
28
28
24
Applicable U.S. Patents - 5,306,954; and other patents pending.
Rev.4/08/02
SP3239E Intelligent +3.0V to +5.5V RS-232 Transceivers
© Copyright 2002 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, SHUTDOWN, ...........................-0.3V to +6.0V
RxIN...................................................................+25V
Output Voltages
TxOUT.............................................................+13.2V
RxOUT,......................................-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 SSOP
(derate 11.2mW/
o
C above +70
o
C).................900mW
28-pin TSSOP
(derate 13.2mW/
o
C above +70
o
C)...............1100mW
Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
SPECIFICATIONS
V
CC
= +3.0 to +5.5, C1 -C4 = 0.1µF (tested at 3.3V + 5%), C1-C4 = 0.22µF (tested at 3.3V + 10%), C1 = 0.047µF, and C2-C4 = 0.33µF (tested at 5.0V
+ 10%), T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
DC CHARACTERISTICS
Supply Current, Shutdown
Supply Current
MIN.
TYP.
1.0
0.3
MAX.
10
1.0
UNITS
µA
CONDITIONS
SHUTDOWN = GND
TxIN = GND or V
CC
SHUTDOWN = V
CC
,
no load
mA
LOGIC INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold
0.8
2.4
Input Leakage Current
Output Leakage Current
Output Voltage LOW
Output Voltage HIGH
V
CC
- 0.6
V
CC
- 0.1
+0.01
+0.05
+1.0
+10
0.4
µA
µA
V
V
TxIN, SHUTDOWN
T
A
= 25° C
Receivers Disabled
I
OUT
= 1.6mA
I
OUT
= -1.0mA
V
V
CC
= +3.3V or +5.0V, TxIN,
SHUTDOWN
Rev.4/08/02
SP3239E Intelligent +3.0V to +5.5V RS-232 Transceivers
© Copyright 2002 Sipex Corporation
2
SPECIFICATIONS
V
CC
= +3.0 to +5.5, C1 -C4 = 0.1µF (tested at 3.3V + 5%), C1-C4 = 0.22µF (tested at 3.3V + 10%), C1 = 0.047µF, and C2-C4 = 0.33µF (tested at 5.0V
+ 10%), T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
DRIVER OUTPUTS
Output Voltage Swing
Output Resistance
Output Short-Circuit Current
RECEIVER INPUTS
Input Voltage Range
Input Threshold LOW
Input Threshold LOW
Input Threshold HIGH
Input Threshold HIGH
Input Hysteresis
Input Resistance
MIN.
TYP.
MAX.
UNITS
CONDITIONS
±5.0
300
±5.4
V
Ω
All driver outputs loaded with 3KΩ
to GND
V
CC
= V+ = V- = 0V, V
OUT
= ±2V
V
OUT
= GND
±35
±60
mA
-25
0.6
0.8
1.2
1.5
1.5
1.8
0.5
3
5
25
V
V
V
V
CC
= 3.3V
V
CC
= 5.0V
V
CC
= 3.3V
V
CC
= 5.0V
2.4
2.4
V
V
V
7
kΩ
Rev.4/08/02
SP3239E Intelligent +3.0V to +5.5V RS-232 Transceivers
© Copyright 2002 Sipex Corporation
3
SPECIFICATIONS
V
CC
= +3.0 to +5.5, C1 -C4 = 0.1µF (tested at 3.3V + 5%), C1-C4 = 0.22µF (tested at 3.3V + 10%), C1 = 0.047µF, and C2-C4 = 0.33µF (tested at 5.0V
+ 10%), T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +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
MIN.
TYP.
MAX.
UNITS
CONDITIONS
250
kbps
R
L
= 3k
Ω,
C
L
= 1000pF, one driver
switching
Receiver input to receiver output,
C
L
= 150pF
Normal operation
Normal operation
I t
PLH
- t
PLH
I,T
A
= 25
O
C
I t
PLH
- t
PLH
I
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
0.15
0.15
µS
200
200
100
50
30
ns
ns
ns
ns
V/
µs
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for V
CC
= +3.3V, 250kbps data rate, all drivers loaded with 3kΩ, 0.1µF charge
pump capacitors, and T
AMB
= +25°C.
TRANSMITTER OUTPUT vs. LOAD CAPACITANCE
6
4
2
0
-2 0
-4
-6
pF
1000
2000
3000
4000
5000
VOH
VOL
25
20
15
10
5
0
0
1000
2000
pF
3000
4000
5000
POS. SR
NEG SR
SLEW RATE vs. LOAD CAPACITANCE
Figure 1. Transmitter Output vs. Load Capacitance
SUPPLY CURRENT vs LOAD CAPACITANCE
60
50
40
30
20
10
0
0
1000
2000
pF
3000
4000
5000
250Kbps
120Kbps
20Kbps
Figure 2. Slew Rate vs. Load Capacitance
Figure 3. Supply Current vs. Load Capacitance when
Transmitting Data
Rev.4/08/02
SP3239E Intelligent +3.0V to +5.5V RS-232 Transceivers
© Copyright 2002 Sipex Corporation
4
PIN DESCRIPTION
NAME
C2+
GND
C2-
V-
T
1
OUT
T
2
OUT
T
3
OUT
R
1
IN
R
2
IN
T
4
OUT
R
3
IN
T
5
OUT
NC
SHUTDOWN
NC
R
1
OUT
T
5
IN
R
3
OUT
T
4
IN
R
2
OUT
R
1
OUT
T
3
IN
T
2
IN
T
1
IN
C1-
V
CC
V+
C1+
FUNCTION
Positive terminal of the inverting charge-pump capacitor.
Ground.
Negative terminal of the inverting charge-pump capacitor.
Regulated -5.5V output generated by the charge pump.
RS-232 driver output.
RS-232 driver output.
RS-232 driver output.
RS-232 receiver input.
RS-232 receiver input.
RS-232 driver output.
RS-232 receiver input.
RS-232 driver output.
No connect.
Apply logic LOW to shut down drivers and charge pump.
No connect or tie HIGH for normal operation.
Non-inverting receiver-1 output, active in shutdown.
TTL/CMOS driver input.
TTL/CMOS receiver output.
TTL/CMOS driver input.
TTL/CMOS receiver output.
TTL/CMOS receiver output.
TTL/CMOS driver input.
TTL/CMOS driver input.
TTL/CMOS driver input.
Negative terminal of the voltage doubler charge-pump capacitor.
+3.0V to +5.5V supply voltage.
Regulated +5.5V output generated by the charge pump.
Positive terminal of the voltage doubler charge-pump capacitor.
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Table 1. Device Pin Description
Rev.4/08/02
SP3239E Intelligent +3.0V to +5.5V RS-232 Transceivers
© Copyright 2002 Sipex Corporation
5
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