®
SP3239
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
■
Minimum 250Kbps 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 SP3239 device is an RS-232 transceiver solution intended for portable or hand-held
applications such as notebook and palmtop computers. The SP3239 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 SP3239 device to
deliver compliant RS-232 performance from a single power supply ranging from +3.0V to
+5.0V. The SP3239 is a 5-driver/3-receiver device, ideal for laptop/notebook computer and
PDA applications. The SP3239 includes one complementary receiver that remains alert to
monitor an external device's Ring Indicate signal while the device is shutdown.
SELECTION TABLE
Device
SP3223
SP3243
SP3238
SP3239
SP3249
Power Supplies
+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
RS-232
Drivers
2
3
5
5
5
RS-232
Receivers
2
5
3
3
3
External
Components
4 capacitors
4 capacitors
4 capacitors
4 capacitors
4 capacitors
AUTO ON-LINE
®
Circuitry
YES
YES
YES
NO
NO
TTL 3-State
YES
YES
YES
YES
NO
No. of
Pins
20
28
28
28
24
Applicable U.S. Patents - 5,306,954; and other patents pending.
Rev. 7/01/03
SP3239 Intelligent +3.0V to +5.5V RS-232 Transceiver
© 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
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.
MAX.
UNITS
CONDITIONS
1.0
0.3
10
1.0
µA
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. 7/01/03
SP3239 Intelligent +3.0V to +5.5V RS-232 Transceiver
© Copyright 2003 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
TIMING CHARACTERISTICS
Maximum Data Rate
MIN.
TYP.
MAX.
UNITS
CONDITIONS
±5.0
300
±5.4
V
Ω
All driver outputs loaded with 3K
Ω
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
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
PHL
I,T
A
= 25
O
C
I t
PLH
- t
PHL
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
Receiver Propagation Delay
t
PHL
t
PLH
Receiver Output Enable Time
Receiver Output Disable Time
Driver Skew
Receiver Skew
Transition-Region Slew Rate
0.15
0.15
200
200
100
50
30
µS
ns
ns
ns
ns
V/
µs
Rev. 7/01/03
SP3239 Intelligent +3.0V to +5.5V RS-232 Transceiver
© Copyright 2003 Sipex Corporation
3
TYPICAL PERFOMANCE CHARACTERISTICS
Unless otherwise noted, the following perfomance 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
-4
-6
pF
0
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
SUPPLY CURRENT vs LOAD CAPACITANCE
60
50
40
30
20
10
0
0
1000
2000
pF
3000
4000
5000
250Kbps
120Kbps
20Kbps
Figure 3. Supply Current VS. Load Capacitance when
Transmitting Data
Rev. 7/01/03
SP3239 Intelligent +3.0V to +5.5V RS-232 Transceiver
© Copyright 2003 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 symmetrical charge-pump capacitor C2.
Ground.
Negative terminal of the symmetrical charge-pump capacitor C2.
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 symmetrical charge-pump capacitor C1.
+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 C1
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. 7/01/03
SP3239 Intelligent +3.0V to +5.5V RS-232 Transceiver
© Copyright 2003 Sipex Corporation
5
京公网安备 11010802033920号
EEWORLD
